Abstract: A charging circuit can include: a first module having a plurality of power transistors, and being coupled between a first port and a reference ground; a second module having a plurality of power transistors, and being coupled between a second port and the reference ground; at least one inductor coupled between the first module and the second module; and where at least one of the first module and the second module forms a multi-level converter with the at least one inductor.

Abstract: There is provided a method of controlling a plurality of converter cells in a phase arm of a modular multilevel converter (MMC) in accordance with a main reference. The method includes dividing the main reference into a plurality of reference parts, and, by using a grouping of the plurality of converter cells into a plurality of groups, operating a plurality of modulators in parallel, each modulator controlling a respective one of the groups of converter cells in accordance with one of the reference parts. A phase arm controlled in accordance with such a method is also provided, as well as an MMC including at least one such phase arm, and a converter station including at least one such MMC.

Abstract: An apparatus includes first and second pluralities of switches, a controller for controlling these switches, gate-drivers for driving switches from the first plurality of switches, and first and second terminals configured for coupling to corresponding first and second external circuits at corresponding first and second voltages. During operation, the controller causes the first plurality of switches to transition between states. These transitions result in the second voltage being maintained at a value that is a multiple of the first voltage. The controller also causes the second plurality of switches to transition between states. These transitions resulting in capacitors being coupled or decoupled from the second voltage. The gate drivers derive, from the capacitors, charge for causing a voltage that enables switches from the first plurality of switches to be driven.

Abstract: A power conversion device and a control circuit are provided. The power conversion device includes a power conversion circuit and a control circuit. The control circuit includes a first controller and a second controller. The power conversion circuit includes an input capacitor, a rectifier circuit, and a power switch. The input capacitor is coupled to an input terminal of the power conversion device. The rectifier circuit converts an input AC power into a rectified power. The first controller operates the power switch to cause the power conversion circuit to convert the rectified power into an output power. The second controller detects a signal waveform at the input terminal, and controls the first controller in response to the signal waveform at the input terminal, so as to utilize the power switch to discharge the charge stored in the input capacitor.

Abstract: A method of DC-DC power conversion includes converting a DC link voltage to a DC output voltage for a load that is lower than the DC link voltage using a buck converter. The method includes controlling the buck converter in a normal switching mode in response to the DC link voltage being below a predetermined high threshold. The method also includes controlling the buck converter in a rate limited switching mode in response to the DC link voltage being at or above the predetermined high threshold.

Abstract: A brushless motor is at least partially located in a hermetically sealed space. An electric work machine includes a brushless motor, an output unit, a motor case, a lead wire, and a first seal. The brushless motor includes a stator, a rotor rotatable with respect to the stator, and a rotor shaft fixed to the rotor. The output unit is drivable by the rotor shaft. The motor case includes an internal space and a wiring passage. The internal space accommodates the stator and the rotor. The lead wire is located in the wiring passage connecting the internal space and an external space of the motor case. The first seal seals between the lead wire and the motor case.

Abstract: A soft start module includes a power component, a current sensing component, a reference voltage generating circuit, and a constant current control circuit. The power component has a first terminal connected to a first node, a second terminal connected to an Output node, and a third terminal connected to a third node. The current sensing component has a fourth terminal connected to an input node and a fifth terminal connected to the first node. The reference voltage generating circuit has a seventh terminal connected to a fourth node and an eighth terminal connected to a ground node. The constant current control circuit has a ninth terminal connected directly or indirectly to the fifth terminal of the current sensing component, a tenth terminal connected the fourth node, and an eleventh terminal connected to the third node.

Abstract: The present document relates to a power converter. The power converter may be configured to convert an input voltage at the input of the power converter into an output voltage at an output of the power converter. The power converter may comprise a pass device, a feedback circuit, and a bypass circuit. The pass device may be coupled between the input of the power converter and the output of the power converter. The feedback circuit may be configured to generate, in a voltage regulation mode, a drive signal for driving a control terminal of the pass device. The bypass circuit may be configured to apply, in a bypass mode, a predetermined voltage to the control terminal of the pass device.

Abstract: The present invention provides a controller, a switched-mode power supply and a method for controlling a switched-mode power supply. In response to a change of the switched-mode power supply from a continuous conduction mode to a discontinuous conduction mode, slope compensation is carried out with an output peak voltage raised by a compensating DC offset. Moreover, in response to a change of the switched-mode power supply from the discontinuous conduction mode to the continuous conduction mode, the compensating DC offset is subtracted from the peak voltage. In this way, an additional DC offset that would be introduced by a conventional slope compensation approach can be eliminated, maintaining a valley of a sampled feedback voltage constant both under steady load conditions and during load jumps.

Abstract: A flyback converter with improved over-voltage protection (OVP) functionality, which includes a primary winding arranged to receive an input voltage, a secondary winding coupled to the primary winding and connected to a rectifier circuit to generate DC output voltage, a primary side regulating controller, an auxiliary winding arranged to provide electric power to the primary side regulating controller, an external detection circuit connected between the auxiliary winding and the primary side regulating controller, an internal detection circuit arranged inside the primary side regulating controller and coupled to the external detection circuit by detecting the current value flowing through the external detection circuit and comparing it with a predetermined current value of the internal detection circuit to enable or disable an OVP circuit to protect the primary side regulating controller, and a switching device arranged to receive on/off signals generated for regulating current flowing through the primary win

Abstract: A switching module includes a substrate, a switching element, a first control part, a second control part, a first power part and a second power part. The switching element is disposed on the substrate. The switching element includes a first control terminal, a second control terminal, a first power terminal and a second power terminal. The first control part is connected with the first control terminal of the switching element. The second control part is connected with the second control terminal of the switching element. A projection area of the first control part on a reference plane intersects with a projection area of the second control part on the reference plane at one or more first intersections. The first power part is connected with the first power terminal of the switching element. The second power part is connected with the second power terminal of the switching element.

Abstract: A totem pole PFC (Power Factor Correction) circuit, having: a first switch, a second switch and a control circuit. When the totem pole PFC circuit works in CCM (Continuous Current Mode), the control circuit is configured to turn on a main switch when a current detecting signal indicative of an AC input current of the totem pole PFC circuit decreases to a current valley reference signal, and keep the main switch ON for a first on-time period. When the totem pole PFC circuit works in DCM (Discontinuous Current Mode), the control circuit is configured to turn on the main switch at a valley of a switching voltage after expiry of a time delay started from when the AC input current decreases to zero, and keep the main switch ON for a second on-time period.

Abstract: An inline DC feeder DC/DC voltage step-up harness for photovoltaic solar facilities includes a housing, a plurality of PV input connectors, at least one PV output connector. The housing incorporates a DC/DC converter, and has an input and an output. The plurality of PV input connectors are operatively connected to the housing at the input. The PV output connector is operatively connected to the housing at the output.

Abstract: A power converter includes: a first circuit board; a cooling body; a housing, wherein the cooling body and the housing surround the first circuit board; a heat-generating component which is arranged on a side of the first circuit board facing the cooling body and which is coupled to the cooling body in a heat-conducting manner; and further components. The cooling body, the housing and the first circuit board border a first volume, in which the heat-generating component is arranged. The cooling body, the housing and the first circuit board border a second volume, in which the further components are arranged.

Abstract: The invention relates to a stator device (2) for an electric machine (1), comprising —a stator body (3), —a plurality of cooling channels (9a-9x) that are designed to cool the stator body (3) and extend along the stator body (3) in an axial direction, and —a cooling fluid connection device (7) that delimits a connection channel (12) axially outwards and in a radial manner, said connection channel extending in the circumferential direction, wherein the axial end of each cooling channel opens into the connection channel, and the connection channel extends radially inwards further than the cooling channels (9a-9x).

Abstract: A signal output circuit including a first transistor coupled to a power supply line to receive a power supply voltage, a diode provided between the power supply line and a gate electrode of the first transistor, and a current generation circuit provided on a ground side with respect to the diode, the current generation circuit being configured to generate a current for the diode, upon turning on of the first transistor, and to increase the current, upon the power supply voltage dropping below a predetermined level.

Abstract: A fuse includes an integrated measuring function. In an embodiment, the fuse includes a fuse housing including a first receiving space delimited by a pressure body and a second receiving space spatially separated from the first receiving space. A fusible conductor is mounted in the first receiving space and a measuring device is accommodated and mounted in the second receiving space. The measuring device has a current transformer and an electronic assembly, electrically conductively connected to the current transformer. Viewed in a direction of longitudinal extent, a height of the current transformer essentially corresponds to a height of the second receiving space. With the aid of the measuring device, it is possible to determine the electric current flowing through the fuse in the immediate vicinity of the fuse. Energy required is generated from the primary current of the fuse by electromagnetic induction, meaning no external power source is required.

Abstract: A method for suppressing a narrow pulse is provided. The method is applied to a bridge switch circuit having at least one bridge arm which has an upper switch transistor and a lower switch transistor, and includes: detecting whether an original comparison value of a modulated wave in a current cycle is in a preset narrow pulse interval of the upper switch transistor, and if so, determining an adjustment interval of the upper switch transistor to which the original comparison value of the modulated wave currently pertains; and adjusting the original comparison value of the modulated wave to an adjusted comparison value of the modulated wave corresponding to the adjustment interval of the upper switch transistor to which the original comparison value of the modulated wave currently pertains according to a corresponding relationship between adjustment intervals of the upper switch transistor and adjusted comparison values of the modulated wave.

Abstract: An energy-recycling device and a DC voltage-boosting device thereof is disclosed. The DC voltage-boosting device includes a first phase controller, an interleaved voltage booster, a second phase controller, and a phase-shift voltage converter. The first phase controller generates a first PWM signal and a second PWM signal. The interleaved voltage booster receives an input DC voltage, the first PWM signal and the second PWM signal and increases the input DC voltage to a supplying DC voltage. The second phase controller receives the supplying DC voltage and a setting voltage, thereby generating third PWM signals. The phase-shift voltage converter receives the third PWM signals and the supplying DC voltage and converts the supplying DC voltage into a stable DC voltage.

Abstract: A power supply circuit includes: power supplying module configured to provide DC voltage; transformer module including primary-side first winding connected to power supplying module and secondary-side winding coupled to primary-side first winding; switch module having one end connected to primary-side first winding and the other end connected to grounding terminal; control module connected to switch module, where control module is configured to control switch module to have different switching frequencies and/or different turning-off times, to enable first pulse voltages with different duty cycles to be formed on primary-side first winding, and second pulse voltages with different duty cycles to be subsequently generated on secondary-side winding; and voltage conversion module having input terminal connected to secondary-side winding and output terminal connected to voltage output terminal of power supply circuit, where voltage conversion module is configured to convert second pulse voltages with different du