Context: Virtual Magnet Technology for EVs
A Bengaluru-based startup, Vaying Labs, has claimed to develop a virtual magnet technology that can replace rare-earth permanent magnets in EV motors with software-controlled electromagnets.
The idea is to reduce dependence on rare-earth minerals while trying to maintain motor performance. This is important because EV motors currently depend heavily on rare-earth permanent magnets for efficiency, torque and range.
What Is a Virtual Magnet?
A virtual magnet is not a physical magnet.
It is a magnetic field created through software-controlled electromagnets.
In this system, software controls the electric current passing through copper coils.
This allows the coils to behave like a permanent magnet inside the motor.
Why It Matters for EVs
Electric vehicle motors commonly use rare-earth permanent magnets.
These magnets are important because they provide strong magnetic fields without continuous electricity use.
This helps EVs achieve:
- Higher efficiency
- Better torque
- Longer driving range
- Better motor performance
But the problem is that rare-earth minerals are concentrated in limited global supply chains.
So virtual magnet technology may help reduce dependence on critical minerals.
Why Permanent Magnets Are Still Preferred
Permanent magnets remain dominant in EV motors because they do not need continuous electricity to generate magnetic fields.
This makes them more energy efficient than electromagnets.
They also offer better performance in compact motor designs.
Limitation of Virtual Magnets
Electromagnets need continuous electricity.
This creates energy losses.
So even though virtual magnet technology can reduce rare-earth dependence, it has not yet fully matched the efficiency of permanent-magnet EV motors.
Rare Earth Elements
Rare Earth Elements are a group of 17 metallic elements.
They include:
- 15 lanthanides
- Scandium
- Yttrium
They are not actually rare in the Earth’s crust, but economically viable deposits are limited.
Uses of Rare Earth Elements
Rare earths are used in:
- EV motors
- Wind turbines
- Electronics
- Defence systems
- Permanent magnets
- Robotics
- Space technology
Important rare earths used in EV motors include:
- Neodymium
- Praseodymium
- Dysprosium
Key Takeaway
Virtual magnets may reduce EV dependence on rare-earth minerals, but permanent magnets still dominate because of their superior efficiency, torque and range.
