Friday, February 24, 2012

How Solid State Relays Work

If you've ever worked on a 12 Volt starter motor you have a good idea how a mechanical electromagnet works. A similar component called a Solid State Relay (SSR) works the same way but has no moving parts. It switches electronically using a small control signal that turns on a larger load voltage or current.

Solid State Relays are known for their reliability and high duty cycles. With no moving parts solid state relays offer quiet operation and work comfortably with loads up to 25 amps. These relays can also be designed to be switched AC or DC to the load.

 It has a voltage or current sensor that reacts to an input control signal (solid state electronic switching device) that switches power to the appropriate load to the on or off position.

 This short video will show you how an SSR can be used to switch a string of lights and then a floor lamp on and off using a BS2 HomeWork Board.

Solid state relays have numerous applications such as:
• LED Ballasts
• General Illumination
• Architectural Lighting
• Stage Lighting
• Automotive Lighting
• Relay/Solenoid Drive
• Fan Control

1 comment :

Anonymous said...

nice description of a solid state relay. The videoi makes it easy to see how quiet they are and how they can be programmed.