Electric excitation synchronization starting/electric generator initial position detection method of multistage structure

A technology of initial position detection and synchronous starting, which is applied in the direction of motor generator control, control of generators, and control of electromechanical transmissions. The effects of direct detection, simple calculation process, and high accuracy of initial position detection

Active Publication Date: 2017-12-26
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0006] In order to avoid the shortcomings of the prior art, the present invention proposes a multi-stage structure electric excitation synchronous start / generator initial position detection method, which solves the problem that the current rotor initial position detection method is difficult to realize electric excitation synchronous start / generator initial position. The problem of precise location detection

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  • Electric excitation synchronization starting/electric generator initial position detection method of multistage structure
  • Electric excitation synchronization starting/electric generator initial position detection method of multistage structure
  • Electric excitation synchronization starting/electric generator initial position detection method of multistage structure

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Embodiment Construction

[0038] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0039] The concrete steps that embodiment comprises are as follows:

[0040] Step 1: Use a magnetic powder brake to fix the motor rotor, apply an AC excitation voltage with a phase difference of 90° to the two-phase exciter, the voltage amplitude is 90V, and the angular frequency is 200Hz;

[0041] Step 2: Estimate the value of the rotor position angle, as follows:

[0042]2.1) Inject a high-frequency square wave voltage with an amplitude of 20V and an angular frequency of 1.25KHz into the α-axis of the main generator as follows:

[0043]

[0044] Among them, T h = 0.0008s, ω h =2.5πrad / s; The high frequency response signal of the main generator stator is transmitted to the exciter stator through the main generator rotor, rotating rectifier, and exciter rotor in turn, and the effective signal of the rotor position extracted from the exciter stator is obtain...

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Abstract

The invention relates to an electric excitation synchronization starting/electric generator initial position detection method of a multistage structure. An auxiliary signal is successively injected into an alpha phase winding and a beta phase winding of a main electric generator stator. A corresponding response signal is reversely transmitted to an exciter via a rotating rectifier. On an exciter stator side, an initial position of a response current signal is detected. In the method, a characteristic that a mutual inductance between the main electric generator stator windings and an excitation winding is changed along with changes of a rotor position is used so that a problem that the response signal on the rotor can not be directly detected is solved; the method does not depend on a salient effect of a main electric generator; a resolving process is simple; and detection precision of the rotor initial position is high.

Description

technical field [0001] The invention belongs to the technical field of AC motor transmission control, and relates to a multi-stage structure electric excitation synchronous start / generator initial position detection method, which is a method for injecting auxiliary signals into the α-phase winding and β-phase winding of the main generator stator successively Above all, the initial position detection method of detecting the response current signal on the stator side of the exciter belongs to the technical field of AC motor transmission control. Background technique [0002] The integrated system based on electric excitation synchronous starter / generator can save the special starting mechanism and effectively reduce the weight of the aircraft. Electric excitation synchronous starter / generator, as a commonly used generator in the current aircraft AC power system, is favored by researchers of starter / power integration technology due to its mature power generation technology and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/32H02P21/18
Inventor 孟涛刘卫国彭纪昌焦宁飞毛帅
Owner NORTHWESTERN POLYTECHNICAL UNIV
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