The company’s patented EV motor technologies reflect a broader push toward Design-in-India solutions for domestic and global electric vehicle markets.
Electric powertrain company Tsuyo Manufacturing announced that it has secured two patents for electric vehicle (EV) motor technologies. The development strengthens the company’s push to build indigenous intellectual property in a sector largely led by overseas manufacturers.
The patents cover two new motor architectures — a non-magnetic bridge assisted synchronous reluctance motor (SynRM) and a fault-tolerant five-phase interior permanent magnet motor paired with a dual inverter control system. Both designs aim to improve efficiency, reliability, and cost optimisation in EV powertrains.
The first patent focuses on improving synchronous reluctance motors. Traditional rotor designs use magnetic bridges that allow flux leakage, reducing efficiency. Tsuyo’s approach replaces these bridges with non-magnetic material, lowering energy losses while improving torque density and rotor strength. The design also reduces dependence on rare-earth materials such as neodymium, helping address supply risks and cost volatility.
The second patent introduces a five-phase permanent magnet synchronous motor, moving beyond the standard three-phase configuration used in most EVs. Distributing power across five phases reduces vibration and enhances operational stability.
An open-end winding design enables independent inverter control, allowing the motor to switch between efficiency-focused startup operation and high-torque performance when required. The system is engineered to continue operating even if one phase fails, making it suitable for commercial vehicles, agricultural equipment, and heavy-duty applications.
Founder and CEO Vijay Kumar said the patents align with the company’s “Design-in-India” vision to develop scalable technologies for domestic and global EV markets. The innovations were developed in collaboration with researchers from Visvesvaraya National Institute of Technology, reflecting growing industry-academia partnerships in India’s electric mobility ecosystem.
The announcement comes as India accelerates localisation efforts to reduce dependence on imported EV components and strengthen domestic technology development.
