QSMOTOR QSD180D-90H 20kW 72V Liquid-Cooled Hairpin PMSM Motor Kit with FarDriver ND721800B 1800A Controller
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$2,913.68
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QSMOTOR QSD180D-90H 20kW 72V Liquid-Cooled Hairpin PMSM Motor Kit with FarDriver ND721800B 1800A Controller
$2,913.68
Equip your high-performance electric motorcycle or hyper-EV build with the ultimate powertrain: the genuine QSMOTOR QSD180D-90H 20kW 72V Liquid-Cooled Hairpin PMSM Motor Kit paired with the high-output FarDriver ND721800B 800A/1800A Programmable Sine Wave Controller. Engineered for extreme torque density, race-grade thermal stability, and prolonged high-speed cruising, this mid-drive system produces exceptional continuous power and explosive track acceleration without thermal throttling.
At the heart of the system is QSMOTOR’s cutting-edge flat-wire Hairpin Winding Technology, dramatically boosting slot fill factor and magnetic efficiency while integrated liquid-cooling channels circulate coolant directly around the stator core. Controlled by the FarDriver ND721800B FOC sine wave controller via high-precision magnetic encoder feedback, the kit includes a heavy-duty 520 13T drive sprocket and a FarDriver Wireless Bluetooth Programming Module for instant smartphone parameter tuning (iOS & Android).
Key Highlights & Engineering Advantages
- 20kW Hairpin PMSM Architecture: Flat-wire hairpin copper windings maximize slot fill factor, reducing internal electrical resistance, eliminating hot spots, and providing superior electromagnetic torque density compared to conventional round-wire stators.
- Active Liquid Cooling Jacket: Direct stator liquid cooling maintains steady operating temperatures under grueling track conditions, high-speed highway cruising, and intense hill climbs.
- FarDriver ND721800B Super-Current Controller: Delivers up to 800A continuous DC battery current and a staggering 1800A peak phase current, extracting maximum mechanical power and acceleration from the QSD180D motor.
- Precision Magnetic Encoder: Closed-loop encoder feedback provides ultra-precise rotor angle detection, guaranteeing instantaneous throttle response, zero startup shudder, and flawless high-RPM timing accuracy.
- Electronic Flux Weakening: FarDriver’s dynamic field-weakening algorithms expand the motor's top-end RPM ceiling by 15%–25% for extreme top-speed runs.
- Rugged IP67 Ingress Protection: Fully sealed against high-pressure water spray, rainstorms, track mud, and debris.
Complete Package Inclusions
- 1× QSMOTOR QSD180D-90H: 20kW 72V Liquid-Cooled Hairpin PMSM Mid-Drive Motor with built-in encoder.
- 1× 520 13T Drive Sprocket: Heavy-duty heat-treated motorcycle chain sprocket pre-fitted for standard 520 drive chains.
- 1× FarDriver ND721800B Controller: 72V 800A DC / 1800A Phase Peak Programmable FOC Sine Wave Controller.
- 1× FarDriver Bluetooth Module: Wireless programming adapter for real-time mobile app parameter setup (iOS / Android).
- 1× Complete Pre-Terminated Wiring Harness: Automotive-grade connectors, signal pinouts, and phase leads.
Motor Technical Specifications Matrix
| Parameter | Specification |
|---|---|
| Brand / Manufacturer | QSMOTOR Genuine |
| Motor Model | QSD180D-90H |
| Motor Architecture | Permanent Magnet Synchronous Motor (PMSM) with Flat Hairpin Winding |
| Rated Power / Peak Power | 20kW Continuous / Up to 35kW+ Peak Output |
| Rated System Voltage | 72V DC (Operating range 60V–96V DC) |
| Cooling Method | Active Liquid Cooling (Inlet/Outlet Port Connectors) |
| Position Sensor | High-Precision Magnetic Rotary Encoder |
| Drive Sprocket | 520 13T Chain Sprocket included |
| Protection Rating | IP67 Weatherproof Ingress Protection |
| Net Motor Weight | Approx. 31 kg (Heavy-Duty Industrial Build) |
Mechanical Dimensions & Chassis Fitment Drawing
Motor Wiring Definition & Automotive Terminal Pinouts
FarDriver ND721800B Controller Architecture & Schematics
Important Installation & Operating Guidelines
- Cooling Loop Setup: Connect the motor's liquid-cooling ports to a dedicated automotive/motorcycle radiator with an electric water pump before high-power testing to prevent overheating.
- Lead Handling: Never lift or pull the motor by its heavy phase leads or sensor harness wires. Always support the cast motor casing.
- Phase & Encoder Alignment: Secure all high-current phase terminal connections tightly to avoid resistance heating. The encoder leads must be securely mated with the FarDriver controller connector.
- No Unauthorized Disassembly: Internal permanent magnets and stator windings are factory-balanced under precision tolerances. Opening the motor casing will void the warranty.
Frequently Asked Questions (FAQ)
Q: What is the benefit of Hairpin flat-wire windings compared to standard round wire?
A: Hairpin flat copper windings achieve a slot fill factor exceeding 70% (versus ~40% for round copper wire). This drastically reduces coil resistance, improves thermal conductivity directly into the liquid-cooled casing, and enables significantly higher sustained power output without thermal saturation.
Q: Why does this motor use a magnetic encoder instead of standard Hall sensors?
A: High-power PMSM motors operating at high RPM require extreme electrical angle resolution. The magnetic encoder provides continuous, high-precision closed-loop feedback to the FarDriver ND721800B, ensuring maximum torque efficiency and zero hesitation throughout the entire RPM curve.
Q: What battery pack specifications are recommended for this 20kW powertrain?
A: A 72V (20S–22S Li-ion or 24S LiFePO4) battery pack capable of supplying at least 300A–500A continuous discharge current with high-discharge cells (e.g., CATL, CALB, or Samsung high-drain cells) is recommended to take full advantage of the kit's performance.
Q: What warranty and technical support does E Smart Way provide?
A: E Smart Way backs this kit with 100% insured heavy-freight shipping, comprehensive transit protection, and a 1-year manufacturer warranty against defects. Our technical engineering team provides English software manuals, wiring diagrams, and baseline tuning assistance upon order.
Heavy Freight & International Delivery Notice
Secure Heavy-Crate Shipping: Due to the 31kg weight and high-strength neodymium magnets, this powertrain kit is packaged in custom reinforced protective crating with custom shock-absorption lining. Full international tracking is provided upon dispatch.
Customs & Import Clearance: Handled under standard international cross-border freight regulations. Any destination country import customs duties or inspection fees remain the responsibility of the purchaser.
Delivery Verification: Please confirm your delivery address and contact telephone number carefully at checkout to facilitate carrier freight delivery scheduling.
