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

    Ordering Information

    BLM Brushless Linear Servomotor

    Option Description
    BLM-142 Linear motor forcer with thermistor; 142 mm long
    BLM-203 Linear motor forcer with thermistor; 203 mm long
    BLM-264 Linear motor forcer with thermistor; 264 mm long
    BLM-325 Linear motor forcer with thermistor; 325 mm long
    BLM-386 Linear motor forcer with thermistor; 386 mm long
    BLM-x Linear motor forcer with thermistor; custom length

    Winding

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

    Air Cooling

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

    Hall Effect

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

    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 length high-flex cables
    -5000 5.0 meter length high-flex cables

    Magnet Tracks

    Option Description
    MT180P "U" channel magnet track for use with BLM-series forcers, 180 mm long
    MT240P "U" channel magnet track for use with BLM-series forcers, 240 mm long
    MT300P "U" channel magnet track for use with BLM-series forcers, 300 mm long
    MT330P "U" channel magnet track for use with BLM-series forcers, 330 mm long
    MT360P "U" channel magnet track for use with BLM-series forcers, 360 mm long
    MT420P "U" channel magnet track for use with BLM-series forcers, 420 mm long
    MT540P "U" channel magnet track for use with BLM-series forcers, 540 mm long
    MT480P "U" channel magnet track for use with BLM-series forcers, 480 mm long
    MT600P "U" channel magnet track for use with BLM-series forcers, 600 mm long
    MTxP "U" channel magnet track for use with BLM-series forcers; custom length
    MT240S "U" channel magnet track for use with BLM-series forcers, 240 mm long
    MT300S "U" channel magnet track for use with BLM-series forcers, 300 mm long
    MT360S "U" channel magnet track for use with BLM-series forcers, 360 mm long
    MT420S "U" channel magnet track for use with BLM-series forcers, 420 mm long
    MT540S "U" channel magnet track for use with BLM-series forcers, 540 mm long
    MT480S "U" channel magnet track for use with BLM-series forcers, 480 mm long
    MT600S "U" channel magnet track for use with BLM-series forcers, 600 mm long
    MTxS "U" channel magnet track for use with BLM-series forcers; custom length
      Note: Magnet tracks are ordered as separate line items. Magnet track part numbers ending with “P” are high performance grade, including magnets on both sides of the track. Magnet track numbers ending with “S” are standard performance grade, including magnets on a single side of the track.

    Integration (Required)

    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 that ship together. This is typically used for spare parts, replacement parts, or items that will not be used together. These components may or may not be part of a larger system.