A power device includes an active area having at least two switchable regions with different threshold voltages.

In some examples, an electrical power system includes a differential bus, a power converter coupled to the differential bus, and a controller configured to control the power converter based on a first target value for the differential bus. The controller is also configured to sense that a ground fault has occurred in the electrical power system while controlling the power converter based on the first target value. The controller is further configured to, responsive to sensing that the ground fault has occurred, control the power converter based on a second target value for the differential bus, the second target value being different than the first target value.

A system, a switch assembly and an associated method. The system includes a number of switch assemblies, each including a switch module, isolation circuits, a detection unit, and a drive unit. The switch module includes power switch devices connected in parallel. The switch modules are connected in series. The isolation circuits each are connected in series to a gate terminal of at least one corresponding power switch device of the power switch devices. Each isolation circuit includes a capacitor or a controllable switch. The detection unit detects faults in at least one of the power switch devices. The drive unit is coupled to the switch module via the isolation circuits for driving the power switch devices of the corresponding switch module, and when the fault is detected, the drive unit is for turning on the power switch devices parallel connected to the at least one of faulty power switch devices.

A motor control system for selectively controlling power from a power source to a load is provided. The motor control system includes at least one PCB structure and a plurality of protection and control components mounted onto the at least one PCB structure so as to be electrically coupled therewith. The plurality of protection and control components includes a power converter operable to provide a controlled output power to the load, a plurality of switching devices operable to selectively control power flow from the power source into the power converter and to bypass the power converter, and one or more protection devices configured to selectively interrupt current flow from the power source to the power converter during a fault condition. The motor control system also includes a housing enclosing the at least one PCB structure and the plurality of protection and control components.

A semiconductor module includes a diode bridge circuit, a sensor configured to measure a current value of the diode bridge circuit, a current limiting circuit having an IGBT connected to the diode bridge circuit, and a protection circuit configured to switch ON and OFF the IGBT in accordance with the current value of the diode bridge circuit measured by the sensor.

An overcurrent detection circuit includes a di/dt detection circuit to detect di/dt of a current Ie that flows in an emitter of an IGBT, a control circuit to detect whether the current Ie is an overcurrent based on di/dt and to output a detection result to a driving circuit, and a mask circuit to set a mask period in which an operation of overcurrent determination in the control circuit is masked.

A circuit for minimizing energy provided to a ground fault includes a source, a multiple switches, an output filter, and a controller. The switches include a first side pair of switches and a second side pair of switches configured to provide an output signal based on the source. The output filter includes one or more energy storage elements coupled to the first side pair of switches or the second side pair of switches. The controller is configured to receive a ground fault signal that indicates a fault has occurred and configured to generate a switch signal for the switches for a minimum energy state of the output filter and in response to the ground fault signal.

In an abnormality determination system, when a drive signal is input and no shutdown signal for stopping gate drive of switching elements is input, a signal switching section outputs the drive signal to a bridge circuit. When a shutdown signal is input, the signal switching section stops output of the drive signal and activates a shutdown function of an inverter. An abnormality determination section determines an abnormality in the shutdown function. When a power source relay is opened, a control unit drives the bridge circuit to start a discharge process of discharging electric charge from a smoothing capacitor, and activates the shutdown function during execution of the discharge process. When it is determined that a directly or indirectly detected voltage of the smoothing capacitor has dropped during operation of the shutdown function, the abnormality determination section determines that the shutdown function is abnormal.

An electrical converter, comprising a plurality of first modules and a plurality of second modules. At least one of the plurality of first modules includes a half-bridge module coupled with a direct current (DC)-link capacitor. A diode connected across the DC-link capacitor and a thyristor. At least one of the plurality of second modules is connected to at least one of the plurality of first modules.

Embodiments of the present disclosure include an electrical receptacle, comprising a base formed of electrically insulating material and arranged to hold at least one pair of electrically conductive terminals, and a cover formed of electrically insulating material and configured to be joinable with the base. The cover can comprise a top portion having a bottom surface, and at least one separating tab attached to the bottom surface at an angle of 90 degrees. Each separating tab can be arranged to separate opposite terminals, of a terminal pair, only when the cover is at least partially joined with the base. Base and cover can include, respectively, locking tabs and receptacles configured to engage when base and cover are fully joined. Embodiments also include power supply circuits comprising a DC-AC inverter, a load protection circuit, and embodiments of the electrical receptacle. Embodiments also include methods for protecting a power supply circuit.