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QTL 310 Series – Frameless Torque Motor

Water cooled frameless rotary torque motor with continuous torque from 151 Nm to 331 Nm, peak torque from 316 Nm to 632 Nm and speeds up to 298 rpm. An integrated cooling ring suits high duty cycle applications, with a 310 mm outside diameter and 220 mm through bore.

Product Overview

Motion Type

Rotary

Technology

Frameless Torque

Product Range

Torque Motors

Series

QTL 310

Key Performance Specs

  • Continuous Torque Up To: 331 Nm
  • Speed Up To: 298 rpm
  • Outside Diameter: 310 mm
  • Inside Diameter: 220 mm

Key Features

  • Continuous torque range 151 Nm to 331 Nm
  • Peak torque range 316 Nm to 632 Nm
  • Speed up to 298 rpm at 680 V dc
  • Motor outside diameter 310 mm
  • Motor inside diameter 220 mm
  • Motor heights 65 mm, 85 mm and 105 mm
  • Integrated cooling ring for high duty cycles
  • PTC 1 kΩ and PT1000 thermal protection
  • Frameless direct drive design

QTL 310 Series – Frameless Torque Motor

QTL 310 Series of Frameless Rotary Torque Motors

Introducing the QTL 310 Series frameless rotary torque motor by Tecnotion. Torque motors excel in their direct drive capabilities, eliminating the need for a transmission or gearbox. The rotor of the torque motor is securely attached directly to the driven part, reducing transmission losses and eliminating the cost and maintenance associated with additional components. With no contact between the rotor and stator, mechanical wear is eliminated, resulting in reduced maintenance and extended lifespan. These motors provide a high continuous torque throughout the entire rev-range. The required torque and available space play a role in determining the motor’s diameter and width. This allows for slim motors in height but large in diameter for applications such as axles and turntables, or compact yet high-torque motors with similar height and diameter dimensions.

Water Cooling for High Duty Cycles

The QTL 310 Series is fitted with an integrated cooling ring, allowing the motor to sustain higher continuous torque under demanding duty cycles. Liquid cooling draws heat away from the stator efficiently, keeping performance stable during prolonged high load operation and helping to extend motor life.

Applications for Torque Motors

Frameless torque motors find applications in a variety of industries and fields. They are commonly used in robotics, precision manufacturing, semiconductor manufacturing equipment, medical devices, aerospace, and defence systems. The compact design and high torque output make them ideal for applications where space is limited, yet high-performance and direct drive capabilities are required. Frameless torque motors are also well-suited for tasks that demand precise and accurate motion control, such as rotary tables, indexers, and positioning systems. Their versatility and reliability make them a preferred choice for demanding applications across multiple industries.

Product Specifications: QTL 310 Series – Frameless Torque Motor

QTL 310 Series Symbol Unit QTL-A 310-65 QTL-A 310-85 QTL-A 310-105
Winding type N N N
Motor type, max voltage ph-ph (3-phase synchronous) V ac rms (V dc) 480 (680)
Ultimate torque (magnet @ 25°C) Tu Nm 389 583 778
Peak torque (magnet @ 25°C) Tp Nm 316 474 632
Continuous torque (coil @ 100°C) Tc Nm 151 241 331
Stall torque (coil @ 100°C) Ts Nm 107 170 234
Maximum speed (@ Tc @ 680 V dc) nmax rpm 298 182 124
Motor torque constant (up to Ic) Kt Nm/Arms 19.7 29.5 39.3
Motor constant (coils @ 25°C) Km (Nm)²/W 27.0 45.5 64.7
Ultimate current (magnet @ 25°C) Iu Arms 22.0 22.0 22.0
Peak current (magnet @ 25°C) Ip Arms 16.9 16.9 16.9
Maximum continuous current (coils @ 100°C) Ic Arms 7.70 8.16 8.42
Stall current (coils @ 100°C) Is Arms 5.44 5.77 5.96
Back EMF phase-phase peak Ke V/krpm 1681 2521 3362
Back EMF phase-phase rms Ke V/krpm 1189 1783 2377
Coil resistance per phase (coils @ 25°C ex. cable) R Ω 4.77 6.37 7.96
Coil induction per phase (I < 0.6 Ip) L mH 23.9 34.7 45.5
Electrical time constant τe ms 5.0 5.5 5.7
Poles Nmgn nr 38
Continuous power loss (coils @ 100°C) Pc W 1102 1653 2204
Thermal resistance (coils to mount. sfc.) Rth °C/W 0.073 0.048 0.036
Thermal time constant (up to 63% max. coil temp.) τth s 49 44 41
Water cooling flow (for ΔT=3K) Φw l/min 5.3 7.9 10.5
Water cooling pressure drop (order of magnitude) ΔPw bar 1.0 1.4 2.0
Temperature cut-off / sensor PTC 1 kΩ (3x) / PT1000 (3x)

All specifications ±10%. Actual values depend on bus voltage. Values assume a mounting surface at 20°C with the motor driven at maximum continuous current. Thermal resistance is based on the given water flow and pressure.

Product Dimensions: QTL 310 Series – Frameless Torque Motor

QTL 310 Mechanical Symbol Unit QTL-A 310-65 QTL-A 310-85 QTL-A 310-105
Stator OD ODs mm 310
Rotor ID IDR mm 220
Motor height Hmotor mm 65 85 105
Lamination stack height Hlam mm 40 60 80
Rotor inertia JR kg·m² 0.031 0.046 0.061
Stator mass (excluding cables) MS kg 7.4 10.1 12.9
Rotor mass MR kg 2.3 3.5 4.7
Total mass (excluding cables) MT kg 9.7 13.6 17.6
Cable mass (all cables) m g 500
Cable type (power), length 2 m d mm (AWG) 10.6 (13)
Cable type (sensor), length 2 m d mm (AWG) 6.4 (25)

Product Technical Drawings: QTL 310 Series – Frameless Torque Motor

QTL 310 Series - Frameless Torque Motor technical drawing