A constant pulse width output inverter control circuit and its operation mode

Abstract

The invention discloses an inverter control circuit with constant pulse width output and its operating mode, which are used to realize the unipolar operation of the inverter. The inverter control circuit is composed of eight parts: a sampling module, an inverter, a microprocessor dsPIC, a reference voltage generating module, a summing and integrating module, a comparing and exclusive OR module, a monostable trigger and a driving circuit. Under the control of the circuit, the output pulse width of the inverter is constant, which is equal to the transient state maintenance time of the monostable trigger. The time of each cycle is controlled by the reference voltage, the sum and integral module and the comparison XOR module, and the output voltage is equal to the reference voltage in one cycle. The control circuit has the advantages of good input voltage adjustment, strong robustness, strong ability to suppress load changes, and simple control. It does not require an accurate mathematical model. The magnitude and frequency of the inverter output voltage are continuously adjustable, and the output sinusoidal voltage High precision.

Description

technical field [0001] The invention relates to an inverter control circuit, in particular to a constant pulse width output inverter unipolar control circuit and its operating mode. Background technique [0002] The inverter has a wide range of applications. It is widely used in electronic products, photovoltaic power generation, military products, ship and vehicle power supply, etc., in supercomputers, large electronic measurement and control equipment, large strong magnetic equipment, high voltage and high current experiments. Platforms, civil aviation and military aviation systems, military high-power electromagnetic equipment and weapons are also widely used. [0003] At present, there are various control methods for inverters. The most common is the PWM modulation method, specifically including SPWM technology and SVPWM technology. Repeated control can improve the steady-state performance of the system, enhance the ability of the system to suppress load disturbances, ...

AI Technical Summary

Problems solved by technology

Deadbeat control has fast dynamic response speed, small output waveform distortion and good waveform quality, but requires high precision of inverter mathematical model and poor system robustness

Other control methods include neural network control, fuzzy control, sliding mode variable structure control, etc., which are rarely used in inverter control due to their high requirements on the accuracy of mathematical models or controllers.

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