High-voltage protection circuit, high-voltage protection method and power supply
First Claim
1. A high-voltage protection circuit, comprising a primary relay, a secondary relay, a first resistor, a second resistor, a first capacitor, and a second capacitor, whereinone end of the primary relay is connected to an input port of a live line, the other end of the primary relay is connected to an output port of the live line;
- one end of the secondary relay is connected to the input port of the live line, the other end of the secondary relay is connected between the first resistor and the second resistor;
one end of the first capacitor is connected to the output port of the live line, the other end of the first capacitor is connected to a neutral line connected in parallel with the live line;
the second capacitor is connected in parallel with the primary relay; and
the second resistor and the first resistor are connected in series between the input port of the live line and the output port of the live line.
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Accused Products
Abstract
Disclosed are a high-voltage protection circuit, a high-voltage protection method and a power supply. The high voltage protection circuit comprises a main relay, an auxiliary relay, a first resistor, a second resistor, a first capacitor and a second capacitor, wherein one end of the main relay is connected to the input port of a live line, and the other end thereof is connected to the output port of the live line; one end of the auxiliary relay is connected to the input port of the live line, and the other end thereof is connected between the first resistor and the second resistor; one end of the first capacitor is connected to the output port of the live line, and the other end thereof is connected to a neutral line parallel to the live line; the second capacitor is connected to both ends of the main relay in parallel; and the second resistor and the first resistor are connected between the input port and the output port of the live line in series in sequence. The present invention can effectively solve the problem that quick recovery cannot be achieved in an energy-saving mode, so that the system achieves high efficiency and energy saving, and can ensure high-voltage protection in an energy-saving mode through the bridge connection of the second capacitor to both ends of the main relay, and the adjustment of the capacitance values of the first capacitor and the second capacitor.
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Citations
11 Claims
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1. A high-voltage protection circuit, comprising a primary relay, a secondary relay, a first resistor, a second resistor, a first capacitor, and a second capacitor, wherein
one end of the primary relay is connected to an input port of a live line, the other end of the primary relay is connected to an output port of the live line; - one end of the secondary relay is connected to the input port of the live line, the other end of the secondary relay is connected between the first resistor and the second resistor;
one end of the first capacitor is connected to the output port of the live line, the other end of the first capacitor is connected to a neutral line connected in parallel with the live line;
the second capacitor is connected in parallel with the primary relay; andthe second resistor and the first resistor are connected in series between the input port of the live line and the output port of the live line. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- one end of the secondary relay is connected to the input port of the live line, the other end of the secondary relay is connected between the first resistor and the second resistor;
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8. A high-voltage protection method in using a power supply, the power supply comprising a high-voltage protection circuit, a rectifier circuit, an electrolytic capacitor, a Direct Current (DC-DC) conversion circuit, a secondary power supply, an electrolytic capacitor voltage detecting circuit, a secondary relay controlling circuit, a primary relay controlling circuit, and an Alternating Current (AC) input voltage detecting circuit;
- the high-voltage protection circuit comprising a primary relay, a secondary relay, a first resistor, a second resistor, a first capacitor, and a second capacitor;
the method comprising;closing and opening the primary relay and the secondary relay in the high-voltage protection circuit according to an AC input voltage detecting signal output by the AC input voltage detecting circuit and an electrolytic capacitor voltage detecting signal output by the electrolytic capacitor voltage detecting circuit; and performing high-voltage protection on the power supply and performing energy saving control on one or more rectifiers in the power supply by opening and/or closing the primary relay and the secondary relay, wherein one end of the primary relay is connected to an input port of a live line, the other end of the primary relay is connected to an output port of the live line;
one end of the secondary relay is connected to the input port of the live line, the other end of the secondary relay is connected between the first resistor and the second resistor;one end of the first capacitor is connected to the output port of the live line, the other end of the first capacitor is connected to a neutral line connected in parallel with the live line;
the second capacitor is connected in parallel with the primary relay; and
the second resistor and the first resistor are connected in series between the input port of the live line and the output port of the live line, the high-voltage protection circuit is configured for performing high-voltage protection on the power supply;the output end of the high-voltage protection circuit is connected to an input end of the rectifier circuit, the electrolytic capacitor is connected between an output end of the rectifier circuit and an input end of the DC-DC conversion circuit; an output end of the secondary power supply is connected to a relay in the high-voltage protection circuit, the AC input voltage detecting circuit, the primary relay controlling circuit, the secondary relay controlling circuit, and the electrolytic capacitor voltage detecting circuit. - View Dependent Claims (9, 10, 11)
- the high-voltage protection circuit comprising a primary relay, a secondary relay, a first resistor, a second resistor, a first capacitor, and a second capacitor;
Specification