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DC pre-excitation starting method of asynchronous motor based on flux compensation and deviation decoupling

An asynchronous motor and flux linkage compensation technology, which is used in motor generator/starter, starter of a single multi-phase induction motor, control generator, etc., can solve the problem that high-power motors cannot be considered at the same time, and the strong coupling start performance is reduced. and other problems, to achieve good decoupling effect, reduce starting current, and improve torque response speed.

Active Publication Date: 2018-11-23
HENAN UNIV OF SCI & TECH
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Problems solved by technology

Although the above starting methods can meet the requirements in some aspects of improving the starting performance of the motor, sometimes these two indicators cannot be considered at the same time for high-power motors, mainly because the dynamic mathematical model of the asynchronous motor is a nonlinear, high-order, strong coupling The multi-variable system, the fluctuation of the flux linkage amplitude at the start time and the strong coupling of the whole system make the start-up performance degrade

Method used

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  • DC pre-excitation starting method of asynchronous motor based on flux compensation and deviation decoupling
  • DC pre-excitation starting method of asynchronous motor based on flux compensation and deviation decoupling
  • DC pre-excitation starting method of asynchronous motor based on flux compensation and deviation decoupling

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Embodiment Construction

[0017] Such as Figure 1 to Figure 3 As shown, the asynchronous motor DC pre-excitation starting method based on flux linkage compensation and deviation decoupling of the present invention is provided with a sampling module, a flux linkage error compensation module, a deviation decoupling module, a pre-excitation module, an inverter module and digital signal processing Module implementation, including the following steps:

[0018] Step 1: The sampling module collects the rotor angular velocity ω of the asynchronous motor, and compares it with the given rotor angular velocity ω * Input the speed regulator of the sampling module, the output slip of the speed regulator ω s ; Collect the three-phase current value i of the asynchronous motor A i B and i C , so that the torque current value i can be obtained through the digital signal processing module through 3s / 2r transformation sq and excitation current value i sd The analog signal, and finally the torque current value i s...

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Abstract

The present invention belongs to the field of the asynchronous motor, and discloses an asynchronous motor direct current pre-excitation starting method based on linkage compensation and deviation decoupling. The objective of the invention is to reduce the starting current when the motor is started, inhibit the generation of the peak current and generate a fast torque response speed. The asynchronous motor direct current pre-excitation starting method based on linkage compensation and deviation decoupling can set the exciting current and the torque current through the pre-excitation control and perform amplitude limiting to allow the motor to build the exciter field in advance before starting, the whole dynamic process employs the linkage error compensation to maintain the linkage stability, and the deviation decoupling can realize the good decoupling effect of the whole control system. The asynchronous motor direct current pre-excitation starting method based on linkage compensation and deviation decoupling can reduce the starting current of the motor, improve the torque response speed and obtain the better effect.

Description

technical field [0001] The invention belongs to the field of asynchronous motors, and in particular relates to a DC pre-excitation starting method for asynchronous motors based on flux compensation and deviation decoupling. Background technique [0002] The two important indicators in the starting performance of the motor generally hope that the starting peak current is small and the output torque response speed is fast. The conventional motor starting methods include direct start, autotransformer step-down start, Y-△ step-down Start, soft start, variable frequency start, etc. Although the above starting methods can meet the requirements in some aspects of improving the starting performance of the motor, sometimes these two indicators cannot be considered at the same time for high-power motors, mainly because the dynamic mathematical model of the asynchronous motor is a nonlinear, high-order, strong coupling The multi-variable system, the fluctuation of the flux linkage amp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P1/26H02P21/34H02P21/12
CPCH02P1/26H02P21/12
Inventor 范波曾佳王珂张帆
Owner HENAN UNIV OF SCI & TECH
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