Active bleeder circuit of motor controller for electric car and control method thereof

A technology of motor controller and bleeder circuit, applied in the direction of AC motor control, control system, electrical components, etc., can solve problems such as the large space occupied by the active bleeder circuit, the inability of the circuit to monitor its own state, and the inconvenient maintenance of the motor controller. , to achieve the effect of simple structure, small footprint and low cost

Active Publication Date: 2012-10-10
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the more advanced energy discharge circuits adopt active discharge, but the discharge circuit is complex and the cost is high; the circuit itself cannot monitor its own state, and once the system fails or the discharge circuit device is damaged, it cannot realize self-dia

Method used

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  • Active bleeder circuit of motor controller for electric car and control method thereof

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Embodiment 1

[0022] The active discharge circuit of the electric vehicle motor controller in this embodiment includes a motor controller U1, a supporting capacitor C1 of the motor controller, and a bus voltage connected in parallel to both ends of the supporting capacitor C1 for detecting the bus voltage of the motor controller U1 power supply. The detection circuit U3, the motor controller U1 is connected to the bus voltage detection circuit U3, the negative end of the support capacitor C1 is grounded; the support capacitor C1 is connected in parallel with a series circuit formed by connecting the first resistor R1 and the second resistor R2 in series; the first resistor The junction of R1 and the second resistor R2 is connected to the control terminal (base) of the discharge switch Q1 made of triode; the positive terminal of the support capacitor C1 is connected to the current input terminal (collector) of the discharge switch Q1 through the discharge resistor RX ), and the current output...

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Abstract

The invention provides an active bleeder circuit of a motor controller for an electric car and a control method thereof. The active bleeder circuit has the advantages of high reliability, safe and high space utilization rate and the active bleeder circuit is convenient for maintenance. The active bleeder circuit comprises a motor controller and a support capacitor of the motor controller, wherein a negative terminal of the support capacitor is in a ground connection. The capacitor is in parallel connection with a series circuit formed by series connection of a first resistor and a second resistor, wherein the contact point of the first resistor and the second resistor is connected with a control terminal of a bleeder switch. A positive terminal of the support capacitor is connected with a current input terminal of the bleeder switch by a bleeder resistor, wherein a current output terminal of the bleeder switch is connected with a negative terminal of the support capacitor. The motor controller possesses a first signal output pin, wherein the first signal output pin is connected with a control terminal of a control switch by a first isolation drive circuit, and an output signal output terminal of the control switch is connected with the control terminal of the bleeder switch.

Description

technical field [0001] The invention belongs to the technical field of electric vehicle motor drive, and in particular relates to an active discharge circuit of a motor controller for an electric vehicle and a control method thereof. Background technique [0002] With the global oil resources becoming increasingly tense and environmental pollution becoming more and more serious, various energy-saving and environmentally friendly new energy vehicles are emerging, especially electric vehicles and hybrid vehicles are attracting more and more people's attention and ignorance, which is mainly due to the Breakthroughs in new energy, new materials, high-performance microprocessor technology, and large-capacity power battery technology have given people a new understanding of electric vehicles / hybrid vehicles. At the same time, the acceptance of electric vehicles has been greatly improved. People Already willing to buy electric vehicles as a means of transportation. [0003] In an ...

Claims

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Application Information

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IPC IPC(8): H02P25/16
Inventor 杭孟荀林伟义吴瑞邵平魏昌田袁文爽凌欢
Owner CHERY AUTOMOBILE CO LTD
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