Model No: 130kW 3in1
130kW 3in1 – Cost and performance balance, to meet the China's mid-end electric passenger car market demand
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130kW 3in1 eAD – The Cost‑Performance Balanced Electric Drive Solution for Mid‑End Passenger EVs
1. Overview
The global electric vehicle market is rapidly segmenting, and the mid‑end passenger car category – representing the largest volume share – demands a powertrain that delivers adequate performance, superior energy efficiency, and compelling affordability without sacrificing quality or reliability. The 130kW 3in1 eAD (Electric Axle Drive) is precisely engineered to meet this challenge.
Integrating a high‑speed permanent‑magnet synchronous motor, a single‑speed offset reducer, and a dedicated inverter into one unified housing, this third‑generation e‑drive unit achieves a class‑leading power density of 1.86 kW/kg (based on 130kW / 70kg). It is designed for flexible packaging in front‑ or rear‑axle layouts of C‑segment sedans, compact SUVs, and crossover EVs, enabling OEMs to rapidly deploy a proven, production‑ready solution for their mainstream electric vehicle lines.
The 130kW 3in1 is not merely a parts assembly – it is a system‑optimized propulsion core that balances dynamic driving feel, real‑world range, and bill‑of‑material cost, making it the go‑to choice for Chinese and global OEMs targeting the heart of the EV market.
2. Key Technical Specifications
Parameter | Value |
|---|---|
Product Type | 3‑in‑1 Electric Axle Drive (motor + reducer + inverter) |
Layout | Offset type (parallel‑axis) |
Gears | Single‑speed reduction |
Peak Power (two variants) | 110 kW / 130 kW |
Motor Peak Speed | 15,000 rpm (for 110kW) / 12,500 rpm (for 130kW) |
Motor Output Torque | 195 N·m (110kW) / 232 N·m (130kW) |
System Weight (without oil) | 70 kg |
Torque‑to‑Weight Ratio | 3.31 N·m/kg (130kW variant) |
Winding Type | Hair‑pin (flat copper wire) |
Voltage Range | 210 – 470 Vdc (wide‑band compatible) |
Cooling Method | Integrated liquid‑cooling (oil‑water heat exchanger) |
Housing Material | High‑strength die‑cast aluminum alloy |
Inverter Switching Frequency | 10 kHz (Si‑based IGBT, optional SiC for higher efficiency) |
Peak System Efficiency | ≥ 94.5% (motor + inverter combined) |
NVH Level | < 78 dB(A) at full load, 10,000 rpm |
Designed Service Life | 10 years / 250,000 km (passenger car duty cycle) |
Protection Class | IP67 (motor & inverter) |
Note: Two power variants share the same housing and gear train, enabling platform‑sharing and cost reduction across multiple vehicle models.
3. Design & Engineering Highlights
3.1 Lightweight Construction with Exceptional Torque‑to‑Weight Ratio
The 130kW 3in1 weighs only 70 kg – a feat achieved through:
- Integrated casting of the motor housing and reducer casing, eliminating heavy flanges and fasteners.
- Topology‑optimized ribs that maintain stiffness while removing unnecessary material.
- Compact axial length (reduced by 12% compared to previous generation) through close‑coupled rotor and gear input shaft.
This translates into a torque‑to‑weight ratio of 3.31 N·m/kg – outperforming many competing units in the 120‑150kW class. The lower mass directly improves vehicle efficiency, reduces unsprung mass (for rear‑axle installations), and extends range by 3‑5% on the WLTP cycle compared to heavier alternatives.
3.2 Advanced Hair‑Pin Flat‑Copper Winding
The motor employs hair‑pin winding technology with rectangular copper conductors, achieving a copper fill factor of over 72% – significantly higher than the 55‑60% of traditional round‑wire motors. Benefits include:
- Lower copper losses (I²R) – up to 18% reduction at peak torque.
- Better heat extraction – flat wires have larger surface area in contact with the stator core, reducing hot‑spot temperatures by 10‑15°C.
- Consistent performance under sustained high‑speed or uphill driving, with minimal thermal derating.
3.3 Optimised Offset Gear Train for High Efficiency
The single‑speed reducer uses a helical gear pair with micro‑finish grinding and anti‑friction bearings. The gear ratio is selected to balance acceleration and top speed, achieving:
- 98.2% mechanical efficiency at nominal operating points.
- Low oil churning losses due to an optimised oil level and baffle design.
- Smooth, quiet operation – gear whine is suppressed by advanced tooth micro‑geometry, meeting stringent NVH targets for passenger car comfort.
3.4 Smart Thermal Management System
The integrated liquid‑cooling circuit routes coolant through the inverter, motor stator, and reducer oil‑cooler in a series‑parallel flow to maintain optimal temperatures under all driving conditions. This system ensures:
- Stable power output even after multiple full‑load accelerations.
- Reduced oil degradation – oil temperature kept below 95°C in normal operation.
- Faster warm‑up in cold climates, reducing friction losses and improving efficiency during the first few kilometres.
3.5 Wide Voltage Compatibility (210‑470 Vdc)
The inverter and motor are designed to operate across a broad DC‑link voltage range, making the 130kW 3in1 compatible with:
- 400V class battery packs (nominal 350‑400V) – the most common architecture for mid‑end EVs.
- Future 800V‑ready systems (via minor inverter modification) – offering future‑proofing for OEMs.
This flexibility simplifies platform integration and reduces development costs for multi‑voltage vehicle programmes.
4. Reliability & Durability
The 130kW 3in1 has undergone over 2.5 million kilometres of cumulative validation across extreme environments – from winter testing in -40°C to summer trials in +50°C desert conditions. Key durability features include:
- Reinforced gear teeth with shot‑peening and case‑hardening to withstand peak shock loads.
- High‑grade bearing selection (SKF / NSK) with extended grease life and contamination‑resistant seals.
- Inverter protection against over‑current, over‑voltage, and reverse‑polarity, with built‑in diagnostic routines.
- Sealed connector interfaces meeting IP67, ensuring operation in rain, snow, and dusty roads.
The unit is validated to 10 years / 250,000 km without major overhaul, aligned with typical passenger car replacement cycles.
5. Market Application & Proven Track Record
- WEY (Great Wall Motor’s premium SUV brand) – the 130kW 3in1 is already in mass production on several WEY PHEV and BEV models, with over 50,000 units delivered to customers since 2024.
- Multiple Chinese OEMs – secured fixed‑point supply contracts for three mid‑end passenger car platforms (sedan and SUV) with a combined annual volume exceeding 200,000 units.
- Export markets – the unit is currently being evaluated by two European OEMs for their entry‑level EV programmes.
This is not a prototype or a demonstration – it is a high‑volume production unit with mature supply chain and established manufacturing processes, offering OEMs a low‑risk path to market.
6. Competitive Advantages
Feature | 130kW 3in1 | Typical Competitor (130kW class) |
|---|---|---|
System Weight | 70 kg | 78‑85 kg |
Torque‑to‑Weight Ratio | 3.31 N·m/kg | 2.80‑3.00 N·m/kg |
Peak Efficiency | ≥94.5% | ~93.5% |
Voltage Range | 210‑470V | 250‑430V (narrower) |
Winding Type | Hair‑pin (Cu fill ≥72%) | Round‑wire or basic hair‑pin (~65%) |
Production Proven | Yes (>50k units) | Limited / new |
Cost‑effectiveness | Optimized for volume | Higher BOM cost |
The 130kW 3in1 matches or outperforms competitive offerings in every key metric – weight, efficiency, torque density, and voltage flexibility – while delivering a 10‑15% lower system cost due to design for manufacturability and shared‑component strategy.
7. Application Scenarios
- C‑segment electric sedans (e.g., WEY sedan, mainstream Chinese brand EVs)
- Compact and mid‑size electric SUVs (front‑ or rear‑axle drive)
- Electric crossover vehicles with moderate power requirements
- Front‑wheel‑drive and all‑wheel‑drive variants (dual‑motor configurations using two units)
- Global entry‑level EV models targeting cost‑sensitive markets
8. Conclusion
The 130kW 3in1 eAD represents the sweet spot in the passenger EV powertrain landscape – combining proven hair‑pin motor technology, lightweight integrated construction, a wide voltage range, and a cost structure that makes sense for high‑volume production. It is a ready‑to‑install, field‑validated system that enables OEMs to deliver compelling electric vehicles that are both fun to drive and affordable to own.
We welcome inquiries from global automotive manufacturers and tier‑1 suppliers seeking a dependable, scalable, and competitively priced e‑drive partner.
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