DC motors and torque

What this note covers

1. Opposite coil forces create a turning couple
2. Define the coil angle before applying the torque equation
3. The split-ring commutator maintains a rotation direction
4. Back emf connects rotation, current and load
5. Relate useful shaft output to torque and angular speed
6. Measure torque and performance with controlled comparisons

6 sections · 10 key terms & formulas · 6 common mistakes