Patent ID: 11955892
Assignee: HALLIBURTON ENERGY SERVICES, INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 9:
10. A method comprising:
providing a high voltage source for powering a load positionable downhole in a wellbore;
controlling supply of a drive voltage from a drive voltage source to a coupled inductor of a circuit by switching a first transistor of the circuit using a control voltage source, the drive voltage source and the control voltage source each having a voltage that is lower than a voltage of the high voltage source;
generating, by a rectifying diode of the circuit, a rectified voltage from a voltage output of the coupled inductor;
sending the rectified voltage to a gate of a second transistor of the circuit and to a capacitor of the circuit to generate a filtered voltage, the second transistor configured to operate at a higher voltage than the first transistor; and
using a voltage differential between the rectified voltage and the filtered voltage to provide a switching voltage between the gate and a source or an emitter of the second transistor, the switching voltage having a higher voltage than the voltage of the high voltage source; and
coupling the high voltage source to the load by switching the second transistor using the switching voltage.