Gearless PM Direct Drive
A gearless permanent-magnet drive pulley: the shell itself is the rotor, the shaft the stator. No gearbox, oil or belts. Power 11–1600 kW, VFD-controlled, for heavy mining, ports and overland conveyors.
- Mining and long overland conveyors
- Ports and bulk transfer
- Coal, non-ferrous and ferrous metallurgy
- Power and building materials
- High-power multi-drive systems
Ranges are typical data from leading heavy-duty gearless PM-drive manufacturers, shown as an industry reference — not a TM-Service model range.
| Series | Diameter, mm | Rated power, kW | Belt speed, m/s | Frequency, Hz | Throughput, t/h | Belt width, mm |
|---|---|---|---|---|---|---|
| PM Direct-Drive Pulley 22–55 kW | — | 22–55 | — | 5–50 | — | — |
| PM Direct-Drive Pulley 60–160 kW | — | 60–160 | — | 5–50 | — | — |
| PM Direct-Drive Pulley — full published envelope | 500–2000 | 11–1600 | 0.8–6 | 5–50 | ≤ 5000 | ≤ 2400 |
Published manufacturer data — not a TM-Service model range.
- 01Determine belt tension T1+T2 (radial load).
- 02Ensure T1+T2 is below the series' max allowable radial load.
- 03Refine diameter, power, torque and speed for the duty.
- 04Match mounting dimensions to the existing conveyor.
- 05Confirm operating conditions: IP, temperature, abrasion, Ex-protection.
- Outer-rotor PM (shell), fixed shaft-stator
- No gearbox or oil system
- VFD control 5–50 Hz, accuracy ±0.1%
- High-voltage versions 6000/10000 V
- Temperature/bearing/vibration monitoring (option)
- Tiers 22–55 kW, 60–160 kW and above
- Multi-drive configurations (e.g. 6×315 kW)
- High-voltage versions 6000/10000 V
- IE4/IE5 efficiency class
- Online condition monitoring
Technology comparison from published manufacturer data.
| Geared drum motor | Gearless PM direct drive | |
|---|---|---|
| Power range | ≈ 0.025–250 kW | 11–1600 kW |
| Drive architecture | Motor + gearbox inside drum | Outer-rotor PM, direct drive |
| Gearbox | Planetary / helical | None |
| Oil | Oil-lubricated (or oil-free variant) | No oil, no belts |
| Maintenance | Periodic maintenance | Virtually maintenance-free |
| Control | DOL / VFD | VFD 5–50 Hz |
| Diameter | ≈ 80–1000 mm | 500–2000 mm |
| Applications | Unit & bulk goods, food, logistics | Heavy mining, ports, long overland conveyors |
Original → required parameters → mounting dimensions → conditions → technically suitable replacement. We don't claim full identity — an engineer confirms the suitable execution.
Why is PM direct drive better than a geared drive?
No gearbox, oil or belts — fewer losses and less maintenance, high efficiency (IE4/IE5), precise speed control and high low-speed torque. Requires a VFD.
What is the maximum power?
Up to 1600 kW in heavy mining applications (e.g. 6×315 kW multi-drive systems), throughput up to 5000 t/h.