| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that a ventilation air quantity in ventilation air quantity control is displaced large from a target ventilation air quantity due to unevenness of a power source voltage value and a power IC built in a motor, in regard to a ventilation air quantity control device with a PWM (Pulse Width Moduration) control type DC brush-less motor loaded thereon, controlled in the number of revolution per unit time by rectifying the power source voltage, for example, at 100 V and inputting it to the motor to switch at a duty proportioned to the command voltage. SOLUTION: A requested number of revolution per unit time of the motor for every different loss of the exhaust pressure in air quantity instructed by a ventilation air quantity instructing means such as a remote controller is stored as a map in the control unit, and the number of revolution per unit time of the motor is constantly controlled at the requested number of revolution per unit time of the motor called out of the control unit as a target number of revolution per unit time in response to the exhaust pressure loss in a real execution field. COPYRIGHT: (C)2004,JPO&NCIPI |
