Serie BH-BK

BH20

Servomotor type BH20

Servomotors with natural air cooling. 200mm square case flange and 5 body lengths. Stall torques in S1 non-ventilated service from 33,6 Nm up to 118,5 Nm. Terminal box (IP54) for power and M23 type signal connector.

Electrical data

Version for 4 power supply 400VAC
Symbol U. M. BH20S BH20N BH20M  BH20L  BH20G 
Drive supply voltage
 
400VAC
Stall torque at 100K Δt
To Nm 33,6 48,5 64,7 87,2 118,5
Rated speed n RPM 1000 2000 3000 1000 2000 3000 1000 2000 3000 1000 2000 ND 1000 2000 ND
Power at rated speed at 100K Δt  Pn W
3150 5400 6750 4430 6890 6380 5630 8210 5720 6960 8290 - 9120 10140 -
Torque at rated speed at 100K Δt 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 S3 10% at 100K Δt Tpk
Nm
100 160 210 300 410
Poles  PN   8
Winding resistance 20°C phase/phase
Rw
Ohm
3,1 0.94 0,35 1,6 0.48 0,17 1,35 0.28 0,15 0,6 0.19 - 0,44 0.14 -
Phase-to-phase inductance 50Hz
Lw
mH 31 9.2 3.36 20 5.8 2.1 16.6 6.10 1.96 8.6 2.70 - 6.83 2.25 -
E.M.F. constant ref at 20°C
Ke V/Krpm 285 158  94.6 282 158 95.1 315 148 106 289 160 - 300 178 -
Torque constant at 100K Δt
Kt Nm/Arms 4.4 2.45 1.47 4.27 2.37 1.42 4.79 2.24 1.6 4.25 2.36 - 4.17 2.38 -
Rated voltage at 100K Δt
 Vn V
325 331 287 318 319 274 334 286 288 290 295 - 293 300 -
Stall torque at 100K Δt Io
 A 7.6 13.7  22.9  11.4  20.5  34.1  13.5  28.9  40.5  20.5  36.9  - 28.4  49.8 
Rated speed current at 100K Δt
In
 A 6.8 10.6  14.5  9.9  13.9  14.4  11.2  17.5  11.8  15.7  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 (motor with brake)
Jmb gm2  13.06 15.98  18.90  24.74  30.58 
Mass M Kg  32.5 40  45  59.5  72.5 
Mass with brake Mb Kg  49.5 57  62  76.5  89.5 

Thermal data

Motor type BH20
Symbol U. M. BH20S BH20N BH20M BH20L BH20G
Reference and operating conditions
  °C 0÷40
Insulation class

  Class F
Cooling system
  Natural air: IC410 (not ventilated)
Protection degree
  IP54

Brake parking data

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
Coupling time

ms  13
Release time
  ms 140
Drive voltage ±5%   VDC 24
Backlash   Arcmin 8
* Torque obtained after running-in

Torque curves

BH20

Standard technical specifications

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

 

- natural air IC410 (not ventilated)

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 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

- Electromagnetic 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%.

Cable and connections
 
Power - on terminal box (M code)
Signal - with M23 type horizontal connector (G code)

Feedback

Resolver
Code - 1

- 2 poles resolver

Incremental Encoder
Code - 200

- Incremental optical encoder at 2500imp./rev. with Hall sensors arranged at 120° - 5V line drive voltage

Absolute encoder
Code - 512

- Absolute optical multi-turn encoder BiSS-B with 22 Bit per turn and 12 Bit multi-turn resolution and SinCos channels 2048imp./rev.

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
DISEGNI Download 3D