Dynamic Braking Resistors from Axis Controls

Axis Controls stock a range of Dynamic Braking Resistors, suitable for installation in a brand new electrical control system, or as a retrofit adjustment.  Dynamic braking resistors are a compact and cost-effective way to control the braking and dissipation of heat and energy produced by electric motor driven machinery being stopped. 

What does a Braking Resistor do?

Generally, a resistor is used to consume; or dissipate heat.  By doing this, they can be used to stop, or slow down, a mechanical system.   To decelerate an electric motor in this way, kinetic energy is transformed back into electrical energy.

Generally, the speed of modern three-phase motors is controlled by variable frequency drives; also called variable speed drives and inverters. The AC frequency of the VFD output voltage determines the motors speed and can be adjusted accordingly.  If this drive is serving as a generator, this generated energy results in a voltage increase in the DC bus of the variable speed drive.  To prevent damage to this DC bus; the voltage must remain below a certain value but feeding this energy back into the grid is not economical.  Instead, this extra energy is converted into heat using a dynamic braking resistor.

What are the advantages of using Dynamic Braking Resistors?

  • Lower rate of wear for components within a control or automation system
  • Stricter control of motor voltage; keeping this within safe levels
  • Faster, and more responsive, braking of AC and DC motors
  • Less servicing of equipment required

Speak to a member of our team to find out more about Dynamic Breaking Resistors and which solutions Axis Controls can offer.  Axis Controls specialise in the production of complete bespoke electrical control panels and can advise on the best, and most cost-effective, solution for your business.