ABNORMALITY DETECTOR AND MOTOR CONTROLLER THEREWITH

PROBLEM TO BE SOLVED: To provide an abnormality detector and a motor controller therewith, capable of improving the reliability in detecting abnormalities and minimizing damages to a motor. SOLUTION: This abnormality detector for detecting some abnormality of a DC motor 21, in which the rotational s...

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Bibliographische Detailangaben
Hauptverfasser:	MURASHIGE YOSHINORI, TANJI HIDEKI, TAKASU TAKESHI
Format:	Patent
Sprache:	eng
Schlagworte:	CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide an abnormality detector and a motor controller therewith, capable of improving the reliability in detecting abnormalities and minimizing damages to a motor. SOLUTION: This abnormality detector for detecting some abnormality of a DC motor 21, in which the rotational speed is controlled by a switching system, is installed with a pulse duration detector 3, which obtains a control pulse signal used in controlling the DC motor 21 and determines whether the pulse duration of the control pulse signal is beyond the standard pulse duration. Preferably, the DC motor 21 is controlled by using a switching device 13 for generating a control pulse signal by switching and a feedback device for adjusting the time interval of switching by the switching device, based on the control pulse signal. COPYRIGHT: (C)2007,JPO&INPIT