eape02.pdf

Inverter Application Example

Machine

name Roof fan Classification Fan and pump No. AP-E-02

Application Building ventilation Similar application Ventilation fans of various types

<<Purpose>> Noises from the fan for the range hood exhaust is reduced.

<<Effect>> Complains of noises by the people on the upper floors of a building is eliminated at nighttime.

<<Composition>>

Ventilation roof fan (multi units)

Inverter panel

Range hood

<<Outline and points of operation>>

Since noises are not a problem during daytime, the fan

speed is reduced to lower the noise only during nighttime.

A timer is used to control the rotation speed in order to

reduce the need for manual control.

<<Specifications required>>

• Multiple fans on the roof

• One inverter is used for control.

<<Advantages of inverter application>>

Since the speed is varied as desired, it can be easily

changed according to the number of unit in the building.

<<Points to care>>

(1) In order to reduce the noise, it is necessary to use a

low audible noise type inverter.

(2) It is necessary to install the radio noise filter for

electrical noise countermeasure.

(3) If any inverter storage is installed on the roof (outdoor),

it is important to take a countermeasure against the

elements.

Issued date: February, 2001

Mitsubishi Electric, Nagoya Works Inverter Engineering Section