BLMH Series Linear Motor

Description

Design Features

  • 70% greater continuous output force in the same physical envelope than competitive models
  • Continuous forces up to 548.8 N (123.4 lb); peak forces to 2195 N (493.5 lb)
  • Special magnet options available for increased force output
  • 114.1 mm high x 50.8 mm wide cross section
  • Follows the 2011/65/EU RoHS 2 Directive

The BLMH series "U-channel" brushless linear servomotors offer over 70% greater continuous output force in the same physical envelope than similar models from other manufacturers. BLMH series motors feature a high-efficiency magnetic circuit design that provides continuous force ratings to 548.8 N (123.4 lb) and peak forces to 2195 N (493.5 lb). This extremely high level of performance can be enhanced with special magnet options that increase force further, thereby lowering heat generation.

BLMH series linear motors are direct drive and consist of a noncontact forcer assembly with Hall-effect devices, a thermal sensor, and "U-channel" magnet track. This design eliminates magnetic attraction to allow for extremely smooth motion and very tight velocity and position control. In addition, backlash, windup, wear and maintenance issues associated with ball screws, belts, and rack and pinions are eliminated.

The BLMH 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 speeds with high loads. BLMH 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 industrial usage.

The BLMH 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

BLMH Series Specifications

Motor ModelUnitsBLMH-142BLMH-202BLMH-262BLMH-322BLMH-382
Performance Specifications(1,5)
Continuous Force, 1.4 bar, 20 psi(2) N (lb) 270.7 (60.9) 351.2 (79.0) 437.1 (98.3) 489.2 (110.0) A B (opt)
435.8 (98.0) 548.8 (123.4)
Continuous Force, No Forced Cooling(2) N (lb) 150.0 (33.7) 194.2 (43.7) 266.2 (59.9) 303.2 (68.2) 357.9 (80.5)
Peak Force(3) N (lb) 1082.7 (243.4) 1404.9 (315.9) 1748.6 (393.1) 1956.7 (439.9) 2195.0 (493.5)
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))
32.11
(0.82)
64.22
(1.63)
47.50
(1.21)
95.00
(2.41)
64.42
(1.64)
128.85
(3.27)
79.20
(2.01)
158.40
(4.02)
45.71
(1.16)
91.42
(2.32)
Continuous Current, 1.4 bar, 20 psi(2) Apk
Arms
9.69
6.85
4.85
3.43
8.50 6.01 4.25
3.01
7.80
5.52
3.90
2.76
7.10
5.02
3.55
2.51
10.96 7.75 6.90
4.88
Continuous Current,
No Forced Cooling(2)
Apk
Arms
5.37
3.80
2.69
1.90
4.70
3.32
2.35
1.66
4.75
3.36
2.38
1.68
4.40
3.11
2.20
1.56
9.00
6.36
4.50
3.18
Peak Current, Stall(3) Apk
Arms
38.76
27.41
19.38
13.70
34.00
24.04
17.00
12.02
31.20
22.06
15.60
11.03
28.40
20.08
14.20
10.04
55.20
39.03
27.60
19.52
Force Constant, Sine Drive(4,8) N/Apk (lb/Apk) 27.93
(6.28)
55.87
(12.56)
41.32
(9.29)
82.64
(18.58)
56.04
(12.60)
112.09
(25.20)
68.90
(15.49)
137.80
(30.98)
39.77
(8.94)
79.53
(17.88)
N/Arms (lb/Arms) 39.50
(8.88)
79.01
(17.76)
58.44
(13.14)
116.88
(26.28)
79.26
(17.82)
158.52
(35.64)
97.44
(21.91)
194.88
(43.81)
56.24
(12.64)
112.47
(25.29)
Motor Constant(2,4) N/√W
(lb/√W)
14.17
(3.19)
17.20
(3.87)
20.24
(4.55)
22.29
(5.01)
23.19
(5.21)
Resistance, 25°C (Line-Line) Ω 3.7 14.8 5.5 22.0 7.3 29.2 9.1 36.4 2.8 11.2
Inductance (Line-Line) mH 2.40 9.60 3.80 15.20 4.60 18.40 6.00 24.00 1.80 7.20
Thermal Resistance, 1.4 bar,
20 psi
°C/W 0.27 0.24 0.21 0.21 0.18
Thermal Resistance,
No Forced Cooling
°C/W 0.89 0.78 0.58 0.54 0.42
Maximum Bus Voltage VDC 340 340 340 340 340
Mechanical Specifications
Air Flow (20 psi) m3/s
(SCFM)
2.5x10-3
(5.3)
2.8x10-3
(5.9)
2.8x10-3
(5.9)
2.9x10-3
(6.2)
2.7x10-3
(5.8)
Coil Weight kg (lb) 1.10 (2.42) 1.60 (3.52) 2.10 (4.62) 2.60 (5.72) 3.10 (6.82)
Coil Length mm (in) 142.0 (5.59) 202.0 (7.95) 262.0 (10.31) 322.0 (12.68) 382.0 (15.04)
Heat Sink mm
(in)
250x250x25
(10x10x1)
250x250x25
(10x10x1)
250x250x25
(10x10x1)
250x400x25
(10x16x1)
250x400x25
(10x16x1)
Magnet Track Weight kg/m (lb/ft) 20.4 (13.68)
Magnetic Pole Pitch mm (in) 30.00 (1.18)
Standards   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.
  • blmhspecimage

Dimensions

  • BLMH

Ordering Information

BLMH Brushless Linear Servomotor

Option Description
BLMH-142 Linear motor forcer with thermistor; 142 mm long
BLMH-202 Linear motor forcer with thermistor; 202 mm long
BLMH-262 Linear motor forcer with thermistor; 262 mm long
BLMH-322 Linear motor forcer with thermistor; 322 mm long
BLMH-382 Linear motor forcer with thermistor; 382 mm long

Winding Designation (Required)

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

Air Cooling (Required)

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

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 for 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 Description
MTH360 "U" channel magnet track for use with BLMH-series forcers; 360 mm long
MTH480 "U" channel magnet track for use with BLMH-series forcers; 480 mm long
MTH600 "U" channel magnet track for use with BLMH-series forcers; 600 mm long
MTHx “U” channel magnet track for use with BLMH-series forcers; 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.