Brushless double-feedback motor of winding rotor

A technology of doubly-fed motors and wound rotors, which is applied to asynchronous induction motors, electromechanical devices, electrical components, etc., and can solve the problems of slot space utilization, effective conductor utilization of rotor windings, low winding coefficients, etc.
CN102412684AInactive Publication Date: 2012-04-11HUAZHONG UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN ยท China
Current Assignee / Owner
HUAZHONG UNIV OF SCI & TECH
Publication Date
2012-04-11
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

The invention discloses a brushless double-feedback motor of a winding rotor, which belongs to winding rotor motors. The problems of low slot space utilization rate, effective conductor utilization rate of a rotor winding and winding coefficient of a traditional brushless double-feedback motor of the winding rotor are solved. A power winding and a control winding which are mutually independent are arranged on a stator; Z rotor slots and m phase rotor windings are distributed on a rotor core; each phase rotor winding is provided with a parallel branches; each parallel branch consists of two or three coil groups; first, second and third pitches which are different are respectively adopted in coils with different turn numbers in the first, second and third coil groups; the coils in each coil group are connected in series; and each coil group is in short-circuit connection. The turn number of each winding coil can be flexibly adjusted; the slot space utilization rate, the effective conductor utilization rate of the rotor winding and the winding coefficient can be improved by 5 to 15 percent; and other harmonic waves are inhibited and the content of the harmonic waves is reduced to the maximal degree.
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Description

technical field

[0001] The invention belongs to a wound rotor motor, in particular to a wound rotor brushless double-fed motor, the rotor of which adopts coil structures with unequal pitches and unequal turns. Background technique

[0002] Brushless doubly-fed motors have broad application prospects in large-capacity AC frequency conversion speed regulation, marine shaft power generation, hydropower generation and wind power generation. The structure is simple, durable, and brushes and slip rings are eliminated on the rotor, so the operation is safe and reliable. The maintenance cost is low, and its biggest advantage is that the capacity of the required frequency converter is small, which can reduce the system cost. The brushless double-fed motor is an AC induction motor composed of two sets of stator windings and rotors with different pole pairs. The two sets of stator windings are called power windings and control windings. rotor. The basic principle of the brushless dou...

Claims

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