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QTL 290 Series – Frameless Torque Motor

High torque frameless rotary motor with continuous torque from 140 Nm to 305 Nm, peak torque from 316 Nm to 632 Nm and speeds up to 306 rpm. A 290 mm outside diameter with a 220 mm through bore.

Product Overview

Motion Type

Rotary

Technology

Frameless Torque

Product Range

Torque Motors

Series

QTL 290

Key Performance Specs

  • Continuous Torque Up To: 305 Nm
  • Speed Up To: 306 rpm
  • Outside Diameter: 290 mm
  • Inside Diameter: 220 mm

Key Features

  • Continuous torque range 140 Nm to 305 Nm
  • Peak torque range 316 Nm to 632 Nm
  • Speed up to 306 rpm at 680 V dc
  • Motor outside diameter 290 mm
  • Motor inside diameter 220 mm
  • Motor heights 65 mm, 85 mm and 105 mm
  • PTC 1 kΩ and PT1000 thermal protection
  • Frameless direct drive design

QTL 290 Series – Frameless Torque Motor

QTL 290 Series of Frameless Rotary Torque Motors

Introducing the QTL 290 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.

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 290 Series – Frameless Torque Motor

QTL 290 Series Symbol Unit QTL-A 290-65 QTL-A 290-85 QTL-A 290-105
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 140 222 305
Stall torque (coil @ 100°C) Ts Nm 99 157 215
Maximum speed (@ Tc @ 680 V dc) nmax rpm 306 189 130
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 7.14 7.54 7.75
Stall current (coils @ 100°C) Is Arms 5.05 5.33 5.48
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 948 1410 1864
Thermal resistance (coils to mount. sfc.) Rth °C/W 0.084 0.057 0.043
Thermal time constant (up to 63% max. coil temp.) τth s 57 52 49
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 radial mounting of the stator lamination stack.

Product Dimensions: QTL 290 Series – Frameless Torque Motor

QTL 290 Mechanical Symbol Unit QTL-A 290-65 QTL-A 290-85 QTL-A 290-105
Stator OD ODs mm 290
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 6.0 8.3 10.8
Rotor mass MR kg 2.3 3.5 4.7
Total mass (excluding cables) MT kg 8.3 11.8 15.5
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 290 Series – Frameless Torque Motor

QTL 290 Series - Frameless Torque Motor technical drawing