Abstract: A method is described for measuring a plurality of line voltages using a measurement circuit, the method including the steps of reducing each line voltage over a first impedance; providing a second impedance between each of the reduced voltages and a measurement circuit common reference point; coupling the common reference point to a voltage line N using a third impedance; and determining line voltage values using measurements of the reduced voltages. The above-described method provides impedance between voltage line N and measurement electronics and thus prevents transient voltages from entering the measurement circuit.

Abstract: During coiled hose and spring operations, a sheath reduces entanglements within a workstation and provides unrestricted access to manufacturing and assembly line pneumatic tools and equipment. The sheath includes a first end, a second end, and a body extending therebetween. The first and second ends are secured to a coiled device. The body defines a cavity sized to receive a portion of the coiled device therein. The sheath installs easily, is reliable, and is resilient to entanglements induced by coiled devices.

Abstract: An interface module includes a high density analog interface (HAI) for electrical interconnection between a programmable logic controller (PLC) and an analog to digital converter (ADC) or a digital to analog converter (DAC). The HAI includes a single application specific integrated circuit having a data scaling function block, a diagnostics function block configured to verify functionality of said scaling function block, a self-calibration function block configured to compensate for drift in said ADC, and a shared interface function block configured to electronically connect said module with a programmable logic controller (PLC).

Abstract: A cast end shield includes an opening extending therethrough and an insert at least partially embedded within the end shield at the opening. The end shield also includes a plurality of slots extending to the insert. In one embodiment, the insert is a substantially circular steel insert ring concentric with the opening and oriented such that an inner diameter of the insert ring is exposed from the end shield.

Abstract: A circuit board protection system includes a circuit board including at least one edge, an enclosure used to encapsulate the edge, and a seal. The seal encapsulates the edge and prevents liquid from contacting the edge. Accordingly, the circuit board is protected from liquid infiltration at the edge of the board. Additionally, a method for protecting a circuit board, including at least one edge, in a board enclosure includes applying encapsulating material to at least one of the board enclosure and the edge, and positioning the circuit board in the enclosure such that the edge is encapsulated.

Abstract: A method for facilitating the reduction of transmitted motor noise using a mounting system in a frame. The mounting system includes a motor assembly having an end bell, a mounting bracket including a brace, a plurality of attachment openings, a plurality of leaf springs attached to the brace and an anchor device attached to each leaf spring. Each anchor device includes a fastener opening and a grommet. The leaf springs and grommets are configured to filter and damp noise transmitted from the motor to the frame.

Abstract: An induction motor control system (10) for electric vehicles having a DC power supply (14), an inverter (16), an induction motor (12), a motor controller (26) and a vehicle-level controller (32). The method and system of the present invention optimizes the torque output for the induction motor and utilizes minimum power. The method and system of the present invention calculates the flux current such that the slip frequency is maintained at a nominal level, thereby producing peak torque.

Abstract: A service entrance barrier for a load center that includes a housing and a service entrance having at least one branch fed main breaker electrically connected to branch feed lines. The service entrance barrier is securable to the load center housing to prevent human contact with electrically energized parts located in the service entrance of the load center. The service entrance barrier includes a main body portion, at least one mounting leg extending from the main body portion, a protection tab extending from said main body portion, and a non-conductive sleeve encompassing the protection tab.

Abstract: An electronically commutated motor assembly permits a user to select discrete operating speed options to operate an electronically commutated motor. The assembly includes a motor, an input/output unit electrically connected to the motor, a connector and board and a microprocessor. The connector and board includes an electrically erasable programmable read-only memory (EEPROM), a plurality of low voltage signal connections for programming the EEPROM, and a plurality of speed signal connections for selecting an operating speed for the electronically commutated motor. The low voltage signal connections permit the EEPROM to be programmed with speed tables containing schedules of operating speeds.

Abstract: The present invention is to provide an improved strategy for actively controlling battery state of charge (SOC) as a function of the vehicle's kinetic energy. A vehicle system controller (VSC) can vary a target battery SOC as a function of vehicle speed based on either vehicle kinetic energy or the square of vehicle speed. The VSC can set a maximum battery SOC limit using vehicle velocity and actively control a rate of charging the battery and determine a target battery SOC as a balance between the charge time and the charge current. The VSC can determine a target battery SOC based on a predetermined constant and a predetermined offset value. Target battery SOC is increased as vehicle speed increases until the maximum battery SOC limit is reached.

Abstract: A method for reducing the starting time and reducing the peak phase currents for an internal combustion engine that is started using an induction machine starter/alternator. The starting time is reduced by pre-fluxing the induction machine and the peak phase currents are reduced by reducing the flux current command after a predetermined period of time has elapsed and concurrent to the application of the torque current command. The method of the present invention also provides a strategy for anticipating the start command for an internal combustion engine and determines a start strategy based on the start command and the operating state of the internal combustion engine.

Abstract: A control system comprising a processor develops data controlling a combustion engine and a dynamoelectric machine arranged to interact with the engine to modify the torque output of the engine. An observer (10) develops observed data that comprises estimated engine speed, estimated crankangle, and estimated engine output torque represented as an estimated average value torque component on which is superimposed an estimated alternating polarity ripple torque component whose mean value over a time interval of interest is substantially zero. The estimated alternating polarity ripple torque component is an input to a torque controller (102) for the dynamoelectric machine which causes the machine to contribute, in real time, torque that substantially cancels the alternating polarity ripple torque component in the crankshaft torque.

Abstract: A vehicle system controller (20) is presented for a LSR parallel hybrid electric vehicle having an engine (10), a motor (12), wheels (14), a transmission (16) and a battery (18). The vehicle system controller (20) has a state machine having a plurality of predefined states (22-32) that represent operating modes for the vehicle. A set of rules is defined for controlling the transition between any two states in the state machine. The states (22-32) are prioritized according to driver demands, energy management concerns and system fault occurrences. The vehicle system controller (20) controls the transitions from a lower priority state to a higher priority state based on the set of rules. In addition, the vehicle system controller (20) will control a transition to a lower state from a higher state when the conditions no longer warrant staying in the current state. A unique set of output commands is defined for each state for the purpose of controlling lower level subsystem controllers.

Abstract: A system (10) and method (100) for connecting and synchronizing a supplemental power supply (10) and a power grid. The present invention detects current feedback signals ia and ib and grid phase voltage input signals Ua—g, Ub—g, and Uc—g for controlling and synchronizing the three-phase output voltages Ua—p, Ub—p, and Uc—p, of the supplemental power supply (10) with the power grid. The method (100) of the present invention detects the three-phase voltages of both the supplemental power supply, Ua—p, Ub—p, Uc—p and the power grid Ua—g, Ub—g, Uc—g, and converts the detected voltages into components Ud—com, Uq—com on a d-q plane.

Abstract: An induction motor control system (10) for electric vehicles having a DC power supply (12), an inverter (14), an induction motor (16), and a clamping unit (26). The clamping unit (26) applies a clamping value iq_clamp to a real torque current command iq*. The clamping value iq_clamp is calculated in a maximum torque current calculation unit 28 and is based on predetermined maximum settings for the motor power Pmax and torque Tmax. The clamping value iq_clamp is applied such that the torque current command iq* cannot exceed the clamping value iq_clamp, whereby the induction motor produces 16 output power Pout and torque Tout that is always less than the predetermined maximum settings, Pmax and Tmax.

Abstract: Apparatus for measuring electrolyte concentrations in fluid samples. The apparatus includes an ion selective electrode capable of generating a voltage differential having a magnitude related to the concentration of the corresponding electrolyte in the sample. A voltage to optical transducer circuit is provided to convert the voltage differentials to a digital code and then to an optical signal which is related to the concentration of the electrolytes. The optical signals are suitable for detection by conventional optical detector apparatus of assay instruments. A passive duplex transfer is utilized to simultaneously read one optical signal while transferring the next bit of the digital code. The duplex transfer configuration also makes novel use of the photodetection properties of an LED.