Filter for electric vehicle converting equipment

A technology for transforming equipment and electric vehicles, applied in electrical components, impedance networks, multi-terminal pair networks, etc., can solve problems such as affecting the stability of the post-stage system, changing the system transfer function, and damping and oscillating at the output end, which is beneficial to the development and Application, EMI suppression, stable performance effect

Inactive Publication Date: 2016-03-16
ZIBO POWERLINK ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Usually, a simple LC low-pass filter can satisfy the low-frequency filtering effect, but because it is an undamped or under-damped system, when it is used as the input filter of the system, it is easy to cause system instability. When it is used as the output filter of the system, it is easy to cause damping oscillation at the output end, and sometimes it will cause ...

Method used

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  • Filter for electric vehicle converting equipment
  • Filter for electric vehicle converting equipment
  • Filter for electric vehicle converting equipment

Examples

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Embodiment Construction

[0029] Figure 1~3 It is the best embodiment of the present invention, below in conjunction with attached Figure 1-12 The present invention will be further described.

[0030] Such as figure 1 As shown, a filter for electric vehicle conversion equipment includes capacitors C1-C2, resistor R1 and inductor L1. After the positive pole of the input terminal is connected in series with the inductor L1, one end of the capacitor C1 and the positive pole of the output terminal are connected in parallel at the same time. The other end of the inductor C1 is connected in parallel with the resistor R1 and one end of the capacitor C2. The resistor R1 is connected in parallel with the capacitor C1, and the capacitor C2 is connected in parallel with the resistor R1 to pass the high-frequency signal and reduce the energy loss of the damping resistor.

[0031] The principle of optimal damping design of the filter is that the output impedance of the filter reaches a peak value at the resona...

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PUM

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Abstract

The invention provides a filter for electric vehicle converting equipment, and belongs to the technical field of electric vehicles. The filter is characterized in that the filter comprises a damping filtering unit connected between an input terminal and an output terminal and a resistance-capacitance filtering unit connected between the damping filtering unit and a grounding terminal and used for enabling high-frequency signals to pass. The filter for the electric vehicle converting equipment comprises the damping filtering unit and the resistance-capacitance filtering unit connected between the damping filtering unit and the grounding terminal and used for enabling the high-frequency signals to pass, and the structure is simple; the resistance-capacitance filtering unit is provided so that high-frequency signals can be passed, and the energy loss of a damping resistor is reduced; and the filter for the electric vehicle converting equipment is advantaged by stable performance during practical usage via the simulation of a Bode diagram and a Nyquist diagram and with the combination of stability criterion.

Description

technical field [0001] The utility model relates to a filter for electric vehicle conversion equipment, which belongs to the technical field of electric vehicles. Background technique [0002] Input filter and output filter are important components in switching power supply. At the input end of the switching power supply, the EMI filter can not only suppress the switching peak current from flowing into the power supply, but also prevent the high-frequency interference on the power line from being transmitted to the post-stage converter. Moreover, the input filter of the switching power supply is conducive to improving the electromagnetic compatibility within the system and between systems. The interaction between the input filter and the post-stage converter has certain influence on the system stability. And the output filter can ensure the stable operation of the load and provide a smooth output voltage waveform. [0003] In the prior art, EMI filters are divided accordi...

Claims

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Application Information

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IPC IPC(8): H03H7/01
Inventor 高小群吕宏
Owner ZIBO POWERLINK ELECTRONICS TECH
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