US 2008/0290808 A1Published application

Power supply apparatus for arc-generating load

AssigneeSansha Electric Manufacturing Company, Limited

InventorsKenzo Danjo, Takashi Tsujii, Hiroki Morimoto

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Abstract

An output of a rectifying circuit (6), which rectifies commercial AC power, is supplied to an inverter (12) through a power factor correction circuit (8). The output of the inverter (12) is voltage-transformed in a transformer (16), rectified in a rectifying circuit (18) and is applied to a xenon lamp (2). A secondary winding (22s) of a transformer (22) of an igniter (20) is connected between the rectifying circuit (18) and the xenon lamp (2) in order to generate an arc in the xenon lamp (2). A pulse generator provides a pulse for a short time period to a primary winding (22p) of the transformer (22). An auxiliary power supply (26) supplies arc-sustaining current prepared based on the commercial AC power to the junction of the rectifying circuit (18) and the secondary winding (22s) of the transformer (22).

Claims4

Dependent claims

A power supply apparatus for an arc-generating load, comprising:

an input-side rectifier adapted for connection to an AC power supply;
a high-frequency converter for converting an output of said input-side rectifier to a high-frequency signal;
a transformer having a primary winding receiving the high-frequency signal from said high-frequency converter and having a secondary winding in which a voltage-transformed version of said high-frequency signal is developed;
an output-side rectifier for rectifying the voltage-transformed high-frequency signal from the secondary winding of said transformer for application to said arc-generating load;
an igniter including an ignition transformer, said ignition transformer having a secondary winding having one end connected to said output-side rectifier and having the other end adapted for connection to said arc-generating load and having a primary winding in which a pulse is supplied for a short time period from a pulse generator;
a controller for controlling at least said high-frequency converter;
and
an auxiliary power supply for driving said controller;
said auxiliary power supply including an auxiliary power supply transformer, said auxiliary power supply transformer being provided with an arc-sustaining secondary winding for providing arc-sustaining current, the arc-sustaining current being supplied from said arc-sustaining secondary winding to a junction of said output-side rectifier and said secondary winding of said ignition transformer.

6 more elements

Dependencies are inferred from the claim text.