5 results about "Single phase converter" patented technology

A circuit for discharging an energy store of a drive system includes a power electronics unit in an on-board electrical system and a single-phase DC / DC converter connected upstream of the drive system. The converter includes a first capacitor, a coil connected downstream of the first capacitor, a first switch, a second switch connected downstream of the coil, and a second capacitor connected downstream of the second switch. The first switch is for a first current circuit including the first capacitor and the coil, and the second switch is for a second current circuit including the first capacitor, the second capacitor, and the coil. During a discharge process, the first switch and the second switch are designed to be switched in an alternating manner and differently relative to each other such that either the first current circuit or the second current circuit is closed to actively discharge the energy store.

The utility model relates to a load converter device for quickly switching alternating current, which comprises alternating current load equipment, the alternating current load equipment comprises a load equipment shell, and a converter main body is arranged in the load equipment shell; a converter main body is arranged in the load equipment shell; the converter main body is divided into a three-phase converter main body and a single-phase converter main body; during installation or use, if a three-phase load needs to be used, the three-phase converter main body is connected; when a single-phase load is needed, the single-phase converter main body is connected, plugging operation is carried out at the wiring terminal, operation can be carried out without using any tools such as a screwdriver, and the purpose of rapid, safe and convenient switching can be achieved. Compared with the prior art, the load converter device provided by the utility model not only can improve the test work efficiency and reduce the test cost, but also can avoid the hidden danger phenomenon of unsafe risk caused by separate wiring or repeated wiring operation.

A multi-phase DC-DC converter is described with a number N (N > 1) of parallel-connected single converters serving as phases, which are connected to a common input terminal and a common output terminal, to which a decoupling capacitor (Ci', Co') is connected in each case, wherein a measurement signal coupling circuit is connected to the input and / or the output terminal, each of which is connected to a circuit between the input and / or output terminal.The first series circuit, consisting of a first capacitor (Ci, Co) and a first resistor (Ri, Ro), is connected to the output terminal and a reference potential terminal. A second series circuit, consisting of a second capacitor and a second resistor (Rdet), is connected to the center tap of the first series circuit. The terminal of the second resistor (Rdet) not connected to the second capacitor (Cdet) is connected via a third resistor (Roff) to an auxiliary voltage source (Voff) and via a reverse-biased diode (Ddet) to the reference potential, forming the input or output measurement terminal (RIPPLE_IN or RIPPLE_OUT).

The invention relates to a power converter (100) for converting multi-phase AC mains input power (GIV, GIC) into DC output power. In order to enable an efficient, cost-effective, easy-to-install, and reliable power supply to a DC load with high power requirements, it has at least one phase block (106A, 106B), each of which has at least two separate single-phase converter string assemblies (1), each of which has a single active rectifier section (10) comprising an H-bridge with semiconductor switches (12) for rectifying single-phase AC input power (SInV, SInC) into intermediate DC power, and its own DC-DC converter (20).The latter comprises an inverter section (30) with an H-bridge with semiconductor switches (32) for inverting the intermediate DC power into a first intermediate AC power (PAC1) with an increased frequency (f1), a transformer (40, 240) for converting the first intermediate AC power (PAC1) into a second intermediate AC power (PAC2, PAC2A, PAC2B), and a passive diode rectifier (50, 150, 250) comprising a diode bridge (51) for rectifying the second intermediate AC power (PAC2, PAC2A, PAC2B). The invention also relates to a hydrogen production plant (200) with an electrolyzer stack (20) and such a power converter (100).

The application discloses a full-integrated coupled oscillation DCDC converter with uniform phase interleaving, comprising a multiphase converter, an error amplifier and a multiphase control logic module; the multiphase converter is composed of a plurality of single-phase converters arranged in cascade, and the load output end of each single-phase converter is connected in parallel with the negative-phase input end of the error amplifier to output a voltage signal to the error amplifier; the error amplifier generates a control signal according to the output voltage of the multiphase converter and a reference voltage and outputs the control signal to the multiphase control logic module; the multiphase control logic module generates a corresponding pulse width modulation signal according to the control signal, which is input as an enable signal of the single-phase converter to control the activation number of the single-phase converter, so that the phases of the output voltage of the multiphase converter are uniformly interleaved. On the basis of retaining the grid charge recycling characteristic, the application realizes inherent even-phase interleaving, balanced current of each phase and balanced current of each inductor, and has a fast starting scheme, thereby improving the load transient performance.