Abstract: A novel circuit scheme and control includes a plurality of identical DC-DC converters with an optimal modulation/harmonic controller and a load balancing portion or process in an integral and systematic design methodology. The modulation/harmonic controller can be configured to control the individual modules in an optimal and coordinated way in the time domain so as to substantially reduce or eliminate a large amount of high-frequency input current harmonics, thus reducing EMI, weight, and size and increasing redundancy. The load balancing portion or process can balance the loads on the converters in real time or offline.

Abstract: A power supply device includes a power supply unit that wirelessly supplies power, a communication unit that communicates with an electronic device, and a control unit that controls the communication unit to transmit a predetermined data to the electronic device based on whether or not the electronic device is connected to an external device supplying power to the electronic device.

Abstract: A method and system for managing electrical loads on a standby generator. The method includes utilizing a transfer switch control to selectively shed loads each associated with one of a series of priority circuits. Priority values are initially assigned to each of the electric loads based upon the initial hard-wired connection of the electric loads to a main breaker panel during set up. The control unit of a transfer switch allows the user to reassign priority values to each of the electric loads based upon a user preference. The control unit includes one or more predefined priority assignment programs that can be selected to modify the priority values assigned to the electric loads.

Abstract: A computing device including a mounting component at a panel of the computing device to couple with a docking stand for a removable battery of the computing device to electrically couple and receive power from the docking stand and the removable battery supplies power to the computing device if the computing device decouples from the docking stand.

Abstract: Systems and methods are provided to control a multimode uninterruptible power supply (UPS) using external information relevant to the stability of the power source. In one example, a UPS system may include at least one inverter feed path and at least one bypass feed path. A controller may command the inverter feed path and the bypass feed path based at least in part on information relevant to the stability of the power source that supplies the first inverter feed path or the first bypass feed path, or both. This information relevant to the stability of the power source may derive from at least one information provider external to the UPS system.

Abstract: Systems and methods for controlling uninterruptible power supplies (UPSs) are provided. In one example, a system may include an inverter feed path to supply a first amount of power to a load and a bypass feed path to supply a second amount of power to the load. A controller may generate command the inverter feed path and the bypass feed path to vary the first amount of power and the second amount of power based at least in part on an occurrence of a power supply disturbance and a type or severity, or both, of the power supply disturbance.

Abstract: Systems, methods, and devices for controlling parallel uninterruptible power supplies (UPSs) are provided. One example of a parallel UPS system may include several UPS modules to supply power to a load and at least one controller. At least some of the UPS modules may include a bypass feed path that can be switched on or off via a static switch module (SSM). The controller may adaptively control which of the bypass feed paths are switched on and off based on the load and respective capacity ratings of the UPS modules. The controller may also determine when an SSM of one of the bypass feed paths is likely to have failed.

Abstract: In a three-level power converting apparatus, a U-phase control means of a first control means operates with a control power supply. A control power supply voltage decrease detecting means and a second control means operate with a gate-driving power supply. A U-phase control means conducts PWM operation using a modulation signal ? from a modulation signal generating means and a carrier signal from a carrier signal generating means and generates control signals for a plurality of switching elements. The second control means generates gate signals from the control signals. When the control power supply voltage decrease detecting means delivers a control power supply voltage decrease signal, the second control means generates the gate signals to turn ones of the switching elements OFF and turn others of the switching elements ON for a predetermined period of time.

Abstract: An intrinsically safe supply for supplying back-up power during a power-out event incorporates one or more rechargeable fuel cells. The power supply is provided with switching circuitry operable to provide an output back-up current from the fuel cells upon a power-out event. The fuel cells are housed within a sealed metal housing immersed within an electricity insulating potting material chosen to arrest spark formation and/or electrically insulate any created sparks. The fuel cells comprise sealed lithium iron based fuel cells for supplying back-up electrical current. A charging circuit electrically connects the fuel cells with an external power source for providing a charging current during normal power-on conditions.

Abstract: In accordance with the present disclosure, a system and method for providing a battery back-up unit (BBU) for a rack-level power infrastructure is described. The system may include a chassis sized to fit within a commodity power supply unit (PSU) slot in a power distribution unit (PDU). A battery may be disposed within the chassis, and at lease one power module coupled to the battery. The system may also include a power module controller coupled to the at least one power module, and a form-factor connector coupled to the power module controller and the at least one power module.

Abstract: A power harvesting system including multiple parallel-connected photovoltaic strings, each photovoltaic string includes a series-connection of photovoltaic panels. Multiple voltage-compensation circuits may be connected in series respectively with the photovoltaic strings. The voltage-compensation circuits may be configured to provide respective compensation voltages to the photovoltaic strings to maximize power harvested from the photovoltaic strings. The voltage-compensation circuits may be include respective inputs which may be connected to a source of power and respective outputs which may be connected in series with the photovoltaic strings.

Abstract: A HVDC power grid including a multiplicity of voltage sourced converters arranged in a symmetrical monopole transmission configuration to transmit DC power over a DC power grid of transmission lines connected between the voltage sourced converters, and circuitry implemented for sensing and identifying a fault occurred on a section of a DC transmission line. In response to the sensing, the current on the faulted DC transmission line is controllably drawn down to a target current level, e.g., 50 amp, which will accommodate clearing of the faulted transmission line section by allowing switches located at each end of the faulted transmission line section to be able to open against such level of current without triggering an non-extinguishable or sustained arc across one of the switches. At least one of the switches is capable of opening when the current is reduced to the drawn down level to isolate the transmission line.

Abstract: A power distribution grid comprising a plurality of cells configured to be electrically connected to each other and a power management system. A cell in the plurality of cells is configured to distribute electrical energy to an area corresponding to the cell. The cell has a plurality of entry nodes configured to allow the electrical energy to flow into the cell. The power management system is configured to manage a distribution of the electrical energy to the area by the cell independently of the distribution of the electrical energy to other areas by other cells in the plurality of cells.

Abstract: To provide a power supply system equipped with a storage battery assembly including a plurality of storage battery control units, the power supply system being configured such that a group of the storage battery control units, which are selected from the storage battery control units, and which have output voltages within a predetermined voltage range, are first connected to the parallel connection line, and such that the voltage range is set so as to maximize the number of the storage battery control units having output voltages within the voltage range.

Abstract: A system of solar roof shingles and underlayment with wireless power transfer between the solar roof shingles and the underlayment is disclosed. Each roof shingle has a solar collector array coupled to a wireless resonator. The solar collector array establishes a voltage in response to exposure to sunlight and the wireless resonator converts the voltage to a transmittable electromagnetic signal. The signal is transmitted to resonant devices embedded in the underlayment beneath the shingles The resonant devices may be resonant capture devices that convert the received electromagnetic signal back to a usable voltage, or they may be wireless repeaters that retransmit the electromagnetic signal to remote resonant capture devices, which then convert it to a voltage. This voltage is placed on an electrical grid and made available at a remote location for use, storage, or placement on the public electrical grid.

Abstract: A power transfer system is provided. The power transfer system includes a field-focusing element including a dielectric material. The dielectric material includes a ceramic material and a polymer material. The ceramic material includes an oxide compound comprising titanium and the polymer material includes a resin.

Abstract: A wireless power transfer foreign object detector having at least one foreign object detector providing at least one foreign object detection signal, and at least one primary transmitter coil providing at least one primary transmitter signal, the primary transmitter coil responsive to the at least one foreign object detection signal.

Abstract: A surface communication device includes: a sheet-shaped electromagnetic wave propagation unit that propagates electromagnetic waves; and a power supplying device unit or a power receiving device that is disposed above the electromagnetic wave propagation unit in a non-conductive state with the electromagnetic wave propagation unit, and includes an electromagnetic wave coupling unit that transmits electromagnetic waves to the electromagnetic wave propagation unit or receives electromagnetic waves from the electromagnetic wave propagation unit. The electromagnetic wave coupling unit includes a mesh-shaped conductive coupling element that is disposed facing the electromagnetic wave propagation unit.

Abstract: A wireless inductive power transfer system comprises a power transmitter for transmitting power inductively to a power receiver via transmitter coil 11 to receiver coil 21. In the system, a communication method comprises a step 37 of transmitting, by the power receiver, first data and second data to the power transmitter, the first data indicating a modulation requirement, and the second data indicating an inquiry message; a step 32 for receiving, by the power transmitter, the first data and the second data from the power receiver, a step 34 for transmitting, by the power transmitter, a response message for responding to said inquiry message, by modulating a power signal according to said modulation requirement so as to carry the response message; and a step 35 for receiving the response message by the power receiver by demodulating the modulated power signal carrying the response message received via the receiver coil from the power transmitter.

Abstract: Disclosed is an energy storage system provided with a wired and wireless energy transfer function. The energy storage system includes: an energy input unit to which energy generated from a plurality of energy sources is input; an energy input control unit for selecting one energy source from among the plurality of energy sources, and transferring energy of the selected energy source through operation in a wired operation mode or a wireless operation mode; a wireless energy transmitting/receiving unit for wirelessly transmitting/receiving the energy of the selected energy source during the operation in the wireless operation mode of the energy input control unit; an energy storage/control unit for storing the energy of the selected energy source; an energy output unit for consuming the energy stored in the energy storage/control unit; and an energy output control unit for distributing the energy stored in the energy storage/control unit to the energy output unit.

Abstract: A power converting apparatus and a photovoltaic module are discussed. The power converting apparatus includes a converter including a tapped inductor and a first switch, the converter converting a level of an input direct current (DC) voltage and outputting the level-converted DC voltage, and an inverter including a plurality of switches, the inverter converting the level-converted DC voltage into an alternating current (AC) voltage. The inverter operates separately in a first switching mode where the inverter performs a switching operation at a first frequency for a first period of the converted AC voltage and a second switching mode where the inverter performs a switching operation at a second frequency for a second period of the converted AC voltage, the second frequency being lower than the first frequency.

Abstract: An electric power control section includes: a temperature detecting section for detecting temperatures of a battery; and an accumulation counter for accumulating numerical values assigned to the respective temperatures of the battery which have been detected by the temperature detecting section. The electric power control section reduces electric power supply to an LCD display section when an accumulated value obtained by the accumulation counter exceeds a preset value.

Abstract: An automation system is provided. The automation system includes a rail assembly comprising a first stop block at a first end and a second stop block at a second end. The automation system further includes a magnet assembly mounted on the rail assembly between the first and second stop blocks and a slide assembly configured to move back and forth over the rail assembly between the first block and the second block. The automation system further includes a linear motor coupled to the slide assembly and magnetically coupled to the rail assembly, the linear motor configured to generate a magnetic field that interacts with the magnetic assembly to provide a linear force that moves the slide assembly on the rail assembly.

Abstract: The invention relates to an electromagnetic actuator for a surgical or medical instrument, the actuator having a stator (19) and a displaceable element (10), which at least partially comprises a paramagnetic or ferromagnetic material and can be displaced from a first position into a second position by applying an electromagnetic field. The invention is characterized in that the displaceable element (10) is or will be held in the first or in the second position by a permanent magnet.

Abstract: A vibration generator includes a vibrator, a holder, and a plurality of coils. The vibrator includes a magnet and has a plate shape parallel to a horizontal surface. The holder is attached to a chassis and holds the vibrator such that the vibrator can be displaced with respect to the vibrator. The plurality of coils generate a magnetic field for changing at least one of a position and a posture of the vibrator with respect to the chassis. Each of the plurality of coils is a thin coil, and is arranged face to face with the vibrator. The vibrator can move at least according to magnetization of the coils, while deforming a portion of the holder.

Abstract: An actuator includes a fixed section that includes a spindle and a coil fixed to the spindle, a first movable section that includes a first magnet magnetized in an inside-outside direction and disposed to cover the outer peripheral surface of one end in an axial direction of the fixed section, that is mounted on the spindle in an elastically-maintained state, and that is movable in the axial direction, and a second movable section that includes a second magnet magnetized in the inside-outside direction and disposed to cover the outer peripheral surface of the other end in the axial direction of the fixed section, that is mounted on the spindle in an elastically-maintained state, and that is movable in the axial direction. When current flows in the coil, the first movable section and the second movable section move in the opposite directions.

Abstract: An insulated electric motor includes a stator core having a stator cavity. Also included is an adhering material disposed within at least one portion of the stator cavity. Further included is a filling substance disposed within the at least one portion of the stator cavity and adhered to the adhering material, wherein the adhering material and the filling substance substantially fill the stator cavity.

Abstract: In a double drive shaft motor, a stator and a field rotor are arranged at a radially outer side of a magnetic modulation rotor. The stator and the field rotor are arranged in series in an axial direction of the motor. This structure increases an amount of a winding coil of the stator and magnets in the field rotor, and an output torque of the motor. When a field magnetic flux passes through soft magnetic material members in the magnetic modulation rotor, because the generation and the reception of the magnetic flux can occur at a radially same side of the magnetic modulation rotor, this structure cancels an eddy current generated in the soft magnetic members and supporting members made of non-magnetic metal which tightly support the soft magnetic member. This structure provides a reduced axial size of the motor with high performance.

Abstract: An electric rotating machine includes a stator having a plurality of stator teeth facing a rotor. The rotor has a plurality of pairs of permanent magnets. Permanent magnets of each pair are located in a “V” shape configuration and form a magnetic pole. Every other tooth of the plurality of stator teeth is a long stator teeth and an adjacent tooth is a short stator teeth. Adjusting recesses formed in the rotor are at symmetrical, about a d-axis of each magnetic pole, locations in a way that each of the adjusting recesses has a width made equal to a width of one of the stator teeth and their deepest levels are equidistant from a d-axis of the magnetic pole in one and the opposite circumferential directions angularly about the axis of the rotor by 56° in electrical degrees.

Abstract: A motor includes a rotor supported for rotation about a longitudinal axis, a stator including a magnetic core, a first end plate positioned at a first end of the magnetic core, and a second end plate positioned at a second end of the magnetic core. The magnetic core, first end plate, and second end plate cooperate to define a central opening. The motor also includes a plurality of rods each fixedly attached to the first end plate and the second end plate and including a first end that extends along the longitudinal axis beyond the first end plate and a second end that extends along the longitudinal axis beyond the second end plate. A first support disk is coupled to the first end of each of the rods and a second support disk is coupled to the second end of each of the rods.

Abstract: An electric motor has a stator and a coil which is arranged within the stator housing and whose winding can be energized via a connection line system. A cooling plate is arranged outside the interior of the stator, and on the outer side of said cooling plate a carrier plate for motor electronics is arranged, to which carrier plate the connection line system is connected. The connection line system is led from the inside to the outside through a recess in the cooling plate and is electrically connected to the carrier plate.

Abstract: A system for cooling an electrical machine is disclosed. The electrical machine includes a rotor, a stator, and at least one cooling pathway extending through the stator. During operation of the electrical machine, fluid flows through the pathway and carries away heat generated by the electrical machine.

Abstract: A brushless motor is provided that is capable of suppressing water from contacting a magnetism detection sensor. A brushless motor includes a rotor section that includes a rotor magnet; a stator section that generates a rotational magnetic field with respect to the rotor magnet; a magnetism guide member that guides a portion of magnetism from the rotor magnet; a control unit that includes a circuit substrate and a circuit chamber which is sealed and houses the circuit substrate; and a magnetism detection sensor that is mounted on the circuit substrate inside the circuit chamber and that detects magnetism guided by the magnetism guide member.

Abstract: In one embodiment, a flywheel power generating facility includes a flywheel power generator including a flywheel for storing rotational energy, and configured to convert the rotational energy into electric power to supply the electric power to a test facility. The generating facility further includes a driving motor configured to rotate the flywheel, and a power supply device configured to supply electric power to the driving motor. The generating facility further includes a detector configured to output a signal related to the rotation of the flywheel, and a controller configured to control operation of the driving motor, based on the outputted signal. The controller controls the operation of the driving motor so that the driving motor provides accelerating torque to the flywheel while the supply of the electric power to the test facility is stopped and while the electric power is supplied to the test facility.

Abstract: A brush holder is placed between a yoke housing and a gear housing and includes a holder member and a base member. The holder member is installed to an opening of the yoke housing and holds a plurality of brushes. The base member is installed to the holder member and includes a connector configured to connect with an external connector to receive an electric power. An output side end part of the yoke housing has a flange portion, through which the gear housing is fixed to the yoke housing. The holder member includes a contact portion that contacts an opening end portion of the yoke housing in an axial direction of a rotatable shaft. The contact portion is axially spaced from the base member by an axial gap.

Abstract: A bearing support plate for use in a generator has a radially enlarged flange with a first cylindrical portion extending from the flange in one direction which will provide a bearing support for an outer race of a ball bearing, and a radially inner cylindrical portion extending in an opposed direction that will be away from the ball bearing relative to the flange. The flange is generally cylindrical but has a truncated portion over a circumferential extent. The first cylindrical portion is formed with radially enlarged portions with intermediate radially thinner portions. The flange includes bolt holes circumferentially aligned with the radially thinner portions.

Abstract: There is provided a bearing assembly including: a sleeve supporting a shaft via oil; a sleeve supporting a shaft via oil; a sleeve housing surrounding the sleeve to prevent leakage of the oil; and at least one circulation part formed such that upper and lower surfaces of at least one of the sleeve and the sleeve housing are in communication with each other, wherein at least one of an outer peripheral surface of the sleeve and an inner peripheral surface of the sleeve housing has a maximum radius of curvature at a portion adjacent to the circulation part.

Abstract: There is provided a spindle motor capable of reducing generation of negative pressure. The spindle motor includes: a sleeve fixedly installed on a base member; a shaft rotatably supported by the sleeve; a rotor hub fixedly installed on an upper end portion of the shaft to rotate together therewith; and a thrust plate fixedly coupled to the sleeve so as to be disposed to face a lower surface of the rotor hub and having a ring shape, wherein the thrust plate includes a channel part formed therein in order to reduce a difference in pressure between a bearing clearance on an inner side thereof and a bearing clearance on an outer side thereof.

Abstract: A motor with power-generating coil set including a base, a rotor, a driving circuit and a power-storing unit is disclosed. The base has a shaft coupling portion and a supporting surface, wherein the supporting surface surrounds the shaft coupling portion, and a driving coil set and a power-generating coil set are disposed above the supporting surface. The rotor has a carrier, a shaft and a magnetic member, wherein the carrier has a coupling surface, the shaft rotatably couples with the shaft coupling portion of the base, and the magnetic member is mounted on the coupling surface and has a magnetic face facing the driving coil set and the power-generating coil set. The driving circuit electrically connects with and sends a driving signal to the driving coil set. The power-storing unit electrically connects with and stores electric power generated by the power-generating coil set.

Abstract: Disclosed herein is a spindle motor in which the center of a main magnet configuring a rotor is positioned at a position higher than that of the center of a core configuring an armature, such that magnetic force generated in the main magnet acts downwardly, thereby easily preventing the floating of the rotor.

Abstract: A direct-current motor includes a yoke having six magnetic poles, an iron core having nine teeth, first and second coils wound about each tooth in directions different from each other, a commutator for being rotated integrally with the iron core and having eighteen commutator pieces, and three pairs of brushes. The brush having the positive pole electrically connected to the first coil is different from the brush having the positive pole electrically connected to the second coil, the brush having the negative pole electrically connected to the first coil is different from the brush having the negative pole electrically connected to the second coil, or the brush having the positive pole and the brush having the negative pole that are electrically connected to the first coil are respectively different from the brush having the positive pole and the brush having the negative pole that are electrically connected to the second coil.

Abstract: An insulated stator coil (16) is provided comprising a plurality of coil strands (18) having a top surface (24) and a bottom surface (26). A filler material (30) is disposed on the top surface (24) and the bottom surface (26) of the plurality of coil strands (18) to smooth discontinuities at the top and bottom surfaces (24, 26). A conductive cap (32, 34) disposed over each of the top and bottom surfaces (24, 26) of the plurality of coil strands (18). A conductive strip (46) is disposed between the filler material (30) and each respective conductive cap (32, 34). The conductive strip (46) is effective to lower a resistivity of the conductive caps (32, 34) such that partial discharges do not occur in the insulated stator coil (16).

Abstract: A DC electric motor has a stack of laminations defining a rotor with at least two pairs of poles and an even number of slots at least equal to 8. The rotor also has a commutator with an even number of segments and a closed distributed rotor winding. The winding extends in the slots and is connected in a predetermined manner to the segments of the commutator. The rotor winding has a winding section of the lap type, connected to two consecutive segments of the commutator and, in series with this, a plurality of winding sections of the wave type. These winding sections all span an identical number of slots.

Abstract: A rotary electric machine including a core having a plurality of slots disposed in a distributed manner in a circumferential direction of a cylindrical core reference surface, the slots each having a slot opening portion that opens in an opening direction toward one side in a radial direction of the core reference surface, and a coil conductor wire wound around the core. The coil conductor wire has a deformable cross-sectional shape, a diameter of the coil conductor wire with a circular cross-sectional shape is larger than a slot opening width which is a width of the slot opening portion in the circumferential direction, and the coil conductor wire is flexible enough to be flattened so as to be equal to or less than the slot opening width.

Abstract: Stator of an electrical machine are already known, having a stator lamination stack, having coil forms fastened thereto which each include an electrical coil. The coil forms are each pressed onto a tooth of the stator lamination stack, convex protuberances, which generate the dynamic compression, being provided on the teeth of the stator lamination stack. The inherent drawback here, however, is that the convex protuberances are expensive to manufacture. In the case of the stator according to the present invention, the fastening of the coil forms to the teeth of the stator lamination stack is simplified. It is provided in accordance with the present invention that at least one fastening element (9) be provided at the two end faces of the stator lamination stack (2) that includes a fastening means (10) which cooperate in a form-locking manner and/or force-locking with coil forms (6).

Abstract: An insulator of an armature includes an upper resin member and a lower resin member. Each of the upper and lower resin members includes decreased thickness portions. Axial positions of the decreased thickness portions of the upper and lower resin members are arranged to overlap at least partially with each other. Each of the upper and lower resin members further includes a rib arranged to project from a corresponding one of the decreased thickness portions. The rib improves the strength of the corresponding decreased thickness portion and reduces the likelihood that any of the decreased thickness portions of the upper and lower resin members will be damaged when the two members are fitted to each other.

Abstract: An electrical machine (100) comprises a housing (110), a stator (200) arranged in the housing and a conical spring washer (300), which holds the stator (200) in its installed position by means of a predetermined axial spring force (FA). In this case, the conical spring washer (300) comprises an annular base body (310), which is attached to a housing inner wall (110) by means of an attachment device (330), as well as a number of spring structures (320) which extend from the annular base body (310) in the direction of the stator (200) and support the stator (200) axially.

Abstract: In a spinning processing method of processing cylindrical parts includes: joining at least two sheets of metal plates by bring together sheet surfaces of the metal plates; rotating the metal plates using a rotating shaft that is arranged perpendicular to the sheet surfaces of the metal plates; applying a separating and deforming force at a coupling position on a periphery of the at least two sheets of the metal plates to separate and deform the metal plates while the at least two sheets of the metal plates rotate; and applying a cylinder forming force to at least one of the metal plates to form a cylinder along the rotating shaft.

Abstract: An ultrasonic motor includes a vibrator configured to generate an elliptical vibration, a driven member configured to be driven by the vibrator, wherein the driven member is driven according to the elliptical vibration of the vibrator, a holding unit configured to hold the vibrator, and a pressure unit configured to press the vibrator against the driven member, wherein the holding unit includes a first holding member configured to hold the vibrator, and a second holding member configured to press the vibrator against the driven member, and wherein the first holding member and the second holding member are relatively movable in a direction perpendicular to a contact surface of the driven member with the vibrator.

Abstract: A piezoelectric actuator includes a fixed body, a movable body arranged to face the fixed body, and a plurality of piezoelectric elements arranged between the fixed body and the movable body and operating in a shearing mode. Each piezoelectric element having one end fixed to the fixed body and another end contacting the movable body, wherein a direction of polarization of each of the plurality of piezoelectric elements is different from each other.