Three-level type starting/electricity generator two-phase excitation constant slip AC starting model and control method thereof

A generator, three-stage technology, applied in the control model and control field of three-stage starter/generator two-phase excitation constant slip AC start, can solve the specific implementation difficulties of the two-phase AC excitation method, without specifying the excitation current Control characteristics, complex AC and DC excitation switching methods, etc., to achieve reliable starting, high utilization rate, and high excitation efficiency

Active Publication Date: 2014-07-30
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
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Problems solved by technology

[0004] In order to solve the excitation problem of the three-stage generator/generator, relevant scholars at home and abroad have proposed single-phase AC excitation and three-phase AC excitation schemes. The single-phase AC excitation is limited by the capacity of the exciter body and the amplitude of the power supply voltage. Not high, poor energy transmission between stator and rotor
For three-phase AC excitation, the structural design of the motor body needs to be greatly changed, the utilization rate

Method used

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  • Three-level type starting/electricity generator two-phase excitation constant slip AC starting model and control method thereof
  • Three-level type starting/electricity generator two-phase excitation constant slip AC starting model and control method thereof
  • Three-level type starting/electricity generator two-phase excitation constant slip AC starting model and control method thereof

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Embodiment Construction

[0035] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0036] The invention proposes a three-stage generator / generator two-phase excitation constant-slip AC starting control method, which can ensure that the excitation current of the main generator remains stable during the starting process of the three-stage generator / generator.

[0037] The establishment process of the three-stage starter / generator two-phase excitation constant slip AC starting control model is as follows:

[0038] Step 1: Attach figure 1 The two-phase alternating current of the given exciter in is:

[0039] U α = U m cos ω 1 t ...

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Abstract

The invention relates to a three-level type starting/electricity generator two-phase excitation constant slip AC starting control model and a control method thereof. According to the technical scheme, a two-phase symmetric exciting winding is used in a three-level type starting/electricity generator exciter stator, when a motor is started, two-phase alternating currents with phase mutual difference being 90 degrees are connected to the magnetizing exciter stator, the additional alternating current frequency of the magnetizing exciter stator is adjusted to keep the constant slip with the induction magnetic potential frequency of a motor rotor, so that it is guaranteed that the amplitude of three-phase alternating currents output by a magnetizing exciter is stable, and sufficient stable exciting currents are provided for starting of a main electricity generator. Accordingly, sufficient stable exciting currents are provided for starting of the main electricity generator, and it can be guaranteed that a three-level type starting/power generation machine is stably and reliably started.

Description

technical field [0001] The invention belongs to the technical field of three-stage generator / generator AC start control, and in particular relates to a control model and control method for three-stage generator / generator two-phase excitation constant-slip AC start. Background technique [0002] At present, three-stage brushless generators are widely used in the fields of aviation AC power systems, electric vehicles and wind power generation systems. This type of motor is used as a generator with mature technology, but this type of motor has no self-starting capability and requires a special starter motor to It starts, which complicates its starting. If the original three-stage brushless generator can be improved and controlled to make it work in the electric state, that is, to realize the integration of starting and power generation, the corresponding starting supporting equipment can be saved, thereby reducing the volume and weight of the system. [0003] The three-stage g...

Claims

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Application Information

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IPC IPC(8): H02P9/14
Inventor 骆光照刘文昉张莎刘卫国
Owner NORTHWESTERN POLYTECHNICAL UNIV
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