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Frameless Torque Motors
Torque Motors

QTR 65 Series – Frameless Torque Motor

Compact frameless rotary torque motor with continuous torque from 0.29 Nm to 2.31 Nm, peak torque from 0.42 Nm to 3.82 Nm and speeds up to 28,000 rpm. Optimised for low voltage applications.

Product Overview

Motion Type

Rotary
Technology

Frameless Torque
Product Range

Torque Motors
Series

QTR 65

Key Performance Specs

  • Continuous Torque Up To: 2.31 Nm
  • Speed Up To: 28000 rpm
  • Outside Diameter: 65 mm
  • Inside Diameter: 17 mm

Key Features

  • Continuous torque range 0.29 Nm to 2.31 Nm
  • Peak torque range 0.42 Nm to 3.82 Nm
  • Speed up to 28,000 rpm at maximum voltage
  • Speed up to 5,735 rpm at 48 V
  • Motor outside diameter 65 mm
  • Motor inside diameter 17 mm
  • Optimised for low voltage applications
  • Frameless direct drive design

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QTR 65 Series – Frameless Torque Motor

QTR 65 Series of Frameless Rotary Torque Motors

Introducing the QTR 65 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: QTR 65 Series – Frameless Torque Motor

QTR 65 Series Symbol Unit QTR-A 65-17 QTR-A 65-25 QTR-A 65-34 QTR-A 65-60
Winding type N N Y Y
Motor type, max voltage ph-ph (3-phase synchronous) V ac rms (V dc) 420 (600)
Ultimate torque (magnet @ 25°C) Tu Nm 0.64 1.31 2.25 5.47
Peak torque (magnet @ 25°C) Tp Nm 0.42 0.85 1.43 3.82
Continuous torque (coil @ 100°C) Tc Nm 0.29 0.66 1.08 2.31
Maximum speed @ 48 V (@ Tc) nmax rpm 5735 2673 3456 910
Maximum speed @ max. voltage (@ Tc) nmax rpm 28000 28000 28000 16960
Motor torque constant (up to Ic) Kt Nm/Arms 0.060 0.118 0.098 0.267
Motor constant (coils @ 25°C) Km (Nm)²/W 0.0021 0.0059 0.0111 0.0321
Ultimate current (magnet @ 25°C) Iu Arms 13.84 13.84 27.98 24.99
Peak current (magnet @ 25°C) Ip Arms 7.58 7.58 15.32 15.05
Maximum continuous current (coils @ 100°C) Ic Arms 4.86 5.61 11.07 8.65
Back EMF phase-phase peak Ke V/krpm 5.1 10.1 8.4 22.8
Back EMF phase-phase rms Ke V/krpm 3.6 7.2 5.9 16.1
Coil resistance per phase (coils @ 25°C ex. cable) R Ω 0.575 0.799 0.287 0.741
Coil induction per phase (I < 0.6 Ip) L mH 0.86 1.62 0.69 2.10
Electrical time constant (coils @ 25°C) τe ms 1.5 2.0 2.4 2.8
Poles Nmgn nr 8 8 8 8
Continuous power loss (coils @ 100°C) Pc W 53 99 138 217
Thermal resistance (coils to mount. sfc.) Rth °C/W 1.50 0.81 0.58 0.37
Thermal time constant (up to 63% max. coil temp.) τth s 21 16 16 38
Temperature cut-off / sensor No temperature sensor

All specifications ±10%. 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. Maximum allowable speed for QTR 65 series motors is 28,000 rpm; please contact us for high speed applications.

Product Dimensions: QTR 65 Series – Frameless Torque Motor

QTR 65 Mechanical Symbol Unit QTR-A 65-17 QTR-A 65-25 QTR-A 65-34 QTR-A 65-60
Stator OD ODs mm 65
Rotor ID IDR mm 17
Motor height Hmotor mm 18 26 35 62
Lamination stack height Hlam mm 8 16 24 48
Rotor inertia JR kg·m² 3.8E-06 7.5E-06 1.1E-05 2.3E-05
Stator mass (excluding cables) MS g 149 248 361 717
Rotor mass MR g 27 54 80 160
Total mass (excluding cables) MT g 176 302 441 877
Cable mass (all cables) m g 36
Cable type (power), length 0.5 m d mm (AWG) 2.06 (16)

Product Technical Drawings: QTR 65 Series – Frameless Torque Motor

QTR 65 Series - Frameless Torque Motor technical drawing

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