Abstract: The present invention provides an Energy Management System which can be configured to automatically switch peripheral appliances on or off by detecting master appliances being in standby state, even though these appliances are located far away from each other in a premise, or even in other premises. The system is also capable of detecting whether the included appliances are plugged or unplugged to facilitate simple and efficient management of appliance power consumption for the sake of energy saving. In one embodiment, it also provides a detachable, battery-powered wireless sub-system, supporting dual operation modes, to improve wireless coverage of the system.

Abstract: A virtual parallel load bank system is characterized by a load band connected in parallel with the source terminals of a voltage source to create a specific current to be applied to the terminals. The load bank includes a plurality of loads that are selectively connected in accordance with the desired current for the voltage source. One load device is designated as a master load and a communication network is connected with the load devices to enable the master load device to communicate with the other load devices to determine which are available for connection in the virtual load bank system.

Abstract: A method of balancing a demand for electricity is disclosed. Consumers of the electricity are organized into a hierarchical set of nodes. A demand for a node at a first level of the hierarchy is defined.

Abstract: An electric storage system includes at least two types of electric storage cells. A first electric storage unit is configured from a first electric storage cell, and a second electric storage unit is configured from a second electric storage cell. The first and second electric storage units are electrically connected to each other through a current controlling circuit.

Abstract: A peak-cut control device is provided with a storage battery having a power generation device and a storage battery for charging/discharging a part of power generated by the power generation device. The peak-cut control device includes a difference power calculating section that calculates differential power between a planned power generation amount in the power generation device determined based on a temporary peak cut amount and a demand prediction power amount that predicts a power demand for each predetermined time, and also includes a peak-cut amount calculating section that compares the calculated differential power with chargeable power or dischargeable power per unit time of the storage battery every predetermined time and simulating charge/discharge of the difference power to/from the storage battery and an increase/decrease in the temporary peak-cut amount.

Abstract: The current signature of an electronic function is masked by controlling a current source that supplies power for the electronic function is controlled in a dynamically-varying manner. Excess current is detected and compared to a threshold. If the detected excess current meets the threshold, the operation of the electronic function is modified, for example by controlling a clock.

Abstract: A power system for data center, which comprises: a critical electrical equipment, an alternating current (AC) transformer, an AC power distribution unit (PDU), a rectifier transformer, and a DC PDU. The critical electrical equipment is disposed in the data center. The AC transformer is utilized to receive a first high AC electrical power from a first power utility and transform it to a low AC electrical power, and the AC PDU receives the low AC electrical power and applies the low AC electrical power to the critical electrical equipment of the data center. Further, the rectifier transformer is utilized to receive a second high AC electrical power from a second power utility and transform and rectify it to a low direct current (DC) electrical power, and a DC PDU receives the low DC electrical power and applies the low DC electrical power to the critical electrical equipment.

Abstract: A low voltage LED bulb having a base that fits a standard light socket designed to receive a bulb operated at line voltage is installed in a conventional lamp, which is connected by a lamp cord to a rechargeable battery, the charge in which is maintained by a charging circuit. The rechargeable battery can be provided in a module equipped with a receptacle capable of receiving a standard plug designed for line voltage, and in this case, the lamp requires no modification other than the replacement of the standard bulb by the low voltage LED bulb. In another embodiment, the battery and charger are incorporated into the lamp.

Abstract: In an electric power system with a distributed power source, a fluctuation of its system voltage is brought about by an amount of power generation of the distributed power source that depends on weather. Stabilization of the system voltage is realized by generating a driving signal of a switch that the system has from weather forecast information and power system information and switching a configuration of the system.

Abstract: A power converter circuit includes a synchronization circuit that is configured to generate at least one synchronization signal. A series circuit includes a number of converter units configured to output an output current. At least one of the converter units includes a transformer and is configured to generate an output current such that a frequency or a phase of the generated output current is dependent on the synchronization signal.

Abstract: Some embodiments of the invention provide a method for balancing the power output to each phase of a set of micro-inverters. The method of some embodiments is performed by a gateway, which receives output messages from a plurality of micro-inverters. The gateway identifies the phase of each micro-inverter and calculates the output of the plurality of micro-inverters to each power line of a multi-phase system. The gateway then sends control signals to the micro-inverters to control the output of each micro-inverter to maintain a balanced aggregate power output to each phase of the power grid.

Abstract: A power transmission device performs contactless power transmission from a power transmitter to a power receiver. The power transmitter includes a main body supporting the power receiver by first and second surfaces that are disposed adjacent to each other, a power transmitting coil disposed within the main body and having a first coil portion corresponding to the first surface and a second coil portion corresponding to the second surface, and a power source supplying power to the power transmitting coil. The power receiver includes a main body having a third surface and a fourth surface opposed to the first and second surfaces, respectively, and a power receiving coil disposed within the main body and having a third coil portion corresponding to the third surface and a fourth coil portion corresponding to the fourth surface.

Abstract: Methods and systems for maximum efficiency achievable in near-field coupled wireless power transfer systems are disclosed and may include configuring coil geometry, independently of load impedance and source impedance, for a transmit (Tx) coil and a receive (Rx) coil based on a media expected to be between the coils during operation. A desired susceptance and conductance may be determined and an impedance of an amplifier for the Tx coil may be configured based on the determined susceptance and conductance. A load impedance for the Rx coil may be configured based on the determined susceptance and conductance. A matching network may be coupled to the amplifier. The Rx coil may be integrated on a complementary metal-oxide semiconductor (CMOS) chip. One or more matching networks may be integrated on the CMOS chip for the configuring of the load impedance for the Rx coil.

Abstract: A wireless power transmission apparatus includes: first coils receiving electric power from an AC power supply for transmitting the electric power to a power reception apparatus; and a controller selecting, from the first coils, a coil to be used for transmission of electric power to the power reception apparatus, based on a position of the power reception apparatus. The first coils are each configured to be switchable between a first state in which electric power can be transmitted to the power reception apparatus and a second state in which efficiency in transmission of electric power to the power reception apparatus is lower than the first state.

Abstract: A transparent capacitive powering system (200) is disclosed.

Abstract: Methods, apparatuses and systems for reducing or selectively terminating the power supplied to or the voltage present at the ports of electronic devices are disclosed. Methods, apparatuses and systems for reducing or terminating the power supplied to and, thus, the voltage across electrical contacts of one or more ports of a portable electronic device when the port is not in use may be effected in a variety of ways and may prevent corrosion or other moisture-induced damage to each port, and to the electronic device of which the port is a part.

Abstract: The disclosure relates to a safety device for a photovoltaic system for feeding into a power supply system, that includes at least one input for connection to a PV generator, at least one output for connection to an inverter, and a switching element for de-energizing the at least one output. The safety device includes an evaluating unit configured to switch the switching element based on a low-frequency signal at the at least one output. The disclosure also relates to a method for operating such a safety device.

Abstract: An electrical apparatus is provided which can reduce, when it is shipped in a state in which a secondary battery is built therein, power consumption before a user starts to use the electrical apparatus first. The electrical apparatus includes a secondary battery, a load which operates by power supplied from the secondary battery, and a switch element disposed between the secondary battery and the load. The switch element remains in an off state until a user starts use of the electrical apparatus.

Abstract: The present disclosure provides apparatus, systems, and methods for preventing out-of-synchronism closing between power systems. An intelligent electronic device (IED) apparatus may include a control component and a delay component. The control component is configured to selectively control opening and closing of a breaker. The control component selectively outputs a close signal to cause the breaker to connect a first portion of a power delivery system to another portion of the power delivery system. The delay component is configured to delay output of the close signal to the breaker. The delay component includes circuitry independent from control by the control component and the delay component is inconfigurable from a remote location.

Abstract: An electro-mechanical energy harvesting switch configured to provide at least two different control signals comprises: a generator activating member (9) configured to move between a rest position and a maximum loaded position; at least one spring (11, 13) configured to force the generator activating member towards the rest position; and a unidirectionally rotating protrusion member (17) comprising at least one protrusion (21) configured to move through a protrusion's path during rotation of the protrusion member (17), through a first position of the protrusion (21), in which first position the protrusion (21) is engaged with the generator activating member (9) in the rest position, and through a second position, the protrusion (21) thereby carrying the generator activating member (9) from the rest position to the maximum loaded position against the force of the at least one spring (11, 13).

Abstract: A wireless power reception device may comprise a resonance coil configured to receive power from outside of the wireless power reception device in a magnetic resonance type; a load coil inductively coupled to the resonance coil to receive the power from the resonance coil in an electromagnetic induction type; and/or a load configured to receive the power from the load coil. The load coil may be short-circuited and/or the load coil and the load may not be connected to each other during a first interval. The load coil may not be short-circuited and/or the load coil and the load may be connected to each other during a second interval that is different from the first interval.

Abstract: A DC/DC converter including a control unit configured to control a voltage variation mechanism, the voltage variation mechanism including a plurality of variable voltage regulator circuits each controlled by a switching signal. The variable voltage regulator circuits are grouped together in plural modules each controlled by a control signal sent by the control unit and the switching signals of the variable voltage regulator circuits of a same module are phase shifted in relation to each other, and the control signals of the modules are also phase shifted in relation to each other.

Abstract: Briefly, the invention involves a system and method for generating electrical power. The system includes an electromagnet positioned with one pole directed toward a like pole of a permanent magnet. The permanent magnet is preferably mounted for oscillating movement toward the pole of the electromagnet. A control system for the electromagnet is provided to supply direct current (DC) power in the form of square wave pulses which coincide with the position of the permanent magnet. Power is collected upon the collapse of the magnetic field within the electromagnetic magnet. In some embodiments the present device is supplied in the form of a reciprocating engine which provides rotary motion in addition to the electrical power generated.

Abstract: The present invention is a high efficiency permanent magnet machine capable of maintaining high power density. The machine is operable over a wide range of power output. The improved efficiency is due in part to copper wires with a current density lower than traditional designs and larger permanent magnets coupled with a large air gap. In a certain embodiment wide stator teeth are used to provide additional improved efficiency through significantly reducing magnetic saturation resulting in lower current. The machine also has a much smaller torque angle than that in traditional design at rated load and thus has a higher overload handling capability and improved efficiency. In addition, when the machine is used as a motor, an adaptive phase lag compensation scheme helps the sensorless field oriented control (FOC) scheme to perform more accurately.

Abstract: A fully enclosed fan motor assembly includes a motor housing. A stator is located radially inward from the motor housing. A rotor is located radially inward from the stator, and the gap in between the rotor and stator defines a rotor stator gap. A shaft is located radially inward from the rotor. A fin portion extending radially outward from the shaft is used to dissipate heat from the rotor to air drawn through the rotor stator gap and over the fin portion.

Abstract: An electric motor, in particular a radiator fan motor of a motor vehicle, has a stator which is fitted with a rotating-field winding, and a rotor which is mounted such that it can rotate in relation to the stator. A converter electronics system is provided, wherein a number of contact elements for insulation-free or enamel-insulated connection contacts of at least one component of the converter electronics system and/or for enamel-insulated winding ends of the rotating-field winding are mounted on a printed circuit board. The contact elements are in the form of clamping contacts or insulation-displacement terminal contacts.

Abstract: The present invention is disclosed a generator having variable power generation in which a plurality of rotors are inserted into one rotating shaft, a central connecting shaft of one rotor is detachably provided to one end of a connecting shaft of another rotor, magnets respectively arranged on ends of the two connecting shafts adjacent to each other are arranged to allow surfaces thereof having the same polarity to oppose each other, thereby spacing the two rotors apart from each other through a repelling force between the magnets, and when an external pressure greater than or equal to the repelling force between the two magnets is applied in the shaft direction, the connecting shafts of the two rotors are coupled to each other to transmit a rotational force to both of the two rotors, thereby generating power and successively increasing the power generation in accordance with the external environment.

Abstract: A rotor gear mounting assembly for a generator includes a rotor shaft comprising a first end and a second end. Also included is a magnetic member arrangement operatively coupled to the rotor shaft proximate at least one of the first end and the second end. Further included is a hub portion of the magnetic member arrangement. Yet further included is a rotor gear operatively coupled to the hub portion.

Abstract: A geared motor has a rotor, a stator which surrounds the rotor, and a gear mechanism with gear wheels. According to the described system, the gear wheels of the gear mechanism are arranged at least partially within the rotor. The geared motor may be provided with a switched reluctance motor as the electric drive, such that it can be used in an optimum manner for driving electric vehicles.

Abstract: Electric motor systems and methods may provide highly efficient operation. The electric motor systems and methods discussed herein provide an oil filled motor that is low speed and utilizes permanent magnets. The electric motor may utilize a large number of poles and fractional slot design. Further, in some embodiments, the electric motor systems and methods may be suitable for use downhole.

Abstract: Provided is a BLDC motor for a hair dryer, which includes a sintered bearing to guide rotation of a shaft, instead of using a typical ball bearing. Thus, a rotation shaft is held by fluid dynamic pressure generated by rotation of the BLDC motor, thereby decreasing vibration and noise.

Abstract: The present disclosure describes a mechanical backup bearing system arrangement to work in conjunction with non-contact magnetic bearings and capable of coping with thermal expansions of the bearing components during operations. Expansions or contractions of an inner or outer race of a bearing can be compensated using particular springs providing a low profile and a proper stiffness. An electric machine system includes a rotational portion and a stationary portion. The electric machine further includes a magnetic bearing configured to support the rotational portion to rotate within the stationary portion. A mechanical back-up bearing resides in a cavity between the rotational portion and the stationary portion. A flat spring is carried by the stationary portion and abutting the back-up bearing.

Abstract: An electric motor, in particular a radiator fan motor of a motor vehicle, has a rotor which is mounted such that it can rotate in relation to a stator, a motor mount which has an electronics compartment for accommodating a converter electronics system, and an electronics compartment cover. The electronics compartment cover has a peripheral sealing groove into which a peripheral edge of the electronics compartment engages by way of a corresponding sealing web in order to reliably seal off the electronics compartment.

Abstract: A multi-channel wound-field synchronous machine and method of assembling a multi-channel axial-flux wound-field synchronous machine are described. The machine includes an even number of stators and a plurality of field-excitation windings, each of the plurality of field-excitation windings being associated with a respective one of the stators. The machine also includes an exciter to feed all of the plurality of field-excitation windings.

Abstract: Disclosed is a motor rotor, comprising an iron core (10) and permanent magnets (20) provided inside the iron core (10). The iron core (10) is provided with sets of mounting grooves (30) on the iron core (10) in the peripheral direction of the iron core, each set of mounting grooves (30) comprising two or more mounting grooves (30) provided intermittently in the radial direction of the iron core (10). There are sets of permanent magnets (20), the individual permanent magnets (20) of each set of permanent magnets (20) correspondingly being embedded into the individual mounting grooves (30) of each set of mounting grooves; there is an island region (12) between the outermost layer of mounting grooves (30) and the periphery of the iron core (10), and an enhancing hole (13) is provided in the island region (12), an enhancing rod (60) being provided in the enhancing hole (13).

Abstract: Disclosed therein is a rotor for a motor. The rotor includes: a rotor core including an annular ring having a shaft hole formed at a central portion thereof, a plurality of yokes formed around the annular ring, and magnet insertion holes formed between the neighboring yokes; magnets respectively inserted into the magnet insertion holes; and a pair of rotor covers each having a ring plate, which has a shaft insertion hole formed at a central portion thereof, and a plurality of stoppers protrudingly formed around the ring plate. A pair of the rotor covers are joined to an upper portion and a lower portion of the rotor core in such a fashion that the stoppers are respectively located at side portions of the magnet insertion holes.

Abstract: A motor includes a stator having a ring type structure and including a plurality of teeth protruding toward an inner surface of the stator and coils wound around the teeth; and a rotor including a core with a plurality of permanent magnets circumferentially magnetized inside the stator around a rotation shaft and a non-magnetic member between the core and the rotation shaft, and the permanent magnet includes a protrusion protruding to the non-magnetic member. An area of the permanent magnet is increased by increasing a length of the permanent magnet so that a magnetic flux can be increased to increase a torque.

Abstract: A coil wire for a rotating electric machine includes: an element wire assembly formed by bundling a plurality of element wires, the plurality of element wires being coated so as to be insulated from each other; and a coating member having conductivity, the coating member coating a periphery of the element wire assembly, the coating member being positioned in a slot of a stator of the rotating electric machine and being obliquely wound with respect to a longitudinal direction of the coil wire, and the coating member being formed with a plurality of conductive belts electrically insulated from each other.

Abstract: The invention relates to a magnetic rotor core for an electric rotary machine, including a stack of magnetic laminations having some poles provided with pole tips, said core including a stack that comprises laminations of which at least one of the poles has at least one at least partially truncated pole tip, preferably a single pole tip.

Abstract: The present invention relates to an electric machine (1) that includes a stator (10) and a rotor (20), with the said stator (10) being equipped with at least one annular exciter unit (11) that includes a coil (12) and at least two annular yokes (13a, 13b), with the said rotor being equipped with a structure (21) and at least one annular receiver unit (22). Each receiver unit (22) includes at least two rows (24) of magnets (23). Two sides (131, 132) of each yoke (13) include teeth (14) distributed angularly in a regular manner, and the said teeth (14) of the two adjacent yokes (13) fit onto a face (121) of the said exciter unit (11), alternately forming north poles and south poles.

Abstract: The present invention relates to an electric machine (1) consisting of a stator (10) that is provided with at least one exciter unit (11) consisting of a coil (12), at least two annular yokes (13a,13b) and at least one row of intermediate pieces (15), and a rotor (20) having a structure (21) and at least one receiver unit (22) consisting of at least two series (25) of at least two rows (24) of magnets (23). Two sides (131,132) of each yoke (13) consist of the first teeth (14), fitting with the said intermediate pieces (15) on a face (121) of the said exciter unit (11) and alternatingly forming the second north poles and the second south poles. Each series (23) is positioned opposite one face (121), forming an air gap (30) with the said exciter unit (11), with the electric machine (1) thus including at least two air gaps (30), with a flux F thus circulating inside the said electric machine (1), dividing and regrouping itself in the vicinity of the said magnets (23) and of the said yokes (13).

Abstract: The invention provides apparatus and methods for heating and cooling ferroelectric materials during a conversion between thermal and electrical energy. One method comprises the use of a fluid that performs repeated heating and cooling cycles, e.g., ‘thermal cycling’, of ferroelectric materials during the evaporation and condensation of a phase changing fluid. The systems, devices, and methods eliminate the need for external inputs such electrical or mechanical power, thereby improving the overall efficiency of the energy conversion. One apparatus comprises liquid-retaining wicks that helps fluid distribution and expands the range of operational environment for the energy system. Ultimately, the uniformity and speed of various embodiments of the thermal cycler apparatus and method provide improvements in conversion efficiency and reductions in parasitic loss over current thermal cyclers.

Abstract: An EAP generator is described, including at least one EAP stack that is disposed between two force-transferring surfaces disposed parallel to one another, having at least one layer, facilitating relative displacement between the end of the EAP stack and the force-transferring surface facing toward that end, in particular a deformable or friction-reducing intermediate layer. A corresponding method for generating electrical energy from elongation energy on a capacitive basis by charge displacement is also described.

Abstract: A MEMS switch has fixed support, a plate-shaped flexible beam having at least one end immovably supported by the fixed support and having an extending movable surface, a movable electric contact disposed on the movable surface of the flexible beam, a fixed electric contact facing the movable electric contact and disposed at a fixed position relative to the fixed support, first piezoelectric driver disposed above the movable surface of the flexible beam, extending from a portion above the fixed support towards the movable electric contact, and capable of displacing the movable electric contact towards the fixed electric contact by voltage driving, and second piezoelectric driver disposed at least on the movable surface of the flexible beam and capable of so driving a movable part of the flexible beam by voltage driving that the movable electric contact is separated from the fixed electric contact.

Abstract: An acoustic wave device and an electronic component are disclosed. The acoustic wave device includes a substrate, excitation electrodes on the substrate and a cover. The cover comprises a frame member on the substrate, and a lid member. The frame member surrounds the excitation electrodes and includes an inner wall, top surface and an outer wall. The lid member is disposed on the top surface, and includes first and second surfaces opposite to each other, and a descending part on the second surface. The second surface faces the substrate. The descending part extends downward from the second surface, and covers at least a part of the inner wall or at least a part of the outer wall. The electronic component includes the acoustic wave device on a mounting substrate via an electrically conductive bonding member, and molding resin covering the device.

Abstract: A plasma poling device includes a holding electrode (4) which is disposed in a poling chamber (1) and holds a substrate to be poled (2), an opposite electrode (7) which is disposed in the poling chamber and disposed facing the substrate to be poled held on the holding electrode, a power source (6) electrically connected to one electrode of the holding electrode and the opposite electrode, a gas supply mechanism supplying a plasma forming gas into a space between the opposite electrode and the holding electrode, and a control unit controlling the power source and the gas supply mechanism. The control unit controls the power source and the gas supply mechanism so as to form a plasma at a position facing the substrate to be poled and to apply a poling treatment to the substrate to be poled.

Abstract: In a method of manufacturing a piezoelectric device, among a +C plane on a +Z axis side of a piezoelectric thin film and a ?C plane on a ?Z axis side of the piezoelectric thin film, the ?C plane on the ?Z axis side of the piezoelectric thin film is etched. Thus, ?Z planes of the piezoelectric thin film on which epitaxial growth is possible are exposed. Ti is epitaxially grown on the ?Z planes of the piezoelectric thin film in the ?Z axis direction such that the crystal growth plane thereof is parallel to the ?Z planes of the piezoelectric thin film. Al is then epitaxially grown on the surface of the Ti electrode in the ?Z axis direction such that the crystal growth plane thereof is parallel to the ?Z planes of the piezoelectric thin film.

Abstract: An electrically conductive contact layer (4) is provided with a joining material (9) during a method for producing a piezoelectric component (1), in particular a piezoelectric sensor (1). To this end, the electrically conductive contact layer (4) can be dipped into a paste that serves to form the joining material (9). The contact layer (4) provided with the joining material (9) is subsequently disposed between a first piezoceramic layer (2) and a second piezoceramic layer (3). The contact layer (4) is then inserted via the joining material (9) between the first piezoceramic layer (2) and the second piezoceramic layer (3), wherein a pressure is applied to the first piezocermaic layer (2) against the second piezoceramic layer (3).

Abstract: A piezoelectric component (1), which serves in particular as a piezoelectric sensor or a piezoelectric actuator, comprises a main body (2). The main body (2) has a first ceramic layer (15), a second ceramic layer (16) and an inner electrode layer (17). An outer metallization (5) is provided here, applied to an outer side (3) of the main body (2) and contacting the inner electrode layer (17). The main body (2) has a removal of material (4), the removal of material (4) separating the outer metallization (5) from an end-face outer electrode (7), which is formed by a metallization (7) of an end face (6) of the main body (2). A method for producing a piezoelectric component (1) is also provided.

Abstract: A piezoelectric component (1), which serves particularly as a piezoelectric sensor or piezoelectric actuator, comprises a basic body (6) which has a first ceramic layer (7), a second ceramic layer (8) and an internal electrode layer (9). In this case, the internal electrode layer (9) is provided at least partially between the first ceramic layer (7) and the second ceramic layer (8). The basic body (6) has a bore (10) which is provided at least partially in the region of the internal electrode layers (9). Furthermore, an electrical contact element (13) is inserted at least partially into the bore (10) of the basic body (6) and is connected electrically at least indirectly to the internal electrode layer (9) in the bore (10).