Abstract: A Manchester decoder blanks random transitions prior to the reception of a valid Manchester encoded signal. Specifically, the decoder according to the present invention comprises a data input, and edge detector, and a blanking device. The edge detector is used to detect edges in a signal which is received by the data input. Thus, in the event that edges are not detected at predetermined intervals (signifying that a valid signal is not being received), the blanking device blanks a data output of the decoder. Advantageously, the decoder circuit filters random transitions prior to the reception of a valid Manchester encoded signal, is of simple construction, and may be implemented in conjunction with a decoder circuit which is used to separate the Manchester encoded signal into its data and clock components.

Abstract: A method and/or apparatus used with a thyristor based AC-AC motor controller in a discontinuous current mode for providing power to thyristor gate drivers. The apparatus includes a snubber network and two rechargeable capacitors for storing input line voltage to an inversely connected pair of thyristors when both the thyristors are off. Stored voltage is provided via a power lead to each thyristor driver to provide power thereto and thus the circuit operates in a self-powered manner.

Abstract: A digital filter with a reduced filtering time. On/off data provided by eight contacts are read at predetermined time intervals, and the on/off data are stored in 8-bit binary data. (four-to one-cycle-previous data and new data). Logical AND and logical OR between the data are carried out to obtain AND result X and OR result Z, logical operations between the previous result In-1 and AND result X is carried out to obtain a result Y, and logical AND between the result Y and the OR result Z is carried out. A bit "A" whose AND result X is "1" is set again to "1", and a bit B whose OR result Z is "0" is set again to "0".

Abstract: A program for partitioning a centrally developed industrial control program into component that may be download to distributed devices for execution and control of an industrial process divides elements of the control program into spatially linked elements which are associated with physical devices that have defined locations and spatially independent elements that have no defined location within the control structure. The spatially linked elements are grouped together according to their proximity and the spatially independent elements are assigned to those groupings so as to minimize communications between the various links. The cost of the grouping, the band width of the signals and the capabilities of the modules are also considered.

Abstract: A system for accurately determining a slip frequency for use in controlling an induction motor. The system includes two tables for determining ideal flux and flux current levels as a function of rotor speed and uses values from those tables to determine an actual rotor inductance required for calculating the slip. The system also generates a slip multiplier which is used to increase or decrease the slip as a function of the flux current to compensate for changing rotor resistance.

Abstract: A bidirectional lateral insulated gate bipolar transistor (IGBT) includes two gate electrodes. The IGBT can conduct current in two directions. The IGBT relies on a RESURF operation to provide high voltage blocking in both directions. The IGBT is symmetrical, having N-type drift region in contact with an oxide layer. A P-type region is provided above the N-type-drift region, having a portion more heavily doped with P-type dopants. The RESURF operation can be provided by a buried oxide layer or by a P substrate or by a horizontal PN junction. The IGBT can be utilized in various power operations, including a matrix switch or a voltage source converter.

Abstract: The present invention is generally directed to a bearing assembly suitable for use in a wet or harsh chemical environment. The bearing assembly includes a bearing housing that is resistant to corrosion, oxidation, contamination and deterioration when exposed to water, bacteria and various chemicals. Specifically, the bearing housing in accordance with the present invention is made from sintered stainless steel. In one embodiment, the housing can also be impregnated with a polymeric sealant which prevents the housing from entrapping bacteria and chemicals to which it may be exposed.

Abstract: The arrangement for the control of an electromagnet is intended for an electromagnet consisting of a Stationary core 7, a pickup coil 1 through which current flows temporarily after the switch is closed, a holding coil 2 through which current flows during the operating state, as well as a moveable armature 8 moving in relation to the core 7. Within a magnetically responsive switching circuit 5, which is connected in series with the pickup coil 1, a coupling sensor 22 is included, consisting of at least one winding which is linked to at least a part of the magnetic field of the electromagnet at least then when the air gap is open. At the instant when the air gap is closed, the voltage spike induced in the sensor coil 22 switches a controllable semiconductor 11, connected in series with the pickup coil 1 into a state of high resistivity via an electronic switching circuit arrangement.

Abstract: A method of editing a real-time control program as it controls equipment is provided in which the editing occurs in a second area of memory and integrated into the pre-existing program by means of conditional jump instructions concatenated to that edited material. The pre-existing program is uninterrupted by the editing process except for a change of single instructions which do not affect the results of the execution but redirect the execution thread of that control program to be conditionally connected to the edited material. This single writing of single instructions, which do not affect execution results, precludes the possibility of the controller executing partially edited programs. The jump instructions are conditional on a test edit pointer to allow instantaneous implementation of the edits and a simple return to unedited instructions simply by changing the state of the flag.

Abstract: A process for providing a metal oxide-containing coating on a compatible substrate, the coating being transparent to a photocuring source output and upon cure being resistant to electrical stress. The process of the invention comprises a) preparing a precursor composition comprising a mixture of a stabilizer and a metal oxide sol precursor material; b) combining the stabilizer/metal oxide sol precursor material mixture with a photocurable base resin without high shear mixing to achieve a homogeneous, transparent composition; c) coating the substrate material with the transparent composition; and d) photocuring the coated substrate bearing the transparent composition, wherein the cured coating is homogenous and transparent and remains transparent in the use state, thereby rendering the coating corona resistant. This invention further relates to the coated substrate.

Abstract: The present invention constitutes a data crossloading system for use with a programmable controller system having primary and secondary (or "back-up") systems each of which have redundant hardware components and have data structures associated with these components. The present invention further relates to the interconnection of the hardware components and to the processes for providing redundant data structures which enable a secondary or back-up system to rapidly and effectively assume control when a malfunction occurs in a primary control system. Both systems are connected via the same remote data links to common I/O racks which interface to sensing and output devices on the equipment being controlled.

Abstract: A bus bar having reduced parasitic inductance and equal current path lengths. A bus bar of the present invention has a first plate connected to a collector of a first transistor, a collector of a second transistor, an emitter of a third transistor and an emitter of a fourth transistor; a second plate including a second plate input connected to a collector of the third transistor and a collector of the fourth transistor; a third plate including a third plate input connected to an emitter of the first transistor and an emitter of the second transistor; and a fourth plate which is connected to the first plate. The first plate, the second plate, and the third plate are disposed and arranged such that the lengths of the current paths from the fourth plate through the first transistor to the input of the third plate is equal to the length of the current path from the fourth plate through the second transistor to the input of the third plate.

Abstract: A fixture is provided for facilitating the fabrication of a motor controller of the type including a power substrate module and a control circuit board mounted to and electrically coupled to the power substrate module via a plurality of conductors. The fixture is preferably a ring-like structure made of epoxy-fiberglass laminate. Apertures for engaging and holding the conductors are provided in the fixture at locations corresponding to conducting pads on the power substrate module. For fabrication, the power substrate module and the fixture are preformed and solder is disposed on the conducting pads of the module. During fabrication, the conductors are inserted into the apertures in the fixture and the fixture and conductors are positioned over the preformed power substrate module to bring the conductors into contact with the conducting pads. The fixture and power substrate module are then passed through a reflow oven to melt the solder and complete the connection of the conductors to the module.

Abstract: An adaptable mounting arrangement is provided for securing a shaft to a hub of a speed reducer or other mechanical power transmission device. The hub is configured having a pair of tapered interior surfaces converging to a location approximately at the midpoint of an axial bore defined in the hub. A pair of counterbores are also defined in the interior surface of the hub at opposite axial ends thereof. One or more tapered sleeve members may be provided to engage the tapered interior surfaces defined in the hub. Alternatively, annular bushings may be provided in each of the counterbores when the hub is to be secured to a screw conveyor drive shaft or the like.

Abstract: In an industrial controller associated with independent I/O modules for exchanging signals between a controlled machine and the controller, a control program executed by the controller is associated with an I/O map identifying functionality of the independent I/O modules. At initialization of the controller, function keys are transmitted to the I/O modules, the latter which confirm that they are capable of the functions expected by the control program. The I/O modules may change their function according to the function keys and may accept functions not identical to those performed by the I/O module if the I/O module performs at greater functionality.

Abstract: A bus structure for interconnecting the modules of an industrial automation controller includes DATA lines and associated control lines that enable interface circuits on each module to transfer frames of data. Modules connected to the bus structure support data transfers of differing widths and differing speeds, and interface circuits within each module automatically adapt to data width and speed differences between communicating modules. During a first bus cycle of each transfer, sending and receiving modules negotiate a bus width and clock speed to be used for the transfer by asserting their respective width and speed codes onto a set of wired-or status lines. After the first bus cycle, the status lines are then used for communicating alternate functions between the participating modules.

Abstract: An integrated motor drive system includes a variable speed electric motor, a fan connected to the electric motor to generate an air flow as the motor rotates, and a motor drive connected to the electric motor, the drive including a heat sink disposed between the motor and the drive and having a plurality of asymmetrically spaced apart heat transfer fins transferring heat generated by power components in the drive to the air flow. The fan is connected to a one of either the rotor of the variable speed motor or to an auxiliary fan motor controlled independently of the variable speed motor. A fan shroud on one end of the motor acts as an air duct member adapted for dividing and directing the flow of air from the fan to sets of heat transfer fins on the heat sink. A method of operating the drive integrated type motor system includes generating motor speed command signals in the drive based on inputs from an operator through an operator interaface unit on the drive.

Abstract: A variable frequency motor drive incorporating a circuit interrupter includes a rectifying circuit for converting incoming AC power to DC power and an inverting circuit for converting the DC power to controlled AC power in response to control signals. A control circuit implements a preset control routine to control operation of the inverting circuit to drive a motor in accordance with desired operating parameters. A circuit interrupter is coupled between the source of AC power and the rectifying circuit and includes an actuator for interrupting power to the drive in response to interrupt command signals from the motor control circuit. The motor drive includes a switching circuit and a capacitive circuit for powering the circuit interrupter. The drive control circuitry monitors operation of the drive and the motor and when conditions require removal of power to the drive, the control circuitry commands the switching circuit to close, energizing the circuit interrupter and thereby removing power to the drive.

Abstract: The overcurrent protective switch contains a switch lock 8, which, in the switched on position, holds the movable contact pieces 3 in engagement with the fixed contact pieces 2 against the force exerted by at least one switch-off spring. The switch lock 8 comprises a switch splicing plate 10 connected to the movable contact pieces 3 in an articulated mechanism; a toggle lever splicing plate 12 connected to the switch splicing plate 10 at a toggle joint 13; and a pawl lever 15 mounted in a position inside the housing 1, which is supported by a trigger pawl 17 and connected with the toggle lever splicing plate 12 in an articulate mechanism. The joint axles 11, 13, 16 of the switch splicing plate 10 and the toggle lever splicing plate 12, as well as the pivot bearing axle 14 of the pawl lever 15 are in the on state arranged on a slightly curved line, so that a past dead center condition is created.

Abstract: A mounting for a solderable component module (SCM.TM.) interconnect module includes an elongated trench or blind via for receiving an edge of the module. The module may be a circuit board or other electrical device and preferably includes edge finger connectors. The elongated trench preferably includes hemicylinders located about the periphery. The hemicylinders provide plated through conductors for connecting to the finger connectors of the module. The trench is made according to an advantageous method in which the aperture is etched in order to remove barbs or extra copper material caused by milling the aperture. Preferably, the module fits into the trench with an interference or size-on-size fit. The trench may include strain relief areas. Additionally, the mounting can include apertures for receiving legs on the mounted board.