Brushless Servomotors

The brushed DC motor was invented in 1856 by Ernst Werner von Siemens (famed inventor and founder of the electronics brand Siemens). This type of motor uses metal brushes to carry the current, and can use direct current. For over 100 years, brushed DC motors were the go-to until the brushless motor was introduced in the 1970s.

In 1979 Indramat’s brushless AC Servo made its way onto the scene and set the standard for motion control. It also proved to be crucial in high performance automotive Powertrain manufacture.

The nice thing about brushless servomotors is that they do not require a physical commutator. No physical commutator means fewer moving parts — which means less physical wear and tear. That makes brushless motors ideal for uses when the motor is really being worked hard – robotics, computer drives, and the like. Brushless servomotors are also less likely to produce electrical noise which makes them perfect for audio equipment and computers.

You would think that a motor invented in 1979 would be more efficient than one invented in 1856. You would be right. There are instances where either brushed or brushless motors could be used, but the difference in efficiency makes brushless motors the better choice. Brushed motors operate at around 75-85% efficiency whereas brushless motors can operate with 96% or higher efficiency. Plus, brushless motors are pound for pound more powerful than brushed motors.

Indramat brushless servomotors last an incredibly long time. So long that any initial cost is negligible when considering the hours you get out of it.

If your Indramat servo motor is in need of support, you should call us. We can provide phone support, factory rebuild, or emergency replacement units, according to your needs. We can even fly out an emergency unit if time is truly of the essence.