High power factor boost rectifier apparatus
First Claim
1. High power factor boost rectifier apparatus for providing a dc voltage output from one of a plurality of ac power sources, each of said sources providing one of a plurality of possible voltage levels, comprising:
- input circuit means including input terminal means for connecting said boost rectifier apparatus to an ac power source, switching means for configuring said apparatus to the voltage level provided by said ac power source, and rectifier means for supplying rectified ac voltage across first and second rectifier terminals;
an output circuit including first and second intermediate terminals comprising;
semiconductor switch means connected across said first and second intermediate terminals;
first and second diodes;
capacitor means connected in series with said first and second diodes, said first diode connected to said first intermediate terminal and said second diode connected to said second intermediate terminal, thereby placing said semiconductor switch means in parallel with the series-connected first and second diodes and capacitor means;
a first output terminal connected to the junction of said first diode and said capacitor means;
a second output terminal connected to the junction of said second diode and said capacitor means;
said semiconductor switch means includes first and second transistors connected in series;
said capacitor means includes first and second capacitors connected in series; and
a connection from the junction of said first and second transistors to the junction of said first and second capacitors;
a first connection from the first rectifier terminal to the first intermediate terminal; and
a second connection from the second rectifier terminal to the second intermediate terminal;
whereby a dc output voltage is developed across said first and second output terminals and said output voltage is divided between said first and second transistors, between said first and second diodes, and between said first and second capacitors.
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Accused Products
Abstract
A power supply for providing a single level dc output voltage, with input power factor correction, from a wide range of ac input voltages commonly available worldwide. The power supply rectifier circuit can be configured as a full wave bridge for high line voltage inputs and as a voltage doubler for low voltage inputs. Output voltage regulation and power factor correction are accomplished by a high frequency boost circuit having two inductors connected in parallel for the low input voltage configuration and in series for the high input voltage configuration. The high frequency switching semiconductor components are connected in a series circuit which limits their voltage requirement to one-half the output voltage.
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Citations
17 Claims
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1. High power factor boost rectifier apparatus for providing a dc voltage output from one of a plurality of ac power sources, each of said sources providing one of a plurality of possible voltage levels, comprising:
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input circuit means including input terminal means for connecting said boost rectifier apparatus to an ac power source, switching means for configuring said apparatus to the voltage level provided by said ac power source, and rectifier means for supplying rectified ac voltage across first and second rectifier terminals; an output circuit including first and second intermediate terminals comprising; semiconductor switch means connected across said first and second intermediate terminals; first and second diodes; capacitor means connected in series with said first and second diodes, said first diode connected to said first intermediate terminal and said second diode connected to said second intermediate terminal, thereby placing said semiconductor switch means in parallel with the series-connected first and second diodes and capacitor means; a first output terminal connected to the junction of said first diode and said capacitor means; a second output terminal connected to the junction of said second diode and said capacitor means; said semiconductor switch means includes first and second transistors connected in series; said capacitor means includes first and second capacitors connected in series; and a connection from the junction of said first and second transistors to the junction of said first and second capacitors; a first connection from the first rectifier terminal to the first intermediate terminal; and a second connection from the second rectifier terminal to the second intermediate terminal; whereby a dc output voltage is developed across said first and second output terminals and said output voltage is divided between said first and second transistors, between said first and second diodes, and between said first and second capacitors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification