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

Ordering Example

BLMH-142-A -AC -NH -S -750 MTH360

Ordering Options

Series Air CoolingHall EffectPreparationCable LengthMagnet Track
BLMH-142-A
BLMH-202-A
BLMH-262-A
BLMH-322-A
BLMH-382-A
BLMH-x-x
-AC
-NC
-H
-NH
-S
-V
-UHV
-750
-5000
MTH360
MTH480
MTH600
MTHx

BLMH Brushless Linear Servomotor

Option Description
BLMH-142 Linear motor forcer with hall effect sensors and thermistor, includes air fitting, 270 N (60 lb) continuous force at 20 psi
BLMH-202 Linear motor forcer with hall effect sensors and thermistor, includes air fitting, 351 N (79 lb) continuous force at 20 psi
BLMH-262 Linear motor forcer with hall effect sensors and thermistor, includes air fitting, 437 N (98 lb) continuous force at 20 psi
BLMH-322 Linear motor forcer with hall effect sensors and thermistor, includes air fitting, 489.2 N (110.0 lb) continuous force at 20 psi
BLMH-382 Linear motor forcer with hall effect sensors and thermistor, includes air fitting, 548 N (123 lb) continuous force at 20 psi
BLMH-x-x Linear motor forcer with hall effect sensors and thermistor, includes air fitting

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
MTH360 "U" channel magnet track for use with BLMH-series forcers, 360 mm (14.2 in) length
MTH480 "U" channel magnet track for use with BLMH-series forcers, 480 mm (18.9 in) length
MTH600 "U" channel magnet track for use with BLMH-series forcers, 600 mm (23.6 in) length
MTHx Custom "U" channel magnet track for use with BLMH-series forcers