L-3 Communications Magnet-motor Gmbh

Kay Peschke

Jens Biebach

A method of controlling a DC/AC converter () comprises the steps of (a) providing a desired AC side reference value (V); (b) setting a reference correction value (V); (c) calculating an AC side reference signal (V) as a function of the desired AC side reference value (V) and the reference correction value (V); (d) obtaining an actual AC side signal (V); and (e) calculating a converter control signal (M) as a function of the AC side reference signal (V) and the actual AC side signal (V); wherein the setting of the reference correction value (V) is based on a relation of the desired AC side reference value (V) and the actual AC side signal (V).

Method of controlling a DC/AC converter

A galvanically isolated DC/DC converter includes a first and a second side converter circuit coupled between a pair of first side DC terminals and a pair of second side DC terminals, respectively. The first side converter circuit has a first and a second switching element, each including a switch and a diode. When the DC/DC converter is in power transfer operation from the second side DC terminals to the first side DC terminals, the second side converter circuit alternates between two power transfer states. A conductive state of the diode of one of the first and second switching elements is the result of one of the two power transfer states. The first side converter circuit is controlled such that the switch of the respectively other of the first and second switching elements is closed for an adaptation interval before the one of the two power transfer states starts.

Galvanically isolated DC/DC converter and method of controlling a galvanically isolated DC/DC converter

A galvanically isolated DC/DC converter includes at least one first side converter circuit coupled between a pair of first side DC terminals, and at least one second side converter circuit coupled between a pair of second side DC terminals. The second side converter circuit has at least a first and a second switching element, each including a switch and a diode connected in parallel. When the DC/DC converter is in power transfer operation from the pair of first side DC terminals to the pair of second side DC terminals, the diodes of the first and second switching elements are alternately in a conductive state, with each of the first and second switching elements being controlled such that a closed state of the respective switch extends beyond a transitioning of the diode of the same switching element from the conductive state to a blocking state.

A DC/AC converter includes a DC/DC conversion stage with galvanic isolation and a DC/AC conversion stage, wherein the DC/DC conversion stage comprises a pair of first side terminals providing or receiving a first DC voltage, a pair of second side terminals providing or receiving a second DC voltage and coupled to the DC/AC conversion stage, at least one first side converter circuit coupled between the pair of first side terminals, a series connection of a plurality of second side converter circuits coupled between the pair of second side terminals, and at least one transformer circuit coupling the plurality of second side converter circuits to the at least one first side converter circuit, wherein a connection point between two of the plurality of second side converter circuits is coupled to the DC/AC conversion stage and forms a neutral phase point thereof.

Growing community of inventors

Tutzing, Germany

Kay Peschke