High-voltage power source apparatus

A high-voltage power source apparatus comprising:

• step-up means including a transformer for controlling an input at a primary side of said transformer and generating a high-voltage output at a secondary side of said transformer;
• rectifying means for rectifying the high-voltage output at the secondary side of said transformer;
• and
• control means for changing an output from said rectifying means at a predetermined frequency by means of controlling the primary side of said transformer,
• wherein said control means has a circuit for performing constant current control or constant voltage control for obtaining a constant load current or voltage, respectively, of the high-voltage output at the secondary side of said transformer, and said constant current or voltage control circuit has an error amplifier for comparing said constant load current or voltage of the high-voltage output with a reference value and a circuit for superposing an AC component of a predetermined waveform on an output from said error amplifier, whereby said control means controls an output magnitude at the secondary side of said transformer in accordance with an output of said constant current or voltage control circuit.

A high-voltage power source apparatus comprising:

• step-up means including a transformer for controlling an input at a primary side of said transformer and generating a high-voltage output at a secondary side of said transformer;
• rectifying means for rectifying the high-voltage output at the secondary side of said transformer;
• and
• control means for changing an output from said rectifying means at a predetermined frequency by means of controlling the primary side of said transformer,
• wherein said control means controls an output magnitude at the secondary side by controlling power at the primary side of said transformer, and said control means has means for controlling said primary side of said transformer by comparing a load current or voltage with a reference value, and means for changing the reference value in accordance with a predetermined frequency.

A high-voltage power source apparatus comprising:

• first step-up means having a first transformer for controlling an input at a primary side of said first transformer and generating a positive high voltage output at a secondary side of said first transformer;
• second step-up means having a second transformer for controlling an input at a primary side of said second transformer and generating a negative high-voltage output at a secondary side of said second transformer, said first and second step-up means being series-connected;
• and
• control means for changing the output magnitudes of the positive and negative high-voltage outputs of said first and second step-up means at a predetermined frequency and with a predetermined phase shift.