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A dual three-phase motor four-leg inverter and its control method

A three-phase motor and control method technology, applied in motor generator control, AC motor control, multiple motor speed/torque control, etc., can solve problems such as complex control methods, and achieve clear physical concepts and rapid torque response. , the effect of simple structure

Active Publication Date: 2020-09-22
WEIHAI CREDITFAN VENTILATOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This structure can reduce two power switches and effectively reduce the hardware cost, but the control method of the system is more complicated

Method used

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  • A dual three-phase motor four-leg inverter and its control method
  • A dual three-phase motor four-leg inverter and its control method
  • A dual three-phase motor four-leg inverter and its control method

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Embodiment Construction

[0037] The present invention is described in further detail below in conjunction with accompanying drawing:

[0038] like figure 1 , figure 2 As shown, a dual-three-phase motor four-leg inverter includes a controller, a three-phase motor M1, a three-phase motor M2, and four inverter bridge arms connected in parallel to the same DC power supply, three of which are inverter Each bridge arm of the inverter includes two power switch tubes in series, and the other bridge arm of the inverter includes three power switch tubes in series, wherein the first winding of the three-phase motor M1 and the first winding of the three-phase motor M2 are respectively Connected to the midpoint of the two inverter bridge arms composed of two series-connected power switch tubes, the second winding of the three-phase motor M1 and the second winding of the three-phase motor M2 are commonly connected to the other by two At the midpoint of the bridge arm composed of three series-connected power swit...

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Abstract

The invention discloses a dual-three-phase motor four-bridge arm inverter and a control method thereof. The method comprises the following steps: the actual speeds of two three-phase motors are acquired, and the actual speeds and the given speeds of the two motors are sent to a speed adjustment module to obtain the speed errors of the two motors; the speed errors of the two three-phase motors aresent to a PI controller to obtain the given currents of the two three-phase motors; the obtained given currents are sent to a reference current generator to obtain the reference currents of the two three-phase motors; the reference currents and the actual currents are sent to a current adjustment module to obtain the current errors; the current error in the phase winding connected with each independent bridge arm is sent to a hysteresis controller; and the signal generated by the hysteresis controller passes through a PWM generation unit, and the two three-phase motors are controlled by the PWM generation unit. The dual-three-phase motor four-bridge arm inverter and the control method thereof are applicable to a variety of different types of three-phase AC motors, have the advantages of simple algorithm, fast response and high precision, are simple to implement, and have a wide range of application.

Description

technical field [0001] The invention relates to the technical field of motor control, in particular to a dual-three-phase motor four-arm inverter and a control method thereof. Background technique [0002] In recent years, with the higher demands of social life and industrial production, dual-motor control systems are widely used in papermaking, transportation, electric vehicles, washing machines, air conditioners and other home appliances. The multi-phase motor drive system has the characteristics of low voltage, high power output, high power density, small torque fluctuation, suitable for fault-tolerant operation, etc., and has received extensive attention. The dual-motor system can eliminate the transmission gap and share the load by controlling the output torque of the two motors. In a dual-motor drive system, the need to control both motors at the same time presents a higher level of complexity for developers not only to deal with, but also to ensure safe operation und...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P5/74H02P27/06H02P6/04H02P8/40
CPCH02P5/74H02P6/04H02P8/40H02P27/06
Inventor 林海陈金平周熙炜司利云龚贤武巩建英陈俊硕李耀华
Owner WEIHAI CREDITFAN VENTILATOR
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