MOTOR DRIVE UNIT
PROBLEM TO BE SOLVED: To detect with accuracy abnormalities of rotational position sensors 18, 19 by a simple logic, and to dispense with a microcomputer exclusive for monitoring. SOLUTION: A common rotating shaft 16 for rotatively driving the wheel of an electric automobile is driven by a pair of m...
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| creator | KATSUMATA SHIGEKI OKAMOTO SHOHEI HISAI SHIGEYUKI |
| description | PROBLEM TO BE SOLVED: To detect with accuracy abnormalities of rotational position sensors 18, 19 by a simple logic, and to dispense with a microcomputer exclusive for monitoring. SOLUTION: A common rotating shaft 16 for rotatively driving the wheel of an electric automobile is driven by a pair of motors 12, 13, the rotational position of each motor is detected by the individual rotational position sensors 18, 19 serving as resolvers, and rotational speeds N1, N2 are detected by individual rotational speed detection means based on outputs of the rotational position sensors. A subtraction means obtains a difference between the rotational speeds N1, N2 of the motors operated and detected by the rotational speed detection means, and a comparison means compares the difference with a previously set value NO. It can thereby be determined whether or not an abnormality occurs in at least either of the two rotational position sensors. COPYRIGHT: (C)2004,JPO |
| format | Patent |
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SOLUTION: A common rotating shaft 16 for rotatively driving the wheel of an electric automobile is driven by a pair of motors 12, 13, the rotational position of each motor is detected by the individual rotational position sensors 18, 19 serving as resolvers, and rotational speeds N1, N2 are detected by individual rotational speed detection means based on outputs of the rotational position sensors. A subtraction means obtains a difference between the rotational speeds N1, N2 of the motors operated and detected by the rotational speed detection means, and a comparison means compares the difference with a previously set value NO. It can thereby be determined whether or not an abnormality occurs in at least either of the two rotational position sensors. 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SOLUTION: A common rotating shaft 16 for rotatively driving the wheel of an electric automobile is driven by a pair of motors 12, 13, the rotational position of each motor is detected by the individual rotational position sensors 18, 19 serving as resolvers, and rotational speeds N1, N2 are detected by individual rotational speed detection means based on outputs of the rotational position sensors. A subtraction means obtains a difference between the rotational speeds N1, N2 of the motors operated and detected by the rotational speed detection means, and a comparison means compares the difference with a previously set value NO. It can thereby be determined whether or not an abnormality occurs in at least either of the two rotational position sensors. COPYRIGHT: (C)2004,JPO</abstract><edition>7</edition><oa>free_for_read</oa></addata></record> |
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| subjects | CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES ELECTRICITY ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS GENERATION INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES MEASURING MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION,OR SHOCK PERFORMING OPERATIONS PHYSICS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TESTING TRANSPORTING VEHICLES IN GENERAL |
| title | MOTOR DRIVE UNIT |
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