39results about How to "Realize the boost function" patented technology

The invention discloses a single-stage booster inverter non-isolated grid-connected photovoltaic power generation system. A coupled inductor passive network is introduced to couple the main circuit of the inverter with a power source, the booster function is realized through primary transformation, and at the same time, a fourth diode is added, the electrical connection between the effective vector and the photovoltaic cell end and the power grid side in the traditional zero vector state can be disconnected, so the common mode voltage generation current circuit in the state can be blocked. The invention further discloses a single-stage booster inverter non-isolated grid-connected photovoltaic power generation system control method, in the control method, the adjacent effective vector synthesis pulse width modulation and direct connection control mode is adopted, and the traditional zero vector does not adopted, so the common mode voltage when the traditional zero vector is switched to other states can be eliminated, and the common mode voltage amplitude of the effective vector can be reduced.

The invention discloses a low-voltage intelligent voltage-regulating and voltage-stabilizing system. The low-voltage intelligent voltage-regulating and voltage-stabilizing system comprises a single-phase intelligent voltage regulator. The low-voltage intelligent voltage-regulating and voltage-stabilizing system is characterized in that the single-phase intelligent voltage regulator comprises an intelligent control switching unit, a power capacitor and a single-tap isolation transformer, the intelligent control switching unit comprises a main control MCU, a single phase alternating current voltage and current acquisition module, a switch action unit and a wireless communication module; the single phase alternating current voltage and current acquisition module, the wireless communication module, a power module and the switch action unit are respectively connected with the main control MCU; the switch action unit is formed by assembling one single-pole double-throw interlocking alternating current contactor, one single-pole single-throw common type alternating current contactor, relays and spare relays, and each relay is connected with one spare relay in series and then is connected with one single-pole double-throw interlocking alternating current contactor and one single-pole single-throw common type alternating current contactor in parallel; and the wireless communication module comprises a GPRS wireless communication module and a WIFI wireless communication module. The low-voltage intelligent voltage-regulating and voltage-stabilizing system can realize automatic holding of stable output voltage of a user side.

The invention discloses a bridgeless three-rectifier boost power supply circuit, includes three rectifying circuits, two Boost capacitors, energy storage capacitors, two Boost conversion circuits andfeedback control driving unit. The three rectifying circuits rectify and charge the energy storage capacitors, and charge the two Boost capacitors respectively when the input voltage is positive and negative. When the input voltage is positive or negative, the double Boost converter alternately charges the storage capacitor by superposing the voltage on the Boost inductor and the Boost capacitor,thus realizing the Boost boost conversion function. In the three-rectifier circuit, only one diode is used to charge the Boost capacitor, so the effect of bridge-less PFC is achieved. Rationally arrange the connection position of the input surge suppression circuit so that it has zero loss. As the invention follows the input structure of the traditional BoostPFC, the invention has better EMI effect than the traditional bridgeless PFC circuit.

Embodiments of the invention disclose a driving circuit and a driving method thereof, a micro-fluidic substrate and a micro-fluidic device. The driving circuit is characterized in that: a first voltage signal of a first voltage signal end is transmitted to a first end of a first capacitor through a voltage write-in unit, and a reset signal of a reset signal end is transmitted to a second end of the first capacitor through a reset unit, so that a voltage difference is generated between the first end of the first capacitor and the second end of the first capacitor; then a second voltage signal of a second voltage signal end is transmitted to the second end of the first capacitor by a switching unit through a boosting unit; in this way, when a high potential signal needs to be output, as a potential signal of the second end of the first capacitor is increased, a potential signal of the first end of the first capacitor is higher than a potential signal of the first voltage signal of the first voltage signal end.

The invention relates to a through physical separation-type Z-source inverter with high booster multiple, which relates to the field of Z-source inverters, and comprises a direct current voltage source, a first blocking diode, a second blocking diode, a Z-source impedance network and a three-phase inverter bridge; and the Z-source impedance network comprises a first inductor, a second inductor, a first capacitor and a second capacitor which form an X-shaped structure. The inverter is characterized by also comprising a full-control switch device, a large capacitor and a power diode; the negative pole of the second capacitor and the collector of the full-control switch device are parallelly connected to the anode of the power diode; the emitter of the full-control switch device is connected with the negative pole of a direct current power supply; the cathode of the power diode is connected with the positive input end of the three-phase inverter bridge; the large capacitor is parallelly connected with the three-phase inverter bridge; and the positive pole and the negative pole of the capacitors are respectively connected with the positive input end and the negative input end of the three-phase inverter bridge correspondingly. According to the through physical separation-type Z-source inverter with high booster multiple, no coupling relationship exists between a booster factor and an inverter factor, the through duty ratio is independently controlled, and the booster multiple which can be realized is high.

The invention provides a charging circuit, a control method of the charging circuit and an electric vehicle, and relates to the technical field of electric vehicles, the charging circuit comprises a first switch, a driving motor and a driving motor control unit; one end of the first switch is connected with a DC charging port, and the other end is connected with a third winding of the driving motor; direct current input from the direct current charging port flows to the third winding through the closed first switch; direct current flowing into the third winding flows to the first winding and the second winding of the driving motor; direct current flowing into the first winding and the second winding is boosted by a boosted circuit formed by the first winding, the second winding and the driving motor control unit and then flows to a power battery. High-power parts in the electric vehicle are greatly reduced, the number of components in the whole charging circuit is small, the circuit line is simple, the space occupancy rate is greatly reduced, and meanwhile the cost of the electric vehicle is well reduced.

The invention relates to the field of a modularized electric cabinet and especially relates to a chassis bracket device for a cabinet. The chassis bracket device for the cabinet comprises a bracket and a locker assembled on a front part of the bracket, wherein the locker comprises a lock rod and a lock cap; a locking opening is formed in the front end of the lock cap; a thread sleeve is threaded on the lock rod; a force-limiting spring, a pressing slice, a driving slice, a rotary cap and an output sleeve are also arranged on the thread sleeve; a stopping wall is arranged between the two ends of the rotary cap; a mounting hole is formed in the stopping wall; a driving steel ball is arranged in the mounting hole; the pressing slice and the driving slice are respectively arranged on the two sides of the stopping wall; the driving slice and the thread sleeve are in rotation-stopping fit with each other; a ball slot corresponding to the steel ball is formed in the driving slice; the force-limiting spring is jacked between one side of the pressing slice away from the steel ball and the thread sleeve; a locking hook pushing pressing structure which is matched with a locking hook on the corresponding chassis and is used for pushing the chassis is arranged on the output sleeve; a transmitting structure which is used for driving the output sleeve to move forward is arranged on the thread sleeve. The chassis bracket device is used for solving the problem of poor boosting capacity and incapacity of limiting force through boosting of the present chassis bracket device for the cabinet.

The invention relates to the field of modularized electrical cabinet, and in particular relates to a torque-limiting boosting locker for a case. The boosting locker includes a lock rod and a lock cap, wherein a lock opening matched with a lock hook on the caser is arranged at the front end of the lock cap; a thread sleeve is assembled on the lock rod in a threaded manner; a force-limiting spring, a press plate, a transmission plate, a rotary turncap and an output sleeve are also assembled on the thread sleeve; a baffle wall is arranged between two ends of the turncap, and provided with a installing through hole in which a transmission steel ball is assembled; the press plate and the transmission plate are respectively arranged on two sides of the baffle wall; the transmission plate is matched with the thread sleeve and provided with a ball groove corresponding to the steel ball; the force-limiting spring is propped between one side, away from the steel ball, of the press plate and the thread sleeve; the output sleeve is provided with a lock hook push-press structure matched with the lock hook on the corresponding case for pushing the case; the thread sleeve is provided with a transmission structure for driving the output sleeve to move forwards. The torque-limiting boosting locker overcomes the problems that the existing locker is poor in boosting capability, and cannot limit force in boosting.

The invention discloses a control circuit of a remote controller with a backlight screen. The control circuit comprises a key circuit, a code sending circuit, a power supply booster circuit, a backlight switch circuit, an MCU (Microprogrammed Control Unit) control circuit and an MCU power supply circuit, wherein the power supply booster circuit is used for boosting power supply voltage and supplying power to a backlight; the backlight switch circuit is used for controlling the on and off of the backlight; the MCU control circuit is used for receiving or outputting a signal to control the circuits and driving an LCD (Liquid Crystal Display); the key circuit and the code sending circuit are connected with the MCU; the input end of the booster circuit is connected with a power supply; the output end of the booster circuit is connected with the backlight; the control end of the backlight switch circuit is connected with the MCU; the input end of the MCU power supply circuit is connected with the power supply; the output end of the MCU power supply circuit is connected with the MCU. The control circuit is characterized in that the booster circuit is also connected with the MCU; output voltage of the booster circuit is controlled by a PWM (Pulse-Width Modulation) signal outputted by the MCU. The invention provides the control circuit of the remote controller with the backlight screen. The booster circuit is used to replace a DC (Direct Current) / DC booster power supply chip, the problem of automatic reset of the remote controller is solved, and the service life of a battery is longer.

The invention discloses a control method and device of a power converter, and a storage medium, and the method comprises the steps: determining a target duty ratio of a second upper bridge arm switching tube when the input voltage of a voltage input unit is greater than the output voltage of a voltage output unit, according to the target duty ratio, the conduction duration of the first upper bridge arm switch tube is controlled so as to adjust the duty ratio of the first upper bridge arm switch tube, the duty ratio of the first lower bridge arm switch tube is complementary with the duty ratio of the first upper bridge arm switch tube, and the duty ratio of the second lower bridge arm switch tube is complementary with the duty ratio of the second upper bridge arm switch tube; when the input voltage of the voltage input unit is equal to the output voltage of the voltage output unit, the duty ratio of the first upper bridge arm switch tube is fixed, and the conduction duration of the second lower bridge arm switch tube is controlled until the input voltage is smaller than the output voltage and the output voltage is not increased any more. According to the invention, seamless switching of the four-switch DC / DC power converter can be realized conveniently and efficiently, and switching loss is reduced.

The invention discloses a low-voltage intelligent voltage adjusting and stabilizing system with a handheld terminal. The low-voltage intelligent voltage adjusting and stabilizing system comprises an intelligent single-phase voltage adjustor and the android system handheld terminal and is characterized in that the intelligent single-phase voltage adjustor comprises an intelligent control switching unit and a tap isolation transformer; the intelligent control switching unit comprises a main control MCU, a single-phase alternating voltage and current collecting module, a switch action unit and a wireless communication module, the single-phase alternating voltage and current collecting module, the wireless communication module and the switch action unit are connected with the main control MCU, each relay in the switch action unit is connected with a standby relay in series and then connected with a single-pole double-throw interlocking alternating-current contactor and a single-pole single-throw common alternating-current contactor in parallel, and the wireless communication module comprises a GPRS wireless communication module body and a WIFI wireless communication module body; the android system handheld terminal is connected with the intelligent single-phase voltage adjustor through the GPRS wireless communication module body or the WIFI wireless communication module body. The stable output voltage of a user side is achieved.

The invention discloses a three-level boost circuit. The circuit comprises a direct-current power supply DC, a boost inductance L1, a power switch tube Q1, a power switch tube Q2, an output bus filtercapacitor C1, an output bus filter capacitor C2, a diode D1, a diode D2, a clamping diode D3 and an energy converter. According to the three-level booster circuit disclosed by the invention, the direct-current power supply DC and the output share the cathode; the problem that a symmetrical Boost circuit has the common-mode interference is solved; and the boost function in a high-voltage system can be realized through serial connection of the power switch tube Q1 and the power switch tube Q2.

The invention discloses a household appliance, a power supply circuit of the household appliance, a control method of the power supply circuit and a storage medium, and the power supply circuit of the household appliance comprises a conversion unit and a switching unit, and then the switching unit can switch the working modes of the conversion unit according to the voltage amplitude of the input alternating current, the working modes of the conversion unit can comprise a rectification voltage-multiplying boosting working mode and a rectification boosting working mode, and the conversion unit can generate corresponding voltage to supply power to a load after being switched by the switching unit. Therefore, the power supply circuit of the household appliance can realize the boosting function of different voltage systems, expand the working voltage range of the power supply circuit, improve the bidding capability of a product and increase the applicability of the product.

The invention belongs to the field of DC-AC inversion equipment, and relates to a novel voltage-multiplying-Z source inverter. A dotted terminal of the first winding is connected with the positive electrode of the DC power supply, and the other end of the first winding is connected with the negative electrode of a first capacitor and the positive electrode of a second diode. The positive electrodeof the first capacitor is connected with the non-dotted terminal of a second winding and the negative electrode of a second diode, and the dotted terminal of the second winding is connected with thenegative electrode of the first diode and the negative electrode of the second capacitor. The positive electrode of the second capacitor is connected with the negative electrode of the second diode. Athree-phase voltage type bridge inverter circuit unit consists of six power switching tubes with anti-parallel diodes, and is used for receiving a switch signal provided by external equipment. The inverter is reasonable in overall structural design and simple to operate, the number of components is reduced through the combined structure of the boost circuit and the inverter circuit, the probability density of the circuit is improved, the production cost and the failure rate are reduced, and the high-gain boost inverter is suitable for high-gain boost inversion occasions.

The invention discloses a novel solar cell which comprises an optical acquisition and conversion module and a boost module. The voltage boost module is composed of a boost circuit which reduces stress of a voltage switch. The boost circuit which reduces the stress of the voltage switch comprises the components of the optical acquisition and conversion module which acquires an input voltage Vin, switch components S1 and S2, diodes D1 and D2, an inductor L, an input capacitor C1, an intermediate capacitor C2 and an output capacitor Co. An input power supply generates the input voltage Vin. The switch components S1 and S2 respectively have a parasitic capacitance CS1 and a parasitic capacitance CS2. Through switching on and switching off the switch components S1 and S2, the output voltage of the solar cell is raised and furthermore energy loss is reduced.

The invention discloses a control method for realizing the low-voltage switch stress of a boosted circuit. The boosted circuit comprises an input power supply, switching elements S1 and S2, diodes D1 and D2, an inductor L, an input capacitor C1, an intermediate capacitor C2, and an output capacitor Co. The input power supply generates an input voltage Vin; and the switching elements S1 and S2 are respectively provided with parasitic capacitors CS1 and CS2. According to the control method, turning on and off of the switching elements S1 and S2 are controlled, so that the boost function is realized and the voltage drops between the collectors and emitters of the switching elements S1 and S2 can be substantially reduced based on comparison with the prior art. No energy-consuming element exists in the circuit; and the work efficiency of the converter is improved.

The invention discloses a unidirectional transformation type high-voltage DC circuit break device and a fault removing method. The device comprise a circuit breaker and a control system, the control system comprises an inner-loop adjusting control current and an outer-loop adjusting control voltage, and an auxiliary controller is added to double-closed-loop adjustment to realize transformation and protection control of the high-voltage DC circuit breaker. Compared with a traditional high-voltage circuit breaker, the device has the advantages of more functions, high ON / OFF speed and reduced cost, a boosting transformer function of the circuit breaker is realized when a high-voltage DC power transmission system runs normally, and the device can be applied to power lines of different voltage levels flexibly; and a short-circuit fault can be removed effectively and rapidly when the short circuit fault occurs in the power transmission line, and high-voltage DC power transmission equipment and load equipment are protected.

The invention discloses a solar cell, which includes a light collection conversion module and a boost module, the boost module is composed of a boost circuit that reduces the stress of a voltage switch, and the boost circuit that reduces the stress of a voltage switch includes a The input voltage Vin of the optical acquisition conversion module, the switching elements S1, S2, diodes D1, D2, inductor L, input capacitor C1, intermediate capacitor C2 and output capacitor Co, the input power supply generates the input voltage Vin, and the switching elements S1 and S2 respectively have parasitic The capacitors CS1 and CS2 increase the output voltage of the solar cell and reduce energy loss by controlling the on and off of the switching elements S1 and S2.

The invention discloses a pelvic floor muscle rehabilitation instrument based on a PIC. The pelvic floor muscle rehabilitation instrument comprises a main control circuit, a booster circuit, a voltage stabilizing circuit, a pulse output circuit and an AD acquisition circuit, the master control circuit comprises a single-chip microcomputer U2 and a capacitor C5. The boost circuit comprises an inductor L1, a fast switching diode D1 and a first NPN triode in an integrated transistor Q1. The voltage stabilizing circuit comprises a voltage stabilizing diode D3 and a capacitor C1; the pulse output circuit comprises an integrated transistor Q2, a capacitor C3 and a second NPN triode in the integrated transistor Q1; the AD acquisition circuit comprises a resistor R3 and a resistor R4. According to the boost circuit, the boost function is achieved only through three simple electronic elements, the boost function under the condition of a limited circuit size is achieved, and cost is reduced; according to the invention, whether a load is connected or not is judged by collecting the change of the voltage value divided by the resistor R3 and the resistor R4, and whether a pulse signal is output or not is determined, so that the power consumption is reduced under the condition that the load is not connected, and the energy-saving effect is achieved.

The invention provides a low-cost high-gain three-level inverter and a space vector modulation method thereof. The inverter circuit topology provided by the invention comprises a direct current input side capacitor, a boost network and a low-cost three-level inverter, can realize boost and buck operation in a single-stage power conversion mode, and can remarkably reduce the number of power switch tubes and passive devices at the same time. The novel space vector modulation method provided by the invention comprises the steps of sector judgment, basic voltage vector selection and duty ratio calculation, neutral point balance active control, direct connection state injection and duty ratio updating, switching sequence design and the like. According to the method, the direct connection state is injected into the small vector, the boost function is achieved, normal alternating current output voltage is not affected, neutral-point voltage deviation caused by non-ideal factors can be effectively restrained through the neutral-point balance active control strategy, and then the operation reliability of the system is guaranteed.

The invention discloses an isolated high-boost quasi-switched capacitor converter, which is composed of a quasi-double-switch step-up switched capacitor converter unit at the front stage and an isolation transformer unit at the rear stage. The voltage switched capacitor converter unit and the isolation transformer unit of the rear stage are connected through a high-frequency isolation transformer. The high-frequency isolation transformer is composed of a primary coil inductance Lp, a secondary coil inductance Ls, and a secondary coil inductance Lt. The present invention effectively reduces the input The current peak value realizes continuous input current, realizes high boost with simple topology, and combines with isolation transformer to make it have the function of isolated boost.

The invention discloses a solar cell outputting high voltage. The solar cell comprises a light acquisition and conversion module and a voltage boosting module. The voltage boosting module is composed of a voltage boosting circuit reducing voltage switching stress. The voltage boosting circuit reducing voltage switching stress comprises voltage Vin inputted by the light acquisition and conversion module, switching elements S1 and S2, diodes D1 and D2, an inductor L, an input capacitor C1, an intermediate capacitor C2 and an output capacitor C0. An input power supply generates input voltage Vin. The switching elements S1 and S2 are respectively provided with a parasitic capacitor CS1 and a parasitic capacitor CS2. Output voltage of the solar cell is enhanced by controlling on and off of the switching elements S1 and S2, and energy loss is also reduced.

The invention discloses an isolation type highly boosted quasi-switched capacitor converter. The isolation type highly boosted quasi-switched capacitor converter comprises two stages of structures including a pre-stage quasi double-switch boosted switched capacitor converter unit and a post-stage isolation transformer unit, the pre-stage quasi double-switch boosted switched capacitor converter unit and the post-stage isolation transformer unit are connected through a high-frequency isolation transformer, and the high-frequency isolation transformer is formed by a primary coil inductor Lp, a secondary coil inductor Ls and a secondary coil inductor Lt. According to the isolation type highly boosted quasi-switched capacitor converter, an input current peak value is effectively reduced, continuous input current is realized, high boosting is realized through a simple topology, and the function of isolation boosting is realized with the combination of the isolation transformer.

A charging circuit comprises a charging circuit input end, a charging circuit output end and a main loop, a main switch tube, an inductor and a diode are sequentially connected in series on a positive pole line of the main loop, a positive pole end of the diode is connected with the inductor, and a negative pole end of the diode is connected with the output end of the charging circuit. A capacitor is electrically connected between the cathode end of the diode and the grounding wire of the main loop; and a control device is also arranged between the positive line of the main loop of the charging circuit and the grounding line of the main loop. The charging circuit provided by the invention has two functions of voltage boosting and voltage reducing at the same time, and can be switched between the voltage boosting function and the voltage reducing function as required.

The invention discloses an automatic propulsion type safety management device for a pressurizing isolation type medical nursing instrument. The automatic propulsion type safety management device comprises a medical instrument transfer trolley, a walking inflation telescopic mechanism, a closed middle sliding block, a material rotating mechanism and a linear pushing mechanism. The invention belongs to the technical field of medical tools, and particularly relates to an automatic propulsion type safety management device for a pressurizing isolation type medical nursing instrument, which realizes safe handover of sterile medical instruments by using the principle of increasing pressure by compressed air. The problem that sterile medical instruments are prone to being polluted by external air in the frequent handover process is effectively solved, a rotating mechanism and a linear reciprocating mechanism are creatively fused, safe taking-out of the medical nursing instruments is achieved, and the problem that the medical nursing instruments are prone to being contaminated by bacteria due to the fact that a vehicle door needs to be frequently opened in the sterile medical instrument transportation process is solved.

The invention discloses a control circuit of a remote controller with a backlight screen. The control circuit comprises a key circuit, a code sending circuit, a power supply booster circuit, a backlight switch circuit, an MCU (Microprogrammed Control Unit) control circuit and an MCU power supply circuit, wherein the power supply booster circuit is used for boosting power supply voltage and supplying power to a backlight; the backlight switch circuit is used for controlling the on and off of the backlight; the MCU control circuit is used for receiving or outputting a signal to control the circuits and driving an LCD (Liquid Crystal Display); the key circuit and the code sending circuit are connected with the MCU; the input end of the booster circuit is connected with a power supply; the output end of the booster circuit is connected with the backlight; the control end of the backlight switch circuit is connected with the MCU; the input end of the MCU power supply circuit is connected with the power supply; the output end of the MCU power supply circuit is connected with the MCU. The control circuit is characterized in that the booster circuit is also connected with the MCU; output voltage of the booster circuit is controlled by a PWM (Pulse-Width Modulation) signal outputted by the MCU. The invention provides the control circuit of the remote controller with the backlight screen. The booster circuit is used to replace a DC (Direct Current) / DC booster power supply chip, the problem of automatic reset of the remote controller is solved, and the service life of a battery is longer.

The invention discloses a low-voltage intelligent voltage regulating and stabilizing system, which includes a single-phase intelligent voltage regulator. Control MCU, single-phase AC voltage and current acquisition module, switch action unit, wireless communication module, single-phase AC voltage and current acquisition module, wireless communication module, power supply module, and switch action unit are respectively connected with the main control MCU, and the switch action unit is composed of a Single-pole double-throw interlocking AC contactor, a single-pole single-throw common AC contactor, a relay and a spare relay, each relay is connected in series with a spare relay and a single-pole double-throw interlocking SPST ordinary AC contactors are connected in parallel; the wireless communication module includes GPRS wireless communication module and WIFI wireless communication module. Realize that the user end automatically keeps the output voltage stable.

The invention relates to the field of modular electrical cabinets, in particular to a constant torque boosting and pulling locker, a chassis bracket device and a cabinet. The locking device includes a lock rod and a lock cap. The screw sleeve is threaded on the lock rod. The rear part of the screw sleeve is equipped with a constant torque drive mechanism, and the front part is equipped with an output sleeve. The constant torque drive mechanism includes a force limiting spring and a pressure plate. , the transmission piece and the rotatable screw cap, there is a retaining wall between the two ends of the screw cap, the barrier wall is provided with a transparent installation hole and a transmission steel ball is installed in the installation hole, the pressing piece and the transmission piece are separately located in the On both sides of the retaining wall, the transmission plate is in unrotatable fit with the screw sleeve and there is a ball groove corresponding to the steel ball on it, and the force limiting spring is installed between the side of the pressing plate away from the steel ball and the screw sleeve; the output sleeve The front part is equipped with a locking hook matching structure, and a rotating transmission mechanism is provided between the screw sleeve and the inversion edge of the transmission sleeve. The invention solves the problem that the existing locker for the chassis cannot assist the insertion and removal of the chassis.

The invention relates to a through physical separation-type Z-source inverter with high booster multiple, which relates to the field of Z-source inverters, and comprises a direct current voltage source, a first blocking diode, a second blocking diode, a Z-source impedance network and a three-phase inverter bridge; and the Z-source impedance network comprises a first inductor, a second inductor, a first capacitor and a second capacitor which form an X-shaped structure. The inverter is characterized by also comprising a full-control switch device, a large capacitor and a power diode; the negative pole of the second capacitor and the collector of the full-control switch device are parallelly connected to the anode of the power diode; the emitter of the full-control switch device is connected with the negative pole of a direct current power supply; the cathode of the power diode is connected with the positive input end of the three-phase inverter bridge; the large capacitor is parallelly connected with the three-phase inverter bridge; and the positive pole and the negative pole of the capacitors are respectively connected with the positive input end and the negative input end of the three-phase inverter bridge correspondingly. According to the through physical separation-type Z-source inverter with high booster multiple, no coupling relationship exists between a booster factor and an inverter factor, the through duty ratio is independently controlled, and the booster multiple which can be realized is high.