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A doubly-fed electric excitation synchronous motor

A synchronous motor and electric excitation technology, which is applied to synchronous motors, electromechanical devices, electrical components, etc. for single-phase current, can solve problems such as low torque density, reduce thermal load, improve flexibility, and reduce cooling hardware The effect of equipment requirements

Active Publication Date: 2021-02-09
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] As mentioned above, one of the disadvantages of doubly salient electric excitation synchronous motors is its relatively low torque density. If the torque density can be further improved while maintaining its existing advantages, the competitiveness of this type of motor will be greatly increased.

Method used

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  • A doubly-fed electric excitation synchronous motor
  • A doubly-fed electric excitation synchronous motor
  • A doubly-fed electric excitation synchronous motor

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Experimental program
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Effect test

Embodiment 1

[0046]This embodiment mainly introduces the case where the primary iron core is formed by combining several primary iron core blocks in the circumferential direction.

[0047]Such asfigure 1 Shown is a double-fed electric-excited synchronous motor with 12-slot primary / ten-slot secondary, including primary, secondary and shaft 3: the primary is located outside the secondary; the secondary is fixed on the shaft 3; the primary includes the primary Iron core 1, field winding 41 and primary armature winding 42; among them, the primary iron core 1 is composed of twelve primary iron core blocks, and two adjacent primary iron core blocks are connected by a magnetic bridge 7; each A primary iron core block includes a primary iron core yoke 11 and a primary iron core tooth 12;

[0048]The primary iron core teeth 12 form a first primary iron core groove 8 and a second primary iron core groove 9, wherein the first primary iron core groove 8 refers to the groove inside each primary iron core block, an...

Embodiment 2

[0063]Different from the primary iron core 1 in the first embodiment which is a block-combined structure, this embodiment mainly introduces the case where the primary iron core is an integrated structure.

[0064]Such asFigure 7 Shown is a doubly-fed electric excitation synchronous motor with six-slot primary / four-slot secondary,

[0065]In this solution, the primary winding 4 serves as both the field winding and the armature winding. The primary winding 4 adopts a double-layer concentrated armature winding, and the secondary winding 6 adopts a single-layer distributed armature winding. The two sides of the primary coil are placed in two adjacent primary core slots, and the secondary slots on both sides of the secondary coil are two teeth apart, a secondary slot, and two primary coils separated by half a circle are connected in series to form a phase primary winding. In this solution, the secondary is the rotating part, and the secondary winding 6 is connected to the power supply through ...

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Abstract

The invention discloses a doubly-fed electric excitation synchronous motor, which includes a primary and a secondary with a salient pole structure, the primary includes a primary iron core and a primary winding, and the primary iron core includes primary iron core teeth and primary iron cores. core yoke, the primary winding is arranged in the primary iron core slot formed between the teeth of the primary iron core, the primary winding includes an excitation winding and an armature winding; the secondary includes a secondary iron core, the secondary The secondary iron core includes secondary iron core teeth and a secondary iron core yoke, and the secondary further includes a secondary winding, and the secondary winding is arranged in a secondary iron core slot formed between the secondary iron core teeth, so The secondary windings include secondary armature windings. Utilizing the present invention, on the basis of not changing the volume of the original motor, the excitation magnetic field can be generated through the excitation winding, and the rotor slot space of the motor can be fully utilized to install the secondary winding, so that the motor has two sets of primary and secondary windings, thereby improving The power density and control flexibility of the motor are improved.

Description

Technical field[0001]The invention relates to the technical field of motors, and in particular to a double-fed electric excitation synchronous motor.Background technique[0002]In recent years, the research and development of doubly salient synchronous motors is in a rapid development stage. Compared with other types of motors, doubly salient synchronous motors have the advantages of simple structure and strong reliability. Among them, the doubly salient permanent magnet synchronous motor with a strong excitation source has a significant advantage of higher power density, but due to the high price of rare earth permanent magnets, the manufacturing cost of the doubly salient permanent magnet synchronous motor remains high. Relatively speaking, it is more economical to use traditional electric excitation method to replace permanent magnet materials. In addition, electric excitation can realize the flexible regulation of magnetic field strength and direction, and there is no risk of irre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K19/02H02K3/18H02K11/20H02K11/30
CPCH02K3/18H02K19/02H02K11/20H02K11/30
Inventor 吴立建方攸同王文婷方立闻汇
Owner ZHEJIANG UNIV