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Synchronous motor excitation system

A technology of synchronous motor and excitation system, applied in control system, motor control, AC motor control and other directions, can solve the problems of synchronous motor loss of magnetization and out-of-step shutdown and other problems

Active Publication Date: 2021-05-18
武汉钢铁有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the disadvantage of this exciter is that when the three-phase power supply disappears or the three-phase thyristor static voltage regulator fails, the synchronous motor will lose its excitation and stop.

Method used

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Embodiment Construction

[0025] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0026] See figure 1 , shows a schematic structural diagram of a synchronous motor excitation system 100 provided by the first embodiment of the present invention. The synchronous motor excitation system 100 includes: a redundant PLC (Programmable Logic Controller, programmable logic controller) 11, a first intelligent voltage regulator 21, a second intelligent voltage regulator 22 and a synchronous motor SM; specifically, the first...

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Abstract

The invention discloses a synchronous motor excitation system which comprises a redundant PLC, a first intelligent voltage regulator, a second intelligent voltage regulator and a synchronous motor. The first intelligent voltage regulator and the second intelligent voltage regulator are connected in parallel and then are connected with the synchronous motor, and the first intelligent voltage regulator and the second intelligent voltage regulator are both connected with the redundant PLC; the first intelligent voltage regulator is used for stopping working when a fault occurs and sending a fault signal to the redundant PLC; and the redundant PLC is used for starting the second intelligent voltage regulator to work when the fault signal is received. The stability of the excitation system of the synchronous motor can be improved, and excitation loss of the synchronous motor caused by faults of the voltage regulator is avoided.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to an excitation system of a synchronous motor. Background technique [0002] At present, a large number of synchronous motors use AC exciters. The stator and rotor of this exciter use three-phase AC windings, and the rotor is equipped with a rotating rectifier. This kind of exciter is simple in structure, small in size, completely brushless, and can provide excitation when it is stationary, and is especially suitable for static variable frequency starting. However, the disadvantage of this exciter is that when the three-phase power supply disappears or the three-phase thyristor static voltage regulator fails, the synchronous motor will lose its excitation and stop. Contents of the invention [0003] In view of the above problems, the present invention proposes an excitation system of a synchronous motor, which can improve the stability of the excitation system of a synchronous mo...

Claims

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Application Information

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IPC IPC(8): H02P29/024H02P25/022H02P6/28
CPCH02P29/025H02P25/022H02P6/28Y02P80/10
Inventor 邓继红杨青云
Owner 武汉钢铁有限公司
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