Circuits and methods for protecting the switches of charge pump-based power converters from damage if a V.sub.OUT short circuit event occurs and/or if V.sub.IN falls rapidly with respect to V.sub.X or V.sub.OUT. A general embodiment includes a V.sub.X Detection Block coupled to the core block of a power converter. The V.sub.X Detection Block is coupled to V.sub.X and to a control circuit that disables operations of an associated converter circuit upon detection of large, rapid falls in V.sub.X during the dead time between clock phase signals, thereby prevent damaging current spikes. Some embodiments include a V.sub.IN Detection Block configured to detect and prevent excessive in-rush current due to rapidly falling values of V.sub.IN to the power converter. The V.sub.IN Detection Block is coupled to V.sub.IN, and to V.sub.X or V.sub.OUT in some embodiments, and to a control circuit to that disables operation of an associated converter circuit.

A wind turbine with a power converter system having a plurality of power modules each with a semiconductor component, such as IGBTs, and a temperature sensor arranged in thermal connection with the semiconductor component for generating a temperature signal according to a sensed temperature. A controller receives the temperature signals from the respective power modules, and the controller can shut down operation of the power converter system in case one or more of the temperature signals indicate a temperature exceeding a trip temperature threshold, wherein the controller is arranged to monitor at least one parameter and to update the trip temperature threshold accordingly.

A wind turbine with a power converter system having a plurality of power modules each with a semiconductor component, such as IGBTs, and a temperature sensor arranged in thermal connection with the semiconductor component for generating a temperature signal according to a sensed temperature. A controller receives the temperature signals from the respective power modules, and the controller can shut down operation of the power converter system in case one or more of the temperature signals indicate a temperature exceeding a trip temperature threshold, wherein the controller is arranged to monitor at least one parameter and to update the trip temperature threshold accordingly.

A short-circuit protection apparatus includes a first detection branch, a second detection branch, and a controller. The first detection branch includes a first sampling resistor and a first sampling capacitor that is connected in parallel to the first sampling resistor. A difference between an absolute value of a second sampling voltage and an absolute value of a first sampling voltage is a first difference. The controller obtains a comparison result between an absolute value of a first sampling voltage at two terminals of the first sampling resistor and an absolute value of a second sampling voltage at two terminals of the second sampling resistor, and if a difference between the absolute value of the second sampling voltage and the absolute value of the first sampling voltage is a second difference and the second difference is less than the first difference, controls the target circuit to stop working.

The system proposed in this invention allows the conversion of energy from an AC/DC source, located on a platform (surface) and transmitted through an umbilical to a robot that operates on flexible lines, converting the electrical voltage to levels suitable for supplying the robotic system, and can also be used for supplying other pieces of equipment that operate with low voltage and require power high-density and protection against voltage transients.

The system of the invention consists of a surface source (2), fed by the platform's three-phase grid (1), an umbilical cable (3), which connects the source to the robot, an overvoltage protection circuit (4), and a two-stage conversion modular system (5 and 6).

A power device includes one or more electrical components, the electrical components including one or more physical attribute. The power device includes one or more sensors configured to monitor the attribute(s). The power device includes a non-transitory computer-readable storage medium including one or more alerting rule. The power device includes one or more processors configured for retrieving the one or more alerting rule from the storage medium. The processors are configured for monitoring one or more sensor value from the sensor(s), wherein the sensor values are associated with the attribute(s). The processors are configured for evaluating the at least one alerting rule during the monitoring, and when the one or more alerting rule results in a pending failure condition, sending a notification to a user.

A power supply system includes first and second power supply lines to respectively connect positive and negative electrode terminals of a load with a main power supply. First and second voltage detection lines are respectively connected to the first and second power supply lines via first and second resistances. First and second inspection power supplies respectively supply power and provide potential differences to the first and second voltage detection lines from the first and second power supply lines. Occurrence of a short circuit in one of the first and second voltage detection lines is recognized when corresponding one of the first and second inspection power supplies supplies power and a difference between a preset voltage and a voltage caused between the first and second voltage detection lines is a threshold value or more.

A system for limiting a peak current of short-circuit current comprises a first high-frequency branch configured to provide a first high-frequency current to a first switch (1SKa) of a first phase branch of a three-phase AC when the first phase branch occurs a short-circuit; a second high-frequency branch configured to provide a second high-frequency current to a second switch (1SKc) of a second phase branch of the three-phase AC when the second phase branch occurs a short-circuit; and a third phase branch of the three-phase AC connected in parallel with the first phase branch and the second phase branch and configured to always supply power.

The present disclosure provides a power integrated circuit (IC) for a switching power supply device that generates an output voltage based on an input voltage. The circuit includes: a high-side transistor, disposed between an input terminal applied with the input voltage and a switch terminal; and a low-side transistor, disposed between the switch terminal and a ground terminal. A feedback control for turning on or off the transistor is performed based on a feedback voltage corresponding to the output voltage. A protection circuit is capable of performing a protection operation for turning on the high-side transistor or the low-side transistor regardless of the feedback control based on a switch voltage at the switch terminal and the input voltage, based on a backflow current from the ground terminal to the switch terminal, or based on the input voltage and a predetermined determination voltage.

Circuits and methods for protecting the switches of charge pump-based power converters from damage if a V.sub.OUT short circuit event occurs and/or if V.sub.IN falls rapidly with respect to V.sub.X or V.sub.OUT. A general embodiment includes a V.sub.X Detection Block coupled to the core block of a power converter. The V.sub.X Detection Block is coupled to V.sub.X and to a control circuit that disables operations of an associated converter circuit upon detection of large, rapid falls in V.sub.X during the dead time between clock phase signals, thereby prevent damaging current spikes. Some embodiments include a V.sub.IN Detection Block configured to detect and prevent excessive in-rush current due to rapidly falling values of V.sub.IN to the power converter. The V.sub.IN Detection Block is coupled to V.sub.IN, and to V.sub.X or V.sub.OUT in some embodiments, and to a control circuit to that disables operation of an associated converter circuit.