Power conversion apparatus for pulse current
AssigneeNational Cheng Kung University
InventorRay-Lee Lin
Life of this patent
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Abstract
The present invention discloses a power conversion apparatus for pulse current suitable for electrical discharge machining. The power conversion apparatus comprises a linear power conversion circuit and a switching power conversion circuit. The linear power conversion circuit offers a fast response to changes in output load and is used to adjust the output voltage. The magnitude or the waveform of the current through the workpiece is adjusted by the power resistor or the power transistor. Then, the switching power conversion circuit supplies the workpiece a stable power to make the power conversion apparatus output a stable pulse current to achieve the goal of high power conversion efficiency, high power density, and small size.
Claims14
A power conversion apparatus for pulse current, comprising:
- a linear power conversion circuit, electrically connected to an outer power supply, the linear power conversion circuit supplying a load current and strengthening the dynamic response ability to the sudden change in the load current;
- and
- a switching power conversion circuit, electrically connected to the outer power supply, the switching power conversion circuit strengthening the load current by a phase-shifting technique to make the load current have better dynamic response ability during the sudden change in the load current.
A power conversion apparatus for pulse current, comprising:
- a linear power conversion circuit, electrically connected to an outer power supply, the linear power conversion circuit supplying a load current and strengthening the dynamic response ability to the sudden change in the load current;
- a switching power conversion circuit, electrically connected to the outer power supply, the switching power conversion circuit strengthening the load current by a phase-shifting technique to make the load current have better dynamic response ability during the sudden change of the load current;
- and
- a switching DC/AC converter, used for supplying input power, the switching DC/AC converter converting the AC power supplied by the outer power supply into DC power.
A power conversion apparatus for pulse current, comprising:
- a synchronous-rectifying buck converter with four phases, electrically connected to an outer power supply, the synchronous-rectifying buck converter with four phases modulating the output voltage;
- a buck converter with four phases, electrically connected to a discharging electrode, the buck converter with four phases modulating the output voltage;
- a plurality of diodes, electrically connected between the synchronous-rectifying buck converter with four phases and the buck converter with four phases, the diodes feeding back the extra inductor voltage;
- and
- a linear power converter, electrically connected to the discharging electrode, the linear power converter supplying the power to a load.
Dependencies are inferred from the claim text.