| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a motor drive preventing conduction to an inverter at the time of stopping a permanent magnet motor and preventing repetition of driving and deceleration of a motor and to provide a motor apparatus having the motor drive. <P>SOLUTION: A rectifier 1 of the motor drive 200 rectifies AC voltage supplied from an AC power supply 400 through a switch 300. DC voltage smoothed by a smoothing capacitor 2 is converted into AC by the inverter 4 and a brushless DC motor 101 is driven. A reduction gear 102 transmits deceleration of rotation of the motor 101 to an inertial body 500 with large inertia. When a state where AC voltage which an AC voltage detector 5 detects is less than 60 V continues for 100 ms, AC voltage is detected to be not supplied from the AC power supply 400 and conduction to the inverter 4 is stopped. <P>COPYRIGHT: (C)2010,JPO&INPIT |
