June 2022
SIA Powertrain Energy
90%
of electric vehicles today have permanent magnet (PM) motors.
The Problem
PM motors are problematic because there’s a supply shortage of Rare Earth Elements (REE). That’s why the industry is moving toward RE-free motors.
More For Less
Dynamic Motor Drive (DMD) removes reliance on REE and gives you more efficiency at a lower cost.
When torque requests are low, DMD pulses the magnetic field at optimal efficiency. A conventional motor running continuously can’t deliver as much efficiency.
With the move to electrification, RE magnet dependence, range anxiety and battery costs are still looming issues. DMD provides an affordable software efficiency solution, free from the environmental and cost impacts of RE metals.
What Makes DMD Different
Software Solution
Scalable, transparent, and straight forward integration
Scalable, transparent, and straight forward integration
Affordable Efficiency
High efficiency solution at a lower cost than alternatives
High efficiency solution at a lower cost than alternatives
Sustainable Solution
Accelerates transition to environmentally friendly RE-free motors
Accelerates transition to environmentally friendly RE-free motors
DMD Reduces System Losses
DMD makes systems more efficient by reducing core and inverter switching losses. Results? 25% reduction in energy loss.
Software Solution Boosts EV’s Evolution
DMD is a software solution that improves Externally Excited Synchromous Motors (EESMs) and other RE-free motors. DMD software completes existing systems, making EESMs as efficient at low speeds as they are at high speeds. Now you can get efficiency without RE.
Induction
Motors
Motors
Use no magnets and are primarily secondary drives
Low Cost
Low Efficiency
Low Efficiency
IPM
Internal Permanent Magnet Machines
Internal Permanent Magnet Machines
Dominate EVs but require expensive problematic rare earth elements (REE)
High Cost
High Efficiency
High Efficiency
EESM
Externally Excited Synchronous Motors
Externally Excited Synchronous Motors
Replace REE magnets with copper reducing cost with equivalent performance
Medium Cost
High Efficiency
High Efficiency
DMD Technology in Action
Dynamometer work has proven DMD value; vehicles demonstrate on-road drivability and customer acceptance. Tula provides design consulting, R&D and IP licensing services as well.
Efficiency Gains
Our 150kW vehicle traction-motor development dyne is proving efficiency gains.
DMD Demonstrators
Dynamic waveform control eliminates perception of DMD in vehicle operation.
DMD for Industry: Transition to a Better Future
DMD also helps Industry experience a significant boost in efficiency, saving energy and accelerating the transition to a future without rare earth materials.
Line Start
Induction Motors
Induction Motors
Require no magnets and dominate the industrial market
Low Cost
Low Efficiency
Low Efficiency
Inverter Controlled
Induction Motors
Induction Motors
Meet latest IE5 regulations with power electronics
Higher Cost
Medium Efficiency
Medium Efficiency
SynRM
Synchronous Reluctance Machines
Synchronous Reluctance Machines
Low-cost and robust with better efficiency than induction motors
Low Cost
High Efficiency
High Efficiency
