Apparatus for checking for a presence of an electrically conductive body, and charging system
First Claim
1. A charging arrangement for inductively charging an electric vehicle, comprising:
- an apparatus for checking for a presence of an electrically conductive body, the apparatus including;
a plurality of transmitting devices, at least one transmitting device of said plurality for generating a transmission signal in the form of a magnetic field;
a plurality of receiving devices, at least one receiving device of said plurality for generating a reception signal from the transmission signal induced into said receiving device;
wherein said plurality of transmitting devices are an odd number of transmitting devices and said plurality of receiving devices are an odd number of receiving devices a control device configured to sequentially drive said transmitting devices for respectively providing the transmission signal;
said transmitting devices arranged relative to said receiving devices with a main extension direction perpendicular to a main extension direction of said receiving devices;
said transmitting device and said receiving device configured such that, when the electrically conductive body is present, a first reception signal is formed in said reception device on account of the induced transmission signal and, when the electrically conductive body is absent, a second reception signal is formed that is different from the first reception signal; and
said transmitting device includes a predetermined number of transmitting coils arranged alongside one another in a main extension direction of said transmitting device and said receiving device has a plurality of receiving coils and a crossover point between two receiving coils arranged alongside one another, and said receiving device is arranged with respect to said transmitting device to center said crossover point within one of said transmitting coils.
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Accused Products
Abstract
An apparatus for checking for a presence of an electrically conductive body has at least one transmitting device and at least one receiving device. The transmitting device provides a transmission signal in the form of a magnetic field. The receiving device generates a reception signal from the transmission signal that is induced into the receiving device. The transmitting and receiving devices are configured in such a way that, when the electrically conductive body is absent, partial reception signals form in the receiving device on account of the induced transmission signal and the partial reception signals substantially cancel one another out in the reception signal.
14 Citations
8 Claims
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1. A charging arrangement for inductively charging an electric vehicle, comprising:
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an apparatus for checking for a presence of an electrically conductive body, the apparatus including; a plurality of transmitting devices, at least one transmitting device of said plurality for generating a transmission signal in the form of a magnetic field; a plurality of receiving devices, at least one receiving device of said plurality for generating a reception signal from the transmission signal induced into said receiving device; wherein said plurality of transmitting devices are an odd number of transmitting devices and said plurality of receiving devices are an odd number of receiving devices a control device configured to sequentially drive said transmitting devices for respectively providing the transmission signal; said transmitting devices arranged relative to said receiving devices with a main extension direction perpendicular to a main extension direction of said receiving devices; said transmitting device and said receiving device configured such that, when the electrically conductive body is present, a first reception signal is formed in said reception device on account of the induced transmission signal and, when the electrically conductive body is absent, a second reception signal is formed that is different from the first reception signal; and said transmitting device includes a predetermined number of transmitting coils arranged alongside one another in a main extension direction of said transmitting device and said receiving device has a plurality of receiving coils and a crossover point between two receiving coils arranged alongside one another, and said receiving device is arranged with respect to said transmitting device to center said crossover point within one of said transmitting coils. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification