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Identification Method of Stator Resistance Parameters of Induction Motor Based on emd-elm

A technology for stator resistance and induction motors, which is applied to the control of generators, motor generators, and electronically commutated motors. The effect of strong generalization ability, recognition speed and accuracy improvement

Active Publication Date: 2019-06-04
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in practical applications, it is necessary to add rotor parameter identification and error correction links to make the identification achieve a rational effect. The algorithm is complex, the amount of calculation is large, and it is not universal.

Method used

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  • Identification Method of Stator Resistance Parameters of Induction Motor Based on emd-elm
  • Identification Method of Stator Resistance Parameters of Induction Motor Based on emd-elm
  • Identification Method of Stator Resistance Parameters of Induction Motor Based on emd-elm

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Embodiment 1

[0078] In this embodiment, the method for identifying the stator resistance parameters of an induction motor based on ELM, the process is as follows figure 1 shown, including the following steps:

[0079] (1) Data collection

[0080] To build a data acquisition platform, the model of the selected induction motor is Y355M2-6. The magnetic powder dynamometer of the model ZF50WKB is used to provide a stable load for the induction motor, and the temperature sensor with a range of 0°C-120°C is used to collect the temperature in real time. Among them, a total of three temperature sensors are evenly embedded in the stator winding. The working frequency is given by the control program and read by the dynamometer; the winding terminal temperature is read by the temperature sensor, the stator voltage and stator current are respectively measured by the voltage and current transformers, the bus voltage and the bus current are measured by the differential in the control circuit The circu...

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Abstract

The invention discloses an induction motor stator resistance parameter recognition method based on EMD-ELM. The method comprises the following steps of firstly, obtaining the stator current, the stator voltage, the bus voltage, the bus current, the work frequency, the winding temperature and the stator resistance data set through data collection; performing normalization and EMD filtering processing on a sampling set; randomly dividing the sample set into a training set and a test set; using the training set to train an ELM network; analyzing the result error through regulating the input and output of the network; determining the ELM network structure to obtain an ELM recognition model; utilizing the test set for inspecting the accuracy of the recognition module, wherein the module output is the final stator resistance recognition result. The induction motor stator resistance parameter recognition method based on EMD-ELM has the advantages that the influence of the stator resistance of the induction motor under the low-speed work condition on the rotor magnetic chain observation in a vector control system can be reduced, so that the stator resistance can be recognized at higher speed with higher precision; the observation effect of the vector control system on a rotor magnetic chain can be effectively improved; the control performance is improved.

Description

technical field [0001] The invention relates to the technical field of motor control, in particular to an EMD-ELM-based identification method for stator resistance parameters of an induction motor. Background technique [0002] In the field of motor control, the most mature control methods are Field Oriented Control (FOC) and Direct Torque Control (Direct Torture Control, DTC). FOC was proposed by Blasehke F. in 1971. According to the dynamic mathematical model of the motor, the vector transformation method is used to realize the decoupling of flux linkage and torque, and the two are controlled independently, which can significantly improve the control performance. However, this method is highly dependent on the motor parameters, and the motor parameters are time-varying, so it is difficult to achieve an ideal control effect. In the speed sensorless AC speed control system, the temperature change and the skin effect will cause the stator resistance to change to a certain ex...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/14
CPCH02P21/14
Inventor 张旭东于杏应展烽陈远晟唐莹莹杨帆
Owner NANJING UNIV OF SCI & TECH
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