Systems and methods for calibration of a wireless power transmitter

A wireless power transmitter comprising:

• a wireless power transmit coil;
• and
• a controller configured to receive an alignment signal indicative of an alignment of the transmit coil with a receive coil of a wireless power receiver, the transmit coil configured to generate a wireless field based on a driving signal, and when the alignment signal indicates that the transmit coil is substantially aligned with the receive coil, the controller is further configured to:
• receive a signal indicative of a characteristic of an electrical signal received by the wireless power receiver;
• and
• generate a feedback signal to adjust the driving signal based on the received signal.

A method of calibrating a wireless field comprising:

• receiving power via a wireless field with a receive coil, the wireless field being generated by a transmit coil of a wireless power transmitter based on a driving signal;
• receiving an alignment signal indicative of an alignment of the receive coil with the transmit coil, and when the alignment signal indicates that the transmit coil is substantially aligned with the receive coil, the method further comprising:
• determining a characteristic of an electrical signal received by the wireless power receiver;
• and
• generating a feedback signal to adjust the driving signal based on the determined characteristic.

A method for calibrating a wireless field comprising:

• generating a wireless field using a transmit coil based on a driving signal to transmit power to a wireless power receive coil of a wireless power receiver;
• receiving an alignment signal indicative of an alignment between the transmit coil and the receive coil, and when the alignment signal indicates that the transmit coil is substantially aligned with the receive coil, the method further comprising:
• receiving a signal indicative of a characteristic of an electrical signal received by the wireless power receiver;
• and
• generating a feedback signal to adjust the driving signal based on the received signal.

An apparatus for calibrating a wireless field comprising:

• means receiving power via a wireless field, the wireless field being generated by a transmit coil of a wireless power transmitter based on a driving signal;
• means for receiving an alignment signal indicative of an alignment of the means for receiving power with the transmit coil, and when the alignment signal indicates that the transmit coil is substantially aligned with the means for receiving power, the apparatus further comprising:
• means for determining a characteristic of an electrical signal received by the wireless power receiver;
• and
• means for generating a feedback signal to adjust the driving signal based on the determined characteristic.

An apparatus for calibrating a wireless field comprising:

• means for generating a wireless field based on a driving signal to transmit power to a wireless power receive coil of a wireless power receiver;
• means for receiving an alignment signal indicative of an alignment between the means for generating the wireless field and the receive coil, and when the alignment signal indicates that the means for generating the wireless field is substantially aligned with the receive coil, the apparatus further comprising:
• means for receiving a signal indicative of a characteristic of an electrical signal received by the wireless power receiver;
• and
• means for generating a feedback signal to adjust the driving signal based on the received signal.