Motor architecture
A robust rotating-transformer-excited synchronous machine designed without fixed rotor magnets, brushes or slip rings.
Technology platform
Virtual magnets created through motor physics, power electronics and code
VMSM is a software-defined synchronous motor architecture built to deliver permanent-magnet-class performance without permanent magnets.
The architectural shift
From fixed magnetic material to actively controlled magnetic fields
A conventional Permanent Magnet Synchronous Motor uses rare-earth magnets embedded in its rotor. Those magnets define the available field and remain fixed throughout the motor’s life.
VMSM creates the rotor field electrically and manages it with proprietary controls. Field behaviour can therefore be adjusted in real time to suit speed, torque, load and thermal conditions.
Integrated technology stack
Four layers designed as one motion system
The commercial value is not in one component. It comes from the coordinated design of the electromagnetic machine, excitation system, controller and application software.
Contactless excitation
Energy is transferred to create the rotor field while preserving a sealed, low-wear rotating system.
Power electronics
Custom electronics regulate excitation and stator operation as a coordinated high-efficiency drive.
Control algorithms
Proprietary software manages the magnetic field dynamically across the operating envelope.
System optimisation
Controls respond to duty cycle, thermal state and performance targets rather than relying on fixed material properties.
Application integration
Motor, controller and software are calibrated for the vehicle, machine or platform in which they operate.
Technology comparison
VMSM compared with a conventional PMSM
Final values depend on application, power level and duty cycle. The table describes the architectural distinction.
| Design dimension | Vimag VMSM | Conventional PMSM |
|---|---|---|
| Rotor magnetic field | Actively generated and controlled | Fixed permanent magnets |
| Rare-earth magnet content | None | Typically required |
| Field adaptability | Real-time software control | Limited by fixed magnet properties |
| Rotor electrical contact | Brushless and slip-ring-free | Not required |
| Supply-chain exposure | Reduced rare-earth dependency | Exposed to magnet availability and pricing |
| Product evolution | Controls can be calibrated through software | Major field changes generally require hardware redesign |
Intellectual property
Protection across architecture, controls and implementation
The granted patent “A Robust Rotating Transformer Excited Synchronous Motor and Its Control” covers the foundational VMSM architecture.
5
Patents granted
10
In the pipeline
15
Trademarks filed
4
Core IP domains
IP spans motor architecture, software controls, power electronics and application-specific implementations.
Technical questions
Frequently asked questions
No. VMSM is a synchronous motor architecture. Its rotor magnetic field is electrically generated and actively controlled rather than produced by permanent magnets.
The patented architecture is described as brushless and slip-ring-free, supporting a robust rotating system without conventional rotor electrical contacts.
Yes. Proprietary controls create and manage the magnetic field in real time, making software a core part of motor behaviour and performance calibration.
The platform roadmap covers mobility, industrial systems in the 200–600 kW range, robotics, defence and cooling systems.
Evaluate VMSM against your duty cycle.
Share speed, torque, power, packaging and thermal requirements with the engineering team.