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Serie BH-BK

Overview BH10 BH14 BH20 BH20-F BK25-F
BK25-F

Servomotor type BK25 servoventilated.

Servomotors with forced air cooling. 264mm square case flange and 6 body lengths. Stall torque in S1 servo-ventilated service from 150 to 540Nm. Terminal box (IP54) for power and M23 type signal connector.

Electrical data

Version for power supply a 400VAC
 Symbol U. M. BK25K BK25S BK25N  BK25M  BK25L  BK25G 
Drive supply voltage
  
400VAC
Stall torque at 100K Δt
 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 at 100K Δt  Pn kW
 15 28 41 21 42 58 28 54 75 35 67 93 42 80 110 53 101 145
Torque at rated speed at 100K Δt 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% at 100K Δt 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
Phase to phase inductance 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
E.M.F. 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 at 100K Δt 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 at 100K Δt  Vn V
 380               
Stall current at 100K Δt 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 Δt 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 (motor with brake) Jmb gm2  NA NA
 NA
 NA
 NA
 NA
Mass M Kg  100 118 135 153 175 219
Mass with brake Mb Kg  NA
 NA
 NA
 NA
 NA
 NA

Thermal data

Motor type BK25/F  (servo-fan) Symbol U. M. BK25K BK25S BK25N BK25M BK25L BK25G
Reference and operating conditions
   °C 0÷40
Insulation class
  Class F
Cooling system
  Forced ventilation: IC416
Fan power supply   VAC 230V
Fan power supply current   A 0.66÷0.94
Fun frequency   Hz 50/60
Fan start-up temperature   °C 70
Protection degree
  IP54

Brake parking data ( version with brake not available at the moment )

Motor type BK25/F  (servo-fan)
 Symbol U. M. BK25KS BK25S BK25N BK25M BK25L BK25G
Static brake torque 100°C * Tb Nm NA
Brake power a 20°C
 Pb W NA
Coupling time
ms  NA
Release time
   ms NA
Drive voltage ±5%   VDC NA
Backlash   Arcmin NA
* Torque obtained after running-in

Standard technical specifications

- Not available at the moment.

Type

- Permanent magnet synchronous servomotor without commutator.. 
Rotor

- rare earth permanent magnets (NdFeB)
Winding
Standard

- 1000rpm
- 2000rpm
- 3000rpm
- winding powered up to 480VAC
On demand

- other combinations of voltage and speed possible..
Insulation

- class F
Thermal protection sensors
Standard

- by means of PTC on signal connector and KTY84 on terminals inside the terminal box
Cooling

 

- 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.
Standard protection
  

- 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.
Ball bearings

- ball bearings with double shield lubricated for life
Balancing

- grade G6,3 according ISO 21940-11
Axis/flange concentricity and perpendicularity

- grade "N" (rated) - according to IEC 72 - DIN0530
Shaft output

- with key, with coaxial threaded hole
Brake
Optional

- Not avaible at the moment
Cable and connections
  
Power - on terminal box (M code)
Signal - with M23 type horizontal connector (G code)

Dimensions

BK25-F
Motor type
 L LF X XF Note
BK25K-F 495 NA
 262 NA
 1) the oil seal is mounted only if an oil bath coupling is foreseen
BK25S-F 538 NA
 320 NA
BK25N-F 618 NA
 370 NA
BK25M-F 671 NA
 420 NA
BK25L-F 725 NA
 476 NA
BK25G-F 832 NA
 583 NA
Drawings Download 3D