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Cooling Breakthroughs that unlocks the potential of every motor

More Continuous power

MOTORS

Smaller &
Lighter

Coolshaft™

Less Rare Earth 
Magnets

Reinvent the Motor

Cheaper

Reinvent the Motor

Unlock more 
continuous power while reducing cost

Less Embodied Emission

commonised parts

  • Super Compact
  • Superior thermal heat removal
  • Scalable manufacturing

Land, Air or Sea Cool Them All.

  • Super Compact
  • Enhanced Efficiency
  • More Range
  • Air Taxi and Drones
  • Electrified Marine Engines
  • Conventional Electric Vehicles
  • Applicable to all traction and propulsion motors
  • Adjustable to any cooling inputs
  • Scalable manufacturing

The Cooling Trident The Future of Every Electric Motor

Unlocking the Hidden Potential of Electric Motors without clean sheet design

Electric motors drive the future of mobility, but they are fundamentally constrained by heat buildup, which is the thermodynamic cost and size barrier.


Build up heat is often the fundamental bottle neck that controls the size and cost of conventional motors (95% of motors).  Hence efficient cooling is the key to enhance motors continuous power density.

We have invented the cooling trident: CoolShaft™, CoolDisc™ and CoolCap™ a breakthrough next-gen rotor and stator water-based cooling system that removes this bottleneck. It is designed to integrate seamlessly into existing electric motor architectures, enable 70+% more continuous power, which convert to smaller and lighter motors, & unlocks the adoption of magnetless motor topologies. These technologies are a plug and play without the need for a clean-sheet redesign.

  • The Thermal Bottleneck

Why Motors Are Bigger &
More Expensive Than They
Need to Be

Electric machines have come a long way in terms of efficiency and compactness, but one challenge persists is cooling.



Today’s motors are sized not by their electromagnetic performance; their sizing depends on their inability to dissipate heat. This leads to oversized motors, excessive use of rare-earth magnets, and limited efficiency under real-world driving conditions. These issues persist at various degrees in all motor topologies.

Motor market & technology application

Heating limits continuous power. Continuous power is the most important aspect of a motor’s performance. That is why established, leading motor manufacturers quote the performance of their motors using continuous power.

Why Continuous Power Matters

Continuous power is the real measure of a motor’s capability. It defines how much power a motor can deliver over time, during sustained highway driving and freight hauling.

Unlike peak power, which lasts seconds,

continuous power defines the motor’s true utility in real-world conditions.
 

This is why motors today are oversized, overbuilt, and over-dependent on expensive rare-earth magnets. It is not because they need more performance, but because of their internal generated heat and its dissipation. 

At Magnetless, we focused on the real problem, how to unlock continuous power by efficiently cooling the motor.
 

Delivering more continuous power requires the removal of the heat build-up, and today’s cooling strategies aren’t up to the task.  

Here at Magnetless, we believe the future isn’t about chasing attention-grabbing peak power figures it’s about delivering reliable, repeatable, high-performance continuous power. 

That’s why we built the trident cooling system, CoolShaft™, CoolDisc™ and CoolCap™, that enable smaller, more efficient, and more sustainable motors. 

Why Other Cooling Methods Fall Short

  • 1. Stator Cooling

Traditional Approach

This is the most common thermal management method which wraps the stator in a liquid-cooled jacket. Mmost all motors use this method which works well to cool the stator.

Pros: 

  • Low cost, easy to make and assemble
  • Use the car’s existing coolant circuit (Water-glycol mix)
  • Stator temperatures stay within safe limits (typically Class H, 170°C max). 
  • Sufficient for low power density motors.
  • It removes heat from the winding and stator core.

Cons: 

  • It is not sufficiently close to the winding (heat source).
  • Insufficient heat removal for power density required for modern EVs.
  • Has negligible cooling effect on the rotor.
  • 2. Rotor Cooling with Oil/ATF

A costly solution

Automatic Transmission Fluid (ATF) oil is used in some modern motors. The dielectric nature of the ATF allows a safe direct contact with the electric parts. Hence, using ATF to cool the motor through passing it over the stator surface, spray or dripping over the end-winding, and through the rotor shaft or rotor channels.

Pros:

  • ATF in direct contact with the winding and rotor, hence good heat removal.
  • ATF is a dielectric fluid, hence leakage does not pose operational issues.
  • Oil from the gearbox can easily be accessed in eAxles systems.

Cons:

  • Requires secondary ATF circuit which adds weight, size and cost.
  • Oil is viscous (20x water), meaning significant pressure drop, hence requiring large pumps and more pumping power that could go to the wheels.
  • Oil in the rotor causes friction (parasitic losses)
  • ATF is a poor heat transfer medium (250% less efficient than water), hence requiring high circulation rates, resulting in high pressure drop and power consumption.
  • Oil is hygroscopic (absorbs water) with reports of catastrophic corrosion failure. Specialist low hygroscopic oils are expensive.
  • 3. The Superior Alternative

Water-Based Cooling

Water is the cheapest, most efficient heat transfer medium. All vehicles come with a standard Water-ethylene glycol (WEG) cooling circuit; hence a single water-based cooling system is the most convenient and desirable approach for OEMs. A combined stator and rotor water cooling system CoolShaft and CoolDisc offer a superior alternative to ATF cooling.

Pros:

  • Best heat transfer system – cost vs efficiency.
  • Achieve direct contact with the heat source using CoolShaftTM & CoolDiscTM
  • Plug and play to the EV cooling circuit
  • No need for secondary cooling circuit, hence reducing the system weight, cost, efficiency and complexity.
  • Direct heat transfer from rotor and winding without the need for complex channels.
  • Applicable to most motors without the need for clean-sheet design.
  • Independent module, easing maintenance where high performance is required (defence).

Cons:

  • Requires integration into the motor assembly process

Trident Cooling - Water Cooling of Motors

CoolShaft™ is the first complete water-based rotor cooling system that’s leak-proof, automotive-grade, scalable and production-ready. Consists of an advanced multi-layer sealing, leak-proof under continuous high-speed rotation, aerospace-grade CFD-optimised flow paths for maximum cooling with minimal pressure loss, cross-industry expertise from oil & gas, aerospace, & automotive.  

Combined with the CoolDisc™ and CoolCap™, our next-gen water stator cooling system that brings the state-of-the-art water-cooling technology form the data centres to the hart of the electric motor,  

They work independently or together to eliminate the need for oil cooling. 

  • Proprietary SIL 4 level sealing system proven under high speed, thermal cycling, & contamination
  • Minimal mechanical losses, ensuring efficient operation
  • Optimised flow paths for maximum heat transfer and pressure control
  • No redesign required, drop-in compatible with existing motors

Removing rotor heat is the heart of the continuous power limitation. With CoolShaft™, CoolDisc™ and CoolCap™, you can have: 

  • More
Continuous Power Output
  • Reduction IN
RELIANCE ON
RARE-EARTH 
MAGNETS
  • Smaller
lighter 
motors
  • CHEAPER MOTORS
ENABLES MAGENTLESS
MOTOR

CoolShaft™ doesn’t just cool better. It solves the single biggest limitation in every electric vehicle motor today.

CoolDisc™ obliterates the need for de-rating . Together it eliminates the need for complex, expensive oil cooling while exceeding the performance of any current motor cooling technology

Measurable Gains, 
Maximum Impact

We have tested the Trident Cooling design with 20+ motor designs that are currently in vehicles in the market using industry standard multi-physics simulations with the following results: 

  • Feature
  • +70% Continuous Power
  • -50% Motor Size & Weight
  • -50% Rare Earth Magnet Use
  • -50% Embodied Emission
  • 98% System Efficiency
  • Plug & Play
  • Performance Benefit
  • More power at no extra cost
  • Smaller envelope without thermal sacrifice
  • Lower cost, improved sustainability
  • Reduced Scope 3 emission
  • More usable power, more range
  • No clean-sheet redesign required

A real Transformation 50% Smaller Motors Vehicle 
level transformation

Trident Cooling can reduce the cost of electric vehicles by up to 10%. It can also improve the overall performance of the vehicles.

  • Reducing size and weight doesn’t just shrink the drivetrain, 
it sets off a chain reaction of efficiency across the entire vehicle.
  • Up to 10% more range from reduced mass & improved power density

  • Smaller battery packs become viable without sacrificing performance
  • Lighter vehicles require lighter/smaller brakes, reducing unsprung mass
  • Associated systems can be downsized, unlocking further savings in cost, 
weight, & complexity

This is how a 50% smaller motor translates into a vehicle-level transformation — one that improves performance, efficiency, and manufacturing flexibility all at once. Trident Cooling makes this possible by unlocking thermal headroom and eliminating the need to over-engineer motor volume for heat.

Why Motor Volume Reduction Is a Platform Gamechanger

  • Shrinking the motor size doesn’t just mean direct cost reduction, it directly improves range, battery needs

A Key Enabler for Magnetless Motors

  • Electric motors heat bottlenecks are the rotor weather in magnet motors or magnetless motors (Induction or wound rotor) and the stator in central winding and/or end-winding. With the cooling trident, motors can:
  • Run cooler and more efficiently
  • Handle higher rotor power
  • Downsize
  • This opens a path to 80% cost reduction, zero rare-earth dependence, & more recyclable, sustainable drive units. Magnetless motors have ~50% less scope 3 embodied emission than the current permanent magnet machines.

Built to Scale. Built for Now. 
Engineered for the future.

The Trident Cooling is designed for fast adoption and global deployment.

Modular Design – Rapid Scaling

80%+ parts are common across different motor products

Plug-&-Play

Integrates into 95% of existing & future motor architectures

Manufacturing-Ready

No need for retooling. Compatible with standard casting and machining

 Beyond Passenger: Cross-Sector Applications

The Trident Cooling design goes beyond traction motors in passenger electric vehicles. It can be used for vehicles as well as industrial applications.

Conventional Electric Vehicles

Reduced costs, increased performance, smaller, lighter motors

Hybrid Vehicles

Enables motor downsizing to fit existing engine bay constraints – hybrid without platform redesign

Performance Vehicles

50% more power using the same motor

Air Taxis & eVTOL Drones

Reduce the wight and Size of Motors from air taxis and large drone – dual application

Heavy Duty Vehicles

More power or downsized motor for lower cost and more payload capacity

Electrified Marine Engines

Liquid cooled motors for maximum performance, compactness and reduced costs.

Wind Turbines

More compact, higher efficiency, cheaper generators using the CoolShaft™ technology.

Scalable Technology - Accessible To All - Unified BOM Architecture

Our cooling technologies unlock:


& a clear path toward next-generation, magnet-free electric motors

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