BLMC Series Linear Motor

Description

Design Features

  • Compact size for tight space constraints; 57.2 mm x 31.8 mm cross section
  • Continuous force to 184.0 N (41.4 lb); peak force to 736.0 N (165.5 lb)
  • Non-magnetic forcer coil provides high force with zero cogging for super-smooth velocity and position control
  • Optional cooling for higher rms force
  • Follows the 2011/65/EU RoHS 2 Directive

Aerotech's "U-channel" BLMC series compact linear motors are only 57.2 mm x 31.8 mm and are designed for high force in a compact package.

Ideal for both high-accuracy positioning and high-throughput applications, BLMC 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 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, BLMC motors are available with special high-power magnets that can increase output force.

The BLMC 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. BLMC 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 BLMC 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

BLMC Series Specifications

Motor Model
(P magnet track)
UnitsBLMC-92 BLMC-142 BLMC-192 BLMC-267
Performance Specifications(1,5)
Continuous Force, 1.4 bar
(20 psi)(2)
N (lb) 75.1 (16.9) 120.3 (27.0) 154.7 (34.8) 184.0 (41.4)
Continuous Force,
No Forced Cooling(2)
N (lb) 44.5 (10.0) 77.7 (17.5) 106.7 (24.0) 123.5 (27.8)
Peak Force(3) N (lb) 300.6 (67.6) 481.2 (108.2) 618.8 (139.1) 736.0 (165.5)
Electrical Specifications(5)
Winding Designation   -A -A -A -A
BEMF Constant
(Line-Line, Max)
V/(m/s)
(V/(in/s))
11.37 (0.29) 21.28 (0.54) 30.66 (0.78) 41.15 (1.05)
Continuous Current,
1.4 bar (20 psi)(2)
Apk
Arms
7.60
5.37
6.50
4.60
5.80
4.10
5.14
3.63
Continuous Current,
No Forced Cooling(2)
Apk
Arms
4.50
3.18
4.20
2.97
4.00
2.83
3.45
2.44
Peak Current, Stall(3) Apk
Arms
30.40
21.50
26.00
18.38
23.20
16.40
20.56
14.54
Force Constant, Sine Drive(4,8) N/Apk (lb/Apk) 9.89 (2.22) 18.51 (4.16) 26.67 (6.00) 35.80 (8.05)
N/Arms (lb/Arms) 13.98 (3.14) 26.17 (5.88) 37.72 (8.48) 50.63 (11.38)
Motor Constant(2,4) N/√W (lb/√W) 5.67 (1.27) 8.24 (1.85) 10.29 (2.31) 11.52 (2.59)
Resistance, 25°C (Line-Line) Ω 2.9 4.8 6.4 9.2
Inductance (Line-Line) mH 0.83 1.33 1.90 3.40
Thermal Resistance, 1.4 bar,
20 psi
°C/W 0.57 0.47 0.44 0.39
Thermal Resistance,
No Forced Cooling
°C/W 1.62 1.12 0.93 0.87
Maximum Bus Voltage VDC 340 340 340 340
Mechanical Specifications
Air Flow (20 psi) m3/s (SCFM) 1.4x10-3 (2.9) 1.7x10-3 (3.6) 1.4x10-3 (2.9) 1.5x10-3 (3.2)
Coil Weight kg (lb) 0.16 (0.35) 0.26 (0.57) 0.34 (0.75) 0.52 (1.14)
Coil Length mm (in) 91.0 (3.58) 142.0 (5.59) 192.0 (7.56) 267.0 (10.51)
Heat Sink mm (in) 250x250x25 (10x10x1) 250x250x25 (10x10x1) 250x250x25 (10x10x1) 250x250x25 (10x10x1)
Magnet Track Weight kg/m (lb/ft) 6.59 (4.42) 6.59 (4.42) 6.59 (4.42) 6.59 (4.42)
Magnetic Pole Pitch mm (in) 25 (0.98) 25 (0.98) 25 (0.98) 25 (0.98)
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)
UnitsBLMC-92 BLMC-142 BLMC-192 BLMC-267
Performance Specifications(1,5)
Continuous Force, 1.4 bar
(20 psi)(2)
N (lb) 54.1 (12.2) 86.6 (19.5) 111.4 (25.0) 132.5 (29.8)
Continuous Force,
No Forced Cooling(2)
N (lb) 32.0 (7.2) 56.0 (12.6) 76.8 (17.3) 88.9 (20.0)
Peak Force(3) N (lb) 216.4 (48.7) 346.5 (77.9) 445.5 (100.2) 529.9 (119.1)
Electrical Specifications(5)
Winding Designation   -A -A -A -A
BEMF Constant
(Line-Line, Max)
V/(m/s) (V/(in/s)) 8.18 (0.21) 15.32 (0.39) 22.07 (0.56) 29.63 (0.75)
Continuous Current, 1.4 bar,
20 psi(2)
Apk
Arms
7.60 (5.37) 6.50 (4.60) 5.80 (4.10) 5.14 (3.63)
Continuous Current,
No Forced Cooling(2)
Apk
Arms
4.50 (3.18) 4.20 (2.97) 4.00 (2.83) 3.45 (2.44)
Peak Current, Stall(3) Apk
Arms
30.40 (21.50) 26.00 (18.38) 23.20 (16.40) 20.56 (14.54)
Force Constant,
Sine Drive(4,8)
N/Apk (lb/Apk) 7.12 (1.60) 13.33 (3.00) 19.20 (4.32) 25.78 (5.79)
N/Arms (lb/Arms) 10.07 (2.26) 18.85 (4.24) 27.16 (6.11) 36.45 (8.20)
Motor Constant(2,4) N/√W (lb/√W) 4.08 (0.92) 5.94 (1.33) 7.41 (1.67) 8.29 (1.86)
Resistance, 25°C (Line-Line) Ω 2.9 4.8 6.4 9.2
Inductance (Line-Line) mH 0.83 1.33 1.90 3.40
Thermal Resistance, 1.4 bar,
20 psi
°C/W 0.57 0.47 0.44 0.39
Thermal Resistance,
No Forced Cooling
°C/W 1.62 1.12 0.93 0.87
Maximum Bus Voltage VDC 340 340 340 340
Mechanical Specifications
Air Flow, 20 psi m3/s (SCFM) 1.4x10-3 (2.9) 1.7x10-3 (3.6) 1.4x10-3 (2.9) 1.5x10-3 (3.2)
Coil Weight kg (lb) 0.16 (0.35) 0.26 (0.57) 0.34 (0.75) 0.52 (1.14)
Coil Length mm (in) 91.0 (3.58) 142.0 (5.59) 192.0 (7.56) 267.0 (10.51)
Heat Sink mm (in) 250x250x25 (10x10x1) 250x250x25 (10x10x1) 250x250x25 (10x10x1) 250x250x25 (10x10x1)
Magnet Track Weight kg/m (lb/ft) 7.11 (4.76) 7.11 (4.76) 7.11 (4.76) 7.11 (4.76)
Magnetic Pole Pitch mm (in) 25 (0.98) 25 (0.98) 25 (0.98) 25 (0.98)
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

  • BLMC

Ordering Information

BLMC Brushless Linear Servomotor

Option Description
BLMC-92 Linear motor forcer with thermistor; 92 mm long
BLMC-142 Linear motor forcer with thermistor; 142 mm long
BLMC-192 Linear motor forcer with thermistor; 192 mm long
BLMC-267 Linear motor forcer with thermistor;267 mm long

Winding Designation (Required)

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

Air Cooling (Required)

Option Description
-NC No air cooling fitting is installed
-ACC Air cooling, rear center fitting installed; not available with the -V option
-ACL Air cooling, rear left-side fitting installed; not available with the -V option
-ACR Air cooling, rear right-side fitting installed; not available with the -V option

Hall Effect Sensors (Required)

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

Preparation (Required)

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

Cable Length (Required)

Option Description
-750 750 mm length high-flex cables
-5000 5.0 m length high-flex cables

Magnet Tracks (Optional)

Option Decription
MTC150P "U" channel magnet track for use with BLMC-series forcers; 150 mm long
MTC250P "U" channel magnet track for use with BLMC-series forcers; 250 mm long
MTC350P "U" channel magnet track for use with BLMC-series forcers; 350 mm long
MTC450P "U" channel magnet track for use with BLMC-series forcers; 450 mm long
MTC500P "U" channel magnet track for use with BLMC-series forcers; 500 mm long
MTCxP "U" channel magnet track, for use with BLMC-series forcers; custom length
MTC150S "U" channel magnet track for use with BLMC-series forcers; 150 mm long. Magnets only on one side of track.
MTC250S "U" channel magnet track for use with BLMC-series forcers; 250 mm long. Magnets only on one side of track.
MTC350S "U" channel magnet track for use with BLMC-series forcers; 350 mm long. Magnets only on one side of track.
MTC450S "U" channel magnet track for use with BLMC-series forcers; 450 mm long. Magnets only on one side of track.
MTC500S "U" channel magnet track for use with BLMC-series forcers; 500 mm long. Magnets only on one side of track.
MTCxS "U" channel magnet track, for use with BLMC-series forcers; custom length. Magnets only on one side of track.
    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.