Characteristics and Classifications of the Hub Motor
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1. Features of the Wheel Hub Motor
2. Types of hub motor
Wheel hub motor technology is also called in-wheel motor technology. Wheel hub for motor is the motor embedded in the wheel, the stator is fixed on the tire, the rotor is fixed on the axle, and the stator and rotor move relative to each other when power is applied. The electronic phase converter (switch circuit) controls the energization sequence and time of the stator windings according to the position sensor signal, generates a rotating magnetic field, and drives the rotor to rotate. Its biggest feature is that the power, transmission and braking devices are integrated into the wheel hub, thus greatly simplifying the mechanical part of the electric vehicle.
The wheel hub motor is simple in structure, sturdy and durable, low in cost, and reliable in operation. A large number of transmission components can be omitted, making the vehicle structure simpler and realizing a variety of complex driving methods. So what are the characteristics of the wheel hub motor?
Features of the Wheel Hub Motor
The wheel hub motor has simple structure, sturdiness and durability, low cost, reliable operation, small torque ripple, low noise, no position sensor, and high speed limit; the disadvantage is that the drive circuit is complex and the cost is high. Compared with permanent magnet motors, The efficiency and power density of asynchronous motors are low;
2. The wheel hub motor can adopt cylindrical radial magnetic field structure or disc axial magnetic field structure, with high power density and efficiency, and wide speed range, and its development prospects are very broad;
3. The wheel hub motor has the characteristics of simple structure, low manufacturing cost, and good speed/torque characteristics. The wheel hub motor is not only suitable for electric bicycles, but also suitable for electric vehicle driving; the disadvantage is that the design and the controlling are very difficult and precise, and the operation noise is large.
Types of the Wheel Hub Motor
Hub motor types are mainly divided into five types, that is, brush and brushless motor; with sensor and with sensor; with and without gears; with and without clutch mechanism; high speed and low speed.
Brushed motor VS Brushless motor
Due to the low efficiency, brush motors for vehicles have been phased out. brushless wheel hub motor is still in use. Here, we present the key differences between e-bike brushless motors and brushed motors:
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