Effective value voltage regulating circuit for aviation high-power variable-frequency alternating-current power generation system

Abstract

The invention provides an effective value voltage regulating circuit for an aviation high-power variable-frequency alternating-current power generation system. The effective value voltage regulating circuit comprises a conditioning conversion circuit, an effective value calculation circuit, a voltage calibration circuit, a PID regulating circuit, a reference voltage circuit, a reference comparisoncircuit, a CPLD processing circuit, a high-phase limiting circuit, a permanent magnet machine rectifying circuit and a shaping amplification and power tube circuit. Based on an effective value voltage regulation technology, the duty ratio uniformity of an exciting current PWM control signal is improved by designing a reference comparison circuit and matching and optimizing parameters, so that theoutput voltage fluctuation of the variable-frequency alternating-current generator is reduced; the problem of voltage modulation of a variable-frequency alternating-current generator in a high-rotating-speed working interval due to the fact that a nonlinear load is connected into an airplane power grid is effectively solved, performance indexes of a power generation system are optimized, and power load input power supply quality is improved.

Description

technical field [0001] The invention belongs to the technical field of aviation electrical design, and relates to an effective value voltage regulating circuit used in an aviation high-power frequency conversion AC power generation system. Background technique [0002] With the development of more electric aircraft, nonlinear loads such as aviation high-power variable-frequency AC power generation systems and power electronics are gradually and widely used, which causes the problem of output voltage modulation of variable-frequency alternators. The effective value can truly reflect the effect of the nonlinear load on the output voltage of the variable frequency alternator, make up for the deficiency of the traditional average voltage regulation method, accurately extract the output voltage of the variable frequency alternator and feed it back to the controller for adjustment, and can solve the problem of low speed working conditions The problem of output voltage modulation o...

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Problems solved by technology

[0003]Aiming at the voltage modulation problem caused by the connection of nonlinear loads to high-power variable frequency AC power generation systems, the traditional mean voltage regulation and effective value voltage regulation methods are slightly insufficient and difficult to meet Requirements of relevant standards for the characteristic indicators of frequency conversion AC power generation system

[0004] The present invention aims at the working condition of the aviation high-power frequency conversion AC power generation system with nonlinear load in the high-speed working range, based on the effective value voltage regulation technology, an improved Effective value voltage regulation circuit, and then solve the voltage modulation problem of high-power variable-frequency AC power generation system in the high-speed working range with nonlinear load conditions, and realize the optimization of system characteristic indicators

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