A method of operating a power supply system including inverter stage
AssigneeHitachi Medical Corporation
InventorsHirofumi Hino, Hideki Uemura, Kazuo Kaneko
Life of this patent
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Abstract
A power supply system including a DC-to-AC inverter stage and a voltage step-up transformer is intended to have the output voltage settlement with a minimal delay and suppressed bounce at the start-up of power supply to the load, and also intended to reduce the load voltage bounce caused by the leakage inductance and stray capacitance of a high tension step-up transformer.
Claims5
A method of operating a power supply system having a d.c. power source, an inductive circuit element, a parallel connection of a capacitor and a load, a first switch connected in series with said d.c. power source, and a second switch connected in parallel with a serial connection of said inductive circuit element and said parallel connection of said capacitor and said load, the method including controlling the switching of said first and second switches to supply a voltage from said d.c. power source through said inductive circuit element to said load, the method comprising the steps of:
- closing said first switch so as to apply said voltage to said load;
- opening said first switch when said voltage reaches a predetermined voltage of said d.c. power source;
- closing said second switch at the same time said first switch is opened;
- opening said second switch when a current flowing in said inductive circuit element becomes substantially equal to a predetermined current value;
- and
- closing said first switch at the same time said second switch is opened.
Dependencies are inferred from the claim text.