Abstract:
This disclosure provides systems, methods and apparatus for wireless power transfer and particularly wireless power transfer to remote systems such as electric vehicles. In one aspect, a system comprises substantially co-planar first and second receiver coils. The system further comprises a third receiver coil. The system further comprises a controller configured to determine a current of the co-planar first and second receiver coils, a current of the third receiver coil, and a duty cycle of the wireless power transfer receiver device. The controller is configured to enable the co-planar first and second receiver coils, the third receiver coil, or the co-planar first and second receiver coils and the third receiver coil based on a comparison of the current of the co-planar first and second receiver coils, the current of the third receiver coil, and the duty cycle.
Abstract:
This disclosure provides systems, methods and apparatus for connecting and operating an AC source to a load. In one aspect a power supply topology is provided which may be of particular use in the area of wireless power transfer. The topology allows for a single source to energize one or more conductive structures configured to generate a field, improving power transfer to a power receiver.
Abstract:
This disclosure provides systems, methods and apparatus for wireless power transfer and particularly wireless power transfer to remote systems such as electric vehicles. In one aspect, a system comprises substantially co-planar first and second receiver coils. The system further comprises a third receiver coil. The system further comprises a controller configured to determine a current of the co-planar first and second receiver coils, a current of the third receiver coil, and a duty cycle of the wireless power transfer receiver device. The controller is configured to enable the co-planar first and second receiver coils, the third receiver coil, or the co-planar first and second receiver coils and the third receiver coil based on a comparison of the current of the co-planar first and second receiver coils, the current of the third receiver coil, and the duty cycle.
Abstract:
This disclosure provides systems, methods and apparatus for wireless power transfer. In one aspect an apparatus for wirelessly transferring power from a charging power source to a device is provided. The apparatus includes a first strand wound in one or more turns and operationally coupled to the charging power source and a second strand wound together with the first strand in one or more turns and operationally coupled to the charging power source. The apparatus further includes an inductor circuit connected to the first strand and disconnected from the second strand. The inductor circuit is further configured to reduce a current difference between a first current flowing through the first strand and a second current flowing through the second strand.
Abstract:
An apparatus, a system and a method for wireless power transfer are disclosed. A method of forming a physical core of a wireless power transfer device includes positioning two or more electromagnetically permeable members adjacent to one another and applying longitudinal pressure to an end of the electromagnetically permeable members, the electromagnetically permeable members at least partially encapsulated in retaining compound. A wireless power transfer device includes a casing in which is housed an induction coil, a plurality of electromagnetically permeable members arranged in a line and a retaining compound.