Single-phase inverter variable frequency power supply based on sinusoidal modulation wave

Abstract

The invention relates to a single-phase inversion frequency conversion power supply based on a sine modulation wave. The single-phase inversion frequency conversion power supply comprises an inversion circuit which is connected with an overtemperature and overcurrent protection circuit, a separation power driving circuit and a soft starting circuit; the soft starting circuit is connected with a soft starting control signal generation circuit and a rectification circuit; the rectification circuit is connected with a 220-volt alternating current input; the separation power driving circuit is connected with a driving signal generation circuit which is connected with the overtemperature and overcurrent protection circuit, a digital / analog (D / A) conversion circuit, a sawtooth carrier wave generation circuit and a dead-zone circuit; the D / A conversion circuit is connected with a data memory and a voltage negation circuit; the data memory is connected with a counter which is connected with the dead-zone circuit, a voltage control oscillator and the data memory; the voltage control oscillator is connected with a voltage regulator; and the voltage regulator is connected with the voltage negation circuit. The single-phase inversion frequency conversion power supply has the advantages of changing the frequency of the power supply according to a load requirement, effectively saving the power supply, reducing the volume of a system and greatly improving the reliability of the system.

Description

technical field [0001] The invention relates to a single-phase inverter variable-frequency power supply based on sinusoidal modulation waves, belonging to the field of power supply control. Background technique [0002] Power electronics technology involves electronics, electricity and control theory. With the rapid development of microprocessors and power devices and the maturity of control theory, the application of power electronics technology is becoming more and more extensive. Various power electronic devices are widely used in HVDC power transmission, static var compensation, AC / DC power drive, inverter power supply, etc. [0003] In the application of the above power electronic devices, the inverter power supply is widely used. Among the various existing power sources, batteries, solar cells, etc. are all DC power sources. When these power sources are required to supply power to AC loads, they need to be inverted. While obtaining stable AC power and sufficient powe...

AI Technical Summary

Problems solved by technology

At present, frequency conversion power supplies with various microprocessors as the control core have appeared. Although they all have high performance, most of these frequency conversion power supplies have high cost and complicated control, so they are not suitable for popularization and use.

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