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Technology
Motor technology
Electric Motors
External Rotor Topology
Surface Permanent Magnets
Patented Winding
Patented Cooling Circuit
Patented Lamination Profile
Inverter Technology
External Rotor Topology
Compared to rotor centric permanent magnet motors, the external rotor topology (where the rotor rotates on the outside of the stator) has a larger magnetic flux.
TM4’s PM motor technology results in:
Higher power density
Higher torque density
Increased effective air gap radius:
The torque of an electric motor is the product of the magnetic force and the length of the radius of the magnetic flux. Thus, the farther the magnetic flux is from the axle, the more torque is generated.
In a set diameter, the external rotor topology has a longer radius than any other topologies, thus generating more torque with less material.