Excitation Control Method of Aeronautical Three-Stage Start-up Generator System in Start-up Stage

A technology for start-up generation and start-up phase, which is applied in the direction of motor generator/starter, AC motor control, control system, etc., and can solve the problems of inconstant excitation magnetic field of main generator and increased complexity of optimal start control of main generator, etc. , to achieve the effects of constant size, constant relative speed, and reduced complexity

Active Publication Date: 2017-05-24
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0004] During the on-load starting process of the three-stage brushless synchronous starting / generating system, the excitation current of the main generator changes with the speed, which will cause the excitation magnetic field of the main generator to be unstable, which undoubtedly increases the complexity of the optimal starting control of the main generator

Method used

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  • Excitation Control Method of Aeronautical Three-Stage Start-up Generator System in Start-up Stage
  • Excitation Control Method of Aeronautical Three-Stage Start-up Generator System in Start-up Stage
  • Excitation Control Method of Aeronautical Three-Stage Start-up Generator System in Start-up Stage

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Embodiment Construction

[0031] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0032] The principle block diagram of the inventive method is as figure 2As shown, the current vector amplitude of the two-phase current of the exciter is obtained through sampling, calculation, and filtering, and the current vector amplitude of the modulation voltage is obtained through PI control after taking the difference from the current reference value; by comparing the current speed with the intermediate speed, Select different phase angle calculation formulas to obtain the modulation voltage vector phase angle. The modulated voltage vector drives the two-phase inverter to supply power to the two-phase exciter through a PWM modulation method. In this embodiment, the two-phase inverter adopts a double full-bridge two-phase inverter (such as image 3 shown), the voltage modulation method adopts SVPWM, and the rotational speed sensor adopts a resolver.

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Abstract

The invention relates to an exciter whole-process two-phase alternating-current excitation control method for the starting stage of an aviation tertiary brushless starting power generation system based on a two-phase exciter. In the motor starting process, an exciter adopts two-phase alternating-current excitation in the whole process. The amplitude of a modulation voltage vector is determined through exciter excitation current closed-loop control, and the phase angle of the modulation voltage vector is determined through motor speed reference. When the method of the invention is applied to the starting stage of a tertiary brushless synchronous starting power generation system, the size of the excitation magnetic field of the exciter can be kept constant, and the speed of a rotor armature winding relative to the excitation magnetic field can be kept constant. Finally, the excitation current of a main generator can be kept constant in the whole motor starting process, and the complexity of main generator variable-frequency starting control is reduced.

Description

technical field [0001] The invention belongs to the technical field of aviation AC motors, and specifically relates to a two-phase exciter-based exciter excitation control method in the start-up phase of an aviation three-stage brushless synchronous start / generation system, which is a two-phase AC excitation throughout the start-up phase, Moreover, the excitation control method that the excitation current of the main generator is kept constant during the starting process is realized through the excitation current closed-loop control and the speed reference modulation. Background technique [0002] At present, most aircraft AC power systems in my country use three-stage brushless synchronous motors as generators, and the engines are started by independent special starters. Such an engine-power supply system includes two sets of motors, which increases the volume and weight of the system and reduces reliability. If the integration of motor starting and power generation can be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P1/26
CPCH02P9/08H02P25/22
Inventor 焦宁飞刘卫国孟涛骆光照毛帅
Owner NORTHWESTERN POLYTECHNICAL UNIV
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