公开(公告)号：US20180045206A1

公开(公告)日：2018-02-15

申请号：US15235998

申请日：2016-08-12

Applicant: Illinois Tool Works Inc.

Inventor： Daniel J. Birk ,  Brian Skelton ,  Jackson Wilson

IPC: F04D27/00 ,  B01D46/00 ,  B01D46/46 ,  F04D25/08

CPC classification number: F04D27/004 ,  B01D46/0045 ,  B01D46/2411 ,  B01D46/44 ,  B01D46/46 ,  B01D2273/30 ,  F04D25/08 ,  F04D27/001 ,  F04D27/008 ,  F05B2240/20 ,  F05B2270/101 ,  F05B2270/327 ,  F05B2270/706 ,  F05D2270/46 ,  F05D2270/804 ,  G05B19/042

Abstract: The present disclosure describes an air filtration device that operates a fan-speed sensor error elimination process. The air filtration device uses a PID control module to ensure its fan operates at a desired fan speed. The fan-speed sensor error elimination process ensures that the air filtration device's controller does not send a measured fan speed determined using data that represent the time it takes the fan blade to complete a fraction of a revolution to the PID control module. This ensures the PID control module accurately controls electrical current supplied to the fan motor.