Asynchronous motor parameter on-line identification system and method
A technology for asynchronous motors and identification systems, applied to control systems, control generators, vector control systems, etc., can solve problems such as online parameter identification of frequency converters
Active Publication Date: 2017-11-28
XI AN JIAOTONG UNIV
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[0005] The technical problem to be solved by the present invention is to provide an asynchronous motor parameter online identification syste
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[0083] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:
[0084] When the asynchronous motor is running in a steady state, the voltage acquisition unit collects the input phase voltage of the motor and converts it into +5~-5V voltage acceptable to the A / D sampling unit through the voltage Hall sensor; the current acquisition unit collects the input line voltage of the motor The current is collected and converted into +5~-5V voltage acceptable to the A / D sampling unit through the Hall current sensor; the speed acquisition unit converts the steady-state asynchronous motor mechanical speed into a digital signal through the encoder, and sends it directly to the micro The controller; the timing unit sends a request command to the A / D sampling unit and the data storage unit at regular intervals; the A / D sampling unit outputs the voltage acquisition unit and the current acquisition unit after receiving the req...
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The present invention provides an asynchronous motor parameter on-line identification system and method. The system includes a voltage acquisition unit, a current acquisition unit, a rotation speed acquisition unit, a timing unit, an A/D sampling unit, a data storage unit and a parameter calculation unit; the voltage acquisition unit acquires the phase voltage of a motor and converts the phase voltage into voltage of +5 to -5V; the current acquisition unit acquires the line current of the motor and convert the line current into voltage of +5 to -5V; the rotation speed acquisition unit converts the mechanical rotating speed of the motor into digital signals through an encoder; the timer unit sends a request to the A/D sampling unit and the data storage unit every fixed time; after receiving the request signals of the timer, the A/D sampling unit converts inputted analog signals into digital signals; after receiving commands sent by the timer unit, the data storage unit reads and stores the digital signals outputted by the A/D sampling unit and the rotation speed sampling unit; and the parameter calculation unit calculates completes the online identification of asynchronous motor parameters by using the data in the data storage unit.
Description
Technical field: [0001] The invention relates to the technical field of motor control, in particular to an asynchronous motor parameter online identification system and method. Background technique: [0002] Since the concept of vector control was proposed, the identification of asynchronous motor parameters has been a hot spot of concern. With the continuous improvement of the manufacturing technology and performance of the microcontroller, the motor control performance has a wider room for improvement. The performance of the current vector control strategy or direct torque control strategy for driving asynchronous motors directly depends on the accuracy of the motor parameters. [0003] At present, the commonly used parameter identification algorithms for asynchronous motors are mostly parameter estimations of the motor in a static state or offline state. However, the actual motor parameters, especially the motor self-inductance and rotor resistance, will be affected by t...
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Login to View More IPC IPC(8): H02P21/14
CPCH02P21/14
Inventor 沈传文张鹏杨文张立宇
Owner XI AN JIAOTONG UNIV