ARRAY COIL SYSTEM

• US 20160276876A1
• Filed: 06/02/2016
• Published: 09/22/2016
• Est. Priority Date: 12/05/2013
• Status: Active Grant

• Current Assignee: Panasonic Automotive Systems Company of America (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Inventors: MIYASHITA, Norihiro
• Granted Patent: US 9,950,637 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B60L 53/12 Inductive energy transfer
• 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 53/124 Detection or removal of foreign bodies
• CPC Class Codes: H02J 50/005 Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/20 using microwaves or radio frequency waves
• CPC Class Codes: H02J 50/60 responsive to the presence of foreign objects, e.g. detection of living beings
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• 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 90/14 Plug-in electric vehicles

Abstract

An array coil system includes a detector coil having a plurality of coils arranged in an array, and a plurality of resistances. Both terminals of each of the coils of the detector coil are connected to a ground or a DC voltage via associated ones of the resistances.

Claims

1. An array coil system comprising:

a detector coil which includes a plurality of coils arranged in an array; and

a plurality of resistances, wherein

both terminals of each of the coils of the detector coil are connected to a ground or a DC voltage via associated ones of the resistances.

2. The array coil system of claim 1, wherein

a resonant capacitive element which forms part of a resonance circuit is connected between both terminals of an associated one of the coils of the detector coil, and

the resonant capacitive element is arranged near the detector coil and connected to the detector coil.

3. The array coil system of claim 1, further comprising:

a transmission circuit which generates high-frequency power having a predetermined frequency and outputs the power to the detector coil; and

a high-frequency oscillation source which feeds high-frequency power having a predetermined frequency to a power transmitting coil so as to perform non-contact charge, wherein

the frequency of the high-frequency power output by the transmission circuit is set to be different form the frequency of the high-frequency power output by the high-frequency oscillation source, and

a circuit protection filter which is characterized as allowing the frequency of the high-frequency power output by the transmission circuit to pass therethrough and as blocking the frequency of the high-frequency power output by the high-frequency oscillation source is connected to the detector coil.

4. The array coil system of claim 1, wherein

each of the coils of the detector coil is designed to have a smaller dimension than a power transmitting coil.

5. The array coil system of claim 1, further comprising:

a power transmitting coil case which houses the power transmitting coil, wherein the detector coil is arranged above the power transmitting coil and housed in the power transmitting coil case, and

the detector coil is arranged such that a distance from a surface of the power transmitting coil case to the detector coil is shorter than a distance from the power transmitting coil to the detector coil.