Motor stator resistor recognition method

A technology of motor stator and identification method, applied in the fields of electromechanical and servo control, can solve problems such as large amount of calculation, complex algorithm, and difficulty in online identification of stator resistance.

Active Publication Date: 2015-12-02
NANJING ESTUN AUTOMATION CO LTD
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  • Abstract
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Problems solved by technology

[0009] The problem to be solved by the present invention is: the existing technology is difficult to identify the stator resistance online during the normal operation of the motor, the algorithm is complex, and the amount of calculation is large

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Embodiment Construction

[0038] Aiming at the deficiencies in the current motor stator resistance identification methods, the present invention proposes a stator resistance identification method applied to surface-mounted permanent magnet synchronous motors, which can identify the stator resistance of the motor during the operation of the motor, and the identification accuracy is high. The amount of calculation is small, and it is easy to realize engineering.

[0039] The key point of the present invention is that when the motor is running, other items in the voltage equation except the voltage drop of the resistance are eliminated, the voltage and current values ​​are recorded, and finally the resistance value of the resistance is calculated. The invention does not need a lot of calculations, is suitable for the stator resistance identification of the surface-mounted permanent magnet synchronous motor, and realizes the processing of the non-resistance voltage drop in the stator voltage of the motor du...

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Abstract

The invention discloses a motor stator resistor recognition method, and the method is used for a surface-mounted PMSM. The method comprises the steps: building a d-q coordinate system based on rotor flux linkage orientation at first; eliminating a non-resistance voltage drop part in a motor stator voltage equation in an operation process of the surface-mounted PMSM; and calculating the resistance of a stator resistor through the voltage and current of a resistor voltage drop part. The method achieves on-line recognition, also can recognize the resistance value of the stator resistor when the motor operates at different speeds, and can recognize the resistance value, which changes because of the impact of motor temperature, of the stator resistor in real time. Compared with a conventional on-line recognition method, the method just needs voltage and current signals during the calculation of the stator resistor, does not need other parameter information of the motor, is simple in algorithm, is easy to achieve through a DSP, and is higher in recognition precision.

Description

technical field [0001] The invention belongs to the field of electromechanical technology, is used in the field of servo control, relates to motor parameter identification, and specifically relates to a motor stator resistance identification method. Background technique [0002] Motor parameter identification is mainly used in the field of servo control, where the parameters of the motor change due to factors such as temperature during operation, which in turn affects the control effect. It is of great significance to study the identification and update of motor parameters to improve the control performance. [0003] At present, there are many methods for motor parameter identification, among which, the methods for identifying motor stator resistance are mainly divided into offline identification and online identification. Reference 1: Chinese patent application CN201410128726.3 "Stator resistance measurement method, device and temperature detection method, device" proposes...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/14
Inventor 李晋彪齐丹丹孙园园吴波
Owner NANJING ESTUN AUTOMATION CO LTD
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