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A rotation blocking parameter recognition method and device for asynchronous motor

An asynchronous motor and parameter identification technology, which is applied in the control of electromechanical transmission, motor generator control, electronic commutation motor control, etc., can solve the problems of increased complexity of identification methods, achieve accurate phase difference, ensure accuracy, and process The effect of simple method

Inactive Publication Date: 2008-03-26
SOMER LEROY ELECTRO TECH FUZHOU CO LTD
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Problems solved by technology

And this one by I m · cosθ and I m · sin θ processing to get I m *I m steps to further increase the complexity of existing identification methods

Method used

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  • A rotation blocking parameter recognition method and device for asynchronous motor
  • A rotation blocking parameter recognition method and device for asynchronous motor
  • A rotation blocking parameter recognition method and device for asynchronous motor

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Embodiment Construction

[0032] The present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0033]The present invention discloses an off-line identification method with high precision, simple operation and wide application in engineering. As shown in Fig. 2, the method of the present invention is used in a voltage-type AC-DC-AC frequency conversion speed regulation system An off-line parameter identification method, which is based on the steady-state equivalent circuit of the motor shown in Figure 3, and the identified parameters are all parameters in the steady-state equivalent circuit. Include the stator resistance r in the motor steady-state equivalent circuit shown in Figure 3 1 , Stator leakage inductance L 1 , rotor resistance r 2 , rotor leakage inductance L 2 , The equivalent resistance of the excitation winding r m , The equivalent inductance of the excitation winding L m Composed of excitation branch. ...

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Abstract

This invention discloses a method and a device for identifying lock parameter of an asynchronous motor, in which, the method includes the following steps: the winding of one phase in the asynchronous motor is open and a sine AC current of a certain frequency is applied onto the windings of the other two phases, and a current amplitude value is tested according a current instant value flowing through said two phase windings in terms of a sampling period, when said motor is stable, the voltage amplitude between the two phase widnings is tested and phase difference of voltage and current according to the voltage phase value corresponding to zero instant current value is tested.

Description

technical field [0001] The invention relates to a method for identifying a stall parameter of an asynchronous motor, and the invention also relates to a device for identifying a stall parameter of an asynchronous motor. Background technique [0002] The vector control system of asynchronous motor is a frequency conversion speed regulation system with high speed precision and instantaneous torque controllable based on the magnetic field orientation method based on the constant rotor flux. The performance of the vector control system depends entirely on the accuracy of the motor parameters, and the inaccuracy of the motor parameters will directly lead to the decline of the performance index of the vector control and even the failure of the frequency converter. [0003] The block diagram of a common vector control system is shown in Figure 1. In Figure 1, the motor parameters are used in the motor dynamic model calculation and speed identification, it can be seen that the moto...

Claims

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Application Information

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IPC IPC(8): H02P21/14
Inventor 彭敏志
Owner SOMER LEROY ELECTRO TECH FUZHOU CO LTD
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