Circuit topology for eliminating pwm noise of dual three-phase motor driven by h-bridge

A dual-phase, circuit technology, applied in AC motor control, motor vibration suppression control, electrical components, etc., can solve the problems of increased weight and cost of LC filters, increased order of motor control systems, and increased line impedance, etc. Achieve high application value and economic value, eliminate audible noise, and eliminate electromagnetic vibration

Active Publication Date: 2021-10-26
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this way, the weight and cost of the LC filter are greatly increased
[0005] (2) The introduction of the LC filter also increases the order of the motor control system, degrades the control characteristics of the motor current, and reduces the dynamic performance of the system
[0006] (3) The inductance and capacitance of the LC filter itself will increase the impedance of the line, which will increase the loss of the system

Method used

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  • Circuit topology for eliminating pwm noise of dual three-phase motor driven by h-bridge
  • Circuit topology for eliminating pwm noise of dual three-phase motor driven by h-bridge
  • Circuit topology for eliminating pwm noise of dual three-phase motor driven by h-bridge

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Embodiment Construction

[0034] The technical solutions of the present invention will be further described below with reference to the accompanying drawings, but it should be covered by modifying or equivalent replacement of the technical solution of the present invention without departing from the spirit and scope of the present invention, without departing from the spirit and scope of the present invention. In the scope of protection.

[0035] like figure 1 As shown, the traditional H-bridge-driven double-phase motor circuit topology contains six identical voltage source inverters vsi1, vsi2, vsi3, vsi4, vsi5 and vsi6 and a two-phase motor M, VSI's circuit topology image 3 Indicated. Six voltage source inverters VSI1, VSI2, VSI3, VSI4, VSI5, and VSI6 are connected in parallel on the same bus DC_LINK; the output terminals A1, B1, and the two-three-phase motor M of the voltage source inverter VSI1 X1, Y1 Connected; the output terminals A2, B2, and the two-three phase motor M of the voltage source inverter...

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Abstract

The invention discloses a circuit topology for eliminating the PWM noise of a dual three-phase motor driven by an H bridge. The circuit topology includes six identical voltage source inverters VSI1, VSI2, VSI3, VSI4, VSI5 and VSI6, Phase motor M and three identical coupled inductors La, Lb, Lc. The invention utilizes coupling inductance to eliminate PWM harmonics in output phase voltages of dual-three-phase motor drivers or power inverters. The new topology provided by the invention not only maintains the advantages of fast dynamic response of the traditional circuit topology, but also can effectively reduce the voltage and current harmonics of the PWM frequency, eliminate the electromagnetic vibration of the PWM frequency of the motor, and greatly reduce the output of the power inverter The volume of the filter has extremely high application value and economic value.

Description

Technical field [0001] The present invention relates to a double three phase motor drive topology, and more particularly to a circuit topology that eliminates the H-bridge-driven double-phase motor PWM noise, a two-phase motor or power inverter for H-bridge driven. Background technique [0002] Traditional H-bridge-driven motor drivers or power inverters typically modulate the bus voltage using the SPWM policy to obtain three-phase AC voltage. It produces a large number of harmonics in the phase voltage in which harmonics are mainly concentrated in the PWM frequency and their integer frequency. For example, when the PWM frequency is 10.0 kHz, its phase voltage harmonic is mainly concentrated in 10.0 kHz, 20.0 kHz, 30.0 kHz, 40.0 kHz. The phase voltage input electrical machine generates the corresponding current, and the current will act on the vibration and noise of the corresponding frequency on the motor. When the PWM frequency is near 10.0 kHz, the SPWM policy will cause the m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P27/08H02P23/04
CPCH02P23/04H02P27/08
Inventor 徐永向黄盈亮张文韬邹继斌邹继明
Owner HARBIN INST OF TECH
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