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UM Series – Ironless Linear Motors

High speed ironless linear motors with continuous force from 29 N to 116 N, peak force from 100 N to 400 N and speeds up to 18 m/s at 300 V. Available in N and S winding variants with PTC and NTC thermal protection.

Product Overview

Motion Type

Linear

Technology

Ironless

Product Range

Linear Motors

Series

UM

Key Performance Specs

  • Continuous Force: 116 mm
  • Maximum Speed: 18 m/s

Key Features

  • Continuous force range 29 N to 116 N
  • Peak force range 100 N to 400 N
  • Speeds up to 18 m/s at 300 V
  • Motor size 21.1 mm wide x 68 mm high
  • Magnet pitch 30 mm
  • N and S winding variants available
  • PTC 1 kΩ and NTC thermal protection
  • Ironless design for smooth, cog-free motion
  • Direct drive technology with no mechanical transmission

UM Series – Ironless Linear Motors

UM Series of Ironless Linear Motors

The UM Series ironless linear motor by Tecnotion is a high precision linear motor designed to excel in demanding industrial conditions. Its robust construction suits a wide variety of industries. Using direct drive technology, the UM Series enhances productivity, accuracy and dynamic performance, eliminating the need for mechanical transmissions such as rack and pinion, belts and speed reducers. The absence of contact between the coil unit and magnets ensures zero mechanical wear. This approach enables slimmer, modular designs while reducing cost, setting a high standard for precision, durability and versatility across industrial applications.

Ironless Linear Motor

The UM Series of ironless linear motors from Tecnotion offers a precision motion solution across a broad range of applications. These motors deliver exceptional precision and accurate motion, making them well suited to demanding tasks. Ironless linear motors also offer efficient thermal performance, preventing overheating and helping to extend motor life. The result is a reliable, efficient solution for applications that demand precision motion with zero cogging.

Applications for Linear Motors

Precision linear motors are central to applications demanding high levels of accuracy and repeatability. They are widely used in laser cutting, scanning, digital printing, and electronics assembly and inspection. They also feature in processes such as Automatic Optical Inspection (AOI) and laser micro-machining, where ultra precision and accurate scan motion are required. In medical and scientific equipment, precision linear motors are relied on for accuracy and repeatability across every cycle.

Product Specifications: UM Series – Ironless Linear Motors

UM Series Ironless Symbol Unit UM3 N UM3 S UM6 N UM6 S UM9 N UM9 S UM12 N UM12 S
Motor type, max voltage ph-ph 3-phase synchronous ironless, 230 V ac rms (325 V dc)
Peak force (magnet @ 25°C) Fp N 100 200 300 400
Continuous force (coils @ 110°C) Fc N 29 58 87 116
Maximum speed (@ 300 V) vmax m/s 10 18 10 18 10 17 10 16
Motor force constant (mount. sfc. @ 20°C) K N/Arms 36.3 19.9 36.3 19.9 36.3 19.9 36.3 19.9
Motor constant (coils @ 25°C) S N²/W 24 48 71 95
Peak current (magnet @ 25°C) Ip Arms 2.8 5.0 5.5 10.0 8.3 15.0 11.0 20.0
Maximum continuous current (coils @ 110°C) Ic Arms 0.8 1.5 1.6 2.9 2.4 4.4 3.2 5.8
Back EMF phase-phase peak Bemf V/m/s 30 16 30 16 30 16 30 16
Resistance per phase (coils @ 25°C ex. cable) Rph Ω 18.5 5.5 9.3 2.8 6.2 1.8 4.6 1.4
Induction per phase Lph mH 6 1.8 3 0.9 2 0.6 1.5 0.4
Electrical time constant (coils @ 25°C) τe ms 0.35 0.35 0.35 0.35
Maximum continuous power loss (all coils) Pc W 47 95 142 190
Thermal resistance (coils to mount. sfc.) Rth °C/W 1.8 0.9 0.6 0.45
Thermal time constant (up to 63% max. coil temp.) τth s 36 36 36 36
Temperature cut-off / sensor PTC 1 kΩ / NTC
Coil unit weight (ex. cables) W kg 0.084 0.162 0.240 0.318
Coil unit length (ex. cables) L mm 78 138 198 258
Motor attraction force Fa N 0 0 0 0
Magnet pitch NN τ mm 30 30 30 30
Cable mass m kg/m 0.08 0.08 0.08 0.08
Cable type (power), length 1 m d mm (AWG) 5.3 (22)
Cable type (sensor), length 1 m d mm (AWG) 3.2 (26)

All specifications ±10%. Values assume a mounting surface at 20°C with the motor driven at maximum continuous current. Actual values depend on bus voltage.

Product Dimensions: UM Series – Ironless Linear Motors

Magnet Yoke Dimensions
Le (mm) 90 120 150 390
M4 bolts 3 4 6 13
Mass (kg/m) 4.8

Magnet yokes can be butted together.

Product Technical Drawings: UM Series – Ironless Linear Motors

UM Series - Ironless Linear Motors technical drawing