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Multiquip's Patented Alternator Design
Why is the open delta design efficient?
As copper softens it generates less power. The open delta design runs with
the copper wires at 180º F, while other competitors models run with their
copper wires at 220º, and some are even as bad as 300º degrees.
One outstanding feature of all MQ WhisperWatt™ engine- generator packages is the patented, Denyo open-delta design
alternator. Of all the hardware assembled to form a complete generator
package, the AC alternator is probably the single most important albeit
misunderstood component in the assembly. The MQ Power alternator is built
like no other on the market. This is why MQ Power WhisperWatt™
generators offer industry leading motor starting with minimum voltage dips and
quicker recoveries.
The AC alternator or power generator is the device bolted to
the back of the engine bell housing the rotates at engine speed to produce AC
voltage and current. The alternator system is basically comprised of four
component systems that work together to produce AC power. These components
consist of the fixed mount stator or armature coils, the rotating field or
rotor, the exciter and the automatic voltage regulator (AVR). What makes
MQ better?
MQ's Open Delta Coil Excitation System is design is a separately
excited generator. That is, the AC voltage regulator is powered by a separate
excitation winding which is placed on the stator core together with the armature
windings. The excitation winding provides dedicated input power to the
automatic voltage regulator, which controls the AC voltage output. The
voltage regulator increases or decreases exciter current as it senses changes in
output voltage and frequency, based on changes in load, thus increasing or decreasing
the generator field strength. The main benefit of having a separate
exciter winding is the fact that the voltage input power supplied to the voltage
regulator is un-affected by the load induce fluxuations, specifically, non
linear loads. And, during motor starting operations, the Denyo automatic
voltage regulator switches the configuration of the internal open-delta
connections to provide virtually unlimited excitation voltage, resulting in
superior motor starting ability, better voltage response and voltage transient
conditions. The system is so unique in design and benefits, it carries
U.S. patent #4268778.
Other manufacturers' system consist of a self excited
generator. That means the input power supplied to the regulator is tapped
from the generator output. The effectiveness of the voltage regulator in
managing this event is somewhat decreased when the available AC voltage signal
provided to the regulator is derived from the same AC voltage circuit being fed
to the load. IF there are load induced fluxuations, precise voltage
regulation is compromised.
Other manufacturers' typically offer to provide their
alternator with a PMG or permanent magnet generator. This is an extra
cost, bolt on, alternator modification that does provide the voltage regulator
with separately derived voltage input power. However, it is not as
effective as MQ. And, it is extra cost.
The combination of the open-delta excitation system and
automatic voltage regulation which contribute to precisely control the generator
output voltage and provide a stable supply of in rush current for motor
starting, makes the MQ WhisperWatt™ engine-generator
packages superior to all others in the industry.
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