CONTROLLER FOR MOTOR

PROBLEM TO BE SOLVED: To carry out motor protection control at low cost reliability through simple circuitry. SOLUTION: When motors 9 and 10 are driven and controlled, HIGH-level enable signals E1 and E2 are outputted from a microcomputer 15, transistors 29 and 30 are turned ON to cause drives 20 an...

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Bibliographic Details
Main Authors ISOMURA TOSHIAKI, HASEBE MINORU
Format Patent
LanguageEnglish
Published 13.04.2001
Edition7
Subjects
CHAIRS FOR DENTISTRY
CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS
CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRICITY
FUNERAL DEVICES
GENERATION
HUMAN NECESSITIES
HYGIENE
MEDICAL OR VETERINARY SCIENCE
OPERATING TABLES OR CHAIRS
TRANSPORT OR ACCOMODATION FOR PATIENTS
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Summary:PROBLEM TO BE SOLVED: To carry out motor protection control at low cost reliability through simple circuitry. SOLUTION: When motors 9 and 10 are driven and controlled, HIGH-level enable signals E1 and E2 are outputted from a microcomputer 15, transistors 29 and 30 are turned ON to cause drives 20 and 21 to operate, and the microcomputer 15 drives and controls the drivers 20 and 21. If overcurrent flows through either of the motors 9 and 10 due to seized wheels or the like, a HIGH-level abnormal current detection signal K is outputted from an abnormal current detection circuit to a motor drive signal control circuit 25 to turn ON a thyristor 26. Thus, even if HIGH-level enable signals E1 and E2 are outputted from the microcomputer 15, the transistors 29 and 30 remain OFF and the drives 20 and 21 are forcedly stopped.
Bibliography:Application Number: JP19990272820