Design Features

The BLMSC linear motor is Aerotech’s smallest “U-channel” linear motor measuring only 37.5 mm x 22 mm in cross section. With a high power density and force output, the BLMSC is ideally suited for space-constrained applications requiring high-acceleration or high force output.

The motor consists of a noncontact forcer coil assembly with thermal sensor, optional Hall-effect devices, and “U-channel” magnet track. The design eliminates backlash, windup, wear, and maintenance issues associated with ball-screws, belts, and rack and pinions.

The moving forcer coil assembly is a compact, reinforced ceramic-epoxy structure. The ironless design eliminates cogging and eddy-current losses that otherwise would limit speed and produce additional heat.

These linear motors are ideal for any application that requires high levels of positioning resolution and accuracy. BLMSC 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 BLMSC can be driven using standard Aerotech brushless amplifiers and controllers to provide a complete integrated system.

blmsc

Specifications

BLMSC Series Specifications

Motor ModelUnitsBLMSC-79-ABLMSC-111-ABLMSC-143-A
Performance Specifications(1,2)
Continuous Force(3)N (lb)14 (3.1)20.8 (4.7)27.7 (6.2)
Peak Force(4)N (lb)55.9 (12.6)83.3 (18.7)110.9 (24.9)
Electrical Specifications(2)
Winding Designation
-A-A-A
BEMF Constant (Line to Line, Max)V/m/s
(V/(in/s))		5.5 
(0.14)		9.2 
(0.23)		12.9 
(0.31)
Continuous Current(3)Apk
Arms		2.97 
2.1		2.67 
1.89		2.59 
1.83
Peak Current, Stall(4)Apk
Arms		11.88
8.4		10.68 
7.55		10.36 
7.33
Force Constant, Sine Drive(5,6)N/Apk (lb/Apk)4.7 (1.06)7.8 (1.75)10.7 (2.41)
N/Arms(lb/Arms)6.65 (1.49)11.03 (2.48)15.14 (3.40)
Motor Constant(3,5)N/√W (lb/√W)2.26 (0.51)2.91 (0.65)3.4 (0.76)
Resistance, 25°C (Line to Line)Ω4.16.89.4
Inductance (Line to Line)mH0.591.021.45
Thermal Resistance°C/W2.631.951.51
Maximum Bus VoltageVDC340
Mechanical Specifications
Coil Weightkg (lb)0.09 (0.20)0.13 (0.29)0.16 (0.35)
Coil Lengthmm (in)79 (3.11)111 (4.37)143 (5.63)
Heat Sinkmm (in)250x250x25 (10x10x1)
Magnet Track Weightkg/m (lb/ft)2.81 (1.88)
Magnetic Pole Pitchmm (in)16.0 (0.63)
Standards
2011/65/EU RoHS 2 Directive

  1. Performance is dependent upon heat sink configuration, system cooling conditions, and ambient temperature.

  2. All performance and electrical specifications ±10%.

  3. Values shown @ 100°C rise above a 25°C ambient temperature, with motor mounted to the specified aluminum heat sink.

  4. Peak force assumes correct rms current; consult Aerotech.

  5. Force constant and motor constant specified at stall.

  6. All Aerotech amplifiers are rated Apk; use force constant in N/Apk when sizing.

  7. Maximum winding temperature is 125°C.

  8. Ambient operating temperature range 0°C - 25°C. Consult Aerotech for performance in elevated ambient temperatures.

Dimensions

Ordering Information

BLMSC Brushless Linear Servomotor

OptionDescription
BLMSC-79Linear motor forcer with thermistor, 79 mm long
BLMSC-111Linear motor forcer with thermistor, 111 mm long
BLMSC-143Linear motor forcer with thermistor, 143 mm long

Winding Designation (Required)

OptionDescription
-A76 cm (2.5 ft) flying leads (standard)

Air Cooling (Required)

OptionDescription
-NCNo air cooling (standard)

Hall Effect Sensors (Required)

OptionDescription
-HHall effect sensors included
-NHNo Hall effect sensors included

Preparation (Required)

OptionDescription
-SStandard preparation
-VVacuum preparation to 10-6 Torr
-UHVUltra-high vacuum preparation; contact factory

Cable Length (Required)

OptionDescription
-750750 mm high-flex cables
-50005.0 m high-flex cables

Magnet Tracks

OptionDescription
MTSC64P"U" channel magnet track for use with BLMSC-series forcers; 64 mm long
MTSC96P"U" channel magnet track for use with BLMSC-series forcers; 96 mm long
MTSC112P“U” channel magnet track for use with BLMSC series forcers; 112 mm long
MTSC128P"U" channel magnet track for use with BLMSC-series forcers; 128 mm long
MTSC144P“U” channel magnet track for use with BLMSC series forcers; 144 mm long
MTSC160P"U" channel magnet track for use with BLMSC-series forcers; 160 mm long
MTSC192P"U" channel magnet track for use with BLMSC-series forcers; 192 mm long
MTSC224P"U" channel magnet track for use with BLMSC-series forcers; 224 mm long
MTSC256P"U" channel magnet track for use with BLMSC-series forcers; 256 mm long
MTSC288P"U" channel magnet track for use with BLMSC-series forcers; 288 mm long
MTSC352P"U" channel magnet track for use with BLMSC-series forcers; 352 mm long
MTSC400P“U” channel magnet track for use with BLMSC series forcers; 400 mm long
MTSC416P"U" channel magnet track for use with BLMSC-series forcers; 416 mm long
MTSCxP"U" channel magnet track for use with BLMSC-series forcers; custom length

  1. 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.

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.

OptionDescription
-TASIntegration - 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.
-TACIntegration - 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.