High-efficiency wide-limit programmable inverter power supply device and control method thereof

Abstract

The invention discloses a high-efficiency wide-limit programmable inverter power supply device and a control method thereof. The device comprises a main loop unit; the input terminal of the main loop unit is connected with commercial power; and the commercial power flows through a filter, a rectifier, and an inverter successively and then the power is transformed into a direct-current signal so as to provide power for a load. The rectifier and the inverter are connected with a programmable control unit. The programmable control unit is configured to preset a voltage effective value, carry out difference processing on the voltage effective value and an effective value fed back by voltage sampling to obtain a voltage error, carry out PI adjustment on the voltage error to generate a voltage amplitude signal with PI adjustment, multiply the voltage amplitude signal with PI adjustment by a sinusoidal wave signal generated by output voltage phase locking of the filter to obtain a sinusoidal modulation voltage signal, subtracting a received voltage instantaneous feedback signal from the sinusoidal modulation voltage signal, carry out PI adjustment, multiplying the adjusted signal with a preset proportionality coefficient to obtain an SPWM voltage pulse width signal. The SPWM voltage pulse width signal is used for driving a switching tube in the rectifier to generate a voltage waveform with a preset amplitude and frequency.

Description

technical field [0001] The invention belongs to the field of power supplies, and in particular relates to a high-efficiency and wide-ranging programmable inverter power supply device and a control method thereof. Background technique [0002] Special industries such as exploration or measurement in outdoor remote areas, such as precision equipment for mobile base station operations, have high requirements for power supply voltage amplitude, frequency, and waveform distortion. Long, resulting in low terminal power supply voltage, poor power quality, and power supply quality cannot be guaranteed. When the backup generator is used for power supply, the power supply frequency is unstable, which affects the use of precision equipment. Due to the high impedance of the line, the equivalent impedance of the line reaches 4-6 ohms. When the starting current is large when the equipment is started, the voltage drop of the line will increase, and the voltage drop at the end of the line w...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the deficiencies of the prior art, the present invention provides a high-efficiency and wide-ranging programmable inverter power supply device, which is suitable for special industries such as exploration or measurement in remote areas, such as precision equipment for mobile base station operations and other power supply quality For equipment with high requirements, for problems such as high line impedance and failure to start, provide electrical equipment with programmable amplitude and frequency sine waveforms to meet the use of various harsh environments

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