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A Synchronous Motor Excitation System

A technology of synchronous motor and excitation system, which is applied in control system, motor control, AC motor control, etc. It can solve the problems of synchronous motor loss of excitation and out of step shutdown, and achieve the effect of avoiding loss of excitation and improving stability

Active Publication Date: 2022-06-07
武汉钢铁有限公司
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  • Abstract
  • Description
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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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  • A Synchronous Motor Excitation System
  • A Synchronous Motor Excitation System
  • A Synchronous Motor Excitation System

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Embodiment Construction

[0025] The following will refer to the accompanying drawings to describe in more detail the exemplary embodiments of the present disclosure. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited by the embodiments described herein. Instead, these embodiments are provided in order to be able to more thoroughly understand the present disclosure, and to be able to communicate the scope of the present disclosure completely to those skilled in the art.

[0026] See Figure 1, illustrating a schematic structural diagram of a synchronous motor excitation system 100 provided in a first embodiment of the present invention. Synchronous motor excitation system 100, comprising: redundant PLC (Programmable Logic Controller, programmable logic controller) 11, the first intelligent voltage regulator 21, the second intelligent voltage regulato...

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Abstract

The invention discloses an excitation system of a synchronous motor, comprising: 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 to the The synchronous motor is connected, and the first intelligent voltage regulator and the second intelligent voltage regulator are both connected to the redundant PLC; wherein: the first intelligent voltage regulator is used to stop working in case of failure and send a fault signal to the redundant PLC; The redundant PLC is used to start the second intelligent voltage regulator to work when a fault signal is received. The invention can improve the stability of the excitation system of the synchronous motor and avoid the demagnetization of the synchronous motor caused by the failure of the voltage regulator.

Description

Technical field [0001] The present invention relates to the field of motor technology, in particular to a synchronous motor excitation system. Background [0002] At present, synchronous motors use a large number of AC exciters, which use three-phase AC windings for stators and rotors, and the rotor is equipped with rotary rectifiers. This exciter has a simple structure, small size, completely brushless, and can provide excitation at rest, especially suitable for static frequency conversion start-up. However, the disadvantage of this excitator is that when the three-phase power supply disappears or the three-phase thyristor static voltage regulator fails, the synchronous motor will lose its magnetic device and stop. Contents of the Invention [0003] In view of the above problems, the present invention proposes a synchronous motor excitation system, which can improve the stability of the synchronous motor excitation system, to avoid the synchronous motor demagnetization caused b...

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Application Information

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Patent Type & Authority Patents(China)
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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