In the realm of construction machinery, RAWSUNS is making waves with its innovative electric loader system. This cutting – edge solution is not only transforming the way loading operations are carried out but also contributing to a more sustainable and efficient future for the industry.
I. Product Overview
RAWSUNS offers a range of electric loader systems, such as the RSL24 – EL and RSL09 – EL models. These loaders are engineered with advanced technology to meet the diverse needs of construction projects.
A. Key Specifications
- Working Mass and Load Capacity
- The RSL24 – EL has a working mass of 18500 ± 500 kg and a rated load of 5000 kg, with a bucket capacity of 3 m³. In contrast, the RSL09 – EL comes in two variants with working masses of 5200/7200 kg, rated loads of 1600/1800 kg, and bucket capacities of 0.9/1.0 m³. These specifications allow the loaders to handle different types of materials and tasks, from heavy – duty industrial operations to more delicate loading jobs.
- Power and Performance
- Both models are equipped with Permanent Magnet Synchronous Motors (PMSM). For the RSL24 – EL, the travel motor power is 120/250 kW and the hydraulic motor power is 90/180 kW. The RSL09 – EL has a travel motor power of 60 kW and a hydraulic motor power of 30/35 kW. This powerful motor configuration ensures excellent performance, with a maximum climbing ability of ≥ 57% for both models, enabling them to operate efficiently on various terrains. The maximum driving speeds are 32 km/h for the RSL24 – EL and 26/32 km/h for the RSL09 – EL, and the maximum traction is ≥ 155 kN for the RSL24 – EL and ≥ 48/57 kN for the RSL09 – EL.
- Battery and Energy Consumption
- The loaders use Lithium – Iron Phosphate (LiFePO4) batteries, which are known for their high energy density, long cycle life, and safety. The RSL24 – EL has a rated capacity of 282 kWh and an energy consumption of 30 – 35 kWh/h, while the RSL09 – EL has a rated capacity of 141 kWh and an energy consumption of 10 – 13 kWh/h. This battery technology ensures that the loaders can operate for extended periods, reducing downtime for recharging.
II. System Features
A. Integrated Vehicle System
RAWSUNS electric loaders feature an integrated vehicle system with mature applications. The system includes a power battery, drive motor, and integrated controller. The four – in – one and five – in – one controllers developed for pure electric engineering vehicles integrate functions such as motor controller, high – voltage power distribution, DC – DC, and others. This integration makes the system safe, stable, lightweight, and easy to install. The high – efficiency zone of the motor is larger, with an efficiency increase of 1.5% and loss reduction from 4.5% to 3%, comparing round wire and flat wire motors, which contributes to better energy utilization.
B. Dual Motor Solution
The dual motor solution is a standout feature. The hydraulic system and the travel system are driven independently, decoupling the two systems. This not only simplifies the design but also enhances reliability, energy – saving, and efficiency. The travel motor is driven in a torque/speed/power compound mode, providing powerful driving force superior to that of traditional transfer machines of the same tonnage.
C. Variable Speed Control Positive Flow System
Based on pilot prediction, this system offers good controllability and low – speed performance. It supplies fluid on demand, reducing overflow loss during unloading, thus achieving energy – saving and high – efficiency operation. The hydraulic system consists of a variable frequency motor + quantitative pump, and the travel system has options like variable frequency motor + reduction box or frequency conversion motor + drive axle.
D. Multiple Drive Modes and Smooth Gear Shifting
The loaders support multiple drive modes, including motor drive reduction box and motor direct drive axle. The smooth gear shifting control allows the reduction gearbox drive mode to switch between high and low speeds without stopping. An electro – hydraulic proportional shift control system ensures smooth and impact – free operation.
E. Energy Recovery
Energy recovery is an important aspect of the system. The travel system recovers energy through braking, and the hydraulic system can also realize electrical energy recovery, further improving the vehicle’s endurance and reducing energy waste.
F. High Voltage Management and Idle Speed Control
The independently developed high – voltage management unit ensures safe high – voltage on and off operations. It includes real – time insulation resistance monitoring, collision/emergency power – off design, high – voltage interlocking, power – on instantaneous impact protection, and over – current detection, guaranteeing the driver’s property and personal safety. The automatic idle speed control strategy automatically identifies idle conditions, reducing no – load losses while maintaining rapid response performance.
G. Intelligent Thermal Management
Equipped with an intelligent thermal management system, the loaders prevent overheating of the battery, motor, electronic control, hydraulic oil, and gearbox oil. This ensures continuous operation, as demonstrated by the measured changes in hydraulic oil temperature and cooling water temperature of the prototype, which show stable temperature control during working time.
H. Intelligent Human – Machine Interface
The intelligent human – machine interface integrates the status information of each powertrain component for real – time monitoring. It enables intelligent fault diagnosis and prediction, informing the driver to take emergency measures in a timely manner. Fault codes support remote guidance for drivers and maintenance personnel, reducing use and maintenance costs.
III. Advantage Analysis
A. Professional Solutions
RAWSUNS Technology provides comprehensive R & D, design, transformation, and processing solutions for new energy engineering machinery at both the system level and key component level. As an integrated supplier of core components for new energy engineering machinery, it offers solutions for three – electric systems (electric, extended – range electric, and hybrid) of new energy loaders and excavators, including vehicle hybrid pump system, wheeled mechanical travel drive, shifting system, etc. It also caters to new energy industrial vehicles, providing solutions for high – voltage lithium battery (300 – 450V) power, steering, and travel systems for small forklifts and logistics vehicles. Additionally, as a brand of single – machine unmanned engineering machinery and industrial vehicles, it offers unmanned whole – machine system solutions for fixed occasions and typical working conditions.
B. Wide Adaptability
The technical solution of RAWSUNS electric loader systems is applicable to existing mainstream engineering machinery categories. Whether it is for large – scale construction sites or small – scale material handling operations, these loaders can be adapted to meet the requirements, providing a versatile solution for the construction industry.
C. Commitment to Innovation and Quality
With the idea of “Energy saving and emission reduction, benefiting others and ourselves”, RAWSUNS insists that technology is the primary productive force and quality is the primary responsibility. By continuously pursuing technological innovation and providing all – round comprehensive services, RAWSUNS is dedicated to promoting the development of the new energy engineering machinery industry and creating more value for customers.
In conclusion, RAWSUNS electric loader system represents a significant step forward in the construction machinery industry. With its advanced technology, comprehensive features, and commitment to sustainability and quality, it is well – positioned to meet the evolving needs of the construction sector and lead the way towards a greener and more efficient future.
