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Method for inhibiting conducted emission of PWM power supply wire by adopting time sequence isolation

A technology of conducted emission and power line, applied in electrical components, output power conversion devices, etc., can solve the problems of excessive power line conducted emission, limited space installation location, increased cost, etc., to change the power-on sequence, eliminate The effect of conducted interference

Active Publication Date: 2016-06-08
JIANGXI HONGDU AVIATION IND GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Due to the high current operation of the PWM modulation module, the conduction emission of the power line is prone to exceed the standard. If the module is redesigned, the cost will increase and the space installation location will be limited. Moreover, the frequency band of the exceeding standard is wide, and adding a filter cannot completely eliminate the exceeding standard. frequency band

Method used

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  • Method for inhibiting conducted emission of PWM power supply wire by adopting time sequence isolation
  • Method for inhibiting conducted emission of PWM power supply wire by adopting time sequence isolation
  • Method for inhibiting conducted emission of PWM power supply wire by adopting time sequence isolation

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. The following examples are only used to illustrate the present invention, and are not intended to limit the protection scope of the present invention.

[0015] Such as image 3 As shown, a method of the present invention that uses timing isolation to suppress the conduction emission of the PWM power supply line cuts off the power supply of the carrier before the PWM modulation module is powered on, and adds a relay to the PWM modulation module to control the delayed power-on of the PWM modulation module. After the carrier cuts off the power supply, the PWM modulation module is powered by the internal power supply of the product.

[0016] Such as Figure 4 As shown, the PWM modulation module and the subsequent driven equipment are connected to the carrier power supply through the relay K1, and the internal power supply is connected to the PWM mo...

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Abstract

The invention discloses a method for inhibiting conducted emission of a PWM power supply wire by adopting time sequence isolation. The method comprises the following steps: disconnecting the power supply to a carrier before a PWM modulation module is electrified, adding a relay to the PWM modulation module, controlling the PWM modulation module to be postponed to be electrified, and after the carrier is powered off, powering the PWM modulation module by adopting a product internal power supply. According to the method for inhibiting the conducted emission of the PWM power supply wire by adopting the time sequence isolation, the electrification time sequence of the PWM modulation module is changed by virtue of simple and feasible time sequence isolation, so that the conducted interference on the carrier is eliminated.

Description

technical field [0001] The invention relates to a method for suppressing conductive emission of a PWM power supply line by adopting time sequence isolation. Background technique [0002] Due to the high current operation of the PWM modulation module, the conduction emission of the power line is prone to exceed the standard. If the module is redesigned, the cost will increase and the space installation location will be limited. Moreover, the frequency band of the exceeding standard is wide, and adding a filter cannot completely eliminate the exceeding standard. band. figure 1 It is a block diagram of the power supply sequence of the PWM modulation module adopted in the prior art. The sequence is: the carrier supplies power, the PWM modulation module is powered on, the internal power supply of the product works, and the carrier cuts off the power supply. The interference signal generated by the PWM modulation module will be transmitted to the carrier, and the PWM modulation m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/44
CPCH02M1/44
Inventor 张玮黄剑斌姚先秀聂志华黄鹤明袁飞马李科连马文超赵广超张玉新饶佳莉周玲雅
Owner JIANGXI HONGDU AVIATION IND GRP