AC vs DC Relay 🤷♂️
DC relays work by winding a copper coil around a soft iron core to create an electromagnet. It’s function remains same regardless of the coil's polarity, so it can also work with an AC without issues.
However, since the AC current approaches zero during each cycle, the relay’s magnet can lose its strength, which might cause it to chatter.
To solve this issue, a shading ring made of copper or aluminum is used. It is basically a one-turn coil. A current induced in the shading ring by the primary coil's magnetic field helps maintain the relay contact even when the primary coil current becomes zero.
#electronics #relay
DC relays work by winding a copper coil around a soft iron core to create an electromagnet. It’s function remains same regardless of the coil's polarity, so it can also work with an AC without issues.
However, since the AC current approaches zero during each cycle, the relay’s magnet can lose its strength, which might cause it to chatter.
To solve this issue, a shading ring made of copper or aluminum is used. It is basically a one-turn coil. A current induced in the shading ring by the primary coil's magnetic field helps maintain the relay contact even when the primary coil current becomes zero.
#electronics #relay