Tsuyo Manufacturing EV Motor Patents SynRM PMSM Innovation India

Tsuyo Manufacturing has secured two patents for electric vehicle motor technologies, marking a notable advancement in its effort to build a domestic intellectual property portfolio. These innovations focus on improving efficiency, reliability, and reducing dependency on imported materials. The development aligns with broader industry efforts to localize EV technology, particularly in a landscape historically dominated by manufacturers from China, Japan, and Europe. By focusing on foundational motor designs rather than incremental upgrades, the company positions itself as a technology originator within India’s growing electric mobility ecosystem.

Non-Magnetic Bridge SynRM Design Enhances Efficiency

The first patented innovation introduces a non-magnetic bridge architecture within synchronous reluctance motors (SynRM). Traditional SynRM designs rely on physical bridges in the rotor to maintain structural integrity, but these bridges allow magnetic flux leakage, reducing overall efficiency. Tsuyo’s approach replaces these bridges with non-magnetic materials, significantly minimizing flux leakage. This design improves torque density while maintaining rotor strength, offering a more efficient motor solution without compromising durability or performance.

An additional advantage of this architecture is its reduced reliance on rare-earth materials such as neodymium, which are commonly used in permanent magnet motors. With global supply chains for rare-earth elements experiencing volatility due to geopolitical and production concentration factors, reducing dependency on these materials becomes commercially valuable. This innovation enables manufacturers to manage procurement risks while maintaining performance standards in electric powertrains.

Five-Phase PMSM with Dual Inverter for Fault Tolerance

The second patent focuses on a five-phase permanent magnet synchronous motor (PMSM) integrated with a dual inverter system. Unlike conventional three-phase motors, a five-phase configuration distributes electrical load across more phases, which reduces torque ripple and enhances smooth operation. Lower torque ripple directly contributes to reduced vibration and noise, improving overall vehicle performance and user experience.

This motor incorporates an open-end winding design, allowing both ends of each winding to be independently controlled by the dual inverter. The system can dynamically switch between star mode for efficiency at low loads and delta mode for higher torque demands. A critical feature is its fault-tolerant capability, where the motor continues operating even if one phase fails. This ensures operational continuity in applications such as commercial vehicles, agricultural machinery, and off-road equipment, where unexpected downtime can have significant consequences.

Industry Collaboration and R&D Approach

The patented technologies were developed in collaboration with researchers from Visvesvaraya National Institute of Technology (VNIT), Nagpur. This partnership reflects a broader model of industry-academia collaboration aimed at accelerating innovation and translating research into practical applications. The company also engages with IITs and international institutions to expand its research capabilities, enabling the development of scalable and modular motor designs adaptable across multiple vehicle categories.

Leadership at the company emphasizes a design-centric approach to engineering, focusing on building core technologies rather than assembling existing components. This philosophy supports long-term innovation and strengthens the company’s position in both domestic and global EV markets. By combining in-house R&D with academic expertise, the company aims to deliver solutions that are manufacturable at scale while maintaining flexibility for diverse applications.

Manufacturing Footprint and Market Presence

Headquartered in Greater Noida, the company operates two manufacturing facilities and has deployed over 300,000 powertrains. It supplies more than 25 OEMs across sectors including commercial vehicles, agricultural equipment, and industrial machinery. Its motor portfolio ranges from 0.5 kW to 400 kW, covering multiple vehicle segments such as L3, L5, and light to heavy commercial vehicles.

The company reports sales of over 200,000 motors and collaborations with more than 50 OEMs in recent years. It holds certifications including ISO 9001, ISO 14001, and IATF, supporting its manufacturing quality standards. Expansion plans include increased production capacity backed by government approvals, aligning with national initiatives aimed at strengthening domestic EV component manufacturing and reducing import dependence.

India EV Market Context and Strategic Importance of IP

India’s electric vehicle market has witnessed steady growth driven by policy frameworks such as FAME subsidies and production-linked incentives for advanced battery technologies. Adoption has been particularly strong in two- and three-wheelers, while commercial and passenger vehicles continue to expand gradually. Despite this progress, a significant portion of core EV technologies, including motors and controllers, remains imported or licensed from foreign manufacturers.

In this context, intellectual property development becomes a critical differentiator for domestic companies. By focusing on original motor topologies and system-level innovations, companies aim to strengthen their competitive position and reduce reliance on external technology sources. The long-term impact of such patents will depend on their adoption across industries and their ability to translate into scalable manufacturing, licensing opportunities, and export competitiveness.

Frequently Asked Questions

What makes Tsuyo Manufacturing’s EV motor patents unique?
Tsuyo Manufacturing’s EV motor patents introduce innovative designs that improve efficiency, reliability, and reduce reliance on rare-earth materials. The non-magnetic bridge SynRM reduces flux leakage and enhances torque density, while the five-phase PMSM with dual inverter improves fault tolerance and operational continuity. These advancements target real-world challenges in EV performance and supply chain stability. Together, they represent foundational improvements rather than incremental upgrades, positioning the company as a technology innovator in electric powertrain development.

How does the five-phase PMSM improve vehicle performance?
The five-phase PMSM improves vehicle performance by distributing electrical load across more phases, reducing torque ripple and enhancing smoothness. Its dual inverter system enables flexible operation through star and delta modes, optimizing efficiency and torque output. Additionally, its fault-tolerant design ensures continued operation even if one phase fails. This makes it particularly suitable for commercial and heavy-duty applications where reliability is critical, helping reduce downtime and maintain operational efficiency under demanding conditions.