| 摘要 |
A MOTOR DRIVING APPARATUS (1) ENABLING DIRECT PULSE WIDTH MODULATION DRIVING (DIRECT PWM DRIVING) IN A SO-CALLED SENSOR-LESS MOTOR. THE MOTOR DRIVING APPARATUS INCLUDES A COMPARISON UNIT (2A, 2B, 2C) FOR COMPARING BACK-ELECTROMOTIVE VOLTAGES APPEARING IN RESPECTIVE PHASES OF A MULTI-MOTOR, A PULSE WIDTH MODULATING UNIT (7) FOR OUTPUTTING PULSE WIDTH MODULATED SIGNALS FOR ROTATIONALLY DRIVING THE MOTOR BASED UPON A ROTATIONAL ERROR SIGNAL OF THE MOTOR, A MINIMUM PULSE WIDTH DETECTION UNIT FOR DETECTING THE MINIMUM PULSE WIDTH POSITION OF THE PULSE WIDTH MODULATION SIGNAL FROM THE PULSE WIDTH MODULATED MEANS (A), A SAMPLE-HOLDING UNIT FOR SAMPLE-HOLDING COMPARISON OUTPUTS OF THE COMPARISON MEANS (4) AT A TIMING OF DETECTION OF THE MINIMUM PULSE WIDTH OF THE PULSE WIDTH MODULATED SIGNAL FROM THE MINIMUM PULSE WIDTH DETECTION UNIT, AND A MOTOR DRIVING UNIT FOR ROTATIONALLY DRIVING THE MOTOR BASED UPON EACH SAMPLE-AND-HOLD OUTPUT FROM THE SAMPLE-AND HOLD UNIT. (FIG. 7)
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