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In our very last Productivity Forum, we concentrate on one of Nikola Tesla's most significant inventions--the ac motor. In this report, Motion System Design editors polled ac motor experts for [...]

Just when you might think announcements of new lift truck designs might be flagging, that's not the case. In fact, the latest design advances are across many different types of [...]

In the past, the majority of high-performance industrial applications have used de motors and controls, but advances in adjustable-frequency ac technology are making ac motors more attractive. These strides have [...]

Key Concepts * AC drives are becoming the preferred drives for electric lift trucks. * AC motors are inherently simpler and require less maintenance. * Controllers in ac drives provide [...]

Questions abound when it comes to choosing drives and motors. Open loop or closed loop? Variable or constant torque? High performance or general purpose? Then there's the question of ac [...]

Overhead trolley systems have been around for years and this technology can hardly be described as new. But while the cost benefits of such systems are understood, few have been [...]

Printing presses have traditionally been powered by DC motors, but AC press drives are becoming more common. ABB Industrial Systems is offering its presses with either DC or AC drives, and Mitsubishi Lithographic Presses is making AC drives standard on its presses. In comparision to DC drives, AC drives need less maintenance, use less power, and need no cooling., OF ALL THE pressroom equipment decisions newspapers have had to make over the years, one used to be a no-brainer: The printing press would be driven by a DC motor, [...]

Ensure torque matches the load requirements under all conditions The induction motor's ruggedness and simple construction offers the benefit of a very reliable machine. However, if the motor is improperly [...]

Spanish company Ingeteam Technology has recognized the need for oceanographic vessels used in fisheries to meet the International Council for the Exploration of the Sea 209 specification for underwater noise. Ingeteam has investigated the noise and vibration benefits of using alternating current (AC) motors and converters. Insights on AC conversion topologies are also given.

The AC drive is being accepted as the standard control for most crane manufacturers today. The two main reasons why this technology is being accepted over wound rotor control are [...]

This report examines the benefits of the all-electric ship, and discusses the latest developments and future challenges in the use of AC Drives in naval and commercial vessels.

Recent technology advances have seemingly made life easier--witness the move from typewriters to computers, standard to electronic mail, analog tapes to MP3s, but advancing technologies also can amplify other issues [...]

SUCCESSFUL MOTOR APPLICATION depends primarily on selecting a motor that satisfies the kinetic requirements of the driven machine without exceeding the temperature or torque limitations of the motor. The first [...]

DC electric drive systems have traditionally been used to power the large excavators used in open pit mining, but static AC drives are becoming more popular. AC drives do not use commutators and brushes that wear out quickly, and their simpler design results in lower maintenance needs. AC drives also offer more varied speed controls, which allow them to be tailored to particular mining applications., (*) G Dean Johnson looks at trends in AC/DC electric drive systems in shovels, drills, draglines and trucks DC drive systems have been the industry standard for powering the sort [...]

AT THE LARGEST siolle-line pulp mill in the world, downtime can be extremely costly. Alberta-Pacific's new pulp mill, north of Edmonton, Alberta, in Canada, is expected to produce 1,500 tons/day [...]

More fans are needed to maintain boiler performance when a utility opts to add scrubbers to any of the 195 units of 200 MW and above identified by the Environmental [...]

AC power is the name of the game these days ha the material handling field. Following is a look at some recently-introduced AC-powered lift trucks: AC technology is brushless, meaning [...]

Application | | Web processing Background: Traditionally, mechanical brake and air-supply systems have provided brake control to processors unwinding or holding back a strand or web. But air brakes and [...]

ST. LOUIS--Variable speed AC motor drives, which are already widely used in HVAC applications, are becoming increasingly popular in industrial process control despite original user fears that failure of the [...]

Electric motors and controllers are available in a wide range of configurations. Motors may be of the squirrel-cage induction, wound-rotor, synchronous, stepper and linear type for applications requiring low starting current, variable speeds and variable torque. Examples of controllers include starters for full-voltage and reduced-voltage starting., Included in this category are all types of motors and starters; auxiliaries such as brakes and clutches; monitors for high temperature and over-load and grouped motor controllers such as MCCs [...]

Alternating-current motors that have been used for more than 10 years in Europe to power high-speed passenger trains are being readied to debut on freight trains in the United States. [...]

Vector ac servo drive expands machine capability For several years, the engineers at Universal-Automatic Corp., Des Plaines, Ill., have earned a fine reputation for designing and building speciality machine tools. [...]

SIMPLIFIED REMOTE CONTROL Remotely piloted vehicles (RPV) are usually controlled by digital signals. An RPV receives and decodes the radio-transmitted signal and reconstructs it into an analog signal that operates [...]