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Method and device for detecting initial position angle of electro-excitation synchronous machine rotor

A technology of rotor initial position and synchronous motor, applied in motor generator control, control of electromechanical transmission, electronic commutation motor control, etc., can solve the problems of complex algorithm and low detection accuracy, and achieve strong anti-interference and detection accuracy. High, easy to achieve results

Inactive Publication Date: 2011-10-05
CHINA UNIV OF MINING & TECH +1
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method and device for detecting the initial position angle of the rotor of an electric excitation synchronous motor in view of the problems of low detection accuracy and complex algorithms existing in the existing electric excitation synchronous motor rotor initial position angle detection method

Method used

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  • Method and device for detecting initial position angle of electro-excitation synchronous machine rotor

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Embodiment 1

[0022] Embodiment 1: realize the step of the inventive method:

[0023] Step 1. The stator side is not energized, and the rotor excitation winding is powered by an H-bridge inverter, and the excitation method is sinusoidal AC excitation;

[0024] Step 2, the rotor winding generates alternating flux linkages to the stator winding through the air gap hinge, and the sinusoidal voltage induced by the stator winding is detected by the voltage sensor;

[0025] Step 3. The collected induced voltage is transformed into a voltage signal in the two-phase stationary coordinate system by 3s / 2s, and sent to the pure integral voltage model to obtain the stator flux linkage in the two-phase stationary coordinate system, that is, the rotor flux linkage;

[0026] Step 4, the rotor flux linkage under the two-phase stationary coordinate system is extracted by the sliding DFT algorithm to extract the fundamental wave flux linkage and its amplitude;

[0027] The sliding DFT table is expressed in ...

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Abstract

The invention provides a method and device for detecting an initial position angle of an electro-excitation synchronous machine rotor, belonging to a control method and device of a motor. A three-phase power supply in the device is connected with an electro-excitation synchronous machine by a three-phase voltage source inverter; a voltage transducer is connected with a power line between the three-phase voltage source inverter and the electro-excitation synchronous machine; the voltage transducer is connected with an input end of a DSP (digital signal processor) control system; an output end of the DSP control system is connected with a PC (personal computer); a DC (direct current) power supply is connected with a rotor exciting winding of the electro-excitation synchronous machine by an H-bridge inverter; a current transducer is connected with a power line between the H-bridge inverter and the rotor exciting winding of the electro-excitation synchronous machine; and IGBT (insulated gate bipolar translator) drive signals are connected with the H-bridge inverter. According to the invention, the structure is simple and reliable, the realization is easy, the anti-interference performance is strong, the detection accuracy is high, the additional hardware overhead is not required, and the detection result of the initial position angle of the rotor can be acquired.

Description

technical field [0001] The invention relates to a motor control method and device, in particular to a method and device for detecting the initial position angle of an electrically excited synchronous motor rotor. Background technique [0002] In the high-performance control system of electric excitation synchronous motor, whether the detection of rotor initial position angle is reliable or not directly affects the smooth start of the motor. In order to generate the correct voltage space vector at startup, the vector control system also needs to know the initial position angle of the rotor of the motor in order to ensure the smooth startup of the motor. Otherwise, the inaccurate observation of the stator flux linkage will reduce the system startup performance, and in severe cases, the system startup failure will result. [0003] Electric excitation synchronous motors are widely used in industrial production mechanical transmission, especially in high-power transmission, due t...

Claims

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Application Information

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IPC IPC(8): H02P21/14H02P27/06H02P21/18
Inventor 伍小杰戴鹏左东升符晓周二磊于月森袁庆庆宗伟林耿乙文吴迪胡永锋
Owner CHINA UNIV OF MINING & TECH
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