POWER TRANSFER SYSTEM
First Claim
1. A power transfer system for transferring power from an AC supply outputting an AC voltage comprising;
- a controller,a primary rectifier defining a first primary node and a second primary node and connected to the AC supply for converting the AC voltage to a DC bus voltage,an inverter coupled with said primary rectifier and said controller for converting the DC bus voltage to a primary AC voltage,a primary coil connected to said inverter for producing an alternating magnetic field in response to receiving the primary AC voltage,a secondary coil in communication with said primary coil for producing an induced AC voltage in response to the alternating magnetic field from said primary coil,a secondary rectifier connected to said secondary coil for rectifying the induced AC voltage from said secondary coil to a secondary DC voltage,said primary rectifier including a first rectifier switch connected between said second primary node and the AC supply and coupled to said controller and a first rectifier diode connected between said first primary node and the AC supply,said primary rectifier including a second rectifier switch connected between said second primary node and the AC supply and coupled to said controller and a second rectifier diode connected between said first primary node and the AC supply,said controller configured to control said first rectifier switch and said second rectifier switch for varying the DC bus voltage to produce a desired secondary DC voltage.
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Accused Products
Abstract
A power transfer system and method are provided for transferring power from an AC supply outputting an AC voltage. The system includes a controller and a primary rectifier coupled to the controller and to the AC supply for converting the AC voltage to a DC bus voltage. An inverter is coupled with the primary rectifier and the controller for converting the DC bus voltage to a primary AC voltage. A primary coil is connected to the inverter. A secondary coil is in communication with the primary coil for producing an induced AC voltage. A secondary rectifier is connected to the secondary coil for rectifying the induced AC voltage to a secondary DC voltage. At least one sensor is connected to the secondary rectifier for outputting a signal proportional to the secondary DC voltage and the controller is configured to vary the DC bus voltage based on the signal from the sensor.
12 Citations
20 Claims
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1. A power transfer system for transferring power from an AC supply outputting an AC voltage comprising;
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a controller, a primary rectifier defining a first primary node and a second primary node and connected to the AC supply for converting the AC voltage to a DC bus voltage, an inverter coupled with said primary rectifier and said controller for converting the DC bus voltage to a primary AC voltage, a primary coil connected to said inverter for producing an alternating magnetic field in response to receiving the primary AC voltage, a secondary coil in communication with said primary coil for producing an induced AC voltage in response to the alternating magnetic field from said primary coil, a secondary rectifier connected to said secondary coil for rectifying the induced AC voltage from said secondary coil to a secondary DC voltage, said primary rectifier including a first rectifier switch connected between said second primary node and the AC supply and coupled to said controller and a first rectifier diode connected between said first primary node and the AC supply, said primary rectifier including a second rectifier switch connected between said second primary node and the AC supply and coupled to said controller and a second rectifier diode connected between said first primary node and the AC supply, said controller configured to control said first rectifier switch and said second rectifier switch for varying the DC bus voltage to produce a desired secondary DC voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A power transfer system for transferring power from an AC supply outputting an AC voltage comprising;
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a controller, a filter connected to the AC supply for filtering out undesirable frequencies from the AC voltage and outputting a filtered AC voltage, a primary rectifier being an active rectifier and connected to said filter and said controller for converting the filtered AC voltage to a variable DC bus voltage, a DC storage capacitor connected to said primary rectifier for retaining the DC bus voltage, an inverter being of the half bridge type and coupled with said primary rectifier and said controller for converting the DC bus voltage to a primary AC voltage, a primary coil connected to said inverter for producing an alternating magnetic field in response to receiving the primary AC voltage, a secondary coil in communication with said primary coil for producing an induced AC voltage in response to the alternating magnetic field from said primary coil, a secondary rectifier of the full bridge type coupled to said secondary coil for rectifying the induced AC voltage from said secondary coil to a secondary DC voltage, at least one sensor coupled with said secondary rectifier and in communication with said controller for monitoring the secondary DC voltage and outputting a proportional signal, and said controller configured to control said primary rectifier for varying the DC bus voltage in response to the signal from said sensor and to control said inverter to produce a desired secondary DC voltage. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A method of power transfer comprising the steps of:
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supplying an AC voltage with an AC supply, switching at least one rectifier switch of a primary rectifier with a controller, producing a DC bus voltage with the primary rectifier, switching at least one inverter switch of an inverter with the controller at a predetermined switching frequency, producing a primary AC voltage from the variable DC bus voltage with the inverter at a desired operating frequency, supplying the primary AC voltage to a primary coil, producing an alternating magnetic field in response to the primary AC voltage with the primary coil, producing an induced AC voltage in a secondary coil in response to the alternating magnetic field from the primary coil, converting the induced AC voltage to a secondary DC voltage with a secondary rectifier, varying the DC bus voltage using the controller, and varying the secondary DC voltage. - View Dependent Claims (17, 18, 19, 20)
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Specification