Dual-input single-output power supply
First Claim
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1. A dual-input single-output power supply comprising:
- a first input configured for receiving a first alternating current (AC) input voltage from a first AC source;
a second input configured for receiving a second AC input voltage from a second AC source;
a first filtering and protection unit connected to the first input and comprising circuitry for filtering the first AC input voltage and providing protection from the first AC source;
a second filtering and protection unit connected to the second input and comprising circuitry for filtering the second AC input voltage and providing protection from the second AC source;
a switching device connected to the first and second filtering and protection units and configured to selectively output one of the first AC input voltage and the second AC input voltage; and
a rectifying and power conversion unit connected to the switching device for receiving the one of the first AC input voltage and the second AC input voltage, and comprising circuitry for converting the one of the first AC input voltage and the second AC input voltage into a direct current (DC) output voltage for delivery to a load.
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Abstract
There is described a dual-input single-output power supply with shared circuitry for the rectifying and power conversion stages and duplicated circuitry for the filtering and protection stages, and with a switching device to switch between the two inputs. Operation of the switching device is controlled according to the status of the input power feeds.
19 Citations
20 Claims
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1. A dual-input single-output power supply comprising:
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a first input configured for receiving a first alternating current (AC) input voltage from a first AC source; a second input configured for receiving a second AC input voltage from a second AC source; a first filtering and protection unit connected to the first input and comprising circuitry for filtering the first AC input voltage and providing protection from the first AC source; a second filtering and protection unit connected to the second input and comprising circuitry for filtering the second AC input voltage and providing protection from the second AC source; a switching device connected to the first and second filtering and protection units and configured to selectively output one of the first AC input voltage and the second AC input voltage; and a rectifying and power conversion unit connected to the switching device for receiving the one of the first AC input voltage and the second AC input voltage, and comprising circuitry for converting the one of the first AC input voltage and the second AC input voltage into a direct current (DC) output voltage for delivery to a load. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for operating a dual-input single-output power supply, the method comprising:
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monitoring a first status of a first input feed at a first input of the power supply and a second status of a second input feed at a second input of the power supply; determining if at least one of the first status and the second status meets at least one switching condition; and outputting at least one control signal comprising instructions to cause a switching device connected to the first input and the second input to switch between the first input feed and the second input feed when the at least one switching condition is met. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A non-transitory computer readable medium having stored thereon program instructions for operating a dual-input single-output power supply, the program instructions executable by a processor for:
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monitoring a first status of a first input feed at a first input of the power supply and a second status of a second input feed at a second input of the power supply; determining if at least one of the first status and the second status meets at least one switching condition; and outputting at least one control signal comprising instructions to cause a switching device connected to the first input and the second input to switch between the first input feed and the second input feed when the at least one switching condition is met.
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Specification