Motor Control Resistors

These resistors are used to control the torque and speed of AC and DC motors, along with limiting in-rush current. To avoid confusion it should be noted that these resistors are used to control energy input into motors while Dynamic Braking Resistors are used to brake and drain energy.

Motor Control Resistors are commonly used with wound-rotor motors as an external resistor circuit. Conductors in the rotor are connected to slip rings, these slip rings provide the contact to the resistor circuit. By changing the level of resistance in the circuit (the Motor Control Resistor), speed and torque can be adjusted. In other words, higher resistance means reduced torque and speed. 

Our motor control resistors have number of different types of motor control applications including:

• Wound rotor AC motors with slip ring starting resistors
• Star-delta closed transition starting resistors
• Squirrel cage AC motor resistors
• Crane control systems
• DC series wound motor resistors
• Field discharge resistors 

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