JP4198721B2 - Power conversion device and rotating electrical machine device - Google Patents

Description

  The present invention relates to an improvement of a power conversion device and a rotating electrical machine device.

  In general, switching control of a power conversion device controls electric power supplied to an armature by turning on / off a switching element based on electrical angle information of a rotor of a motor generator. When noise is superimposed on the signal of the rotation angle sensor, an error occurs in the electrical angle information, and the on / off control signal of the switching element malfunctions. For this reason, in order to reduce the influence of electromagnetic noise on the rotation angle sensor, electromagnetic shielding is performed. In addition, there is one that reads electrical angle information that is not affected by switching noise by synchronizing the timing of reading the resolver output, which is electrical angle information of the rotor, with the switching cycle of the inverter circuit (for example, Patent Documents). 1).

JP-A-2004-364460 (paragraph numbers 0031 to 0033 and FIG. 1)

The conventional power conversion device is configured as described above, and in the case of performing electromagnetic shielding, extra parts are required, which increases the installation space and weight. In addition, in order to synchronize the timing to read the resolver output and the switching cycle of the inverter circuit, it reads electrical angle information that is not affected by switching noise, but the switching cycle is constant as in rectangular wave control. It was difficult to control a system that was not.
The present invention has been made in view of the above-described problems, and does not increase the installation space and weight, and is easily affected by electromagnetic noise during switching operation and easily controlled. The object is to obtain a device.

In the power converter according to the present invention, an electrical angle detection means for detecting electrical angle information of a rotating electrical machine having a field winding, a field switching element for opening and closing a current supplied to the field winding, Armature switching signal generating means for generating an armature switching signal based on the angle information, an armature switching element for opening and closing a current flowing through the armature of the rotating electric machine based on the armature switching signal, an armature switching element and a field Switching operation detecting means for detecting a change in the operating state of the magnetic switching element, and when the switching operation detecting means detects a change in the operating state of the armature switching element or the field switching element, Electrical angle information detected before the operating state of the magnetic switching element changes Those having an armature switching signal holding means for holding between a child switching signal of a predetermined holding time.

  A rotating electrical machine apparatus according to the present invention is an assembly of the power converter and the rotating electrical machine.

The present invention relates to an electrical angle detection means for detecting electrical angle information of a rotating electrical machine having a field winding, a field switching element for opening and closing a current supplied to the field winding, and an armature based on the electrical angle information Armature switching signal generating means for generating a switching signal, armature switching element for opening and closing the current flowing through the armature of the rotating electric machine based on the armature switching signal, and the operation of the armature switching element and the field switching element Switching operation detection means for detecting a change in state, and operation of the armature switching element or field switching element when the switching operation detection means detects a change in operating state of the armature switching element or field switching element The electrical angle information detected before the state changes or the generated armature switching signal Since a armature switching signal holding means for holding during the retention time, easy power conversion device of the control without the influence of electromagnetic noise during switching operation of the switching element and the field winding switching element armature Can be obtained.

In addition, since the rotating electrical machine apparatus according to the present invention integrates the power converter and the rotating electrical machine, the electrical angle information and the armature switching signal are retained to prevent malfunction and to operate stably. A rotating electrical machine device can be obtained.

Embodiment 1 FIG.
1 to 4 show a first embodiment for carrying out the present invention, FIG. 1 is a configuration diagram showing a configuration of a power converter, FIG. 2 is a configuration diagram of an armature switching signal generation circuit, FIG. 3 is a flowchart showing the operation of the armature switching signal generation circuit, and FIG. 4 is a waveform diagram of the armature switching signal. In FIG. 1, a motor generator 2 is connected to a power converter 1. A power converter 1 as a power converter includes an armature switching signal generation circuit 11, an armature drive circuit 12, a field switching signal generation circuit 13, and a field drive circuit 14.

As shown in FIG. 2, the armature switching signal generation circuit 11 includes a resolver digital converter 111, an electrical angle information storage unit 112, an armature switching control signal generation unit 113 as an armature switching signal generation unit, and a switching operation determination unit 115. And a timer 117 as a holding time determining means. The armature drive circuit 12 that is a switching operation detection means has switching elements 121 to 126 that are switching elements for armature, and is based on electrical angle information from the angle sensor 21 of the motor generator 2 as shown in FIG. Armature switching signals (UH, UL, VH, VL, WH, WL) are generated to control the rotation speed of the motor generator 2 as a rotating electric machine. The electrical angle information storage means 112 and the armature switching control signal generation means 113 are the armature switching signal holding means in this invention, and the armature switching control signal generation means is the armature switching element control means. The armature drive circuit 12 converts the electric power supplied from the DC power source 3 into DC / AC and energizes the armature winding 22.

  The field drive circuit 14 includes a switching element 141 that is a field switching element. The field switching signal generation circuit 13 performs switching control of the field drive circuit 14 by the field switching signal FH whose duty is controlled so as to obtain a desired field current, and applies the field current to the field winding 23. .

  In this embodiment, a motor generator having a field winding is shown as an example, but a motor generator using a permanent magnet as a field magnet can be similarly configured. As a method for converting the signal of the angle sensor 21 into electrical angle information, in this embodiment, a resolver is used as the angle sensor 21 and the armature switching signal generation circuit 11 converts it into electrical angle information. A digital converter 111 (FIG. 2) is used.

  Next, details of the operation will be described with reference to the flowchart of FIG. In step S21, the switching operation determination unit 115 determines whether or not the conduction state of the switching elements 121 to 126, 141 has changed, for example, based on a control signal for controlling the switching elements 121 to 126, 141 at predetermined time intervals. To do. If it is determined in step S21 that the conduction state has changed, the timer 117 whose operation time limit is set to a predetermined value is started in step S22. In step S23, the electrical angle information storage means 112 is switched to the switching elements 121 to 121. Electrical angle information ANG1 that is not affected by noise immediately before the state of conduction of 126, 141 changes is stored as electrical angle information for switching control.

  In step S24, the armature switching control signal generating means 113 generates an armature switching signal based on the electrical angle information ANG1 stored in the electrical angle information storage means 112, and the motor generator 2 is connected via the armature drive circuit 12. Control. Thus, the armature switching signal is generated based on the electrical angle information ANG1 immediately before the switching operation, that is, the armature switching signal immediately before the switching element performs the switching operation is held for a predetermined time, and the armature immediately before this Since the switching elements 121 to 126, 141 are controlled based on the switching signal, it is possible to eliminate the possibility of erroneous control based on the affected electrical angle information even if electromagnetic noise occurs during the switching operation. .

  In step S21, when it is determined that there is no change in the conduction state of the switching elements 121 to 126, 141, it is determined in step S25 whether or not the timer 117 is operating. If it is operating, the process returns to step S21. Step S21 and subsequent steps are repeated. If it is determined in step S25 that the timer is not in operation, the electrical angle information ANG1 is replaced with the latest electrical angle information PHASE in step S26, and the armature switching control signal generating means 113 goes to step S24 and the armature switching control signal generating means 113 An armature switching signal is generated based on the angle information PHASE. If the time set in the timer 117 has passed, it is determined in step S25 that the timer 117 has stopped, the process proceeds to step S26, and the normal control is performed.

In this embodiment, as an example of the armature switching signal holding means for holding the armature switching signal for a predetermined holding time, the electrical angle information storage means 112, the armature switching control signal generation means 113, The armature switching signal storage means for storing the armature switching signal generated before the switching element performs the switching operation instead of storing the electrical angle information ANG1 before the switching operation is shown. Even if it provides, the same effect is produced.

  As described above, according to this embodiment, the armature switching signal is generated based on the electrical angle information before the switching operation for a predetermined time, that is, the armature switching signal is held for the predetermined time. Since the motor generator is controlled based on the armature switching signal, it is possible to obtain a power converter that can be easily controlled without being affected by electromagnetic noise during the switching operation of the armature and field switching elements. . Further, since an additional device such as an electromagnetic shield device for shielding electromagnetic noise during the switching operation is not required, the installation space and weight are not increased.

Embodiment 2. FIG.
5 and 6 show the second embodiment of the present invention. FIG. 5 is a configuration diagram of the armature switching signal generation circuit, and FIG. 6 is a flowchart showing the operation of the armature switching signal generation circuit. In FIG. 5, the armature switching signal generation circuit 21 includes an operation time limit setting unit 211 and a timer 212. The operation time limit setting means 211 and the timer 212 are holding time determination means in the present invention. Since other configurations are the same as those of the first embodiment shown in FIG. 1, the same reference numerals are given to the corresponding components and the description thereof is omitted.

  Next, the operation will be described with reference to the flowchart of FIG. In FIG. 6, in step S31, the timer 212 determines a timer set value DELAY1 corresponding to the angular velocity VEL and sets it in the timer 212, and starts the timer in step S22. Other operations are the same as those described in the first embodiment. In this embodiment, the operation time limit setting unit 211 determines the timer set value DELAY1 corresponding to the angular velocity VEL in step S31. Specifically, when the angular velocity VEL is fast, the timer set value DELAY1 is shortened, and when the angular velocity VEL is slow, the timer set value DELAY1 is set long. Accordingly, when the switching elements 121 to 126 and 141 are controlled, it is possible to prevent the switching elements 121 to 126 and 141 from being affected by electromagnetic noise generated when the switching elements 121 to 126 and 141 perform a switching operation.

  If the time for holding the armature switching control signal is constant, it is necessary to set the time so that the influence of electromagnetic noise does not affect the electrical angle information in all situations. For example, in the case of a power running state by rectangular wave energization control If the electric angular velocity of the rotary motor is low, the energy stored in the armature winding is large, and the influence of electromagnetic noise on the electric angle information is large, so the time to hold the armature switching control signal is long, but it rotates in reverse If the electric angular velocity of the electric motor is high, the energy stored in the armature winding is small and the time for holding the armature switching control signal can be shortened. Also, it is better that the angle of actual displacement while holding the armature switching control signal is small, and when the electrical angular speed is low (high electromagnetic noise), the time for holding the armature switching control signal is lengthened and the speed is high. In some cases (small electromagnetic noise), the armature switching control signal accuracy is improved by making the holding time variable according to the electrical angular velocity, such as shortening the time for holding the armature switching control signal. It can be improved.

Embodiment 3 FIG.
7 and 8 show the third embodiment of the present invention. FIG. 7 is a configuration diagram of the armature switching signal generation circuit, and FIG. 8 is a flowchart showing the operation of the armature switching signal generation circuit. In FIG. 7, the armature switching signal generation circuit 31 includes an operation time limit setting unit 311, a timer 312, and a switching operation determination unit 315. The operation time limit setting means 311 and the timer 312 are holding time determination means in the present invention. Since other configurations are the same as those of the first embodiment shown in FIG. 1, the same reference numerals are given to the corresponding components and the description thereof is omitted.

  Next, the operation will be described with reference to the flowchart of FIG. In FIG. 8, the switching operation determining means 315 determines in step S41 whether or not the switching element whose state has changed is for an armature. If the switching element is for an armature, the operation time limit setting means 311 sets the timer 312 in step S42. The first time period suitable for the switching element is set. In step S43, the operation time limit setting unit 311 sets the timer 312 to the second time period suitable for the field switching element, assuming that the switching element whose state has changed in step S41 is not for the armature and is for field use. . As described above, the timer can be set with an appropriate time period that can avoid the influence of both the armature and field electromagnetic noises in accordance with the switching element whose state has changed, and the stability of the control can be improved. .

  In addition, since the magnitude of electromagnetic noise generated when the armature switching element is turned on / off is different from that when the field switching element is turned on / off, the armature switching control signal is held. The accuracy of the armature switching control can be improved by changing the time according to the switching element whose operating state has changed.

Embodiment 4 FIG.
9 to 11 show a fourth embodiment of the present invention. FIG. 9 is a configuration diagram of the armature switching signal generation circuit, and FIGS. 10 and 11 are flowcharts showing the operation of the armature switching signal generation circuit. It is. In FIG. 9, the armature switching signal generation circuit 41 includes a switching operation determination unit 315, an operation time limit setting unit 411, a timer 412, and a motor generator state determination unit 416. The operation time limit setting means 411 and the timer 412 are holding time determination means in the present invention. Since other configurations are the same as those of the embodiment shown in FIG. 7, the same reference numerals are given to the corresponding components and the description thereof is omitted.

  Next, the operation will be described with reference to the flowcharts of FIGS. In FIG. 10, the operation of setting the operation time limit of the timer 412 in step S50 is different from the embodiment shown in FIGS. Step S50 will be described with reference to the flowchart of FIG. In step S51, the switching operation determination means 315 determines whether or not the switching element whose state has changed is for an armature. If the switching element is for an armature, the motor generator state determination means 416 determines whether the motor generator 2 is in a power running state in step S52. Judge whether or not.

  If the motor generator 2 is in the power running state in step S52, the operation time limit setting means 411 sets the timer 412 to the first time period suitable for the armature switching element in step S53. If it is not in the power running state in step S52, it is determined in step S54 whether or not it is in the power generation (regeneration) state. If it is in the power generation state, in step S55, the operation time setting means 411 sets the timer 412 to a switching element suitable for armature. Set to 2 time periods. If it is not in the power generation state in step S54, the process returns to step S51.

  In step S51, the switching operation determining means 315 determines that the switching element whose state has changed is not for the armature and is for the field, and goes to step S56. In step S56, the motor generator state determining means 416 determines whether or not the motor generator 2 is in the power running state. If the motor generator 2 is in the power running state, the operation time limit setting means 411 uses the timer 412 as a field switching element in step S57. Set to the third time period. If it is not in the power running state in step S56, it is determined whether or not it is in the power generation state in step S58. If it is in the power generation state, in step S59, the operation time setting means 411 sets the timer 412 to the fourth time limit suitable for the field element switching element. Set to. If it is not in the power generation state in step S58, the process returns to step S51.

  In the operating state of the generator motor, for example, during powering, electromagnetic noise is likely to occur because the armature current is cut off, and electromagnetic noise does not occur much during power generation, so the time for holding the armature switching control signal is set to The armature switching control accuracy can be improved by changing the operating state.

Embodiment 5 FIG.
12 and 13 show the fifth embodiment of the present invention. FIG. 12 is a configuration diagram of the armature switching signal generation circuit, and FIG. 13 is a flowchart showing the operation of the armature switching signal generation circuit. In FIG. 12, the armature switching signal generation circuit 51 includes an operation state storage unit 511, an angle difference determination unit 512, and a holding release unit 513. Since other configurations are the same as those of the embodiment shown in FIG. 5, the same reference numerals are given to the corresponding components and the description thereof is omitted.

  Next, the operation will be described with reference to the flowchart of FIG. In FIG. 13, in step S21, the switching operation determination means 115 determines whether or not the conduction state of the switching elements 121-126, 141 has changed, based on a control signal for controlling the switching elements 121-126, 141 for a predetermined time. Judge by interval. If it is determined in step S21 that the conduction state has changed, in step S31, the operation time limit setting unit 211 determines the timer set value DELAY1 corresponding to the angular velocity VEL and sets it in the timer 212, and starts the timer in step S22. Go to step S51. In step S51, the operation state storage means 511 sets a flag indicating that the state change, for example, an on (ON) state or an off (OFF) state has occurred. In step S23, the electrical angle information storage means 112 stores the electrical angle information ANG1 that is not affected by noise immediately before the switching state of the switching elements 121 to 126, 141 changes, and goes to step S24.

  If the timer 212 is not in operation in step S25, it is determined in step S52 whether or not there is a state change flag. If there is a state change flag, the angle difference determination means 512 stores the previously stored electric power in step S53. When the angle information ANG1 and the latest electrical angle information ANG2 are compared and the angle difference is less than the predetermined value, the storage of the previous electrical angle information is continued in step S54, and the process goes to step S24. When the angle difference between the electrical angle information ANG1 and the latest electrical angle information ANG2 is greater than or equal to a predetermined value in step S53, the holding release unit 513 stores the electrical angle information ANG1 stored in the electrical angle information storage unit 112 in step S55. Is released. Thereby, the armature switching control signal generation means 113 generates an armature switching signal based on the latest electrical angle information ANG2, and controls the motor generator 2. That is, the holding time of the armature switching control signal is extended until the angle difference between the stored electrical angle information ANG1 and the latest electrical angle information ANG2 becomes a predetermined value or more.

  Since there is some conversion error in the process of converting the angle sensor signal to electrical angle information, the armature switching control signal may chatter at low speed rotation. Electrical angle information when changing from ON to OFF (or OFF to ON) is stored, and the angle difference between the latest electrical angle information after the set time of the timer 212 and the stored electrical angle information is stored. If is less than a certain value, the stored electrical angle information is used to generate the armature switching control signal. If the angle difference is greater than a certain value, the armature switching control signal is generated with the latest electrical angle information thereafter. By doing so, the accuracy of the armature switching control can be improved compared to the case where hysteresis is provided for the switching on / off control determination value. That.

Embodiment 6 FIG.
13 is a configuration diagram of an armature switching signal generation circuit showing Embodiment 6 of the present invention. In FIG. 13, the rotating electrical machine device 4 is obtained by integrating a power converter 1 and a rotating motor 2. If comprised in this way, since the physical distance of the rotary motor 2 and the power converter 1 is near, the influence which the electromagnetic noise of the rotary motor 2 has on the power converter 1 becomes large, but the layout of each component part And the freedom degree with respect to the electromagnetic noise shield structure of the rotary motor 2 becomes small.

  Also in the electric power converter integrated type rotating electrical machine apparatus for vehicles, for example, the armature switching control signal generation circuit 11 shown in FIG. 2 or the armature switching control signal shown in FIGS. 5, 7, 9, and 12 is used. Even if the electromagnetic shield structure is simplified or omitted by applying the generation circuits 21, 31, 41, 51, the armature switching control signal is output while the switching noise of the switching element is affected. By holding, a malfunction can be prevented and a rotating electrical machine device that operates stably can be obtained.

It is a block diagram which shows the structure of the power converter device which is Embodiment 1 of this invention. It is a block diagram of an armature switching signal generation circuit. It is a flowchart which shows operation | movement of an armature switching signal generation circuit. It is a wave form diagram of an armature switching signal. It is a block diagram of the armature switching signal generation circuit which is Embodiment 2 of this invention. It is a flowchart which shows operation | movement of an armature switching signal generation circuit. It is a block diagram of the armature switching signal generation circuit which is Embodiment 3 of this invention. It is a flowchart which shows operation | movement of an armature switching signal generation circuit. It is a block diagram of the armature switching signal generation circuit which is Embodiment 4 of this invention. It is a flowchart which shows operation | movement of an armature switching signal generation circuit. It is a flowchart which shows operation | movement of an armature switching signal generation circuit. It is a block diagram of the armature switching signal generation circuit which is Embodiment 5 of this invention. It is a flowchart which shows operation | movement of an armature switching signal generation circuit. It is a block diagram which shows the structure of the power converter device which is Embodiment 6 of this invention.

Explanation of symbols

1 power converter, 2 motor generator, 3 DC power supply,
4 Power converter integrated rotary electric machine,
11, 21, 31, 41, 51 Armature switching signal generation circuit,
111 armature switching signal generation means, 112 electrical angle information storage means,
113 armature switching control signal generating means,
115, 215, 315 Switching operation determination means, 117 timer,
211, 311, 411 operation time limit setting means, 212, 312, 412 timer,
416 motor generator state determination means, 511 operation state storage means,
512 angle difference determination means, 513 holding release means, 12 armature drive circuit,
121-126 switching elements, 13 field switching signal generation circuits,
14 field drive circuit, 141 switching element, 21 angle sensor,
22 armature windings, 23 field windings.

Claims (4)

Electrical angle detection means for detecting electrical angle information of a rotating electrical machine having a field winding, a field switching element for opening and closing a current supplied to the field winding, and an armature switching signal based on the electrical angle information An armature switching signal generating means for generating an armature, an armature switching element for opening and closing a current flowing through an armature of a rotating electric machine based on the armature switching signal, an armature switching element, and a field switching element. Switching operation detecting means for detecting a change in operating state; and when the switching operation detecting means detects a change in the operating state of the armature switching element or the field switching element, the armature switching element or the field The electrical angle information detected or generated before the operating state of the magnetic switching element changes. Power conversion device provided with an armature switching signal holding means for holding between the armature switching signal a predetermined retention time. The armature switching signal holding means determines the holding time according to which operating state of the armature switching element or the field switching element has changed. The power converter described. The armature switching signal holding means includes an angular difference between the electrical angle information of the rotating electrical machine before the operating state of the armature switching element changes and the electrical angle information of the rotating electrical machine after the holding time has elapsed. The power conversion device according to claim 1 or 2, wherein the holding time is extended until becomes equal to or greater than a set value . The rotating electrical machine apparatus which integrated the power converter device of any one of Claim 1 thru | or 3, and the said rotating electrical machine .

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