BM Series Brushless Rotary Motors
Our BM servomotors use permanent rare-earth magnets with a skewed, low-inertia rotor design to deliver high torque output, excellent torque-to-inertia ratio, minimal torque ripple and smooth velocity performance. Unlike DC brush-type servomotors, BM motors feature a low-maintenance brushless design, making them ideal for critical applications that cannot tolerate downtime.
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Request a Quote- Description
- Specifications
- Dimensions
- Ordering Info
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Description
Design Features
- Available in 8 models with torque ranging from 0.17 N·m to 27.6 N·m
- Configurable with optional fail-safe holding brake
- Features optional IP65-level construction for use in harsh environments
- Available in standard NEMA frame sizes
- Follows the EU 2015/863 RoHS 3 directive
Wide Torque Range
The BM motor series covers a wide range of torque and package sizes. Continuous output torque ranges from 0.16 N·m (22.5 oz·in) to 31.6 N·m (280 lb·in), with peak torques to 94.9 N·m (840 lb·in). Standard frame sizes include NEMA 17, 23, 34, 42 and 56. This makes it easy to mount any motor to Aerotech’s gearbox line with no adapter plates. These motors are well-suited to general purpose and high-end servo applications.
Application Flexibility
The standard motor has a 1000-line encoder (4000-line count after quadrature), RS-422 line driver output with Hall effect device outputs for commutation, and MS connectors. Options include increased encoder resolution, sealing for IP65 level protection, brakes, and gearboxes. Standard models can be delivered from stock and custom variations can be engineered to your requirements with minimal lead time.
Specifications
BM Performance Specifications
| BM24 | BM75 | BM130 | BM200 | BM250 | BM500 | BM800 | BM1400 | |
|---|---|---|---|---|---|---|---|---|
| Stall Torque, Continuous-N·m(1)(2)(3) | 0.17 N·m | 0.51 N·m | 1.02 N·m | 1.45 N·m | 2.3 N·m | 3.6 N·m | 6.1 N·m | 11.0 N·m |
| Peak Torque-N·m(1)(2)(4) | 0.51 N·m | 1.3 N·m | 2.5 N·m | 3.6 N·m | 5.7 N·m | 9.1 N·m | 15.3 N·m | 27.6 N·m |
| Rated Speed(1)(2) | 3000 rpm | 4000 rpm | 3000 rpm | |||||
| Rated Power Output, Continuous(1)(2) | 53 W | 192 W | 333 W | 455 W | 739 W | 1065 W | 1446 W | 2529 W |
BM Electrical Specifications
| BM24 | BM75 | BM130 | BM200 | BM250 | BM500 | BM800 | BM1400 | |
|---|---|---|---|---|---|---|---|---|
| BEMF Constant (Line-Line, Max) | 6.6 Vpk/krpm | 9 Vpk/krpm | 19 Vpk/krpm | 18 Vpk/krpm | 28 Vpk/krpm | 29 Vpk/krpm | 69 Vpk/krpm | |
| Continuous Current, Stall-Apk (1)(2) | 3.1 Apk | 9.0 Apk | 6.9 Apk | 10.3 Apk | 17.5 Apk | 11.9 Apk | 20.5 Apk | |
| Continuous Current, Stall-Arms (1)(2) | 2.2 Arms | 6.4 Arms | 4.9 Arms | 7.3 Arms | 7.2 Arms | 12.4 Arms | 8.4 Arms | 14.5 Arms |
| Peak Current, Stall-Apk (1)(3) | 9.3 Apk | 22.5 Apk | 17.3 Apk | 25.8 Apk | 25.6 Apk | 43.8 Apk | 29.8 Apk | 51.3 Apk |
| Peak Current, Stall-Arms (1)(3) | 6.6 Arms | 15.9 Arms | 12.2 Arms | 18.2 Arms | 18.1 Arms | 30.9 Arms | 21.0 Arms | 36.2 Arms |
| Torque Constant-N·m/Apk (1)(4) | 0.055 N·m/Apk | 0.06 N·m/Apk | 0.15 N·m/Apk | 0.14 N·m/Apk | 0.22 N·m/Apk | 0.21 N·m/Apk | 0.51 N·m/Apk | 0.54 N·m/Apk |
| Torque Constant-N·m/Arms(2)(5) | 0.078 N·m/Arms | 0.08 N·m/Arms | 0.21 N·m/Arms | 0.20 N·m/Arms | 0.31 N·m/Arms | 0.29 N·m/Arms | 0.73 N·m/Arms | 0.76 N·m/Arms |
| Motor Constant-N·m/√W(2)(4) | 0.054 N·m/√W | 0.055 N·m/√W | 0.101 N·m/√W | 0.131 N·m/√W | 0.206 N·m/√W | 0.287 N·m/√W | 0.451 N·m/√W | 0.745 N·m/√W |
| Resistance, 25°C (Line-Line)(1) | 1.07 Ω | 1.0 Ω | 2.0 Ω | 1.1 Ω | 0.5 Ω | 1.2 Ω | 0.5 Ω | |
| Inductance (Line-Line)(1) | 0.75 mH | 1.42 mH | 3.52 mH | 2.18 mH | 2.74 mH | 1.42 mH | 3.8 mH | 1.7 mH |
| Maximum Bus Voltage(1) | 80 VDC | 340 VDC | ||||||
| Thermal Resistance(1) | 7.47 °C/W | 1.18 °C/W | 1.04 °C/W | 0.81 °C/W | 0.82 °C/W | 0.61 °C/W | 0.60 °C/W | 0.54 °C/W |
| Number of Poles(1) | 6 | 8 | ||||||
BM Specifications
| BM24 | BM75 | BM130 | BM200 | BM250 | BM500 | BM800 | BM1400 | |
|---|---|---|---|---|---|---|---|---|
| Frame Size | NEMA 17 | NEMA 23 | NEMA 34 | NEMA 42 | ||||
| Mass | 0.8 kg | 1.1 kg | 1.5 kg | 2.0 kg | 3.6 kg | 5.0 kg | 6.6 kg | 10.7 kg |
| Mass with Brake | 1.0 kg | 1.7 kg | 2.1 kg | 2.6 kg | 4.4 kg | 5.8 kg | 8.1 kg | 12.2 kg |
| Rotor Moment of Inertia | 6.00x10-6 kg·m 2 | 5.91x10-6 kg·m 2 | 1.00x10-5 kg·m 2 | 1.30x10-5 kg·m 2 | 4.08x10-5 kg·m 2 | 7.57x10-5 kg·m 2 | 2.44x10-4 kg·m 2 | 5.60x10-4 kg·m 2 |
| Max Radial Load-N | 28 N | 89 N | 178 N | 222 N | ||||
| Max Axial Load-N | 10 N | 89 N | ||||||
| Standards | EU 2015/863 RoHS 3 directive | |||||||
Dimensions
NEMA 17 [BM24]
NEMA 23 [BM75, BM130, BM200]
NEMA 34 [BM250, BM500]
NEMA 42 [BM800, BM1400]
Ordering Info
NEMA Brushless Rotary Servomotors
| Option | Description |
|---|---|
| BM24 | NEMA 17 brushless rotary servomotor |
| BM75 | NEMA 23 brushless rotary servomotor |
| BM130 | NEMA 23 brushless rotary servomotor |
| BM200 | NEMA 23 brushless rotary servomotor |
| BM250 | NEMA 34 brushless rotary servomotor |
| BM500 | NEMA 34 brushless rotary servomotor |
| BM800 | NEMA 42 brushless rotary servomotor |
| BM1400 | NEMA 42 brushless rotary servomotor |
Connectors (Required)
| Option | Description |
|---|---|
| -MS | Integral cable w/MS connector for Fbk and Mtr |
| -D25 | Integral cable w/D25 Fbk and 4D Mtr (only available on BM24, BM75, BM130, and BM200) |
| -D25-9D | Integral cable w/D25 Fbk, 4D Mtr, and 9D Limit (only available on BM75, BM130, and BM200) |
| -D25-FLB | Integral cable w/D25 Fbk, Fly Leads for Mtr, and 9D Limit (only available on BM75, BM130, and BM200) |
| -D25-5DU | Integral cable w/D25 Fbk, 5D Mtr, and 9D Limit (only available on BM75, BM130, and BM200) |
| -D25-9D-CMS | Integral cable w/D25 Fbk, 4D Mtr, and 9D Limit - CMS Only (only available on BM75, BM130, and BM200) |
| -D25-4TS | Integral cable w/D25 Fbk, 4TS Mtr, and 9D Limit (only available on BM75, BM130, and BM200) |
Brake (Optional)
| Option | Description |
|---|---|
| -BK | Holding Brake |
Feedback (Required)
| Option | Description |
|---|---|
| -E1000H | 1000 lines/rev TTL incremental encoder w/Hall tracks not available for BM24 |
| -E2500H | 2500 lines/rev TTL incremental encoder w/Hall tracks |
| -E5000H | 5000 lines/rev TTL incremental encoder w/Hall tracks; not available for BM24 |
| -E1000ASH | 1000 lines/rev 1 Vpp incremental encoder w/Hall tracks |
Cable Type (Optional)
| Option | Description |
|---|---|
| -HF | High flex cable; only available on BM75, BM130, and BM200 |
Cable Length (dm) (Optional)
| Option | Description |
|---|---|
| -XX | Cable length in decimeters (3.8 dm is default); only available on BM75, BM130, and BM200 |
Shaft Seal (Optional)
| Option | Description |
|---|---|
| -NS | Nitrile front shaft seal; only available on BM250, BM500, BM800 and BM1400 |
Vacuum Preparation (Optional)
| Option | Description |
|---|---|
| -VAC6 | Vacuum preparation to 10-6 Torr |
Notes:
- Not available with BM24.
Accessories (Optional)
| Option | Description |
|---|---|
| MC-HPD25-M | Connector; HPD motor power mate |
| MC-DB25-F | Connector; DB25 motor feedback mate |
| MCM-3 | Connector; MS motor power mate |
| MCF-3 | Connector; MS motor feedback mate |
Notes:
- Accessories are ordered as separate line items.
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