Abstract: This disclosure provides a consolidated electric motor stator lamination for multiple enclosure types such that a single stator assembly can be used for different classifications of an electric motor. Each layer of the stator lamination includes external features that, when combined with the external features of the other layers in the lamination, can be adapted to conform the electric motor to one of a plurality of enclosure types. The external features include retaining features for one or more covers, fins, and a profile configured to accept cooling tubes. In various embodiments, a single consolidated stator lamination assembly can be adapted to provide a motor having at least two of an open-drip proof (ODP), a totally enclosed fan cooled (TEFC), or a totally enclosed water cooled (TEWC) enclosure classification.

Abstract: A fuel cell system includes a fuel cell generator, a rechargeable energy storage circuit, an auxiliary load, a converter circuit, and a switch circuit. The fuel cell generator is operable to generate electrical power in a stack output signal. The auxiliary load is powered by the rechargeable energy storage circuit while in a first mode, and powered by a local signal while in a second mode. The converter circuit is operable to convert the stack output signal into a plurality of recharge signals while in the first mode and in the second mode, and convert the stack output signal into the local signal while in the second mode. The switch circuit is operable switch the plurality of recharge signals to one or more electric vehicles, and switch the local signal to the auxiliary load while in the second mode.

Abstract: An electric machine includes a stator and a rotor. The rotor includes stacked laminations forming a rotor core. The rotor rotates relative to the stator about a central axis. The rotor core has an outer diameter. Each lamination includes a plurality of magnet slots. Each magnet slot includes a ferrite permanent magnet located therein, adjacent pairs of the ferrite permanent magnets defining a number of poles. Each of the laminations includes a plurality of non-circular rotor bar apertures spaced about the central axis of the rotor and disposed adjacent to and radially inward of the rotor outer diameter. A non-cylindrical rotor bar is disposed in each respective of the plurality of rotor bar apertures. The rotor bars are formed of a conductive material, wherein at least some of the plurality of rotor bars collectively form a rotor bar cage.

Abstract: The disclosed embodiments describe a tapped winding stator for use in an electric motor. In some embodiments, the electric motor includes a stator body. In some embodiments, a plurality of teeth that are adjacent in a circumferential direction. In some embodiments, a plurality of slots are formed between the plurality of teeth. In some embodiments, a plurality of coils are mounted in each of the plurality of slots. In some embodiments, the plurality of coils are tapped in a configuration that allows the stator to selectively bypass one or more of the plurality of coils in operation. A plurality of switches are electrically coupled between the configuration and a respective phase supply to the electric motor, each of the switches having at least a first position and a second position.

Abstract: The disclosed embodiments describe a partially caged rotor for use in an interior permanent magnet motor and techniques for fabricating thereof. In some embodiments, a caged rotor includes: a rotor core having a shaft; a rotor cage comprising a plurality of conductor bars; and a plurality of permanent magnets at least partially disposed inside a plurality of mounting holes of the core, the plurality of permanent magnets and the plurality of mounting holes forming a plurality of cavities inside the core; wherein each conductor bar is disposed at a respective cavity of the plurality of cavities such that the plurality of conductor bars is of a number greater or equal to 8 and less or equal to 64.

Abstract: This disclosure provides a consolidated electric motor stator lamination for multiple enclosure types such that a single stator assembly can be used for different classifications of an electric motor. Each layer of the stator lamination includes external features that, when combined with the external features of the other layers in the lamination, can be adapted to conform the electric motor to one of a plurality of enclosure types. The external features include retaining features for one or more covers, fins, and a profile configured to accept cooling tubes. In various embodiments, a single consolidated stator lamination assembly can be adapted to provide a motor having at least two of an open-drip proof (ODP), a totally enclosed fan cooled (TEFC), or a totally enclosed water cooled (TEWC) enclosure classification.

Abstract: An electric machine includes a stator defining a rotor chamber. A rotor is disposed within the chamber and is configured to rotate about a central axis. The rotor includes a plurality of stacked laminations to form a rotor core. The rotor core has an outer diameter and each of the laminations includes a plurality of magnet slots that are radially spaced apart from the outer diameter and angled inwardly with one end of each magnet slot adjacent to the outer diameter. Each magnet slot has a permanent magnet disposed therein, adjacent pairs of the ferrite permanent magnets defining poles for the rotor. Each magnet slot has two opposite ends that define inner and outer magnet free areas. The outer magnet free areas are adjacent the rotor outer diameter and the inner magnet free areas are radially inwardly positioned. Each outer magnet free area is provided with conductive material.

Abstract: An electric machine includes a stator and a rotor. The rotor includes stacked laminations forming a rotor core. The rotor rotates relative to the stator about a central axis. The rotor core has an outer diameter. Each lamination includes a plurality of magnet slots. Each magnet slot includes a ferrite permanent magnet located therein, adjacent pairs of the ferrite permanent magnets defining a number of poles. Each of the laminations includes a plurality of non-circular rotor bar apertures spaced about the central axis of the rotor and disposed adjacent to and radially inward of the rotor outer diameter. A non-cylindrical rotor bar is disposed in each respective of the plurality of rotor bar apertures. The rotor bars are formed of a conductive material, wherein at least some of the plurality of rotor bars collectively form a rotor bar cage.

Abstract: A rotor assembly includes a rotor member and a plurality of permanent magnets. The rotor member has a hub with a central axis and a plurality of spokes extending radially outward relative to the hub. Each spoke has a radially inward end and a radially outward end. Each spoke also has a body section, a mounting section, and a flux barrier section. The body section extends from the radially outward end towards the radially inward end. The mounting section is interconnected to the hub. The flux barrier section is disposed between the body section and the mounting section and has at least one flux restriction web extending between the body section and the mounting section. The flux restriction web magnetically isolates the body section from the mounting section. A permanent magnet is disposed within each magnet-receiving slot between pairs of adjacent spokes. A motor with the rotor assembly is also disclosed.

Abstract: Disclosed herein are nucleic acid-based data storage systems and nucleic acid data storage constructs comprising reusable nucleic acid sequences, each representing information carried by a single bit (and, in some embodiments, one or more adjacent bits) within a bit string, and each furthermore representing the position of the single bit within the bit string. Also described are methods for storing data in the nucleic acid-based data storage systems and nucleic acid data storage constructs of the disclosure.

Abstract: Disclosed herein are nucleic acid-based data storage systems and nucleic acid data storage constructs comprising reusable nucleic acid sequences, each representing information carried by a single bit (and, in some embodiments, one or more adjacent bits) within a bit string, and each furthermore representing the position of the single bit within the bit string. Also described are methods for storing data in the nucleic acid-based data storage systems and nucleic acid data storage constructs of the disclosure.

Abstract: Disclosed herein are nucleic acid-based data storage systems and nucleic acid data storage constructs comprising reusable nucleic acid sequences, each representing information carried by a single bit (and, in some embodiments, one or more adjacent bits) within a bit string, and each furthermore representing the position of the single bit within the bit string. Also described are methods for storing data in the nucleic acid-based data storage systems and nucleic acid data storage constructs of the disclosure.

Abstract: A rotor assembly includes a rotor member and a plurality of permanent magnets. The rotor member has a hub with a central axis and a plurality of spokes extending radially outward relative to the hub. Each spoke has a radially inward end and a radially outward end. Each spoke also has a body section, a mounting section, and a flux barrier section. The body section extends from the radially outward end towards the radially inward end. The mounting section is interconnected to the hub. The flux barrier section is disposed between the body section and the mounting section and has at least one flux restriction web extending between the body section and the mounting section. The flux restriction web magnetically isolates the body section from the mounting section. A permanent magnet is disposed within each magnet-receiving slot between pairs of adjacent spokes. A motor with the rotor assembly is also disclosed.

Abstract: Disclosed herein are nucleic acid-based data storage systems and nucleic acid data storage constructs comprising reusable nucleic acid sequences, each representing information carried by a single bit (and, in some embodiments, one or more adjacent bits) within a bit string, and each furthermore representing the position of the single bit within the bit string. Also described are methods for storing data in the nucleic acid-based data storage systems and nucleic acid data storage constructs of the disclosure.

Abstract: This disclosure provides methods of manufacturing a controlled pore glass, including: (a) adding an acidic solution to a column containing borosilicate glass; (b) flushing the column from step (a) with an aqueous solution until the pH of the effluent is greater than about 6; (c) adding a basic solution to the column from step (b); and (d) flushing the column from step (c) with an aqueous solution until the pH of the effluent is less than about 9 to produce a controlled pore glass.

Abstract: A method includes: (1) providing a rotor for a line start interior permanent magnet motor wherein the rotor has rotor bars slots extending axially along a length of the rotor configured to receive rotor bar material, and magnet slots extending axially along a length of the rotor configured to receive magnetic material; (2) disposing rotor bar material in the rotor bar slots; (3) arranging a first end member on an axial end of the rotor; (4) disposing magnetic material in the magnet slots; (5) magnetizing the magnetic material; and (6) arranging a second end member on the rotor opposite the first end member. The step of arranging the second end member on the rotor occurs after magnetizing the magnetic material.

Abstract: In one aspect, a duty cycle controller includes a first port configured to receive a voltage bias signal, a second port configured to receive an input voltage signal, a third port configured to provide an output signal of the duty cycle controller having a duty cycle and a n-bit digital-to-analog converter (DAC) configured to receive the voltage bias signal and to provide a DAC output signal to a comparator. The DAC output signal has a peak value. The duty cycle controller also includes the comparator configured to compare the DAC output signal from the n-bit DAC with the input voltage signal to provide a comparator output signal. The comparator output signal is used to provide the output signal of the duty cycle controller and the duty cycle changes with changes to the input voltage signal.

Abstract: A driver circuit for driving a switch includes a high output impedance driver circuit portion having a high impedance output node coupled to the control terminal of the transistor and a low output impedance driver circuit portion having a low impedance output node also coupled to the control terminal of the transistor. The slew rate of the control signal is established by at least one of the high impedance driver circuit portion and the low impedance driver circuit portion.

Abstract: A driver circuit for driving a switch includes a high output impedance driver circuit portion having a high impedance output node coupled to the control terminal of the transistor and a low output impedance driver circuit portion having a low impedance output node also coupled to the control terminal of the transistor. The slew rate of the control signal is established by at least one of the high impedance driver circuit portion and the low impedance driver circuit portion.