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A compound excitation synchronous starting system and method for a synchronous motor

An excitation system and synchronous start technology, applied in the direction of starting devices, etc., can solve the problems of synchronous brushless electric excitation motor start-up difficulty, synchronous brushless electric excitation generator start-up difficulty, etc., to achieve simplified towing test equipment, large excitation Current adjustment range, output power smooth and continuous effect

Active Publication Date: 2011-12-21
GUANGZHOU YATU NEW ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One of the technical problems to be solved by the present invention is to provide a synchronous starting system with compound excitation of synchronous motors, which solves the problem of difficult starting of synchronous brushless electric excitation motors
[0005] The second technical problem to be solved by the present invention is to provide a synchronous starting system for wind power generators, which solves the problem of difficult starting of synchronous brushless electric excitation generators
[0006] The third technical problem to be solved by the present invention is to provide a synchronous starting method for synchronous motor compound excitation, which solves the problem of difficult starting of synchronous brushless electric excitation motor

Method used

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  • A compound excitation synchronous starting system and method for a synchronous motor
  • A compound excitation synchronous starting system and method for a synchronous motor
  • A compound excitation synchronous starting system and method for a synchronous motor

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Embodiment 1

[0035] A synchronous start-up system for compound excitation of a synchronous motor, comprising a main motor 1, an exciter 2, a rotating rectifier 3, a first excitation system 5 and a second excitation system 4; the main motor rotor 11, the exciter rotor 21 and the rotating rectifier Disk 3 is synchronized. In this embodiment, the first excitation system 5 and the second excitation system 4 are excitation cabinets, which are convenient for transportation and deployment. The rotating rectifier disc 3 controls the conduction angle of the diode by a thyristor, thereby changing the overcurrent capability of the diode; the first excitation system 5 provides excitation current to the stator of the exciter 2; the rotor of the exciter 2 passes through The rotating rectifying disc 3 provides excitation current to the rotor of the main motor 1 . A synchronous slip ring 6 is provided between the rotating rectifier disc 3 and the rotor of the main motor 1, and the slip ring 6 rotates wit...

Embodiment 2

[0046] Such as figure 1 , 3 As shown, a vertical axis wind power generator includes a tower column 9, a wind wheel 10 located on the tower column 9, a main motor 1 and an exciter 2, the main motor 1 and the exciter 2 are external rotor structures, and the main motor The stator 12 and the exciter stator 22 hug the tower 9 tightly, and the wind wheel 10 , the rotor 11 of the main motor and the rotor 21 of the exciter are connected into one body and can rotate around the tower 9 synchronously. A rotating rectifying device is provided between the main motor 1 and the exciter 2. This embodiment is a rotating rectifying disc 3. The rotating rectifying device controls the conduction angle of the diode by a silicon controlled rectifier, thereby changing the overcurrent capability of the diode. The rotating rectifying device and the Main motor, rotor 11 and exciter rotor 21 are synchronized. The exciter 2 is controlled by a first excitation system 5 which supplies an excitation curre...

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Abstract

The invention relates to hybrid excitation synchronous starting system and method of a synchronous motor. The hybrid excitation synchronous starting system comprises a main motor, an exciter, a rotating rectifying disc, a first excitation system and a second excitation system, wherein a main motor rotor, an exciter rotor and the rotating rectifying disc are synchronous; the exciter rotor suppliesexcitation currents to the main motor rotor through the rotating rectifying disc; the first excitation system supplies the excitation currents to an exciter stator; a synchronous slip ring is arranged between the rotating rectifying disc and the main motor rotor and provided with a carbon brush, and the second excitation system supplies the excitation currents to the main motor rotor through the carbon brush and the slip ring. When the hybrid excitation synchronous starting system disclosed by the invention is started, firstly a magnetic field of the main motor rotor is established depending on the second excitation system so that the main motor can be started, then the first excitation system is started and gradually switched with the second excitation system; and in addition, according to the hybrid excitation synchronous starting system disclosed by the invention, the magnetic field is established for the main motor rotor through the second excitation system, and therefore the problem that a synchronous brushless motor can not directly conduct the excitation currents through twice electrical isolation until the magnetic field of the main motor rotor is solved.

Description

technical field [0001] The invention relates to the starting of a synchronous motor, in particular to a starting system and method of a synchronous brushless electric excitation motor. Background technique [0002] The synchronous brushless electric excitation motor achieves electrical isolation because the stator and rotor of the exciter are electrically isolated, and the electrical isolation is realized between the exciter and the main motor due to the rotating rectifier disc (a certain working voltage is required to conduct). Therefore, to successfully start the synchronous The motor must establish a main rotor magnetic field to facilitate the coupling of the rotor magnetic field and the stator magnetic field to generate sufficient starting torque to achieve synchronous rotation of the motor. [0003] At present, many special occasions require synchronous brushless electric excitation motors to operate as synchronous motors. When starting, synchronous brushless electric e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/20
Inventor 邓允河
Owner GUANGZHOU YATU NEW ENERGY TECH
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