Off-line recognition method for alternating current asynchronous motor mutual inductance parameters

An AC asynchronous motor and parameter technology, which is applied in the estimation/correction of motor parameters, etc., can solve the problems of complex offline parameter identification methods and difficult implementation, and achieve the effect of convenient engineering implementation and simple identification methods.

Active Publication Date: 2014-06-25
NEW UNITED GROUP
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is: in order to solve the problem that the traditional offline parameter identification method for AC asynchronous motors is complex and difficult to implement, the present invention provides an offline identification method for mutual inductance parameters of AC asynchronous motors to solve the above problems

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  • Off-line recognition method for alternating current asynchronous motor mutual inductance parameters
  • Off-line recognition method for alternating current asynchronous motor mutual inductance parameters
  • Off-line recognition method for alternating current asynchronous motor mutual inductance parameters

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[0055] The present invention is described in further detail now in conjunction with accompanying drawing. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the configurations related to the present invention.

[0056] The invention provides an off-line identification method of the mutual inductance parameters of an AC asynchronous motor, such as figure 1 As shown, based on the AC asynchronous motor, the inverter connected to the input end of the AC asynchronous motor, the controller that controls the output current of the inverter through the PWM signal, and the sensor used to detect the current of the AC asynchronous motor, the inverter is connected with DC steady-state power supply. The sensor transmits the detected current to the controller for adjusting the PWM signal. After the AC asynchronous motor, a torque meter and a dynamometer are connected in turn. The AC...

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Abstract

The invention provides an off-line recognition method for alternating current asynchronous motor mutual inductance parameters. An inverter based on an alternating current asynchronous motor and connected with the input end of the alternating current asynchronous motor, a controller controlling the inverter to output currents through PWN signals and a sensor used for detecting currents of the alternating current asynchronous motor are included. The sensor transmits detected currents to the controller for adjusting the PWM signals. The alternating current asynchronous motor comprises a stator and a rotor. According to the off-line recognition method for alternating current asynchronous motor mutual inductance parameters, no extra devices or circuits are needed, only the resistance value of the fixed rotor of the alternating current asynchronous motor needs knowing, the measurement of the resistance value of the fixed rotor of the alternating current asynchronous motor is simple, the precision of parameters can meet FOC control requirements, and the purpose that the alternating current asynchronous motor recognizes mutual inductance parameters on the static condition is achieved. The recognition method is simple and brings convenience to project implementation.

Description

technical field [0001] The invention relates to an AC asynchronous motor, in particular to an off-line identification method for mutual inductance parameters of an AC asynchronous motor. Background technique [0002] At present, with the rapid development of motor control technology, AC asynchronous motor drive systems are used more and more widely. For a long time before, the control algorithm used in the AC asynchronous motor drive system was mainly VF frequency conversion control, but with the introduction of the field-oriented control algorithm (FOC), many products began to use a large number of FOC control algorithms in order to improve their performance. used in the control program. The AC asynchronous motor FOC control algorithm needs some internal parameters of the motor. The estimation of the mutual inductance parameters includes two parts: offline parameter identification and online parameter correction. Off-line parameter identification refers to applying a serie...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P23/14
Inventor 龚旦高明强陆斌董苗苗
Owner NEW UNITED GROUP
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