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BH-BK serie.

Overview BH10 BH14 BH20 BH20F BK25F
BK25F

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
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

- Permanent magnet synchronous servomotor without commutator. 
Rotor

- with rare earth permanent magnets ( NdFeB )
Isolamento

- winding, class H; F-Class engine
Winding
Standard

- 1000-2000-3000rpm
- winding at 400VAC
On demand

- other combinations of voltage and speed possible.
Insulation

- class H winding
- class F motor
- Insulation suitable for 400VAC power supply
Thermal protection sensors
As standard

- by PTC, only for 220/400V sizes
Options

- KTY84 only on demand
Raffreddamento

 

- 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.
Bearings

- ball bearings with double shield lubricated for life
Equilibratura

- Grade "R"
Axis/flange concentricity and perpendicularity

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

- with key, with coaxial threaded hole
Brake

- Not available at the moment.
Connections and cables
  
Power - on terminal box ( code M )
- 2 terminal box available according to the value of stall current of the motor.
Signal - with M23 type horizontal connector (G code)