Industrial
Productivity Tools
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Powerboss
Soft
Start, Soft Stop |
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| Powerboss
Plus adds a new dimension to 3 Phase AC Induction motor applications, by
providing controlled starting and stopping of motors, with variable ramp
times and current limit settings. A simple maintenance free installation
with remote control and current free switching - plus the additional benefit
of an unrivalled potential for optimisation ensure total effective control. |
| This dramatic
level of increased motor efficiency can provide further valuable benefits
of: A reduction in electricity and maintenance costs, improved power factor,
lower maximum demand, improved reliability and increased production. |
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Soft
start – Soft stop
Remote control/switching
Lower maintenance costs
Energy savings |
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The Problem
When starting, an AC induction motor
develops substantially more torque than is required at full speed. This
stress is transferred to the mechanical transmission systems resulting
in excessive wear and premature failure of gears, chains, belts etc.
Damage can be inflicted on the machinery
under control, which apart from production losses, can be dangerous, and
expensive to correct.In some instances products under manufacture are destroyed
due to motors stopping abruptly. This is especially the case with pumping
fluids where torque transients often cause water hammer effects, and in
some instances, failure to gradually slow the fluid down before stopping
can cause the kinetic energy to rupture pipes and couplings.
Rapid acceleration also has a massive
impact on the electricity supply charges with high inrush currents drawing
up to 6-9 times the normal run current. Voltage dips, brownouts, overheating,
contactor wear and failure can result. The use of Star-Delta provides only
a partial solution to the problem. Furthermore, in this configuration,
should the motor slow down during the transition period, high peaks can
be repeated and even exceed direct online current. |
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The Solution
Powerboss Plus provides a reliable and
economical solution to these problems by delivering a controlled release
of power to the motor, thereby providing smooth stepless acceleration and
deceleration – also enabling more frequent starting and stopping.
Powerboss will give increased protection
to the motor and peripherals also reducing high shock load, backlash, Vee
belt stress etc. Noise and vibration will decrease and motor life can be
extended as damage to windings and bearings, is reduced. |
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| Once
the motor has reached full speed, the Powerboss optimising mode will search
for the minimum power required to ensure the maximum continuous rating
of the motor is matched exactly to the load as it varies. Thus improving
power factor and ensuring minimum running costs. |
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| For
a full technical explanation and specification of the full range of Powerboss
units please refer to the document; Powerboss… technically speaking, available
from IPT. |
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