Braking Resistors

Braking resistors are power resistors that convert into heat the energy returned to the drive's DC bus by a motor being decelerated by a motor drive and acting like a generator. They are used in applications with fast stops or downward load movement, such as cranes, elevators, centrifuges, winders and high-inertia fans, to prevent DC bus overvoltage faults and shorten the stopping time. The category includes Isıso and GMT-brand models in powers such as 200 W, 500 W, 1000 W and 4000 W and resistance values such as 16 Ω, 30 Ω, 75 Ω and 200 Ω; for Isıso products, the compatible single-phase 220 V and three-phase 380 V drive power is stated in the product data. Choose the resistance value so that it does not fall below the lowest ohm value permitted by the drive manufacturer, and the power according to the braking frequency and the load inertia; verify from the manufacturer data whether your drive has a built-in braking chopper. A braking resistor is not a substitute for a braking module; drives without a built-in chopper need a separate braking module that switches the resistor in.

Products

How to choose Braking Resistors

Braking resistors are power resistors that convert into heat the energy returned to the drive's DC bus by a motor being decelerated by a motor drive and acting like a generator. They are used in applications with fast stops or downward load movement, such as cranes, elevators, centrifuges, winders and high-inertia fans, to prevent DC bus overvoltage faults and shorten the stopping time.

  • Separate sensing, motion control, logic processing and operator interface requirements.
  • Select signal type, supply voltage, communication protocol and I/O count for the machine network.
  • Verify housing size, sensing distance and PNP/NPN output polarity against the PLC input card.

Frequently asked questions

What is Braking Resistors and where is it used?

Braking resistors are power resistors that convert into heat the energy returned to the drive's DC bus by a motor being decelerated by a motor drive and acting like a generator. They are used in applications with fast stops or downward load movement, such as cranes, elevators, centrifuges, winders and high-inertia fans, to prevent DC bus overvoltage faults and shorten the stopping time.

What should I compare when choosing Braking Resistors?

Choose the resistance value so that it does not fall below the lowest ohm value permitted by the drive manufacturer, and the power according to the braking frequency and the load inertia; verify from the manufacturer data whether your drive has a built-in braking chopper.

Where can I find technical details for Braking Resistors products?

Choose the resistance value so that it does not fall below the lowest ohm value permitted by the drive manufacturer, and the power according to the braking frequency and the load inertia; verify from the manufacturer data whether your drive has a built-in braking chopper.

Braking Resistors Selection Guide: Technical Criteria and Engineering Practice