JP7675481B2 - Drive control device - Google Patents

Description

The present invention relates to a drive control device.

Claim 1 of the following Patent Document 1 describes a control device that includes a circuit board on which electrical components constituting a control circuit are mounted, and receives a signal from a sensor to control a controlled object, the circuit board having a plurality of ground patterns, the plurality of ground patterns including at least one outer edge ground pattern formed along at least a portion of the outer periphery of the circuit board, the outer edge ground pattern being configured to surround the other plurality of ground patterns along at least a portion of the outer periphery of the circuit board, and each of the ground patterns other than the outer edge ground pattern being connected in a DC manner without a resistor, directly to the outer edge ground pattern or indirectly via the other ground patterns, and being connected in an AC manner, directly to the outer edge ground pattern via at least one capacitor, or indirectly via the other ground patterns, in a portion other than the DC-connected portion.

Patent document 1 also states in paragraph 0045 that "In the circuit board 100 of the control device 10, PG172, which is an outer edge ground pattern, is formed along the outer periphery of the circuit board 100, and LG170 is formed inside (closer to the center) of the circuit board 100 relative to PG172, and PG172 and LG170 are AC-connected via capacitors 200a-d. In other words, PG172 and LG170 are DC-connected via GND connection pattern 174 as described above, but are also AC-connected via capacitors 200a-d, and are coupled to each other with low impedance at high frequencies near each connection point."

Patent No. 5740427

Incidentally, as in the background art described above, providing separate power supply patterns and ground patterns (ground patterns) for large signal circuits that handle signals with relatively large amplitudes and small signal circuits that handle signals with relatively small amplitudes to suppress mutual interference between large signal circuits and small signal circuits is a common technique used in circuit implementation technology. However, when there are multiple small signal circuits to which power is supplied, in order to ensure power supply redundancy, it is necessary to provide multiple power supply patterns and ground patterns for each small signal circuit.

However, when multiple power supply patterns and ground patterns are provided for each small signal circuit, the pattern width of each power supply pattern and ground pattern must be narrowed, which means that the power supply paths such as the power supply patterns and ground patterns must be narrowed, increasing the impedance of the power supply path. As a result, the small signal circuits become more susceptible to the effects of noise.

The present invention has been made in consideration of the above-mentioned circumstances, and aims to provide a drive control device that can suppress a decrease in noise resistance while ensuring redundancy in the power supply of multiple small signal circuits.

To achieve the above object, the present invention employs, as a first solution for a drive control device, a power supply terminal connected to an external power supply so as to have redundancy, a plurality of small signal circuits to which a small signal power supply input to the power supply terminal is supplied by a first power supply wiring and a first ground wiring, a drive circuit that is supplied with a drive power supply by a second power supply wiring and a second ground wiring and generates a predetermined drive signal based on the drive power supply, and a capacitor connected to the first ground wiring and the second ground wiring.

The present invention employs a second solution for the drive control device, which is the first solution, in which the capacitor is provided for each of the second ground wirings, which are provided in multiple numbers corresponding to the multiple small signal circuits.

The present invention employs a third solution relating to a drive control device, which is the first or second solution, in which the small signal circuit is a current sensor that detects the output current of a three-phase inverter, and the drive circuit is a gate driver that generates a gate signal that controls the three-phase inverter.

In the present invention, as a fourth solution related to the drive control device, in the first or second solution, the small signal circuit is three driving current sensors that respectively detect the output current of a three-phase drive inverter that drives a drive motor, three generation current sensors that respectively detect the input current of a three-phase power generation inverter that converts three-phase AC power input from a generator into DC power, and a reactor current sensor that is provided between a battery and the three-phase drive inverter and the three-phase power generation inverter, and detects a reactor current of a step-up/step-down converter that boosts the DC power input from the battery and outputs it to the three-phase drive inverter, while stepping down the DC power input from the three-phase drive inverter and/or the three-phase power generation inverter and outputs it to the battery, and the drive circuit is a gate driver that generates a gate signal to control the three-phase power generation inverter, the three-phase power generation inverter, and the step-up/step-down converter.

The present invention employs a fifth solution relating to the drive control device, which is the fourth solution described above, in which the power supply terminal is configured to supply power from the small signal power source in a state in which redundancy is provided to at least the three drive current sensors.

The present invention provides a drive control device that can suppress a decrease in noise resistance while ensuring redundancy in the power supply for multiple small signal circuits.

1 is a block diagram showing the overall configuration of a drive control device according to an embodiment of the present invention. 2 is a block diagram showing a power supply system of a drive control device according to an embodiment of the present invention. FIG. 2 is a circuit diagram showing a power supply circuit of a GD substrate in a drive control device according to an embodiment of the present invention. 3 is a block diagram showing power supply redundancy in a drive control device according to an embodiment of the present invention; FIG. 4 is a block diagram showing a noise passage path in the drive control device according to the embodiment of the present invention. FIG. FIG. 11 is a block diagram showing a power supply system of a drive control device according to a modified example of the embodiment of the present invention.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
The drive control device A according to this embodiment is a drive control circuit that controls the drive of a PCU 1 (power control unit) as shown in the figure, and includes an ECU 2 and a gate driver 3.

The PCU 1 is an assembly of three power conversion circuits, more specifically, it has a step-up/step-down converter 1a, a driving inverter 1b, and a power generation inverter 1c. The step-up/step-down converter 1a has a reactor, multiple switching transistors, and a smoothing capacitor, and boosts the DC power supplied to the primary side from a battery pack such as a lithium-ion battery and supplies it to the secondary side driving inverter 1b, while stepping down the DC power (regenerated power and/or generated power) input from the secondary side driving inverter 1b and/or power generation inverter 1c and supplies it to the primary side battery pack.

The driving inverter 1b is a three-phase inverter equipped with multiple switching transistors that converts the DC power input from the step-up/step-down converter 1a into three-phase AC power and supplies it as a drive signal to the driving motor, while also converting the regenerative power (three-phase AC power) input from the driving motor into DC power and supplies it to the secondary side of the step-up/step-down converter 1a. The driving motor is a three-phase synchronous motor that generates rotational power for driving and supplies it to the wheels of the electric vehicle.

The power generation inverter 1c is a three-phase inverter equipped with multiple switching transistors that converts the power generated by a generator attached to the electric vehicle (three-phase AC power) into direct current power and supplies it to the secondary side of the step-up/step-down converter 1a. In other words, the PCU 1 is a power conversion circuit provided between the drive motor and generator and the assembled battery, and passes power in both directions between the drive motor and generator and the assembled battery.

Details will be described later, but the step-up/step-down converter 1a, the driving inverter 1b, and the power generation inverter 1c are provided with various sensors that detect state quantities that indicate the operating state. For example, the step-up/step-down converter 1a is provided with a primary voltage sensor that detects the primary voltage, a secondary voltage sensor that detects the secondary voltage, and a reactor current sensor that detects the reactor current flowing between the primary side and the secondary side.

The running inverter 1b is provided with three current sensors (U-phase running current sensor, V-phase running current sensor, and W-phase running current sensor) that detect the three-phase running current, i.e., U-phase running current, V-phase running current, and W-phase running current, that flows between the running inverter 1b and the running motor. The power generation inverter 1c is provided with three current sensors (U-phase running current sensor, V-phase running current sensor, and W-phase running current sensor) that detect the three-phase generating current, i.e., U-phase generating current, V-phase generating current, and W-phase generating current, that flows between the running inverter 1b and the generator.

The ECU 2 is a control circuit mounted on the ECU board B1 (printed circuit board) and controls the gate driver 3. In other words, the ECU 2 is a feedback control circuit that generates drive control commands to be supplied to the gate driver 3 based on detection signals indicating the operating states of the step-up/step-down converter 1a, the driving inverter 1b, and the power generation inverter 1c.

The detection signals are output signals from the various sensors described above. In other words, the ECU 2 is a software control circuit that generates drive control commands by processing information from the primary voltage signal, secondary voltage signal, reactor current signal, U-phase running current signal, V-phase running current signal, W-phase running current signal, U-phase generated current signal, V-phase generated current signal, and W-phase generated current signal, as well as control commands input from a higher-level control device, using a pre-stored driving control program.

The gate driver 3 is a drive circuit mounted on the GD board B2 (printed circuit board). This gate driver 3 includes a step-up/step-down drive IC 3a, a running drive IC 3b, and a power generation drive IC 3c. The step-up/step-down drive IC 3a generates multiple gate signals that drive the switching transistors of the step-up/step-down converter 1a ON/OFF and outputs them to the step-up/step-down converter 1a.

The driving IC 3b generates multiple gate signals that drive each switching transistor of the driving inverter 1b ON/OFF and outputs them to the driving inverter 1b. The power generation driving IC 3c generates multiple gate signals that drive each switching transistor of the power generation inverter 1c ON/OFF and outputs them to the power generation inverter 1c.

Each gate signal generated by the gate driver 3 is a PWM signal that sets the duty ratio of the ON/OFF operation of each switching transistor of the step-up/step-down converter 1a, each switching transistor of the running inverter 1b, and each switching transistor of the power generation inverter 1c based on the drive control command input from the ECU 2.

The gate driver 3 is a circuit that generates various gate signals, which are signals with relatively large amplitudes, and can therefore be considered a large signal circuit. In contrast, the various sensors described above are electronic components that supply detection signals, which are signals with relatively small amplitudes, to the ECU 2, and can therefore be considered, together with the ECU 2, as small signal circuits.

Next, a power supply system of the drive control device A will be described with reference to FIG.
2, in the drive control device A, a small signal power supply SVCC and a drive power supply IGA are supplied from an ECU board B1 to a GD board B2. The small signal power supply SVCC is a power supply for small signal circuits (e.g., for a current sensor), and the drive power supply IGA is a power supply for the drive circuits, that is, the step-up/step-down drive IC 3a, the running drive IC 3b, and the power generation drive IC 3c.

The ECU board B1 and the GD board B2 are housed in a housing (not shown) in a parallel facing state, and are interconnected by a BtoB connector B3. A system power supply 11 and a tracker IC 12 are mounted on the ECU board B1, and the system power supply 11 generates a small signal power supply SVCC, a drive power supply, and an IGA. This system power supply 11 corresponds to the external power supply of the present invention. The tracker IC 12 is a power supply circuit that relays the power supply of the small signal power supply SVCC.

Of the various sensors of the PCU 1 described above, seven current sensors, namely the U-phase running current sensor 4, the V-phase running current sensor 5, the W-phase running current sensor 6, the U-phase generating current sensor 7, the V-phase generating current sensor 8, the W-phase generating current sensor 9, and the reactor current sensor 10, are mounted on the GD board B2 in the same manner as the gate driver 3, as shown in the figure. These seven current sensors are supplied with power from the small signal power supply SVCC from the ECU board B1 via the BtoB connector B3.

Here, the GD board B2 is provided with a power supply terminal T that corresponds to the terminal configuration of the BtoB connector B3 and is used to supply the small signal power supply SVCC to the seven current sensors. The BtoB connector B3 and the power supply terminal T are provided with a power supply terminal and a GND terminal (ground terminal) for each current sensor so that the small signal power supply SVCC is supplied to the seven current sensors with redundancy.

That is, the BtoB connector B3 and the power supply terminal T of the GD board B2 are connected to the system power supply 11 (external power supply) of the ECU board B1 to provide redundancy, and each has a total of seven power supply terminals and a total of seven GND terminals (ground terminals). The small signal power supply SVCC is supplied from the ECU board B1 to the GD board B2 in a redundant state via the BtoB connector B3 and the power supply terminal T.

The U-phase running current sensor 4 is a current sensor that detects the U-phase current of the three-phase AC current that is the output current of the running inverter 1b, and outputs a U-phase running current signal (small signal) that indicates the magnitude of the U-phase current. The V-phase running current sensor 5 is a current sensor that detects the V-phase current of the three-phase AC current that is the output current of the running inverter 1b, and outputs a V-phase running current signal (small signal) that indicates the magnitude of the V-phase current.

The W-phase running current sensor 6 is a current sensor that detects the W-phase current of the three-phase AC current that is the output current of the running inverter 1b, and outputs a W-phase running current signal (small signal) that indicates the magnitude of the W-phase current. The U-phase generating current sensor 7 is a current sensor that detects the U-phase current of the three-phase AC current that is the input current of the generating inverter 1c, and outputs a U-phase generating current signal (small signal) that indicates the magnitude of the U-phase current.

The V-phase generating current sensor 8 is a current sensor that detects the V-phase current of the three-phase AC current that is the input current of the power generation inverter 1c, and outputs a V-phase generating current signal (small signal) that indicates the magnitude of the V-phase current. The W-phase generating current sensor 9 is a current sensor that detects the W-phase current of the three-phase AC current that is the input current of the power generation inverter 1c, and outputs a W-phase generating current signal (small signal) that indicates the magnitude of the W-phase current.

The reactor current sensor 10 is a current sensor that detects the current (reactor current) flowing through the reactor of the step-up/step-down converter 1a, and outputs a reactor current signal (small signal) that indicates the magnitude of the reactor current.

For the small signal power supply SVCC power supply system for these seven current sensors, the gate driver 3, which is also mounted on the GD board B2, is supplied with power from a drive power supply IGA generated separately by the system power supply 11 via a BtoB connector B3. This drive power supply IGA is a separate power supply from the small signal power supply SVCC described above, and is a dedicated power supply for the gate driver 3, which is the drive circuit.

3 shows a power supply circuit of the small signal power supply SVCC in the GD board B2. On the GD board B2, small signal power supply patterns P4S, P5S, P6S, P7S, P8S, P9S, P10S and small signal GND patterns P4G, _P5G , P6G, _P7G , P8G, P9G, _P10G are formed for each of the U-phase running current sensor 4, the V-phase running current sensor 5, the W-phase running current sensor 6, the U-phase generating current sensor ₇ , the V _{- phase generating} current sensor ₈ , the W-phase generating current sensor ₉ , and _the reactor current _{sensor 10} , so as to supply _the small _signal power supply SVCC _to each current sensor individually.

Of these small signal power supply patterns _P4S , _P5S , _P6S , P7S, _P8S , _P9S , _P10S and small signal GND patterns _P4G , _P5G , _P6G , P7G, _P8G , _P9G , _{P10G , the small signal power supply patterns P4S, P5S, P6S, P7S, P8S, P9S, P10S correspond to the first power supply} wiring in _the present invention, and the small signal GND patterns _P4G , _P5G , _P6G , _P7G , _{P8G , P9G , P10G} correspond to the first ground wiring in the present invention.

Of these small signal power supply patterns _P4S , _P5S , _P6S , _P7S , _P8S , _P9S , _P10S and small signal GND patterns _P4G , _P5G , _P6G , _P7G , _P8G , _P9G , _P10G , the small signal power supply pattern _P4S and the small signal GND pattern _P4G supply the small signal power supply SVCC to the U-phase running current sensor 4, the small signal power supply pattern _P5S and the small signal GND pattern _P5G supply the small signal power supply SVCC to the V-phase running current sensor 5, and the small signal power supply pattern _P6S and the small signal GND pattern _P6G supply the small signal power supply SVCC to the W-phase running current sensor 6.

The small signal power supply pattern _P7S and the small signal GND pattern _P7G supply the small signal power supply SVCC to the U-phase generated current sensor 7, the small signal power supply pattern _P8S and the small signal GND pattern _P8G supply the small signal power supply SVCC to the V-phase generated current sensor 8, and the small signal power supply pattern _P9S and the small signal GND pattern _P9G supply the small signal power supply SVCC to the W-phase generated current sensor 9. Furthermore, the small signal power supply pattern _P10S and the small signal GND pattern _P10G supply the small signal power supply SVCC to the reactor current sensor 10 of the step-up/step-down converter 1a.

Of these small signal power supply patterns _P4S , _P5S , _P6S , _P7S , _P8S , _P9S , _P10S and small signal GND patterns _P4G , _P5G , _P6G , _P7G , P8G, _P9G , _P10G , capacitors _C4 to _C10 are provided between the small signal GND patterns _P4G , _P5G , _P6G , _P7G , _P8G , _P9G , _P10G and the GND (ground potential) of the drive power supply _IGA , respectively.

That is, the capacitor _C4 has one end connected to the small signal GND pattern _P4G and the other end connected to the GND (ground potential) of the drive power supply IGA. The capacitor _C5 has one end connected to the small signal GND pattern _P5G and the other end connected to the GND (ground potential) of the drive power supply IGA. The capacitor _C6 has one end connected to the small signal GND pattern _P6G and the other end connected to the GND (ground potential) of the drive power supply IGA.

The capacitor _C7 has one end connected to the small signal GND pattern _P7G and the other end connected to the GND (ground potential) of the drive power supply IGA. The capacitor _C8 has one end connected to the small signal GND pattern _P8G and the other end connected to the GND (ground potential) of the drive power supply IGA.

The capacitor _C9 has one end connected to the small signal GND pattern _P9G and the other end connected to the GND (ground potential) of the drive power supply IGA. The capacitor _C10 has one end connected to the small signal GND pattern _P10G and the other end connected to the GND (ground potential) of the drive power supply IGA.

Capacitors C4b to C10b are provided between the small signal power supply patterns _P4S , _P5S , _P6S , _P7S , _P8S , _P9S , _P10S and the small signal GND patterns _P4G , _P5G , _P6G , _P7G , _P8G , _P9G , _P10G , respectively. These capacitors _C4b to _C10b are bypass capacitors connected in parallel to the U- _phase running current sensor ₄ , the V-phase running current sensor 5, the W-phase running current sensor 6, the U-phase generated current sensor 7, the V-phase generated current sensor 8, the W-phase generated current sensor 9 and the reactor current sensor 10, respectively.

That is, one end of the capacitor _C4b is connected to the small signal power supply pattern _P4S and the other end is connected to the small signal GND pattern _P4G . One end of the capacitor _C5b is connected to the small signal power supply pattern _P5S and the other end is connected to the small signal GND pattern _P5G . One end of the capacitor _C6b is connected to the small signal power supply pattern _P6S and the other end is connected to the small signal GND pattern _P6G .

The capacitor _C7b has one end connected to the small signal power supply pattern _P7S and the other end connected to the small signal GND pattern _P7G . The capacitor _C8b has one end connected to the small signal power supply pattern _P8S and the other end connected to the small signal GND pattern _P8G . The capacitor _C9b has one end connected to the signal power supply pattern _P9S and the other end connected to the small signal GND pattern _P9G . The capacitor _C10b has one end connected to the signal power supply pattern _P10S and the other end connected to the small signal GND pattern _P10G .

These capacitors _C4 to _C10 , _C4b to _C10b are circuit elements for reducing the effect of power supply noise on the U-phase running current sensor 4, the V-phase running current sensor 5, the W-phase running current sensor 6, the U-phase generated current sensor 7, the V-phase generated current sensor 8, the W-phase generated current sensor 9 and the reactor current sensor 10.

In other words, the capacitors _C4 to _C10 reduce the impedance of the small signal GND patterns _P4G , _P5G , _P6G , _P7G , _P8G , _P9G , and _P10G , thereby reducing fluctuations in the current detection signal caused by voltage fluctuations in the small signal GND patterns _P4G , _P5G , _P6G , _P7G , _P8G , _P9G , and _P10G .

On the other hand, capacitors _C4b to _C10b suppress the flow of power supply noise into the U-phase running current sensor 4, the V-phase running current sensor 5, the W-phase running current sensor 6, the U-phase generated current sensor 7, the V-phase generated current sensor 8, the W-phase generated current sensor 9 and the reactor current sensor 10, thereby reducing fluctuations in the current detection signal caused by power supply noise.

Furthermore, on the GD substrate B2, in addition to the small signal power supply patterns _P4S , _P5S , _P6S , _P7S , _P8S , _P9S , _P10S and small signal GND patterns _P4G , _P5G , _P6G , _P7G , _P8G , _P9G , _P10G , drive power supply patterns _PaS , _PbS , _PcS and drive GND patterns _PaG , _PbG , _PcG are formed.

Of these driving power supply patterns _PaS , _PbS , _PcS and driving GND patterns _PaG , _PbG , _PcG , the driving power supply patterns _PaS , _PbS , _PcS correspond to the second power supply wiring in the present invention, and the driving GND patterns _PaG , _PbG , _PcG correspond to the second ground wiring in the present invention.

A drive power supply IGA is supplied to the gate driver 3 via drive power supply patterns P _aS , P _bS , P _cS and drive GND patterns P _aG , P _bG , P _cG . As shown in the figure, the GD board B2 is also provided with separate power supply patterns and GND patterns for the above-mentioned primary and secondary voltage sensors.

Next, the effects of the drive control device A according to this embodiment will be described in detail with reference to Figures 4 and 5.

First, in this drive control device A, as shown in FIG. 2, the small signal power supply SVCC is individually supplied from the ECU board B1 to the U-phase running current sensor 4, V-phase running current sensor 5, W-phase running current sensor 6, U-phase generating current sensor 7, V-phase generating current sensor 8, W-phase generating current sensor 9, and reactor current sensor 10 on the GD board B2, so that redundancy in the power supply to each current sensor can be ensured.

For example, if a power supply failure occurs to the U-phase running current sensor 4 due to poor contact of the connector 13, the small signal power supply SVCC normally supplies power to the other V-phase running current sensor 5, W-phase running current sensor 6, U-phase generating current sensor 7, V-phase generating current sensor 8, W-phase generating current sensor 9, and reactor current sensor 10.

In other words, with this drive control device A, even if a power supply failure occurs in any of the seven current sensors, it is possible to operate the current sensors other than the current sensor with the power supply failure normally. As a result, it is possible to ensure redundancy in the power supply to multiple current sensors (small signal circuits).

Furthermore, in this drive control device A, as shown in FIG. 3, capacitors C4 to C10 are provided between the _small signal GND patterns _P4G , _P5G , _P6G , _P7G , _P8G , _P9G , and _P10G and the GND (earth potential) of the drive power supply _IGA , so that it is possible to reduce the impedance with each of the small signal GND patterns _P4G , _P5G , _P6G , _P7G , _P8G , _P9G , and _P10G .

In other words, with this drive control device A, it is possible to reduce fluctuations in the current detection signal caused by voltage fluctuations in the small signal GND patterns _P4G , _P5G , _P6G , _P7G , _P8G , _P9G , _{P10G ,} in other words, it is possible to suppress a decrease in the noise resistance _of the U-phase running current sensor 4, _{V - phase} running current sensor 5, W _- phase running current sensor 6, U-phase generated current sensor 7, V-phase generated current sensor 8, W-phase generated current sensor 9 and reactor current sensor ₁₀ caused by an increase in impedance with the small signal GND patterns P4G, P5G, P6G, P7G, P8G, P9G, P10G.

Therefore, according to this embodiment, it is possible to provide a drive control device A that can suppress a decrease in noise resistance in multiple current sensors (small signal circuits) while ensuring redundancy in the power supply to the multiple current sensors (small signal circuits).

In addition, according to this drive control device A, capacitors C4 to C10 are provided between the small signal GND patterns _P4G , _P5G , _P6G , _P7G , _P8G , _P9G , _P10G and the GND (earth potential) of the drive power supply _IGA , that is, between the small signal GND patterns _P4G , _P5G , _P6G , _P7G , _P8G , _P9G , _P10G and the drive signal GND patterns _PaG , _PbG , _PcG , so that it is possible to suppress a _decrease in noise resistance for all of the U-phase running current sensor 4, V-phase running current sensor 5, W-phase running current sensor 6, U-phase generated current sensor 7, V-phase generated current sensor 8, W-phase generated current sensor 9 and reactor current sensor 10.

The present invention is not limited to the above-described embodiment, and the following modifications are possible.
(1) In the above embodiment, the present invention has been described as being applied to the drive control device A that drives and controls the PCU 1, but the present invention is not limited to this. The present invention can be applied to any circuit that includes a drive circuit that receives a drive power supply via a first power supply wiring and a first ground wiring and generates a predetermined drive signal based on the drive power supply, and a small signal circuit that receives a small signal power supply via a second power supply wiring and a second ground wiring and generates a control signal for controlling the drive circuit based on the small signal power supply.

(2) In the above embodiment, the present invention has been described as being applied to the supply of power from the small signal power supply SVCC to multiple current sensors (small signal circuits), but the present invention is not limited to this. For example, the small signal circuits to which the small signal power supply SVCC supplies power are not limited to multiple current sensors, i.e., the U-phase running current sensor 4, the V-phase running current sensor 5, the W-phase running current sensor 6, the U-phase generating current sensor 7, the V-phase generating current sensor 8, the W-phase generating current sensor 9, and the reactor current sensor 10.

(3) In the above embodiment, the small signal power supply SVCC was supplied individually to each of the multiple small signal circuits on the GD board B2, i.e., the U-phase running current sensor 4, the V-phase running current sensor 5, the W-phase running current sensor 6, the U-phase generating current sensor 7, the V-phase generating current sensor 8, the W-phase generating current sensor 9, and the reactor current sensor 10, but the present invention is not limited to this.

For example, a power supply system to a U-phase running current sensor 4, a V-phase running current sensor 5, a W-phase running current sensor 6, a U-phase generating current sensor 7, a V-phase generating current sensor 8, a W-phase generating current sensor 9, and a reactor current sensor 10 as shown in FIG. 6 is considered.

For example, in the wiring method shown in FIG. 6(a), the ECU board B1 supplies the small signal power supply SVCC to the four current sensors 4-6, 10 individually, and the remaining three current sensors 7-9 are not supplied with the small signal power supply SVCC from the ECU board B1, but are supplied with the small signal power supply SVCC by branching the power supply pattern and GND pattern between the connector 23 and the four current sensors 4-6, 10 within the GD board B2.

As shown in the figure, the branching manner of the power supply pattern and GND pattern is such that the power supply pattern and GND pattern between the connector 23 and the current sensor 4 are branched to supply the small signal power supply SVCC to the current sensor 7, the power supply pattern and GND pattern between the connector 23 and the current sensor 5 are branched to supply the small signal power supply SVCC to the current sensor 8, and the power supply pattern and GND pattern between the connector 23 and the current sensor 6 are branched to supply the small signal power supply SVCC to the current sensor 9, but the branching manner is not limited to this.

In addition, in the wiring method shown in FIG. 6(b), the small signal power supply SVCC is supplied from the ECU board B1 to the three current sensors 4-6 individually, and the remaining four current sensors 7-10 are supplied with the small signal power supply SVCC by branching the power supply pattern and GND pattern between the connector 23 and the three current sensors 4-6 within the GD board B2.

The branching manner of the power supply pattern and GND pattern is, for example, as shown in FIG. 6(b), where the power supply pattern and GND pattern between the connector 23 and the current sensor 4 are branched to supply the small signal power supply SVCC to the two current sensors 7 and 10, the power supply pattern and GND pattern between the connector 23 and the current sensor 5 are branched to supply the small signal power supply SVCC to the current sensor 8, and the power supply pattern and GND pattern between the connector 23 and the current sensor 6 are branched to supply the small signal power supply SVCC to the current sensor 9, but the branching manner is not limited to this.

This wiring method takes into consideration the fact that, of the three power converters, namely the step-up/step-down converter, the driving inverter, and the power generation inverter, the redundancy of the power supply to the current sensors 4-6 that detect the output current of the step-up/step-down converter is more important than the redundancy of the power supply to the other four current sensors 7-10.

In other words, in the case of PCU1, the driving inverter that is directly related to driving the driving motor M is more important than the other step-up/step-down converters and power generation inverters. Therefore, there may be cases where the current sensors 4 to 6 that detect the output current of the more important driving inverter are given priority for redundancy, and the other four current sensors 7 to 10 are not provided with redundant power supply. With this in mind, the power supply terminal of the present invention is configured so that a small signal power supply is supplied to at least three driving current sensors with redundancy.

(4) In the above embodiment, the capacitors C4 to C10 are provided between the small signal GND patterns _P4G , _P5G , _P6G , _P7G , _P8G , _P9G , and _P10G and the GND (ground potential) _of the drive power supply _IGA , that is, between the small signal GND patterns _P4G , _P5G , _P6G , _P7G , _P8G , _P9G , and _P10G and the drive signal GND patterns _PaG , _PbG , and _PcG , respectively, but the present invention is not limited to this.

That is, instead of providing capacitors _C4 to _C10 in all of the small signal GND patterns _P4G , _P5G , _P6G , _P7G , _P8G , _P9G , and _P10G , capacitors may be provided in some of the small signal GND patterns _P4G , _P5G , _P6G , _P7G , _P8G , _P9G , and _P10G .

A Drive control device B1 ECU board B2 GD board B3 BtoB connector _P4S , _P5S , _P6S , _P7S , _P8S , _P9S , _P10S small signal power supply _{pattern P4G, P5G, P6G, P7G, P8G, P9G, P10G small signal GND pattern PaS , PbS , PcS} drive signal power supply pattern _PaG , _PbG , _PcG drive signal GND pattern T Power supply terminal 1 PCU (power control unit)
2 ECU2
3 Gate driver 3a Step-up/step-down driver IC
3b Travel drive IC
3c Power generation drive IC
4 U-phase running current sensor 5 V-phase running current sensor 6 W-phase running current sensor 7 U-phase generated current sensor 8 V-phase generated current sensor 9 W-phase generated current sensor 10 Reactor current sensor 11 System power supply 12 Tracker IC

Claims (4)

a power supply terminal connected to an external power supply so as to have redundancy;
a plurality of small signal circuits to which a small signal power supply input to the power supply terminal is supplied via a first power supply wiring and a first ground wiring;
a drive circuit that receives a drive power source through a second power supply wiring and a second ground wiring and generates a predetermined drive signal based on the drive power source;
a capacitor connected to the first ground wiring and the second ground wiring ;
The drive control device, wherein the capacitor is provided for each of the second ground wirings, the second ground wirings being provided in a plurality of portions corresponding to the plurality of small signal circuits . the small signal circuit is a current sensor that detects an output current of a three-phase inverter;
2. The drive control device according to claim 1, wherein the drive circuit is a gate driver that generates a gate signal for controlling the three-phase inverter . the small signal circuit comprises three driving current sensors each detecting an output current of a three-phase drive inverter that drives a driving motor; three generated current sensors each detecting an input current of a three-phase power generating inverter that converts three-phase AC power input from a generator into DC power; and a reactor current sensor that is provided between a battery and the three-phase drive inverter and the three-phase power generating inverter and detects a reactor current of a step-up/step-down converter that boosts the DC power input from the battery and outputs it to the three-phase drive inverter, while stepping down the DC power input from the three-phase drive inverter and/or the three-phase power generating inverter and outputs it to the battery;
3. The drive control device according to claim 1, wherein the drive circuit is a gate driver that generates gate signals for controlling the drive three-phase inverter, the power generation three-phase inverter, and the step-up/step-down converter . 4. The drive control device according to claim 3 , wherein the power supply terminal is configured so that the small signal power supply is supplied to at least the three traveling current sensors in a redundant state .

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