US 2019/0293312 A1 · VARIABLE FREQUENCY DRIVES SYSTEMS AND METHODS

Variable frequency drives systems and methods

AssigneeJohnson Controls Technology Company

InventorsRyan E. Hill, JR., Harold J. Dubensky, Sandeep K. Chodapaneedi, Lindsey C. Walker, Nivedita Nath, Keith L. Glatfelter, Bhushan D. Vichare, Gnanesh Suvvada, Siddappa R. Bidari, Justin M. Fantom, Deepak S. Kollabettu, William J. Skinner, JR., David A. Shearer, David P. Gillmen

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Abstract

A heating, ventilation, and air conditioning system includes an air moving device configured to move air through the HVAC system, a first variable frequency drive (VFD) configured to drive the air moving device, and a second VFD configured to drive the air moving device, wherein the first VFD and the second VFD are configured receive control instructions and to selectively operate based on the control instructions.

Claims23

Dependent claims

A heating, ventilation, and air conditioning (HVAC) system, comprising:

an air moving device configured to move air through the HVAC system;
a first variable frequency drive (VFD) configured to drive the air moving device;
and
a second VFD configured to drive the air moving device, wherein the first VFD and the second VFD are configured receive control instructions and to selectively operate based on the control instructions.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

15/957,597Filed 19 Apr 2018

Priority

20 Mar 2018

Published

26 Sep 2019

Term ends

Not estimatedThe source records don’t support an estimate.

Classification6 codes

F24F 11/32
For purposes related to the operation of the system, e.g. for safety or monitoring: responding to malfunctions or emergencies
F24F 11/61
Characterised by user interfaces or communication: using timers
F24F 11/74
For controlling the supply of treated air, e.g. its pressure: for controlling air flow rate or air velocity
F24F 11/88
Control or safety arrangements: electrical aspects, e.g. circuits