Lennox Industries Inc.

American Standard International Inc.

Trane International Inc.

Heatcraft Refrigeration Products LLC

Stephen J Vendt

Surendran Ramasamy

Melissa Del Carmen Amoros Sol

Arun Kunasekaran

Sunil K Khiani

Palanivel Subramaniam

Nasim Rahman

Raviganesh Thirumalaisamy

Aravind Sridharan

Steve Lazar

Wei Wang

Austin Clay Styer

Larry Stephen Bias

Melissa Amoros

Mark David Woodruff

Bruce K Lee

Shashwat Nath

Mohan Renganathan

Robert Wayne Helt

Michael Krasnicki

Daniel A Castillo

Gary C Jones

Lester D Sherrow

Jay Ernest Field

Roger L Boydstun

Bobby DiFulgentiz

Kirk W Beason

J Mark Hagan

Yan Yang

Michael Engler

Larry S Bias

Takeshi Sakai

Robert G Roycroft

Scott Anthony Salvage

Shannon Leigh Smith

Kishor Satish Gaikwad

Gabaza B Mlambo

A system for calibrating inductance at a motor comprises the motor, a motor drive circuit, and a processor operably coupled to the motor. The processor determines inductance map data that comprises a set of inductance values associated with a set of current values. The processor determines that the motor is in operation. In response, the processor determines current values with which the motor is being operated. The processor determines inductance values associated with the determined current values. The processor determines reference current values at the motor based on the determined inductance values. The processor also determines a speed, angle, flux, and torque associated with the motor based at least on the determined inductance values. The processor then controls the operation of the motor based on the determined reference currents, the speed, and the torque.

Motor inductance calibration system and method

An HVAC thermostat assembly has a wall-plate connector that includes a wall-plate and wire connectors as a whole that allows for a thinner, more aesthetic design. In one instance, the HVAC thermostat includes a display unit with a wall-plate connector recess having a plurality of electrical connector pins extending outward to mate with a wall-plate connector. The wall-plate connector includes a wall plate with incorporated electrical terminals. Other assemblies and systems are disclosed.

HVAC thermostat assembly and wall-plate connector

Wireless extender housing

HVAC sensor for wall mounting

HVAC thermostat

Surface-supported, HVAC sensor

A method of calibrating a motor assembly includes selecting an electric motor and a motor controller for the motor assembly, obtaining at least one electric motor parameter of the electric motor, determining a correction factor for the electric motor based upon the at least one electric motor parameter, and programming the motor controller with the correction factor.

Method of calibrating a variable-speed blower motor

Controller housing

HVAC controller housing

Refrigeration controller housing

Refrigeration control device

This disclosure is directed to an electronic thermostat for a heating, ventilation, and air conditioning (HVAC) system that includes an electronic level feature and leveling register that allow the thermostat housing to be rotated about a mounting wall plate to place the thermostat housing in a leveled position. In one aspect, the thermostat includes at least one accelerometer. Other systems and methods are disclosed.

Rotatable wall-mounted thermostat having a leveling feature

A system and method are disclosed that provide for a dual processor architecture in a furnace or HVAC controller. One processor can control non-safety-critical components and is operable to receive software updates. The other processor can control safety-critical components and is not capable of being updated. Safety-critical components can comprise a flame sensor, gas valve and an igniter.

Furnace control board architecture

A user interface for use with an HVAC system, a method of providing service reminders on a single screen of a user interface of an HVAC system and an HVAC system incorporating the user interface or the method. The user interface includes a display configured to provide information to a user, a touchpad configured to accept input from the user, and a processor and memory coupled to the display and the touchpad and configured to drive the display, wherein the display further configured to provide a button that allows a user to adjust an attribute of text displayed on the display.

Heating, ventilation and air conditioning system user interface having adjustable fonts and method of operation thereof

Growing community of inventors

Lewisville, TX, United States of America

Stephen J Vendt