Power supply system
First Claim
1. A power supply system comprising:
- a controllable converter suitable for connection to an input supply and being adapted to generate an output supply;
a plurality of loads each making a demand for power from the converter;
a plurality of load controllers each interposed between the said output supply and a load; and
a supply controller which can communicate with all of said load controllers and control the generation of the output supply, said supply controller receiving requests from each load controller in response to a demand by a respective load, authorizing the demand as a limit of power to be drawn by that load, and if the actual power drawn by that load as sensed by the respective load controller is greater than the said limit momentarily disconnecting the output supply to all the loads.
1 Assignment
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Accused Products
Abstract
A power supply system (10) comprises a multi-phase AC supply (12) which is provided to an AC-DC convertor 14. The DC output from the convertor (14) sources power to a DC bus (16), which then provides power to a secondary supply bus (42) and electrical loads (38, 40). The convertor (14) is connected to the DC bus (16) by a master controller (22), which is controllable by master control processor (30) to disconnect the two. In a similar way, the secondary supply bus (44), load (38) and load (40) are connected to the DC bus (16) by slave controllers (46), which are each controllable to effect disconnection through action of the respective slave control processors (48). When any of the secondary supply bus (44) or loads (38, 40) demand power from convertor (14), a demand request is passed by the respective slave control processor (48) to the master control processor (30) via data bus ( 32). The master control processor (30) then determines whether the demand request is legal based on a maximum permissible power request and will also consider the instant cumulative sum of power required to be provided. If the request is legal, a demand authorization is returned to the slave control processor (48), and the power can be drawn. If the request is not legal, the master control processor (30) can require one or all slave control processors (48) to power down the electrical load through operation of contactors (24) in the respective slave controllers (46). Alternatively, the slave control processor (48) making the demand request can be caused to effect the regeneration of power. In the instance of serious faults, the master control processor (30) can cause the DC bus (16) to be powered down by effecting operation of contactors (24) within the master controller (22).
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Citations
10 Claims
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1. A power supply system comprising:
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a controllable converter suitable for connection to an input supply and being adapted to generate an output supply; a plurality of loads each making a demand for power from the converter; a plurality of load controllers each interposed between the said output supply and a load; and a supply controller which can communicate with all of said load controllers and control the generation of the output supply, said supply controller receiving requests from each load controller in response to a demand by a respective load, authorizing the demand as a limit of power to be drawn by that load, and if the actual power drawn by that load as sensed by the respective load controller is greater than the said limit momentarily disconnecting the output supply to all the loads. - View Dependent Claims (2, 3, 4, 5)
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6. A method of controlling a power supply system having a controllable converter connected to an input supply and providing an output supply, a plurality of loads connected to the output supply by respective load controllers, and a supply controller in communication with the load controllers and having control of the generation of the output supply, the method comprising the steps of:
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(a) requesting of the supply controller a demand for power from a one of said loads by its respective load controller; (b) authorizing by the supply controller the demand as a limit of power to be drawn by that load; (c) determining by the supply controller whether the actual power drawn by the requesting load is greater than the limit for that load; and
if so,(d) causing momentary disconnection by the supply controller of the output supply to all loads. - View Dependent Claims (7, 8, 9, 10)
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Specification