![BK25F](/images/BK25_cmyk_2.jpg)
Servomotor type BK25/F servo-fan.
Highly dynamic servomotors with forced air cooling. Mechanics with flange in a 264mm square case and 6 body lengths. Servo-ventilated motor. Stall torques from 150 to 540Nm ( S1 service ). Terminal box (IP54) for power and M23 type signal connector.
Electrical specifications
Version for power supply a 400VAC |
Symbol | U.M. | BK25K | BK25S | BK25N | BK25M | BK25L | BK25G | ||||||||||||
Drive supply voltage |
400VAC | |||||||||||||||||||
Stall torque at 100K Dt |
To | Nm | 150 | 215 | 280 | 345 | 410 | 540 | ||||||||||||
Rated speed | n | RPM | 1000 | 2000 | 3000 | 1000 | 2000 | 3000 | 1000 | 2000 | 3000 | 1000 | 2000 | 3000 | 1000 | 2000 | 3000 | 1000 | 2000 | 3000 |
Power at rated speed of 100K Dt | Pn | kW |
15 | 28 | 41 | 21 | 42 | 58 | 28 | 54 | 75 | 35 | 67 | 93 | 42 | 80 | 110 | 53 | 101 | 145 |
Torque at rated speed 100K Dt | Tn |
Nm |
145 | 135 | 130 | 205 | 198 | 185 | 270 | 260 | 240 | 335 | 320 | 295 | 400 | 380 | 350 | 510 | 480 | 460 |
Peal torque with S3 10% | Tpk |
Nm |
280 | 420 | 550 | 690 | 830 | 1100 | ||||||||||||
Poles | PN | 8 | ||||||||||||||||||
Winding resistance 20°C phase/phase | Rw |
Ohm |
0.841 | 0.202 | 0.091 | 0.469 | 0.097 | 0.050 | 0.306 | 0.061 | 0.034 | 0.217 | 0.054 | 0.028 | 0.184 | 0.046 | 0.021 | 0.102 | 0.026 | 0.014 |
Inductance phase/phase 50Hz | Lw |
mH | 17.5 | 4.38 | 1.94 | 12 | 2.52 | 1.33 | 9.15 | 1.81 | 1.02 | 6.97 | 1.74 | 0.89 | 6.19 | 1.55 | 0.69 | 3.7 | 0.92 | 0.52 |
EMF constant ref. at 20°C | Ke | V/Krpm | 343 | 171 | 114 | 339 | 155 | 113 | 332 | 148 | 111 | 325 | 163 | 116 | 335 | 167 | 112 | 297 | 148 | 111 |
Torque constant | Kt | Nm/Arms | 5.67 | 2.83 | 1.89 | 5.61 | 2.57 | 1.87 | 5.5 | 2.44 | 1.83 | 5.38 | 2.69 | 1.92 | 5.53 | 2.76 | 1.84 | 4.9 | 2.45 | 1.84 |
Rated voltage 100°C | Vn | V |
380 | |||||||||||||||||
Stall current at 100K Dt | Io |
A | 30.3 | 59 | 89 | 43 | 94 | 129 | 57 | 128 | 171 | 71.8 | 144 | 201 | 83 | 166 | 249 | 123 | 246 | 329 |
Rated speed current at 100K Dt | In |
A | 29 | 54 | 78 | 42 | 87 | 112 | 56 | 121 | 148 | 71 | 135 | 174 | 82 | 156 | 215 | 118 | 221 | 283 |
Peak current | Ipk | A | 62 | 123 | 185 | 94 | 204 | 281 | 125 | 281 | 375 | 160 | 321 | 449 | 187 | 375 | 562 | 280 | 560 | 747 |
Mechanical data
Motor type BK25/F (servo-fan) |
Symbol | U.M. | BK25K | BK25S | BK25N | BK25M | BK25L | BK25G |
Rotor Inertia | Jm | gm2 | 22.5 | 31.8 | 41.0 | 50.2 | 59.3 | 78.0 |
Rotor Inertia with brake | Jm | gm2 | ND | ND | ND | ND | ND | ND |
Weight | M | Kg | 100 | 118 | 135 | 153 | 175 | 219 |
Weight with brake | Nb | Kg | ND | ND | ND | ND | ND | ND |
Thermal features
Motor type BK25/F (servo-fan) | BK25K | BK25S | BK25N | BK25M | BK25L | BK25G | ||||
Operating temperature |
°C | 0÷40 |
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Insulation class | Winding class H - Motor class F | |||||||||
Cooling system | Forced ventilation: IC416 | |||||||||
Fan power supply | VAC | 230V | ||||||||
Fan power supply current | A | 0.37÷0.33 | ||||||||
Servo-fun frequency | Hz | 50/60 | ||||||||
Fan start-up temperature | °C | 70 | ||||||||
Standard protection | IP54 ( front side shaft excluded ) |
Brake specification ( version with brake not available at the moment )
Motor type BK25/F (servo-fan) |
Symbol | U.mis. | BK25KS | BK25S | BK25N | BK25M | BK25L | BK25G | ||
Static brake torque 100°C * | Tb | Nm | ND | |||||||
Brake power a 20°C |
Pb | W | ND | |||||||
Engagement time |
ms | ND | ||||||||
Release time |
ms | ND | ||||||||
Drive voltage ±5% | VDC | ND | ||||||||
Angular backlash | Arcmin | ND | ||||||||
* 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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- with rare earth permanent magnets ( NdFeB ) |
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Isolamento |
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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 PTC, only for 220/400V sizes |
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Options |
- KTY84 only on demand |
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Raffreddamento |
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- forced ventilation (IC416) via asynchronous servo fan for 230VAC (50/60Hz) power supply |
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Standard protection |
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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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Equilibratura |
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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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- Not available at the moment. |
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Connections and cables |
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Power | - on terminal box ( code M ) - 2 terminal box available according to the value of stall current of the motor. |
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Signal | - with M23 type horizontal connector (G code) |