JPH0322801A - electric car control device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a control device for an electric vehicle, and in particular, in an inverter device, a device for detecting an abnormality in a gate control device is provided, and the output of the device is used to keep the gate closed at all times. The present invention relates to a control device that is suitable for weight reduction and allows omitting another current breaker by opening a high-speed breaker.

[Conventional technology]

According to 1985 IEE National Conference R880, VVVF Inverter Vehicle J Mitsubishi Electric, a current breaker is omitted between the current collector and the inverter controller, only a high-speed breaker is used, and the vehicle is not disconnected from the contact line even when coasting. , That is, it is a conventional technique to turn off the gate of the inverter. (However, it is unclear whether the high-speed circuit breaker is forcibly opened when a gate control abnormality occurs, as in the present invention.) [Problem to be solved by the invention] Electrical system omitting a current circuit breaker; In other words, in the current collector → high-speed breaker → control device with electric valve → drive motor,
Except for overcurrent failures, the high-speed circuit breaker is kept closed, and when the electric vehicle is coasting or stopped, the electric valve of the control device is kept closed, and even if voltage is applied to the control device, the drive motor remains closed. In a method that does not supply power to The conventional system does not take into account how to deal with an abnormal situation in which the electric valve of the control device accidentally opens when coasting or stopping, and power is supplied to the motor, and there is a risk that the electric car will start running when stopped. Ta. The purpose of the present invention is to prevent the above-mentioned abnormal running when an electric vehicle is stopped. [Means for solving the problem] The above objective is achieved by detecting that power is supplied to the drive motor and opening a high-speed breaker when the output of the master controller is not for power running or braking. It will be done. [Operation] The output of the electric valve control device that does not comply with the command from the master controller can be detected by comparing the pressurized state of the output command line of the master controller and the current flowing through the drive motor.
The problem here is when the electric valve control device outputs an output when the electric car is stopped, and this means that current flows to the drive motor when there is no power running or brake command from the main controller. This can be resolved by detecting this and opening the high-speed circuit breaker. This detector and the mechanism that opens the high-speed breaker operate in a separate system from the device that controls the electric valve. This ensures that the control device with the electric valve is mechanically opened in the event of an abnormality in the control of the electric valve, so the electric car will not run abnormally. [Example] An example of the present invention will be described below with reference to FIG. Electric power is supplied to the vehicle by the current collector 1, and the high-speed breaker,
Control system with electric valve via 2! ! ! At step 3, control power is supplied to the drive motor 4 in accordance with the commands from the master controller 6, and the electric vehicle runs and stops. The high-speed breaker 2 opens only when an overcurrent failure occurs in the control device 3 or the drive motor 4. ft When the air wheel is coasting or stopped, it remains closed, the output of the electric valve control section 9 of the electric valve control device 3 is made zero, and as a result, control is performed by the control device 813 to cut off the power to the drive motor 4. When the electric vehicle coasts or stops, the power running command 7 of the main control lI6 is zero, or the brake command 8 is zero, and when there is no power running command or brake command, the output of the electric valve control unit 9 becomes zero. However, if a failure occurs in which the electric valve control unit 9 outputs the output of the electric valve control device 3 without these commands, a stopped electric vehicle may suddenly , there is a danger that it will start running. For this reason,
Compare the output of the device 5 that detects the absence of a command from the master controller 6 and the fact that current is flowing through the drive motor 4, and if the current is flowing through the drive motor 4 when there is no command from the master controller 6, then A logic element 10 is provided to open the high speed circuit breaker. This logical element can be of any type, whether it is a hardware structure or a software structure. To show an example of the logic element 10, when there is a power running command 7 or a brake command 8, the AND element 11 does not output, so the transistor 12 becomes non-conductive, the control relay 13 is not excited, and the high-speed breaker control coil 14 is turned off. It is energized and high-speed breaker 2 is closed. On the other hand, when current flows to the drive motor when there is no power running or brake command, the AND element 11 outputs and the high speed breaker 2 opens. According to the present invention, even if the electric valve control unit 9 breaks down, power will not be supplied to the drive motor when there is no power running command 7 or brake command 8 from the main controller 6, and a safe electric vehicle can be achieved. Provides controllable effects. [Effects of the Invention] According to the present invention, by simply adding the function of detecting a mismatch between the command of the main controller and the input of the drive motor and opening the high-speed breaker, it is possible to solve the problem that was previously connected in series with the high-speed breaker. Since it also functions as a current breaker that opens the circuit when coasting or stopped, as a result, the current breaker can be omitted.
It has the effect of reducing the weight and cost of electrical products.

[Brief Description of the Drawings] Figure 1 shows an electric circuit block diagram of an embodiment of the present invention.

Claims (1)

[Scope of Claims] 1. A current collector that obtains power to drive an electric car from an overhead contact line, a control device with an electric valve that supplies controlled power to a drive motor according to commands from a main controller in a driver's cab, and An electrical system consisting of a high-speed shield disconnector installed between an electric device and the electric valve control device, the electric valve control device keeping the shield disconnector closed when the electric vehicle is stopped or coasting. In an electric vehicle control device that closes an electric valve of the device and cuts off power to the drive motor, power is supplied to the drive motor even though there is no power running or brake command from the master controller. What is claimed is: 1. An electric vehicle control device comprising: a detection device; the detection device opens the shingle breaker.