Abstract: The present invention provides a circuitry including a regulator and a control circuit is disclosed. The regulator is configured to receive an input signal to generate an output voltage. The control circuit is configured to select one of a first reference voltage and a second reference voltage to serve as an output reference voltage according to an output signal of the regulator, and generate a control signal according to the output reference voltage to control a voltage level of the output voltage of the regulator.

Abstract: It is provided a novel LLC resonant converter with high reliability and the operation method thereof. The LLC resonant converter proposed in the present invention includes an original converter including a primary side circuit on which two half-bridge cells are connected in parallel and a secondary side circuit on which two half-bridge cells are connected in series and a redundant converter having the same configuration with the original converter, and connected with the original converter at a midpoint of a secondary winding.

Abstract: The present disclosure relates to semiconductor structures and, more particularly, to a LDO regulator circuit and methods of manufacture. The structure includes a comparator connected to a first transistor of a low drop-out (LDO) circuit; a second transistor connected to the first transistor; and a feedback loop connected to the first transistor and an output of the LDO circuit.

Abstract: An electric-power conversion apparatus includes a driving circuit that performs switching control of semiconductor switching devices, a short-circuit control means that performs short-circuit control of an electric-power conversion circuit, an excessive-current detection means that detects whether or not an abnormality caused by an excessive current exists in the semiconductor switching device, and a gate-drive-abnormality detection means that detects whether or not an abnormality exists in a gate voltage of the semiconductor switching device; based on a result of the abnormality detection by the excessive-current detection means and a result of the abnormality detection by the gate-drive-abnormality detection means, the short-circuit control means turns on all the semiconductor switching devices in any one of the upper arm and the lower arm so as to perform the short-circuit control.

Abstract: A bidirectional PFC system includes a high-frequency branch with a first transistor connected between an IO node and a high-frequency tap, and a second transistor connected between the high-frequency tap and a reference node, and a low-frequency branch with a first thyristor connected between the IO node and a low-frequency tap, and a second thyristor connected between the low-frequency tap and the reference node. An inductor is connected between the first node and the high-frequency tap. A first capacitor is connected between the first node and the low-frequency tap. The first node and the low-frequency tap are coupled to input terminals. A control circuit generates first and second gate drive signals for the transistors so as to modify an AC signal at the input terminals such that the AC current falls below a holding current of the second thyristor prior to zero crossing of the AC voltage.

Abstract: Provided is a control circuit configured to control a switching element of a switching power source, the control circuit comprising: a first protection unit configured to stop a principal current flowing through the switching element when the principal current of the switching element has exceeded a first threshold value; and a second protection unit configured to stop the principal current of the switching element over a longer time period than the first protection unit when the principal current has exceeded a second threshold value larger than the first threshold value. The first protection unit may shorten a pulse width of a control pulse in one cycle of an oscillation signal, and the second protection unit may fix the switching element to the off-state over a plurality of cycles of the oscillation signal.

Abstract: A power conversion device according to one embodiment has an inverter that converts direct-current power supplied from a direct-current power source to alternating-current power, a determination unit that determines whether or not a negative-phase sequence voltage on an alternating-current side of the inverter is a predetermined value or greater, and a stop control unit that performs control to stop the inverter in a case where the determination unit determines that the negative-phase sequence voltage is the predetermined value or greater. Further, the stop control unit may perform control to stop the inverter in a case where a positive-phase sequence voltage on the alternating-current side of the inverter is within a predetermined range.

Abstract: A microgrid connector controller (MGC) for transferring power between a power grid and a microgrid via an AC link. The MCG includes a pair of bidirectional AC/DC converters coupled to a common DC link and each having an AC line. One converter closer to the microgrid is configured to regulate frequency of AC voltage of its AC line to a predetermined frequency. The AC link includes the AC lines coupled in series with a terminal the microgrid, and a current divider coupled to a terminal of the power grid. The current divider is configured to set the first converter's current level lower than the second converter's current level.

Abstract: An over current protection circuit and an over current protection method thereof are provided. The over current protection method includes: generating a reference current curve; detecting an operation current of an electronic device; calculating a first average slope of the reference current curve and a second average slope of a variation curve of the operation current; and determining whether to activate an over current protection mechanism by comparing the first average slope and the second average slope during an over current detection mechanism.

Abstract: An electric machine for driving a motor vehicle, having a stator and a rotor, rotatably mounted relative to the stator. The stator or the rotor is equipped with a winding receptacle region having a plurality of radially extending longitudinal slots distributed in a circumferential direction. Each longitudinal slot has with an opening toward one radial side, the width of which opening is delimited by two ends of two tabs directed toward each other in the circumferential direction, wherein each longitudinal slot has, between a chamber region receiving a plurality of conductors and the two tabs, at least one shoulder reducing a width of the chamber region, the conductors being supported in a radial direction on the at least one shoulder.

Abstract: A switching converter controller includes: a stopband controller having a stopband controller input and a stopband controller output, the stopband controller is configured to provide stopband information at the stopband controller output responsive to a reference signal; a pulse-frequency modulation (PFM) controller having a first PFM controller input, a second PFM controller input and a PFM controller output, the first PFM controller input configured to receive a feedback error signal, the second PFM controller input coupled to the stopband controller output, and the PFM controller configured to selectively adjust a clock signal at the PFM controller output based on the feedback error signal and the stopband information; and a driver circuit having a driver circuit input coupled to the PFM controller output and configured to receive the clock signal, and having a driver circuit output adapted to be coupled to a power stage switch.

Abstract: A method is configured for operating a converter (10) which is implemented as a modular-multilevel converter and comprises a control arrangement (38) and a number M of phase-legs (21 to 29). The method comprises detecting whether the converter (10) has to be set into one mode of a group comprising a static synchronous compensator mode or a grid unbalance mode, generating mode control signals (MCS) depending on the detected mode, generating balance voltage reference signals (ubal,ref) depending on a first side frequency (?g), a second side frequency (?m), second side current reference signals (im,ref) and the mode control signals (MCS), generating a phase-leg control signal (uref), generating cell control signals (51 to S4) and providing the cell control signals (51 to S4) to semiconductor switches (41 to 44) of cells (31) of the phase-legs (21 to 29).

Abstract: A phase and an amplitude improving method includes performing a model establishing step, a phase compensating step, an amplitude compensating step and a compensation information generating step. The model establishing step includes establishing an inverter model. A voltage command is inputted to the inverter model to generate an actual voltage information. The voltage command includes a phase command information and an amplitude command information. The phase compensating step includes computing the phase command information and the actual voltage information to generate a compensating phase information. The amplitude compensating step includes computing the amplitude command information and the actual voltage information to generate a compensating amplitude information. The compensation information generating step includes generating a compensating voltage command. The compensating voltage command is inputted to the inverter model to generate a compensating actual voltage information.

Abstract: A feedback control circuit is described herein, comprising: an operational amplifier (op-amp) integrated circuit, wherein a first output of the op-amp provides a feedback error control signal; at least two transistors provided in a feedback path between the first output of the op-amp and an inverting input to the op-amp; and a plurality of discrete electrical components in the feedback path, such that in response to either an increase or decrease of an inverting input voltage at the inverting input that exceeds a predetermined level, at least one of the at least two transistors is turned on, and the feedback control circuit provides the feedback error control signal with an increased slew rate.

Abstract: A power converter can include a half bridge comprising a high side auxiliary switch and a low side main switch, the half bridge having an input coupled to a DC voltage source, a series resonant circuit coupled to the output of the half bridge, the series resonant circuit comprising a resonant capacitor and a primary winding of a transformer, an output coupled to a secondary winding of the transformer by a rectifier, the output delivering a regulated output voltage to a load, and control circuitry that operates the main switch and the auxiliary switch substantially complementarily as a forward converter with zero voltage switching of the main and auxiliary switches to regulate the output voltage delivered to the load.

Abstract: A digital power converter arrangement of an electric vehicle includes a CPU circuit and a function selection circuit. The CPU circuit is configured to execute and perform analog and digital conversion, pulse-width modulation and communication, including a CPU outputting one or more PWM signals by changing a time ratio of a turn-on/turn-off of square wave pulse width modulation signals. The function selection circuit includes a function selector switch configured to switch between an external battery charging function mode, an AC power supply output function mode, and an external motor driver function mode, and a motor selector switch configured to function a motor hall mode when the function selector switch is switched to the external motor driver function mode, wherein the CPU detects the function selector switch and motor selector switch to switch states to run corresponding functions.

Abstract: An insulated power supply apparatus includes, a transformer; a switching element connected in series with a primary side winding of the transformer; an active clamp circuit connected between terminals of the primary side winding of the transformer; and a power supply control semiconductor device. The switching element includes a field effect transistor and a current-voltage conversion element is connected between a source terminal of the switching element and a grounding point. The power supply control semiconductor device includes the following, a first external terminal in which voltage according to a drain side of the switching element is input, a second external terminal in which voltage converted by the current-voltage conversion element is input, an on/off control circuit that performs turn-on and turn-off of the switching element, and a ZVS determining circuit that determines whether zero voltage switching control is performed.

Abstract: A modular multilevel power converter includes: a capacitor voltage adjuster that calculates an active current component command to make an average voltage of capacitors match a command value; an active power detector that receives an AC current signal and an AC voltage signal and calculates an active power; an active power adjuster that calculates a DC current command value to make the active power match a command value; a first active power command suppressor that suppresses an absolute value of an active power command value; and a second active power command suppressor that adjusts an absolute value of an active power command value.

Abstract: A multi-phase armature winding is made up of winding segments. Each of the winding segments includes a pair of straight sections extending straight in an axial direction of the armature winding and connecting sections which are located on axially opposed end sides of the armature winding. The connecting sections are bent and connect the straight sections together in a circumferential direction of the armature winding. The winding segment is produced by winding a conductor wire member a plurality of times. The conductor wire member is made of a bundle of wires. Each of the straight sections occupies the whole of a coil side and portions of coil ends of the winding segment. Each of the straight sections has holding portions arranged at least in coil end portions thereof. The holding portions work to tighten the wires together.

Abstract: A power conversion device includes an AC current sensor, an AC voltage sensor, a DC voltage sensor, and a control circuit. The control circuit includes an integration unit configured to integrate a difference between a predetermined overcurrent threshold and the output current detected by the AC current sensor and output an integration output, a multiplication unit configured to multiply the integration output outputted from the integration unit by the output voltage detected by the AC voltage sensor and output a multiplication output, a division unit configured to calculate and output a Duty ratio by dividing the multiplication output outputted from the multiplication unit by the DC voltage detected by the DC voltage sensor, and a voltage control unit configured to control the AC voltage according to the Duty ratio outputted from the division unit.