Abstract: An inverter casing and a connection structure of an inverter and a junction box are provided. The inverter casing includes an upper casing with an inner side that is provided with a cavity for accommodating a circuit board, and an upper surface that is provided with a junction recess for accommodating a junction box that is fixedly installed in the junction recess. Moreover, a bottom part of the junction recess is provided with an elastic protrusion for connecting a high-voltage protection device, and two incoming terminals. The elastic protrusion cooperates with a knockout pin on the junction box for high-voltage power-off protection, and the two incoming terminals are connected with external cables via the junction box.

Abstract: The upper arm drive circuit for controlling drive of the upper arm switching element of the power conversion device includes: a capacitor disposed between a gate of the upper switching element and the output terminal of the power conversion device; a reverse current prevention circuit that is disposed between a power supply of the power conversion device and the capacitor, and that makes a current flow from a first terminal side of the reverse current prevention circuit connected to the power supply side to a second terminal side of the reverse current prevention circuit connected to the capacitor side and prevents a reverse current from flowing from the second terminal side to the first terminal side; and a switching element for capacitor charging that is turned ON in synchronization with a command signal that turns the upper arm switching element ON.

Abstract: An electronic circuit has an output node that outputs a DC signal indicating a temporal change rate of a voltage of a measurement target node, a first capacitor and a first resistor that are connected in series between the measurement target node and a first reference voltage node, a second capacitor that is connected between the output node and a second reference voltage node, a first switch that switches whether or not to short-circuit the first reference voltage node and the output node, and a rectifier circuit that flows a current to a connection node between the first capacitor and the first resistor from the output node, and cuts off a current to the output node from the connection node.

Abstract: A power electronics converter includes a carrier substrate, and a converter commutation cell including a power circuit. The power circuit includes at least one power semiconductor switching element. Each power semiconductor switching element is comprised in a power semiconductor prepackage. One or more terminals of each power semiconductor switching element are connected to at least one conductive layer of the carrier substrate at an electrical connection side of the respective power semiconductor prepackage. The electrical connection side is spaced apart from the carrier substrate by a gap. At least a portion of the gap is filled with an electrically insulating material with voids. A peak rated power output of the power electronics converter is greater than 25 kW, and a converter parameter, which is defined as a product of a dielectric strength of the electrically insulating material and a maximum void size, is less than or equal to 10,000 V.

Abstract: Each of a plurality of unit converters includes: a main circuit; a control circuit that controls the plurality of switching elements according to a control signal received from the controller; a power supply that lowers a voltage of a first capacitor to generate a power supply voltage and supplies the power supply voltage to the control circuit; and a current-limiting resistance circuit having a variable resistance value and disposed between the main circuit and the power supply. The power supply includes a second capacitor, an overcharge suppression circuit, a power supply circuit, and a controller. The controller includes: an overcharge suppression control circuit that controls the overcharge suppression circuit in accordance with a magnitude of a voltage of the second capacitor; and a resistance switching circuit that changes a resistance value of the current-limiting resistance circuit in accordance with a magnitude of a voltage of the first capacitor.

Abstract: A power delivery system may include a power converter configured to electrically couple to a power source and further configured to supply electrical energy to one or more loads electrically coupled to an output of the power converter and control circuitry configured to control the power converter in accordance with a control variable.

Abstract: There is provided a semiconductor device that includes a switch terminal; a ground terminal; an output switch connected between the switch terminal and the ground terminal and configured to be switchable between a first on-resistance value and a second on-resistance value higher than the first on-resistance value; a detection circuit configured to detect a short-circuit abnormality of the switch terminal by monitoring a switch voltage that appears at the switch terminal in a predetermined detection period; and a controller configured to perform a pulse-drive of the output switch by setting the output switch to the second on-resistance value in the detection period, continuously perform the pulse-drive of the output switch by setting the output switch to the first on-resistance value if the short-circuit abnormality of the switch terminal is not detected, and forcibly stop the pulse-drive of the output switch if the short-circuit abnormality of the switch terminal is detected.

Abstract: A neutral point clamped inverter with an upper half-bridge and a lower half-bridge, wherein each half-bridge has an inner transistor and an outer transistor, where the inner transistor of the upper half-bridge is configured to interact with the outer transistor of the upper half-bridge such that a signal that reproduces the switch state of the inner transistor is coupled into an actuation circuit for switching the outer transistor and influences the switch state of the outer transistor.

Abstract: A converter to convert an input voltage into a regulated output current for supplying a load includes a reverse current protection diode having an anode coupled to the input voltage and a cathode, an energy storage element coupled to the cathode of the reverse current protection diode, a high side transistor coupled to the energy storage element and responsive to a high side control signal, and a low side transistor coupled to the energy storage element and responsive to a low side control signal. A controller is configured to generate the high side control signal and the low side control signal such that the low side transistor is enabled and the high side transistor is disabled during a pre-regulation interval.

Abstract: An apparatus is disclosed for harvesting ringing energy. In an example aspect, the apparatus includes a bootstrap circuit. The bootstrap circuit includes a bootstrap capacitor and a bootstrap switch. The bootstrap switch includes a first terminal configured to accept an input voltage. The bootstrap switch also includes a second terminal coupled to the bootstrap capacitor. The bootstrap switch additionally includes a body diode comprising an anode coupled to the first terminal and a cathode coupled to the second terminal. The bootstrap switch is configured to be in an open state to charge the bootstrap capacitor via the body diode. The bootstrap switch is also configured to provide a voltage at the second terminal of the bootstrap switch. The voltage is greater than an average of the input voltage.

Abstract: A drive circuit includes a first driver to control on/off of an upper arm, a second driver to control on/off of a lower arm, a first switching device including a first terminal connected with a power supply for the first driver, a second terminal connected with a power supply for the second driver and a control terminal, a booster circuit to turn on the first switching device by boosting a control signal which is at a high level when the lower arm is in an on state, a second switching device to cause continuity between the control terminal and the booster circuit when the control signal is at the high level, and first switch unit to short-circuit the control terminal and the terminal for grounding when the control signal is at the low level.

Abstract: Disclosed are a voltage switching circuit and a power adapter having the same. The voltage switching circuit comprises a first switching circuit having a first terminal receiving a first voltage from a first converter, and a second switching circuit having a first terminal receiving a second voltage from a second converter. Second terminals of the first and second switching circuits are electrically connected to form a switching terminal for outputting an output voltage. When the output voltage is required to be switched from the first voltage to the second voltage, the first switching circuit is controlled to be turned off and then the second switching circuit is controlled to be turned on, and when a voltage at the first terminal of the second switching circuit is higher than a preset voltage, the second converter is shut down or kept off.

Abstract: Disclosed is an electronic device, which includes a direct voltage to direct voltage converter, and a controller that receives first current information, second current information, an input voltage, and a feedback voltage from the direct voltage to direct voltage converter, controls the direct voltage to direct voltage converter based on the input voltage in one of a first mode, a second mode, or a third mode, controls the direct voltage to direct voltage converter based on the first current information and an output voltage such that buck conversion is performed in the first mode and the second mode, and controls the direct voltage to direct voltage converter based on the second current information and the output voltage such that boost conversion is performed in the second mode and the third mode.

Abstract: An electromagnetic connector is disclosed that is configured to form a first magnetic circuit portion comprising a first core member and a first coil disposed of the first core member. The electromagnetic connector is configured to mate with a second electromagnetic connector, where the second electromagnetic connector is configured to form a second magnetic circuit portion comprising a second core member and a second coil disposed of the second core member. The first core member and the second core member are configured to couple the first coil to the second coil with a magnetic circuit formed from the first magnetic circuit portion and the second magnetic circuit portion when the electromagnetic connector is mated with the second electromagnetic connector. The magnetic circuit is configured to induce a signal in the first coil when the second coil is energized.

Abstract: A control circuit is configured to control a flyback circuit comprising a primary-side switch, a secondary-side rectifier and a transformer. The control circuit comprises a feedback control circuit configured to generate a secondary-side control signal based on a current ripple signal of the transformer, and at least one of a direct-current component of an output voltage signal and a direct-current component of an output current signal of a secondary side of the flyback circuit, wherein the secondary-side control signal is configured to control a turn-off of the secondary-side rectifier, an isolated transmission circuit coupled to the feedback control circuit and configured to generate a first primary-side control signal based on the secondary-side control signal, and a primary control circuit coupled to the isolated transmission circuit and configured to control a turn-on of the primary-side switch in response to receiving the first primary-side control signal.

Abstract: This disclosure includes systems, methods, and techniques for controlling a semiconductor device of a power converter. For example, a circuit includes first control circuitry configured to receive an indication of a first voltage which represents a voltage output from a power source to the power converter. Additionally, the first control circuitry is configured to output a control signal to second control circuitry in order to control, based on the first voltage and the second voltage, the semiconductor device so that a second voltage is lower than the first voltage, wherein the second voltage represents a voltage output from the power converter to a load.

Abstract: In at least some examples, an apparatus includes a logic circuit, first transistor, and second transistor. The logic circuit has a first logic circuit output, and a second logic circuit output. The first transistor has a first transistor gate, a first transistor source, and a first transistor drain, the first transistor gate coupled to the first logic circuit output, the first transistor drain adapted to couple to a voltage source, and the first transistor source coupled to a switching terminal. The second transistor has a second transistor gate, a second transistor source, and a second transistor drain, the second transistor gate coupled to the second logic circuit output, the second transistor drain adapted to couple to the voltage source, and the second transistor source coupled to the switching terminal, wherein a transistor width of the second transistor is larger than a transistor width of the first transistor.

Abstract: A voltage regulator can include an input device, a current mirror, one or more offset control circuits, an output device, and a positive feedback loop. The input device can be configured to receive a source voltage from a voltage source. The current mirror can be coupled to the input device and configured to provide load current regulation within the voltage regulator. The one or more offset control circuits can be configured to balance voltage levels within the voltage regulator. The output device can include at least a first transistor that is matched to a second transistor within the voltage regulator such that the matching is configured to provide supply regulation within the voltage regulator. The positive feedback loop can be formed at least in part by the current mirror, the first transistor and the second transistor.

Abstract: An electromagnetic connector is disclosed that is configured to form a first magnetic circuit portion comprising multiple coils disposed about a first core member. The electromagnetic connector is configured to mate with a second electromagnetic connector that is configured to form a second magnetic circuit portion comprising a coil disposed about a second core member. When the electromagnetic connector is mated with the second electromagnetic connector, the first core member and the second core member are configured to couple the multiple coils of the electromagnetic connector to the coil of the second electromagnetic connector with a magnetic circuit formed from the first magnetic circuit portion and the second magnetic circuit portion. The magnetic circuit is configured to induce a signal in a first coil of the multiple coils and the coil of the second electromagnetic connector when a second coil of the multiple coils is energized.

Abstract: A fully isolated drive circuit to be used for regulating an output voltage across a load. The isolated drive circuit may charge, discharge, or preserve the load charge using a controller that controls one or more switches. The controller may operate a switch according to an internal/external clock or an external control signal received by the controller. The isolated drive circuit may be an effective solution to simplify the drive design and decrease the amount of energy dissipated by the drive, especially when the load, associated with the drive, requires a high input voltage level.