How does the output voltage of a SSR work?
When the “coil” receives its required voltage (SW1 closes below) it closes the internal “contact”. In a normal relay, this is an electromechanical process. In an SSR it is an electronic process. Either way, this keeps both sides isolated from each other.
What does a voltage divider circuit look like?
A voltage divider circuit will normally look like this in a circuit with a series of 2 resistors. R1 = Resistor closest to input voltage (Vin) R2 = Resistor closest to ground V in = Input Voltage
What makes a SSR a solid state relay?
A Solid-State Relay (SSR) is just that: a solid-state (semiconductor) version of a relay. A relay is an electro-mechanical switch that either connects or disconnects contacts together under control of an electro-magnet within it. So your SSR is an on-off switch. Unlike an electro-mechanical relay, it has no moving parts or electro-magnet.
How to control the output voltage of a solid state relay?
Considering this solid state relay: The output voltage can be from 24 to 380V. How can I control this voltage? Is it proportional to the input voltage? What I need is a voltage regulator that can be controlled from a Raspberry Pi in order to control the speed of a fan. Currently, I use something as below that works as expected.
How is an SSR different from an electromechanical relay?
An electromechanical relay uses magnetic fields to provide isolation; an SSR, in contrast, achieves this goal generally through opto-coupling. As shown in Figure 2, in an SSR a small input voltage, typically 3 to 32 VDC, is used to illuminate an LED.
What happens when voltage is less than the rated voltage?
When the voltage is less, less current flows through them. When voltage is more, more current will flow through them. So when voltage is less, the output of these appliances will be less or the bulb will give less light, room heater will heat less, water heater will heat slowly.
What kind of voltage does a solid state relay need?
Solid state relays are available that operate with input voltages of anywhere from a few volts upwards. DC or AC input: If the SSR is intended for operation with a DC input then it can operate with a minimum of additional electronic components – possibly just a current limiting resistor.