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Nine-switch inverter dual-motor drive system and control method thereof

A nine-switch inverter and dual-motor drive technology, which is applied in the field of permanent magnet synchronous motor system control, can solve the problems of inconvenient linkage control, high drive circuit energy, and large power loss.

Active Publication Date: 2020-07-28
TIANJIN SAIXIANG M&E ENG CO LTD
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  • Abstract
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Problems solved by technology

The traditional control method of dual permanent magnet synchronous motors is a parallel topology of two sets of three-phase six-switch inverters, which can realize the synchronous control of permanent magnet synchronous motors. However, two sets of three-phase six-switch inverters use a total of ten Two power switch tubes, the energy required for the drive circuit is large, and the power loss is large; and the two permanent magnet synchronous motors work independently, the control strategy is complex and cumbersome, and it is not convenient for linkage control

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  • Nine-switch inverter dual-motor drive system and control method thereof
  • Nine-switch inverter dual-motor drive system and control method thereof
  • Nine-switch inverter dual-motor drive system and control method thereof

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Embodiment Construction

[0056] In the description of the present invention, it should be understood that the terms "first" and "second" are used for description purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0057] In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the i...

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Abstract

The invention discloses a dual-motor driving system of a nine-switch inverter and a control method thereof. The system comprises two three-phase permanent magnet synchronous motors, a three-phase nine-switch inverter, a PI controller, a reference current generator, a hysteresis controller, a PWM pulse generating unit, a permanent magnet synchronous motor current detecting sensor, a Hall sensor anda direct current ( DC) power supply, wherein one end of the PI controller is connected with the DC power supply, and the other end is connected with the two three-phase permanent magnet synchronous motors through the reference current generator, the hysteresis controller, the PWM pulse generating unit and the three-phase nine-switch inverter in turn, and the permanent magnet synchronous motor current detecting sensor and the Hall sensor are respectively connected with a position and speed comparator and the reference current generator. The invention enables two permanent magnet synchronous motors to operate synchronously. According to the control topology structure and its control method, the power loss of the nine-switch inverter driven dual-permanent magnet synchronous motor is reducedby declining the number of the power switching tubes.

Description

technical field [0001] The invention belongs to the technical field of permanent magnet synchronous motor system control, and in particular relates to a nine-switch inverter dual-motor drive system topology and a control method thereof. Background technique [0002] With the continuous improvement of power electronics technology and the control theory of permanent magnet synchronous motors, the control method of permanent magnet synchronous motors driven by inverters has been widely used. In particular, the emergence of rare earth permanent magnet materials with high remanence density, high magnetic energy product and linear demagnetization curve and the development of corresponding technology not only reduce the production cost of permanent magnet synchronous motors, but also improve the permanent magnet synchronous motor. The performance of magnetic synchronous motors. The permanent magnet synchronous motor has the advantages of simple structure, high power density, light...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P6/04H02P21/22H02P27/08H02M7/5387H02P25/026
CPCH02M7/5387H02P6/04H02P21/0003H02P21/22H02P27/08H02P2006/045
Inventor 林海石伟李登峰李刚王飚梁华刚李晓辉李杰赵毅董媛张懿璞
Owner TIANJIN SAIXIANG M&E ENG CO LTD
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