Electromagnetic interference filtering circuit for charging control system of new energy electric automobile
An electromagnetic interference filtering, electric vehicle technology, applied in circuit devices, emergency protection circuit devices, electrical components, etc., can solve problems such as internal short circuit, transistor breakdown, junction temperature damage, etc., and achieve the effect of preventing electromagnetic interference.
Pending Publication Date: 2019-09-06
JIANGSU UNIV OF TECH
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- Claims
- Application Information
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Problems solved by technology
The spike voltage caused by electromagnetic interference can increase the concentration of impurities at a certain point in the emitter junction and collector junction, resulting in transistor breakdown or internal short circuit
Transistors operating under strong radio frequency electromagnetic fields will absorb enough energy to make the junction temperature exceed the allowable temperature rise and cause destruction
Method used
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[0013] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0014] An electromagnetic interference filter circuit for a new energy electric vehicle charging control system, comprising a ground terminal L, a fuse F1, a thermistor-RT1, a piezoresistor RV1, a capacitor CX1 and a fire terminal N, the ground terminal L and A fuse-F1, a thermistor-RT1 and a varistor-RV1 are sequentially connected in series between the live wire terminals N, and the varistor-RV1 is also connected in parallel with the capacitor-CX1, and also includes a rectifier bridge B, and the capacitor-CX1 It is connected in parallel with rectifier bridge B; it also includes inductance one L01, capacitor two CX2 and inductance two L02. B is connected in series w...
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The invention relates to a pre-stage electromagnetic interference filtering circuit of a switching power supply, in particular to an electromagnetic interference filtering circuit for a charging control system of a new energy electric automobile. The electromagnetic interference filtering circuit comprises a ground wire terminal L, a fuse I F1, a thermistor I RT1, a voltage dependent resistor I RV1, a capacitor I CX1 and a live wire terminal N; the fuse I F1, the thermistor I RT1 and the voltage dependent resistor I RV1 are sequentially connected between the ground wire terminal L and the livewire terminal N in series; the voltage dependent resistor I RV1 is also connected with the capacitor I CX1 in parallel; the circuit also comprises a rectifier bridge B; and the capacitor I CX1 and the rectifier bridge B are connected in parallel. The electromagnetic interference filtering circuit for the charging control system of the new energy electric automobile can prevent electromagnetic interference generated when the system works, so that the system works in a stable state.
Description
technical field [0001] The invention relates to an electromagnetic interference filter circuit at the front stage of a switching power supply, in particular to an electromagnetic interference filter circuit for a charging control system of a new energy electric vehicle. Background technique [0002] Electromagnetic interference EMI, there are two kinds of conducted interference and radiated interference. Conducted interference refers to the coupling (interference) of a signal on one electrical network to another electrical network through a conductive medium. Radiation interference refers to the interference source coupling (interference) its signal to another electrical network through space. In high-speed PCB and system design, high-frequency signal lines, integrated circuit pins, and various connectors may become radiation interference sources with antenna characteristics, which can emit electromagnetic waves and affect other systems or other subsystems in this system. ...
Claims
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IPC IPC(8): H02J3/01H02H7/26H02H5/04
CPCH02J3/01H02H7/262H02H7/263H02H5/042H02H5/041Y02E40/40
Inventor 刘晓杰张旻张婧婕刘超贾子彦晏友丹许娴薛波罗印升宋伟吴全玉王田虎崔渊
Owner JIANGSU UNIV OF TECH