QS138 90H 48-84V 4000W Mid Drive Motor

QS138 90H 48-84V 4000W mid drive motor used for electric light motorcycle get to 72V 120KPH with a pretty good quality and powerful performance.

Key Features:
1) Light weight and small dimension compare to hub motor
2) High performance benefit from flux weakening
3) High efficiency during climbing, and better acceleration
4) Support regenerative braking

Specifications:
Motor Type: PMSM permanent magnet brushless mid motor
Motor Design: Single axle
Matched Tire: 12inch wheel and tire (as default)
Magnet Height: 90mm, 5 pole pairs
Dimension: Φ180x315mm
Rated Power: 4000W
Peak Power: 13500W
Rated Voltage: 48-84V DC universal voltage (72v is the best)
Speed: 4000RPM (basic RPM)
Flux Weakening: 6500RPM
Max Torque: 72N.m
Cooling Method: Air cooling
Max. Efficiency: 85-94%
Continuous Battery Current: 67A (72V)
Peak Battery Current: 300A (72V)
Thermic Probe: KTY83/122
Insulation Grade: F
Working Temperature: 70-120°C, Max. 150°C
Hall Sensor: Single hall set with waterproof connectors
Phase Wire: 30mm² cross section (not include insulation layer)
Waterproof Grade: IP67
Color: Black
Net Weight / Gross Weight: 13.07kgs / 14.85kgs
Packing Carton Size: 34x34x38cm

Packing Items:
QS138 90H 48-84V 4000W Mid Drive Motor with sprocket design

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FAQ

1. Who are we?
We are iEE Power Co Limited, a professional provider of high-quality bicycles and accessories. We are committed to offering innovative products and exceptional services to meet the cycling needs of customers around the world.

2. How can we guarantee quality?
We implement a strict quality management system, with all products undergoing multiple rounds of rigorous quality checks to ensure they meet international quality standards. Additionally, we work with leading manufacturers in the industry to ensure top-notch raw materials and manufacturing processes.

3. What can you buy from us?
You can purchase a wide range of bicycles (such as city bikes, mountain bikes, road bikes, etc.) and accessories (such as wheels, saddles, handlebars, cycling apparel, etc.) on our website, offering everything you need for an enjoyable ride.

4. Why should you buy from us, not from other suppliers?
By choosing us, you not only gain access to industry-leading technology and design, but also enjoy top-tier customer service and quality assurance. We focus on each customer’s unique needs, offering personalized product recommendations and professional after-sales service for a worry-free shopping experience.

5. What services can we provide?
We provide a comprehensive shopping experience, including pre-sale consultations, product customization, fast shipping, and thorough after-sales services. Our technical support team is always ready to assist you with product usage or installation questions, ensuring you get the best cycling experience.