CN203340026U

CN203340026U - Filter circuit used for electromagnetic interference on retarder controller

Info

Publication number: CN203340026U
Application number: CN201320361650XU
Authority: CN
Inventors: 杨帆; 马东闯
Original assignee: Shaanxi Fast Gear Co Ltd
Current assignee: Shaanxi Fast Gear Co Ltd
Priority date: 2013-06-21
Filing date: 2013-06-21
Publication date: 2013-12-11
Anticipated expiration: 2023-06-21

Abstract

The utility model discloses a filter circuit used for electromagnetic interference on a retarder controller. The filter circuit comprises first and a second power supply input ends, first and second power supply output ends, first and second X capacitors, a common mode inductor, and first and second Y capacitors, wherein the common mode inductor comprises a first coil and a second coil; the first power supply input end is connected with one end of the first X capacitor and one end of the first coil; the second power supply input end is connected with the other end of the first X capacitor and one end of the first coil; the other end of the first coil is connected with one end of the second X capacitor, one end of the first Y capacitor and the first power supply output end; the other end of the second coil is connected with the other end of the second X capacitor, one end of the Y capacitor and the second power supply output end; and the other end of the first Y capacitor and the other end of the second Y capacitor are grounded. The filter circuit is added into a power supply circuit of the retarder controller, and the interference signals can be effectively filtered, thus the malfunction due to electromagnetic radiation or inoperation due to function loss of the controller can be prevented.

Description

A kind of filter circuit for the buffer controller electromagnetic interference

[technical field]

The utility model relates to a kind of filter circuit, particularly a kind of filter circuit for the buffer controller electromagnetic interference.

[background technology]

Be accompanied by the development of Hyundai Motor, the kind of auto electronic equipments, quantity are also more and more, and this has just caused the situation of phase mutual interference between electronic equipment more and more serious, may cause electronic equipment, system cisco unity malfunction, produces serious consequence.Therefore, in order to reduce the harm of electromagnetic interference, just need to effectively prevent to circuit the optimal design of electromagnetic interference, improve the Electro Magnetic Compatibility of electronic equipment.

The power supply of buffer controller easily is subject to electromagnetic interference and causes signal skew or mistake, produces misoperation.While after interference signal is absorbed by wire harness, in the common mode mode, entering controller, can be converted into differential mode interference and enter inside, these interference signals can directly affect the processing of normal signal, then subsequent conditioning circuit are produced to larger interference.

[utility model content]

The purpose of this utility model is to provide a kind of filter circuit for the buffer controller electromagnetic interference, to solve the problems of the technologies described above.

To achieve these goals, the present invention adopts following technical scheme:

A kind of filter circuit for the buffer controller electromagnetic interference, comprise the first power input, second source input, the first power output end, second source output, an X capacitor C X1, the 2nd X capacitor C X2, common mode inductance L, a Y capacitor C Y1 and the 2nd Y capacitor C Y2; Common mode inductance L comprises the first coil and the second coil; The first power input connects the end of an X capacitor C X1 and an end of the first coil; The second source input connects the other end of an X capacitor C X1 and an end of the second coil; The other end of the first coil connects the 2nd X capacitor C X2 mono-end, Y capacitor C Y1 mono-end and first power output end; The other end of the second coil connects the 2nd X capacitor C X2 other end, the 2nd Y capacitor C Y2 mono-end and second source output; The one Y capacitor C Y1 other end and the 2nd Y capacitor C Y2 other end ground connection.

The utility model further improves and is: described the first power input is connected the power supply of automobile retarder controller with the second source input.

With respect to prior art, the utlity model has following advantage: the utility model increases the EMI filter circuit in the power circuit of buffer controller, effectively filter interference signal, prevent that controller is because being subject to the electromagnetic radiation misoperation or losing function stop work; This EMI filter circuit highly versatile, can strengthen the interference rejection ability of controller.

[accompanying drawing explanation]

Fig. 1 is the structural representation of the utility model filter circuit.

[embodiment]

Refer to shown in Fig. 1, a kind of filter circuit for the buffer controller electromagnetic interference of the utility model, comprise the first power input, second source input, the first power output end, second source output, an X capacitor C X1, the 2nd X capacitor C X2, common mode inductance L, a Y capacitor C Y1 and the 2nd Y capacitor C Y2.Common mode inductance L comprises the first coil and the second coil.

The first power input connects the end of an X capacitor C X1 and an end of the first coil; The second source input connects the other end of an X capacitor C X1 and an end of the second coil; The other end of the first coil connects the 2nd X capacitor C X2 mono-end, Y capacitor C Y1 mono-end and first power output end; The other end of the second coil connects the 2nd X capacitor C X2 other end, the 2nd Y capacitor C Y2 mono-end and second source output; The one Y capacitor C Y1 other end and the 2nd Y capacitor C Y2 other end ground connection.

The utility model increases the EMI filter circuit in the power circuit of buffer controller, effectively filters interference signal, prevents that controller is because being subject to the electromagnetic radiation misoperation or losing function stop work.This EMI filter circuit highly versatile, can strengthen the interference rejection ability of controller.

Claims

1. the filter circuit for the buffer controller electromagnetic interference, it is characterized in that, comprise the first power input, second source input, the first power output end, second source output, an X capacitor C X1, the 2nd X capacitor C X2, common mode inductance L, a Y capacitor C Y1 and the 2nd Y capacitor C Y2; Common mode inductance L comprises the first coil and the second coil; The first power input connects the end of an X capacitor C X1 and an end of the first coil; The second source input connects the other end of an X capacitor C X1 and an end of the second coil; The other end of the first coil connects the 2nd X capacitor C X2 mono-end, Y capacitor C Y1 mono-end and first power output end; The other end of the second coil connects the 2nd X capacitor C X2 other end, the 2nd Y capacitor C Y2 mono-end and second source output; The one Y capacitor C Y1 other end and the 2nd Y capacitor C Y2 other end ground connection.

2. a kind of filter circuit for the buffer controller electromagnetic interference according to claim 1, is characterized in that, described the first power input is connected the power supply of automobile retarder controller with the second source input.