MAGNETIC FIELD DETECTION APPARATUS FOR A WIRELESS POWER TRANSFER SYSTEM

• US 20140339923A1
• Filed: 05/16/2013
• Published: 11/20/2014
• Est. Priority Date: 05/16/2013
• Status: Active Grant

• Current Assignee: Aptiv Technologies AG
• Original Assignee: Delphi Technologies, Inc. (BorgWarner Incorporated)
• Inventors: SIMOPOULOS, GEORGE N., ELY, JEFFREY A.
• Granted Patent: US 9,369,001 B2
• Time in Patent Office: Days
• US Class Current: 307/149
• CPC Class Codes: B60L 2210/30 AC to DC converters
• CPC Class Codes: B60L 53/122 Circuits or methods for driving the primary coil, e.g. supplying electric power to the coil
• CPC Class Codes: B60L 53/30 Constructional details of charging stations
• CPC Class Codes: B60L 53/305 Communication interfaces
• CPC Class Codes: B60L 58/21 having the same nominal voltage
• CPC Class Codes: H02J 2310/48 for electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 10/72 Electric energy management in electromobility
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles
• CPC Class Codes: Y02T 90/16 Information or communication technologies improving the operation of electric vehicles

Abstract

A wireless power receiver configured to control an electrical connection between a capture resonator of a wireless power transfer system and an electrical load, such as a battery pack or electric motor. The circuitry of the wireless power receiver is powered directly by the power output from the capture resonator, automatically powering up the wireless power receiver as soon as the capture resonator begins producing power. The wireless power receiver 16 does not require stand-by power provided by an external source, such as a vehicle battery. Since the wireless power receiver does not require power from an external source, it can initiate charging of a vehicle battery even if the state of charge of the battery in the vehicle is too low to operate the controller.

Claims

1. A wireless power receiver configured to receive an alternating magnetic field produced by a wireless power transmitter, said wireless power receiver comprising:

a capture resonator configured to produce an alternating electrical current when excited by the alternating magnetic field;

a rectifier circuit electrically coupled to said capture resonator and configured to produce a direct electrical current when excited by said alternating electrical current;

a controller configured to control the wireless power receiver;

a voltage regulator circuit electrically coupled to the capture resonator and the controller, wherein the controller is configured to receive electrical power from the voltage regulator circuit when the capture resonator is receiving the alternating magnetic field, thereby activating the controller.

2. The wireless power receiver according to claim 1, further comprising a first transceiver configured to communicate with a second transceiver of said wireless power transmitter, wherein the controller is in communication with said first transceiver.

3. The wireless power receiver according to claim 2, further comprising a memory device in communication with said controller containing instructions that, when executed, cause the wireless power receiver to establish a first communication link between the wireless power receiver and the wireless power transmitter via the first transceiver.