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Model reference adaptive flux linkage identification parameter setting method

A technology of flux linkage identification and model reference, which is used in the control of generators, electronic commutation motor control, control systems, etc., can solve problems such as large workload, and achieve the effect of small calculation amount, simple and practical effect

Pending Publication Date: 2020-12-29
THE 724TH RES INST OF CHINA SHIPBUILDING IND
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Problems solved by technology

This method needs to draw multiple root locus diagrams and compare the system step response curves under multiple data, so the actual workload is relatively large

Method used

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  • Model reference adaptive flux linkage identification parameter setting method
  • Model reference adaptive flux linkage identification parameter setting method
  • Model reference adaptive flux linkage identification parameter setting method

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Embodiment Construction

[0015] In order to make the technical means and solutions realized by the present invention easier to understand, the present invention is further described below with reference to the accompanying drawings.

[0016] The differential equation of the q-axis current of the permanent magnet synchronous motor is:

[0017] pi q =(u q -R s i q -ω r L d i d -ω r ψ f ) / L q (1)

[0018] The q-axis current differential equation builds an adjustable model as:

[0019]

[0020] The difference between formula (1) and formula (2) can be obtained:

[0021]

[0022] Using Popov's hyperstability theory, the design adaptation rate is:

[0023]

[0024] From formula (4), we can get figure 1 Error system block diagram shown. Depend on figure 1 A linearized model with actual flux linkage as input and estimated flux linkage as output can be obtained, such as figure 2 shown. Depend on figure 2 The open-loop transfer function of the model can be obtained as:

[0025] ...

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Abstract

The invention discloses a model reference adaptive flux linkage identification parameter setting method, and belongs to the field of permanent magnet synchronous motor parameter identification. According to the method, a model reference adaptive flux linkage identification model is linearized to obtain an open-loop transfer function of the model, when a rotor flux linkage changes with time, a fluxlinkage steady-state error expression can be obtained, and setting of adaptive rate parameters is carried out accordingly.

Description

technical field [0001] The invention belongs to the field of permanent magnet synchronous motor parameter identification. Background technique [0002] In the control of high-performance permanent magnet synchronous motor, the acquisition of motor parameters (resistance, inductance, flux linkage, etc.) is essential. There are usually two methods: offline measurement and online identification. Although the motor parameters can be obtained by using the offline measurement method, the motor parameters will change with the working conditions, so the online parameter identification method has been widely studied by scholars. Permanent magnet synchronous motor parameter identification mainly includes the following algorithms: least squares method, model reference adaptive method, extended Kalman filter method and intelligent algorithm. The model reference adaptive method compares the output of the adjustable model and the reference model, and uses an appropriate adaptive law to c...

Claims

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Application Information

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IPC IPC(8): H02P21/00H02P21/14
CPCH02P21/0017H02P21/141
Inventor 朱瑞杰杜仁慧
Owner THE 724TH RES INST OF CHINA SHIPBUILDING IND
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