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High-efficiency electric chassis and permanent magnet synchronous traction drive systems
Optimized for urban delivery and commercial logistics platforms with direct drive integration.
High torque density permanent magnet motor ideal for medium commercial electrification.
Heavy-duty traction efficiency designed for urban transit and severe commercial duty cycles.
Maximum continuous output power for mining machinery, tractors, and heavy e-trucks.
The global electric vehicle transition has entered a transformative phase where conventional central-motor architectures are increasingly complemented by distributed drive technologies. Among these innovations, the In Wheel Electric Motor Car Conversion Kit For Electric Vehicle Powertrains stands out as a paradigm shift in how commercial fleets, public transit vehicles, and specialized heavy machinery achieve zero-emission retrofitting and new platform development. By directly housing the traction motor within the wheel hub, engineers eliminate traditional driveshaft losses, differentials, transfer cases, and heavy mechanical axles, converting electrical energy into linear dynamic displacement with unmatched efficiency.
In today's commercial vehicle sector—ranging from 4.5T light logistics trucks to 60T heavy-duty dump trucks and port haulers—the operational demand for maximized cargo volume and minimized deadweight has accelerated the deployment of hub-integrated powertrains. Conversion kits equipped with high-power Permanent Magnet Synchronous Motors (PMSM) enable commercial vehicle OEMs and fleet operators to repurpose legacy chassis or streamline new skateboard architecture designs. This decentralized traction approach provides precise dynamic torque vectoring per wheel, opening unprecedented opportunities for handling stability, micro-turning radii, and optimized regenerative braking energy recovery across variable duty cycles.
Creating an integrated solution for electric vehicle drive platforms that meet various usage needs across commercial, municipal, and industrial segments.
Tailored for last-mile urban delivery logistics, providing low-floor access, high maneuverability, and optimized battery integration within tight chassis dimensions.
Optimized low-speed, high-torque conversion kits for garbage compactors, street sweepers, and water sprinklers operating continuously in urban environments.
Full-flat interior floor capability for passenger transit buses enabled by direct hub drives, boosting passenger capacity and boarding accessibility.
High-kw permanent magnet motor systems capable of producing maximum instantaneous torque for heavy cargo transport and long-haul operations.
Custom high-grade sealed motor controllers and electric drive units adapted for marine propulsion, workboats, and specialized inland craft.
Ruggedized, IP68/IP69K protected wheel hub motor conversion kits built to withstand severe shocks, moisture, mud, and continuous high-load duty cycles.
A primary engineering consideration in deploying an In Wheel Electric Motor Car Conversion Kit For Electric Vehicle Powertrains is managing unsprung mass. Incorporating the motor, rotor, stator, and braking assembly inside the wheel hub increases shock loads directly transmitted to the vehicle suspension. Modern high-performance conversion kits solve this through multi-objective topology optimization and ultra-lightweight magnetic core materials.
By employing advanced silicon carbide (SiC) inverters, high-fill factor hair-pin stator windings, and lightweight aluminum-magnesium rotor sleeves, modern hub motors achieve power densities exceeding 4.5 kW/kg. High-frequency active suspension control strategies work synergistically with software torque vectoring to damp wheel oscillations, delivering smooth ride dynamics equal to or superior to conventional central axle configurations.
Operating inside the wheel arch exposes in-wheel electric motor kits to extreme thermal stress, brake friction heat, water splash, and dust intrusion. Thermal resilience is achieved via dual-circuit liquid cooling jacket designs that route coolant directly through the motor hub perimeter and stator tooth gaps.
For environmental sealing, high-reliability dual-lip rotary oil seals and nitrogen-pressurized labyrinth chambers prevent moisture ingress, satisfying rigorous IP67, IP68, and IP69K standards. PUMBAA's motor designs undergo thousands of hours of salt spray, thermal shock, and dust chamber testing to guarantee reliable service over 1,000,000 duty cycles.
While central motor drives require propeller shafts and central gearboxes, and integrated e-axles consolidate the motor and transmission onto a rigid beam, In-Wheel Motor Conversion Kits distribute power directly to the ground. This eliminates transmission gear mesh losses (saving 6% to 12% energy) and grants vehicle control units (VCU) microsecond-level independent wheel speed control. For heavy-duty commercial operations, this translates directly to extended battery range, reduced cost-per-kilometer, and lower total cost of ownership (TCO).
Explore our full line of Permanent Magnet Synchronous Motors (PMSM), Motor Controllers (MCU), Vehicle Control Units (VCU), Power Units (CDU), and Integrated E-Axles.
Permanent magnet traction drive system providing high power density and significant reduction in mechanical transmission friction.
Commercial electric vehicle drive PMSM motor with optimized electromagnetic layout for extended operational lifecycle.
Compact structure, simple integration, lightweight design perfectly adapted for light delivery vehicles and specialized sweepers.
Tested and validated on over 100 commercial vehicle models worldwide.
Enhanced thermal management, resilient high-grade magnetic materials, superior reliability, and power density output under severe duty cycles.
Highly integrated multi-functional architectures effectively reducing component counts, overall system volume, and installation complexity.
Inherent whole-vehicle development expertise ensuring all traction, battery, and controller components operate at peak overall efficiency.
Energy conversion efficiency exceeds industry standards by 10%. Highly sophisticated algorithms deliver ultra-precise motor torque execution.
Shared hardware platforms, optimized component count, and structural lightweighting deliver maximum return on investment and lower total cost of ownership.
Our engineering team provides end-to-end support for custom motor matching, VCU tuning, and complete conversion kit engineering.
Talk to Engineering
PUMBAA is a leading provider of high-efficiency Electric Vehicle drive systems. We design and manufacture permanent magnet synchronous motors (PMSM), electric vehicle motor controllers (MCU), vehicle control units (VCU), and electric vehicle power supply systems (DCDC, DCAC, OBC, PDU), tailored for a wide array of commercial electric vehicles. Creating an integrated solution for electric vehicle drive platforms that meet various usage needs.
Customizable
Cost-effective
High-performance
Technical Support
"We used to source motors globally, but those suppliers rarely allowed any design modifications. Working with PUMBAA has completely changed that. I can request various custom design changes based on project needs—whether for their Permanent Magnet Synchronous Motors (PMSM), Motor Controller Units (MCU), or Integrated E-Axles—they always accurately understand our drawings and deliver on time. The product precision is extremely high, fully meeting our specifications. PUMBAA truly provides a 'one-stop' electric drive platform solution."
"PUMBAA has redefined our model of collaboration with suppliers. They not only focus on quality, cost, and delivery but have also brought us core value-creating capability. This is reflected in their perspective on total lifecycle cost optimization, building supply chain transparency, and serving as a technology bridge to rapidly translate cutting-edge powertrain technologies into robust adoptable solutions for our vehicle fleet."
Our partners in China and globally include a consortium of leading OEMs: Sany, Zoomlion, Jiangling, Chery, China CNR, Ruichi, Chang'an, JAC, Dongfeng, and Jinlong.
Browse our complete range of central e-axles, high-power drive motors, motor control units, and electric vehicle logistics chassis.
Full electric chassis engineered specifically for light-duty commercial logistics fleets.
120kW PMSM direct traction drive featuring liquid cooling and high energy conversion rates.
Permanent magnet synchronous motor optimized for medium buses and 10T commercial trucks.
Heavy-duty 350kW continuous rating PMSM drive built for high payload capacity vehicles.
Compact central e-axle providing cost and integration space advantages for 6m transit buses.
Universal VCU supporting all commercial EV/HEV models with advanced dynamic power management strategies.
High-power e-axle engineered for municipal sanitation machinery requiring continuous heavy torque output.
Highly robust 60kW synchronous motor providing high efficiency for urban delivery vans and mini-trucks.