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Self-anti-interference starting method for permanent magnetic synchronous motor

A permanent magnet synchronous motor and self-disturbance rejection technology, which is applied in the control of generators, motor generators, electromechanical brakes, etc., can solve problems such as motor starting failure and affecting system performance

Active Publication Date: 2015-05-13
HANGZHOU VANGO TECH
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AI Technical Summary

Problems solved by technology

[0003] The permanent magnet synchronous motor control system without a position sensor needs to estimate the position of the rotor through an algorithm, especially the initial position of the rotor is a very important quantity. If the initial position is not estimated accurately, it may reverse when the motor starts or cause The motor fails to start and affects the running performance of the system after starting

Method used

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  • Self-anti-interference starting method for permanent magnetic synchronous motor
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  • Self-anti-interference starting method for permanent magnetic synchronous motor

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Embodiment Construction

[0030] The self-disturbance rejection starting method of the permanent magnet synchronous motor proposed by the present invention, its flow chart is as follows figure 2 shown, including the following steps:

[0031] On the field-oriented coordinates, the current vector of the permanent magnet synchronous motor is decomposed into the excitation current component i that generates the magnetic flux d and torque-generating torque current component i q , and make the excitation current component i d and the torque current component i q Perpendicular to each other;

[0032] image 3 is the stator voltage space vector diagram of the permanent magnet synchronous motor. There are two coordinate systems used in vector control, one is a static coordinate system and the other is a rotating coordinate system. The three-phase stator A-B-C coordinate system based on the three-phase winding of the three-phase stator and the two-phase stator α-β coordinate system composed of the α axis ...

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Abstract

The invention relates to a self-anti-interference starting method for a permanent magnetic synchronous motor, and belongs to the technical field of motor driving. The method comprises the steps as follows: detecting and judging the bus current and counter-electromotive force of a permanent magnetic synchronous motor inverter in real time to enable the permanent magnetic synchronous motor inverter to execute waiting, compulsive stop instruction or to be switched into a pre-start mode; setting periodic start time Tn and restart times w to enable the permanent magnetic synchronous motor to be started at a time after the periodic start time Tn, the start times of the permanent magnetic synchronous motor is less than or equal to the restart times w, and fault information is sent to the permanent magnetic synchronous motor if the start fails; and as regards an initial position detection module, exerting a series of voltage pulse with the same size and different directions to a stator winding and detecting the corresponding current of the stator winding to acquire an initial position. The starting method improves the start reliability of the permanent magnetic synchronous motor, reduces damages to the motor caused by frequent controller start, increases the angle control precision of a wireless sensor, and improves the performances of a motor control system.

Description

technical field [0001] The invention relates to an anti-disturbance starting method for a permanent magnet synchronous motor, which belongs to the technical field of motor drive. Background technique [0002] The permanent magnet synchronous motor is a new type of synchronous motor composed of rare earth permanent magnets instead of field windings. It has the advantages of simple structure, small size, light weight, high efficiency, high power factor, no heating problem of the rotor, large overload capacity, small moment of inertia and small torque ripple. Motion control of permanent magnet synchronous motors requires precise rotor position and velocity signals to achieve field orientation. In traditional motion control systems, resolvers or photoelectric encoders are usually used to detect the position and speed of the rotor. However, these additional sensors, connectors, cables, etc. increase the cost of the system and reduce the reliability of the system. Therefore, el...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/14H02P21/24H02P21/34H02P27/08
Inventor 高强张岳
Owner HANGZHOU VANGO TECH
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