DEVICE FOR INDUCTIVELY TRANSMITTING ENERGY AND METHOD FOR OPERATING A DEVICE FOR INDUCTIVELY TRANSMITTING ENERGY
First Claim
1. A device for inductive energy transmission, the device comprising:
- a secondary coil arrangement that is designed to provide an alternating electric voltage between two terminal points when an alternating magnetic field is coupled in;
a rectifier that is designed to rectify the alternating voltage provided by the secondary coil arrangement; and
a switching arrangement that is designed to connect the two terminal points of the secondary coil arrangement together electrically.
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Accused Products
Abstract
The invention relates to inductive energy transmission from a primary coil (12) to a secondary coil (22) having an additional operating state. By means of this two-sided regulation, a primary-side and secondary-side control of the power electronics is performed in accordance with a predetermined operational strategy. Thus, even in the case of unfavorable coupling factors, for example, the efficiency of the inductive energy transmission can be increased, the magnetic field in the air gap between the primary coil (12) and the secondary coil (22) can be minimized, and the inductive energy transmission can be optimized. This optimized operational strategy is enabled by means of a newly introduced idle state, which permits periodic short-circuiting of the secondary side by means of switches on the secondary side (S5, S6) of the inductive energy transmission system. The invention is preferably used in the charging of the battery of an electric vehicle (4), but other applications are also possible.
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Citations
10 Claims
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1. A device for inductive energy transmission, the device comprising:
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a secondary coil arrangement that is designed to provide an alternating electric voltage between two terminal points when an alternating magnetic field is coupled in; a rectifier that is designed to rectify the alternating voltage provided by the secondary coil arrangement; and a switching arrangement that is designed to connect the two terminal points of the secondary coil arrangement together electrically. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for operating a device for inductive energy transmission, the method comprising:
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providing an alternating voltage between two terminal points of a secondary coil arrangement; electrically connecting the two terminal points of the secondary coil arrangement, wherein two terminal points of the secondary coil arrangement are connected together for a predetermined time interval during each half-wave of the provided alternating voltage.
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Specification