A driving topology for eliminating pwm frequency noise of dual three-phase motors

A dual-three-phase, topology technology, applied in motor control, output power conversion devices, electrical components, etc., can solve the problems of LC filter weight and cost increase, motor control system order increase, increase line impedance, etc. Achieve high application value and economic value, eliminate audible noise, and eliminate electromagnetic vibration

Active Publication Date: 2020-05-15
HARBIN INST OF TECH
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  • Abstract
  • Description
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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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  • A driving topology for eliminating pwm frequency noise of dual three-phase motors
  • A driving topology for eliminating pwm frequency noise of dual three-phase motors
  • A driving topology for eliminating pwm frequency noise of dual three-phase motors

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[0026] 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.

[0027] like figure 1 As shown, the traditional dual three-phase motor circuit topology includes two identical voltage source inverters VSI1 and VSI2 and a dual three-phase motor M, the circuit topology of VSI1 and VSI2 is as follows image 3 shown. The voltage source inverter VSI1 and the voltage source inverter VSI2 are connected in parallel on the same bus DC_link; the output terminals A1, B1 and C1 of the voltage source inverter VSI1 are respectively connected to the input terminals x1, y1 and z1 of the dual three-phase motor M connected; the outpu...

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Abstract

The invention discloses a driving topology capable of eliminating PWM frequency noise of a dual-three-phase motor. The driving topology comprises two same voltage source inverters VSI1 and VSI2, a dual-three-phase motor M and three same coupling inductors La, Lb, and Lc. By virtue of the coupled inductors, PWM frequency harmonic waves in the output phase voltage of a three-phase motor driver or athree-phase power inverter can be eliminated. By virtue of the novel topology provided by the invention, the advantage of high dynamic response of the conventional circuit topology is maintained, andPWM frequency voltage and current resonant waves also can be lowered effectively, thereby eliminating electromagnetic vibration of motor PWM frequency and highly reducing the size of an output filterof the power inverter; and therefore, the driving topology 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 driving topology for eliminating PWM frequency noise, which is used for a three-phase motor driver or a three-phase power inverter. Background technique [0002] Traditional motor drivers or power inverters generally use the SVPWM strategy to modulate the bus voltage to obtain a 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, using the SVPWM strategy will cause the motor to gene...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/12H02P29/50
CPCH02M1/126H02P29/50
Inventor 黄盈亮徐永向张文韬邹继斌邹继明
Owner HARBIN INST OF TECH
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