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Self-powered active EMI filter

A self-sufficient power supply and filter technology, applied in the direction of converting irreversible DC power input to AC power output, electrical components, output power conversion devices, etc., to achieve the effect of saving energy and suppressing common mode noise current

Pending Publication Date: 2022-01-11
CHINA NORTH VEHICLE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The size of the traditional passive filter is positively correlated with the power, the greater the power, the larger the size, there are many limitations in the application scenario of the vehicle electric drive system

Method used

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  • Self-powered active EMI filter
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  • Self-powered active EMI filter

Examples

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Embodiment 1

[0100] In this example, according to figure 1 As shown, the functional block diagram of the self-supplied active EMI filter proposed by the present invention is shown, and the details are as follows:

[0101] like figure 1 As shown, the self-sufficient active EMI filter is connected to the DC power supply 1 and the inverter 2 respectively, and includes a detection circuit 10 , a noise processing circuit 20 , a self-sufficient power supply circuit 30 and a current injection circuit 40 .

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Abstract

The invention belongs to the technical field of power electronics, and particularly relates to a self-powered active EMI filter which is suitable for an electric driving system of an electric vehicle and comprises a detection circuit, a noise processing circuit, a self-powered circuit and a current injection circuit which are connected between a direct-current power source and an inverter. And the common-mode noise current in the direct-current bus can be effectively suppressed. Compared with a traditional active filter, the self-powered active EMI filter provided by the invention utilizes noise energy to supply power, so that energy is effectively saved.

Description

technical field [0001] The invention belongs to the technical field of power electronics, and in particular relates to an active EMI filter capable of self-sufficient power supply, which is suitable for an electric drive system of an electric vehicle. Background technique [0002] The electric drive system of an electric vehicle mainly includes a DC power supply, a motor controller (inverter) and a motor. The current motor controller widely adopts pulse width modulation (PWM), and the switching devices in it will be Form strong transient interference, dominated by common mode noise. [0003] The common-mode noise generated by the motor controller will be conducted along the DC bus to the DC power supply (usually a battery pack), causing damage to the power supply and affecting the normal operation of the battery management system (BMS). Electric vehicles integrate a large number of electrical equipment in a limited space, including sophisticated acquisition and control equi...

Claims

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Application Information

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IPC IPC(8): H02M1/44H02M1/00H02M7/42
CPCH02M1/44H02M1/00H02M7/42
Inventor 李小健熊瑛聂秀丽杜晓琳赵骥李燕焦美王天楠赵洋刘威张莹包新宇张世巍张毅杨光
Owner CHINA NORTH VEHICLE RES INST
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