VImag Labs blew my mind.
They've built what they call a Virtual Magnet Synchronous Motor (VMSM).
Traditional permanent magnet motors rely on rare earth magnets inside the rotor. These magnets are imported and expensive.
Instead of using permanent magnets, VImag's rotor contains windings that are electronically excited and precisely controlled through software. As current is induced and managed in the rotor, it behaves like a "virtual magnet" allowing the rotating magnetic field from the stator to drive the motor just like a conventional permanent magnet synchronous motor.
This means that the motor delivers the benefits of a permanent magnet design without actually needing rare earth magnets.
Their current prototype is rated for 6 kW continuous power, with a peak output of 10 kW and 48 to 58 Nm of torque. The initial target market is EVs (everything from two wheelers, three wheelers, buses, and trucks). They may also use them in compressors and ceiling fans.
The upsides are:
1. Lower cost.
2. Lower weight.
3. Smaller size.
4. Ability to control magnetic field.
5. Improved efficiency over PMSM.
6. Indigenous manufacturing and supply chain resilience.
The company has been working on this tech since 2020.
🚨 Bengaluru-based Vimag Labs has been granted a fifth patent for their magnet-free electric motor.
This is fully indigenous and uses just copper, steel and standard electronics.