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Excitation control method and excitation control device after asynchronous starting of synchronous motor

A synchronous motor and asynchronous starting technology, which is applied in the field of ship control and control, can solve the problems of motor and power supply system hazards, large inrush current, etc., and achieve the effect of improving system safety and reliability and eliminating excitation shock

Active Publication Date: 2015-07-08
镇江赛尔尼柯自动化股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] When PTI is connected to the excitation system after asynchronous starting, if the physical magnetic poles of the rotor excitation winding magnetic field do not match or even reverse with the armature rotating winding electromagnetic field magnetic poles, a large inrush current will be generated, which will cause great harm to the motor and power supply system.

Method used

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  • Excitation control method and excitation control device after asynchronous starting of synchronous motor

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Experimental program
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Effect test

Embodiment 1

[0022] Embodiment 1: A measurement and control generator 2 is installed at the non-driving end of the main generator 1 , and the rotor of the measurement and control generator 2 is driven to rotate by the rotor of the main generator 1 .

[0023] When the main generator 1 is started in PTI mode, its control is as follows:

[0024] Disconnect the main generator 1 excitation system, figure 1 Middle relay K is disconnected;

[0025] The main generator 1 armature cable is energized, and the main generator 1 starts asynchronously;

[0026] The armature voltage of the main generator is sent to the synchronous control device 3 through the sampling cable;

[0027] The measurement and control generator 2 is driven by the main generator 1 to generate electricity and sent to the synchronous control device 3 through the sampling cable;

[0028] The synchronous control device 3 compares the voltage phase and frequency of the armature of the main generator 1 with the voltage phase and fre...

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Abstract

The invention provides an excitation control method and an excitation control device after asynchronous starting of a synchronous motor. A measurement and control generator is arranged at a non-driving end of a main generator, and the number of pole pairs and the rated voltage of the measurement and control generator are the same with those of the main generator. After PTI asynchronous starting, the excitation time can be accurately controlled, the impact of excitation can be eliminated, and the system safety and reliability can be improved.

Description

technical field [0001] The invention relates to a control method, in particular to an excitation control method after an asynchronous start of a synchronous motor, and belongs to the field of ship control. Background technique [0002] At present, some ships equipped with twin engines and double propellers, such as rescue ships and sea surveillance ships, have the characteristics of low speed and long time when performing cruising tasks. Under this working condition of the ship, the diesel engine used as the main engine has a small load and low efficiency, which is not conducive to energy saving and emission reduction. In order to reduce energy consumption, under this working condition, the ship can only operate one main engine and drive the generator connected to it to generate electricity (PTO, POWER TAKE OFF) and propeller propulsion, while the generator connected to the main engine on the other side Disengage it to use it as a motor (PTI, POWER TAKE IN) and drive the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/00
Inventor 王双喜
Owner 镇江赛尔尼柯自动化股份有限公司