Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

  • Congratulations JStephen on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Varistor function with AC motor

Status
Not open for further replies.

jkernan7

Electrical
Joined
Apr 5, 2005
Messages
2
Location
US
How does a varistor function in controlling the rotation of an AC motor?
 
A varistor is a voltage dependent resistor that starts conducting heavily above a certain voltage. It can not, to my knowledge, be used to control the rotation (speed?) of any motor. And absolutely not the rotation of an AC motor.

Do you mean thyristor?
 
I was trying to understand how my 115v AC wench (1500lb load) accomplished the reversal. I have since learned that the varistor is shunting a bridge rectifier and that the motor is actually a DC motor!

Thank you for the prompt reply.

John Kernan
 
Status
Not open for further replies.

Part and Inventory Search

Sponsor

Back
Top