Brushless or Brushed: Choosing the Right DC Drive for Mobile Equipment
Brush life, controller cost, efficiency and service access decide the answer more often than torque density alone. A comparison for vehicle and outdoor machine designers.
For mobile equipment on a 12 V to 48 V supply, both brushed and brushless DC gear motors remain in production. The choice is rarely about which technology is newer, and more about total cost across the service life of the machine.
Where brushed still wins
A brushed gear motor needs only a two-wire supply and a simple relay or PWM stage to run. For intermittent-duty mechanisms such as slide-outs, flaps, valves and barrier arms, where annual running hours are low, the brush system never reaches its wear limit and the lower system cost is decisive.
Where brushless is the right call
Continuous-duty drives, high ambient temperatures and applications where the motor cannot be reached for service all favour brushless construction. Efficiency at the operating point is typically several percentage points higher, and there is no brush wear to schedule.
- Running hours above 2,000 per year
- Ambient temperature above 40 °C at the motor
- Sealed or inaccessible installation position
- Precise speed or position control required
Decide on the duty cycle
Send us the supply voltage, load torque, speed, duty cycle and annual running hours of your application. Our engineers will compare a brushed and a brushless solution side by side, including the controller, and recommend the lower total-cost option.