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Thread: Switching 1500Vdc/10A

  1. #1
    New Member New Member DaveCat is on a distinguished road
    Join Date
    Feb 2020

    Switching 1500Vdc/10A

    We work in the photovoltaic industry and need to test 24 module strings, operating at 1500Vdc./10A. In order to perform the tests, we have a 1500Vdc 15kW power supply, run from a generator, that will be connected to one string at a time and would need to switch between strings remotely (wireless).

    The 24 channels would need to be switch LIVE, as wee will not be able switch the power supply on and off remotely.

    Would it be possible to source SSR's/Mosfet's/IGBT's that would be able to switch the voltage and current required?

    Assistance with specifying the components required, circuit and PCB board design would be greatly appreciated.


  2. #2

    Infineon Employee
    Infineon Employee
    electricuwe is on a distinguished road
    Join Date
    Sep 2019
    This application bears three main challenges, two technical ones and one on the commercial side.

    - You always need a freewheeling path when turning off current. This can be a diode, another switch or some kind of overvoltage protection
    - This power range is usually covered by Discretes, however discrete devices for voltages above 1700 V are rarely available, regardless if based on Si or SiC

    Discrete devices for this voltage range are technically feasible, but if the market is only for test equipment and other niches rarely attractive for a semiconductor supplier Hence find someone willing to supply this as a subsystem, SSR or similar. Customized module solutions (e.g. in Easy1B) for such applications would only become feasible only at volumes of several 1000 parts per year.

    The views expressed here are my personal opinions, have not been reviewed or authorized by Infineon and do not necessarily represent the views of Infineon.

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