Inductive wireless power transfer device with improved coupling factor and high voltage isolation

A method of increasing power transfer in an inductive wireless power transfer device, the method comprising:

• separating a primary winding assembly from a secondary winding assembly by a distance;
• arranging a first magnetic core cap on the primary winding assembly and arranging a second magnetic core cap on the secondary winding assembly so as to magnetically couple together the primary winding assembly and the secondary winding assembly;
• and
• interposing a multi-section high-voltage (HV) isolator between the primary winding assembly and the secondary winding assembly so as to increase the coupling between the primary winding assembly and the secondary winding assembly, the multi-section HV isolator including at least one individual insulator section comprising a dielectric material, and at least one intermediate magnetic core comprising a ferrite material interposed between the primary winding assembly and the secondary winding assembly.