45results about How to "High Output Voltage Gain" patented technology

The invention provides a current continuous high-gain switch voltage rise quasi-Z-source converter circuit. The circuit comprises a power supply; a two-port switch voltage rise unit composed of a first inductor, a first diode, a first power switch tube, a first capacitor and a second diode; a quasi-Z-source network composed of a second inductor, a second capacitor, a third capacitor and a third diode; a second power switch tube; a fourth diode; an output capacitor; and a load. The whole circuit is simple in structure; the single-level voltage rise and reduction features of the switch voltage rise unit and the quasi-Z-source network are combined; the higher output voltage gain is realized; the current of the power supply is continuous; the current of the load is continuous; the output and input are in zero potential; there is no start surge current in the circuit; and there is no surge current at the moment when the switch tube is switched on.

Provided are a switched reluctance generator power converter and a regulation method. The power converter includes a main circuit and an excitation circuit, the control loop of each phase winding of the main circuit is composed of two switch tubes and a diode, the two switch tubes are closed when in the excitation process, and the switch tube at the lower end is disconnected during the generation,the switch tube at the upper end and the diode generate power in a flow current manner, the power generation voltage is output to obtain a large gain; the excitation circuit is of a structure and a mode that two isolation type voltage transformation circuits work alternatively after the two isolation type voltage transformation circuits are connected in parallel, in addition to the decoupling ofthe adjustable output excitation voltage from the generation voltage, the two switch tubes are switched on and off alternately, the current output after parallel connection is more stable and the torque ripple inhibition is facilitated, and the whole system is more suitable for being used by a power generation terminal of a local-area direct-current microgrid with medium and small power.

An active clamping-boosting inverter of high-gain isolation type is prepared as realizing high gain output of said inverter by series-connecting the third winding to output capacity of two coupled inductances, absorbing and transferring leakage energy of two coupled inductances nondestructively by series circuit prepared by the first clamping capacity and the first auxiliary switching tube, utilizing series circuit and parallel capacity to realize zero voltage turn on and turn off of said auxiliary switch.

The present invention provides a high-gain quasi-switch boost DC-DC converter circuit. The high-gain quasi-switch boost DC-DC converter circuit includes a voltage source, a two-end quasi-switch boost unit, a second metal-oxide semiconductor (MOS) transistor, a second capacitor, a second diode, an output diode, an output filter capacitor and a load. The two-end quasi-switch boost unit consists of a first capacitor, a first diode, a first MOS transistor, a third diode and an inductor. The whole circuit has a simple structure, combines single-stage boost characteristics of both the quasi-switch boost unit and a switch capacitor, and realizes expansion of an output voltage gain.

The invention provides a switch inductor type hybrid quasi-Z-source inverter. The inverter comprises a voltage source, a switch inductor unit which consists of a first inductor, a second inductor, a fourth diode, a fifth diode and a sixth diode, a switch voltage-boosting unit which consists of a first capacitor, a first diode, a second diode and an MOS transistor S, a quasi-Z-source unit which consists of a third inductor, a second capacitor, a third capacitor and a third diode, a three-phase inverter bridge, an output filtering inductor, a filtering capacitor and a load. The overall circuit combines the single-level voltage-boosting/voltage-bucking characteristics of each of the voltage-boosting unit and the quasi-Z-source unit as well as the characteristic of the parallel charge and series discharge of the switch capacitor, and has a higher output voltage gain; the output and the input are common-grounded, so that the voltage stress of the switching device in the inverter bridge is reduced; and in addition, the circuit is free of starting impact current and impact current in the switch-on moment of the switching tube.

The invention provides a hybrid T-type multi-level inversion device and a control method thereof. In the inversion device, a capacitor bank string is connected with a DC voltage source Vdc in parallel; the central point of the capacitor bank string is connected with one end of a first reverse-series bridge arm, the other end of the first reverse-series bridge arm is respectively connected with a first connecting end of a middle bridge arm, one end of a second reverse-series bridge arm and one end of a third reverse-series bridge arm, and a T-shaped bridge arm is formed; the first reverse-series bridge arm, the second reverse-series bridge arm, the third reverse-series bridge arm, the middle bridge arm and a voltage-dividing capacitor form a switched capacitor unit; a positive series bridgearm is connected in parallel with the voltage-dividing capacitor; and the central point of the positive series bridge arm and the central point of the capacitor bank string serve as AC voltage outputends of the hybrid T-shaped multi-level inversion device. The technical problem of overlarge voltage stress borne by the switching tube due to increase of output voltage in the switched capacitor multi-level inverter is effectively solved, so that the multi-level inverter is suitable for high-voltage and high-power occasions, and the application range of the inverter is expanded.

The invention provides an isolated type high-gain quasi Z-source DC-DC converter applicable to photovoltaic generation. The DC-DC converter mainly comprises an input direct current voltage source; a quasi Z-source network formed by a first inductor, a first capacitor, a first diode, a second inductor and a second capacitor; a quasi switch boosting unit formed by a second diode, a third diode, a third capacitor, a third MOS transistor and a fourth MOS transistor; a first MOS transistor; a second MOS transistor; a high-frequency transformer T with a transformation ratio of 1:n; a voltage-doubling rectifier formed by a fourth capacitor, a fifth capacitor, a fourth diode and a fifth diode; and a load resistor RL. According to the converter, the whole circuit structure is simple, a current input by a power supply is continuous, higher output voltage gain is achieved with the combination of respective single-stage boosting and voltage-reducing characteristics of the quasi Z-source impendencenetwork and the quasi switch boosting network, electrical isolation between output and input of the transformer is realized through the high-frequency transformer, and the circuit avoids a starting impulse current and an impulse current at the instant of switch-on of a switch tube.

The invention discloses a multi-source power supply system of a digital iron tower on-line monitoring device based on three-port commutation. The system comprises a photovoltaic power generation unit, a wind power generation unit, a snap ring power taking unit and an energy storage unit; and the system comprises a three-port DC-DC converter. The photovoltaic power generation unit, the wind power generation unit and the snap ring power taking unit are connected with the DC bus through a DC-DC converter, a first AC-DC converter and a second AC-DC converter respectively. The direct current bus is connected with the three-port DC-DC converter. The energy storage unit is connected with the three-port DC-DC converter, and the three-port DC-DC converter is connected with a DC load. The three-port DC-DC converter is connected with the energy storage control circuit. According to the system, a multi-source power supply mode is adopted, renewable energy sources are preferentially adopted for power generation and power supply, battery energy storage serves as standby, load power is smoothed and instantaneous power is supported by introducing the energy storage unit, the power supply reliability of the digital iron tower and the utilization rate of electric energy can be greatly improved, the design cost is reduced, and centralized control is achieved.

The invention provides a wide-gain cuk converter. The wide-gain cuk converter mainly comprises a power switch tube, three inductors, two middle energy-storage capacitors, an output capacitor and three diodes. In the working process of the wide-gain cuk converter, the inherent properties of an inductor-capacitor-diode network are utilized, when the power switch tube is switched off, the second inductor charges the first middle energy-storage capacitor, and the first inductor discharges; when the power switch tube is switched on, the first middle energy-storage capacitor and an input power supply charge the first inductor simultaneously, therefore, output voltage is boosted, and the gain of output voltage of the converter is expanded by combining original characteristics of a traditional cuk converter.