The Electric Revolution in Construction: Bobcat’s T7X Compact Track Loader
(All images courtesy of Bobcat)
Introduction
Doosan Bobcat is utilizing electrification to reduce emissions in construction and transform the operation of compact track loaders, as reported by Will Gray.
Traditionally, the construction industry has not been seen as a leader in sustainability, mainly due to its reliance on heavy, diesel-powered machinery. However, Bobcat has challenged this perception with its innovative T7X compact track loader, which not only minimizes emissions but also outperforms its diesel counterparts in numerous ways.
The Vision Behind the T7X
Bobcat initiated the development of the T7X in 2018, coinciding with a global shift toward electrification in various transport sectors. The compact track loader market presented a significant opportunity for innovation, as these machines are among the most commonly used in compact construction. Joel Honeyman, the vice president of global innovation at Bobcat, noted the rising demand from customers for less polluting, quieter machines, which prompted the company to explore electrified solutions.
Rather than merely replacing the diesel engine with a battery, Bobcat took a holistic approach by redesigning the loader’s entire hydraulic system, resulting in a revolutionary all-electric machine. John Pfaff, the director of innovation engineering at Bobcat, likened the T7X to a robotic system, managed by sophisticated software that optimizes power and performance.
Total Electrification
Compact track loaders are akin to Swiss Army knives of construction, capable of performing a wide range of tasks with various attachments. The transition to an all-electric platform allowed Bobcat to rethink the possibilities of machine performance. Extensive research revealed that traditional hydraulic systems, while reliable, had inherent limitations. By adopting electric ball-screw actuation, the T7X can achieve greater efficiency and versatility in its operations.
The T7X utilizes six motors to power the machine, providing robust performance even under hefty loads. Each of these motors has its own controller, orchestrated by a master computer that ensures synchronized power delivery across all functions.
Powertrain Development
Central to the T7X’s development was the selection of appropriate technology. Initially building on a 400V system due to its availability and proven reliability, the team ensured the system could support future upgrades to higher voltages. The chosen lithium-ion battery, boasting a capacity of 72.6 kWh, was designed to deliver ample power for operations while significantly reducing operational costs when compared to diesel machines.
The machine’s electricity consumption patterns revealed interesting facts about typical usage. For instance, conventional construction machines often run on idle for substantial portions of the day, burning fuel unnecessarily. In contrast, the the T7X can optimize energy consumption by eliminating idling, effectively extending the operational time between charges.
Reducing Components and Complexity
The shift from diesel hydraulic systems to electric ones led to a significant reduction in components and fluid requirements. With the T7X, Bobcat claims a reduction of up to 50% in total parts, along with vastly simplified maintenance concerns, resulting in lower operational downtime. The use of electric drives also mitigates issues related to leaks and cooling systems that are prevalent in diesel machines.
Operational Performance and Software Innovations
The first encounters of operators with the T7X have demonstrated remarkable performance improvements. Unlike diesel machines, which require optimal RPMs to achieve maximum torque, the T7X provides full torque availability at any speed due to its electric nature, improving overall productivity. Advanced software enables the machine to manage power allocation intelligently and perform multiple tasks simultaneously without a drop in performance.
Key innovations such as customizable "work modes" allow operators to adjust power levels according to specific job requirements, thereby enhancing efficiency while preserving battery life. Furthermore, ambitious features such as “Beast Mode” can give temporary boosts in power for challenging tasks without risking damage to the machine.
Enhanced User Experience
The T7X is designed with user comfort and a quiet operating environment in mind. The machine offers a significant reduction in noise and vibration, improving overall operability on urban worksites or locations where noise is a concern. The seamless controls and similar cab layout to its diesel counterparts ensure an intuitive experience for operators transitioning to this electric platform.
Future Prospects
Bobcat’s T7X stands at the forefront of electrification in construction, leading the way for future innovations. Honeyman has indicated the company’s commitment to listening to customer feedback and adapting future models based on evolving needs. Building on the success of the T7X, Bobcat has already created electric versions of other machines, signaling a robust future for electrification in construction.
The ultimate vision is not only to enhance the operational efficiency of electric machinery but also to explore ways to leverage lessons learned from this transition to improve diesel counterparts.
Specifications of the Bobcat T7X
Length (without attachment): 117.6 in
Width: 78 in
Height: 81.5 in
Operating Weight: 12,590 lb
Motor: Permanent magnet (brushless)
Power: 100 bhp
Battery: 72.6 kWh lithium-ion battery
Charging Time: 12-hour charge time with 240 V, 40 A outlet
Suspension: Solid-mounted undercarriage
Conclusion
The Bobcat T7X compact track loader represents a significant leap toward sustainability in the construction industry. As firms increasingly recognize the viability of electric machinery, solutions like the T7X pave the way for a brighter, cleaner future in construction, showcasing the potential of electrification to reshape an industry long associated with fossil fuels. With its innovative technological advancements, Bobcat demonstrates that electric does not mean compromising on power or performance. The T7X’s success heralds a new era in construction machinery.
