Mil-Drive-55 Military Induction Motor Drive — FOC Vector Drive

The Mil-Drive-55 Military Motor Drive and Control Unit is a mil-spec induction motor drive — not a servo drive product category. It delivers precise speed, torque, and direction control for three-phase asynchronous motors on defence platforms. Field Oriented Control (FOC) provides servo-like positioning precision with the durability and cost profile of induction motor technology. Developed by TEDEG Defence R&D, the unit is MIL-STD-810G environmental and MIL-STD-461F EMI/EMC compliant, housed in a sealed enclosure, and passively cooled. Applications include armoured land vehicles, radar antenna drives, electro-optical turrets, missile launch pedestals, mobile mission units, and naval systems. The Mil-Drive-55 is positioned in the military asynchronous motor + FOC niche — a distinct segment versus servo-only premium drives and civilian-grade industrial VFDs.

The engineering foundation of the Mil-Drive-55 is FOC (Field Oriented Control) — an algorithm that monitors motor magnetic flux in real time to achieve torque and speed regulation at maximum efficiency. Compared to conventional drives, this approach yields reduced acoustic noise and significantly higher positioning precision. The system processes platform I/O signals including resolver, incremental and absolute encoder, NTC/PTC temperature sensor, emergency input, and Safe Torque Off (STO). The STO function features dual-channel architecture, immediately interrupting motor torque in emergencies — critical for both operator safety and mission reliability. RS-485 and CAN-Bus communication protocols enable integration with central command systems; operators can remotely access drive status, fault codes, limit switch information, serial number, and device ID. The passively cooled design (no fan) combined with the sealed aluminium enclosure minimises field maintenance and enables continuous operation under rain and harsh outdoor conditions. MIL-STD-461F compliance guarantees EMI/EMC compatibility with radar, communication, and sensor systems sharing the same platform.

Key technical values:

• Nominal power: 5.5 kW (optional up to 18 kW); output 3 × 400 VAC, 0–500 Hz; motor current 14 A
• Overload capacity: 150% (60 s), 175% (2.5 s)
• Input: 400 VAC ±10%, 48–62 Hz; phase imbalance max. 3%
• Start / stop: Ramp-up / ramp-down, configurable 0.1–600 s; PWM frequency 4–32 kHz (selectable)
• Communication: RS-485 (Modbus RTU) and CAN-Bus, adjustable 9600–115200 bps; operating status, fault codes, limit switch information, serial number and device ID are reported
• Mechanical: 245 × 350 × 145 mm, 12 ± 0.5 kg, aluminium 6000 series enclosure; mounting holes 225 × 330 mm, 4 × Ø8.5 mm
• Environmental: −30 °C … +55 °C operating temperature, 95% RH humidity resistance
• Monitoring and maintenance: Built-in operating hour meter, LED status indicators; optional OLED display support and Ethernet

The Mil-Drive-55 is deployed in turret rotation (azimuth and elevation) on armoured vehicles, precision positioning in electro-optical gimbal systems, pedestal control on missile launch platforms, antenna positioning in mobile radar systems, and stability systems on naval platforms. The dual-channel STO architecture interrupts motor torque rapidly under emergency conditions. The passive cooling and sealed-enclosure design preserve performance across diverse field conditions — rain exposure, humidity up to 95% RH, vibration, and shock — supporting both indoor and outdoor deployments.

Compliance standards:

• MIL-STD-810G — Environmental durability (vibration, shock, rain exposure)
• MIL-STD-461F — Electromagnetic interference and compatibility (EMI/EMC)

The TEDEG Defence R&D team moved the Mil-Drive-55 from concept to series production. Standard configurations are delivered in 8-12 weeks, compared to 20-26 weeks typical of global premium suppliers. Turkish manufacturing infrastructure provides meaningful cost advantage for NATO buyers, with no compromise on FOC software, STO architecture, or MIL-STD compliance. Custom configurations (alternative power levels, additional I/O channels, custom communication protocols) ship within 14-16 weeks thanks to the modular design.

The Mil-Drive-55 sits in a distinctive niche: combining 3-phase asynchronous motor + FOC + mil-spec certification — servo-like positioning precision with the durability and cost advantage of an induction motor.

Validated by Turkish Defence Primes: The system is supplied as an approved vendor of ASELSAN, Roketsan and the Turkish Ministry of National Defence (MSB). Field-proven service record in armoured vehicle, turret, radar, and missile launcher programmes within the Turkish Armed Forces inventory. NATO supplier registration (NCAGE): TM885. ITAR-Free — no US-origin controlled content.

Production Maturity: The Mil-Drive-55 is delivered at day-one production maturity — field-proven FOC vector algorithm, certified component supply chain (power stage, resolver/encoder interface, STO circuit), and rapid serial-production capability. Our team carries more than a decade of R&D and production experience in the defence motor-drive segment.