A five-phase inverter for a dual three-phase motor and its control method

A five-phase inverter and three-phase motor technology, which is applied in AC motor control, AC motor angular single-axis angular velocity control, control system, etc., can solve the problem of high hardware cost

Active Publication Date: 2021-04-06
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional dual-motor drive system mostly uses a twelve-switch six-arm inverter topology. Although the system with this structure has better control performance, the hardware cost of the system is relatively high.

Method used

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  • A five-phase inverter for a dual three-phase motor and its control method
  • A five-phase inverter for a dual three-phase motor and its control method
  • A five-phase inverter for a dual three-phase motor and its control method

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Embodiment Construction

[0040] The present invention is described in further detail below in conjunction with accompanying drawing:

[0041] like Figure 1 to Figure 3 As shown, a dual-three-phase motor five-phase inverter includes a controller, a three-phase motor M1, a three-phase motor M2, and five inverter bridge arms connected in parallel to a DC power supply; the five inverter bridge arms are all Including two series-connected power switch tubes, one winding of the three-phase motor M1 and three-phase motor M2 is commonly connected between the two power switch tubes of one of the inverter bridge arms, the other two windings of the three-phase motor M1 and the three-phase The other two windings of the motor M2 are separately connected between the two power switch tubes of the other four inverter bridge arms.

[0042] The five inverter bridge arms include inverter bridge arm Ba, inverter bridge arm Bb, inverter bridge arm Bc, inverter bridge arm Bd, and inverter bridge arm Be, and the winding C1...

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Abstract

The invention discloses a dual-three-phase motor five-phase inverter and a control method thereof. The speed error is obtained after adjusting the actual speed and the given speed of the two motors; and then the speed error of the two three-phase motors is passed through the The controller obtains the given current of the two three-phase motors, passes the obtained given current through the reference current generator to obtain the reference current of the two three-phase motors, passes the reference current and the actual current through the current regulation module to obtain the current error, and The current errors in the phase windings connected to each independent bridge arm are respectively sent to the hysteresis controller. The signal generated by the hysteresis controller passes through the PWM generation unit, and the PWM generation unit is used to realize the control of two three-phase motors. The synchronous drive of two motors at the same speed can also realize the synchronous drive of two motors at different speeds. The invention is applicable to many different types of three-phase AC motors. It has the advantages of simple algorithm, fast response and high precision, and is simple to implement. Wide range of applications.

Description

technical field [0001] The invention relates to the technical field of motor control, in particular to a five-phase inverter for a dual-three-phase motor and a control method. Background technique [0002] In recent years, with the higher demand of social life and industrial production, motor control systems are widely used in papermaking, transportation, electric vehicles, washing machines, air conditioners and other home appliances. Compared with the conventional single-motor drive system, the dual-motor system can eliminate the transmission gap and share the load by controlling the output torque of the two motors. Since the dual-motor drive system can share the load, the output power of the single-motor drive system can be effectively reduced. Therefore, 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 attentio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P23/18H02P23/14H02P27/08H02P5/74
CPCH02P5/74H02P23/14H02P27/08H02P23/18
Inventor 林海闫茂德龚贤武陈金平周熙炜司利云巩建英陈俊硕李耀华
Owner CHANGAN UNIV
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