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High Voltage Constant Current Inverter Power Supply

IP.com Disclosure Number: IPCOM000075267D
Original Publication Date: 1971-Aug-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 36K

Publishing Venue

IBM

Related People

Bacon, JL: AUTHOR [+2]

Abstract

This high-voltage constant-current inverter power supply utilizes a sensing circuit to sense the output current which, in turn, provides a signal to a low-voltage series regulator circuit to control the input voltage of a high-voltage transistor inverter.

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High Voltage Constant Current Inverter Power Supply

This high-voltage constant-current inverter power supply utilizes a sensing circuit to sense the output current which, in turn, provides a signal to a low- voltage series regulator circuit to control the input voltage of a high-voltage transistor inverter.

A standard transistor power inverter circuit 11 provides a high-voltage output signal to output circuit 13. The output voltage of the inverter 11 may be at different levels, depending on the output circuit 13 utilized. For example, if a 9 Kv DC signal is required, the output signal of inverter 11 must be rectified if the signal is a 9 Kv peak wave, multiplied by a capacitive doubler if it is a 4.5 Kv peak wave, etc.

A constant current is maintained through load 15 by use of a current-sensing feedback circuit 17. The current flowing through current-sensing circuit 17 is converted to a voltage, which is compared with a reference voltage by a differential amplifier located in comparator unit 19. If the sensed voltage is greater than the reference voltage, a feedback signal is provided to low-voltage series-pass regulator 21 decreasing the output voltage of that unit. As the input voltage to inverter 11 is decreased, the output of the inverter transformer also decreases and the lower output voltage results in a lower load voltage. The lower load voltage is unable to drive as much current through the load impedance, and the load current is thus lowered. At this poi...