Magnet retention
The sleeve provides mechanical retention at high speeds.
Application & Value
E-Motor Composite Rotor Sleeve
Retain rotor magnets at high rotational speeds.
Challenge
Centrifugal loads increase with rotor speed. Magnet retention must withstand these loads while fitting the motor’s limited space.
Solution approach
A circumferential composite sleeve retains surface-mounted magnets on the rotor and carries the hoop loads caused by rotation. Its load-bearing structure requires little additional space. The sleeve also influences electromagnetic and thermal behaviour, so it is considered as part of the motor.
The benefits
Compact structure
A thin load-bearing shell supports compact packaging.
Lower electrical losses
Suitable composite sleeves can reduce eddy-current losses compared with metallic sleeves. The effect depends on the motor design.
What could this mean for your product?
A small structural component can influence several properties of the overall system. In a rotor sleeve, these include mechanical load capacity, packaging and electrical losses. For other products, it is therefore useful to consider how a component interacts with its surroundings.
Value Drivers
Related applications
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