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Double-permanent-magnet-synchronous-motor nine-switch inverter and control method thereof

A technology of permanent magnet synchronous motor and nine-switch inverter, which is applied in the direction of AC motor control, control system, and control of multiple AC motors, and can solve the problems of high cost, large power consumption, and many devices

Active Publication Date: 2018-07-06
CHANGAN UNIV
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Problems solved by technology

Traditionally, the double permanent magnet synchronous motor is controlled and driven by a twelve-switch inverter, which uses many devices, consumes a lot of power, and costs high

Method used

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  • Double-permanent-magnet-synchronous-motor nine-switch inverter and control method thereof

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Embodiment Construction

[0054] 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.

[0055] 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 can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the i...

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Abstract

The invention discloses a double-permanent-magnet-synchronous-motor nine-switch inverter and a control method thereof. The inverter comprises a first inverter bridge arm, a second inverter bridge armand a third inverter bridge arm. One end of the first inverter bridge arm, one end of the second inverter bridge arm and one end of the third inverter bridge arm are connected with a first three-phasepermanent magnet synchronous motor and a second three-phase permanent magnet synchronous motor, and the other end of the first inverter bridge arm, the other end of the second inverter bridge arm andthe other end of the third inverter bridge arm are connected in parallel and then connected with a common direct current power source. A selective switch is arranged on the front face of the double-permanent-magnet-synchronous-motor nine-switch inverter to control different PWM signals generated by two branches in the inverter at different times to be used for achieving time-sharing operation ofthe three-phase permanent magnet synchronous motors, and compared with the prior art, the number of switch gears is reduced, the power consumption is reduced, and the cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of motor system and control, and in particular relates to a nine-switch inverter for a double permanent magnet synchronous motor and a control method thereof. Background technique [0002] The permanent magnet synchronous motor (PMSM) is a synchronous motor that generates a synchronous rotating magnetic field by permanent magnet excitation. It has the characteristics of high power efficiency, high power factor, low heat generation, large allowable overload current, and high reliability. Compared with traditional Electrically excited synchronous motors and permanent magnet synchronous motors have the advantages of less loss, high efficiency, and obvious power-saving effects, making permanent magnet synchronous motors rapidly applied and developed in many fields. [0003] More and more domestic and foreign scholars have optimized the body design and control algorithm of permanent magnet synchronous motors. Tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P5/74H02P27/08
CPCH02P5/74H02P27/085
Inventor 林海夏登凯李登峰李刚王飚梁华刚李晓辉李杰赵毅董媛张懿璞
Owner CHANGAN UNIV
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