Patent ID: 8830638
Filing Date: 2014-09-09
Classification: H02M,H03K

Abstract:
1. A switching apparatus for dynamically switching in or out a inductor coil from a circuit having at least two mutually coupled inductor coils (L 1 , L 2 ), driven by a modulated drive circuit(s) having a dead time between the switching cycles, the apparatus comprising: at least one latching circuit having two bipolar transistors (Q one or more control circuits connected to the latch circuit for operating the bipolar transistors so as to keep the latching circuit on or off; such that control circuits provide a constant steady forward bias to keep the latch circuit on and a constant steady reverse bias to keep the latch circuit off, the bias being changed only when the inductors coils (L such that to turn on the latching circuit a forward bias voltage is applied during the dead time of the switching cycles and to turn off the latching circuit a reverse bias voltage is applied during the dead time of the switching cycles; a plurality of diodes (D