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US 6,583,703 B2Granted
Electrical apparatus having an electromagnetic device operable at multiple inductance values
AssigneeKoninklijke Philips Electronics N.V.
InventorYushan Li
Life of this patent
Estimating the term…
Abstract
An electrical apparatus and method for matching the input power source and output impedance of the electrical apparatus utilizes electromagnetic devices having two or more inductive windings, which may be connected in various series and/or parallel circuit configurations, by inserting them into a circuit board specially configured to accept my improved electromagnetic devices, and attaching jumpers to the circuit board for selecting the particular inductive windings to be incorporated into the electrical apparatus. The windings not selected for a given electromagnetic apparatus remain unconnected within the electromagnetic device.
Claims16
An electrical apparatus comprising:
- an electromagnetic device having at least a first and a second winding of common polarity, the electromagnetic device further including pins electrically connected to the windings and adapted for attachment to a circuit board;
- a circuit board having an electrical circuit, and adapted to receive the pins of the electromagnetic device;
- and
- one or more jumpers adapted for attachment to the circuit board in a manner connecting the pins of the electromagnetic device to the electrical circuit to alternatively form a series or parallel electrical connection between at least one of the first or second windings and the electrical circuit.
1 more element
An electrical apparatus comprising:
- an electromagnetic device having a first and a second winding of common polarity, the electromagnetic device further including pins electrically connected to the windings and adapted for attachment to a circuit board;
- a circuit board having an electrical circuit, and adapted to receive the pins of the electromagnetic device;
- one or more jumpers adapted for attachment to the circuit board in a manner connecting the pins of the electromagnetic device to the electrical circuit to alternatively form an electrical connection between the first or second windings and the electrical circuit;
- wherein each of the first and second windings includes a starting end and a finishing end, with the starting end of the first winding being connected to a first pin, the finishing end of the first winding and the starting end of the second winding being connected to a second pin, and the finishing end of the second winding being attached to a third pin of the electromagnetic device;
- and
- wherein the electrical circuit is configured in such a manner that with a jumper attached in a first position between the electrical circuit and the second pin of the electromagnetic device, the first winding is connected to the electrical circuit and the second winding is not connected to the electrical circuit, and with the jumper alternatively connected in a second position between the electrical circuit and the third pin of the electromagnetic device that the first and second windings are commonly connected to the electrical circuit in a series circuit configuration, the electromagnetic device thereby providing increased inductance when attached to the electrical circuit with the jumper in the second position.
3 more elements
An electrical apparatus comprising:
- an electromagnetic device having a first and a second winding of common polarity, the electromagnetic device further including pins electrically connected to the windings and adapted for attachment to a circuit board;
- a circuit board having an electrical circuit, and adapted to receive the pins of the electromagnetic device;
- a plurality of jumpers comprising a first set and a second set of the jumpers adapted for attachment to the circuit board in a manner connecting the pins of the electromagnetic device to the electrical circuit to alternatively form an electrical connection between the first or second windings and the electrical circuit;
- wherein each of the first and second windings of the electromagnetic device includes a starting end and a finishing end, with the starting end of the first winding being connected to a first pin, the finishing end of the first winding connected to a second pin, the first end of the second winding being connected to a third pin and the finishing end of the second winding being attached to a fourth pin of the electromagnetic device;
- and
- wherein the electrical circuit is configured in such a manner that with the first set of the jumpers attached in a first position between the electrical circuit and the first and second pins of the electromagnetic device, and the second set jumpers attached between the electrical circuit and the third and fourth pins of the electromagnetic device, the first and second windings are connected in a parallel circuit arrangement to the electrical circuit.
3 more elements
Dependencies are inferred from the claim text.