Exterior rotor brushless motor with inner rotor brushless motor difference
inner rotor and outer rotor, the difference is inside or outside. Rotating part is part of an embedded magnets, not usually part of are part of a coil. Inside the rotor weight the same case, did not go outside of the moment of inertia is big, so turn the kv high torque and low, inside turn out just the opposite. Small converted motor torque, high rotation speed, general use transport model (Such as cars, boats and helicopters)。 The outer rotor motor heat dissipation is better. If converted motor burn out, brushless motor, maintenance is difficult, because its can't round and enameled wire, outer can repair. Exterior rotor brushless motor with inner rotor brushless motor difference in where?
1. The same level (Outside diameter)Brushless motor, electric test exterior rotor motor torque is bigger than inner rotor and the parameters are: 800 kv value, exterior rotor motor rotor motor - 10002000 kv value.
2. Inside the rotor of the motor speed is higher than that of external rotor motor, because of the features are related with the KV value, by definition to explain, brushless motor idling speed is & other; Throughout the KV value multiplied by the input voltage &; , it is proved that the rotor of the motor speed higher than that of exterior rotor brushless motors.
3. For torque characteristics, KV value a sense embodies the motor torque performance, exterior rotor motor test no load speed, brushless dc motor, but add load (Such as propeller)After its landing speed to the no-load speed of 60%70%.
4. Level with the inner rotor motor testing, the speed can only load to the no-load speed of 30%40%, and the inner rotor motor load capacity is relatively low, in order to satisfy the torsion work, inner rotor motor required to slow down and increase by electric current, in the case of constant voltage, the motor output power is increased, the inner rotor motor torque characteristic is reflected on the specific application.
