289results about How to "High voltage gain" patented technology

A bidirectional converter circuit includes a voltage source which provides an input voltage, an energy storage set connected to the voltage source and receives the input voltage, a switch set connected to the energy storage set, wherein the switch set includes a first switch and a second switch; an operating switch set connected to the switch set, wherein the operating switch set includes a first operating switch, a second operating switch, a third operating switch and a fourth operating switch. The bidirectional converter further includes a blocking capacitor set and a (input / output) capacitor set. Wherein, the blocking capacitor set is connected to the switch set and the operating switch set. The first operating switch and the second operating switch are driven complementarily with the first switch, and the third operating switch and the fourth operating switch are driven complementarily with the second switch.

The invention discloses a single switching tube high-grain converter based on a coupling inductance voltage-multiplying unit. The first end of a coupling inductance primary winding is connected with an anode of an input power supply and the first end of a voltage-multiplying capacitor; the first end of a coupling inductance secondary winding is connected with the second end of the voltage-multiplying capacitor; the second end of the coupling inductance primary winding is connected with a drain electrode of a switching tube, an anode of a first follow current diode and the first end of a switching capacitor; the second end of a coupling inductance secondary winding is connected with a cathode of the first follow current diode and an anode of a second follow current diode; an anode of the output diode is connected with a cathode of the second follow current diode and the second end of the switching capacitor; the cathode of the output diode is respectively connected with the first end of the output capacitor and the first end of an output load; and the first end of the coupling inductance primary winding and the second end of the coupling inductance secondary winding are dotted terminals. According to the single switching tube high-grain converter disclosed by the invention, the turn-off voltage peak is inhibited; leakage inductance is recovered; and the grain of energy voltage is high.

The present invention discloses a low noise amplifier circuit adopting multiplex noise counteract, wherein the low noise amplifier includes a DC connected Balanced to Unbalanced transformer (Balun), a pair of cross coupling connected input transistor with source electrode respectively direct connected to two balancing ends of the Balanced to Unbalanced transformer and the grid respectively AC coupled connected to two balancing ends that different with Balanced to Unbalanced transformer; a pair of transistor load with the grid respectively AC coupled connected to two balancing ends of the Balanced to Unbalanced transformer, and two pairs of electric resistance-capacitance (R-C) high-pass filter network forms cross coupling configuration by connecting the input transistor, two pairs of electric resistance-capacitance high-pass filter network AC couples the input signal to grid of the transistor load tube. The main purpose of the present invention is to realize low noise coefficient and high linearity through multiplex noise counteract technology only consuming low power consumption at the same time.

The invention discloses a boost type staggered parallel converter for realizing passive clamping by combining a coupled inductor and a switch capacitance. The boost type staggered parallel converter comprises two power switch pipes, two clamping diodes, two clamping capacitors, two free wheeling diodes, two switched capacitors, two output diodes, an output capacitor and two coupled inductors, wherein the two coupled inductors have three windings respectively. The leakage inductance of the two coupled inductors is used for realizing the zero-current turning-on of the power switch pipes, the passive clamping circuit consisting of the clamping diodes and the clamping capacitor is used for realizing the soft turning-off of the power switch pipes and the lossless transfer of the leakage inductance power, the clamping diodes have no series connection with a power loop, thus reducing the conductive loss, the second winding and the third winding of the two coupled inductors are used for realizing high gain output of the convertor, the two switch capacitors are used for further raising the voltage gain of the convertor and reducing the voltage stress of the power devices, and no extra power switches and conductive components are needed. The circuit has no energy consumption components but simple structure.

A boost-forward-flyback convertor has a boost converting circuit, a forward converting circuit, a flyback converting circuit and a transformer. The boost converting circuit, the forward converting circuit and the flyback converting circuit are coupled by using elements of the boost and forward converting circuits to form the transformer. The boost-forward-flyback convertor combines benefits of conventional boost, forward and flyback convertors, specifically combines active clamping and lower power pressure to the element from the boost convertor, increases gain ratio by using the forward convertor and provides output to the load during a switch OFF-state from the combination of the flyback and boost converting circuit. The boost-forward-flyback convertor combines benefits of conventional boost, forward and flyback convertors and not only has very high gain, high converting efficiency and lower power loading for devices, but also is simple, cost less, easy to use and has a small volume.

The invention discloses a zero-input current ripple high-gain converter based on double coupling inductors and a single switch. The converter includes a direct current input power supply Vin, coupling inductors T1 and T2, freewheel diodes D1, D2 and D4, an energy storage capacitor C1, a power switch tube Q, a clamping diode D3, voltage-multiplying energy storage capacitors C2, C3 and C4, an output diode D0 and an output capacitor C0. The converter can obtain a high gain of voltage by means of the coupling inductors, the gain is controlled by a duty ratio and a coupling inductance turn ratio and is wide in adjustable range, and voltage and current stress of the switch tube is small; through coupling of an input inductor and an energy storage inductor, and reasonable configuration of a coupling coefficient, input current zero ripples can be realized; a lossless absorption circuit formed by the clamping diode and the energy storage capacitor can reduce voltage spikes of the switch tube; and the freewheel diodes, the voltage-multiplying energy storage capacitors and secondary sides of the coupling inductors form an energy recovery circuit, so that leakage inductance energy is finally fed back to a load side, thereby improving the efficiency of the converter.

The invention relates to a low-temperature drift detuning self-calibration operational amplifier circuit and a design method of the low-temperature drift detuning self-calibration operational amplifier circuit. The low-temperature drift detuning self-calibration operational amplifier circuit comprises two gain units, a biased module, three capacitors, a current source, six switches, four P-type metal oxide semiconductor (MOS) pipes and five N-type MOS pipes, wherein each gain unit comprises a capacitor, two resistors, a switch, ten P-type MOS pipes and four N-type MOS pipes. A folded cascade structure is adopted to be used as a gain stage of an amplifier so that high voltage gain and a high power supply rejection ratio can be obtained. Due to the fact that the MOS capacitor is adopted to store, operate and amplify detuning information caused by technology variation, and the detuning information is successively and automatically calibrated when a closed loop is used, low direct current detuning is achieved. A lower temperature coefficient is achieved by adoption of a temperature compensation technology. A high drive capability is obtained by adoption of push-pull output of an AB class.

The invention discloses a booster type non-isolated three-port DC converter and a control method thereof, and belongs to the technical field of power electronic converters. The booster type non-isolated three-port DC converter is composed of two switching tubes, a two-way switch, two diodes, a high-frequency filter inductor, a coupling inductor containing two windings, four capacitors, two DC sources and a load. According to the invention, two-way power transmission between the two DC sources is controlled through adjusting the duty ratio of the two switching tubes, and the power, which is transmitted to the load by the two DC sources, is controlled through adjusting the duty ratio of the two-way switch. Power transmission and control between the two DC sources and the load are realized simultaneously only through one converter, and functions of a plurality of single-input-single-output converters are realized. In addition, the booster type non-isolated three-port DC converter can also realize soft switching of the switching tubes, the two-way switching tube and the diodes, and can effectively reduce the switching loss and improve the efficiency.

The invention relates to a high-gain three-winding cascade boost converter and belongs to the field of power electronic converters. The problem that a conventional boost converter circuit cannot achieve high gain easily is solved. The converter comprises a direct-current voltage source, a preceding stage BOOST circuit, a rear stage three-winding coupling inductor BOOST circuit and a clamping-booster circuit. The preceding stage BOOST circuit is composed of a first diode D1, a second diode D2, an input inductor Lin and a first output capacitor C1. The rear stage three-winding coupling inductor BOOST circuit is composed of a first coupling inductor N1, a second coupling inductor N2, a third coupling inductor N3, a power switch tube S, a rectifier diode Do and a second output capacitor Co. The clamping-booster circuit is composed of a clamping diode D3, a booster diode D4, a clamping capacitor Cc and a boost capacitor C2. When the turn ratio of a coupling inductive winding is smaller, the voltage gain is higher. Due to the cascade characteristics, the high voltage gain can be achieved through small duty cycle, and the voltage stress of the power switch tube is small. The high-gain three-winding cascade boost converter is mostly applied to a distributed power supply system.

The invention provides a single-phase high-gain boost converter. The single-phase high-gain boost converter mainly comprises a voltage transfer circuit, a coupling inductance booster circuit and an output circuit, wherein the voltage transfer circuit, the coupling inductance booster circuit and the output circuit are connected in sequence. The voltage transfer circuit comprises a first inductor, a switching tube and a first capacitor. The coupling inductance booster circuit comprises a primary winding and a secondary winding which are coupled with the inductor, a second capacitor, a third capacitor, a first diode and a second diode. The output circuit comprises a third diode, a fourth capacitor and a load. The single-phase high-gain boost converter is simple in structure and high in output voltage gain.

A Sallen-Key filter requires an operational amplifier with a large input impedance and a small output impedance to meet the external filter characteristics. The operational amplifier requires an internal feedback path for stability that limits performance. This invention eliminates the need for internal feedback and increases the gain of a source follower which has characteristics matching the operational amplifier in the Sallen-Key filter. The source follower provides 6 dB of AC voltage gain and is substituted for the operational amplifier in the Sallen-Key filter. The Sallen-Key filter requires a differential configuration to generate all the required signals with their compliments and uses these signals in a feed forward path. Furthermore, since the source follower uses only two n-channel stacked devices, the headroom voltage is maximized to several hundred millivolts for a 1.2V voltage supply in a 40 nm CMOS technology. Thus, the required 880 MHz bandwidth of the Sallen-Key filter can be easily met using the innovative source follower.

The invention relates to a voltage-multiplying DC converter based on a charge pump capacitor. The voltage-multiplying DC converter comprises an input power supply, a main switch loop, a freewheel diode, an output capacitor and a load, wherein the input power supply is connected with the input end of the main switch loop; and the freewheel diode is connected with the output end of the main switch loop after serially connecting the output capacitor. The main switch loop includes an input diode, a first inductor, a second inductor, a charge pump capacitor, a first main switch and a second switch, wherein one end of the first main switch is respectively connected with the negative electrode of the input power supply and the output capacitor, and the other end is respectively connected with the first inductor, the charge pump capacitor and the second main switch; the first inductor is respectively connected with the positive electrode of the input power supply and the anode of the input diode; the charge pump capacitor is respectively connected with the cathode of the input diode and the second inductor; and the second main switch is respectively connected with the second inductor and the freewheel diode. In comparison with the prior art, the voltage-multiplying DC converter provided by the invention has the advantages of improved voltage gain, less conduction loss, low cost, simple circuit structure and so on.

The invention belongs to the technical field of electrics and relates to a single-tube double-ended inversion isolated DC-DC boost converter. On the basis of a common single-ended flyback circuit topology, a resonant capacitor is connected in parallel with the primary side of a transformer, a high-frequency voltage-doubling rectifier circuit is connected in cascade with the secondary side of the transformer, the resonant capacitor in a parallel branch and a coil inductor in the primary side of transformer resonate so that an original converter is changed to two-way excitation, thereby improving magnetic core utilization rate, and improving output-to-input gain of an isolation converter; the high-frequency voltage-doubling rectifier circuit connected in cascade with the secondary side of the transformer enables the asymmetrical voltage output by the coil of the secondary side of the transformer to be effectively used so that the overall efficiency of the converter to is further improved.

The invention relates to a topological structure of a two-way DC / DC converter and a converter. The topological structure comprises an input end, an output end, inductors L1 and L2, coupling inductors LP, LO and LS, diodes D1, D2, D3 and D3X, field effect transistors S1, S2, S3 and S4 and capacitors C1 and C2, wherein one end of the L2 and the homonymous end of the LP are connected with the anode of the input end, the other end of the L2 is connected with the cathode of the D2 and the source electrode of the S2, the heteronymous end of the LP is connected with the homonymous end of the LO, the anode of the D1 and the drain electrode of the S1, the heteronymous end of the LO is connected with the homonymous end of the LS and the drain electrode of the S4, the heteronymous end of the LS is connected with one end of the C2, the other end of the C2 is connected with the drain electrode of the S2, the cathode of the D3 and the source electrode of the S3, the cathode of the D1 is connected with one end of the C1 and one end of the L1, the other end of the L1 is connected with the anode of the D3 and the cathode of the D3X, the anode of the D3X, the other end of the C1, the source electrode of the S1, the source electrode of the S4 and the anode of the D2 are connected with the cathode of the input end, the drain electrode of the S3 is connected with the anode of the output end, and the cathode of the output end is connected with the anode of the D3X. At a BOOST state, the invention has higher gain, the capacitor has higher energy storage density, and the system has strong reliability.

The invention relates to the independent photovoltaic power generation technology, and simultaneously realizes the functions of large-scale boosting, three-port grounding and storage battery charging.Furthermore, the invention provides a control strategy corresponding to a converter, wherein a TPC can be safely and reliably applied to an independent photovoltaic power generation system. Accordingto the technical scheme adopted by the invention, a three-port converter system applied to an independent photovoltaic power generation occasion comprises three parts: a buck-boost bidirectional DC converter, a boost DC converter and a switch capacitor unit. In the buck-boost bidirectional DC converter, a Vpv and an ipv serve as the port voltage and the port current of a photovoltaic array respectively. The output of the photovoltaic array is applied to the parallel voltage-stabilized capacitor Cpv of the photovoltaic array as the input of the three-port converter. S1 and S2 are switching tubes which are connected in series. The system is is mainly applied to independent photovoltaic power generation occasions.

Disclosed herein is an apparatus for receiving a wide-band pulse signal in a communication channel using a human body. When a weak wide-band pulse signal, which is output from a communication channel using a human body as a data transmission medium, is restored to a digital signal, it is possible to accomplish low power consumption and high data transmission rate using a wide-band symmetrical triggering technology using 50-Ω impedance matching, wide-band amplification and symmetrical threshold voltages. In addition, since only a single signal electrode is used, it is possible to provide an apparatus having usability, wearability and miniaturization. In addition, it is possible to remove necessities of an external reference voltage to reduce area consumption and to simply adjust a feedback resistor to easily adjust the reception sensitivity according to a communication distance.

The invention discloses a high-gain boost converter based on a coupling inductance and voltage transfer technology. The high-gain boost converter comprises an asymmetric interleaving Boost circuit, a voltage transferring unit circuit, a voltage multiplying unit circuit and an output unit circuit, wherein the asymmetric interleaving Boost circuit, the voltage transferring unit circuit, the voltage multiplying unit circuit and the output unit circuit are sequentially connected with one another. The asymmetric interleaving Boost circuit comprises a first switching tube, a second switching tube, a first diode, a primary winding of a first coupling inductor and a primary winding of a second coupling inductor. The voltage transferring unit circuit comprises a first capacitor, a fourth capacitor and a second diode. The voltage multiplying unit circuit comprises an auxiliary winding of the first coupling inductor, an auxiliary winding of the second coupling inductor, a second capacitor and a third diode. The output unit circuit comprises a fourth diode, a third capacitor and a load. According to the high-gain boost converter based on the coupling inductance and voltage transfer technology, the switching losses produced when the converter works are reduced, and the improvement of the power level of the converter is facilitated.

A voltage boosting circuit includes a first inductor, a first switch, a second inductor, a second switch, a first clamping diode, and a first energy storing element. When the first switch and the second switch conduct, the first and second inductors are able to store energy of a power source signal. When the first switch is not conducting and the second switch conducts, the first inductor is able to release energy to the first energy storing element. When the first switch conducts and the second switch is not conducting, the second inductor and the first energy storing element are able to release energy to a load.

The invention discloses a high-frequency boosting isolation inverter, which comprises a high-frequency boosting inverting circuit and an AC-AC (alternating current-alternating current) conversion circuit. The high-frequency boosting inverting circuit is mainly used for outputting the single-phase AC voltage, and realizing the low ripple of input current by controlling the phase of the main switch tube via a staggered parallel connecting structure. Meanwhile, the high-frequency boosting inverting circuit adopts an active clamp structure to realize soft opening and closing of the main switch tube, so the consumption is reduced and the efficiency is improved. In addition, the high-frequency boosting inverting circuit adopts two coupled induction type serial connecting structures at the load side to realize higher boosting capability. The single-phase AC voltage is converted into the three-phase AC current by the AC-AC conversion circuit, and the energy transmission process is divided into a capacitance side charging part and a capacitance side discharging part for the output end. Therefore, the isolation inverter can obtain higher voltage gain and lower input current ripple, and the conversion efficiency and the reliability are high.

The invention provides a multilevel inverter based on a bridge modular switched capacitor. The multilevel inverter comprises a bridge modular multilevel switched capacitor module and an inverting module. During running of a system, the bridge modular multilevel switched capacitor module performs a conversion process of output voltage U, 2U, 4U and U through DC-DC conversion and performs DC-AC conversion through the inverting module. The multilevel inverter allows DC-DC conversion to be performed under high efficiency, high power density and high-voltage conversion ratio, a unipolar multi-frequency SPWM (sinusoidal PWM) method in the DC-AC conversion is optimized, the number of switch tubes is less than that of the traditional multilevel inverter module, and high-quality output waveform and low-harmonic content are achieved.

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.

A self-strong excitation bidirectional high-voltage gain interleaved switch reluctance motor power converter system comprises a main circuit, an excitation power supply and a bidirectional DC-AC-DC, wherein the main circuit, the excitation power supply and the bidirectional DC-AC-DC are mutually connected. The main circuit is simple in structure, and each phase winding is divided into two branchesconnected in parallel, so that the effect of enhanced excitation is achieved. The storage battery of the excitation power supply has an automatic charging function, and the bidirectional DC-AC-DC ensures that the switched reluctance motor can generate power when operating clockwise and electrically operates in counterclockwise direction. The functions of isolation, high-frequency transformation and high voltage gain is provided. The interleaved control mode during electric operation in counterclockwise direction can reduce the torque pulse. The system is more suitable for power generation / electric operation in different time period.

The invention discloses a multi-unit diode capacitor network and coupling inductor high-gain DC converter. The main circuit topology fully combines the characteristics of a multi-winding coupling inductor and a diode capacitor boost network, and the converter has the following remarkable advantages: 1), improving the voltage gain, and reducing the voltage stress of a power device; 2), achieving zero output voltage ripple, and remarkably reducing the demands of an LC filter; 3), reducing the turn ratio of a coupling resistor, reducing the size of a magnetic element, and improving the power density; 4), inhibiting the turn-off voltage peak of a switching tube, reducing the switching loss, and improving the electric energy conversion efficiency; 5), achieving the modular design of a basic boost unit, and achieving high flexibility. The converter is good in application prospect in a new energy distributed power generation system.

The invention discloses a wide-range input type boost-buck three-level DC converter for photovoltaic power generation. The wide-range input type boost-buck three-level DC converter comprises a three-level Buck DC converter, wherein the post stage of the three-level Buck DC converter is connected in parallel with a quasi-Z-source liquid crystal display (LCD) three-end impedance network, the quasi-Z-source LCD three-end impedance network comprises a first inductor, a second inductor, a first energy storage capacitor, a second energy storage capacitor and a first diode, and the post stage of the quasi-Z-source LCD three-end impedance network is connected in parallel with a three-level Boost DC converter. In the wide-range input type boost-buck three-level DC converter, the quasi-Z-source LCD three-end impedance network is utilized, the front stage of the quasi-Z-source LCD three-end impedance network is connected in parallel with the traditional three-level Buck DC converter and the post stage of the quasi-Z-source LCD three-end impedance network is connected in parallel with the traditional three-level Boost DC converter to form a wide-gain three-level Buck-Boost DC converter topology, the Boost capability of the topology is improved, and the voltage stress borne by an original power device is reduced by half.

The invention provides a current continuous type high-gain DC-DC converter circuit. The current continuous type high-gain DC-DC converter circuit comprises a voltage source, a first inductor, a first diode, a first capacitor, a two-end impedance network, a third diode, an MOS transistor, a fourth inductor, an output capacitor and a load, wherein the two-end impedance network is composed of a second inductor, a third inductor, a second capacitor, a third capacitor and a second diode. The voltage source, the first inductor, the third diode and the MOS transistor are sequentially connected in series to form a first level booster circuit, the first capacitor, the two-end impedance network and the MOS transistor are sequentially connected in series to form a second level booster circuit, and the fourth inductor, the output capacitor and the load form an output circuit. The whole circuit is simple in structure, only one MOS transistor is adopted, high output voltage gains are possessed, power currents are continuous, load currents are continuous, input and output are both grounded, voltage stress of the capacitors in the two-end impedance network is low, and starting impulse currents and impulse currents generated at the moment the MOS transistor is switched on do not exist in the circuit.

The invention discloses a resonance boost DC / DC converter and a control method thereof suitable for high-voltage and high-power occasions. The converter is connected with a direct-current input power source and a load and comprises two primary-side diodes, a first switching tube, a second switching tube, a third switching tube, a fourth switching tube, a resonance unit, a first rectifier diode, a second rectifier diode and two filter capacitors. The resonance boost DC / DC converter is characterized in that the resonance unit is connected with a bridge arm composed of the four switching tubes and a rectifier unit composed of the two rectifier diodes and the two filter capacitors. According to the resonance boost DC / DC converter and the control method thereof, approximate zero voltage switching-off of the switching tubes and zero current switching-off of the rectifier diodes can be achieved, losses can be greatly reduced, and meanwhile the voltage stress of all switching devices is not larger than one second of the output voltage. A resonance circuit can be used for the high-power boost occasions.

The invention discloses a coupled inductor-type three-level Zeta converter, which relates to the technical field of power electronics converters and aims at solving the problem that as voltage gain is limited by the value of a duty ratio, a voltage conversion ratio of the circuit depends too much on selection of the switch duty cycle. Primary ends of the coupled inductors in the circuit are connected in parallel with a power supply when two main switch transistors are conducted, the power supply charges the coupled inductors, n times of voltage are generated at the secondary ends of the coupled inductors correspondingly, voltage at two ends of bootstrap capacitors is enhanced to n+1 times of power voltage. When one of the two main switch transistors is cut off, the primary ends and the secondary ends of the two coupled inductors are serially connected together in the circuit for discharging. According to a volt-second balance circuit effect principle, the circuit can realize high voltage gain. As the circuit introduces a turn ratio of the coupled inductor, dependence on the duty cycle value by the voltage gain is fully reduced. The coupled inductor-type three-level Zeta converter can be used for changing the topological structure of a DC converter main circuit.

The invention relates to an inductor built-in boost unit converter, belonging to the technical field of power electronic converters. The inductor built-in boost unit converter comprises an inductor built-in boost unit, a direct-current voltage source, a power switch tube, an output power diode and a filter capacitor, wherein the inductor built-in boost unit comprises a coupling inductor, an energystorage capacitor and a freewheel diode. By the invention, the voltage gain can be increased to a relatively high level, the defect that a conventional Boost circuit is insufficient in boost capacityis overcome, and the inductor built-in boost unit converter has the advantages of high gain, simple structure and high conversion efficiency. Compared with an existing coupling inductor boost circuit, it is unnecessary to add extra leakage inductance energy absorption and switch tube clamping circuits, the inductor built-in boost unit converter has the simplest circuit structure and the minimum components, and the conversion efficiency and the reliability are higher.

A single-tap-inductor Z-source inverter belongs to the technical field of an inverter. The single-tap-inductor Z-source inverter settles the problems of relatively low voltage boosting capability caused by short direct conduction time, high device voltage stress, no common-ground, and resonance current in starting in an existing Z-source inverter. A single-tap-inductor Z-source network comprises a capacitor C, an tap inductor L, diodes (D1,D2,D3) and an insulated gate bipolar transistor. The anode output end of a DC power supply is connected with the anode end of the tap inductor L. The middle tap of the tap inductor L is connected with the anode of diode D1. The cathode end of the tap inductor L is connected with the anode of the diode D3. The cathode of the diode D1 is connected with the anode input end of a three-phase inverter, the cathode of the diode D3, the anode of the diode D2 and the emitter electrode of the insulated gate bipolar transistor. The collector electrode of the insulated gate bipolar transistor is connected with the cathode of the diode D2 and one end of the capacitor C. The other end of the capacitor C is connected with the cathode input end of the DC power supply and the cathode input end of the three-phase inverter. The single-tap-inductor Z-source inverter is used for an AC power supply.