Filter of impulse power output port of motor speed controller

A motor speed controller and pulse power technology, applied in the direction of electrical components, multi-terminal pair network, impedance network, etc., can solve the problems that the radiation interference of the servo system cannot be effectively suppressed, and the insulation damage of the motor winding can not be solved, so as to reduce the radiation interference , Conducted interference suppression, and the effect of improving the electromagnetic environment

Inactive Publication Date: 2013-03-20
XIAN KAIRONG ELECTRONICS TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the conduction interference suppression is not performed on the power output line, this method cannot solve the problem of insulation damage to the motor winding for the motor speed controller with a long power output line, let alone effectively suppress the interference of the servo system in the frequency band below 100MHz. radiation interference

Method used

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  • Filter of impulse power output port of motor speed controller
  • Filter of impulse power output port of motor speed controller

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Embodiment Construction

[0012] Such as figure 1 As shown, a filter for the pulse power output port of a motor governor includes a passive filter circuit and the overall shielding of the circuit. The passive filter circuit is an interference reflection circuit, and the interference reflection circuit is fixed in a shielding case. The interference reflection circuit It consists of two first common-mode inductors 1 and second common-mode inductors 2 with the same number of windings connected through series wires 3 . The series connection 3 of the first common mode inductor 1 and the second common mode inductor 2 realizes the equivalent common mode large inductance, reduces the inter-turn distributed capacitance of the winding, and realizes wide frequency band and high insertion loss of common mode interference on the power drive line At the same time, the choke effect of the leakage inductance of the first common mode inductor 1 and the second common mode inductor 2 reduces the time rate of change of th...

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Abstract

The invention relates to a filter of an impulse power output port of motor speed controllers. The filter comprises a passive filter circuit and whole shielding of the circuit, and the filter is characterized in that the passive filter circuit is an interference reflection circuit which is fixed in a shielding casing, and the interference reflection circuit is formed by a first common mode inductor and a second common mode inductor which are provided with same winding numbers and connected through a tandem connection line. The filter can be suitable to power output ends of the motor speed controllers in different types, protects winding insulation of a motor of servo systems in different types, simultaneously restrains conducted interference of a power output line of the motor speed controller, effectively reduces radiated interference of the servo system, and greatly improves an electromagnetic environment of site sensitive equipment.

Description

technical field [0001] The invention relates to a pulse interference filter, which belongs to the technical field of power electronics, in particular to a filter for a pulse power output port of a motor governor. Background technique [0002] Frequency converters and drives are increasingly used in industrial and military electronic systems, mainly for motor speed control and drive, and can be classified as motor speed controller series. The motor governor generally adopts a controllable PWM modulation method to output pulse power to drive the motor, so as to realize the precise control of the rotational position of the servo system. Because this driving mode has the characteristics of pulse interference, the conduction of the interference on the power output line will cause the servo system to have a large radiation interference in the frequency band below 100MHz, which seriously affects the normal operation of the field control system; at the same time, because the motor w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H7/09
Inventor 任琦
Owner XIAN KAIRONG ELECTRONICS TECH
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