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Zero calculation method for permanent magnet synchronous motor rotating transformer

A permanent magnet synchronous motor and rotary transformer technology, applied in the direction of electronic commutator, etc., can solve the problems of high process requirements, poor versatility, increased hardware cost investment, etc., and achieve the effect of accurate calculation

Active Publication Date: 2015-05-27
CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can be seen from this that the implementation of the existing technology increases the hardware cost investment, has poor versatility, and has high requirements for the manufacturing process of the motor, and the calculated error of the zero position information of the resolver is large, and its accuracy cannot be guaranteed.

Method used

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  • Zero calculation method for permanent magnet synchronous motor rotating transformer
  • Zero calculation method for permanent magnet synchronous motor rotating transformer
  • Zero calculation method for permanent magnet synchronous motor rotating transformer

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Embodiment Construction

[0049] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0050] Before introducing the present invention, firstly, why it is necessary to calculate the zero position of the permanent magnet synchronous motor resolver is explained.

[0051] Such as figure 1 As shown in , it is a schematic diagram of rotor position detection. In the process of controlling the permanent magnet synchronous motor, the angle to be used is figure 1 Angle information θ between the A-axis winding of the middle stator and the D-axis of the r...

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Abstract

The invention discloses a zero calculation method for a permanent magnet synchronous motor rotating transformer. The method comprises the following steps: sampling feedback current and specified current of a permanent magnet synchronous motor, adding the difference of the feedback current and specified current into PI control to calculate the error voltage of the system, and obtaining the reference voltage amplitude needed by positioning of the rotating transformer with feed-forward voltage; meanwhile, calculating the included angle between the zero angle of the rotating transformer and a static coordinate axis A of the stator during setting of different phases by virtue of the different phase settings, and finally carrying out angular averaging to obtain the accurate zero information of the rotating transformer. According to the software programming angle, the investment of hardware cost does not need to be increased, and the zero information of the rotating transformer can be accurately calculated.

Description

technical field [0001] The invention relates to the technical field of permanent magnet synchronous motor control, in particular to a method for calculating the zero position of a rotary transformer of a permanent magnet synchronous motor. Background technique [0002] With the increasing requirements of the international community for low-carbon economy and energy conservation and emission reduction, permanent magnet synchronous motor drive It is used in many fields such as propulsion, wind power, aerospace and defense. [0003] The key factor that determines the control performance of the permanent magnet synchronous motor is the position and speed information of the rotor, because the rotor position information directly affects the angle distribution of the AC and direct axis currents, and further affects the power factor of the permanent magnet synchronous motor and the reactive power generation of the system. The loss and the demagnetization current of the permanent ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/16
CPCH02P6/16
Inventor 何亚屏许峻峰冯江华文宇良张朝阳肖磊刘雄石敏曾小凡
Owner CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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