| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a blower device for realizing accurate air volume control regardless of a difference of characteristics due to an individual difference of a DC motor or a motor drive circuit. <P>SOLUTION: The blower device comprises: a blower 7 including a DC motor 9 and a blower fan 10 driven by the DC motor 9; a motor drive circuit 8 for driving the DC motor 9 by PWM drive by a duty corresponding to a command voltage; arithmetic means 4 for obtaining a command voltage for causing a current of the DC motor 9 to start increasing regardless of a pressure loss condition as a first command voltage at the duty 0% and a command voltage for eliminating current change of the DC motor 9 for which the voltage is increased from the first command voltage as a second command voltage at the duty 100%, and leading a relational expression of the command voltage and the duty in the motor drive circuit 8; and control means 6 for computing a third command voltage for obtaining a desired duty on the basis of the relational expression, and outputting the third command voltage to the motor drive circuit 8. <P>COPYRIGHT: (C)2013,JPO&INPIT |
