Technical Articles
Hitachi America, Ltd., Industrial Components and Equipment Division has published these technical articles:
(Motor Controls and Drives)
From this Article:
While the inefficiency of driving a car with the gas pedal to the floor and then controlling your speed using the brake is obvious to any driver, many facilities use that very same approach for pump...
(Motor Controls and Drives)
From this Article:
Regeneration occurs in an AC variable frequency drive system when the load overhauls the motor. This can occur when trying to decelerate the load, or when some external force causes the motor to...
(Power Supply and Conditioning)
(Motors)
From this Article:
Sometimes it is desirable to have the inverter trip when running at constant speed and the motor current falls below a certain threshold level. In the case of a pump, this would be indicative of...
(Power Supply and Conditioning)
(Gas Handling Equipment)
(Heating and Cooling Equipment)
From this Article:
When applying an inverter to centrifugal compressors on HVAC chillers, there are a number of factors to consider. For some compressors, lubricating oil circulation may be driven by the rotation of the...
(Relays and Relay Accessories)
From this Article:
Sometimes it may be necessary to drive a relay to activate certain external devices such as electromechanical brakes or clutches. Typically electromechanical relays have a 24VDC coil voltage. In the...
(Power Supply and Conditioning)
From this Article:
The following describes the components Hitachi offers to meet CE EMI requirements, Class A and Class B. The NF-CEH Filters provide EMI attenuation to meet Class A. The addition of the FC-H Ferrite...
(Motors)
From this Article:
One cause of premature bearing failure is so-called "electrical discharge machining." This problem has been around for many years. Current takes the path with the least resistance which is sometimes...
(Power Supply and Conditioning)
From this Article:
Welcome to the Hitachi America Inverter Technical Support Library. We hope that answers to most of your technical questions can be found in the documents on this page. However, should you not find the...
(Motors)
From this Article:
Although Hitachi does not offer inverters above 3 hp specifically sized and rated for single-phase operation, single-phase power can be safely used with larger 3-phase rated inverters, provided that...
(Power Supply and Conditioning)
From this Article:
Sometimes it may be desirable to use a remote START/STOP pushbutton arrangement together with an inverter. This often occurs when a machine is being retrofitted or upgraded with the addition of a...
(Pneumatic Equipment and Components)
From this Article:
Ambient air conditions have a
significant impact on rotary screw
air compressor and refrigerated air
dryer performance. Understanding
and managing equipment inlet air
pressure and temperature,...
(Transformers)
From this Article:
An
Oil--Free
Compressor
when
properly
applied
can
provide
financial
savings.
Here
are
a
few
concepts
to
be
aware
of
during
the
design
of
an
air
compressor
system.
Knowledge
of
the
actual
"point
of...
(Pneumatic Equipment and Components)
From this Article:
An
Oil--Free
Compressor
when
properly
applied
can
provide
financial
savings.
Here
are
a
few
concepts
to
be
aware
of
during
the
design
of
an
air
compressor
system.
Knowledge
of
the
actual
"point
of...
(Industrial Printing Equipment)
From this Article:
So it is with today's state-of-the-art ink-jet technology, which now is prompting positive
reactions due to steady improvements achieved during roughly the past decade,
including: better fluid...
(Pneumatic Equipment and Components)
From this Article:
Compressed air is used in most
manufacturing and process industries.
Most industrial processes have zero
tolerance for the introduction of oil into
the end product being manufactured.
Industries...
(Pneumatic Equipment and Components)
From this Article:
The U.S. Food and Drug Administration recognized the need for more The U.S. Food and Drug Administration recognized the need for more The U.S. Food and Drug Administration recognized the need for more...
(Pneumatic Equipment and Components)
From this Article:
Compressed air systems are
sometimes called the "4th Utility"
due to their presence in almost all
industrial processes and facilities.
The objective of this paper is to focus
on the opportunity to...
(Power Inverters)
From this Article:
Traditional inverters simply control motor speed, and must be paired with some type of an
additional logic controller in all but the most basic applications. This additional logic controller
is...
(Pneumatic Equipment and Components)
From this Article:
Compressed air is a key utility
supporting the food packaging and
food processing industries in North
America. Compressed air must
be contaminant-free to ensure the
protection of the food products...
(Data Input Devices)
From this Article:
When a food-contamination situation erupts, it's imperative that companies be well-equipped to trace the origins of that outbreak and act effectively to limit the public's exposure to pathogens....
(Industrial Computing)
From this Article:
When a food-contamination situation erupts, it's imperative that companies be well-equipped to trace the origins of that outbreak and act effectively to limit the public's exposure to pathogens....