Charging device and method using dual-mode magnetic coupling for an automobile vehicle
First Claim
1. A device (10) for charging a mobile terminal by magnetic coupling, said device (10) comprising:
- a first charging module (11) designed to form a charging signal at a first charging frequency (F1),a primary coil (13) composed of a set of turns,a ferromagnetic body (14), the ferromagnetic body optimized for an operation at the first charging frequency F1,a second charging module (12) designed to form a charging signal at a second charging frequency (F2), the second charging frequency (F2) being higher than the first charging frequency (F1),first routing selector circuit (150) means designed to connect/disconnect the primary coil (13) to/from the first charging module (11) and to/from the second charging module (12),selector circuit (16) means for adjusting the number of turns (NT, N2) of the primary coil (13) designed to activate/disable a de-activatable sub-set of turns (N1) of the primary coil (13) depending on whether i) said primary coil (13) is connected to the first charging module (11) or ii) said primary coil (13) is connected to the second charging module (12), the number of turns on the primary coil (13) being chosen to be adapted for an operation in association with the first charging module (11) and being divided into two complementary sub-sets of turns;
i) a first sub-set comprising (N1) turns that are de-activatable,ii) a second sub-set comprising (N2) turns, being chosen to be adapted for an operation in association with the second charging module (12), andpassive resonator circuits (19) means for saturating the ferromagnetic body (14), the passive resonator circuits (19) means comprising passive resonator circuits (19) with a resonance frequency close to the second charging frequency (F2) and arranged, with respect to the ferromagnetic body (14), on an opposite side from the primary coil (13), and designed to reduce, within said ferromagnetic body (14), the magnetic field formed by the primary coil (13) when said primary coil (13) is connected to the second charging module (12).
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Accused Products
Abstract
A device (10) for charging a mobile terminal by magnetic coupling, includes a first charging module (11) designed to form a charging signal at a first charging frequency, a primary coil (13) composed of a set of turns, a ferromagnetic body (14), a second charging module (12) designed to form a charging signal at a second charging frequency, higher than the first charging frequency. Furthermore, the charging device includes first routing elements (150) designed to connect/disconnect the primary coil (13) to/from the first charging module (11) and to/from the second charging module (12), elements (16) for adjusting the number of turns on the primary coil (13) and elements (19) for saturating the ferromagnetic body (14) at the second charging frequency. A charging method is also described.
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Citations
16 Claims
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1. A device (10) for charging a mobile terminal by magnetic coupling, said device (10) comprising:
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a first charging module (11) designed to form a charging signal at a first charging frequency (F1), a primary coil (13) composed of a set of turns, a ferromagnetic body (14), the ferromagnetic body optimized for an operation at the first charging frequency F1, a second charging module (12) designed to form a charging signal at a second charging frequency (F2), the second charging frequency (F2) being higher than the first charging frequency (F1), first routing selector circuit (150) means designed to connect/disconnect the primary coil (13) to/from the first charging module (11) and to/from the second charging module (12), selector circuit (16) means for adjusting the number of turns (NT, N2) of the primary coil (13) designed to activate/disable a de-activatable sub-set of turns (N1) of the primary coil (13) depending on whether i) said primary coil (13) is connected to the first charging module (11) or ii) said primary coil (13) is connected to the second charging module (12), the number of turns on the primary coil (13) being chosen to be adapted for an operation in association with the first charging module (11) and being divided into two complementary sub-sets of turns; i) a first sub-set comprising (N1) turns that are de-activatable, ii) a second sub-set comprising (N2) turns, being chosen to be adapted for an operation in association with the second charging module (12), and passive resonator circuits (19) means for saturating the ferromagnetic body (14), the passive resonator circuits (19) means comprising passive resonator circuits (19) with a resonance frequency close to the second charging frequency (F2) and arranged, with respect to the ferromagnetic body (14), on an opposite side from the primary coil (13), and designed to reduce, within said ferromagnetic body (14), the magnetic field formed by the primary coil (13) when said primary coil (13) is connected to the second charging module (12). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification