Common mode current feed fault protection

    公开(公告)号:US12123905B2

    公开(公告)日:2024-10-22

    申请号:US17836225

    申请日:2022-06-09

    摘要: A system includes a generator. Three AC feeders are connected for feeding AC output from the generator. A rectifier is electrically connected to the three AC feeders and to a load via a first DC feeder and a second DC feeder. A first resistor connects between a the first DC feeder and ground. A second resistor connects between the second DC feeder and ground. At least one of a first current sensor is operatively connected to detect current in the first DC feeder and/or a second current sensor is operatively connected to detect current in the second DC feeder. A controller is configured to monitor for changes in common mode current based on the input from the at least one current sensor, and to determine presence of a fault if change in the common mode current exceeds a predetermined threshold.

    Systems and methods for peak power control

    公开(公告)号:US12093101B2

    公开(公告)日:2024-09-17

    申请号:US17682917

    申请日:2022-02-28

    IPC分类号: G06F1/28 G02B27/01 G05F1/66

    CPC分类号: G06F1/28 G02B27/017 G05F1/66

    摘要: Systems and methods for peak power control include control circuitry which identifies a condition for a device. The control circuitry can apply the condition for the device to one or more models maintained for a plurality of device processing units of the device to determine one or more performance characteristics for the plurality of processing units. The control circuitry can distribute power credits to the plurality of device processing units of the device according to the determined performance characteristics for the plurality of device processing units, to manage a respective peak power for each respective device processing unit according to a number of the power credits distributed to the respective device processing unit.

    Power control device and power control method

    公开(公告)号:US12004271B2

    公开(公告)日:2024-06-04

    申请号:US17416564

    申请日:2019-06-28

    摘要: Provided is a power control device 100 comprising: a current detector 31 that measures a combined current value obtained by combining currents flowing through a plurality of loads 1-4; and an output calculation unit 11 that calculates a correction value obtained by dividing a total value of products of operation output values for the loads 1-4 and rated current values of the loads 1-4, respectively, by the combined current value obtained by the current detector 31, and that performs power supply control for the loads 1-4 on the basis of a corrected operation output value that is a product of the operation output value and the correction value for each of the loads 1-4, in which in a system that heats or cools a workpiece by means of a plurality of loads, heating control or cooling control can be performed in which an effect of a fluctuation in load characteristics is reduced.