BLMF Series (Steel Laminated) Linear Motor

Description

Design Features

  • Slotless magnetic forcer to improve force production with reduced cogging
  • Continuous force to 159.4 N (35.8 lb); peak force to 637.7 N (143.4 lb)
  • Unlimited travel length by stacking magnet tracks
  • High-energy, rare-earth magnets used in magnet track for high acceleration capability
  • Follows the 2011/65/EU RoHS 2 Directive

The BLMF series linear motors are designed to provide a lower cost and lower profile alternative to conventional linear motor applications. The BLMFS series utilizes steel laminations to produce more force for a given forcer coil length. This makes it ideal for high speed point-to-point motion. The attraction force can also be used as a bearing pre-load.

The forcer assembly contains Hall-effect devices, and a thermal sensor, and is a compact, reinforced ceramic epoxy structure.

Offering high peak forces in its standard configuration, BLMF motors are available with higher-power magnets that can be used to increase output force.

These linear motors are ideal for any application requiring high levels of positioning resolution and accuracy. Tracks are stackable for any travel length. The BLMF linear motors are also for cleanroom use as they produce no particulates.

The BLMF can be driven using standard Aerotech brushless amplifiers and controllers to provide a complete, integrated system.

Need help sizing your motor? Try Aerotech's Motor Sizer software to specify the ideal motor for your application.

Specifications

BLMFS "Steel Laminated" Forcer Models

Motor ModelUnitsBLMFS-81BLMFS-142BLMFS-264BLMFS-325BLMFS-386
Performance Specifications(1,5)
Continuous
Force, No Forced Cooling(2)
N (lb) 34.0 (7.6) 58.3 (13.1) 117.8 (26.5) 163.2 (36.7) 193.4 (43.5)
Peak Force(3) N (lb) 136.0 (30.6) 233.1 (52.4) 471.3 (106.0) 652.6 (146.7) 773.5 (173.9)
Attraction Force N (lb) 197 (44) 341 (77) 628 (141) 787 (177) 925 (208)
Electrical Specifications(5)
Winding Designation   A B A B A B A B A B
BEMF Constant (Line-Line, Max) V/(m/s)
(V/(in/s))
13.02 (0.33) 6.51 (0.17) 24.81 (0.63) 12.40 (0.32) 26.05 (0.66) 52.10 (1.32) 33.49 (0.85) 66.98 (1.70) 39.69 (1.01) 79.39 (2.02)
Continuous
Current, No Forced Cooling(2)
Apk
Arms
3.00 2.12 6.00
4.24
2.70 1.91 5.40
3.82
5.20 3.68 2.60
1.84
5.60 3.96 2.80
1.98
5.60 3.96 2.80
1.98
Peak Current, Stall(3) Apk
Arms
12.00 8.49 24.00
16.97
10.80 7.64 21.60
15.27
20.80 14.71 10.40
7.35
22.40 15.84 11.20
7.92
22.40 15.84 11.20
7.92
Force Constant,
Sine Drive(4,8)
N/Apk (lb/Apk) 11.33 (2.55) 5.67 (1.27) 21.58
(4.85)
10.79
(2.43)
22.66
(5.09)
45.32
(10.19)
29.14
(6.55)
58.27
(13.10)
34.53
(7.76)
69.06
(15.53)
N/Arms (lb/Arms) 16.02 (3.60) 8.01
(1.80)
30.52
(6.86)
15.26
(3.43)
32.05
(7.20)
64.09
(14.41)
41.20
(9.26)
82.41
(18.53)
48.83
(10.98)
97.67
(21.96)
Motor Constant(2,4) N/√W
(lb/√W)
4.71
(1.06)
6.38
(1.43)
9.61
(2.16)
11.15
(2.51)
11.91
(2.68)
Resistance, 25°C (Line-Line) Ω 5.5 1.4 10.9 2.7 5.3 21.2 6.5 26.0 8.0 32.0
Inductance
(Line-Line)
mH 4.50 1.13 10.40 2.60 5.70 22.80 7.40 29.60 8.75 35.00
Thermal Resistance, No Forced Cooling °C/W 1.92 1.20 0.66 0.47 0.38
Maximum Bus Voltage VDC 340 340 340 340 340
Mechanical Specifications
Coil Weight kg (lb) 0.60 (1.32) 1.02 (2.24) 1.90 (4.18) 2.31 (5.08) 2.76 (6.07)
Coil Length mm (in) 81.0 (3.19) 142.2 (5.60) 264.2 (10.40) 325.1 (12.80) 386.1 (15.20)
Heat Sink mm
(in)
100x100x13
(4x4x0.5)
150x150x13 (6x6x0.5) 300x300x13 (12x12x0.5) 350x350x13 (14x14x0.5) 400x400x13 (16x16x0.5)
Magnet Track Weight kg/m (lb/ft) 4.70
(3.15)
Magnetic Pole Pitch mm (in) 30.00 (1.18) 30.00 (1.18) 30.00 (1.18) 30.00 (1.18) 30.00 (1.18)
Standards   2011/65/EU RoHS 2 Directive
  1. Performance is dependent upon heat sink configuration, system cooling conditions, and ambient temperature.
  2. Values shown @ 100°C rise above a 25°C ambient temperature, with motor mounted to the specified aluminum heat sink.
  3. Peak force assumes correct rms current; consult Aerotech.
  4. Force constant and motor constant specified at stall.
  5. All performance and electrical specifications ±10%.
  6. Maximum winding temperature is 125°C.
  7. Ambient operating temperature range 0°C - 25°C. Consult Aerotech for performance in elevated ambient temperatures.
  8. All Aerotech amplifiers are rated Apk; use force constant in N/Apk when sizing.

Dimensions

  • BLMF

Ordering Information

BLMF Brushless Linear Servo Motor

Option Description
BLMFS-81 Flat linear motor forcer, steel laminations for higher force with thermistor; 81 mm long
BLMFS-142 Flat linear motor forcer, steel laminations for higher force with thermistor; 142 mm long
BLMFS-264 Flat linear motor forcer, steel laminations for higher force with thermistor; 264 mm long
BLMFS-325 Flat linear motor forcer, steel laminations for higher force with thermistor; 325 mm long
BLMFS-386 Flat linear motor forcer, steel laminations for higher force with thermistor; 386 mm long

Winding Designation (Required)

Option Description
-A 76 cm (2.5 ft) flying leads (standard)
-B Optional winding

Hall Effect Sensors (Required)

Option Description
-H Hall effect sensors included
-NH No hall effect sensors included

Vacuum Preparation (Optional)

Option Description
-V Vacuum preparation to 10-6 Torr
-UHV Ultra-high vacuum preparation; contact factory
    Note: Vacuum preparation motors are ordered as an Engineering Special line item

Flat Magnet Tracks (Optional)

Option Description
MTF240P Flat magnet track, for use with BLMFI or BLMFS forcer coil, 240 mm long
MTF360P Flat magnet track, for use with BLMFI or BLMFS forcer coil, 360 mm long
MTF480P Flat magnet track, for use with BLMFI or BLMFS forcer coil, 480 mm long
MTFxxxP Flat magnet track length available; custom length
    Note: Magnet tracks are ordered as separate line items.

Integration

Aerotech offers both standard and custom integration services to help you get your system fully operational as quickly as possible. The following standard integration options are available for this system. Please consult Aerotech if you are unsure what level of integration is required, or if you desire custom integration support with your system.

Option Description
-TAS Integration - Test as system
Testing, integration, and documentation of a group of components as a complete system that will be used together (ex: drive, controller, and stage). This includes parameter file generation, system tuning, and documentation of the system configuration.
-TAC Integration - Test as components
Testing and integration of individual items as discrete components. This is typically used for spare parts, replacement parts, or items that will not be used or shipped together (ex: stage only). These components may or may not be part of a larger system.