An overvoltage protection circuit configured to prevent an overvoltage of an output voltage of a switching converter, can include: an output voltage simulation circuit configured to generate an output voltage simulation signal according to circuit parameters of the switching converter, where the output voltage simulation signal changes along with the output voltage; and an overvoltage signal generator configured to activate an overvoltage signal when a feedback voltage is less than a first threshold value and the output voltage simulation signal is greater than a second threshold value.

An isolated bus inverter system including inverter circuits and a controller. The inverter circuits include a switching array to provide a polyphase alternating current (AC) signal to an output. Each of the inverter circuits includes an energy source isolated from the other inverter circuits of the inverter circuits or a reference isolated from the other inverter circuits of the inverter circuits. The controller is configured to generate timing signals for the inverter circuits to generate the AC signals for the output based on DC signals received from one or more rectifier circuits.

Technologies for alternating current regulation controller include a controller configured to determine a voltage duty cycle based on a target voltage, and to determine a delay time based on the voltage duty cycle. The controller is coupled to input phases of an alternating current generator having multiple phases. Each phase is coupled to a silicon controlled rectifier. For each phase, the controller identifies a rising edge asserted on the input phase, waits the delay time after identifying the rising edge, and asserts an output pulse on an output driver coupled to the silicon controlled rectifier coupled to the input phase in response to waiting the delay time. Other embodiments are described and claimed.

A control circuit for a power converter comprising switching transistors and an output inductor is disclosed. One terminal of the output inductor serves as an output node, and another terminal of the output inductor serves as a switching node. The control circuit is configured to generate a control signal for controlling switching transistors in the power converter. The control circuit includes: a RC oscillator network connected to two terminals of the output inductor, the RC oscillator network configured to generate an oscillation signal containing a feedback ramp slope compensation component in response to a change in a voltage across the terminals of the output inductor; a comparator; an on-time generation circuit; and a control signal generation circuit to generate the control signal for controlling the switching transistors in the power converter.

Provided is a method for controlling a current converter, in particular an inverter, preferably a frequency converter comprising an inverter, in particular of a wind power installation. He method includes specifying a tolerance band that has at least one band limit for the current converter, in particular for one or more switching devices of the current converter, specifying a delay that includes a dead time, in particular for the switching devices, sensing an actual current of the current converter, in particular an actual current of the switching devices, comparing the sensed actual current with the band limit in order to determine a departure from the tolerance band, switching the current converter, in particular the switching devices, in order to come within the tolerance band, and suppressing further, in particular non-system-relevant, switching operations of the current converter, in particular of the switching devices, for the specified dead time

Disclosed is a power control system of adaptive control of turn on time, including a primary side digital controller, a secondary side synchronization controller, a rectification unit, a power unit, a transformer unit, a primary side switch unit, a current sensing unit, a secondary side switch unit, and a secondary side output capacitor for implementing a function of flyback power conversion. The secondary side synchronization controller is intended to turn on or off the secondary side switch unit to achieve a synchronization function of rectification, and the primary side digital controller reduces a primary side drain-source voltage of the primary side switch unit and a secondary side drain-source voltage of the secondary side switch unit by reducing a current sensing limit used to compare with the current sensing signal. The power control system thus greatly improves stability and endurance of the overall operation.

An automotive vehicle includes an electric machine, a traction battery, and a power converter. The power converter transfers power between the electric machine and traction battery. The power convert includes a switch that defines a portion of a phase leg, a gate driver circuit that provides provide power to a gate of the switch, and a clamping circuit. The clamping circuit includes a clamping switch that, responsive to the gate driver circuit being de-energized and a voltage of the gate exceeding a predetermined threshold value, conducts current from the gate to dissipate the voltage and clamp the gate to an emitter of the switch.

An electronic device includes: a switching regulator configured to generate a conversion voltage with respect to an input voltage, based on a switching signal of a first frequency, and output the conversion voltage; a stabilization circuit including a capacitor element connected to a load device via a first node and configured to generate a load voltage by stabilizing the conversion voltage by using the capacitor element and output the load voltage to the load device; a frequency sensing circuit configured to sense a frequency of the load voltage and output sensing information about the frequency of the load voltage; and a frequency booster circuit configured to form a first current path connected to the first node, based on the sensing information.

The subject matter of this specification can be embodied in, among other things, a method that includes receiving a first electrical current output setpoint, identifying a first operational condition based on the first electrical current output setpoint, providing, based on the identified first operational condition, a first pulse width modulated (PWM) signal having a first predetermined duty cycle, based on the first electrical current output setpoint, provided on a predetermined period, receiving a second electrical current output setpoint, identifying a second operational condition different from the first operational condition based on the second electrical current output setpoint, and providing, based on the identified second operational condition, a second PWM signal having a second predetermined duty cycle, based on the second electrical current output setpoint, provided on a predetermined multiple of the predetermined period.

The present disclosure provides a power supply control device. The power supply control device includes a feedback voltage generator, an on-timing setting unit and an off-timing setting unit. The feedback voltage generator is configured to generate a feedback voltage by sampling a primary voltage of a transformer that forms an insulated switching power supply. The on-timing setting unit is configured to turn on a primary current of the transformer based on a comparison result between the feedback voltage and a slope-shaped reference voltage. The off-timing setting unit is configured to turn off the primary current after a predetermined on time has elapsed since the primary current was turned on. A sampling timing of the primary voltage is set based on an on timing of the primary current.