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AssigneeSchneider Toshiba Inverter Europe SAS
InventorsMichel ARPILLIERE, Philippe Baudesson, Hocine Boulharts, Philippe Loizelet
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The present invention relates to a device for controlling a JFET power electronic switch (15) of the normally ON type, the control device comprising a main gate control circuit (30) powered by a main power source (11) for driving the gate of the JFET switch. The control device comprises a protection switching device (41,51) that is switchable between two states, an auxiliary circuit (40,50) for controlling the switching device, and an auxiliary power source (25) whose positive terminal is connected to the source of the JFET switch and whose negative terminal is connected to the gate of the JFET switch, bypassing said gate control circuit (30) in one of the two positions of the switching device. The switching device is an electromagnetic or electronic switch.
Device for controlling a JFET power electronic switch (15) of the normally ON type, the control device comprising a main gate control circuit (30) powered by a main power source (11) for driving the gate (G) of the JFET switch (15), characterized in that the control device comprises:
Speed controller comprising an inverter stage (0) having several JFET power electronic switches (15a, 15b) of the normally ON type for supplying a variable voltage to an electrical load (M), such as an electric motor, characterized in that the controller comprises a control device according to one of the preceding claims for each of the said power electronic switches.
Dependencies are inferred from the claim text.