Chopped-mode energy-saving electromachining pulse power supply

Abstract

The invention discloses a chopped-mode energy-saving electromachining pulse power supply. The chopped-mode energy-saving electromachining pulse power supply comprises a second adjustable direct-current power supply, a first adjustable direct-current power supply, a main control single chip microprocessor, a stabilizing circuit, a first power switch pipe, a second power switch pipe, a first high voltage isolation diode, a second high voltage isolation diode, a pulse conversion and arc starting drive circuit, a pulse conversion and chopping drive circuit and a power supply regulation control circuit. By adopting the chopped-mode energy-saving electromachining pulse power supply, a current limiting resistor with severe energy consumption is canceled, the utilization rate of the pulse power supply can be increased; moreover, the power supply has the properties such as easiness in arching, self-adaptive voltage regulation and adjustability of pulse current parameters, and the pulse voltage, pulse current, pulse width and pulse interval can be independently adjusted.

Description

technical field [0001] The invention relates to a power supply, in particular to a chopper-type energy-saving pulse power supply for electric processing. Background technique [0002] Its performance has a great influence on the production efficiency of EDM, product processing quality and electrode loss, especially has a decisive influence on the utilization rate of electric energy. [0003] The pulse power supply is the main component of the electric processing system, and it has various structural forms. For example, the discharge gap and the DC power supply are independent and mutually isolated independent pulse power supplies, and different types of pulse power supplies such as high and low voltage composite pulse power supplies and multi-circuit pulse power supplies derived from the independent pulse power supplies. [0004] The power utilization rate of the most commonly used series current-limiting resistor EDM pulse power supply is less than 25%, and more than 75% o...

AI Technical Summary

Problems solved by technology

[0004] The power utilization rate of the most commonly used series current-limiting resistor EDM pulse power supply is less than 25%, and more than 75% of the power is consumed in the form of heat on the current-limiting resistor, which not only reduces the utilization rate of power energy, but also affects the pulse power supply. Higher requirements are placed on the performance of the heat dissipation system and electronic components

The pulse power supply of the main circuit inductance current-limiting type needs to be designed, and the inductance element or the inductance in the transformer coil is used to replace the current-limiting resistor for current limiting and energy storage. Although the power utilization rate of the pulse power supply is greatly improved, it limits the pulse power supply. Parameter adjustment range

There is also a PWM voltage-regulating energy-saving pulse power supply for electric machining. Under the high-frequency PWM working mode, it is difficult to realize high-frequency pulse electric machining due to the large switching loss of power switching elements.

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