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Initial starting method for double-shaft contra-rotating permanent magnet brushless direct current motor

A permanent magnet brushless DC, a pair of technology, applied in the direction of the starting device, etc., can solve the problems of large commutation error, unable to start the motor reliably, etc., to improve operating efficiency, no starting dead zone problem, accurate angle calculation Effect

Inactive Publication Date: 2012-08-01
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The initial start-up process must be carried out according to these 144 states, but if the commutation signal is only triggered by the jumping moment of the position signal, a large commutation error will be generated, and the motor cannot even be started reliably

Method used

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  • Initial starting method for double-shaft contra-rotating permanent magnet brushless direct current motor
  • Initial starting method for double-shaft contra-rotating permanent magnet brushless direct current motor
  • Initial starting method for double-shaft contra-rotating permanent magnet brushless direct current motor

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Embodiment Construction

[0051] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0052] Such as image 3 The shown dual-axis counter-rotating permanent magnet brushless DC motor drive control system consists of DSP, CPLD, IPM, position detection module, voltage and current detection module, voltage conversion module, and communication module.

[0053] Formulate the first stage commutation control table

[0054] Step 1. According to the position signals of the inner rotor U, V, W, A, compile the inner rotor state code D, 0≤D≤11, D∈N;

[0055] Step 2. Compile the external rotor position code Z according to the external rotor U, V, W, A position signals, 0≤Z≤11, Z∈N;

[0056] Step 3. Superimpose the angle intervals of the inner and outer rotors, that is, θ=θ 1 +θ 1 , if θ≥360°, let θ=θ-360°;

[0057] a. IF 0°≤θ<60°C=0;

[0058] b. IF 60°≤θ<120°C=1;

[0059] c. IF 120°≤θ<180°C=2;

[0060] d. IF 180°≤θ<240°C=3;

[0061] e. IF 240°≤θ<300°C...

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Abstract

The invention discloses an initial starting method for a double-shaft contra-rotating permanent magnet brushless direct current motor. A starting process is divided into two stages according to the characteristics of the starting process of the double-shaft contra-rotating permanent magnet brushless direct current motor. In a first stage, a first-stage phase change control table for the double-shaft contra-rotating permanent magnet brushless direct current motor in 144 initial states of an inner rotor and an outer rotor is established according to an advanced phase change principle for the 'two-phase conducted three-phase star-like six-state' driven double-shaft contra-rotating permanent magnet brushless direct current motor. A conduction mark calculation method is summarized by the initial phase change control table, a conduction mark can be rapidly calculated in a digital signal processor (DSP) without looking up the phase change control table, and the initial rotation of the motor is realized.

Description

technical field [0001] The invention relates to an initial starting method of a double-shaft counter-rotating permanent-magnet brushless direct-current motor, which can realize safe and reliable starting of the double-shaft counter-rotating permanent-magnet brushless direct-current motor. Background technique [0002] In ordinary permanent magnet brushless DC motors, only the rotor poles rotate, and its armature is stationary. The double-shaft counter-rotating permanent magnet brushless DC motor based on the principle of action force and reaction force is driven by electromagnetic torque to make the inner and outer rotors rotate in opposite directions at the same time. In the underwater counter-rotating propulsion system, the dual-axis counter-rotating permanent magnet brushless DC motor is used in conjunction with the counter-rotating propeller, which can significantly improve the propulsion efficiency of the underwater vehicle and eliminate the roll caused by the rotation ...

Claims

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Application Information

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IPC IPC(8): H02P6/20
Inventor 张克涵王司令季小尹宋保维胡欲立严卫生
Owner NORTHWESTERN POLYTECHNICAL UNIV
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