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 Model | Units | BLMH-142 | BLMH-202 | BLMH-262 | BLMH-322 | BLMH-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 | ||||||||||
- Performance is dependent upon heat sink configuration, system cooling conditions, and ambient temperature.
- Values shown @ 100°C rise above a 25°C ambient temperature, with motor mounted to the specified aluminum heat sink.
- Peak force assumes correct rms current; consult Aerotech.
- Force constant and motor constant specified at stall.
- All performance and electrical specifications ±10%.
- Maximum winding temperature is 125°C.
- Ambient operating temperature range 0°C - 25°C. Consult Aerotech for performance in elevated ambient temperatures.
- All Aerotech amplifiers are rated Apk; use force constant in N/Apk when sizing.
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blmhspecimage 
Dimensions
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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 |
|---|---|
| MTH180P | "U" channel magnet track for use with BLMH-series forcers; 180 mm long |
| MTH210P | "U" channel magnet track for use with BLMH-series forcers; 210 mm long |
| MTH240P | "U" channel magnet track for use with BLMH-series forcers; 240 mm long |
| MTH300P | "U" channel magnet track for use with BLMH-series forcers; 300 mm long |
| MTH330P | "U" channel magnet track for use with BLMH-series forcers; 330 mm long |
| MTH360P | "U" channel magnet track for use with BLMH-series forcers; 360 mm long |
| MTH480P | "U" channel magnet track for use with BLMH-series forcers; 480 mm long |
| MTH600P | "U" channel magnet track for use with BLMH-series forcers; 600 mm long |
| MTH720P | "U" channel magnet track for use with BLMH-series forcers; 720 mm long |
| MTHxP | “U” channel magnet track for use with BLMH-series forcers; custom length |
- Note: Magnet tracks are ordered as separate line items. Magnet track part numbers ending in "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.
| 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. |