CONTROLLED CONTACTLESS POWER TRANSMISSION
First Claim
1. Inductive coupled power transmission circuit having a rotating transformer, comprisingan AC voltage supply for feeding an AC voltage via a series capacitor into the primary winding of said rotating transformer and a load being coupled to the secondary winding of said rotating transformer, wherein said AC voltage supply comprisesa line rectifier for receiving AC voltage from a power line and generating a DC voltage;
- a DC/DC converter for converting the DC voltage from the line rectifier into a controlled intermediate DC voltage;
an AC generator for generating said AC voltage from said intermediate DC voltage;
a matching transformer being connected to said AC generator and said primary winding of the rotating transformer for matching impedance and voltage levels;
a measuring circuit for measuring voltages and/or currents within the AC voltage supply; and
a function generator for estimating voltage and/or current values at the load based on the measured values and for controlling the DC/DC converter and/or the AC generator based on the estimated voltage and/or current values to keep the load current or voltage constant.
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Accused Products
Abstract
An inductive coupled power transmission circuit has a rotating transformer, including an AC voltage supply for feeding an AC voltage via a series capacitor into the primary winding of said rotating transformer and a load being coupled to the secondary winding of said rotating transformer. The AC voltage supply includes a line rectifier for receiving AC voltage from a power line and generating a DC voltage. This is fed into a DC/DC converter for converting the DC voltage from the line rectifier into a controlled intermediate DC voltage. An AC generator generates an AC voltage from the intermediate DC voltage and feeds this via a matching transformer into the primary winding of the rotating transformer. A measuring circuit measures voltages and/or currents within the AC voltage supply and a function generator estimates voltage and/or current values at the load based on the measured values and controls the DC/DC converter and/or the AC generator based on the estimated values.
36 Citations
9 Claims
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1. Inductive coupled power transmission circuit having a rotating transformer, comprising
an AC voltage supply for feeding an AC voltage via a series capacitor into the primary winding of said rotating transformer and a load being coupled to the secondary winding of said rotating transformer, wherein said AC voltage supply comprises a line rectifier for receiving AC voltage from a power line and generating a DC voltage; -
a DC/DC converter for converting the DC voltage from the line rectifier into a controlled intermediate DC voltage; an AC generator for generating said AC voltage from said intermediate DC voltage; a matching transformer being connected to said AC generator and said primary winding of the rotating transformer for matching impedance and voltage levels; a measuring circuit for measuring voltages and/or currents within the AC voltage supply; and a function generator for estimating voltage and/or current values at the load based on the measured values and for controlling the DC/DC converter and/or the AC generator based on the estimated voltage and/or current values to keep the load current or voltage constant. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for transmitting data via a rotating data transmission device, comprising:
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converting voltage from a power line to a controlled intermediate DC voltage, converting this intermediate DC voltage into an AC voltage and transferring that AC voltage via a rotating transformer.
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Specification