Compensation method for high-speed position detection error in three-phase electric excitation doubly-salient motor

A double-salient motor and detection error technology, which is applied in the direction of motor generator control, electronic commutation motor control, control generator, etc., can solve problems such as commutation failure, improve detection accuracy, ensure accurate commutation and stability Easy to operate and implement

Inactive Publication Date: 2017-06-23
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

This patent application utilizes the characteristic that the zero-crossing position of the line flux linkage of the three-phase electric excitation doubly salient motor coincides with the commutation position, but the line flux linkage detected by this method also includes th

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  • Compensation method for high-speed position detection error in three-phase electric excitation doubly-salient motor
  • Compensation method for high-speed position detection error in three-phase electric excitation doubly-salient motor
  • Compensation method for high-speed position detection error in three-phase electric excitation doubly-salient motor

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Embodiment Construction

[0027] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0028] The three phases of the three-phase electrically excited doubly salient motor are A phase, B phase and C phase respectively. Below to figure 1 The three-phase electric excitation doubly salient pole motor with 12 / 8 pole structure is shown as an example for illustration, and the hardware structure of its control system is as follows: figure 2 As shown, it mainly includes: three-phase full-bridge inverter, terminal voltage sampling and conditioning circuit, phase current sampling and conditioning circuit, control circuit and three-phase electric excitation double salient pole motor, where U dc is the DC bus voltage, U n is the neutral point voltage of the three-phase winding of the motor, S 1 ~S 6 for the power MOSFET, D 1 ~D 6 is an antiparallel diode, R a , R b , R c Respectively, the three-phase winding resistance of the m...

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Abstract

The invention discloses a compensation method for high-speed position detection error in a three-phase electric excitation double salient pole motor, which detects the difference between the flux linkages of any two phases of the motor, and then subtracts the flux linkage component produced by the armature winding in the difference of these flux linkages , to eliminate the influence of the armature reaction on the zero-crossing position where the flux linkage difference changes from positive to negative. Compared with the prior art, the invention reduces the position observation error caused by the armature reaction, and realizes the accurate commutation and stable operation of the electric excitation double salient pole motor without a position sensor.

Description

technical field [0001] The invention belongs to the field of motor control, and relates to a position sensorless control method of an electrically excited double salient pole motor. Background technique [0002] Due to its simple structure, high reliability, and flexible air gap flux adjustment, electrically excited double salient motors have broad application prospects in aviation, new energy and other fields. Like the brushless DC motor, when the motor is used in the drive system, it needs to detect the rotor position to achieve accurate commutation. The additional sensor reduces the reliability of the system, increases the cost, and limits the application range of the motor. Therefore, the research on the electric excitation dual The position sensorless operation technology of salient pole motor is of great significance. [0003] At present, the position detection method based on flux linkage has been widely researched and applied in other motors, but little research has...

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Application Information

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IPC IPC(8): H02P21/18
Inventor 刘伟峰王慧贞张红岩姜浩宇陈强
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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