Abstract: Variable speed AC motors are selected in accordance with user defined characteristics. A reference database containing information on a selected variety of frame/modules is modified in accordance with selected input data. The complexity of selecting an appropriate sized frame/module is simplified by utilizing key information about the motor electromagnetic characteristics as well as how they will vary due to operation at some user/application-defined operating conditions. The user/application-defined operating conditions are multi-dimensional, and include cooling/enclosure variations, ambient temperature, altitude, service factor, minimum, nominal, and maximum speeds (and corresponding continuous and momentary load torques at each of these speeds). This allows a person without intimate knowledge of motor characteristics to choose an optimal combination of motor and corresponding variable voltage, variable frequency supply for a particular application.

Abstract: A system for scheduling periodic events having varying rates. The system uses a linked list type data structure and an array to schedule the plurality of events having varying rates. In a preferred embodiment of the invention, data items are scheduled for transfer during a plurality of data transfer intervals. The linked list type data structure is traversed for each data transfer interval to collect the data items requiring transfer.

Abstract: A terminal and capacitor box is provided for mounting directly onto a generally cylindrical surface of an electric induction motor housing. The terminal box includes a generally rectangular body member adapted to receive a pair of capacitors therein. The body member includes a substantially planar deck surface, a first pair of substantially rectangular opposing sidewalls, and a second pair of opposing sidewalls. The second pair of sidewalls have a curved bottom edge preselectively contoured to conform to the curved surface of the electric motor housing. In addition to the above, the terminal box includes a torsional spring member for engaging the pair of capacitors and holding the pair of capacitors in place against the planar deck surface of the rectangular body member and between the sidewalls regardless of the orientation of the terminal box. Thus facilitating the manufacturing process by rendering the box less sensitive to rough handling and more ameanable to processing as a subassembly.

Abstract: A curved low impedance laminated bus assembly includes a curved first sheet of relatively thin conductive material forming an AC bus conductor and a curved second sheet of relatively thin conductive material forming a -DC bus conductor directly connected to a -DC line side of a DC energy storage device. A curved third sheet of relatively thin conductive material forms a +DC bus conductor directly connected to a +DC line side of the DC energy storage device and is connected to the AC bus conductor through a +DC switch. A plurality of dielectric sheets are laminated between the AC bus conductor, the -DC bus conductor, and the +DC bus conductor.

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: 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: An opto-mechanical torque sensing device suitable for use with rotary machinery integrates a photoelastic polymer detector, a light source, a photoelastic image sensor and an artificial intelligence neural network and algorithm. The photoelastic polymer is formed into a hollow cylinder and bonded to metal collars located at each end of the cylinder. The collars serve to readily place the cylinder detector over a machine shaft and affix it to the shaft using a keyway, setscrew, or spring pin. Alternatively, split collars and a split sleeve can also be used to clamp the detector to the shaft. In the presence of polarized light, the photoelastic polymer detector generates an optical fringe pattern that varies as a function of torque applied to the shaft or other machine part on which the detector is mounted. The artificial intelligence neural network learns the mapping relationship between the observed optical fringe pattern and the applied torque using a training procedure.

Abstract: A magnetic top stick for use at the opening portion of a core slot of an electromagnetic device includes a group of magnetically anisotropic members arranged in a substantially non-magnetic body adapted to fit snugly within the core slot. The magnetic properties of the group of members combine to provide the top stick with an overall high magnetic permeability in the depth direction of the core slot and overall low magnetic permeabilities in the width and longitudinal directions of the core slot. A convenient method of manufacturing the top stick includes first forming magnetically anisotropic sheets by cold rolling and annealing, then laminating and heat processing the sheets with B stage materials to generate a unitary laminated structure. The unitary laminated structure is sectioned into multiple magnetic flux bars which are in turn disposed in the non-magnetic body forming the top stick.

Abstract: A substrate (10) of a semiconductor device includes a power section (12) and a control section (14). The power section includes doped regions (16, 18, 20) and terminals (22, 24, 26) which define power devices such as transistors or SCRs. The control region also includes doped areas including a parasitic collector (32). A minority carrier current (62) flows from the doped regions of the power section to the collector of the control section when the power device to substrate junction is forward-biased. A moat assembly (40) includes a first doped region (42) between the doped regions of the power and control sections. An electrical connection (46) connects the moat first doped region (42) with a moat second doped region (44). The self-biased moat assembly is isolated from ground such that it is self-biased negative in accordance with internal operating conditions of the semiconductor device. The minority charge carriers are collected by the moat first doped region.