Patent ID: 11888337
Assignee: PHILIPS I.P. VENTURES B.V.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 18:
19. A method of designing an inductive power transfer system with power accounting comprising:
providing a primary side with a tank circuit;
providing a secondary side,
wherein the secondary side comprises a secondary coil and a load,
wherein the secondary coil is arranged to receive contactless energy from the primary side;

changing the distance between the primary side and the secondary side;
changing the load;
for a plurality of distances between the primary side and the secondary side and for a plurality of loads, measuring at least one primary circuit parameter on the primary side in the tank circuit during the transfer of contactless energy;
for a plurality of distances between the primary side and the secondary device and for a plurality of loads of the secondary side, measuring at least one secondary circuit parameter on the secondary side during the transfer of contactless energy;
selecting a formula to describe power consumption in the system during the transfer of contactless energy based on a plurality of coefficients, the at least one primary circuit parameter, and the at least one secondary circuit parameter;
determining the coefficients using the at least one secondary circuit parameter and the at least one primary circuit parameter; and
storing the coefficient in the inductive power transfer system for use in predicting whether unaccounted for losses during operation are present.