Active discharge control circuit of motor controller of electric vehicle and controller

A motor controller and discharge control technology, which is applied in the direction of AC motor control, electric vehicles, battery circuit devices, etc., can solve problems such as increased controller burden, abnormal torque, and discharge failure, and achieve simple and convenient control, increased reliability, The effect of reducing the burden

Pending Publication Date: 2017-05-10
CHENGDU RAJA NEW ENERGY AUTOMOTIVE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides an active discharge control circuit and controller for an electric vehicle motor controller, aiming at solving the problem of using an inverter unit

Method used

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  • Active discharge control circuit of motor controller of electric vehicle and controller

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0021] Example one:

[0022] Refer to figure 1 , An electric vehicle motor controller active discharge control circuit, including a main discharge circuit and a discharge control circuit; the main discharge circuit includes a discharge resistor R1 and a thyristor VT1 connected in series; the discharge control circuit includes a discharge control module and ignition switch ON signal detection Branch; the output end of the ignition switch ON signal detection branch is connected to the discharge control module; the discharge control module is connected to the thyristor VT1 and controls the switch of the thyristor VT1. The discharge control module is a processor.

[0023] The following processors are discharge control modules, and the ON signal detection mechanism has the following two methods:

[0024] The first type: If isolation is required for detection, an isolation device such as an optocoupler must be used between the ON signal and the processor to send the signal to the process...

Example Embodiment

[0026] Embodiment two:

[0027] Refer to figure 1 , An electric vehicle motor controller, including a high-voltage battery, a low-voltage power supply circuit, an inverter circuit, a low-voltage battery, a DC capacitor Cdc, an ignition switch ON, a main discharge circuit and a low-voltage control unit.

[0028] The inverter circuit includes an inverter, a positive DC bus and a negative DC bus. The inverter is connected to the positive electrode of the high-voltage battery through the positive DC bus, and the inverter is connected to the negative electrode of the high-voltage battery through the negative DC bus. The DC capacitor Cdc is connected between the positive DC bus and the negative DC bus. The main discharge circuit includes a discharge resistor R1 and a thyristor VT1 connected in series. The discharge resistor R1 and the thyristor VT1 are connected between the positive DC bus and the negative DC bus.

[0029] The low-voltage battery supplies power to the low-voltage control...

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PUM

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Abstract

The invention provides an active discharge control circuit of a motor controller of an electric vehicle and the controller, and aims to solves the conditions that burden of the controller is increased and torque abnormity, rotary speed abnormity, discharge failure and other abnormity conditions are easily caused in a discharging mode by adopting an inversion unit in the prior art. The active discharge control circuit of the motor controller of the electric vehicle comprises a discharge main circuit and a discharge control circuit; the discharge main circuit comprises a discharge resistor R1 and a thyristor VT1 which are connected in series; and the motor controller of the electric vehicle comprises a high-voltage storage battery, an inversion circuit, a low-voltage power supply circuit, a low-voltage storage battery, a direct current capacitor Cdc, an ignition switch ON, a discharge main circuit and a low-voltage control unit. By adoption of the mode that the discharge resistor and the thyristor are connected in series, the burden of the inversion unit and the control program are relieved compared with the mode of discharging by adopting the inversion unit; and active discharge still can be ensured in failure of the inversion unit, so that reliability is improved.

Description

technical field [0001] The invention relates to the field of electric vehicle motor controller capacitor discharge, in particular to an electric vehicle motor controller active discharge control circuit and controller. Background technique [0002] The main realization of the motor controller is to convert the high-voltage direct current of the power battery on the electric vehicle into a three-phase alternating current through a three-phase inverter circuit to provide power for the motor, and then provide power for the operation of the car. The motor controller mainly includes a pre-charging circuit, a DC bus capacitor, an inverter circuit, a low-voltage control circuit, and a low-voltage power supply circuit. The pre-charging circuit is to pre-charge the DC bus capacitor connected in parallel to the DC bus when the power battery is connected to the DC bus, so as to avoid large surge current. The DC bus capacitor reduces the ripple voltage generated by the switching device...

Claims

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Application Information

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IPC IPC(8): H02J7/00H02J7/34H02P27/06
CPCH02J7/00H02J7/345H02P27/06
Inventor 徐浩贾雷王晓文钟伟
Owner CHENGDU RAJA NEW ENERGY AUTOMOTIVE TECH CO LTD
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