Abstract: A heating, ventilation, and air conditioning (HVAC) system is described that includes a first unit and a second unit. The first unit comprises a controller configured to output a coded compressor activation signal that is based at least partially on a compressor run signal received from a thermostat. The second unit comprises at least a compressor relay. The second unit is configured to receive and decode the coded compressor activation signal from the first unit and is operable to operate the compressor relay based on the decoded content of the coded compressor activation signal.

Abstract: A system for selecting and managing course materials utilizes websites having faculty, administrator, and publisher services pages. The faculty services page is accessible by faculty members to adopt specific course materials for specific courses. The website includes an administrative services page which is accessible by administrators to input course information and to review the course materials adopted by the faculty members and a publisher services portal which is accessible by publishers to review purchase information related to course materials adopted by the faculty members. A student services website is accessible by students to purchase adopted course materials for specific courses.

Abstract: A thermostat transducer module includes a processor, at least one A/D conversion circuit interfaced to the processor, and at least one output level conversion circuit interfaced to the processor. The processor is configured to receive signals originating at a thermostat through the at least one A/D conversion circuit, analyze the received signals and generate signals based on the analysis for output through the at least one output level conversion circuit for control of a motor.

Abstract: A method for reducing a length of a motor is described. The method includes engaging a motor enclosure at a first end with a motor winding assembly, inserting a mid shield into the motor enclosure from a second end of the enclosure, and fastening the mid shield to the motor winding assembly. The method further includes engaging the second end of the motor enclosure with a motor control unit, at least a portion of the motor control unit within the motor enclosure, and fastening the motor control unit to the mid shield.

Abstract: A motor is described that includes a motor enclosure, a motor-bearing assembly, a motor control unit, and a mid shield. The motor-bearing assembly is configured for placement within the motor enclosure, and a portion of the motor control unit is configured for placement within the motor enclosure. The mid shield is configured for placement within the motor enclosure between the motor control unit and the motor-bearing assembly. The mid shield is further configured to allow removal of the motor control unit without disturbance of the motor-bearing assembly.

Abstract: An electric motor includes a motor enclosure, a motor-bearing assembly, a motor control unit, a mid shield, and a bearing. The motor-bearing assembly is configured for placement within the motor enclosure and has a shaft extending therefrom. A portion of the motor control unit is configured for placement within the motor enclosure. The mid shield is configured for placement within the motor enclosure between the motor control unit and the motor-bearing assembly and further configured to engage the shaft. The bearing is configured to seat within the mid shield and provide at least a portion of the engagement between the shaft and the mid shield.

Abstract: A motor is described that includes a motor enclosure, a motor winding assembly, a motor control unit, and a mid shield. The motor enclosure includes a plurality of protrusions into the motor enclosure in a substantially configuration around its perimeter and the motor winding assembly is configured for placement within the motor enclosure. A portion of the motor control unit is configured for placement within the motor enclosure and the mid shield is configured for placement within the motor enclosure between the motor control unit and the motor winding assembly where it engages the protrusions upon insertion into the enclosure.

Abstract: Methods and apparatus for controlling a motor are provided. The motor may be operated in a fluid system having a variable static pressure acting on the motor. The method including operating the motor at a first substantially constant torque level, varying the static pressure of the system, receiving a torque selection signal from external to the motor, and operating the motor at a second substantially constant torque level, the level corresponding to the torque selection signal.