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US4136304: Control device for a braking mechanism using an energy-storing spring

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Filing Information

Inventor(s) Urs Baechler · Pierre Riondel ·
Assignee(s) Brown, Boveri & Co. Ltd. ·
Attorney/Agent(s) McGeady and Stanger Toren ·
Primary Examiner James R. Scott ·
Assistant Examiner John J. Feldhaus ·
Application Number US5688095
Filing date 05/18/1976
Issue date 01/23/1979
Predicted expiration date 05/18/1996
U.S. Classifications 318/372  · 185/40R  ·
International Classifications H02K 710  ·
Kind CodeA
International Classifications 18540 R;44 ·
Foreign Priority CH698575 - 05/30/1975 ·
14 Claims, No Drawings


Abstract

A control system for use with a braking mechanism which employs an energy-storing spring and an electric rotating servomotor is disclosed. The system operates employing a direct or indirect measurement of the stored braking force. When an indirect approach is used, a pair of selsyns supply a measured rotational parameter which is related to braking force. After suitable processing, which includes the use of a discriminator and counter, a parameter relating to the stored braking force is compared with a desired value at a summing point to provide a correction parameter for braking control. When direct braking force measurement is used, the measured braking force is supplied directly to a summing point for comparison with a desired value. In both direct and indirect measurement, a differentiator is included which supplies the derivative of the measured value to the summing point. The output of the summing point is a correction parameter which operates triggering devices for brake actuation and release. These devices in turn control the motor and a brake control winding in the braking mechanism.

Independent Claims | See all claims (14)

  1. 1. In a control system for a braking mechanism of the type wherein the braking mechanism employs an energy-storing spring, an electric rotatable servomotor and a translationally movable spindle rod, the improvement comprising:means for measuring a parameter related to the stored braking force of said braking mechanism and wherein the servomotor includes a rotor and said stored braking force parameter measuring means includes means for determining the angular position of the servomotor rotor.
  2. 11. In a control system for a braking mechanism of the type wherein the braking mechanism employs an energy-storing spring, an electric rotatable servomotor and a translationally movable spindle rod, the improvement comprising:means for measuring a parameter related to the stored braking force of said braking mechanism, wherein said measured parameter is compared with a desired braking force at an algebraic summing point, which point is responsive to the desired braking force, to produce a correction force for controlling the braking mechanism.

References Cited

U.S. Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
US2693254 JACK & HEINTZ INC Barish Nov 1954
US3092742 CONVAL CORP Smith et al. Jun 1963
US3659683 Betzing May 1972
US3761790 Daab Sep 1973

Foreign Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
GB1442652HITACHI LTDJul 1976