Initial startup method for biaxial contra-rotating permanent-magnet brushless direct-current motor

A permanent magnet brushless DC, a pair of technology, applied in the direction of the starter of a single DC motor, the deceleration device of the AC motor, the motor generator/starter, etc., can solve the problems that the invention cannot be realized, the description is not clear, etc., to achieve No start-up dead zone problem, avoid table look-up method, accurate calculation of angle
CN104638992AInactive Publication Date: 2015-05-20NORTHWESTERN POLYTECHNICAL UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NORTHWESTERN POLYTECHNICAL UNIV
Publication Date
2015-05-20
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides an initial startup method for a biaxial contra-rotating permanent-magnet brushless direct-current motor. According to the method, a startup process is divided into two stages according to the characteristics of an initial startup process of the biaxial contra-rotating permanent-magnet brushless direct-current motor; at the first stage, aiming at the two-phase-conduction three-phase-star-shape six-state driven biaxial contra-rotating permanent-magnet brushless direct-current motor, a first-stage phase commutation control table of the biaxial contra-rotating permanent-magnet brushless direct-current motor in initial 144 states of inner and outer rotors is formulated according to an advanced phase commutation principle; a conduction code calculation method is summed up through the initial phase commutation control table, and a conduction code can be quickly calculated in a DSP (Digital Signal Processor) without querying a phase commutation table, so as to realize the initial rotation of the motor.
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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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