Integrated Synchronous Servo Drives
HBI 22xx / HBI 26xx / HBI 32xx / HBI 37xx
Operating Manual Rev. 1.6
www.engelantriebe.de
page 10
3.6
Important technical information
3.6.1 Regenerative operation
Attention
!
Regenerative operation (generator mode) leads to an increase in operational voltage!
Observe permissible voltage values of the power supply and consumers connected in
parallel!
The HBI drives are equipped with an internal ballast circuit (brake chopper), which is capable of converting a low brake
power into heat for a short duration. Brake power conversion leads to a temperature rise in the motor system. Together
with the intermediate circuit (DC-link) capacity, dynamically occurring brake energies can be accommodated
.
If the devices operate quasi-statically in generator mode, suitable measures must be taken for the removal / conversion of
the energy (e.g. through an external ballast circuit).
Regenerated energy leads to an increase of the DC-link voltage, which is returned directly to the power connection of the
device and/or to the feeding direct current source (if necessary, provide a diode for the decoupling of the operating
voltage). The effect of the voltage increase when braking can be reduced, if necessary, by selecting a less abrupt, that is
a longer brake ramp.
If applicable, regenerated energy can be distributed to other loads connected to the supply voltage in parallel.
If regenerated braking energy cannot be converted, the terminal voltage increases until the triggering of an overvoltage
error. The following voltage limits are specified in the devices:
Devices with 24V operating voltage:
Ballast circuit working voltages:
U
Ballast ON
30 V , U
Ballast OFF
27 V
Triggering of the overvoltage error:
U
Error4
32 V
Devices with 48V operating voltage:
Ballast circuit working voltages :
U
Ballast ON
60 V , U
Ballast OFF
55 V
Triggering of the overvoltage error:
U
Error4
65 V
3.6.2 Lead fuses
The integrated HBI drives are not internally fused. A suitable external fuse must be provided.
3.6.3 Service life expectancy
The service life of the integrated HBI drives is largely determined by the stress of the DC-link capacitors. With an ambient
temperature of 40°C and motor current = motor rated current, a service life expectancy of approx. 15,000h can be assumed.
With lower motor currents and/or lower ambient temperatures, higher service life expectancies arise.
