Multi-stage structure electric excitation synchronous start/generator initial position detection method

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

Active Publication Date: 2019-09-24
NORTHWESTERN POLYTECHNICAL UNIV
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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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  • Multi-stage structure electric excitation synchronous start/generator initial position detection method
  • Multi-stage structure electric excitation synchronous start/generator initial position detection method
  • Multi-stage structure electric excitation synchronous start/generator initial position detection method

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Embodiment Construction

[0038] The present invention will now be further described in conjunction with the embodiments and drawings:

[0039] The specific steps included in the embodiment are as follows:

[0040] Step 1: Use a magnetic powder brake to fix the motor rotor, and 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 rotor position angle value, 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] Where 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. The effective rotor position signal extracted from the exciter stator is obtained after relevant processing The cosine ...

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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 starter / generator initial position detection method, which is a method of injecting auxiliary signals into the main generator stator α-phase winding and β-phase winding successively Above, 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 the electric excitation synchronous starter / generator can save the special starting mechanism and effectively reduce the weight of the aircraft. Electrically excited synchronous starter / generators are currently commonly used generators in aircraft AC power systems. Due to their mature power generation technology and high reliability, they are favored by researchers in the integration of sta...

Claims

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Application Information

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Patent Type & Authority Patents(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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