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US 12,051,966 B2Granted
Converter and on-board charger
AssigneeHuawei Digital Power Technologies Co., Ltd.
InventorsChen Chen, Bin Ma, Weiping Liu, Zhaoxue Cui
Life of this patent
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Abstract
A converter for avoiding a short-circuit fault of the converter while inhibiting a surge impact includes: a power factor correction (PFC) circuit, a surge protection circuit, and a switch circuit. The PFC circuit is configured to: convert a first component of a first alternating current received by an alternating current terminal of the PFC circuit into a first direct current, and output the first direct current through a direct current terminal of the PFC circuit; and convert a second direct current received by the direct current terminal of the PFC circuit into a second alternating current, and output the second alternating current through the alternating current terminal of the PFC circuit.
Claims15
A converter, comprising:
- a power factor correction (PFC) circuit comprising two direct current terminals and two or more alternating current terminals;
- a surge protection circuit comprising three unidirectional converters or two bridge arms, wherein each of the three unidirectional converters or each of the two bridge arms comprises two diodes, wherein an anode of a first diode of each of the three unidirectional converters or each of the two bridge arms is connected to a respective alternating current terminal of the surge protection circuit, and wherein a cathode of a second diode of each of the three unidirectional converters or each of the two bridge arms is connected to a respective alternating current terminal of the surge protection circuit;
- a switch circuit comprising a first unidirectional switch and a second unidirectional switch, wherein a first end of the first unidirectional switch is connected to a cathode of the first diode of each of the three unidirectional converters or each of the two bridge arms, wherein a first end of the second unidirectional switch is connected to an anode of the second diode of each of the three unidirectional converters or each of the two bridge arms, and wherein a second end of the first unidirectional switch and a second end of the second unidirectional switch are connected to the two direct current terminals of the PFC circuit;
- and
- a controller configured to:
- turn on both the first and second unidirectional switches to control the PFC circuit to perform AC/DC conversion by receiving alternating current from the two or more alternating current terminals of the PFC circuit and outputting direct current from the two direct current terminals of the PFC circuit;
- and
- turn off both the first and second unidirectional switches to control the PFC circuit to perform DC/AC conversion by receiving direct current from the two direct current terminals of the PFC circuit and outputting alternating current from the two or more alternating current terminals of the PFC circuit.
5 more elements
An on-board charger, comprising:
- a direct current-to-direct current (DC/DC) converter circuit;
- and
- a converter, wherein the converter comprises:
- a power factor correction (PFC) circuit comprising two direct current terminals and two or more alternating current terminals;
- a surge protection circuit comprising three unidirectional converters or two bridge arms, wherein each of the three unidirectional converters or each of the two bridge arms comprises two diodes, wherein an anode of a first diode of each of the three unidirectional converters or each of the two bridge arms is connected to a respective alternating current terminal of the surge protection circuit, and wherein a cathode of a second diode of each of the three unidirectional converters or each of the two bridge arms is connected to a respective alternating current terminal of the surge protection circuit;
- a switch circuit comprising a first unidirectional switch and a second unidirectional switch, wherein a first end of the first unidirectional switch is connected to a cathode of the first diode of each of the three unidirectional converters or each of the two bridge arms, wherein a first end of the second unidirectional switch is connected to an anode of the second diode of each of the three unidirectional converters or the two bridge arms, and wherein a second end of the first unidirectional switch and a second end of the second unidirectional switch are connected to the two direct current terminals of the PFC circuit;
- and
- a controller configured to:
- turn on both the first and second unidirectional switches to control the PFC circuit to perform AC/DC conversion by receiving alternating current from the two or more alternating current terminals of the PFC circuit and outputting direct current from the two direct current terminals of the PFC circuit;
- and turn off both the first and second unidirectional switches to control the PFC circuit to perform DC/AC conversion by receiving direct current from the two direct current terminals of the PFC circuit and outputting alternating current from the two or more alternating current terminals of the PFC circuit;
- wherein the DC/DC converter circuit is connected to the converter, and the DC/DC converter circuit is configured to:
- convert a first direct current output by the converter into a third direct current, and output the third direct current to a charged device;
- and
- convert a fourth direct current output by the charged device into a second direct current, and transmit the second direct current to the converter.
11 more elements
An on-board charger configured to convert a three-phase alternating current into a charging voltage to charge a power battery in a vehicle and supply electric energy stored in the power battery to a power consumption device, comprising:
- a power factor correction (PFC) circuit comprising two direct current terminals and three alternating current terminals;
- a surge protection circuit comprising three bridge arms, wherein each of the three bridge arms comprises two diodes, wherein an anode of a first diode and a cathode of a second diode of each of the three bridge arms is connected to an alternating current terminal of the surge protection circuit;
- a switch circuit comprising a first unidirectional switch and a second unidirectional switch, wherein a first end of the first unidirectional switch is connected to a cathode of the first diode of each of the three bridge arms, wherein a first end of the second unidirectional switch is connected to an anode of the second diode of each of the three bridge arms, and wherein a second end of the first unidirectional switch and a second end of the second unidirectional switch are respectively connected to the two direct current terminals;
- a direct current-to-direct current (DC/DC) converter circuit, configured to:
- convert a direct current output by the PFC circuit into the charging voltage to charge the power battery, wherein both the first and second unidirectional switches are turned on when the PFC circuit converts the three-phase alternating current received from the three alternating current terminals and outputs the direct current from the two direct current terminals to the DC/DC converter;
- and
- adjust the voltage value of a direct current output by the power battery and send the direct current to the PFC circuit, wherein both the first and second unidirectional switches are turned off when the PFC circuit converts the direct current received from the two direct current terminals into an alternating current available to the power consumption device.
4 more elements
Dependencies are inferred from the claim text.