QS Motor QSD180A-90
QS180 90H Mid Drive Motor — 8000W rated, 18kW continuous, 20kW peak IPM PMSM inrunner. 180mm stator diameter, 90mm stack height, 4 pole pairs. The largest QS mid-drive motor. 4300-6000 RPM, 14.3 Nm rated / 100 Nm peak torque. 300A max DC current, 850A max phase current. Encoder sensor with PT1000 temperature probe. Air cooled, IP67. 150 km/h capable. For adult electric motorcycle builds.
In brief: 8000W mid-drive motor. 48–72V rated. From $498 across 2 sellers.
Specs verified Jun 12, 2026
Where to Find
Prices tracked across 3 sellersPrice History
Price History
Price changes tracked by the crawler
No price history data yet
History is recorded when the crawler detects price changes or when product link prices are manually updated.
Reviews
No reviews yet — be the first to share your experience.
Sign in with Google to leave a review.
Specifications
Motor Design
- Design
- Inrunner PMSM
- Stator Diameter
- 180mm
- Stator Height
- 90mm
- Pole Pairs
- 4
- Shaft Type
- Spline
- Cooling
- Air
Performance
- Wattage
- 8000W
- Peak Wattage
- 20000W
- Rated Voltage
- 48–72V
- Rated RPM
- 4300
- Max Torque
- 100.00Nm
Electrical
- Continuous DC Amps
- 300A
- Max Phase Amps
- 850A
- Flux Weakening RPM
- 6000RPM
Features
- PAS Sensor Type
- None
- Temp Sensor
- PT1000
- Has Encoder
- Yes
Physical
- Weight
- 21.6 kg
- IP Rating
- IP67
Ports & Connectors
Phase Wires3 Ring Terminals
Motor Phase
| Pin | Wire color | Function |
|---|---|---|
| 1 | Yellow | Phase A |
| 2 | Green | Phase B |
| 3 | Blue | Phase C |
Encoder
Hall SensorTemperature
| Pin | Wire color | Function |
|---|---|---|
| 1 | Red | 5V Power |
| 2 | Black | Ground |
| 3 | Yellow | Encoder A |
| 4 | Green | Encoder B |
| 5 | Blue | Encoder Z (Index) |
| 6 | Orange | Motor Temp |
| 7 | White | Ground |
| 8 | No color | None |
