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

A dual-three-phase, topological technology, applied in the direction of AC motor control, electrical components, control systems, etc., can solve the problems of increasing the weight and cost of LC filters, increasing the order of motor control systems, and increasing line impedance, etc., to achieve high Application value and economic value, the effect of eliminating audible noise and eliminating electromagnetic vibration

Active Publication Date: 2021-07-16
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 solution of the present invention will be further described below in conjunction with the accompanying drawings, but it is not limited thereto. Any modification or equivalent replacement of the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention should be covered by the present invention. within the scope of protection.

[0035] Such as figure 1 As shown, the circuit topology of a traditional H-bridge-driven dual three-phase motor includes six identical voltage source inverters VSI1, VSI2, VSI3, VSI4, VSI5, and VSI6 and a dual three-phase motor M. The circuit topology of VSI is as follows: image 3 shown. 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 and B1 of the voltage source inverter VSI1 and the input terminals x1 and y1 of the dual three-phase motor M The output termin...

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Abstract

The invention discloses a dual three-phase motor circuit topology for eliminating PWM noise of a dual three-phase motor driven by an H bridge. The dual three-phase motor circuit topology includes six identical voltage source inverters VSI1, VSI2, VSI3, and VSI4 , VSI5 and VSI6, a double three-phase motor M and six identical coupled inductors La1, Lb1, Lc1, La2, Lb2, Lc2. 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 size of the filter has extremely high application value and economic value.

Description

technical field [0001] The invention relates to a dual-three-phase motor driving topology, in particular to a circuit topology for eliminating PWM noise of an H-bridge-driven dual-three-phase motor, which is used for a dual-three-phase motor or a power inverter driven by an H-bridge. Background technique [0002] Traditional H-bridge-driven motor drivers or power inverters generally use SPWM strategy to modulate the bus voltage to obtain three-phase AC voltage. The generated phase voltage contains a large number of harmonics, and the harmonics are mainly concentrated around the PWM frequency and its integer multiple frequency. For example, when the PWM frequency is 10.0 kHz, its phase voltage harmonics are mainly concentrated around 10.0 kHz, 20.0 kHz, 30.0 kHz, and 40.0 kHz. The phase voltage input motor will generate corresponding current, and the current will excite vibration and noise of corresponding frequency on the motor. When the PWM frequency is around 10.0 kHz, u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P27/08H02P25/22
CPCH02P25/22H02P27/085
Inventor 徐永向黄盈亮张文韬邹继斌邹继明任芸陈强
Owner HARBIN INST OF TECH
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