In the construction machinery industry, the electrification transformation of cement mixer trucks is a crucial step towards sustainable development. RAWSUNS, with its forward – looking technology and innovative concepts, has developed an electric cement mixer truck system that leads the industry in energy conservation, emission reduction, and intelligent operation.
1. Background and Significance
Against the backdrop of global efforts for energy conservation, emission reduction, and environmental protection, traditional fuel – powered cement mixer trucks face challenges due to high emissions and low efficiency. RAWSUNS’ electric cement mixer truck system emerges as a game – changer.
Energy – saving and emission – reduction are at the core of its advantages. Exhaust gas zero – emission is a significant breakthrough. A traditional fuel mixer truck’s emissions are equivalent to the sum of 70 family cars’ emissions. In contrast, each battery – electric mixer truck can save about 24,800 liters of fuel annually, reduce PM emissions by 8.04 kg, NOx emissions by 386 kg, and CO₂ emissions by 66.3 tons. This emission – reduction effect is equivalent to planting 4.97 acres of broad – leaved forest, making a substantial contribution to improving air quality and combating climate change.
Moreover, local government policies promoting battery – electric vehicles for urban transport, including cement mixers, have created a favorable environment for the application of RAWSUNS’ system. Additionally, compared with products that use electric motors to drive hydraulic pumps and motors (which have disadvantages like large hydraulic losses, low efficiency, and high maintenance requirements), RAWSUNS’ electric motor direct – drive products overcome these issues, ensuring higher efficiency and lower operating costs. As the development of pure – electric mixers trends towards intelligent networking, a more intelligent tank operating system is required, and RAWSUNS’ system is well – positioned to meet this demand.
2. System Composition and Highlights
Chassis and Top – part Drive
The chassis and top parts of RAWSUNS’ electric cement mixer truck are motor – driven. This design simplifies the power transmission process and improves energy utilization efficiency.
Emergency Drive System
A key highlight is the configuration of a 24V emergency drive system. The emergency motor has a rated power of 3.1 kw, a rated torque of 12 Nm, a rated speed of 3000 r/min, and a rated voltage (VDC) of 24. This ensures that in case of abnormal high – voltage situations of the whole vehicle or abnormal drive motor conditions, the system can switch to the emergency motor working mode. For example, if the upper controller detects abnormal input voltage of the distribution box (abnormal high – voltage of the whole vehicle) or abnormalities in the distribution box, drive motor controller, and drive motor, it will report faults, cut off the main relay, stop supplying power to the drive motor controller, switch to the emergency motor mode, send an enable signal to the emergency motor controller, and cut off power to other irrelevant low – voltage devices. The emergency motor can then respond to the joystick commands, guaranteeing the basic operation of the mixer truck and enhancing operational safety.
Zero – Emission Realization
By using electric power as the energy source, the system achieves zero – emission during operation, fully complying with strict environmental protection requirements and making it an ideal choice for urban construction projects. The upload drive motor has a rated power of 50 kw, a peak power of 90 kw, a rated torque of 160 Nm, a peak torque of 350 Nm, a rated speed of 3000 r/min, and a peak speed of 6000 r/min. When installing the reducer, the maximum input torque of the main drive is 30 Nm, the maximum emergency input torque is 30 Nm, and the total system length (with motor) is 929 mm.
3. Intelligent Control and Operation
Remote Control and Display
The system is equipped with a remote – control handle receiver and display. There are basic configurations on the left, and optional setups to meet different operational needs. The remote control has multiple functions, such as transport, feeding, discharging, cleaning, accelerating, decelerating, emergency, and stop. Each button corresponds to specific motor rotation commands. For instance, the “Feed” button makes the motor rotate forward at 12 rpm, the “Discharge” button at 4 rpm, and the “Cleaning” button at 16 rpm. The “Emergency” button allows the motor to rotate forward at 1 rpm, and it can reverse when the discharge button is pressed simultaneously. The “Stop” button halts the motor (speed 0 rpm).
In – vehicle and External Control Devices
Inside the vehicle, there is a separate touchscreen LCD display for real – time monitoring of various operating parameters. The upper switch cabinet, upload controller, and other components work together to ensure the accurate execution of control commands. The remote – control device provides operators with the flexibility to control the mixer truck from a distance, improving operational convenience and efficiency, especially in complex construction sites.
Control Strategy
The control strategy of the RAWSUNS electric cement mixer truck system is comprehensive. In normal high – voltage conditions of the whole vehicle, the drive motor uses the power battery and responds normally to joystick commands. In abnormal situations (abnormal high – voltage of the whole vehicle or abnormal drive motor), the system can intelligently switch to the emergency motor mode, ensuring continuous and safe operation to the greatest extent.
In conclusion, the RAWSUNS electric cement mixer truck system represents a perfect combination of environmental protection, efficiency, and intelligence. It not only meets the current needs of energy conservation and emission reduction in the construction industry but also paves the way for the future intelligent development of construction machinery. With this system, the cement mixer truck industry is taking a big step towards a greener and smarter future.
