BLM Series Linear Motor

Description

Design Features

  • High output force in an 86.4 mm x 34.3 mm cross section
  • Continuous force to 397.6 N (89.4 lb); peak force to 1590.4 N (357.5 lb)
  • High-energy rare-earth magnets used in magnet tracks for high acceleration capability
  • Non-magnetic forcer provides high force with zero cogging for super-smooth velocity and position control
  • Follows the 2011/65/EU RoHS 2 Directive

Aerotech's "U-channel" BLM series linear motors are 86.4 mm x 34.3 mm in cross section and have proven ideal for both high-accuracy and high-throughput applications.

BLM series motors are direct drive and consist of a noncontacting forcer and "U-channel" rare-earth magnet track. This design eliminates backlash, windup, wear and maintenance issues associated with ball screws, belts, and rack and pinions.

The noncontact design of the forcer and magnet track results in a maintenance-free system.

The compact forcer assembly contains Hall-effect devices, and a thermal sensor, and is constructed of reinforced ceramic epoxy. This ironless design eliminates eddy-current losses that otherwise would limit speed and produce additional heat. For highest rms force, optional air cooling is available. Offering high peak forces in its standard configuration, BLM motors are available with special high-power magnets that can increase output force.

The BLM series nonmagnetic forcer eliminates cogging and magnetic attraction to allow for extremely smooth motion and very tight velocity and position control. These linear motors are ideal for any application that requires high levels of positioning resolution and accuracy. BLM series linear motors are forgiving to align, easy to assemble, and keep the magnetic field well-contained. Magnet tracks are stackable for any travel length. They are also suited for cleanroom use as they produce no particulates.

The BLM 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

BLM Series Specifications

MOTOR MODEL
(P Magnet Track)
UNITSBLM-142BLM-203BLM-264BLM-325BLM-386
PERFORMANCE SPECIFICATIONS (1,5)
Continuous Force, 1.4 bar, 20 psi(2) N (lb) A B (opt) 251.6 (56.6) 301.7 (67.8) 332.2 (74.7) 397.6 (89.4)
173.2 (38.9) 158.7 (35.7)
Continuous Force, No Forced Cooling(2) N (lb) 110.5 (24.8) 153.3 (34.5) 197.2 (44.3) 230.7 (51.9) 257.3 (57.8)
Peak Force(3) N (lb) 692.7 (155.7) 1006.4 (226.3) 1206.6 (271.3) 1328.6 (298.7) 1590.4 (357.5)
ELECTRICAL SPECIFICATIONS(5)
Winding Designation   A B (opt) A B (opt) A B (opt) A B (opt) A B (opt)
BEMF Constant (Line-Line, Max) V/(m/s)
(V/(in/s))
40.96
(1.04)
20.48
(0.52)
33.24
(0.84)
66.49
(1.69)
44.46
(1.13)
88.91
(2.26)
53.03
(1.35)
106.06
(2.69)
67.21
(1.71)
134.42
(3.41)
Continuous Current, 1.4 bar, 20 psi(2) Apk
Arms
4.86
3.44
8.91
6.30
8.70
6.15
4.35
3.08
7.80
5.52
3.90
2.76
7.20
5.09
3.60
2.55
6.80
4.81
3.40
2.40
Continuous Current, No Forced Cooling(2) Apk
Arms
3.10
2.19
6.20
4.38
5.30
3.75
2.65
1.87
5.10
3.61
2.55
1.80
5.00
3.54
2.50
1.77
4.40
3.11
2.20
1.56
Peak Current, Stall(3) Apk
Arms
19.44
13.75
38.88
27.49
34.80
24.61
17.40
12.30
31.20
22.06
15.60
11.03
28.80
20.36
14.40
10.18
27.20
19.23
13.60
9.62
Force Constant, Sine Drive(4,8) N/Apk (lb/Apk) 35.63
(8.01)
17.82
(4.01)
28.92 (6.50) 57.84
(13.00)
38.67
(8.69)
77.35
(17.39)
46.13
(10.37)
92.27
(20.74)
58.47
(13.15)
116.94
(26.29)
N/Arms (lb/Arms) 50.39
(11.33)
25.20
(5.66)
40.90
(9.19)
81.80
(18.39)
54.69
(12.30)
109.39
(24.59)
65.24
(14.67)
130.48
(29.34)
82.69
(18.59)
165.38
(37.18)
Motor Constant(2,4) N/√W
(lb/√W)
10.53
(2.37)
14.11
(3.17)
16.39
(3.69)
17.66
(3.97)
20.17
(4.54)
Resistance, 25°C (Line-Line) Ω 10.9 2.7 4.0 16.0 5.3 21.2 6.5 26.0 8.0 32.0
Inductance
(Line-Line)
mH 8.70 2.18 3.20 12.80 4.20 16.80 5.20 20.80 6.20 24.80
Thermal Resistance, 1.4 bar, 20 psi °C/W 0.37 0.31 0.30 0.28 0.26
Thermal Resistance, No Forced Cooling °C/W 0.91 0.85 0.69 0.59 0.61
Maximum Bus Voltage VDC 340 340 340 340 340
MECHANICAL SPECIFICATIONS
Air Flow, 20 psi m3/s
(SCFM)
1.7x10-3
(3.5)
1.5x10-3
(3.2)
1.6x10-3
(3.3)
1.6x10-3
(3.3)
1.6x10-3
(3.4)
Coil Weight kg (lb) 0.60 (1.32) 0.90 (1.98) 1.10 (2.42) 1.40 (3.08) 1.70 (3.74)
Coil Length mm (in) 143.8 (5.66) 204.7 (8.06) 265.7 (10.46) 326.6 (12.86) 387.6 (15.26)
Heat Sink Area mm
(in)
250x250x25
(10x10x1)
250x250x25
(10x10x1)
250x250x25
(10x10x1)
250x400x25
(10x16x1)
250x400x25
(10x16x1)
Magnet Track Weight kg/m (lb/ft) 10.12 (6.79) 10.12 (6.79) 10.12 (6.79) 10.12 (6.79) 10.12 (6.79)
Magnetic Pole Pitch mm (in) 30.48 (1.20) 30.48 (1.20) 30.48 (1.20) 30.48 (1.20) 30.48 (1.20)
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.

 

    MOTOR MODEL
    (S magnet track)
    UNITSBLM-142BLM-203BLM-264BLM-325BLM-386
    PERFORMANCE SPECIFICATIONS (1,5)
    Continuous Force,
    1.4 bar, 20 psi(2)
    N (lb) A B (opt) 158.2 (35.6) 189.6 (42.6) 208.8 (46.9) 250.0 (56.2)
    108.9 (24.5) 99.8 (22.4)
    Continuous Force,
    No Forced Cooling(2)
    N (lb) 69.4 (15.6) 96.4 (21.7) 124.0 (27.9) 145.0 (32.6) 161.7 (36.4)
    Peak Force(3) N (lb) 435.5 (97.9) 632.7 (142.2) 758.6 (170.5) 835.3 (187.8) 999.8 (224.8)
    ELECTRICAL SPECIFICATIONS(5)
    Winding Designation   A B (opt) A B (opt) A B (opt) A B (opt) A B (opt)
    BEMF Constant
    (Line-Line, Max)
    V/(m/s)
    (V/(in/s))
    25.75
    (0.65)
    12.88
    (0.33)
    20.90
    (0.53)
    41.80
    (1.06)
    27.95
    (0.71)
    55.90
    (1.42)
    33.34
    (0.85)
    66.68
    (1.69)
    42.25
    (1.07)
    84.51
    (2.15)
    Continuous Current, 1.4 bar, 20 psi(2) Apk
    Arms
    4.86
    3.44
    8.91
    6.30
    8.70
    6.15
    4.35
    3.08
    7.80
    5.52
    3.90
    2.76
    7.20
    5.09
    3.60
    2.55
    6.80
    4.81
    3.40
    2.40
    Continuous Current, No Forced Cooling(2) Apk
    Arms
    3.10
    2.19
    6.20
    4.38
    5.30
    3.75
    2.65
    1.87
    5.10
    3.61
    2.55
    1.80
    5.00
    3.54
    2.50
    1.77
    4.40
    3.11
    2.20
    1.56
    Peak Current, Stall(3) Apk
    Arms
    19.44
    13.75
    38.88
    27.49
    34.80
    24.61
    17.40
    12.30
    31.20
    22.06
    15.60
    11.03
    28.80
    20.36
    14.40
    10.18
    27.20
    19.23
    13.60
    9.62
    Force Constant,
    Sine Drive(4,8)
    N/Apk (lb/Apk) 22.40
    (5.04)
    11.20
    (2.52)
    18.18
    (4.09)
    36.36
    (8.17)
    24.31
    (5.47)
    48.63
    (10.93)
    29.00
    (6.52)
    58.01
    (13.04)
    36.76
    (8.26)
    73.52
    (16.53)
    N/Arms (lb/Arms) 31.68
    (7.12)
    15.84
    (3.56)
    25.71
    (5.78)
    51.42
    (11.56)
    34.38
    (7.73)
    68.77
    (15.46)
    41.02
    (9.22)
    82.03
    (18.44)
    51.98
    (11.69)
    103.97
    (23.37)
    Motor Constant(2,4) N/√W
    (lb/√W)
    6.62
    (1.49)
    8.87
    (1.99)
    10.31
    (2.32)
    11.10
    (2.50)
    12.68
    (2.85)
    Resistance, 25°C (Line-Line) Ω 10.9 2.7 4.0 16.0 5.3 21.2 6.5 26.0 8.0 32.0
    Inductance (Line-Line) mH 8.70 2.18 3.20 12.80 4.20 16.80 5.20 20.80 6.20 24.80
    Thermal Resistance, 1.4 bar, 20 psi °C/W 0.37 0.31 0.30 0.28 0.26
    Thermal Resistance, No Forced Cooling °C/W 0.91 0.85 0.69 0.59 0.61
    Maximum Bus Voltage VDC 340 340 340 340 340
    MECHANICAL SPECIFICATIONS
    Air Flow, 20 psi m3/s
    (SCFM)
    1.7x10-3
    (3.5)
    1.5x10-3
    (3.2)
    1.6x10-3
    (3.3)
    1.6x10-3
    (3.3)
    1.6x10-3
    (3.4)
    Coil Weight kg (lb) 0.60 (1.32) 0.90 (1.98) 1.10 (2.42) 1.40 (3.08) 1.70 (3.74)
    Coil Length mm (in) 143.8 (5.66) 204.7 (8.06) 265.7 (10.46) 326.6 (12.86) 387.6 (15.26)
    Heat Sink Area mm
    (in)
    250x250x25
    (10x10x1)
    250x250x25
    (10x10x1)
    250x250x25
    (10x10x1)
    250x400x25
    (10x16x1)
    250x400x25
    (10x16x1)
    Magnet Track Weight kg/m (lb/ft) 10.92 (7.32) 10.92 (7.32) 10.92 (7.32) 10.92 (7.32) 10.92 (7.32)
    Magnetic Pole Pitch mm (in) 30.48 (1.20) 30.48 (1.20) 30.48 (1.20) 30.48 (1.20) 30.48 (1.20)
    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

    • BLM Series

    Ordering Information

    Ordering Example

    BLM-142-A -AC -H -S -750 MT240P

    Ordering Options

    Series Air CoolingHall EffectPreparationCable LengthMagnet Track
    BLM-142-A
    BLM-203-A
    BLM-264-A
    BLM-325-A
    BLM-386-A
    BLM-x-x
    -AC
    -NC
    -H
    -NH
    -S
    -V
    -UHV
    -750
    -5000
    MT240P
    MT300P
    MT360P
    MT420P
    MT480P
    MT600P
    MTxP
    MT240S
    MT300S
    MT360S
    MT420S
    MT480S
    MT600S
    MTxS

    BLM Brushless Linear Servomotor

    Option Description
    BLM-142 Linear motor forcer with thermistor, 110.5 N (24.8 lb) continuous force with no air and -P track, 64.4 N (15.6 lb) continuous force with no air and -S track
    BLM-203 Linear motor forcer with thermistor, 153.3 N (34.5 lb) continuous force with no air and -P track, 96.4 N (21.7 lb) continuous force with no air and -S track
    BLM-264 Linear motor forcer with thermistor, 197.2 N (44.3 lb) continuous force with no air and -P track, 124.0 N (27.9 lb) continuous force with no air and -S track
    BLM-325 Linear motor forcer with thermistor, 230.7 N (51.9 lb) continuous force with no air and -P track, 145 N (32.6 lb) continuous force with no air and -S track
    BLM-386 Linear motor forcer with thermistor, 257.3 N (57.8 lb) continuous force with no air and -P track, 161.7 N (36.4 lb) continuous force with no air and -S track
    BLM-x-x Linear motor forcer with thermistor

    Winding

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

    Air Cooling

    Option Description
    -AC Includes air cooling fitting
    -NC No air cooling fitting is installed

    Hall Effect

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

    Preparation

    Option Description
    -S Standard preparation
    -V Vacuum preparation for 10-6 Torr
    -UHV Ultra-high vacuum preparation, contact factory

    Cable Length

    Option Description
    -750 750 mm high-flex cable
    -5000 5.0 meter high-flex cable

    Magnet Tracks

    Option Description
    MT240P High performance "U" channel magnet track for use with BLM-series forcers, 244 mm (9.6 in) length
    MT300P High performance "U" channel magnet track for use with BLM-series forcers, 305 mm (12.0 in) length
    MT360P High performance "U" channel magnet track for use with BLM-series forcers, 366 mm (14.4 in) length
    MT420P High performance "U" channel magnet track for use with BLM-series forcers, 427 mm (16.8 in) length
    MT480P High performance "U" channel magnet track for use with BLM-series forcers, 487 mm (19.2 in) length
    MT600P High performance "U" channel magnet track for use with BLM-series forcers, 610 mm (24.0 in) length
    MTxP High performance Custom "U" channel magnet track for use with BLM-series forcers
    MT240S High performance "U" channel magnet track for use with BLM-series forcers, 244 mm (9.6 in) length. Magnets on only one side of track.
    MT300S High performance "U" channel magnet track for use with BLM-series forcers, 305 mm (12.0 in) length. Magnets on only one side of track.
    MT360S High performance "U" channel magnet track for use with BLM-series forcers, 366 mm (14.4 in) length. Magnets on only one side of track.
    MT420S High performance "U" channel magnet track for use with BLM-series forcers, 427 mm (16.8 in) length. Magnets on only one side of track.
    MT480S High performance "U" channel magnet track for use with BLM-series forcers, 487 mm (19.2 in) length. Magnets on only one side of track.
    MT600S High performance "U" channel magnet track for use with BLM-series forcers, 610 mm (24.0 in) length. Magnets on only one side of track.
    MTxS High performance custom "U" channel magnet track for use with BLM-series forcers. Magnets on only one side of track.