Abstract: A synchronous average harmonic current controller for a line connected bidirectional resonant power converter results in a harmonic voltage gain closely related to the commanded bridge duty cycles. A primary bridge has its duty cycle set to achieve controlled line power transfer and voltage regulation of a primary bus energy storage capacitor. A secondary bridge circuit has its duty cycle set to achieve voltage regulation of secondary bus energy storage capacitor. A first embodiment uses the independent energy storage elements to achieve power factor correction and low noise regulation using a single stage. A second embodiment uses feedforward duty cycle control to achieve isolated voltage regulation using the well-defined voltage gain resulting from the synchronous average harmonic current controller.

Abstract: An apparatus for power conversion includes a switching network that controls interconnections between pump capacitors in a capacitor network that has a terminal coupled to a current source, and a charge-management subsystem. In operation, the switching network causes the capacitor network to execute charge-pump operating cycles during each of which the capacitor network adopts different configurations in response to different configurations of the switching network. At the start of a first charge-pump operating cycle, each pump capacitor assumes a corresponding initial state. The charge-management subsystem restores each pump capacitor to the initial state by the start of a second charge-pump operating cycle that follows the first charge-pump operating cycle.

Abstract: A method includes outputting an alternating current (AC) waveform from an inverter module to a plurality of loads, outputting a fault waveform from the inverter module to a first load of the plurality of loads in response to a fault condition associated with the first load, and outputting the AC waveform from the inverter module to at least some of the plurality of loads if the fault condition is cleared before a recovery period expires or disconnecting the inverter module from the plurality of loads if the fault condition is not cleared before the recovery period expires.

Abstract: There is provided motor, including: a stator including a plurality of laminated plates; and a rotor arranged inside the stator with a gap between the rotor and the stator, wherein the stator further includes an annular yoke located outside of the stator and a plurality of teeth protruding from an inner peripheral surface of the yoke toward the rotor, wherein slots in which coils wound around the teeth are arranged are formed between the teeth that are adjacently arranged, wherein gaps to which a cooling medium is supplied are formed between bottom portions of the slots and the coils, and wherein the stator further includes end plate members arranged so as to face the laminated plates.

Abstract: A power supply comprises a controller configured to control a power converter by generating drive signals that control the opening and closing of a high side switch and a low side switch. The controller is configured to selectively control the high side switch according to various modes of operation depending on operating conditions such as input voltage and load power consumption. The modes of operation can include, for example, a mode in which the high side switch is closed and then opened once during each of the series of switching cycles and a mode of operation in which the high side switch is closed and then opened two times during each of the series of switching cycles.

Abstract: A converter for connecting a battery end and a link end, according to one embodiment of the present invention, comprises: a switch unit including at least four switches connected in series to link; an inductor for connecting a node between two of the four switches with a battery end; a capacitor unit which includes a first capacitor and a second capacitor connected in series and which are connected in parallel with the switch unit; a resistor having one end connected to a node between the first capacitor and the second capacitor; a flying capacitor connected in parallel with at least two of the four switches; a first diode connected to the other end of the resistor and one end of the flying capacitor; and a second diode connected to the other end of the resistor and the other end of the flying capacitor.

Abstract: A method of setting a synchronous rectifier on-time value includes determining that a time interval has occurred, receiving a number of triangular current mode (TCM) pulses measured during the time interval, and determining a pulse comparison value equal to a number of switching period pulses during the time interval minus the number of TCM pulses during the time interval. The method also includes increasing the synchronous rectifier on-time if the pulse comparison value is greater than or equal to a threshold and decreasing the synchronous rectifier on-time if the pulse comparison value is less than the threshold.

Abstract: Each of a power-source bus bar and a grounding bus bar provided in a driving apparatus has a terminal portion to be connected with output terminals of a power module and a bending portion bent in a direction perpendicular to a first surface of a bus bar holder; the bending portion is disposed between a smoothing capacitor and the power module; the power-source bus bar and the grounding bus bar are arranged in such a way as to face each other.

Abstract: A two-transistor forward switching cell includes two primary switching elements connected between an input voltage source and a primary winding of a transformer. The switching elements are connected to the primary winding at opposite ends of the winding. Reset diodes are connected between one of the opposite ends of the primary winding and one termination of the voltage source, and between another of the opposite ends of the primary winding and another termination of the voltage source. The transformer has at least a secondary winding connected to drains of synchronous rectifiers. One of the rectifiers is on during at least a portion of a time when the switching elements are on. The other of the rectifiers is a freewheeling rectifier, is connected to at least one controlled current source, and is off when the switching elements are on. Both rectifiers are on for a common predetermined time.

Abstract: An electronic rotary encoder is configured to be disposed on a vertical rotary shaft in a rotary object to obtain two encoded signals: a phase A signal and a phase B signal for calculating a rotational speed and a position. The electronic rotary encoder includes: at least one Hall element outputting Hall signals used as a square wave of the phase A signal; two capacitors, to respectively obtain a first voltage and a second voltage; two buffer gates, to respectively output waveform signals of a first X voltage and a second X voltage; two comparators outputting, a control signal through a latch; and an exclusive OR gate, where a direction signal and the control signal outputted through the latch are inputted to the exclusive OR gate, to obtain the phase B signal.

Abstract: The present invention provides a linear vibration motor, including a housing with a receiving space; a vibration unit arranged in the receiving space; an elastic member that suspends the vibration unit in the receiving space; and a coil assembly fixed to the housing and driving the vibration unit to vibrate. Compared with the related art, the linear vibration motor of the present invention is easy to assemble and good in vibration performance.

Abstract: A substrate electric potential stabilization circuit is configured to be connected to a bidirectional switch element including a first main electrode, a second main electrode, and a backside electrode. The stabilization circuit includes a first switch connected to the first main electrode and the backside electrode in series between the first main electrode and the backside electrode, a second switch connected to the second main electrode and the backside electrode in series between the second main electrode and the backside electrode, and a through-current prevention circuit configured to prevent the first switch and the second switch from being turned on simultaneously. The substrate electric potential stabilization circuit prevents a through-current flowing in this circuit.

Abstract: A method for determining an optimized TCC operating curve for an electronic interrupting device that protects a distribution transformer in a power distribution network, where the TCC operating curve is some optimized predetermined percentage above a TCC curve for normal transformer operation. The method includes providing a TCC transformer curve that identifies an allowed transformer operation current once the transformer magnetics have been stabilized and the transformer is operating normally, and determining a TCC operating curve that is defined by points along the transformer curve plus a predetermined percentage above the transformer curve, where the operating curve identifies a response time for when the electronic interrupting device will open in response to a certain current flow.

Abstract: A control method in use of a flyback power converter is disclosed to provide an operation power source supplying power to a power controller controlling a main power switch. The flyback power converter has a transformer with a primary winding and an auxiliary winding. The main power switch and the primary winding are connected in series. A chopper switch and a buffer inductor are connected in series between the auxiliary winding and the power controller. The power controller turns ON the main power switch for an ON time to energize the transformer, and turns ON the chopper switch for at least a time period during the ON time, so that during the time period the buffer inductor conducts an induced current flowing from the auxiliary winding and through the chopper switch, to build up the operation power source.

Abstract: A drive motor for a suction device (400) or a machine tool in the form of a hand-held power tool (200, 300) or a semi-stationary machine tool. The drive motor (20, 120) has a stator (80) with an excitation coil assembly (86) and a rotor (40, 140) with a motor shaft (30, 130) which is rotatably mounted about a rotational axis (D) on the stator or relative to the stator (80) by means of a bearing assembly (24A) and which passes through a shaft through-opening (42, 142) of a laminated core (41, 141) held on the motor shaft (30, 130). The rotor (40, 140) has a magnet assembly (50) with at least one permanent magnet such that the rotor (40, 140) can be rotated about the rotational axis (D) by energizing the excitation coil assembly (86).

Abstract: According to one embodiment, there is provided an armature winding of a rotating electrical machine, the armature winding being a 3-phase 6 or more even-number pole two-layer wound armature winding. The armature winding includes three or more parallel circuits provided in each phase, an individual coil constituting each of the circuits being connected by wave winding, each circuit being arranged so that phase belts respectively overlap phase belts of “number of poles/2” in the circuits on both adjacent sides, and the phase belts being arranged at different positions in a circumferential direction in each circuit.

Abstract: An actuator for generating vibration, including a shaft; a middle supporter having a fitting portion fitted into an upper portion of the shaft and a support portion below the fitting portion to form a first space where a lower portion of the shaft is exposed; a circuit board having a driving coil and a hollow formed through the middle supporter; a housing having an inner space that accommodates the middle supporter and the circuit board so the circuit board is fixed thereto; a first yoke plate having a first magnet installed to face an upper surface of the driving coil and coupled to an upper portion of the middle supporter; a second yoke plate having a second magnet installed to face a lower surface of the driving coil and coupled to a lower portion of the middle supporter; and a weight installed to at least one of the yoke plates.

Abstract: A power supply apparatus, comprising at least one circuit board having thereon at least a first single phase power factor controlled (PFC) circuit, and a second PFC corrected circuit, the first single phase PFC circuit and the second PFC corrected circuit each having at least one PFC device in communication with at least one inverter, at least one resonant (LC) circuit positioned on the at least one circuit board and in electrical communication with at least one of the first single phase PFC circuit and the second PFC corrected circuit, at least one transformer in communication with at least one of the first single phase PFC circuit and the second PFC corrected circuit via the at least one LC resonant circuit, the at least one transformer configured to generate at least one transformer output signal, and at least one capacitor in communication with the at least one transformer and configured to output at least one magnetron input signal in response to the at least one transformer output signal, and at least o

Abstract: In one aspect of the present invention, a motor includes a rotor that is rotatable about a center axis line and a stator that is disposed on a radial outside of the rotor. The stator includes a winding portion including a plurality of conductor connection bodies in which a plurality of conductors are connected in series and a stator core in which a plurality of slots through which the conductor connection body passes are provided. The winding portion includes a neutral point portion located on one side in the axial direction of the stator core, ends of the three conductor connection bodies being electrically connected to the neutral point portion. The neutral point portion includes two connection portions to which two of different combinations of the ends of the three conductor connection bodies are connected.

Abstract: Provided is a power conversion system that can suppress a fault in a short-circuiting switch that bypasses a fault unit and enhance the reliability and redundancy of the system. The power conversion system is provided with a plurality of power converter units that are formed by using semiconductor switch elements and are connected in series, and comprises: switch elements that are provided to input terminals and/or output terminals of the power converter units and bypass the power converter units; and overvoltage suppressing elements which are connected in parallel with the switch elements and in which conducting states are changed by an application of a prescribed voltage.