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.

The invention discloses a quasi Z-source inverter of an active switched capacitor. The quasi Z-source inverter of the active switched capacitor comprises a voltage source, a quasi Z-source unit, an active switched capacitor unit, a single-phase bridge inverter, an output filtering inductor, an output filtering capacitor and a load, wherein the quasi Z-source unit is composed of a first inductor, a second inductor, a first capacitor, a first diode and a second diode, and the active switched capacitor unit is composed of an MOS tube S, a second capacitor, a third diode and a fourth diode. According to the quasi Z-source inverter of the active switched capacitor, the high-gain property of the quasi Z-source and the property of charging in parallel and discharging in series of the active switched capacitor are combined; compared with traditional Z-source inverters, the number of inductors and capacitors used is the same, but the voltage gain is obviously improved; compared with an enhanced boost quasi Z-source inverter with a switched impedance network, the voltage gains are the same, but the number of inductors and capacitors decreases by two respectively, so that the number of passive components is greatly reduced, a higher output voltage gain is achieved with a lower duty ratio, and the power density of the system is improved.

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 invention provides a high-gain 3-Z type Boost circuit which comprises a first Z network, a second Z network, a third Z network and an output circuit. The first Z network is used as a first-stage boosting module, the third Z network is used as a second-stage boosting module, the second Z network is used as an on-off switching module, and a ninth diode, a second energy storage capacitor and a load are used as an output module. When a switch pipe is connected, a power source is connected in parallel with two inductors and charges the two inductors in the first Z network, a first energy storage capacitor is connected in parallel with two inductors and charges the two inductors in the second Z network, and the second energy storage capacitor discharges the load. When the switch pipe is disconnected, the power source is connected in series with the fist inductor, and then is connected in series with the second inductor to charge the first energy storage capacitor, and therefore the first-stage boosting is finished; the first-stage boosting module is connected in series with the third inductor and then is connected in series with the fourth inductor to charge the second energy storage capacitor, and therefore the second-stage boosting is finished. Only one switch pipe is used in the whole circuit, and high output voltage gain can be achieved.

The invention provides a hybrid type quasi-switch voltage-boosting DC-DC converter. The converter comprises a voltage source, a two-end quasi-Z-source unit which consists of a first inductor, a first diode, a first capacitor, a second inductor and a second capacitor, a quasi-switch voltage-boosting unit which consists of a second capacitor, a second diode, a first MOS transistor, a first diode and a second inductor, a switch capacitor unit which consists of a third capacitor and a third diode, a second MOS transistor, an output diode, an output filtering capacitor and a load. The circuit is simple in structure, combines the single-level voltage-boosting / voltage-bucking characteristics of the quasi-Z-source unit and the quasi-switch voltage-boosting unit as well as the characteristic of the parallel charge and series discharge of the switch capacitor, and expands the output voltage gain.

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 discloses a low-input-current-ripple single-switch high-gain converter which comprises a direct-current input source (Vin), an independent boost inductor (L1), a controllable power switch tube (Q), a coupling inductor provided with a first winding (n1) and a second winding (n2), a clamping diode (D1), a clamping capacitor (C1), a first one-way rectifier diode (D2), a second one-way rectifier diode (D3), a voltage-multiplying capacitor (C2), an energy-storage capacitor (C3) and an output filter capacitor (Co). Compared with traditional Boost converters, the low-input-current-ripple single-switch high-gain converter can utilize the coupling inductor to improve output voltage gain, can reduce crest voltage stress of the power switch tube and the diode and has the advantage of being low in input current ripple, and the overall conversion efficiency of the converter is improved.

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 present invention provides a high-gain quasi-Z-source switch boost inverter suitable for fuel-cell power generation. The inverter comprises a voltage source, a quasi-Z-source network formed by a first inductor, a second inductor, a first capacitor, a second capacitor and a first diode, a switch boost unit formed by a second diode, a third diode, a third capacitor and an MOS tube S7, a three-phase inverter bridge, an output filtering inductor, a filter capacitor and a load. A whole circuit combines single-stage buck-boost features of a quasi-Z-source unit and a switch boost unit and outputshigher output voltage gain, output and input are commonly earthed, voltage stress of a switch device in the inverter bridge is reduced, and the circuit does not have a starting impact current and animpact current at the opening instant of a switch tube.

The invention discloses a three-winding coupled inductor voltage-doubling type single switch tube boost direct-current converter, and belongs to the technical field of power electronic converters. The converter comprises a driving unit, a first voltage-doubling unit, a second voltage-doubling unit and an output unit, the driving unit, the first voltage-doubling unit and the second voltage-doubling unit share one switch tube, control is simplified, the power density of the converter is improved, higher voltage gain is achieved under the small duty ratio and turn ratio of coupled inductors, and the application range of the converter is enlarged.

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

The invention provides an isolated high-gain quasi-Z source DC-DC converter, including mainly the input DC voltage source, by the first inductor, first capacitance, first diode, a quasi-Z source network composed of a second inductor and a second capacitor, by the second diode, a quasi-switching boost unit composed of 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 conversion ratio of 1: n, a voltage doubling rectifier composed of a fourth capacitor, a fifth capacitor, afourth diode and a fifth diode, and a load resistance R (i) L ( / i). The whole circuit is simple, The input current of the power supply is continuous, which combines the single step-up and step-down voltage characteristics of the quasi-Z source impedance network and the quasi-switching boost network respectively, so that the output voltage gain is higher, and the electrical isolation between the output and input of the converter is realized by a high-frequency transformer, and the circuit does not have the start-up impulse current and the impulse current of the switching transistor at the turn-on time.

The invention provides a switch capacitor type quasi switch boosting DC-DC converter. The switch capacitor type quasi switch boosting DC-DC converter mainly comprises an input direct-current voltage source, a quasi switch boosting network, a switch capacitor network, a second MOS tube, a third diode, a fourth capacitor and a load resistor, wherein the quasi switch boosting network consists of a first inductor, a first capacitor, a first diode, a second diode and a first MOS tube; and the switch capacitor network consists of a second capacitor, a fourth diode, a third capacitor and a fifth diode. The whole circuit is simple in structure, current of a power supply is continuous, input and output are in common-ground, and the characteristic of single-stage boosting and reducing of the quasi switch boosting network and the characteristics of parallel charging and serial discharging of the switch capacitor are combined, so that the switch capacitor type quasi switch boosting DC-DC converter has high output voltage gain. A circuit does not have start impact current or impact current at the moment of switch-on of a switch tube.

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.

The invention discloses a wireless charging system for an electric car. The wireless charging system for the electric car comprises a wireless power supply device and a wireless powered device, wherein the wireless power supply device is arranged on the ground, and the wireless powered device is arranged on the electric car. The wireless power supply device includes a power supply module, a TS type resonant compensation network and an energy transmitting coil, wherein the energy transmitting coil is arranged on the ground, an input end of the power supply module is connected to a power grid, and the output end of the power supply module is connected with the energy transmitting coil through the TS type resonant compensation network. The wireless powered device comprises a charging battery,a rectification module and an energy pick-up coil for receiving energy transmitted wirelessly by the energy transmitting coil, wherein the output end of the energy pick-up coil is connected to the charging battery by the rectification module. An inner tube of the wireless charging system for the electric car effectively increases the output voltage gain and transmission power of the wireless charging system for the electric car.

The present invention discloses a high-gain direct current voltage converter with controllable output capacity. The converter comprises a voltage source, a first switch tube, a second switch tube, a first quasi-Z source module, a second quasi-Z source module and an output module, the first quasi-Z source module comprises a first capacitor, a second capacitor, a first inductor, a second inductor and a first diode, the second quasi-Z source module comprises a third capacitor, a fourth capacitor, a third inductor, a fourth inductor and a second diode, and the output module comprises a third diode, a fifth capacitor and a load. The high-gain direct current voltage converter with controllable output capacity employs two groups of quasi-Z source modules, has high output voltage gain, reduces the current pressures of the diodes and the switch tubes and improves the power capacity, and the capacitance stresses of the quasi-Z source modules are low so that the circuit does not have the starting impact problem.

The invention discloses a single-tube high-gain direct-current voltage enhancement conversion circuit with additional electric potential superposition output, and belongs to the technical field of an electric power conversion circuit. According to the circuit, conversion control is improved by high gain of a direct current voltage implemented by a single switching tube; in the switch-on and switch-off process of the switching tube, an auxiliary capacitor is charged by a parallel inductor to form additional electric potential; a pump lifting voltage, formed by a voltage boosting inductance element which is charged and then discharged in the circuit, is connected with the additional electric potential in a sequence polar serial connection manner to supply power for a load so as to improve the input direct current voltage; the charging of the voltage boosting inductance element and a parallel inductance element, the self-induction electric potential of a voltage boosting inductor and state conversion of the sequence polar series discharging of the capacitor voltage charged by the parallel inductor can be controlled by the single switching tube, so that output voltage gain which is much higher than that of a single-stage voltage boosting chopping wave conversion circuit can be obtained; and meanwhile, the circuit is simple in control modal state, and high in circuit power transferring efficiency.

The invention discloses a high-gain zero-ripple passive clamping type Boost converter and a control method thereof, and belongs to the technical field of power electronic converters. One end of Lin is connected with the positive electrode of a power supply Vin, and the other end is connected with one end of L1, the drain electrode of S2 and one end of C1; the other end of C1 is connected with the cathode of D1, one end of C0 and one end of a load resistor; the source electrode of S2 is connected with one end of L2 and one end of C3; the other end of L1 is connected with the drain electrode of S1, the anode of D1 and one end of C2; the other end of C2 is connected with the anode of D2 and the cathode of D4; the other end of the C3 is connected with the cathode of D2 and the anode of D3; the cathode of the power supply Vin is connected with the source electrode of the S1, the other end of the L2, the cathode of the diode D3 and one end of the C4; the other end of the C4 is connected with the anode of the diode D4, the other end of the C0 and the other end of the load resistor. On the basis of a traditional switch inductance converter, the converter overcomes the defects of large input current ripple and low voltage gain, and due to the introduction of the passive clamping circuit, the common problem of switch tube voltage resonance in a traditional switch inductance structure is suppressed.

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 hybrid T-type multi-level inverter device and its control method. In the inverter device: a capacitor string and a DC voltage source V dc Parallel connection; the center point of the capacitor string is connected to one end of the reverse series bridge arm I, and the other end of the reverse series bridge arm I is connected to the first connection end of the middle bridge arm, one end of the reverse series bridge arm II and one end of the reverse series bridge arm III , forming a T-shaped bridge arm; the reverse series bridge arm I, the reverse series bridge arm II, the reverse series bridge arm III, the intermediate bridge arm and the voltage dividing capacitor constitute a switched capacitor unit; the positive series bridge arm and the voltage dividing capacitor are connected in parallel; the forward series bridge arm The center point and the center point of the capacitor string serve as the AC voltage output end of the hybrid T-type multilevel inverter device. The invention effectively solves the technical problem of excessive voltage stress of the switch tube caused by the increase of the output voltage in the switched capacitor multi-level inverter, makes the invention suitable for high-voltage and high-power occasions, and expands the application range of the inverter.

The invention discloses a DC-DC converter topology construction method based on node separation and unit embedding, comprising the steps of: 1) Finding out the instantaneous peak when the working state occurs in the switched capacitor DC-DC converter in which the instantaneous peak current appears Loops with large currents; 2) Divide the branches in the loops with instantaneous peak currents into private branches and public branches, and divide the nodes in the loops with instantaneous peak currents into detachable nodes and inseparable nodes node; 3) Select the corresponding type of switching inductance unit with source according to the actual application, and based on the embedding method of node separation, after one or more unit embeddings, there is one and only one in each loop with instantaneous peak current Including the source switching inductance unit, a new DC-DC converter topology without instantaneous peak current is finally obtained. The invention can solve the problem of instantaneous high peak current in the switched capacitor DC-DC converter, and improve the output voltage gain of the switched capacitor DC-DC converter.

The invention discloses a high-gain DC voltage boost transformation circuit and belongs to the technical field of a power transformation circuit. The anode of E is connected with one end of L and one end of a BT primary winding; the cathode of E is connected with a switch tube emitter electrode, a low-potential end of Co and a low-potential end of R; the other end of L is connected with a switch tube collector electrode, the other end of the BT primary winding and the anode of D5; the cathode of D5 is connected with a low-potential end of a capacitor C1 and a negative end of a rectifier DW; a high-potential end of C1 is connected with a high-potential end of Co, a high-potential end of R and a positive end of the DW; and the two ends of a BT secondary winding are connected with two AC input ends of DW. According to the invention, pump voltages of an inductance element are connected in series with capacitance voltages charged by a rectified high-frequency transformer secondary winding excited by AC voltages at the two sides of the inductor according to polarity for supplying power to a load, input AC voltages are boosted, boost transformation control of the DC voltages is implemented, and obtained output voltage gains are much more than that of a single-stage boost chopper transformation circuit.

The present invention provides a switched inductance hybrid quasi-Z source inverter circuit, including a voltage source, which is composed of a first inductance, a second inductance, a fourth diode, a fifth diode and a sixth diode Switching inductance unit, a switching boost unit composed of a first capacitor, a first diode, a second diode and a MOS transistor S, composed of a third inductance, a second capacitor, a third capacitor and a third diode The quasi-Z source unit, three-phase inverter bridge, output filter inductor, filter capacitor and load. The whole circuit combines the single-stage buck-boost characteristics of the switching boost unit and the quasi-Z source unit and the characteristics of parallel charging and series discharging of the switching inductor, which has a higher output voltage gain, and the output and input share the same ground, reducing the inverter The voltage stress of the switching devices in the bridge, and the circuit does not have the inrush current at startup and the inrush current at the moment when the switch tube is turned on.

The present invention provides a switched inductance type quasi-switch boost DC-DC converter circuit, comprising a voltage source consisting of a first inductance, a second inductance, a fourth diode, a fifth diode and a sixth diode The switch inductance unit constituted, the two-terminal quasi-switch boost unit composed of the first capacitor, the first diode, the first MOS transistor, the third diode and the switch inductance unit, the second MOS transistor, the second capacitor, second diode, output diode, output filter capacitor and load. The structure of the whole circuit is simple, and the expansion of the output voltage gain is realized by combining the single-stage boosting characteristics of the quasi-switching boost unit, the switched capacitor unit and the switched inductor unit.

The invention relates to a straight-through SVPWM modulation control method based on an active quasi-Z-source inverter. According to the method, a single adjustment period of an active quasi-Z-sourceinverter comprises four straight-through vectors with equal time lengths and 000, 100 and 110 vectors which are symmetrically arranged relative to the middle portion of the adjustment period, whereinthe middle section of the adjustment period is a 111 vector, the straight-through vectors are located at the alternating part of the zero vector and the non-zero vector, the conduction pulse of a switching device in an impedance network where the active quasi-Z-source inverter is located is arranged between the adjacent straight-through vectors, the conduction pulse is provided with a corresponding conduction coefficient, and the width of the conduction pulse is calculated according to the conduction coefficient. Compared with the prior art, the method of the invention has the advantages of small shoot-through duty ratio, high voltage gain, reduced switching frequency of the impedance network and the like.

The invention discloses a double-pipe Z-source direct-current voltage converter. The converter comprises a voltage source, an inductor, a capacitor, a first switch tube, a second switch tube, a first diode, a second diode and a load. The positive electrode of the voltage source is connected with one end of the inductor, and the negative electrode is connected with the source electrode of the first switch tube and the cathode of the first diode. The drain electrode of the first switch tube is connected with the cathode of the second diode, the positive electrode of the capacitor and one end of the load. The drain electrode of the second switch tube is connected with the anode of the first diode, the negative electrode of the capacitor and the other end of the load. The converter is simple in structure and convenient to control, input current is continuous, quite high output voltage gain under the low duty ratio can be achieved and the circuit is free from a start impacting problem.