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Salient pole wound rotor asynchronous motor

A technology for asynchronous motors and wound rotors, which is applied in the manufacture of stator/rotor bodies, windings, electric components, etc., can solve the problems of complex electromagnetic action mechanism, achieve high rotor winding utilization, improve waveform and three-phase symmetry, The effect of reducing radial size

Inactive Publication Date: 2009-02-18
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the mechanism of electromagnetic action in a salient pole wound rotor asynchronous motor is more complex than that of ordinary synchronous and asynchronous motors

Method used

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  • Salient pole wound rotor asynchronous motor
  • Salient pole wound rotor asynchronous motor
  • Salient pole wound rotor asynchronous motor

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Embodiment Construction

[0022] Such as figure 2 As shown, the present invention includes two main parts of a stator 1 and a rotor 2 . The stator 1 has the same structure as the stator of an ordinary AC motor. The stator core 11 made of slotted silicon steel sheets and the number of phases embedded in the core slots are m 1 , the stator windings 12 with the number of pole pairs P are jointly formed. The rotor 2 is similar to the rotor structure of a common salient pole synchronous motor, and the number of salient poles on the rotor 2 is n p , n p A convex magnetic pole 21 is evenly distributed on the circumference of the back yoke 22, and the convex magnetic pole 21 is covered with an AC coil 23, but the damping winding in the conventional synchronous motor rotor is canceled on the rotor magnetic pole.

[0023] The number of salient poles on the salient pole rotor n p satisfy:

[0024] 2Pp <4P (1)

[0025] That is, the number of salient poles n p More than the number of magnetic field poles, b...

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Abstract

A salient pole wound rotor asynchronous motor includes two parts of stator and rotor. The stator is composed of an armature core stacked by grooving silicon steel sheet and m1 phase P symmetrical alternating current winding embedded in the iron-core groove; the rotor is provided with np convex magnetic poles locating on the circumference uniformly and back yoke iron, wherein the np meeting the relation: 2P < np < 4P, and the np being the power function of the rotor phase number m2. An AC coil is embedded on each of the rotor salient pole, np salient poles correspond to np AC coils, which are divided into m2 groups on relative positions in the central line of the salient poles in a air-gap magnetic field, the coils of each group being linked to form phase windings based on the polar of the magnetic field; and infusing symmetrical AC current with rotary difference frequency of m2 into the rotor m2 phase windings. The motor of the invention can improve operation performance of the salient pole wound rotor asynchronous motor, and be suitable for the fields of wind power generation, hydraulic power generation and industry velocity modulation and the like.

Description

technical field [0001] The invention relates to a motor, in particular to a salient pole winding rotor asynchronous motor. Background technique [0002] Wound rotor asynchronous motor is an asynchronous motor with AC windings on the rotor, which are led out through slip rings and brushes. Properly controlling the amplitude, frequency, phase and phase sequence of the rotor current of this motor through a power electronic converter or an adjustable resistance box can make it run at a variable speed within a certain range of synchronous speed, and its stator winding is directly connected to the motor. On the power grid where the frequency and voltage are basically constant. Because the rotor power that needs to be controlled is proportional to the slip, for many typical industrial loads, the actual control power required by the speed control system is only a small part of the load power. Therefore, wound rotor asynchronous motors are widely used in variable-speed constant-fre...

Claims

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Application Information

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IPC IPC(8): H02K1/24H02K3/46H02K3/28H02K15/02
Inventor 柴建云张宙姚若萍
Owner TSINGHUA UNIV
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