Jack Johnson

Jack
L.
Johnson
Contribuitng Technical Expert,
IDAS Engineering Inc.

Jack Johnson is an electrohydraulic specialist, fluid power engineering consultant, and president of IDAS Engineering Inc., Milwaukee. Contact him at jack@idaseng.com, phone (414) 236-5350, or visit www.idaseng.com.

Articles
Hydraulic-Electric Analogies: Simple and Efficient
External gear pumps are widely used in hydraulics because of their simplicity and high efficiency. But because they are only available with fixed displacement, their efficiency decreases when transmitting less than full power.
Hydraulic-Electric Analogies: Hydraulic Power Conversion, Part 4
Achieving constant pressure and flow in hydraulics, or constant current and voltage with electricity, aren’t as straightforward as they may seem.
Hydraulic-Electric Analogies: Hydraulic Power Conversion, Part 3
Power generated by hydraulic systems exhibits current flow traits similar to those of its electrical counterparts.
Hydraulic-Electric Analogies: Hydraulic Power Conversion, Part 2
Power generated by hydraulic systems exhibits current flow traits similar to those of its electrical counterparts.
Hydraulic-Electric Analogies: Hydraulic Power Conversion, Part 1
Power generated from hydraulic-fluid systems exhibits similar ac current-flow traits like that of its electrical counterparts.
Hydraulic-Electric Analogies: Motors and Generators, Part 6
Understanding electrical behavior can improve your understanding of hydraulics. For example, a shunt-connected generator is perfectly analogous to a variable-displacement pump.
Hydraulic-Electric Analogies: DC Motors, Part 5
The analogous nature of hydraulic systems and their electrical counterparts can be compared and contrasted by examining motors and power conversion.
Hydraulic-Electric Analogies: Torque-Speed Behavior, Part 4
The analogous nature of hydraulic systems and their electrical counterparts can be compared and contrasted by examining motors and power conversion.
Hydraulic-Electric Analogies: Power Sources, Part 3
The analogous nature of hydraulic systems and their electrical counterparts can be compared and contrasted by examining motors and power conversion.
Hydraulic-Electric Analogies: Power Sources, Part 2
The analogous nature of hydraulic systems and their electrical counterparts can be compared and contrasted by examining motors and power conversion.
Hydraulic-Electric Analogies: Power Sources, Part 1
The analogous nature of hydraulics and their electrical counterparts becomes even more evident when examining motors and power conversion.
Hydraulic-Electric Analogies: Reservoirs and Grounds
Grounds in electrical circuitry and reservoirs in hydraulic systems often draw comparisons in concept, but they differ greatly in terms of design flexibility.
Hydraulic-Electric Analogies: Capacitors and Accumulators, Part 3
Volume is the most important parameter for the accumulator, followed by maximum operating pressure.
Hydraulic-Electric Analogies: Capacitors and Accumulators, Part 2
Developing an understanding of hydraulic capacitance helps eliminate pesky parasitic capacitances, and facilitates the overall application of circuit theorems in hydraulic design.
Hydraulic-Electric Analogies: Capacitors and Accumulators, Part 1
Developing an understanding of hydraulic capacitance helps eliminate pesky parasitic capacitances, and facilitates the overall application of circuit theorems in hydraulic design.
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