DC POWER SUPPLY CIRCUIT
First Claim
1. A direct current (DC) power supply circuit comprising;
- a rectifier circuit rectifying alternating current (AC) supplied thereto from an AC power supply; and
a voltage conversion circuit connected across output terminals of the rectifier circuit, converting a voltage from the rectifier circuit, and outputting a converted voltage to a load,the voltage conversion circuit comprising;
an inductor having terminals, a first one of which is connected, via the load, to a high-potential one of the output terminals of the rectifier circuit;
a switching element connected between a second one of the terminals of the inductor and a low-potential one of the output terminals of the rectifier circuit;
a capacitor having terminals, a first one of which is connected to the low-potential one of the output terminals of the rectifier circuit; and
a first unidirectional element connected between a second one of the terminals of the capacitor and the second one of the terminals of the inductor, whereinwhen an instantaneous value of the voltage from the rectifier circuit is higher than or equal to a voltage across the terminals of the capacitor,in an ON period of the switching element, current flows along a first current path from the high-potential one of the output terminals of the rectifier circuit, through the load, the inductor, and the switching element in the stated order, and into the low-potential one of the output terminals of the rectifier circuit, andin an OFF period of the switching element, current flows along a second current path from the high-potential one of the output terminals of the rectifier circuit, through the load, the inductor, the first unidirectional element, and the capacitor in the stated order, and into the low-potential one of the output terminals of the rectifier circuit.
3 Assignments
0 Petitions
Accused Products
Abstract
In a DC power supply circuit (1), when an instantaneous value (Vin) of a voltage from a rectifier circuit (2) is higher than or equal to a voltage (VC2) across terminals of a capacitor (C2), in an ON period of a switching element (Q1), current flows along a first current path, from a high-potential output terminal of the rectifier, through a load (11), an inductor (L2), and the switching element in the stated order, and into a low-potential output terminal of the rectifier, and in an OFF period of the switching element, current flows along a second current path, from the high-potential output terminal of the rectifier, through the load, the inductor, a diode (D1), and the capacitor in the stated order, and into the low-potential output terminal of the rectifier.
-
Citations
19 Claims
-
1. A direct current (DC) power supply circuit comprising;
-
a rectifier circuit rectifying alternating current (AC) supplied thereto from an AC power supply; and a voltage conversion circuit connected across output terminals of the rectifier circuit, converting a voltage from the rectifier circuit, and outputting a converted voltage to a load, the voltage conversion circuit comprising; an inductor having terminals, a first one of which is connected, via the load, to a high-potential one of the output terminals of the rectifier circuit; a switching element connected between a second one of the terminals of the inductor and a low-potential one of the output terminals of the rectifier circuit; a capacitor having terminals, a first one of which is connected to the low-potential one of the output terminals of the rectifier circuit; and a first unidirectional element connected between a second one of the terminals of the capacitor and the second one of the terminals of the inductor, wherein when an instantaneous value of the voltage from the rectifier circuit is higher than or equal to a voltage across the terminals of the capacitor, in an ON period of the switching element, current flows along a first current path from the high-potential one of the output terminals of the rectifier circuit, through the load, the inductor, and the switching element in the stated order, and into the low-potential one of the output terminals of the rectifier circuit, and in an OFF period of the switching element, current flows along a second current path from the high-potential one of the output terminals of the rectifier circuit, through the load, the inductor, the first unidirectional element, and the capacitor in the stated order, and into the low-potential one of the output terminals of the rectifier circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A direct current (DC) power supply circuit comprising;
-
a rectifier circuit rectifying alternating current (AC) supplied thereto from an AC power supply; and a voltage conversion circuit connected across output terminals of the rectifier circuit, converting a voltage from the rectifier circuit, and outputting a converted voltage to a load, the voltage conversion circuit comprising; an inductor having terminals, a first one of which is connected to a high-potential one of the output terminals of the rectifier circuit; a switching element connected between a second one of the terminals of the inductor and a low-potential one of the output terminals of the rectifier circuit; a capacitor having terminals, a first one of which is connected to the low-potential one of the output terminals of the rectifier circuit and a second one of which is connected to a first terminal of the load; and a first unidirectional element connected between the second one of the terminals of the inductor and a second terminal of the load, wherein when an instantaneous value of the voltage from the rectifier circuit is higher than or equal to a voltage across the terminals of the capacitor, in an ON period of the switching element, current flows along a first current path from the high-potential one of the output terminals of the rectifier circuit, through the inductor and the switching element in the stated order, and into the low-potential one of the output terminals of the rectifier circuit, and in an OFF period of the switching element, current flows along a second current path from the high-potential one of the output terminals of the rectifier circuit, through the inductor, the first unidirectional element, the load, and the capacitor in the stated order, and into the low-potential one of the output terminals of the rectifier circuit. - View Dependent Claims (11, 12, 13)
-
-
14. A direct current (DC) power supply circuit comprising;
-
a rectifier circuit rectifying alternating current (AC) supplied thereto from an AC power supply; and a voltage conversion circuit connected across output terminals of the rectifier circuit, converting a voltage from the rectifier circuit, and outputting a converted voltage to a load, the voltage conversion circuit comprising; an inductor having terminals, a first one of which is connected to a high-potential one of the output terminals of the rectifier circuit and a first terminal of the load; a switching element connected between a second one of the terminals of the inductor and a low-potential one of the output terminals of the rectifier circuit; a capacitor having terminals, a first one of which is connected to the low-potential one of the output terminals of the rectifier circuit; a first unidirectional element connected between a second one of the terminals of the capacitor and the second one of the terminals of the inductor; and a second unidirectional element connection between the second one of the terminals of the inductor and a second terminal of the load, wherein when an instantaneous value of the voltage from the rectifier circuit is higher than or equal to a voltage across the terminals of the capacitor, in an ON period of the switching element, current flows along a first current path from the high-potential one of the output terminals of the rectifier circuit, through the inductor and the switching element in the stated order, and into the low-potential one of the output terminals of the rectifier circuit, and in an OFF period of the switching element, current flows along a second current path from the high-potential one of the output terminals of the rectifier circuit, through the inductor, the first unidirectional element, and the capacitor in the stated order, and into the low-potential one of the output terminals of the rectifier circuit, and along a third current path from the second one of the terminals of the inductor, through the second unidirectional element and the load in the stated order, and into the first one of the terminals of the inductor. - View Dependent Claims (15, 16, 17, 18, 19)
-
Specification