Draft inducer motor control system
AssigneeJohnson Controls Tyco IP Holdings LLP
InventorThomas D. Chase
Life of this patent
Estimating the term…
Abstract
Embodiments of the present disclosure are directed to a furnace that includes a blower configured to operate to force a fluid through the furnace, a motor having a rated speed, in which the motor is coupled to and configured to actuate the blower, and a controller configured to receive data indicative of an operating characteristic of the furnace and regulate operation of the motor to be at or below an operational speed limit. The controller is configured to set the operational speed limit based on the data indicative of the operating characteristic of the furnace, such that the operational speed limit is less than or equal to the rated speed of the motor.
Claims12
A controller for a furnace system, wherein the controller is configured to:
- determine an operational speed limit of a motor of the furnace system based on an operating characteristic of the furnace system, wherein the motor is coupled to and configured to operate a blower to direct a working fluid through the furnace system, the operational speed limit is less than or equal to a rated speed of the motor, and the rated speed is indicative of an upper speed threshold at which the motor is capable of being operated;
- identify an operating speed for the motor based on additional data indicative of an operating parameter of the furnace system;
- determine the operating speed of the motor based on a target rate at which the blower directs the working fluid through the furnace system;
- and
- operate the motor at the operating speed in response to determining that the operating speed is at or below the operational speed limit.
A controller for a furnace system, wherein the controller is configured to:
- receive data indicative of an operating characteristic of the furnace system;
- reference supplemental data correlating a plurality of operational speed limit values of a motor of the furnace system with respective associated operating characteristics;
- set an operational speed limit of the motor at an operational speed limit value of the plurality of operational speed limit values based on reference to the supplemental data indicating that the operational speed limit value correlates with the operating characteristic, wherein the motor is configured to operate a blower to direct a fluid through the furnace system, the operational speed limit is less than or equal to a rated speed of the motor, and the rated speed is a maximum speed at which that the motor is capable of being operated;
- determine an operating speed for the motor based on additional data indicative of an operating parameter of the furnace system;
- determine the operating speed is at or below the operational speed limit;
- and
- operate the motor at the operating speed in response to determining that the operating speed is at or below the operational speed limit.
Dependencies are inferred from the claim text.