Title:
DETERMINING AND HANDLING BRAKE FAILURE IN OPEN LOOP VARIABLE FREQUENCY DRIVE MOTORS
Document Type and Number:
WIPO Patent Application WO2005108269
Kind Code:
A3
Abstract:
A controller for a variable frequency drive monitors electrical power from a variable frequency drive motor while a brake is maintaining a load driven or moved by the motor without requiring additional feedback components of a closed loop configuration. If excess electrical power is being generated by the motor, an undesirable condition in the brake is indicated. Support or maintenance of the load is assumed by the motor in that event. Appropriate alarms or indicators are also activated.
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| JPS6231676 | SPEED CONTROLLER FOR ELEVATOR |
Inventors:
GHANEMI ACE (US)
PERKINS MICHAEL L (US)
ROESSLER MICHAEL J (US)
MCKEOWN KEVIN (US)
PERKINS MICHAEL L (US)
ROESSLER MICHAEL J (US)
MCKEOWN KEVIN (US)
Application Number:
PCT/US2005/015103
Publication Date:
August 03, 2006
Filing Date:
May 02, 2005
Export Citation:
Assignee:
ACE TRONICS COMPANY INC (US)
GHANEMI ACE (US)
PERKINS MICHAEL L (US)
ROESSLER MICHAEL J (US)
MCKEOWN KEVIN (US)
GHANEMI ACE (US)
PERKINS MICHAEL L (US)
ROESSLER MICHAEL J (US)
MCKEOWN KEVIN (US)
International Classes:
H02P23/00; B66B1/28; B66B5/02; H02P3/18; H02P3/22; H02P3/26; H02P23/14; H02P27/04
Foreign References:
| US5343134A | 1994-08-30 | |||
| US6614198B2 | 2003-09-02 | |||
| US6078156A | 2000-06-20 |
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