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A PUMP FOR THE MILLENNIUM

A DISCUSSION OF SOME ASPECTS OF AN ELECTRONICALLY CONTROLLED PUMP FOR UNIVERSAL APPLICATION AND SERIAL BUS COMMUNICATION

You first saw it in Hydraulics and Pneumatics Magazine, but this is the unabridged version, in all of its original, unedited details. If you are designing, using or maintaining electronically controlled pumps, or if you are considering doing so, then this publication is a must for your book shelf.

Now, you can get all the design details that cover the gamut of energy savings, servo stroking, serial bus communication, transducers galore, interconnection methods and even software. This is your chance to get a good overview of a complex subject, but in clear, lucid, easy-to-read form by a renowned teacher and communicator.

$39.95 – 61 pages of the latest and most up-to-date engineering information on the electronic control of hydraulic pumps

TABLE OF CONTENTS

PUMP VERSUS VALVE CONTROL

ADVANTAGE OF PUMP CONTROL OVER VALVE CONTROL

THE UNIVERSAL PUMP PROTOTYPE

VARIATIONS ON THE PROTOTYPE

THERE ARE BUSES IN YOUR FUTURE

Why do we want buses and bus technology?

Planning Hardware for Bus Communication

THE MILLENNIUM PUMP STRUCTURE

THE PUMP KERNEL AND ITS MODIFICATIONS FOR BUS USE

Issues Surrounding the Servo/Proportional Amplifier

The Sensors and Issues Involving Them

Pressure Sensor Issues

Speed Sensor Issues

Other Issues Regarding Speed Sensing

Issues Involving the use of DC Tachometers

Issues Involving Brushless DC Tachometers

Other Issues Involving Speed Sensing

Torque Sensing

Temperature Sensor

Thermocouple

Thermistor

General Comments Regarding Temperature Measurement

Displacement Sensing

Potentiometer as a Displacement Sensor

The LVDT Displacement Sensor

Issues Involving Mounting and Placement of Sensors

Some General Issues Involving Sensor Selection

HYDROMECHANICAL ASPECTS OF THE MILLENNIUM PUMP

UNIDIRECTIONAL PUMP OUTPUT APPLICATIONS

How will the computer know when to send the dump and undump signals to the dump/undump valve?

How does the system determine the actual direction of rotation and then set up the correctly corresponding direction of displacement change?

LOCAL CONTROL VERSUS CENTRALIZED CONTROL

PUMP PERFORMANCE PROFILES

Simple displacement variability

How does the command profile get into the local computer memory?

Pressure compensated operation

Load sense operation of the pump

Power limiting

BIDIRECTIONAL PUMP OUTPUT APPLICATIONS

Conventional Hydrostatic Transmission

Bipolar Speed Control with the

Hydrostatic Transmission

Bipolar Pressure Control with the

Hydrostatic Transmission

DIAGNOSTICS

Summary commentary

CONTROL COMPUTER AND BUS INTERFACING

SERIAL COMMUNICATION BUSES

Look over this detailed Table of Contents for the Millennium Pump, and see for yourself the breadth of subjects that are covered. This can be your easiest way to learn about electronic controls, because it starts with the pump, the very familiar hydraulic pump, and then proceeds to explain how all the electronic gadgets come together to give the control and communication that are necessary in today’s and tomorrow’s most useful applications.

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