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Control method of five-phase inverter dual three-phase motor system

A technology of five-phase inverters and three-phase motors, which is applied in the direction of controlling multiple AC motors, can solve the problems that single-phase three-phase motor control methods cannot be directly used, and achieve the effect of simple structure and strong robustness

Active Publication Date: 2015-06-03
SOUTHEAST UNIV
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Problems solved by technology

[0003] Since a five-phase inverter is used to control two three-phase motors at the same time, various existing control methods suitable for single-three-phase inverters and single-three-phase motors cannot be directly used
However, there are no public reports on the use of current hysteresis control methods in dual three-phase motor systems with five-phase inverters

Method used

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  • Control method of five-phase inverter dual three-phase motor system
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  • Control method of five-phase inverter dual three-phase motor system

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Embodiment Construction

[0021] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in detail:

[0022] The idea of ​​the present invention is to improve the existing three-phase current hysteresis control method, so that it can be applied to a five-phase inverter dual-phase motor system, so as to have the inherent simple structure and strong robustness of the current hysteresis control method The advantages.

[0023] The control method for a five-phase inverter dual-phase motor system of the present invention, the five-phase inverter dual-phase motor system includes a five-phase inverter with first to fifth bridge arms, a first three-phase motor, The second three-phase motor; the first bridge arm, the second bridge arm, the fourth bridge arm, and the fifth bridge arm are independent bridge arms, and the midpoints of the bridge arms are respectively connected to the two-phase windings of the first three-phase motor, the second and third The two-phase...

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Abstract

The invention discloses a control method of a five-phase inverter dual three-phase motor system, and belongs to the technical field of motor control. The control method omprises the following steps: firstly, using a three-phase current hysteresis control method to get theoretical on-off states of three-phase windings of two two-phase motors; then, selecting the theoretical on / off state of a phase winding with greater absolute value of current deviation from two-phase windings connected with a public bridge arm as an actual on / off state of the public bridge arm, wherein the actual on-off state of an independent bridge arm is equivalent to the theoretical on / off state of the phase winding connected with the independent bridge arm; finally, controlling a five-phase inverter through the obtained actual on-off state. The invention further discloses a five-phase inverter dual three-phase motor system using the control method above. Compared with the prior art, the control method has the advantages of simple system structure, strong robustness and wider application scope.

Description

technical field [0001] The invention relates to the technical field of motor control, in particular to a control method of a five-phase inverter dual-phase motor system. Background technique [0002] Due to its wide application in textile, papermaking, steel rolling, and rail transit industries, multi-motor drive systems and their control methods have always been the research hotspots of scholars. In the multi-motor drive system usually studied, each three-phase motor is independently controlled by a three-phase inverter, which is also the most commonly used control structure in the multi-motor drive system. At the same time, with the development of multi-phase motors, multi-phase inverters have been widely used. Therefore, in order to reduce the number of switching devices used, researchers proposed a new multi-motor drive system control structure based on multi-phase inverters. For example, a five-phase inverter is used to control two three-phase motors at the same time, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P5/74
Inventor 王伟张景皓程明
Owner SOUTHEAST UNIV
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