Patent ID: 11876387
Assignee: NUCURRENT, INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 17:
18. A system for wireless power transmission comprising:
a power supply that is external to a base station; and
a base station including:
an interface surface;
a control and communications unit configured to:
provide power control signals for controlling a power level of an alternating current (AC) power signal configured for transmission to a power receiver, the AC power signal having an initial root mean square voltage, and
generate a pulse width modulation signal for configuring an AC frequency for the AC power signal, at an operating frequency, the pulse width modulation signal modified by a duty cycle alteration, the duty cycle alteration configured to decrease the initial root mean square voltage of the AC power signal to a shifted root mean square voltage, the shifted root mean square voltage being less than the initial root mean square voltage,

an inverter circuit configured to receive a direct current (DC) power from the power supply external to the base station and convert the DC power to the AC power signal based on the pulse width modulation signal,
a coil configured to transmit the AC power signal to the power receiver, the coil formed of wound Litz wire and including at least one layer, the coil defining, at least, a top face, and
a shielding comprising a ferrite core and defining a cavity, the cavity configured such that the ferrite core substantially surrounds all but the top face of the coil,

wherein the power supply external to the base station is configured to configure the DC power based on the power control signals, the power supply including:
a voltage regulator, and
a power supply controller configured to:
receive the power control signals,
generate voltage regulation instructions for altering the DC power, based on the power control signals, the voltage regulation instructions including voltage step up instructions or voltage step down instructions for the voltage regulator, the voltage step up instructions and voltage step down instructions having a step level, the step level being a change in voltage at which the voltage regulator is configured to step up or step down a DC voltage of the DC power, and
provide the voltage regulation instructions to the voltage regulator to control a DC voltage of the DC power.