Power supply device and power supplying method

Abstract

The invention provides a power supply device and a power supplying method. The power supply device comprises an input charging unit, an input filtering unit, a regulating unit, a transformer, a controller, an output unit, an output capacitor, a switching unit and a feedback unit. The power supply is used for converting external AC power supply to output power supply with appropriate voltage and appropriate output power. The regulating unit comprises a regulating capacitor and a regulator which are connected in series. The regulating unit is used for being connected with the input filtering unit and is controlled by the controller for operating in a working mode which comprises starting open-circuit, starting conduction, short-circuit normal operation and overvoltage open-circuit protection. Therefore the power supply device and the power supplying method can settle a problem of inrush current in starting, and particularly is suitable for a controller which utilizes a digital operation mode. An actual requirement can be satisfied through updating firmware and software programs. Furthermore the power supply device and the power supplying method realize high flexibility.

Description

technical field [0001] The present invention relates to a power supply and a power supply method, in particular, a series-connected adjustment capacitor and a regulator are connected in parallel to the input rectification unit, and the controller controls the regulator so that the rectified voltage generated by the input rectification unit When the voltage is too high, the regulator is an open circuit, so as to close the conduction path from the adjustment capacitor to the ground, prevent the excessive input voltage from damaging the electrical components, and provide a protection function. Background technique [0002] The power supply is a very important device in the electrical industry. It mainly supplies stable power, including appropriate voltage, current, and power, and especially needs to work normally under continuous or sudden changes in input power and load. For example, an instantaneous inrush current (Inrush Current) of tens of amperes or even hundreds of ampere...

AI Technical Summary

Problems solved by technology

[0005] However, the disadvantage of the above-mentioned prior art is that the thermistor itself still has a resistance value, so no matter how small the resistance value of the thermistor is during normal operation, there will still be resistance, so the overall operating efficiency of the power supply cannot be further improved.

In addition, in order to prevent the damage of inrush current, it is necessary to select high-voltage resistant components, which increases the hardware cost and is not conducive to the application in the industry

Images