US 2020/0052688 A1 · ULTRA LOW EMISSION SOLID STATE RELAY

Abstract

According to one embodiment, a solid state relay with ultra low emissions is disclosed. The solid state relay includes one or more inputs for receiving a control signal, an input circuit for processing the received control signal. An output circuit responsive to the control signal to close the solid state relay so that power may be delivered from a power source to an electrical load. The input circuit can include zero-crossing functionality configured such that the solid state relay does not turn on until an AC source signal crosses from a negative value to a positive value or from a positive value to a negative value. The zero crossing functionality may comprise opto-couplers with zero crossing functionality. The input circuit may further comprise a low emission driver portion that is to reduce emissions during the portion after the initial start up.

Claims15

Dependent claims

A solid state switch comprising:

an output circuit comprising a plurality of switching devices, wherein the plurality of 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;
and
wherein the second plurality of semiconductor switching devices comprise a plurality of optocoupler devices with zero crossing detection functionality;
wherein the second plurality of semiconductor switching devices are configured to turn on the output circuit upon the zero crossing of a control signal applied to the second plurality of semiconductor switching devices.

3 more elements

Dependencies are inferred from the claim text.

Ultra low emission solid state relay

Life of this patent

Ultra low emission solid state relay

Life of this patent

Abstract

Claims15