125/250kW Central E-axle for Electric Tractors - China Suppliers & Factory Quality Performance
- Torque assist can realize power without interrupting gear shifting;
- It can realize heavy-load ramp-up shifting and improve operational efficiency;
- Optimize the control strategy and improve driving comfort;
- The total power of the system is up to 440KW;
- The maximum climbing degree of the 49T tractor is more than 35%;
- The maximum speed can reach 125km/h;
- The use of 300,000 kilometers of long-lasting oil, the use of maintenance-free bearings at the end of the wheel, lower maintenance costs;
- The assembly has high efficiency, low power consumption and lower operating costs;
- The service life of system B10 can reach 1 million kilometers, which is more worry-free to use;
Pumbaa PMEA40000Z Central E-axle (rear/Mid-axle) Matching vehicle type: tractor
| Rated axle load(kg) | 13000 |
| Axle housing forming method | Stamping and welding |
| Housing cross-section(mm) | 135×150×16 |
| Gearbox ratio | 13.203/4.367 |
| Wheel ratio | 3.947 |
| Nominated/peak output torque(Nm) | 320/820 |
| Rated/peak power(kw) | 125/250 |
| Maximum speed(rpm) | 11000 |
| Motor dimensions（mm） | Φ354×270 |
| Leaf spring mounting distance(mm) | 1040 |
| Rim mounting distance(mm) | 1875 |
| Overall width(mm) | 2420 |
| Brake specifications | Drum pose/φ410×220 |
| Air chamber size/connection size(mm) | 30/24 M16×1.5 |
| Maximum braking torque(0.8MPa) | 2×18000Nm |
| Wheel bolt specifications | 2-10×M22×1.5 |
| Wheel bolts are distributed in a circle diameter(mm) | Φ335 |
| Locate the stop(mm) | Φ280.8 |
| Assembly weight(kg) | 1030 |
Small batches are used in Sany Heavy Truck, Baidu Commercial Vehicle (Deepway), Foton Daimler, Zero One Smart Card, etc.
Central e-axle test:
The electric drive axle (eAxle), the "power hub" of electric vehicles (EVs), is undergoing a technological breakthrough from "decentralized components" to "highly integrated systems." This paper analyzes its technical challenges, breakthrough paths, and future trends, revealing how it drives EVs toward "greater efficiency and smarter intelligence."
Global EV penetration exceeded 18% in 2024, with the electric drive axle (eAxle) emerging as the "power heart" whose technological advancements directly impact range, performance, and safety—key drivers of industrial upgrading.
Traditional eAxles use a "motor + inverter + reducer" decentralized layout, facing:
- Large size: Accounting for 15%-20% of vehicle weight (early solutions);
- High cost: Independent component procurement + assembly, costing over 30% of total;
- Low efficiency: Energy loss up to 15% (copper + magnetic losses).
3.1 High Integration: Reducing Size and Cost
Through "integrated die-casting + modular design," eAxles now integrate motors, inverters, and reducers into a single housing (e.g., Huawei DriveONE, Tesla eAxle), reducing volume by 40% and cost by 25% (e.g., XPeng G6 eAxle).
3.2 Wide-Bandgap Devices: Efficiency Surpassing 97%
SiC/GaN replaces silicon-based IGBTs, cutting conduction losses by 50% and increasing switching frequency 10x (e.g., Porsche Taycan eAxle), achieving 97% system efficiency and extending range by 10%.
3.3 800V High-Voltage Adaptation: Balancing Ultra-Fast Charging and Performance
Supporting 800V high-voltage platforms (e.g., XPeng G9, Porsche Taycan), eAxles match 250kW ultra-fast chargers, enabling 300km range top-up in 10 minutes, while reducing current ripple (<2%)
3.4 Intelligent Synergy: Deep Integration with Autonomous Driving
Equipped with sensors (current/temperature/position) and communication modules (CAN/Ethernet), eAxles receive autonomous driving commands (e.g., "accelerate to 80km/h in 2 seconds") and pre-adjust torque output (e.g., Tesla FSD eAxle) with <10ms latency.
By 2027, mainstream eAxles will:
- Achieve power density exceeding 6000W/kg (current 4000W/kg);
- Integrate V2G (vehicle-to-grid) functionality for grid balancing (e.g., Germany’s V2G pilot);
- Adopt AI for intelligent control (e.g., predictive energy management via NPU).
Breakthroughs in electric drive axles are driving EVs from "mechanical propulsion" to "intelligent energy nodes." With future advancements in integration, wide-bandgap devices, and AI, eAxles will emerge as the core hub for "power + energy storage + intelligence," supporting global carbon neutrality goals.
The control strategy offers torque assist to realize power without interrupting gear shifts, supports heavy-load ramp-up shifting to improve operational efficiency, and optimizes overall driving comfort.
It matches tractors and is used in small batches by major commercial vehicle brands including Sany Heavy Truck, Baidu Commercial Vehicle (Deepway), Foton Daimler, and Zero One Smart Card.
The rated axle load is 13,000 kg and the gearbox ratio is 13.203/4.367.
It utilizes 300,000 kilometers of long-lasting oil and maintenance-free wheel-end bearings to lower maintenance costs. Additionally, high assembly efficiency, low power consumption, and a B10 service life of 1 million kilometers significantly reduce operating costs.
The e-axle undergoes a series of rigorous tests including noise tests of the electric bridge bench, durability tests of the electric drive bridge bench, assembly air tightness tests, vibration tests, road testing of the whole vehicle, and customer loading tests.
Supporting 800V high-voltage platforms allows eAxles to match 250kW ultra-fast chargers, enabling a 300km range top-up in just 10 minutes while reducing current ripple to less than 2%.