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Variable frequency independent speed motor

An electric motor and reference frequency technology, applied in the field of variable frequency independent speed motors, can solve the problems of increasing heavy weight and power loss, etc.

Pending Publication Date: 2019-11-26
THE BOEING CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This full-scale power conversion can result in significant power loss
Further, the components required to perform power conversion may add significant weight, which may not be desirable in certain applications, such as within an aircraft

Method used

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  • Variable frequency independent speed motor
  • Variable frequency independent speed motor
  • Variable frequency independent speed motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] refer to figure 1 , depicts an embodiment of a variable frequency independent speed motor system 100 . System 100 may include a rotor 102 and a stator 104 . The system may also include a high frequency transformer stage 106 and a main field stage 108 .

[0026] The high frequency transformer stage 106 may include a first set of transformer windings 110 and a second set of transformer windings 112 . A first set of transformer windings 110 may be coupled to and located on the stator 104 and a second set of transformer windings 112 may be coupled to and located on the rotor 102 . The first set of transformer windings 110 and the second set of transformer windings 112 may include 3-phase windings for sending excitation signals from the stator 104 to the rotor 102 .

[0027] As used herein, high frequency means that the frequency of the signal is greater than the rotational frequency of the rotor 102 . For example, as the frequency of the excitation signal to be sent fro...

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PUM

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Abstract

The invention provides a variable frequency independent speed motor. An electric motor apparatus may include a rotor and a stator. The apparatus may include a main field motor stage having a set of stator armature windings positioned on the stator and a set of main field windings positioned on the rotor, where the set of stator armature windings is configured to receive a main multiphase power signal from an alternating current power bus having a first current that causes a first rotating magnetic flux that rotates relative to the stator, where the set of main field windings is configured to receive a secondary multiphase power signal having a second current that causes a second rotating magnetic flux that rotates relative to the rotor, and where a combination of the first rotating magnetic flux and the second rotating magnetic flux causes the rotor to turn at a predetermined reference frequency.

Description

technical field [0001] The present disclosure relates generally to multiphases motors, and more particularly to variable frequency independent speed motors. Background technique [0002] A typical induction motor includes an active set of multiphase windings coupled to the stator and a passive (or reactive) set of multiphase windings coupled to the rotor. A multiphase power signal is applied to the multiphase windings of the active set. The currents generated by the multiphase power signals in the windings of the active set generate magnetic fields that induce reverse currents in the multiphase windings of the passive set. The reverse current causes a reverse magnetic field that turns the rotor. As the rotor turns, the reverse current in the polyphase windings of the passive set decreases, which reduces the magnetic field. The motor is ultimately at a balanced speed based on the load attached to the motor and the frequency of the polyphase power signal. The balancing spe...

Claims

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Application Information

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IPC IPC(8): H02P27/04H02P27/08
CPCH02P27/04H02P27/08H02P9/14H02P21/12H02P2207/01H02M7/003H02M7/4807H02P27/085
Inventor 高利军刘生义
Owner THE BOEING CO
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