Kollmorgen TT-2931-1010-AG DC Servo Motor (with Tachometer Generator)

I. Product Overview

TT-2931-1010-AG is a high-performance DC servo motor from the Kollmorgen TT series, integrating a coaxial tachometer generator as the speed feedback. This series is a classic brushed DC servo, known for its high torque inertia ratio, smooth operation at low speeds, fast response, and analog tachometer feedback. It is specifically designed for high-precision position/velocity closed-loop control, analog control systems, aerospace, military, special automation, etc., which have strict requirements for reliability and stability. 

II. Model Code Analysis (TT-2931-1010-AG)

TT: Kormogren DC servo motor + built-in tachometer generator series

2931:

29: Motor frame diameter (2.93 inches / 74.4mm)

31: Motor length code (standard length)

1010:

10: Winding electrical specifications (10th winding, medium voltage / medium speed characteristics)

10: Tachometer generator specifications (10th standard output)

AG:

A: Installation form (IEC standard B5 flange, N-level tolerance)

G: Shaft end / feedback / protection (standard keyway shaft, IP65 housing, tachometer feedback)

III. Core Technical Parameters

(1) Electrical Parameters (DC Servo)

Rated Voltage: 48VDC (typical), compatible with 24~60VDC

Rated Power: ~650W

Continuous Stall Torque: 1.8 Nm

Peak Torque: 5.4 Nm (3 times overload, short time)

Continuous Current: 7.5 A

Peak Current: 22.5 A

Torque Constant (Kt): 0.24 Nm/A

Reverse Electromotive Force Constant (Ke): 2.5 V/1000rpm

Armature Resistance: 0.65 Ω

Armature Inductance: 1.2 mH

Rated Speed: 3500 rpm

Maximum Speed: 5000 rpm

Regulation Method: Brushed (graphite / noble metal brushes)

Insulation Class: F Class (155℃)

Thermal Protection: Built-in PTC thermistor

(2) Tachometer Parameter

Feedback Type: Coaxial DC tachometer generator

Output Sensitivity: 3.0 V/1000rpm (±1%)

Output Ripple: < 2% (peak-to-peak)

Linearity: ±0.5% (full speed range)

Output Impedance: Low impedance, directly compatible with analog controller

(3) Mechanical Parameters

Flange Size: 74.4mm (2.93") circular flange

Shaft Diameter: 12.7 mm (1/2"), standard keyway (4×4×16mm)

Rotor Inertia: 0.00018 kg·m²

Overall Weight: ~1.8 kg

Bearings: Double precision ball bearings

Life: ≥20,000 hours (rated conditions)

(4) Environment and Connection

Protection Grade: IP65 (housing), shaft end IP54

Operating Temperature: -40℃ ~ +85℃ (military-grade wide temperature)

Storage Temperature: -55℃ ~ +125℃

Connectors: 2 channels MIL-C-5015 military circular connectors

Power: 2 pins (armature +)

Feedback: 4 pins (tachometer +/-, brush, ground)

Certifications: CE, UL, military MIL standards certification

IV. Product Core Characteristics

Classic brushed DC, high dynamic performance

TT series brushed DC design, extremely fast torque response (<1ms), low-speed zero pulsation, simple control, suitable for high-precision point motion, frequent start-stop, ultra-low-speed smooth operation in analog systems.

Coaxial analog tachometer feedback (no battery)

Built-in DC tachometer generator, pure analog, no electronic components, no power supply, never loses data, extremely strong anti-interference, compatible with old-fashioned analog servo drives, military systems, aerospace onboard equipment.

Wide temperature military-grade reliability

-40℃ ~ +85℃ operating temperature range, IP65 protection, noble metal brushes, military connectors, resistant to vibration, impact, oil contamination, salt fog, meeting aerospace, shipboard, vehicle-mounted, extreme industrial environments.

Compact high power density

74mm small body output 1.8Nm continuous torque, power density > 350W/kg, suitable for equipment with limited space and requirements for small volume and high torque.

Standard interface easy integration MIL military connector, 48VDC standard voltage, 3.0V/krpm speed output. It can directly replace the same series TT motors, plug-and-play, no need to rewire / modify parameters.

V. Typical Application Scenarios

Aerospace: airborne radar, electro-optical pods, valve control, flight simulator

Military equipment: fire control system, electro-optical turntable, vehicle servo, ship stability platform

Precision machine tools: coordinate boring machine, grinding machine, optical processing, ultra-precision positioning

Simulation control system: retrofit of old servo systems, analog closed-loop, no digital bus scenarios

Special automation: semiconductor equipment, testing instruments, medical equipment, packaging machinery

Vehicle / Shipborne: mobile equipment, stable platform, reliable drive in harsh environments

VI. Accessories and Selection

Compatible drivers: Kolmorgen GOLDRINE, B-200/B-400, AX-2000 series; third-party analog DC servo drivers

Recommended cables: military specification 2×1.5mm² (power), 4×0.5mm² (feedback)

Maintenance: brush life is approximately 5000~8000 hours, can be replaced on-site; commutator fine grinding can extend lifespan

VII. Summary of Product Advantages

TT-2931-1010-AG is a classic DC servo with a 74mm frame, 48VDC, 1.8Nm, 3500rpm, 3.0V/krpm analog speed output, IP65, military wide temperature range. Core advantages: pure analog speed output with zero failure, ultra-high-speed response, low-speed ultra-smooth, military-grade reliability, wide temperature range adaptation for harsh environments, compact high torque. It perfectly meets the requirements of military / aerospace / precision industrial applications such as analog closed-loop, high precision, high reliability, extreme environments, and no digital bus, and is the preferred model for replacing old servo systems and high-reliability analog control.