Patent ID: 9576725
Date: 2017-02-21
CPC Classifications: H01F,H02M,H03K

Claim:
1. A transformer comprising: a primary winding comprising at least one first wiring wrapped a plurality of times around a first toroid; a secondary winding comprising at least one second wiring wrapped a plurality of times around a second toroid; a coupling winding extending through the first toroid of the primary winding and through the second toroid of the secondary winding, wherein the coupling winding forms at least one closed loop; an additional secondary winding placed between the primary winding and the secondary winding; and a shield terminal electrically coupled to the coupling winding, wherein the shield terminal is configured to direct a current in the coupling winding to ground wherein the transformer provides isolation between a gate drive circuitry and a gate drive power circuitry of a transistor of a converter.