JP4153879B2 - Vehicle drive control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a railcar driving and controlling device capable of preventing the occurrence of an impulse, even if a power interruption occurs when a train is passing a section with regenerative braking operated. <P>SOLUTION: When a point detecting device 10 detects a section position in advance and when the point detection signal is inputted into a brake controlling device 7 and a power conversion controlling device 6, a regenerative braking control circuit 15 in the brake controlling device 7 reduces a regenerative braking force by a regenerative braking force command to the power conversion controlling device 6. An air braking control circuit 16 rises an air braking force command to an air braking device 8. By harmonizing the operation timing between the regenerative braking force reducing command and the air braking rising command, the total braking force of the regenerative and air braking forces is controlled so as not to change sharply. <P>COPYRIGHT: (C)2005,JPO&amp;NCIPI

Description

  The present invention relates to a vehicle drive control device.

  As shown in FIG. 4, a conventional vehicle drive control device for an AC electric vehicle includes a current collector 1, a transformer 2, an overhead line side power conversion circuit 3, and a drive side power conversion that collect current from an AC overhead line that constitutes a main circuit. A circuit 4 and an AC motor 5 are provided. Further, a power conversion control device 6, a brake control device 7, and an air brake device 8 that control the overhead wire side power conversion circuit 3 and the drive side power conversion circuit 4 are provided. The power conversion control device 6 includes a power failure detection circuit 11 that detects a power failure due to a drop in overhead voltage, a driving command input circuit 12 that outputs a power regeneration command based on a driving command / brake command from the driver's seat, and a power conversion circuit A control circuit 13 for controlling 3 and 4 is included. The power conversion device 9 includes the overhead wire side power conversion circuit 3, the drive side power conversion circuit 4, and the power conversion control device 6. The brake control device 7 has a regenerative brake control circuit 15 and an air brake control circuit 16.

  In this conventional vehicle drive control device for an AC electric vehicle, current is collected from the AC overhead wire by the current collector 1, the single-phase AC is converted to DC power by the overhead wire side power conversion circuit 3, and the drive side power conversion circuit In step 4, DC power is converted into three-phase AC power, and a plurality of induction motors 5 are driven by the three-phase AC power. Efficient power running and regenerative braking are performed by these power converters. Here, the regenerative brake operation is to generate a regenerative brake force by giving a regenerative brake force command from the brake control device 7 to the power conversion device 9 by a brake force command. The power conversion control device 9 gives a regenerative brake operation / stop signal to the brake control device 7, and the brake control device 7 switches between the regenerative brake and the air brake. Normally, a regenerative brake is mainly used as an auxiliary use in the high-speed range in order to suppress wear on the brake device.

  On the other hand, on the side of the substation equipment that supplies electric power, an AC feeder section (referred to as a “section”) is provided for each feeding distance to separate feeding sections from the transformer side. In this section, there is a method such as a switching section by a switching circuit breaker or the like, but at the timing of switching, a power interruption of about several hundred mS occurs. For example, when passing through a section during regenerative braking operation, the regenerative energy cannot be returned to the feeder side due to the power interruption period in the section. Therefore, the DC voltage rise in the power converter 9 or the overhead wire side power converter circuit 3 may increase the input-side voltage of the power conversion device 9 and cause damage to the power conversion device 9 due to overvoltage. Therefore, a power failure detection circuit 10 that quickly detects power interruption at the time of section switching and stops the operation of the power converter 9 is provided. That is, when power is interrupted when the section enters during regenerative braking, the regenerative brake is stopped by the function of the power failure detection circuit 10, and when power is restored after passing through the section, the regenerative brake stop due to power failure detection is automatically canceled. The regenerative brake operation is performed again. Since the regenerative brake does not act within the power failure detection period in this section, the regenerative brake operation / stop signal is given from the power conversion device 9 to the brake control device 7, thereby operating the air brake device 8 as a backup, The increase in distance is suppressed.

  However, in this power failure detection function, it is necessary to stop the operation promptly in order to suppress damage due to overvoltage of the power conversion device 9, but an impulse is generated due to a deviation in the operation timing of both due to the delay in starting up the air brake. It was. FIG. 5 shows the operation when the regenerative brake passes through the section. When the regenerative brake is stopped by detecting a power failure when entering the section, the air brake device 8 is activated by the change of the regenerative brake operation / stop signal, but both brake forces act as the total brake force depending on the regenerative brake and air brake operation timing. There was a period when the brake force did not occur, and an impulse was generated due to a sharp change in the braking force.

  FIG. 6 shows the operation at the time of section passage in power running. During power running, as with regenerative braking, in order to quickly stop power running by detecting a power failure due to power interruption in the section, an impulse was generated due to a sharp change in power running traction force.

  The present invention has been made in view of such a conventional technical problem, and even if power interruption occurs while passing through a section in a regenerative braking state, power interruption occurs when passing through a section during power running. An object of the present invention is to provide a vehicle drive control device that can prevent the occurrence of an impulse even if it occurs.

  A vehicle drive control device according to a first aspect of the present invention includes a main transformer that inputs and reduces a single-phase AC power from an AC overhead line to a primary side, and an overhead-side power conversion that converts the reduced single-phase secondary voltage into a DC voltage. A driving side power conversion circuit that converts a DC voltage converted by the power conversion device into a three-phase alternating current; an AC motor driven by the three-phase alternating current converted by the driving side power conversion circuit; Provided with a point detection device for detecting the location of the AC power feeding section in advance, and a brake control device for controlling the brake by switching between the electric power regenerative brake and the air brake, and the brake control device is configured to operate the electric power regenerative brake. It has a control function to switch the power regenerative brake to the air brake just before passing through the AC feeder section when the spot detector detects the spot of the AC feeder section It is characterized in.

  A vehicle drive control device according to a second aspect of the invention includes a main transformer that inputs and reduces a single-phase AC power from an AC overhead line to a primary side, and an overhead-side power conversion that converts the reduced single-phase secondary voltage into a DC voltage. A driving side power conversion circuit that converts a DC voltage converted by the power conversion device into a three-phase alternating current; an AC motor driven by the three-phase alternating current converted by the driving side power conversion circuit; And a point detection device for detecting the location of the AC feeder section in advance and detecting the location of the AC feeder section in advance when passing through the AC feeder section during powering. And a power conversion control device that controls to reduce the output torque of the drive-side power conversion circuit immediately before passing through the AC feeder section.

  According to the first aspect of the present invention, the position of the AC feeding section is detected in advance by the point detection device, and switching from the regenerative brake to the air brake is performed immediately before passing the AC feeding section. It is possible to prevent a sudden change in the total braking force due to the operation timing when the brake is started, and to suppress the impulse.

  According to the invention of claim 2, by detecting the position of the AC feeding section in advance by the point detection device and performing control to reduce the power running traction force in advance by the power conversion control device immediately before passing through the AC feeding section, A sudden change in powering traction due to powering interruption can be prevented, and impulses can be suppressed.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows the configuration of a vehicle drive control device according to one embodiment of the present invention. The vehicle drive control device according to the present embodiment includes a point detection device 10 that detects a point of an AC feeding section (section) in advance with respect to the conventional example shown in FIG. A section detection signal is input to the conversion device 9 and the brake control device 7.

  The vehicle drive control device according to the present embodiment includes a current collector 1 that collects current from an AC overhead line that constitutes a main circuit, a transformer 2, an overhead line side power conversion circuit 3, a drive side power conversion circuit 4, and an AC motor 5. Yes. Further, a power conversion control device 6, a brake control device 7, and an air brake device 8 that control the overhead wire side power conversion circuit 3 and the drive side power conversion circuit 4 are provided. The power conversion control device 6 includes a power failure detection circuit 11 that detects a power failure due to a drop in the overhead line voltage, an operation command input circuit 12 that outputs a power running regeneration command based on an operation command / brake force command from the driver's seat, and power conversion A control circuit 13 for controlling the circuits 3 and 4 is included. The power conversion device 9 includes the overhead wire side power conversion circuit 3, the drive side power conversion circuit 4, and the power conversion control device 6. The brake control device 7 has a regenerative brake control circuit 15 and an air brake control circuit 16.

  Further, the vehicle drive control device according to the present embodiment is characterized in that it detects the location of an AC feeding section (section) in advance, and sends a location detection signal to the power conversion control device 6 and the brake control device 7 of the power conversion device 9. Is provided.

  Railway vehicle drive control, that is, power conversion control and brake control, by the vehicle drive control device of the present embodiment is substantially the same as the conventional example.

  The control when passing through the section is as follows. The point detection device 10 detects the section position in advance, and inputs the point detection signal to the brake control device 7 and the power conversion control device 6. The regenerative brake control circuit 15 in the brake control device 7 throttles the regenerative brake force by the regenerative brake force command to the power conversion control device 6, and the air brake control circuit 16 side raises the air brake force command to the air brake device 8. . Control is performed so that the total braking force of the regenerative braking force and the air braking force does not change steeply by coordinating the operation timings of the regenerative braking force throttle command and the air brake starting command.

  FIG. 2 shows a vehicle drive control chart when the vehicle passes through the section by the regenerative brake by the vehicle drive control device of the present embodiment. The section point detection signal by the point detection device 10 changes the signal logic at the timing t1 immediately before the vehicle enters the section point. Based on the section point detection signal, the regenerative brake control circuit 15 of the brake control device 7 reduces the regenerative brake force at a timing synchronized with the start-up time of the air brake force command by the regenerative brake force command to the power conversion control device 6. On the power conversion control device 6 side, in accordance with the regenerative braking force command from the brake control device 7, the regenerative braking force is reduced by performing the braking force control following the regenerative braking force command. On the air brake control circuit 16 side of the brake control device 7, an air brake force command to the air brake device 8 is raised by a section point detection signal. After passing the section, the signal logic is changed again to switch from the air brake to the regenerative brake.

  In this way, by switching the braking force from the regenerative brake to the air brake just before the section, the regenerative braking is not interrupted because the total braking force is switched to the air brake when the section passes at the timing t2 to t3. Therefore, there is no sudden change in the total braking force, and the occurrence of impulses can be prevented. In addition, the point detection apparatus 10 changes a signal logic again in the timing t4 after passing a section.

  FIG. 3 shows a vehicle drive control chart when the vehicle passes through the section in the power running mode by the vehicle drive control device of the present embodiment. The section point detection signal by the point detection device 10 changes the signal logic at timing t11 immediately before entering the section point. Based on the section point detection signal, the power conversion control device 6 side reduces the power running traction force with a certain time constant. As a result, the powering traction force is reduced during the passage of the section from the timing t12 to t13, the powering traction force is not interrupted, and since there is no sharp change in the powering traction force, the occurrence of an impulse can be prevented. In this case as well, the point detection device 10 changes the signal logic again at the timing t14 after passing through the section.

1 is a circuit block diagram of one embodiment of the present invention. The control timing chart at the time of the section passage in the regenerative brake by the said embodiment. The control timing chart at the time of the section passage in the power running mode by the said embodiment. The circuit block diagram of a prior art example. The control timing chart at the time of the section passage in the regenerative brake by a prior art example. The control timing chart at the time of the section passage in the power running mode by a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Current collector 2 Transformer 3 Overhead side power conversion circuit 4 Drive side power conversion circuit 5 AC motor 6 Power conversion control device 7 Brake control device 8 Air brake device 9 Power conversion device 10 Point detection device

Claims (2)

A main transformer that inputs and reduces the single-phase AC power from the AC overhead line to the primary side,
An overhead wire side power conversion circuit that converts the stepped down single-phase secondary voltage into a DC voltage;
A drive-side power conversion circuit that converts the DC voltage converted by the power conversion device into a three-phase AC;
AC motor driven by the three-phase AC converted by the drive side power conversion circuit,
A point detection device that is provided on the vehicle and detects the point of the AC feeder section beforehand,
A brake control device that switches between electric power regenerative brake and air brake to control the brake,
The brake control device has a control function of switching the power regenerative brake to an air brake immediately before passing through the AC power feeding section when the point detecting device detects the position of the AC power feeding section during the power regeneration brake operation. A vehicle drive control device. A main transformer that inputs and reduces the single-phase AC power from the AC overhead line to the primary side,
An overhead wire side power conversion circuit that converts the stepped down single-phase secondary voltage into a DC voltage;
A drive-side power conversion circuit that converts the DC voltage converted by the power conversion device into a three-phase AC;
AC motor driven by the three-phase AC converted by the drive side power conversion circuit,
A point detection device that is provided on the vehicle and detects the point of the AC feeder section beforehand,
When passing through an AC feeder section during power running, the point detection device detects the point of the AC feeder section in advance, thereby reducing the output torque of the drive side power conversion circuit immediately before passing through the AC feeder section. A vehicle drive control device comprising a power conversion control device for controlling.

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