DC Braking

What is a DC injection brake & how does it work?

A DC injection unit is an electronic device that provides smooth frictionless braking of ac motors. It doesn't use brake discs or shoes so doesn't wear out or need maintenance.

It creates a DC stationary 0Hz magnetic field in place of the rotating 50Hz field. This brakes the rotor until it's also stationary.

The addition of a DC injection brake to an existing machine can be as simple as replacing the existing starter and fitting a new starter with built-in braking unit.

Safety and machine limitations must be taken in to account. See DC injection braking sizing notes (available on request).

We have a range of units that offer an economical electrical solution to the requirement of motor braking.

DC Braking with DOL Starters

Simple direct-on-line starters that use DC braking every time, ideal for making woodworking machines compatible with PUWER 98.

DC Braking with Star/Delta Starters

For reducing start-up current on larger motors.

Emergency Braking with DC Injection Brakes

Emergency stopping unit for use along side existing starters.

DC Injection Braking Modules only

For integration into existing set-ups. Available for standard braking, emergency braking, and increased brake time.


All of our units are built and designed in-house, if you can't find what you need we can commission a unit specific to your needs. Please contact us and tell us what you need.


Replacing obsolete Pilz PKB or Thiim EMBA, EMBB & EMPU

Our dc injection unit modules are designed to replace the discontinued Pilz PKB Electronic braking system.
Pilz PKB Electronic brake details.

The Thiim EMBA, EMBB & EMPU electronic DC injection motor brakes have also been discontinued. Our modules have been designed to directly replace these.
Thiim motor brake details.


Click here for more information on DC injection brakes