Dynamic Prime Mover Management for Enhanced Energy Efficiency in Electric Tractors

Conventional ICE (internal Combustion Engine) tractors have single mechanical drivetrain used for propulsion of wheels, hydraulic and PTO drive and are designed to deliver power across range of operational zones leading to power wastage, reducing efficiency. This happens during Low Power Mode or low load operation. Extensive validation in Mahindra tractors reveal that such operations contribute to overall loss of 18–20%. Out of all factors, losses due to hydraulics is predominant and is close to 7–10 % of total power loss. In contrast, Hybrid tractors with Engine for propulsion of wheels alone and a dedicated Electric motor for PTO, Hydraulic functions. We have designed the system to offer enhanced operational flexibility through three distinct modes: Low Power Mode, Lift Assist Mode, and Implement Drive Mode. These modes ensure delivery of optimised performance while reducing the hydraulic losses & increased efficiency of the overall system.

• Low Power mode - powers essential vehicle hydraulics—such as steering and braking—during Low Power Mode periods, ensuring smooth and safe operation.
• Lift Assist Mode - delivers sufficient torque and hydraulic support for loader tasks, including lifting and lowering operations.
• Implement Drive Mode -provides precise speed control for implement-driven tasks, enhancing the performance of various attachments.

This hybrid architecture uses the benefits of ICE systems with the numerous possibilities offered by electric components & helps in creating a versatile solution to bridge the gap between Customer expectations of higher efficiency from traditional system and advanced features possible in Electric System.