Over 100 locomotives delivered across 8 countries. In-house R&D, ATEX, Li-ion modernisation.
The same drive and control family scales from pure trolley to hybrid. Topology: catenary or on-board charger → DC bus → UNIFREM/NEXIFREM traction inverter → motors, with NEXIBOOST bidirectional DC-DC ↔ battery + LOKO BMS on the energy side.
Fully battery-powered - no catenary. Suited for short hauls, maintenance and yard moves.
Classic 250–600 V DC catenary. Most economical for long, regular routes.
Catenary + battery. Brake-energy recuperation, voltage support, ride-through of short outages.
Traction inverters, BMS, battery modules, chargers, diagnostics and testing equipment - designed and manufactured under one roof. Ex ib and Ex d ATEX certified for explosive atmospheres.
11–250 kW, output frequency up to 200 Hz, motors 0–250 kW. ATEX variants for explosive atmospheres.
Bidirectional 4-switch buck-boost, SiC (ROHM), efficiency ≥ 98 %, IP54. Bridge between DC bus and battery in hybrid systems.
Charge control, cell balancing, protections, integration with main controller (Modbus RTU/TCP, CAN).
Our own VONSCH LV01–LV04 range (NMC and LFP) with integrated BMS, or 3rd party battery integration to customer specification.
Modular, parallel-stackable. SiC or IGBT
Crash logger, camera safety system, impact and event diagnostics.
Functional testing of inverters, BMS and battery packs before shipment. Processes per ISO 9001.
Pantograph powers the motors directly; battery idles at target SOC.
Catenary and battery together - for peak loads and voltage support.
Workshop moves, catenary gaps, short manoeuvres.
Braking energy is routed back to the battery or to the grid - no resistor burning.
A mining locomotive must slow down safely and in a controlled way even in demanding mine conditions. Yet the operator does not …
Traction drive and battery power for a mining locomotive in demanding conditions.
The original lead-acid battery limited the locomotive’s power and availability.
A trolley line in a mine means costly infrastructure, movement limited to electrified sections and permanent maintenance costs.…
All references in category Traction drives →
The complete system consists of the following blocks delivered under one brand:
All blocks are engineered to integrate seamlessly. The customer receives one complete system - not a collection of independent components.
Drives: IEC 61800-2/-3/-5-1 · EN 13849-1 PL c STO · EN 15595 (wheel-slip).
Traction: IEC 60322 · EN 50163 · GMG Recommended Practices for Battery EVs in Underground Mining (v3, 2022).
Batteries: UN 38.3 transport.
Hybrid locos (tier-1 AU): EN 50124 / 50125 / 45545 / 50155.
Lifecycle: 10+ years of product support, no-EOL components policy, long-term obsolescence management on power semiconductors and control PCBs.
Every locomotive undergoes EMC measurement and validation in our testing facility before shipment. In-house infrastructure shortens time-to-deploy and guarantees compliance.
Beyond mining locomotives we have completed projects extending our traction expertise:
Our 2016 motto still holds: "Solutions of power electronics without compromises."