Servomotor type BH20 Servoventilated.
Highly dynamic servomotors with forced air cooling. Mechanics with 200mm square case flange and 4 body lengths. Servo-ventilated. Stall torque from 48 to 175Nm ( S1 service). Terminal box (IP54) for power and M23 type signal connector.
Electrical specifications
| Version for 400VAC power supply |
Symbol | U. M. | BH20S | BH20N | BH20M | BH20L | BH20G | |||||||||||
| Drive supply voltage |
400VAC | |||||||||||||||||
| Stall torque at 100° Dt |
To | Nm | 47.8 | 72.7 | 94.5 | 139.4 | 174.6 | |||||||||||
| Rated speed | n | RPM | 1000 | 2000 | 3000 | 1000 | 2000 | 3000 | 1000 | 2000 | 3000 | 1000 | 2000 | 3000 | 1000 | 2000 | 3000 | |
| Power at rated speed 100K Dt | Pn | W |
4820 | 9220 | 12820 | 7140 | 13450 | 18910 | 9250 | 17130 | 23880 | 13180 | 26390 | 32550 | 15990 | 28020 | 37700 | |
| Torque at rated speed 100K Dt | Tn |
Nm |
46 | 44 | 40.8 | 68.2 | 64.2 | 60.2 | 88.3 | 81.8 | 76 | 125.9 | 113.3 | 103.6 | 152.7 | 133.8 | 120 | |
| Torque peak in S3 10% | Tpk |
Nm |
100 | 160 | 210 | 300 | 410 | |||||||||||
| Poles | PN | 8 | ||||||||||||||||
| Winding resistance 20°C phase/phase |
Rw |
Ohm |
3.1 | 0.94 | 0.34 | 1.6 | 0.48 | 0.17 | 1.35 | 0.28 | 0.15 | 0.6 | 0.19 | 0.07 | 0.44 | 0.14 | 0.04 | |
| Phase-to-phase inductance 50Hz |
Lw |
mH | 31 | 9.2 | 3.3 | 20 | 5.8 | 2.10 | 16.65 | 6.10 | 1.9 | 8.6 | 2.70 | 0.96 | 6.83 | 2.25 | 0.56 | |
| E.M.F. constant ref at 20°C |
Ke | V/Krpm | 285 | 157.8 | 95.5 | 282 | 158 | 95.1 | 315 | 148 | 105.7 | 289 | 160 | 95.1 | 250.7 | 142.9 | 84.2 | |
| Torque constant |
Kt | Nm/Arms | 4.20 | 2.35 | 1.41 | 4.23 | 2.35 | 1.41 | 4.56 | 2.13 | 1.52 | 4.14 | 2.3 | 1.38 | 4.06 | 2.317 | 1.188 | |
| Rated voltage 100°C |
Vn | V |
379 | 385 | 334.1 | 368 | 368 | 322.2 | 391 | 336 | 354 | 342 | 347 | 294.5 | 342 | 351 | 263 | |
| Stall rotor current at 100K Dt | Io |
A | 11.4 | 20.3 | 34 | 17.2 | 31 | 51.5 | 20.7 | 44.4 | 62.2 | 33.7 | 60.6 | 101 | 43 | 75.4 | 147 | |
| Current at rated speed 100K Dt |
In |
A | 10.95 | 18.7 | 29.1 | 16.1 | 27.3 | 42 | 19.4 | 3.4 | 49.5 | 30.4 | 49.3 | 74 | 37.6 | 57.7 | 99 | |
| Peak current |
Ipk | A | 30 | 54 | 87 | 48 | 81 | 135 | 58 | 114 | 150 | 91.1 | 162 | 215 | 112 | 195 | 330 | |
Mechanical Data
| BH20 servo-ventilated motor |
Symbol | U. M. | BH20S | BH20N | BH20M | BH20L | BH20G |
| Rotor inertia | Jm | gm2 | 7.84 | 10.76 | 13.68 | 19.52 | 25.36 |
| Rotor inetia with brake | Jm | gm2 | 13.06 | 15.98 | 18.90 | 24.94 | 30.58 |
| Weight |
M | Kg | 40 | 48.5 | 54.5 | 70 | 84.5 |
| Weight with brake | Nb | Kg | 59 | 67.5 | 73.5 | 89 | 103.5 |
Thermal resistor
| BH20 servo-ventilated motor |
Symbol | U. M. | BH20S | BH20N | BH20M | BH20L | BH20G |
| Operating temperature |
°C | 0÷40 |
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| Insulation class |
Winding H class - Motor F class | ||||||
| Cooling down |
Forced ventilation : IC416 | ||||||
| Fan power supply |
VAC | 230V | |||||
| Fan power supply current |
A | 0.37÷0.33 | |||||
| Fan frequency |
Hz | 50/60 | |||||
| Fan start-up temperature |
°C | 70 | |||||
| Standard protection | IP54 ( excluded shaft side ) | ||||||
Brake specifications
| BH20 servo-ventilated motor |
Symbol | U. M. | BH20S | BH20N | BH20M | BH20L | BH20G |
| Static brake torque 100°C * | Tb | Nm | 160 | ||||
| Brake power at 20°C |
Pb | W | 55 | ||||
| Engagement time |
ms | 13 | |||||
| Release time | ms | 140 | |||||
| Power volatage ±5% | VDC | 24 | |||||
| Angular backlash | Arcmin | 8 | |||||
| * torque obtained after running-in | |||||||
Standard technical specifications
Type |
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- Permanent magnet synchronous servomotor without commutator. |
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Rotor |
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- rare earth permanent magnets (NdFeB) |
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Insulation |
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- winding, class H; F-Class engine |
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Winding |
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| Standard |
- 1000-2000-3000rpm |
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| on demand |
- other combinations of voltage and speed possible. |
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| Insulation |
- class H winding |
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Thermal protection sensors |
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| As standard |
- by means of PTC, only for 220/400V sizes |
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| Optional |
- KTY84 only available in some models |
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Cooling system |
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- forced ventilation (IC416) via asynchronous servo fan for 230VAC (50/60Hz) power supply - Automatic switch-on at approximately 70°C via thermal sensor on the winding. |
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Standard rotation |
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| - IP54 (exclusion of the shaft side). Protection on the shaft side must be requested and is considered effective only in the presence of an oil bath coupling or with the presence of lubricant. The presence of the servo ventilation and the terminal box do not allow an IP65 rating. |
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Bearings |
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-ball bearings with double shield lubricated for life |
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Balancing |
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- Grade "R" |
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Axis/flange concentricity and perpendicularity |
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- grade "N" (normal) - according to IEC 72 - DIN0530 |
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Shaft output |
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- with key, with coaxial threaded hole |
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Brake |
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- optional. Permanent magnet parking brake, 24VDC power supply with determined polarity. Brake engaged in the absence of power. Braking torque greater than the motor Tn |
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Connections and cables |
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| Power | - on terminal box (M code) |
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| Signal | - with M23 type horizontal connector (G code) | |
Dimensions
| Motor type |
L | LF | X | XF | Notes |
| BH20S-F | 354 | 474 | 267 | 387 | 1) the oil seal is mounted only if an oil bath coupling is foreseen |
| BH20N-F | 390 | 510 | 290 | 410 | |
| BH20M-F | 426 | 546 | 330 | 450 | |
| BH20L-F | 498 | 618 | 405 | 525 | |
| BH20G-F | 570 | 690 | 485 | 605 | |
| DRAWINGS | Download 3D | ||||