Portescap in Motion

Understand What Factors Influence the Stall Torque of a Brushless DC Motor

Posted by Matthieu Bouat   Jan 27, 2022

Understand What Factors Influence the Stall Torque of a Brushless DC Motor

Apply sufficient power to a brushless DC (BLDC) motor, and it turns. Remove the power, and it stops. But there is a condition in between where power is applied but the motor is not moving. This is a motor that is at stall. In this state, with power applied, it is very much a live motor; just because it isn’t turning doesn’t mean current isn’t flowing through the windings - actually just the opposite. At stall, an excess of current is flowing, heating up the motor coils; if stall conditions are maintained, or frequently repeated, these stresses can quickly add up to trouble.

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Topics: Portescap, Brushless DC motors, motors, coils, design engineering, motor drive package, stall torque, design considerations

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