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Serie BH-BK

Overview BH10 BH14 BH20 BH20-F BK25F
BH20

BH20 Servomotor

Servomotors with natural air cooling. 200mm square case flange and 5 body lengths. Stall torques in S1 non-ventilated service from 30 Nm up to 117 Nm. Terminal box (IP54) for power and M23 type signal connector.

Electrical specification

Version for 4 power supply 400VAC
  Symbol   U.M. BH20S BH20N BH20M  BH20L  BH20G 
Drive supply voltage
  
400VAC
Stall torque 100K Dt
 To Nm 33,6 48,5 64,7 87,2 116,5
Rated speed n RPM 1000 2000 3000 1000 2000 3000 1000 2000 3000 1000 2000 ND 1000 2000 ND
Power at rated speed 100K Dt  Pn W
 3150 5400 6750 4430 6890 6380 5630 8210 5720 6960 8290 - 9120 10140 -
Torque at rated speed 100K Dt Tn
Nm
 30,1 25,8 21,5 42,3 32,9 20,3 53,8 39,2 18,2 66,5 39,6 - 87,1 48,4 -
Peak torque with service 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 0,151 0,6 0.19 - 0,44 0.14 -
Phase-to-phase inductance 50Hz
 Lw
mH 31 9.2 3.36 20 5.80 2.1 16.6 6.10 1.96 8.6 2.70 - 6.8 2.25 -
E.M.F. constant ref at 20°C
 Ke V/Krpm 285 157.8  94.6 282 158 95.1 315 148 105.7 289 160 - 300 178 -
Torque constant
 Kt Nm/Arms 4.4 2.44 1.46 4.27 2.37 1.42 4.8 2.24 1.6 4.25 2.36 - 4.17 2.38 -
Rated voltage 100°C
  Vn V
 325 331 287 318 319 274 334 286 288 290 295 - 293 300 -
Stall torque at 100K Dt Io
 A 7.6 13.7  22.9  11.3  20.5  34.1  13.5  28.9  40.5  20.5  36.9  - 28.5  49.8  - 
Current at rated speed 100K Dt
 In
 A 6.8 10.5  14.5  9.9  13.9  14.4  11.2  17.5  11.8  15.6  16.8  - 20.9 20.4  - 
Peak current  Ipk  A 30 54  87  48  81  135  58  114  150  91.1  162  - 112  195  - 

Mechanical data

Motor type BH20 Symbol  U.M. BH20S BH20N BH20M BH20L BH20G
Rotor inertia  Jm gm2 7.84 10.76  13.68  19.52  25.36 
Rotor inertia with brake
 Jm gm2  13.06 15.98  18.90  24.74  30.58 
Weight M Kg  32.5 40  45  59.5  72.5 
Weight with brake Nb Kg  49.5 57  62  76.5  89.5 

Thermal characteristics

Motor type BH20
  Symbol  U.M. BH20S BH20N BH20M BH20L BH20G
Operating temperature
   °C 0÷40
Insulation class
  Winding class H - Motor class F
Cooling system
  Natural air: IC0041
Standard protection
  IP54 ( excluded shaft side)

Brake specifications

Motor type BH20
  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
Voltage ±5%   VDC 24
Angular backlash   Arcmin 8
* torque obtained after running-in

Transducers available

Motor type BH20
  Oder code BH20S BH20N BH20M BH20L BH20G
Resolver cod.1 Available
Optical incremental encoder 1024ppr 5V LD with Halls sensors
 cod.2 Not available
Optical incremental encoder 2500 ppr 5V LED with Halls sensors
 cod.200 Available
Magnetic incremental encoder 1024ppr 5V LD with Halls sensors cod.280  Not available
Absolute Magnetic  encoder 1024ppr SSI Bin
 cod.480  Not available
Multiturn absolute encoder 22Bit, 4096 turns, BiSS with SinCos
 cod.512  Available

Standard technical specifications

Type

- Permanent magnet synchronous servomotor without commutator.. 
Rotor

- rare earth permanent magnets (NdFeB)
Insulation

- winding: class H
- motor: class F
Winding
Standard

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

- other combinations of voltage and speed possible.
Isolamento

- winding: class H
- motor: class F
- Insulation suitable for 400VAC
Thermal protection sensors
Standard

- by means of PTC
Option

- KTY84 only in some models
Cooling system

 

- natural air ( IC0041 )
Standard protection
  

- IP54 (shaft side exclueded). IP65 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.
Ball bearings

- ball bearings with double shield lubricated for life
Balancing

- Grade "R"
Axis/flange concentricity and perpendicularity

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

- with key, with coaxial threaded hole
Brake

- 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
- Brake not suitable for dynamic stops. It can tolerate a limited number of emergency braking operations
- Due to the power dissipated by the brake it is recommended to derate the motor stall torque by 5%.
- optional. Permanent magnet parking brake, 24VDC power supply with determined polarity. Brake engaged in the absence of power. Braking torque greater than the Tn of the motor
- optional. Permanent magnet parking brake with braking torque > Tn
Cable and connections
  
Power - on terminal box (M code)
Signal - with M23 type horizontal connector (G code)

Dimensions

BH20
Motore tipo
 L LF X XF Note
BH20S 265 302 182 385 1) il paraolio viene montato solo se è previsto un accoppiamento in bagno d'olio
BH20N 301 338 218 421
BH20M 337 374 254 457
BH20L 409 446 326 529
BH20G 481 518 398 601
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