Prime mover

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Prime mover is a machine, such as a engine or a motor, that receives and modifies energy as supplied by some natural source or fuel and transforms it into mechanical work.
Prime mover is a machine, such as a engine or a motor, that receives and modifies energy as supplied by some natural source or fuel and transforms it into mechanical work.

Prime mover is a machine, such as a engine or a motor, that receives and modifies energy as supplied by some natural source or fuel and transforms it into mechanical work.

Either diesel engines or electric motors can function as prime movers. The power can range from under 10 hp (7.46 kW) for the smallest of lifts, to more than 1,000 hp (745.70 kW) for a long, fast detachable eight-seat up a steep slope. DC electric motors and DC drives are the most common, though AC motors and AC drives are becoming economically competitive for certain smaller chairlift installations.

DC drives are less expensive than AC variable-frequency drives and were used almost exclusively until the 21st century when costs of AC variable-frequency drive technology dropped. DC motors produce higher starting torque than AC motors, so applications of AC motors on chairlifts is largely limited to smaller chairlift installations, otherwise the AC motor would need to be significantly oversized relative to the equivalent horsepower DC motor.

The driveshaft turns at high RPM, but with low torque. The gearbox transforms high RPM/low torque rotation into low RPM/high torque to drive the bullwheel. Higher power is able to pull heavier loads, or sustain a higher rope speed.


[edit] Also See

[edit] Reference

  • Skilifts.org Carrier [1]

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