The structure of the hollow cup motor breaks through the traditional rotor structure of the motor, using a coreless rotor, also known as the hollow cup rotor.The new rotor structure completely eliminates the power loss caused by the eddy current formed by the core.So what are the advantages of hollow cup motors over ordinary dc motors?
What are the advantages of hollow cup motor?
1. High power density
Power density is the ratio of output power to weight or volume.Copper coil motor small size, good performance.Compared with traditional coil, copper plate coil model induction coil is lighter.Without winding and grooving the silicon steel sheet, the eddy current and hysteresis loss caused by them are eliminated.The eddy current loss in copper-plate coil mode is very small and easy to control, which improves the efficiency of the motor and ensures higher output torque and power.
2. Efficient
The efficiency of the motor lies in the fact that the copper coil has no eddy current and hysteresis loss caused by winding and grooving silicon steel sheet.In addition, the resistance is small, reducing copper loss.
3. No torque hysteresis
Copper plate coil mode without groove silicon steel sheet, no hysteresis loss, no tooth groove effect to reduce speed and torque fluctuations.
4. No slot effect
The copper coil is made of silicon steel with no groove, which eliminates the groove effect caused by the interaction between the groove and the magnet.A coil is a structure without an iron core.All steel components either rotate together (e.g. brush motor) or are stationary (e.g. brushless motor).Slot effect and torque hysteresis obviously do not exist.
5. There is no radial force between rotor and stator
Since there is no stationary ferrite core, the axial magnetic field between motor rotor and motor stator cannot be found.This is especially critical in important applications.Because of the axial force between the motor rotor and the motor stator, the motor rotor is unstable.Reducing axial force will improve the reliability of motor rotor.
6. Smooth speed curve and low noise
There is no grooved ferrite core, which reduces the harmonic of rotation distance and working voltage.Because the AC field cannot be found in the motor, there is no noise caused by AC.Only noise from rolling bearings and cyclones and vibration from non-sinusoidal waveforms.
7. Good heat dissipation effect
Copper coin solenoid coil inside and outside the surface often has gas fluidity, which is better than the slot motor rotor solenoid coil of the heat pipe heat dissipation.The traditional silk covered wire is embedded in the groove of ferrite core. There are very few surface cyclones in the electromagnetic coil.For the same power, copper coin electromagnetic coil method of the motor temperature is smaller.
Post time: Oct-11-2019
