Kordak R. Hydrostatic Drives with Secondary Control: An introduction into the drive concept and system characteristics

Second edition. — Lohr a Main: Mannesmann Rexroth GmbH, 1996. — 207 pages.II is hard to imagine any transport system or production process today without hydrostatic drives as hydro-mechanical energy converters. The ease of control in open and closed loop circuits makes it possible to meet the increasing demands for flexibility and precision of drives brought about by technical rationalisation.Secondary control has become increasingly important due to fact that its characteristics are much more comparable to electrical drives with closed loop control than lo conventional hydraulic drives. It is therefore no wonder that secondarv control and its associated closed loop control technology has gained considerable impetus through the demands of electrical drives. This has led to the development of a new kind of closed loop control technology. Secondary control fitted the bill, with its alreadv familiar structure and excellent dynamic response characteristics.This volume "Hydrostatic Drives with Secondary Control", as pari of The Hydraulic hairier series, aims to communicate to the reader the fundamental principles of secondary control.The Development of Secondary Control at Mannesmann Rexroth.
Basic Principle of Secondary Control.
Axial Piston Units Designed for Use with Secondary Control.
Dynamic Response of Secondary Controlled Drives.
Electronic Components of a Secondary Controlled Drive System.
Special Characteristics of Secondary Control.
Examples of secondary drives in industrial and mobile applications.
Examples of Applications in Test Stands and in Simulation Technology.
Low Loss Controls in a Hydraulic Ring Main System with Impressed Pressure.
The Speed-Variable Electrical Drive.
Information on Project Design of Secondary Controlled Drives.