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DRIVER FOR SWITCHING ELEMENT AND CONTROL SYSTEM FOR ROTARY MACHINE USING THE SAME

  • US 20130181640A1
  • Filed: 01/10/2013
  • Published: 07/18/2013
  • Est. Priority Date: 01/12/2012
  • Status: Active Grant
First Claim
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1. A driver for selectively performing a charging task and a discharging task for an on-off control terminal of a voltage-controlled switch having a conductive path, according to a drive signal directing selectively an on state and an off state of the voltage-controlled switch, thus setting the voltage-controlled switch to one of the on state and the off state, the driver comprising:

  • a discharging-rate changing module adapted to change a rate of discharging the on-off control terminal of the voltage-controlled switch at least between a first value and a second value lower than the first value;

    a measuring module configured to measure a value of a parameter as a function of a current flowing through the conductive path of the voltage-controlled switch during the drive signal being in the on state; and

    a discharging control module configured to;

    control the discharging-rate changing module, as a function of the value of the parameter, to select one of the first value and the second value as the rate of discharging the on-off control terminal of the voltage-controlled switch upon the drive signal directing a change from the on state of the voltage-controlled switch to the off state thereof; and

    discharge the on-off control terminal of the voltage-controlled switch using the selected one of the first value and the second value as the rate of discharging the on-off control terminal of the voltage-controlled switch.

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