High efficiency and wide-range speed control method for stator permanent magnet type memory motor

A technology of memorizing motors and control methods, which is applied in the field of electric transmission, can solve the problems of efficiency optimization and wide speed regulation closed-loop control methods that have not been reported in research reports, and achieve the effects of reducing the difference in actual loss, improving accuracy, and avoiding large calculation errors

Active Publication Date: 2017-05-31
SOUTHEAST UNIV
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Problems solved by technology

However, the current research on this type of motor is mainly focused on the new topology and new principles, and there are no research reports on the efficiency optimization and wide speed regulation closed-loop control methods.

Method used

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  • High efficiency and wide-range speed control method for stator permanent magnet type memory motor
  • High efficiency and wide-range speed control method for stator permanent magnet type memory motor
  • High efficiency and wide-range speed control method for stator permanent magnet type memory motor

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Embodiment Construction

[0033] The present invention will be further explained below in conjunction with the accompanying drawings.

[0034] Such as figure 1 As shown, a stator permanent magnet memory motor drive and online magnetic modulation coordinated control method, the method specifically includes the following steps:

[0035] 1) Use the position sensor to collect the position signal of the motor, and send it to the controller for signal processing to obtain the actual speed ω of the motor e and the rotor position angle θ, then the actual speed of the motor ω e and a given speed After the comparison, the speed deviation signal is obtained, and the signal obtained by the speed regulator is used as the torque given signal.

[0036] 2) Collect the phase current i of the main circuit of the motor a and i b and magnetic modulation pulse i f , where the phase current is transformed by Clark and Park to obtain the direct axis current i in the two-phase rotating coordinate system d and quadra...

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Abstract

The invention discloses a high efficiency and wide-range speed control method for a stator permanent magnet type memory motor. The method comprises the steps that the area where the motor rotating speed is located is judged through an area judging module, and different current distribution modes are adopted in different areas according to a division control strategy. In the low-speed area, a minimum value of which input power is in an AlNiCo permanent magnet flux linkage changing interval is looked up through a step-size adaptive search algorithm to achieve efficiency optimizing control of the motor, not only is the problem that a large error is generated when calculation is conducted by adopting a motor loss formula method avoided, but also inverter losses, stray losses and the like which are difficult to calculate through mathematical modeling are included in efficiency optimizing control, a difference from actual losses of a control system is decreased, and the efficiency optimizing control precision is improved. In the high-speed area, by means of the flux weakening method that a flux weakening flux linage needed in flux weakening control is obtained through a voltage difference method and a formula method, the stator permanent magnet type memory motor can achieve the high stability margin and dynamic property in a wide speed range.

Description

technical field [0001] The invention belongs to the technical field of electric transmission, and relates to a high-efficiency and wide-speed control method of a stator permanent magnet memory motor with strong robustness. Background technique [0002] In the magnetization process of the stator permanent magnet memory motor, the flux pulse action time is short, and the flux loss generated in the flux winding is negligible. Similar to the ordinary permanent magnet synchronous motor, the loss mainly includes the stator copper loss. , stator iron loss and stray loss and other parts. In order to improve the operating efficiency of the stator permanent magnet memory motor, it is necessary to study a reasonable control strategy to reduce the system loss. However, the current research on this type of motor is mainly focused on the new topology and new principles, and there are no research reports on the efficiency optimization and wide speed regulation closed-loop control methods....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/00H02P25/02
CPCH02P21/00H02P25/02
Inventor 林明耀杨公德李念谭广颖张贝贝刘凯付兴贺
Owner SOUTHEAST UNIV
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