Low conducted emission solid state switch
First Claim
1. A solid state switch, comprising:
- an output switch circuit comprising a first plurality of semiconductor switching devices, wherein the plurality of semiconductor switching devices selectively provide power to a load from a voltage source when enabled; and
an input circuit comprising a second plurality of semiconductor switching devices, wherein each of the second plurality of semiconductor switching devices is electrically coupled to a gate of a corresponding one of the first plurality of semiconductor switching devices, wherein each of the second plurality of semiconductor switching devices comprises a primarily resistive characteristic when enabled.
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Accused Products
Abstract
A solid state switch may include a plurality of inputs, such as to receive a control signal to cause the solid state relay to selectively deliver power from an AC power source to an electrical load (e.g., a heater, a pump, a lighting source, a motor, etc.). The solid state switch may include at metal-oxide-semiconductor field-effect transistors (MOSFETs) connected in a series opposition arrangement, where a gate of each of the MOSFETs may be electrically connected to a corresponding one of the plurality of inputs. A signal output from the MOSFETs may provide a triggering signal at a gate input of each of a corresponding semiconductor switching device to close the solid state relay to enable power delivery from the AC power source to the electrical load.
27 Citations
20 Claims
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1. A solid state switch, comprising:
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an output switch circuit comprising a first plurality of semiconductor switching devices, wherein the plurality of semiconductor switching devices selectively provide power to a load from a voltage source when enabled; and an input circuit comprising a second plurality of semiconductor switching devices, wherein each of the second plurality of semiconductor switching devices is electrically coupled to a gate of a corresponding one of the first plurality of semiconductor switching devices, wherein each of the second plurality of semiconductor switching devices comprises a primarily resistive characteristic when enabled. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system for controlling power delivery to a load from an alternating current (AC) source, comprising:
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a solid state switch comprising; a plurality of inputs electrically connected to a control circuit, the control circuit providing a command to trigger the solid state switch to close; a plurality of outputs electrically connected between a power source and a load, wherein the command to trigger the solid state switch to close results in power delivery from the power source to the load; and wherein an amount of conducted emissions introduced onto power lines between the power source and the solid state switch are at least 10 percent less than a threshold associated with a maximum allowable amount of conducted emissions introduced onto the power lines as defined by a conducted emissions standard. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A solid state relay comprising:
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a plurality of inputs; at least two metal-oxide-semiconductor field-effect transistors (MOSFETs) connected in a series opposition arrangement, wherein a gate of each of the at least two MOSFETs is electrically connected to a corresponding one of the plurality of inputs; and at least two semiconductor switching devices, each comprising a gate input, wherein an output of each of the at least two MOSFETs provides a triggering signal at the gate input of each of a corresponding semiconductor switching devices to enable power delivery from a power source to a load.
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Specification