Motor arus searah — banyak kumparan
A single-coil motor delivers torque in uneven pulses and stalls at the dead points. Adding more coils around the armature fixes both problems, and running this simulation alongside the single-coil version makes the improvement obvious in the torque trace.
Cara memakai simulasi ini
- Change the number of coils on the armature
- Vary the current and the magnetic field strength
- Slow the rotation down to follow the commutator switching
Yang perlu diamati
- Torque ripple shrinks noticeably with each coil you add
- The motor no longer has a dead spot where it can stall on starting
- Average torque rises in proportion to the number of active coils
Fisika di baliknya
Torque on one coil follows τ = BIAN·cosθ, falling to zero when the coil plane is perpendicular to the field. With several coils set at different angles, one is always well-placed to produce torque, so the total never drops to zero. The commutator switches each coil in turn as it passes through its optimum position.