A high-efficiency and wide-ranging programmable inverter power supply device and its control method

Abstract

The invention discloses a high-efficiency and wide-range programmable inverter power supply device and a control method thereof. Among them, the device includes a main circuit unit, the input end of which is connected to the mains, and the mains is converted into a DC signal by a filter, a rectifier and an inverter in turn to supply power to the load; the rectifier and the inverter are respectively connected to the programmable control unit; The programmable control unit is configured to preset the effective value of the voltage, and make a difference between it and the effective value of the voltage sampling feedback to obtain the voltage error; adjust the voltage error through PI to generate a PI adjusted voltage amplitude signal; adjust the PI voltage The amplitude signal is multiplied by the sine wave signal generated by the phase-locked output voltage of the filter to obtain a sine modulation voltage signal; the sine modulation voltage signal is subtracted from the received voltage instantaneous feedback signal, and then adjusted by PI and pre-set Multiply the proportional coefficients to obtain the SPWM voltage pulse width signal; the SPWM voltage pulse width signal is used to drive the switching tube in the rectifier, and finally 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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