Technical data

21
Energy saving
Energy saving is a common objective in all areas of
manufacturing. No company is exempt from the
need to save money and help the environment at
the same time.
If energy saving is your aim, Agile is the drive to
help you achieve it.
AgileE drives incorporate numerous functions for
reducing the electrical energy needed to power
motors and can make a major contribution to
energy saving in any plant.
Bonfiglioli knows exactly what factors determine a
drive’s energy efficiency and how to achieve major
energy savings. Now all this know-how has been
concentrated into a single product.
Sensorless control of permanent magnet
synchronous motors
Modernbrushlessmotorsareextremelyefcient
thanks to a design that favours excellent
electromechanical energy conversion and
minimises heat loss through the rotor.
Agile drives are designed to bring the benefits of
brushless motor technology within the reach of all
users.
Agile drives do not need encoders or resolvers
on board the motors to control them. They can
therefore save money by eliminating superfluous
components, without any loss of dynamic motor
performance.
Minimum earth leakage
Agile drives are equipped with a built-in, low
leakagecurrentEMClterthatconformstoall
applicable standards. By significantly reducing
earth leakage, this filter also maximises energy
savings under all operating conditions.
Power managing
Motorefciencyissignicantlyconditionedbythe
quality of the power supply.
Agile drives use control to reduce motor voltage
to suit applied loads without compromising
performance. This reduces motor losses,
consumption and maintenance requirements and
helps extend motor life. For example, if the motor
is run up to rated speed at zero load, there is no
need to apply full rated voltage. The minimum
voltage compatible with the needs of motor
magnetisation is all that is needed.
Torque required
by motor shaft
Motor at zero load Motor at zero load
Voltage applied
to motor
Minimum voltage Minimum voltage
Standby mode
Motorsareoftenusedinapplicationsinvolving
intermittent functioning cycles characterised by
alternating run and rest phases. Under conditions
like these, the drive itself has to remain powered
on in order to be ready to start the motor as soon
as the application demands.
To avoid unnecessary energy consumption during
motor rest periods without actually disconnecting
power to the inverter, Agile drives use a special
auto-standby function, which leaves the inverter
in a “sleep” condition with only its control circuits
active, a condition in which energy consumption is
minimal. A programmable delay can be adjusted
by users in order to extend the standby mode even
to keypad display. As soon as a start command is
received, the inverter “wakes up” immediately to
power the motor.
Energy status
of INVERTER
Operating status LOW CONSUMPTION status Operating status
Kinetic status
of MOTOR
Motor rest period