Abstract: An electric machine includes a motor having a motor chassis having a first and second end, a stator assembly, and a rotor assembly. The electric machine includes a motor control assembly having a circuit board. The motor control assembly is attached to the stator assembly of the motor. A first end shield is attached to the first end of the motor chassis. The first end shield includes a first opening that is configured to enable a cooling air stream to pass therethrough to cool the motor and the motor control assembly.

Abstract: An electric machine includes a motor having a motor chassis having a first and second end, a stator assembly, and a rotor assembly. The electric machine includes a motor control assembly having a circuit board. The motor control assembly is attached to the stator assembly of the motor. A first end shield is attached to the first end of the motor chassis. The first end shield includes a first opening that is configured to enable a cooling air stream to pass therethrough to cool the motor and the motor control assembly.

Abstract: A method for fabricating a motor is described that includes attaching a circuit board of a motor control assembly to a first side of a mounting adapter, and attaching a second side of the mounting adapter to a stator assembly.

Abstract: Protection of a motor controller from a transient voltage is described. A method for protecting a motor controller from a transient voltage includes providing an electromagnetic interference (EMI) filter having at least a first input terminal, a second input terminal, a first output terminal, and a second output terminal, the EMI filter configured to suppress electromagnetic interference. The method also includes coupling a first voltage clamping device and a second voltage clamping device in series between the first output terminal and the second output terminal. The method also includes coupling a spark gap device to a ground conductor and to a shared node between the first voltage clamping device and the second voltage clamping device.

Abstract: A method for fabricating a motor is described that includes attaching a circuit board of a motor control assembly to a first side of a mounting adapter, and attaching a second side of the mounting adapter to a stator assembly.

Abstract: Protection of a motor controller from a transient voltage is described. A method for protecting a motor controller from a transient voltage includes providing an electromagnetic interference (EMI) filter having at least a first input terminal, a second input terminal, a first output terminal, and a second output terminal, the EMI filter configured to suppress electromagnetic interference. The method also includes coupling a first voltage clamping device and a second voltage clamping device in series between the first output terminal and the second output terminal. The method also includes coupling a spark gap device to a ground conductor and to a shared node between the first voltage clamping device and the second voltage clamping device.

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 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: 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: 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: 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 mid shield, and a motor control unit having a chassis and a plurality of components mounted on the chassis. The motor enclosure includes a plurality of protrusions extending into the motor enclosure. The mid shield is configured for placement within the motor enclosure and configured to engage the protrusions. The mid shield is configured with a plurality of open spaces. The chassis of the motor control unit is configured to engage an end of the motor enclosure and the motor control unit is configured such that at least a portion of the components extend into the motor enclosure and the spaces in the mid shield.

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.

Abstract: An ac-ac power converter system is provided for supplying power to an electrical load. The ac-ac power converter system provides an output voltage having variable amplitude and/or frequency. The ac-ac power converter system includes a boost inductor for applying a discontinuous current to an ac-ac power converter. The ac-ac power converter includes a rectifier circuit comprising of a first set of gate controllable active switches for converting an input ac power to a dc power and an inverter circuit comprising of a second set of gate controllable active switches for converting the dc power to an output ac power. In addition, the ac-ac power converter system includes a switch for switching between a first mode of operation and a second mode of operation.

Abstract: A flexible quadrature coil circuit is provided for use in an electronically commutated dynamoelectric machine for sensing the angular rotational position of a rotor relative to a stator. The stator has a plurality of stator teeth, with each tooth having an inwardly facing arcuate surface with at least one elongated rib and a channel disposed along a vertical axis of the tooth. The flexible circuit includes a flexible electrically nonconductive substrate with at least one slot formed in the substrate. The slot is configured to receive the corresponding rib so as to releasably secure the substrate to the arcuate surface of the stator tooth. At least one continuous electrical conductor is embedded in the substrate in a serpentine manner so that the continuous conductor forms a plurality of spaced apart conductor portions disposed between selected slots.

Abstract: A flexible quadrature coil circuit is provided for use in an electronically commutated dynamoelectric machine for sensing the angular rotational position of a rotor relative to a stator. The stator has a plurality of stator teeth, with each tooth having an inwardly facing arcuate surface with at least one elongated rib and a channel disposed along a vertical axis of the tooth. The flexible circuit includes a flexible electrically nonconductive substrate with at least one slot formed in the substrate. The slot is configured to receive the corresponding rib so as to releasably secure the substrate to the arcuate surface of the stator tooth. At least one continuous electrical conductor is embedded in the substrate in a serpentine manner so that the continuous conductor forms a plurality of spaced apart conductor portions disposed between selected slots.