Brake Chopper – Bosch Rexroth

If the drive system has regenerative energy and is unable to feed it back into the grid, make it available to other axes, or redirect it to storage, then it is converted into heat via the brake resistors. To do this, the brake chopper turns the brake resistors on/off, thereby limiting the DC-bus voltage to a permissible value. Furthermore, the DC-bus can be discharged via the brake chopper.