Five-phase inverter with dual three-phase motors and control method of five-phase inverter

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: 2018-06-15
CHANGAN UNIV
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  • Abstract
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  • Claims
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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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  • Five-phase inverter with dual three-phase motors and control method of five-phase inverter
  • Five-phase inverter with dual three-phase motors and control method of five-phase inverter
  • Five-phase inverter with dual three-phase motors and control method of five-phase inverter

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Embodiment Construction

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

[0041] Such as 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...

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Abstract

The invention discloses a five-phase inverter with dual three-phase motors and a control method of the five-phase inverter. The control method comprises the steps of performing speed adjustment on actual rotational speeds of the two motors and a given rotational speed to obtain a rotational speed error; and enabling the rotational speed error of the two three-phase motors to pass through a PI controller to obtain a given current of the two three-phase motors, enabling the obtained given current to pass through a reference current generator to obtain a reference current of the two three-phase motors, enabling the reference current and the actual current to pass through a current adjustment module to obtain a current error, sending the current error in a phase winding connected with each independent bridge arm to a hysteresis controller, allowing a signal generated by the hysteresis controller to pass through a PWM generation unit so that control of the two three-phase motors by the PWMgeneration unit is achieved, synchronous driving of the two motors at the same rotational speed is achieved, and synchronous driving of the two motors at different rotational speed also can be achieved. The control method is suitable for various different types of three-phase AC motors, has the advantages of simple algorithm, rapid response and high accuracy, is simple to implement and is wide inapplication range.

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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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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