AC-DC CONVERTER AND COMPRESSOR DRIVING APPARATUS AND AIR CONDITIONING APPARATUS USING THE SAME
First Claim
1. An AC-DC converter comprising:
- a rectifier connected to an AC power supply via a reactor;
a plurality of capacitors connected in series across output terminals of the rectifier;
a first bidirectional switch having one end connected to one input terminal of the rectifier and another end connected to a connecting point between a plurality of capacitors;
a second bidirectional switch having one end connected to the other input terminal of the rectifier and another end connected to the other end of the first bidirectional switch; and
control means for actuating the first and second bidirectional switches during a half cycle of the AC power supply so as to control a voltage input to the rectifier to obtain a desired value of an output voltage.
1 Assignment
0 Petitions
Accused Products
Abstract
An AC-DC converter is provided which suppresses a harmonic current and improves power factor at low cost. Such an AC-DC converter includes a rectifier connected to an AC power supply via a reactor, capacitors connected in series across the output terminals of the rectifier, a first bidirectional switch having one end connected to one input terminal of the rectifier and the other end connected to a connecting point of capacitors, a second bidirectional switch having one end connected to the other input terminal of the rectifier and the other end connected to the other end of the first bidirectional switch, and a control circuit for actuating the first and second bidirectional switches during a half cycle of the AC power supply so as to control a voltage inputted to the rectifier to a desired output voltage.
-
Citations
29 Claims
-
1. An AC-DC converter comprising:
-
a rectifier connected to an AC power supply via a reactor; a plurality of capacitors connected in series across output terminals of the rectifier; a first bidirectional switch having one end connected to one input terminal of the rectifier and another end connected to a connecting point between a plurality of capacitors; a second bidirectional switch having one end connected to the other input terminal of the rectifier and another end connected to the other end of the first bidirectional switch; and control means for actuating the first and second bidirectional switches during a half cycle of the AC power supply so as to control a voltage input to the rectifier to obtain a desired value of an output voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
-
Specification