A direct-current (DC) power generation system for a vehicle, a boosting shunt regulator, and a method of regulating the output of an AC generator with the boosting shunt regulator are provided. The boosting shunt regulator includes gated power switches electrically coupled between AC generator contacts and output contacts. A shunt operates the power switches at duty cycles selected to boost the AC voltages output by the AC generator.

A chip package is provided. The chip package includes a semiconductor chip having on a front side a first connecting pad and a second connecting pad, a carrier having a pad contact area and a recess, encapsulation material encapsulating the conductor chip, a first external connection that is free from or extends out of the encapsulation material, an electrically conductive clip, and a contact structure. The semiconductor chip is arranged with its front side facing the carrier with the first connecting pad over the recess and with the second connecting pad contacting the pad contact area. The clip is arranged over a back side of the semiconductor chip covering the semiconductor chip where it extends over the recess. The electrically conductive contact structure electrically conductively connects the first connecting pad with the first external connection.

A motor drive device 1 is provided with: a converter unit 11 which converts input alternating-current power into direct-current power and outputs the same to a DC link; a DC link capacitor 4; voltage dividing resistors 13-1, 13-2 which are connected in series with one another and which are provided between a positive potential line and a negative potential line of the DC link; a measurement resistor 14 connected between the connecting point of the voltage dividing resistors 13-1 and 13-2 and the positive potential line or the negative potential line of the DC link; a resistance voltage measuring unit 15 for measuring the resistance voltage across the measurement resistor 14; a direct current component extracting unit 16 for extracting the direct current component of the resistance voltage; an alternating current component extracting unit 17 for extracting the alternating current component of the resistance voltage; a DC link potential measuring unit 18 for measuring the positive potential and the negative potential of the DC link; and an insulation resistance value calculating unit 19 for calculating the insulation resistance value of a motor 3 on the basis of the direct current component and the alternating current component of the resistance voltage, and the positive potential and the negative potential of the DC link.

A method of monitoring a split wind-turbine-converter system with at least one generator-side converter and at least one grid-side converter arranged at distant locations, and a DC-link in the form of an elongated conductor arrangement with at least one positive and at least one negative conductor. The impedance of the DC-link conductor arrangement is determined by means of DC-voltage sensors. The voltages between the positive and the negative conductors are determined at the generator-side converter and at the grid-side converter, and the difference between the voltages is determined. The impedance of the DC-link conductor arrangement is determined by putting the determined voltage difference in relation to the DC current flowing through the DC-link conductor arrangement. If the impedance exceeds a given impedance threshold a fault state is recognized.

Systems and methods for controlling operation of a power converter based on grid conditions are provided. In particular, a first gating voltage can be applied to a switching element of a power converter associated with a wind-driven power generation system. The first gating voltage can be greater than a threshold voltage for the switching element. A grid event associated with an electrical grid coupled to the power generation system can be detected. A second gating voltage can be applied to the gate of the switching element during the detected grid event. The second gating voltage can be greater than the first gating voltage.

According to one embodiment, a motor drive apparatus is an apparatus which drives a motor including a plurality of phase windings in a mutually unconnected state, and includes first and second inverters. The first and second inverters are first and second modules each of which is configured in such a manner that a switching circuit including a positive side terminal and negative side terminals and a drive circuit intended to drive the switching circuit are accommodated in one package, and which possess configurations identical to each other, and the first and second modules are arranged on a circuit board in a state where the negative side terminals of the modules are respectively close to each other.

A method and a control device for regulating a drive device includes an electric motor with a motor shaft and a converter for supplying power to the electric motor. To this end, measured values of measured variables, which characterize a power loss of the drive device, are detected and a converter output voltage is adjusted depending on the detected measured values in such a way that the power loss decreases.

A system has a DC bus circuit with first and second terminals, an intermediate node, first and second capacitors, first and second depletion mode FETs, and first and second switching control circuits, where the first depletion mode FET has a drain coupled to the first bus terminal, a source, and a gate coupled to the intermediate node, the second depletion mode FET has a drain coupled to the intermediate node, a source, and a gate coupled to the second bus terminal, the first switching control circuit turns the first depletion mode FET off responsive to a first capacitor voltage of the first bus capacitor being less than or equal to a second capacitor voltage of the second bus capacitor, and the second switching control circuit turns the second depletion mode FET off responsive to the first capacitor voltage being greater than or equal to the second capacitor voltage.

A semiconductor device includes: a carrier including an electronic circuit; a plurality of semiconductor chip packages mounted on the carrier, each of the chip packages including an encapsulation encapsulating the semiconductor chip, a plurality of contact structures electrically connecting the semiconductor chip with the electronic circuit, and at least one cooling structure protruding from the encapsulation; and a cooling element thermally conductively connected to at least one cooling structure of each of at least two of the plurality of semiconductor chip packages.

Power conversion systems and methods are provided for ride through of abnormal grid conditions or disturbances, in which a system rectifier is operated in a first mode to regulate a DC voltage of an intermediate DC circuit, an inverter is operated in the first mode to convert DC power from the intermediate DC circuit to provide AC output power to drive a load. In response to detecting an abnormal grid condition, the system changes to a second mode in which the rectifier is turned off and the inverter regulates the DC voltage of the intermediate DC circuit using power from the load.