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

Claim 0:
1. An electrical charging device comprising:
a power supply configured to configure a direct current (DC) power based on power control signals and including:
a voltage regulator, and
a power supply controller configured to:
receive the power control signals, generate voltage regulation instructions for altering a DC voltage of the DC power, based on the power control signals,
provide the voltage regulation instructions to the voltage regulator to control the DC voltage of the DC power, wherein the voltage regulation instructions include 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, and

a power transmitter for wireless power transfer, the power transmitter including
a control and communications unit configured to:
provide the power control signals to the power supply for controlling a power level of an alternating current (AC) power signal configured for transmission to a power receiver, the power supply being external of the power transmitter, the AC power signal having an initial root mean square voltage, the power supply, 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 DC power from the power supply external to the power transmitter and convert the DC power to the AC power signal based on the pulse width modulation signal, and
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,

wherein the step level is a change in voltage at which the voltage regulator is configured to step up or step down the DC voltage of the DC power for configuring the initial root mean square voltage of the AC power signal.