FAN MOTOR CONTROLLER AND HEAT PUMP HOT-WATER SUPPLY SYSTEM OF HOT WATER STORAGE TYPE WITH FAN MOTOR CONTROLLER INSTALLED ON HEAT PUMP UNIT

摘要

PROBLEM TO BE SOLVED: To provide a fan motor controller capable of maintaining as a high rotational speed as possible while reducing power consumption of a fan motor to a degree that an overheat protection function comes no action during head wind, and to provide a heat pump hot-water supply system with the fan motor controller installed on a heat pump unit.;SOLUTION: The fan motor controller, PWM-controlling a fan motor 19 on the basis of a duty ratio calculated by PI control so that a detected rotational speed reaches a target rotational speed, includes duty ratio limiting means for limiting the duty ratio for PWM control to an upper limit value or less corresponding to a detected rotational speed of the fan motor 19.;COPYRIGHT: (C)2014,JPO&INPIT