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Control circuit of relay coil of electric vehicle

A technology of relay coils and electric vehicles, which is applied in the direction of relays, circuits, electrical components, etc., and can solve the problem of high requirements for relay operating parameters

Inactive Publication Date: 2011-08-24
SHANGHAI HUGONG AUTO ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide an electric vehicle relay coil control circuit to solve the problem of high requirements on the working parameters of the electric vehicle relay

Method used

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  • Control circuit of relay coil of electric vehicle
  • Control circuit of relay coil of electric vehicle
  • Control circuit of relay coil of electric vehicle

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Embodiment Construction

[0013] Such as image 3 As shown, the electric vehicle relay coil control circuit of the present invention includes a vehicle voltage detection circuit, a PWM pulse wave generation module, a drive circuit and a relay coil, the output of the vehicle voltage detection circuit is connected to the PWM pulse wave generation module, and the PWM pulse wave The output of the generation module pushes the relay coil through the drive circuit to control the opening and closing of the relay, wherein the PWM pulse wave generation module determines the relay coil current, impedance and withstand voltage according to the electromagnetic attraction on the side of the relay coil, according to the PI regulator and The anti-saturation regulator combines the vehicle voltage to obtain the PWM output frequency of the control side. Specifically, the average current power on the load is changed from 0-100% by changing the duty cycle of the output square wave, thereby changing the electromagnetic forc...

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Abstract

The invention discloses a control circuit of a relay coil of an electric vehicle, and the control circuit comprises a whole vehicle voltage detection circuit, a PWM (pulse width modulation) pulse wave generation module, a driving circuit and the relay coil, wherein the output of the whole vehicle voltage detection circuit is connected into the PWM pulse wave generation module, the output of the PWM pulse wave generation module pushes the relay coil to control the opening and the closing of a relay through the driving circuit, the PWM pulse wave generation module is used for determining current, impedance and voltage endurance of the relay coil according to electromagnetic attraction force on the relay coil side, and the PWM output frequency on the control side is obtained according to a PI (proportional-integral) regulator and an anti-saturation regulator with the combination of whole vehicle voltage. By adopting the control circuit, rapid suction of the controlled relay and minimum steady-state power consumption can be realized, therefore, the purposes of saving energy and improving the product reliability can be achieved.

Description

[0001] technical field [0002] The invention belongs to the technical field of electric vehicles, in particular to an electric vehicle relay coil control circuit. Background technique [0003] The research and development of electric vehicles has become an important direction for the development of new energy vehicle technology in the world, and the market potential of electric vehicle relay products matching it is emerging. However, since the operating voltage range of electric vehicle relays is 12V-900V, and the control current ranges from 10A to 500A, the working capacity of the contacts is evident. Compared with industrial DC contactors, the working environment and reliability requirements of electric vehicle relays are higher. For example, in vibration and shock experiments, the relay needs to withstand a duration of more than 10ms, and the peak value of the acceleration is 200m / s 2 test, while ensuring that the contacts cannot be disengaged. In order to enhance t...

Claims

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Application Information

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IPC IPC(8): H01H47/00
Inventor 施海星张磊陈峰金少华方政
Owner SHANGHAI HUGONG AUTO ELECTRIC
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