(Motor Controls and Drives)
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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... (View Full Article)
(Motor Controls and Drives)
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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... (View Full Article)
(Motors)
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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... (View Full Article)
(Heating and Cooling Equipment)
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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... (View Full Article)
(Relays and Relay Accessories)
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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... (View Full Article)
(Power Supply and Conditioning)
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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... (View Full Article)
(Motors)
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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... (View Full Article)
(Power Supply and Conditioning)
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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... (View Full Article)
(Motors)
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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... (View Full Article)
(Power Supply and Conditioning)
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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... (View Full Article)
(Pneumatic Equipment and Components)
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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,... (View Full Article)
(Transformers)
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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... (View Full Article)
(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... (View Full Article)
(Industrial Printing Equipment)
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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... (View Full Article)
(Pneumatic Equipment and Components)
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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... (View Full Article)
(Pneumatic Equipment and Components)
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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... (View Full Article)
(Pneumatic Equipment and Components)
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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... (View Full Article)
(Power Inverters)
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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... (View Full Article)
(Pneumatic Equipment and Components)
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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... (View Full Article)
(Data Input Devices)
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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.... (View Full Article)
(Industrial Computing)
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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.... (View Full Article)