Ultra High Efficiency Halbach Motors (UHEHM1 Series)
Invented by Klaus Halbach in the 1980s at Lawrence Berkeley National Laboratory, the Halbach array is a unique arrangement of permanent magnets that augments the magnetic field on one side of the array and cancels the field on the other side of the array. The result is a series of novel “ironless” electric permanent-magnet motor/generators designs using the Halbach array with high power density, high specific power, and low losses—even at high speeds.
These motor designs leverage a passive cooling method in conjunction with a proprietary magnetic construction based on a Halbach array that results in a very light, very compact motor assembly with very smooth commutation and unmatched efficiency and smoothness of motion. They are especially suitable for weight- and volume-sensitive applications such as UAV propulsion and mobile hybrid electric generator motors.
Top Flight Technologies, with our partner IIMANII™, is proud to offer an initial product line of Ultra High Efficiency Halbach Motors (UHEHM1™ series) that includes motors sized for 2-10 kW with the ability to scale to 100+ kW of continuous power operation, with smaller and larger models available upon request.
Figure 1: Halbach Array Alignment of Permanent Magnet
Figure 2: The Flux Diagram of a Halbach Array
Figure 3: Top Flight 10 kW Halbach UHEHM1 Motor
- Ironless Core with Low Inductance (No Back Iron or Lamination Required)
- Improved & Low Inertia of the Rotor
- High Specific Power in Continuous Operation
- Improved Thermal Cooling with Air-Cooled Design
- Light Weight and Compact
- Quiet, Efficient Operation
- Sustained High-Speeds beyond 10,000 rpm