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 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 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 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 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 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.

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.