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Title: US5349276: Control system for regulating motor speed
[ Derwent Title ]

Country: US United States of America

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14 pages

Inventor: Mezzatesta, Jr., Frank; Glendale, CA
Young, Donald M.; Los Angeles, CA

Assignee: The Walt Disney Company, Burbank, CA
other patents from WALT DISNEY COMPANY (617665) (approx. 101)
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Published / Filed: 1994-09-20 / 1993-04-27

Application Number: US1993000054541

IPC Code: Advanced: B60L 3/00; G01P 3/48; H02H 7/093;
IPC-7: G01P 3/48; H02H 7/08; H02P 5/00;

ECLA Code: B60L11/18L2C; B60L3/00F; G01P3/48; H02H7/093; Y02T10/70B; Y02T10/70J4B; Y02T90/12J; Y02T90/14;

U.S. Class: Current: 318/268; 318/434; 318/464; 388/903; 388/909;
Original: 318/268; 318/434; 318/464; 388/903; 388/909;

Field of Search: 318/565,652,653,640,647,463,254,590,602,618,135,138,139,268,271,272,434,439,464,490,494,495,496 388/809,814,816,820,903,907.5,909

Priority Number:
1993-04-27  US1993000054541
1992-02-28  US1992000843604

Abstract:     A motor control system accurately and reliably controls the speed of a motor so that the motor operates in accordance with a predetermined motor speed profile, and therefore does not exceed a predetermined safe speed, decelerates at a controlled rate, maintains a safe minimum speed, and does not turn in reverse. If the motor operates out of these limits, a malfunction is indicated and the control system halts operation of the motor. The motor speed is determined using an electronic tachometer that analyzes the current in at least two phases of the motor to provide extremely precise and reliable velocity information for the motor.

Attorney, Agent or Firm: Pretty, Schroeder, Brueggemann & Clark ;

Primary / Asst. Examiners: Ro, Bentsu;

Maintenance Status: CC Certificate of Correction issued

INPADOC Legal Status: Show legal status actions          Buy Now: Family Legal Status Report

Related Applications:
Application Number Filed Patent Pub. Date  Title
US1992000843604 1992-02-28       

Parent Case:     This application is a division of a currently pending application, application Ser. No. 07/843,604, filed on Feb. 28, 1992.

Designated Country: EP JP 

Family: Show 3 known family members

First Claim:
Show all 20 claims
We claim:     1. A control system for regulating the speed of a motor having a rotatable rotor and windings that define poles of the motor, the control system comprising:
  • a variable frequency drive that produces a drive signal that is provided to the windings of the motor to cause rotation of the rotor;
  • speed means for providing a speed signal that indicates the actual speed of the rotor;
  • monitor means for receiving the speed
  • signal and generating monitor signals that indicate motor performance relative to a speed profile of desired :motor speed during operation of the motor; and
  • control means for receiving the monitor signals and comparing the monitor signals with predetermined expected values, and for indicating a failure condition if an unexpected value is obtained and if the unexpected value persists for greater than a predetermined time interval.

Background / Summary: Show background / summary

Drawing Descriptions: Show drawing descriptions

Description: Show description

Forward References: Show 18 U.S. patent(s) that reference this one

U.S. References: Go to Result Set: All U.S. references   |  Forward references (18)   |   Backward references (21)   |   Citation Link

Patent  Pub.Date  Inventor Assignee   Title
Get PDF - 10pp USRE32857  1989-02 Luneau  Resolvex Corporation Brushless tachometer/synchro
Get PDF - 5pp US1438616* 1922-12 Staege    
Get PDF - 8pp US3757183  1973-09 Nola  The United States of America as represented by the Administrator of the National Aeronautics and Space Administration REDUNDANT SPEED CONTROL FOR BRUSHLESS HALL EFFECT MOTOR
Get PDF - 4pp US3916272  1975-10 Grunleitner et al.  Siemens Aktiengesellschaft Speed control for an electronic commutated d-c motor
Get PDF - 14pp US3969659  1976-07 Thode  General Dynamics Corporation Alternating current motor system
Get PDF - 19pp US4078189  1978-03 Nash et al.  Harnischfeger Corporation Control system for regulating the torque and speed of an electric motor including static frequency detector for speed detection and regulation
Get PDF - 16pp US4208621  1980-06 Hipkins et al.  Electro-Craft Corporation Brushless DC motor control system
Get PDF - 13pp US4228396  1980-10 Palombo et al.  Dataproducts Corporation Electronic tachometer and combined brushless motor commutation and tachometer system
Get PDF - 20pp US4292577  1981-09 Cesarz et al.  Kearney & Trecker Corporation A.C. Motor control circuit
Get PDF - 7pp US4305025  1981-12 Arnold  The Singer Company Velocity servo with adaptive tachometer feedback
Get PDF - 19pp US4386398  1983-05 Matsuoka et al.  Hitachi, Ltd. Automatic door control apparatus
Get PDF - 23pp US4449082  1984-05 Webster   Motor speed control system
Get PDF - 4pp US4492902  1985-01 Ficken et al.  Allied Corporation Permanent magnetic motor common leg impedance compensation means
Get PDF - 7pp US4570110  1986-02 Bloom et al.  International Business Machines Corporation Programmable servo motor speed control apparatus
Get PDF - 8pp US4572999  1986-02 Coulon, Jr.  Kollmorgen Technologies Corporation Brushless tachometer
Get PDF - 32pp US4686437  1987-08 Langley et al.  Kollmorgen Technologies Corporation Electromechanical energy conversion system
Get PDF - 11pp US4712050  1987-12 Nagasawa et al.  Hitachi, Ltd. Control system for brushless DC motor
Get PDF - 8pp US4942344  1990-07 Devitt et al.  Moog Ltd. Control system for brushless motors
Get PDF - 19pp US5015927  1991-05 Reichard  Thor Technology Corporation Electric motor with regeneration current commutation
Get PDF - 12pp US5028852  1991-07 Dunfield  Seagate Technology, Inc. Position detection for a brushless DC motor without hall effect devices using a time differential method
Get PDF - 20pp US5076399  1991-12 Horbruegger et al.  Otis Elevator Company Elevator start control technique for reduced start jerk and acceleration overshoot
  * some details unavailable
Foreign References: None

Other Abstract Info: DERABS G1993-288581

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