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Parameter estimating method and parameter estimating device of embedded permanent magnet synchronous motor

A permanent magnet synchronous motor, parameter estimation technology, applied in the control of electromechanical transmission, generator control, motor control, etc., can solve problems such as rotor position error, reduce execution time, easy application, accuracy and stability high effect

Active Publication Date: 2017-05-10
GAC AION NEW ENERGY AUTOMOBILE CO LTD
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Problems solved by technology

However, the parameters measured offline have certain limitations, either the motor parameters are obtained in a specific environment, or only a subset of the motor parameters are identified, or the identified parameters are not sensitive to the error of the rotor position

Method used

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  • Parameter estimating method and parameter estimating device of embedded permanent magnet synchronous motor
  • Parameter estimating method and parameter estimating device of embedded permanent magnet synchronous motor
  • Parameter estimating method and parameter estimating device of embedded permanent magnet synchronous motor

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Embodiment Construction

[0063] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0064] Please refer to figure 1 As shown, the first embodiment of the present invention provides a parameter estimation method of an embedded permanent magnet synchronous motor, including:

[0065] Step S1, query the table of stator winding resistance change with temperature according to the stator winding temperature to obtain the corresponding stator winding resistance, query the table of rotor permanent magnetic flux change with temperature according to the estimated value of rotor temperature, and obtain the corresponding rotor permanent magnetic flux;

[0066] In step S2, the stator winding resistance and the rotor permanent magnet flux obtained in step S1 are used as the parameters of the state equation of the embedded permanent magnet synchronous motor, and the direct-axis inductance and the quadrature-axis inductance are identified by the recursive l...

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Abstract

The invention provides a parameter estimating method and a parameter estimating device of an embedded permanent magnet synchronous motor, wherein the parameter estimating method comprises the steps of S1, searching a stator winding resistance change table along with temperatures according to a stator winding temperature, obtaining a corresponding stator winding resistance, searching a rotor permanent magnet flux linkage change table along with temperatures according to an estimated rotor temperature, and obtaining a corresponding rotor permanent magnet flux linkage; and S2, using a stator winding resistance and the rotor permanent magnet flux linkage as parameters of an embedded permanent magnet synchronous motor state equation, and identifying a d-axis inductance and a q-axis inductance by means of a recursion least square method. According to the parameter estimating method and the parameter estimating device, table searching results of the stator winding resistance and the rotor permanent magnetic flux linkage are used as given parameters of the recursion least square method, thereby realizing relatively high accuracy and relatively high stability according to a real-time working condition change, reducing algorithm execution time and realizing easy practical application.

Description

Technical field [0001] The invention relates to the technical field of automobiles, and in particular to a parameter estimation method and device of an embedded permanent magnet synchronous motor. Background technique [0002] Permanent magnet synchronous motors are widely used in high-performance motion control applications due to their high power density, low moment of inertia, and high efficiency. In recent years, the development of electric vehicles has been very rapid, and permanent magnet synchronous motors have been widely used in this field due to the above advantages. [0003] As the world pays more and more attention to energy issues, the development of motor controllers towards high efficiency, high control performance and high reliability has become a trend. For the permanent magnet synchronous motor controller, in order to achieve high efficiency and high control performance, it is necessary to have a comprehensive and accurate understanding of the parameters of the c...

Claims

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Application Information

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IPC IPC(8): H02P21/14H02P25/022
CPCH02P21/14H02P21/141H02P2207/05
Inventor 黄慈梅夏铸亮李乐荣廖展图唐君华
Owner GAC AION NEW ENERGY AUTOMOBILE CO LTD
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