Mac 450rpm Electric Bike Motor

Keyword:    450rpm electric bike motor

Brief

The Mac Hub Motor is a High Power, High Torque, Geared Hub Motor intended for Bicycle wheels from 16” to 700C. Rated Output power is typically between 250 to 1000W depending upon the motor winding selected and the operating voltage. Faster motors and higher voltages tend to offer higher output power levels. An internal 5:1 planetary gear with clutch is implemented. Composite Planetary Gears are now standard to ensure a long trouble free life. The gear reduction allows the motor to spin at a higher and more efficient rpm greatly improving the starting torque and hill climbing ability when compared with comparable Direct-Drive motors, whilst also being smaller and lighter than a comparable DD motor. The clutch offers minimal drag when not under power. Unlike the majority of geared motors on the market, the Mac 500/1000W Hub Motor is built for the high power demands of the US market, not the highly restricted EU market. The slower wound versions could still be used and stay within the EU speed limit, for those requiring more hill climbing ability than typical 250W motors currently available. There is also a smaller 250/350W version of the Mac Hub Motor, which is ~0.5kg lighter and has a smaller motor structure than the 500/1000W version.

The Mac motor uses a 32 magnet, 16 pair poles motor unlike the vast majority of Geared motors on the Market which use an 8 pair poles motor. This further improves torque, but does mean that the electrical rpm or commutation frequency is higher than typical geared motors and much higher than Direct-Drive motors, so some care with controller selection is required. The Mac rear motor allows both disk brake and 7 speed freewheel to be used on the standard 135mm dropout. The Front 500/1000W Mac motor is now available with disc brake and is compatible with standard 100mm fork dropout.

The Mac motor is recommended for use at 36V or 48V with a recommended controller limit of 25-30A (up to 40A and 2000W max input power can be used, if used moderately). We typically recommend the motor is configured for 32-40km/h (20-25mph) when used on steep gradients, but it can be safely configured for up to 50km/h (30mph) max speed when used on mainly flat ground.

Mac 500W Front Motor outline drawing (with disc): 
http://sdrv.ms/1aygnZZ

Mac 500W Rear Motor outline drawing: 
http://sdrv.ms/19m6HAh

Specification: