| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a motor drive device that restricts start-up current without being affected by environmental change without increasing the capacity of a power source particularly. <P>SOLUTION: The motor drive device comprises a motor 73 and 74 for driving load in a housing 9; current control means 60 for PWM controlling drive currents supplied to the motors 73 and 74 from a power source device 58; current detecting means 75 for detecting a power source current from the power source device 58; and a temperature detecting means 59 for detecting temperature in the housing 9. The current control means 60 sets a duty ratio for a PWM signal such that if the detection result C of the temperature detecting means 59 decreases below a specified temperature Clw during the start-up of each motor 73, 74, the detection result I of the current detection means 75 is made equal to or below a rating current Irt. <P>COPYRIGHT: (C)2012,JPO&INPIT |
