Direct Drive Systems for Ports & Bulk Material Terminals
Permanent magnet direct drive for terminal material handling — yard and overland conveyors, transfer towers, elevators, stackers, reclaimers and shiploaders — with drive selection, integration and commissioning support.
Where drives carry the load in a bulk terminal
Terminal throughput is set by the conveying system. Drives start under load, run through vessel windows and sit in an exposed marine environment — conditions where drivetrain simplicity and availability matter more than nameplate rating alone.
- 01
Receiving
Rail dumpers, truck tipplers and feeder conveyors move product into the terminal in bursts, with drives that start under load repeatedly through a shift.
- 02
Yard conveying
Long overland and yard conveyor runs carry the terminal's continuous duty, often across exposed marine environments with corrosive salt loading.
- 03
Stockpiling
Stackers and reclaimers combine travel, slew and boom conveying drives, where drivetrain weight and envelope directly affect machine design.
- 04
Shiploading
Shiploader and transfer tower conveyors run at high availability during a vessel window, where an unplanned drivetrain fault carries demurrage cost.
Where permanent magnet direct drive is applied
A permanent magnet motor wound for the driven speed removes the reducer, coupling and lubrication system from the drivetrain. In a terminal that matters most on continuous conveying duty, in confined drive locations and where corrosion drives maintenance cost. It is an application decision, not a blanket replacement for every geared drive on site.
Representative drive data
Values below are representative datasheet ranges for the permanent magnet drive equipment classes used in port and bulk terminal applications, together with a reference configuration supplied into terminal conveying duty. Final selection is confirmed against machine duty during engineering assessment.
Full motor family parameter ranges — line-start, variable-speed, low-speed direct drive and motorized pulley — are consolidated in the motor selection reference.
| 01Arrangement | Outer-rotor motor inside the drum, fixed shaft |
|---|---|
| 02Power range | 11 – 2 000kW |
| 03Voltage | 380 V – 10 kV |
| 04Belt speed | 1.0 – 6.2m/s |
| 05Drum length | 750 – 2 800mm |
| 06Drum diameter | 500 – 1 600mm |
| 07Protection | IP 55 |
| 01Power range | 11 – 3 000kW |
|---|---|
| 02Voltage | 380 V – 10 kV |
| 03Speed range | 5 – 500rpm |
| 04Arrangement | Gearless direct drive, hollow or solid shaft |
| 05Overload | Up to 3 × rated torqueManufacturer figure; confirmed per selection. |
| 06Starting | Starts under load at rated torque without current surge |
| 01Power range | 11 – 3 000kW |
|---|---|
| 02Voltage | 380 V – 10 kV |
| 03Speed range | 600 – 3 000rpm |
| 04Application | Pumps, fans and higher-speed auxiliaries |
| 01Power range | 11 – 3 000kW |
|---|---|
| 02Voltage | 380 V – 10 kV |
| 03Function | Matched control for permanent magnet motors, vector speed and torque control |
| 04Scope note | A permanent magnet motor is supplied and commissioned with a matched drive. |
| 01Equipment | Multiple direct drive pulleys, bulk material handling |
|---|---|
| 02Power range | 45 – 132kW |
| 03Voltage | 380 V |
| 04Change | Reducers and couplings removed from the drive train |
| 05Basis | Manufacturer reference documentation, not MotiraTech project experience |
What a terminal drive evaluation requires
An assessment starts from the machine and its duty, not from a catalogue. The following information is what we ask for before stating whether a direct drive conversion is technically and commercially appropriate.
- Machine and duty
- Conveyor, elevator, stacker or shiploader, with throughput, run hours and vessel or train cycle pattern.
- Belt data
- Belt width, speed, drum diameter, wrap arrangement and take-up type.
- Torque and power
- Rated and breakaway torque, absorbed power where measured, and starting requirements under load.
- Existing drivetrain
- Motor nameplate, gearbox ratio and service factor, coupling type, fault and maintenance history.
- Electrical supply
- Available voltage (380 V, 660 V, 1 140 V, 6 kV or 10 kV), capacity, starting method and existing drive equipment.
- Environment
- Salt and moisture exposure, dust loading, ambient temperature range and any hazardous-area classification.
- Access and outage
- Crane and access provision at the drive head, and the shutdown window available for a conversion.
Assess a drive application at your terminal
Send the machine, duty data and existing drivetrain details you are working from. We will tell you what can be assessed, what is missing and what the next step looks like.