An interlocking adapter in one aspect of the present disclosure includes a current path, an electric load, a switch, and a controller. The controller turns on and off the switch in synchronization with a change of an alternating-current voltage received from an electric outlet of an electric apparatus in response to reception of an interlocking command signal from a working machine so as to supply a load current from the electric outlet to the electric load. The controller turns on and off the switch at a specified ratio of a time every cycle of the alternating-current voltage.

The present invention concerns an electronic device comprising: a first switch (T1) having a single voltage blocking direction; a second switch (T2) electrically in series with the first switch between two nodes (15, 17) of application of a DC voltage; and a module configured to supply the second switch with a control signal, referenced to the potential (COM) of a midpoint (16) between the two switches.

A load control device for controlling the amount of power delivered from an AC power source to an electrical load is operable to conduct enough current through a thyristor of a connected dimmer switch to exceed rated latching and holding currents of the thyristor. The load control device comprises a controllable-load circuit operable to conduct a controllable-load current through the thyristor of the dimmer switch. The load control device disables the controllable-load circuit when the phase-control voltage received from the dimmer switch is a reverse phase-control waveform. When the phase-control voltage received from the dimmer switch is a forward phase-control waveform, the load control device is operable to decrease the magnitude of the controllable-load current so as to conduct only enough current as is required in order to exceed rated latching and holding currents of the thyristor.

An apparatus for an alpha trim adjustment includes a phase delay circuit that creates a phase delay for a gate signal for a switching cycle. The gate signal is for a phase of a three-phase, phase shifted alternating current (AC) input of a multi-pulse motor drive powering a direct current (DC) motor. The apparatus includes an alpha trim circuit that modifies the phase delay with an alpha trim adjustment to create an adjusted phase delay for the switching cycle, a delay application circuit that applies the adjusted phase delay to the gate signal.

The disclosure discloses a driver circuit that is intended for a power semiconductor switch having a unidirectional flow direction and having a control connection, a reference potential connection and a controlled connection. The driver circuit includes a driver module having a control output, a reference potential input and an overvoltage monitoring input. In this case, the control output is connected to a first connection that is provided for connection to the control connection, the reference potential input is connected to a second connection that is provided for connection to the reference potential connection, and the overvoltage monitoring input is connected, via a first diode, to a third connection that is provided for connection to the controlled connection. The overvoltage monitoring input is also connected to the reference potential input via a capacitance. A connection path from the second connection to the third connection via the capacitance and the first diode is switchable in the driver circuit by means of an actively controllable switching element. Furthermore, the disclosure also discloses a circuit arrangement comprising such a driver circuit and a power semiconductor switch with a unidirectional flow direction as well as a bidirectional circuit arrangement comprising two subcircuit arrangements that are each formed by such a circuit arrangement. Such a bidirectional circuit arrangement is used in an inverter having a BSNPC bridge circuit.

A first inverter has a set of first output phases coupled to a grid voltage source. A second inverter has a set of second output phases coupled to the grid voltage source. A phase measurement device is adapted to measure at least one reference phase of the grid voltage source at a reference phase point. An electronic data processor is configured to determine an observed phase difference between the reference phase point and an observed position sample of one of a pulse-width-modulation carrier signal of the first inverter, the second inverter, or each parallel-coupled inverter. The electronic data processor is configured to determine a target phase difference between the reference phase point and target position sample of one of the pulse-width-modulation carrier signal. The electronic data processor is configured to determine a frequency adjustment to the pulse-width-modulation carrier signal of the first inverter, the second inverter, or all parallel-coupled inverters, based on a difference between the observed phase difference and the target phase difference.

A semiconductor device has an A/D converter configured to convert an analog signal representing a current flowing in a control target into a digital signal, an overcurrent determination unit configured to, based on the analog signal, determine that an overcurrent has occurred in the control target when the current flowing in the control target has exceeded an overcurrent threshold, and determine that the overcurrent has not occurred in the control target when the current flowing in the control target has not exceeded the overcurrent threshold, a drive control signal generation unit configured to generate a drive control signal for controlling driving of the control target so that the current flowing in the control target is equal to a target current, based on a conversion result of the A/D converter, and generate the drive control signal to reduce the current flowing in the control target when the overcurrent determination unit determines that the overcurrent has occurred, and an overcurrent threshold setting unit configured to set the overcurrent threshold based on the conversion result of the A/D converter and the target current.

The invention relates to a multi-level modular converter provided with a control circuit comprising a computer to calculate an internal control setpoint of the converter and an energy management circuit allowing a power setpoint to be determined that is to be transmitted to the alternating electrical power supply network, the control circuit being configured to regulate the voltage at the point of connection of the converter to the direct electrical power supply network and to regulate the voltage at the terminals of each capacitor modelled as a function of the internal control setpoint and of the power setpoint to be transmitted to the alternating electrical power supply network.

An apparatus for an alpha trim adjustment includes a phase delay circuit that creates a phase delay for a gate signal for a switching cycle. The gate signal is for a phase of a three-phase, phase shifted alternating current (AC) input of a multi-pulse motor drive powering a direct current (DC) motor. The apparatus includes an alpha trim circuit that modifies the phase delay with an alpha trim adjustment to create an adjusted phase delay for the switching cycle, a delay application circuit that applies the adjusted phase delay to the gate signal.

A semiconductor apparatus may include a logic circuit and a power control circuit. The logic circuit operates by being supplied with power through a power line. The power control circuit includes a plurality of power switches, and supplies a first power supply voltage and a second power supply voltage to the power line. When a mode of the semiconductor apparatus is changed, the power control circuit causes the plurality of power switches to sequentially stop supplying one of the first power supply voltage and the second power supply voltage to the power line, and then causes the plurality of power switches to sequentially supply the other of the first power supply voltage and the second power supply voltage to the power line.