Abstract: In an exemplary embodiment, a motor assembly includes a shaft and a compound fan assembly that provides axial and centrifugal air flow. The fan assembly includes a body including an outer surface, a cavity defined by the body outer surface, a plurality of first blades extending radially outwardly from the body outer surface, and a plurality of second blades disposed within the cavity. The shaft is concentric with the body and the second blades are rotatably coupled to the shaft.

Abstract: A method for regulating a coupling formation includes sensing a temperature of a coupling with a non-contact sensor and sending the temperature to a control unit that regulates the temperature of the coupling formation. In addition, a system for regulating a temperature of a coupling formation includes a temperature control unit and a non-contact sensor in flow communication with the temperature control unit.

Abstract: A molded case circuit breaker that includes a double headed calibration screw. The calibration screw has a first and second end with identical convex tip surfaces and screw driver engagement surfaces. The convex tip surface is suitable for engaging a bi-metal thermal overload element. The screw driver engagement surface is suitable for applying a screw driver to adjust the calibration screw position in order to adjust the deflection of the bimetal and calibrate the thermal overload protection. At least one calibration screw planar surface allows for improved sealant injection to permanently fix the screw position and associated calibration setting following adjustment.

Abstract: A method for determining optimum enamel die sizes for each of a plurality of dies for fabricating magnet wire includes a series of calculations based upon an empirically determined build factor for each of the enamel coatings used in the fabrication process. The build factor is a measure of the effective diameter increase of a wire passed through a coating die when the diameter of the wire entering the die is known and a selected thickness of wet enamel coating exiting the die is known. The build factor a given enamel coating is primarily dependent upon only the solids content of the enamel coating solution, and is largely independent of the chemistry of the coating solution. A simple relationship between build factor, die size, and wire size allows consistent fabrication of magnet wire in accordance with pre-selected specifications and with virtually no scrapped wire due to oversized final wire diameters.

Abstract: Methods and apparatus for minimizing electrical machine vibration are described. In an exemplary embodiment of the method, power is applied to the motor under microprocessor control such that a pulse modulated current profile is applied to the motor which in turn controls the amount of torque generated by the motor. By adjusting current profiles, torque generation is controlled, and vibration and noise are eliminated.

Abstract: A method and relay for magnetizing inrush restraint in protective relays for power transformers. The method utilizes the phase angle relation between the fundamental component and the second harmonic in addition to the magnitude ratio. This is accomplished by calculating and utilizing the complex second harmonic ratio. The specially shaped operating characteristic for the complex second harmonic ratio is made dynamic providing for better security without jeopardizing dependability of the transformer protective relay.

Abstract: An energy efficient low-power integral electronically commutated fan motor and control circuit assembly mounted on a circuit board for use in refrigerators utilizing a Hall sensor to provide positional control signals for sequential energization of the windings with the Hall sensor energization being pulsed, and the motor stator windings energized only during a portion of the period, when rotational torque produced by the energization is greatest in order to reduce the power input to the assembly. Integrally molded multi-function components including the coil bobbin, ground pin, Hall sensor holder, motor bearing oil well covers, and assembly housing provide positioning, support, and securing assistance along with electrical and magnetic operative connections and positioning.

Abstract: A motor assembly includes a control sub-assembly configured to be mounted either remotely or integrally to a motor. The control sub-assembly includes a control housing, a control housing cover, electronic control components, and at least one sensing wire connected to the motor. The control housing cover includes a first attachment portion and a second attachment portion. The first attachment portion attaches the control housing cover to the control housing and the second attachment portion attaches the control housing cover to the motor. If the control sub-assembly is to be mounted remotely from the motor, the second attachment portion is not connected to the motor.

Abstract: A passive automatic overhead door system (10) which automatically activates a remote door operating device (17) through communication with a global positioning system (18). A vehicle (12) equipped with a GPS receiver (14) and a GPS controller (16) is capable of communicating information to automatically activate a remote door operating device (17) based on predefined vehicle locations and predefined travel directions stored in the GPS controller (16). After programming the GPS controller (16) through a user interface (19) located on board the vehicle (12), there is no further action required from a vehicle's operator in order to activate the remote door operating device (17).

Abstract: A sump pump motor switch assembly for a sump pump including a motor casing and an end shield, includes a switch assembly and a housing mounted to the end shield. A cam actuator is connected to the housing and a sump pump actuation switch is mounted with the cam actuator. A motor actuation switch is also mounted with the cam actuator body. The sump actuation switch and the motor actuation switch are snap action switches that are simultaneously actuated by the cam actuator. The switch assembly includes a snap fitting assembly configured to fit into a receiving retainer within the motor casing.

Abstract: A mimic filter which can be implemented in analog or digital circuitry, and which removes dc offset or other noise from an input signal using a pseudo-differentiation technique. The input signal is adjusted by a feedback value, and the adjusted signal is amplified by a proportional gain factor to generate an output signal. The feedback value is determined by integrating the output signal and multiplying the integration by an integration gain factor. The mimic filter avoids the generation of false signal spikes.

Abstract: A protective relay, system, and relay operation method which allows logic functions to be distributed amongst multiple protective relays associated with a power distribution system. The protective relays include communications ports for exchanging messages over a peer-to-peer communications network, and include programmable logic. Each protective relay receives logic operands contained in the messages from remote protective relays, executes logic equations using the received operands, provides protective control if needed, and outputs operands to other protective relays.

Abstract: A procedure and method for eliciting expert information on process capability and thereafter manipulating the elicited information in such a manner that it can effectively be used in a process capability database that is operating in a six sigma regime. The manipulation preferably includes converting the expert elicited information from a tolerance-type metric to a short term standard deviation (or sigma) metric, whereby the result of the manipulation is used to populate directly a process capability database and, as appropriate, thereby augment, replace or modulate the data already stored therein.

Abstract: A mounting assembly for an electric motor with deep drawn endshields includes a resilient outer ring and a split inner ring for gripping engagement with an outer surface of a bearing endshield. The gripping engagement is sufficient to hold the mounting assembly to the motor but insufficient to deform the endshields. The inner ring is distanced slightly from first and second ends of the mounting assembly to isolate and damp motor vibration and prevent vibration transmission to a mounting base.

Abstract: The present invention, in one embodiment, is a method for controlling data flow in an electronic electric meter. The method includes steps of measuring current and voltage of a power source; determining a set of internal quantities using the measured current and voltage; using the set of internal quantities in conjunction with a set of functions to determine measurement profile quantities; and storing the determined measurement profile quantities in registers within the meter.

Abstract: A connection assembly for facilitating connection between a terminal block and a module containing protective relay circuitry. The assembly includes a keycode plate molded to align with and fit over terminal block connection elements extending through openings provided in the keycode plate. The assembly also includes one or more keycode elements fitting into keycode element reception areas provided in the keycode plate, and a module cover having pre-existing slots located and dimensioned so as to align with and receive corresponding keycode elements. The assembly substantially ensures that the correct module is connected to a correct terminal block and substantially prevents an incorrect module from being connected to an incorrect terminal block.

Abstract: A gating system for vertical die casting of a squirrel cage rotor includes an upper end ring cavity, a lower end ring cavity, and a plurality of passages in fluid communication with the upper and lower end ring cavities for forming rotor bars. A gate is radially distanced from the passages, and molten metal is injected into the lower end ring cavity and fills the lower end cavity before filling the passages. The passages are therefore filled at approximately the same time and rate until the passages are full and the upper end ring cavity fills with molten metal.

Abstract: A method for controlling an electronically commutated motor (ECM) using an air moving system including a controller and an interface board, the interface board electrically coupled to the controller. The ECM electrically coupled to the interface board. The ECM includes a motor controller having an ECM program and the interface board includes a mode signal circuit and a tap signal circuit. The method includes transmitting control signals to the interface board, translating the signals into signals suitable for controlling the ECM, and operating the ECM based on the translated signals.

Abstract: A system for motor thermal protector device performance test data collection includes a microprocessor configured to measure elapsed times of reset and trip power cycles of a motor winding through a thermal protector device. An operator interface terminal is coupled to the microprocessor and includes a display and input selectors for recalling a predetermined number of elapsed reset and trip times stored in a system memory.

Abstract: A stator yoke formed with a plurality of layers of similarly sized metal sheets is disclosed. A plurality of gaps extend through the stator yoke between ends of the metal sheets. The gaps decrease in size from an outer layer to an inner layer of the stator yoke. The stator yoke can be formed to have a limited tolerance even when the metal sheets do not have limited tolerances.