CN220139426U - quasi-Z source boost converter - Google Patents
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- CN220139426U CN220139426U CN202321417470.9U CN202321417470U CN220139426U CN 220139426 U CN220139426 U CN 220139426U CN 202321417470 U CN202321417470 U CN 202321417470U CN 220139426 U CN220139426 U CN 220139426U
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Abstract
The utility model relates to a quasi-Z source boost converter which comprises a power supply, a first quasi-Z source module, a second quasi-Z source module, a first boost unit, a second boost unit, a third diode, a first switch tube and an output unit, wherein the first switch tube is connected with the first boost unit; the first end of the first quasi-Z source module is connected with the positive electrode of the power supply, and the first quasi-Z source module comprises a first capacitor, a second capacitor, a first inductor, a first diode and a first Z source unit; the second end of the second quasi Z source module is respectively connected with the second end of the first boost unit, the first end of the first switch tube and the output unit, and the negative electrode of the power supply is respectively connected with the second end of the second boost unit and the second end of the first switch tube; the output unit is connected with a load; the voltage gain ratio of the converter provided by the utility model is high.
Description
Technical Field
The utility model belongs to the technical field of converters, and particularly relates to a quasi-Z source boost converter.
Background
Existing Boost converters mostly use high duty cycles to achieve high Boost, but use high duty cycles to generate high voltage gain ratios have a number of drawbacks including higher switching and conduction losses, poor transient response, voltage peaks and EMI, in addition it creates significant diode reverse recovery problems, and as the duty cycle increases, the voltage stress of the switches increases, which limits their use in very high voltage applications.
Disclosure of Invention
The utility model aims at a plurality of problems caused by the fact that a conventional Boost converter is high in duty ratio to achieve high boosting ratio, and provides a quasi-Z source Boost converter which has higher voltage gain ratio under the same duty ratio.
A quasi-Z source boost converter comprises a power supply, a first quasi-Z source module, a second quasi-Z source module, a first boost unit, a second boost unit, a third diode, a first switch tube and an output unit;
the first end of the first quasi-Z source module is connected with the positive electrode of the power supply, and the first quasi-Z source module comprises a first capacitor, a second capacitor, a first inductor, a first diode and a first Z source unit; the first end of the first inductor is connected with the first end of the first capacitor, the second end of the first capacitor is connected with the first end of the first Z source unit and the cathode of the first diode, the anode of the first diode is connected with the second end of the first inductor and the first end of the second capacitor, and the second end of the first Z source unit is connected with the second end of the second capacitor; the first end of the first inductor is a first end of a first quasi-Z source, and the second end of the second capacitor is a second end of the first quasi-Z source;
the second end of the second quasi Z source module is respectively connected with the second end of the first boost unit, the first end of the first switch tube and the output unit, and the negative electrode of the power supply is respectively connected with the second end of the second boost unit and the second end of the first switch tube;
the output unit is connected with a load;
the power supply is used for charging the first quasi-Z source module, the second quasi-Z source module, the first boosting unit and the second boosting unit respectively, and the first quasi-Z source module, the second quasi-Z source module, the first boosting unit and the second boosting unit charge the output unit.
Optionally, the first Z source unit includes a third capacitor, a fourth capacitor, a second inductor, a third inductor, and a second diode;
the first end of the third capacitor is connected with the first end of the second inductor, the second end of the third capacitor is connected with the cathode of the second diode and the first end of the third inductor, the second end of the third inductor is connected with the second end of the fourth capacitor, and the first end of the fourth capacitor is connected with the anode of the second diode and the second end of the second inductor;
the first end of the second inductor is the first end of the first Z source unit, and the second end of the third inductor is the second end of the first Z source unit.
Optionally, the second quasi-Z source module includes a fifth capacitor, a sixth capacitor, a fourth inductor, a fourth diode, and a second Z source unit;
the first end of the fifth capacitor is connected with the first end of the fourth inductor, and the second end of the fifth capacitor is connected with the cathode of the fourth diode and the first end of the second Z source unit; the second end of the fourth inductor is connected with the anode of the fourth diode and the first end of the sixth capacitor, and the second end of the sixth capacitor is connected with the second end of the first Z source unit;
the first end of the fourth inductor is the first end of the second quasi-Z source module, and the second end of the sixth capacitor is the second end of the second quasi-Z source module.
Optionally, the second Z source unit includes a seventh capacitor, an eighth capacitor, a fifth inductor, a sixth inductor, and a fifth diode;
the first end of the seventh capacitor is connected with the first end of the fifth inductor, the second end of the seventh capacitor is connected with the cathode of the fifth diode and the first end of the sixth inductor, the second end of the sixth inductor is connected with the second end of the eighth capacitor, and the first end of the eighth capacitor is connected with the anode of the fifth diode and the second end of the fifth inductor;
the first end of the fifth inductor is the first end of the second Z source unit, and the second end of the sixth inductor is the second end of the second Z source unit.
Optionally, the first boost unit is a ninth capacitor, a first end of the ninth capacitor is a first end of the first boost unit, and a second end of the ninth capacitor is a second end of the first boost unit.
Optionally, the second boost unit is a tenth capacitor, a first end of the tenth capacitor is a first end of the second boost unit, and a second end of the tenth capacitor is a second end of the second boost unit.
Optionally, the output unit includes an output diode and an output capacitor;
the anode of the output diode is connected with the second end of the sixth capacitor, the cathode of the output diode is connected with the first end of the output capacitor, and the second end of the output capacitor is connected with the second end of the first switch tube; the first end of the load is connected with the first end of the output capacitor, and the second end of the load is connected with the second end of the output capacitor.
Optionally, in a working period, the quasi-Z source boost converter sequentially works in a first working mode and a second working mode;
first working mode: the first switch tube is conducted, the first diode, the second diode, the third diode, the fourth diode, the fifth diode and the output diode are turned off, and the power supply, the first capacitor, the second capacitor, the third capacitor, the fourth capacitor, the fifth capacitor, the sixth capacitor, the seventh capacitor, the eighth capacitor, the ninth capacitor and the tenth capacitor charge the first inductor, the second inductor, the third inductor, the fourth inductor, the fifth inductor and the sixth inductor; meanwhile, the output capacitor supplies energy to the load;
second mode of operation: the first switch tube is turned off, and the power supply charges the first capacitor, the second capacitor, the third capacitor, the fourth capacitor, the fifth capacitor, the sixth capacitor, the seventh capacitor, the eighth capacitor, the ninth capacitor and the tenth capacitor; meanwhile, the first inductor, the second inductor, the third inductor, the fourth inductor, the fifth inductor and the sixth inductor provide energy for the load.
Optionally, the system further comprises a control module, wherein the control module comprises:
the voltage sensor is used for collecting the output voltage of the quasi-Z source boost converter, and the input end of the voltage sensor is connected with the first end of the load;
the first input end of the adder is connected with the output end of the inductance sensor, and the second input end of the adder receives the reference voltage;
the PI controller is used for outputting a duty ratio signal, and the input end of the PI controller is connected with the output end of the adder;
and the modulation module is used for outputting a driving signal according to the duty ratio signal and controlling the on or off of the first switching tube.
Optionally, the first switch tube is a field effect tube, the first end of the first switch tube is a drain electrode of the field effect tube, the second end of the first switch tube is a source electrode of the field effect tube, and the third end of the first switch tube is a gate electrode of the field effect tube.
The beneficial effects are that:
according to the quasi-Z source boost converter provided by the utility model, the energy transmission and the boost of the converter are realized by utilizing the first quasi-Z source module, the second quasi-Z source module, the first boost unit and the second boost unit, the high voltage gain ratio of the quasi-Z source boost converter is realized, and under the condition that the duty ratio is the same, the voltage gain ratio of the converter provided by the utility model is higher than that of a conventional converter, so that the voltage gain ratio is improved without using an extreme duty ratio, and a plurality of problems caused by the increase of the duty ratio are avoided.
Drawings
The utility model will now be described in further detail with reference to the drawings and to specific embodiments.
Fig. 1 is a schematic diagram of a topology structure of a quasi-Z source boost converter according to the present embodiment.
Fig. 2 is a circuit diagram of an operation of the quasi-Z source boost converter according to the present embodiment in a first operation mode.
Fig. 3 is a circuit diagram of an operation of the quasi-Z source boost converter according to the present embodiment in the second operation mode.
Reference numerals:
vin, power supply; r, load; c1, a first capacitor; c2, a second capacitor; c3, a third capacitor; c4, a fourth capacitor; c5, a fifth capacitor; c6, a sixth capacitor; c7, a seventh capacitor; c8, an eighth capacitor; c9, a ninth capacitor; c10, tenth capacitance; l1, a first inductor; l2, a second inductor; l3, a third inductor; l4, a fourth inductor; l5, a fifth inductor; l6, a sixth inductor; d1, a first diode; d2, a second diode; d3, a third diode; d4, a fourth diode; d5, a fifth diode; s, a first switching tube; do, output diode; co, output capacitance.
Detailed Description
The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art. In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.
As shown in fig. 1, the present embodiment provides a quasi-Z source boost converter, which includes a power source Vin, a first quasi-Z source module, a second quasi-Z source module, a first boost unit, a second boost unit, a third diode D3, a first switching tube S, and an output unit.
The first quasi-Z source module comprises a first capacitor C1, a second capacitor C2, a first inductor L1, a first diode D1 and a first Z source unit, wherein the first Z source unit comprises a third capacitor C3, a fourth capacitor C4, a second inductor L2, a third inductor L3 and a second diode D2; the first end of the first capacitor C1 is connected with the first end of the first inductor L1, the second end of the first capacitor C1 is respectively connected with the cathode of the first diode D1, the first end of the second inductor L2 and the first end of the third capacitor C3, the second end of the third capacitor C3 is respectively connected with the cathode of the second diode D2 and the first end of the third inductor L3, the second end of the third inductor L3 is respectively connected with the second end of the fourth capacitor C4 and the second end of the second capacitor C2, the first end of the fourth capacitor C4 is respectively connected with the anode of the second diode D2 and the second end of the second inductor L2, and the second end of the first inductor L1 is respectively connected with the anode of the first diode D1 and the first end of the second capacitor C2. The first end of the first inductor L1 is the first end of the first quasi-Z source module, and the second end of the second capacitor C2 is the second end of the first quasi-Z source module; the first end of the second inductor L2 is the first end of the first Z source unit, and the second end of the third inductor L3 is the second end of the first Z source unit.
The structure of the second quasi-Z source module is identical to that of the first quasi-Z source module, specifically, the second quasi-Z source module comprises a fifth capacitor C5, a sixth capacitor C6, a fourth inductor L4, a fourth diode D4 and a second Z source unit, and the second Z source unit comprises a seventh capacitor C7, an eighth capacitor C8, a fifth inductor L5, a sixth inductor L6 and a fifth diode D5; the first end of the fifth capacitor C5 is connected to the first end of the fourth inductor L4, the second end of the fifth capacitor C5 is connected to the first end of the seventh capacitor C7, the first end of the fifth inductor L5 and the cathode of the fourth diode D4, the second end of the seventh capacitor C7 is connected to the first end of the sixth inductor L6 and the cathode of the fifth diode D5, the second end of the sixth inductor L6 is connected to the second end of the eighth capacitor C8 and the second end of the sixth capacitor C6, the first end of the eighth capacitor C8 is connected to the anode of the fifth diode D5 and the second end of the fifth inductor L5, and the first end of the sixth capacitor C6 is connected to the anode of the fourth diode D4 and the first end of the fourth inductor L4. The first end of the fourth inductor L4 is a first end of the second quasi-Z source module, and the second end of the sixth capacitor C6 is a second end of the second quasi-Z source module; the first end of the fifth inductor L5 is the first end of the second Z source unit, and the second end of the sixth inductor L6 is the second end of the second Z source unit.
The first boost unit is a ninth capacitor C9, a first end of the ninth capacitor C9 is a first end of the first boost unit, and a second end of the ninth capacitor C9 is a second end of the first boost unit.
The second boost unit is a tenth capacitor C10, a first end of the tenth capacitor C10 is a first end of the second boost unit, and a second end of the tenth capacitor C10 is a second end of the second boost unit.
The positive pole of power Vin is connected with the first end of the accurate Z source module of first, and the second end of the accurate Z source module of first is connected with the first end of first unit and the positive pole of third diode D3 respectively, and the negative pole of third diode D3 is connected with the first end of the accurate Z source module of second unit of second respectively, and the second end of the accurate Z source module of second is connected with the second end of first unit of stepping up, the first end of first switching tube S respectively, and the second end of second unit of stepping up, the second end of second switching tube are connected with the negative pole of power Vin respectively.
In this embodiment, the first switching tube S is a field effect tube, the first end of the first switching tube S is a drain electrode of the field effect tube, the second end of the first switching tube S is a source electrode of the field effect tube, and the third end of the first switching tube S is a gate electrode of the field effect tube.
The output unit comprises an output diode Do and an output capacitor Co, wherein the anode of the output diode Do is connected with the first end of the first switching tube S, the cathode of the output diode Do is connected with the first end of the output capacitor Co, and the second end of the output capacitor Co is connected with the second end of the first switching tube S.
The first end of the load R is connected with the first end of the output capacitor Co, and the second end of the load R is connected with the second end of the output capacitor Co.
As a further improvement of the present embodiment, the quasi-Z source boost converter provided in the present embodiment further includes a control module, where the control module includes a voltage sensor, an adder, a PI controller, and a modulation module.
The voltage sensor is used for collecting output voltage of the quasi-Z source boost converter, the output voltage is the voltage of the load R, and the input end of the voltage sensor is connected with the first end of the load R.
The first input end of the adder is connected with the output end of the inductance sensor, and the second input end of the adder receives the reference voltage; the output of the adder outputs an error signal.
The PI controller is used for outputting a duty ratio signal according to the error signal, and the input end of the PI controller is connected with the output end of the adder.
The modulation module is used for outputting a driving signal according to the duty ratio signal and controlling the on or off of the first switching tube S; the output end of the modulation module is connected with the output end of the PI controller, and the output end of the modulation module is connected with the third end of the first switching tube S.
In fig. 1, e is represented as an error signal, d is represented as a duty cycle signal, vo is an output voltage, and Vref is a reference voltage.
In one working period, the quasi-Z source boost converter sequentially works in a first working mode and a second working mode;
first working mode: the first switch tube S is turned on, and the first diode D1, the second diode D2, the third diode D3, the fourth diode D4, the fifth diode D5 and the output diode Do are turned off, so that the power supply Vin, the first capacitor C1, the second capacitor C2, the third capacitor C3, the fourth capacitor C4, the fifth capacitor C5, the sixth capacitor C6, the seventh capacitor C7, the eighth capacitor C8, the ninth capacitor C9 and the tenth capacitor C10 charge the first inductor L1, the second inductor L2, the third inductor L3, the fourth inductor L4, the fifth inductor L5 and the sixth inductor L6; at the same time, the output capacitor Co supplies energy to the load R.
Second mode of operation: the first switch tube S is turned off, and the power supply Vin charges the first capacitor C1, the second capacitor C2, the third capacitor C3, the fourth capacitor C4, the fifth capacitor C5, the sixth capacitor C6, the seventh capacitor C7, the eighth capacitor C8, the ninth capacitor C9 and the tenth capacitor C10; meanwhile, the first inductor L1, the second inductor L2, the third inductor L3, the fourth inductor L4, the fifth inductor L5 and the sixth inductor L6 provide energy to the load R.
When the converter is in steady state, the working period of the first switching tube S is set as T S The duty cycle is D, and the following relation can be obtained by the first operation mode:
wherein V is L1 At the voltage of the first inductance L1, V L2 At the voltage of the second inductance L2, V L3 At the voltage of the third inductance L3, V L4 At the voltage of the fourth inductance L4, V L5 At the voltage of the fifth inductance L5, V L6 At the voltage of the sixth inductance L6, V in Is the voltage of the power Vin, V C1 At the voltage of the first capacitor C1, V C2 At the voltage of the second capacitor C2, V C3 At the voltage of the third capacitor C3, V C4 For the voltage of the fourth capacitor C4, V C5 At the voltage of the fifth capacitor C5, V C6 For the voltage of the sixth capacitor C6, V C7 For the seventh capacitor C7, V C8 Is the eighth capacitor C8, V C9 Is a ninth capacitor C9, V C10 Is the tenth capacitance C10.
The following relation can be obtained by the second operation mode:
wherein V is O Is the output voltage, i.e. the voltage across the load R.
The principle of volt-second balance of inductance is utilized to obtain:
wherein T is S D is the duty cycle for the first switching tube S.
The gain ratio of the input-output voltage is obtained according to the above equation:
wherein M is the gain ratio of the input voltage and the output voltage; from the above equation, the gain ratio of the quasi-Z source boost converter is high.
The voltage stress of the first capacitor C1, the third capacitor C3, the fourth capacitor C4, the fifth capacitor C5, the seventh capacitor C7 and the eighth capacitor C8 can also be obtained according to the volt-second balance principle:
as can be seen from the above formula, the voltage stress of the first capacitor C1, the third capacitor C3, the fourth capacitor C4, the fifth capacitor C5, the seventh capacitor C7 and the eighth capacitor C8 is equal, and the voltage stress is lower.
The main conception of the utility model is to design a first quasi-Z source module and a second quasi-Z source module, then cooperate with a first boosting unit and a second boosting unit to realize boosting, and utilize a third diode D3 and a first switch tube S to control a current path so that capacitors C1, C2, C3, C4, C5, C6, C7, C8, C9, C10 and inductors L1, L2, L3, L4, L5 and L6 are alternately charged and discharged, thereby realizing the transfer and accumulation of energy of the converter, and leading the voltage stress of the first capacitor C1, the third capacitor C3, the fourth capacitor C4, the fifth capacitor C5, the seventh capacitor C7 and the eighth capacitor C8 to be low while leading the converter to have high voltage gain.
It is noted that the flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present utility model. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.
In the several embodiments provided by the present utility model, it should be understood that the disclosed apparatus and method may be implemented in other manners. The above-described apparatus embodiments are merely illustrative, for example, the division of the units is merely a logical function division, and there may be other manners of division in actual implementation, and for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some communication interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present utility model may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present utility model may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present utility model. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a Read-only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model, and are intended to be included within the scope of the appended claims and description.
Claims (10)
1. The quasi-Z source boost converter is characterized by comprising a power supply (Vin), a first quasi-Z source module, a second quasi-Z source module, a first boost unit, a second boost unit, a third diode (D3), a first switching tube (S) and an output unit;
the first end of the first quasi-Z source module is connected with the positive electrode of the power supply (Vin), and the first quasi-Z source module comprises a first capacitor (C1), a second capacitor (C2), a first inductor (L1), a first diode (D1) and a first Z source unit; the first end of the first inductor (L1) is connected with the first end of the first capacitor (C1), the second end of the first capacitor (C1) is connected with the first end of the first Z source unit and the cathode of the first diode (D1), the anode of the first diode (D1) is connected with the second end of the first inductor (L1) and the first end of the second capacitor (C2), and the second end of the first Z source unit is connected with the second end of the second capacitor (C2); the first end of the first inductor (L1) is a first end of a first quasi-Z source, and the second end of the second capacitor (C2) is a second end of the first quasi-Z source;
the second end of the first quasi-Z source module is respectively connected with the first end of the first boosting unit and the anode of a third diode (D3), the cathode of the third diode (D3) is connected with the first end of the second boosting unit and the first end of the second quasi-Z source module, the second end of the second quasi-Z source module is respectively connected with the second end of the first boosting unit, the first end of a first switching tube (S) and an output unit, and the cathode of a power supply (Vin) is respectively connected with the second end of the second boosting unit and the second end of the first switching tube (S);
the output unit is connected with a load (R);
the power supply (Vin) is used for charging the first quasi-Z source module, the second quasi-Z source module, the first boosting unit and the second boosting unit respectively, and the first quasi-Z source module, the second quasi-Z source module, the first boosting unit and the second boosting unit charge the output unit.
2. A quasi-Z source boost converter according to claim 1, wherein the first Z source unit comprises a third capacitor (C3), a fourth capacitor (C4), a second inductor (L2), a third inductor (L3) and a second diode (D2);
the first end of the third capacitor (C3) is connected with the first end of the second inductor (L2), the second end of the third capacitor (C3) is connected with the cathode of the second diode (D2) and the first end of the third inductor (L3), the second end of the third inductor (L3) is connected with the second end of the fourth capacitor (C4), and the first end of the fourth capacitor (C4) is connected with the anode of the second diode (D2) and the second end of the second inductor (L2);
the first end of the second inductor (L2) is the first end of the first Z source unit, and the second end of the third inductor (L3) is the second end of the first Z source unit.
3. A quasi-Z source boost converter according to claim 2, wherein the second quasi-Z source module comprises a fifth capacitor (C5), a sixth capacitor (C6), a fourth inductor (L4), a fourth diode (D4) and a second Z source unit;
the first end of the fifth capacitor (C5) is connected with the first end of the fourth inductor (L4), and the second end of the fifth capacitor (C5) is connected with the cathode of the fourth diode (D4) and the first end of the second Z source unit; the second end of the fourth inductor (L4) is connected with the anode of the fourth diode (D4) and the first end of the sixth capacitor (C6), and the second end of the sixth capacitor (C6) is connected with the second end of the first Z source unit;
the first end of the fourth inductor (L4) is the first end of the second quasi-Z source module, and the second end of the sixth capacitor (C6) is the second end of the second quasi-Z source module.
4. A quasi-Z source boost converter according to claim 3, wherein the second Z source unit comprises a seventh capacitor (C7), an eighth capacitor (C8), a fifth inductor (L5), a sixth inductor (L6) and a fifth diode (D5);
the first end of the seventh capacitor (C7) is connected with the first end of the fifth inductor (L5), the second end of the seventh capacitor (C7) is connected with the cathode of the fifth diode (D5) and the first end of the sixth inductor (L6), the second end of the sixth inductor (L6) is connected with the second end of the eighth capacitor (C8), and the first end of the eighth capacitor (C8) is connected with the anode of the fifth diode (D5) and the second end of the fifth inductor (L5);
the first end of the fifth inductor (L5) is the first end of the second Z source unit, and the second end of the sixth inductor (L6) is the second end of the second Z source unit.
5. The quasi-Z source boost converter of claim 4, wherein the first boost unit is a ninth capacitor (C9), a first terminal of the ninth capacitor (C9) is a first terminal of the first boost unit, and a second terminal of the ninth capacitor (C9) is a second terminal of the first boost unit.
6. The quasi-Z-source boost converter of claim 5, wherein the second boost unit is a tenth capacitor (C10), the first terminal of the tenth capacitor (C10) is the first terminal of the second boost unit, and the second terminal of the tenth capacitor (C10) is the second terminal of the second boost unit.
7. A quasi-Z source boost converter according to claim 6, wherein said output unit comprises an output diode (Do) and an output capacitor (Co);
the anode of the output diode (Do) is connected with the second end of the sixth capacitor (C6), the cathode of the output diode (Do) is connected with the first end of the output capacitor (Co), and the second end of the output capacitor (Co) is connected with the second end of the first switch tube (S); the first end of the load (R) is connected with the first end of the output capacitor (Co), and the second end of the load (R) is connected with the second end of the output capacitor (Co).
8. The quasi-Z source boost converter of claim 7, wherein the quasi-Z source boost converter operates in a first operating mode and a second operating mode sequentially during a single operating cycle;
first working mode: the first switch tube (S) is conducted, the first diode (D1), the second diode (D2), the third diode (D3), the fourth diode (D4), the fifth diode (D5) and the output diode (Do) are turned off, and the power supply (Vin), the first capacitor (C1), the second capacitor (C2), the third capacitor (C3), the fourth capacitor (C4), the fifth capacitor (C5), the sixth capacitor (C6), the seventh capacitor (C7), the eighth capacitor (C8), the ninth capacitor (C9) and the tenth capacitor (C10) charge the first inductor (L1), the second inductor (L2), the third inductor (L3), the fourth inductor (L4), the fifth inductor (L5) and the sixth inductor (L6); simultaneously, the output capacitor (Co) provides energy for the load (R);
second mode of operation: the first switch tube (S) is turned off, and the power supply (Vin) charges the first capacitor (C1), the second capacitor (C2), the third capacitor (C3), the fourth capacitor (C4), the fifth capacitor (C5), the sixth capacitor (C6), the seventh capacitor (C7), the eighth capacitor (C8), the ninth capacitor (C9) and the tenth capacitor (C10); meanwhile, the first inductor (L1), the second inductor (L2), the third inductor (L3), the fourth inductor (L4), the fifth inductor (L5) and the sixth inductor (L6) provide energy for the load (R).
9. A quasi-Z source boost converter in accordance with any one of claims 1-7, further comprising a control module comprising:
the voltage sensor is used for collecting the output voltage of the quasi-Z source boost converter, and the input end of the voltage sensor is connected with the first end of the load (R);
the first input end of the adder is connected with the output end of the inductance sensor, and the second input end of the adder receives the reference voltage;
the PI controller is used for outputting a duty ratio signal, and the input end of the PI controller is connected with the output end of the adder;
and the modulation module is used for outputting a driving signal according to the duty ratio signal and controlling the on or off of the first switching tube (S).
10. The quasi-Z source boost converter of any one of claims 1-7, wherein the first switching tube (S) is a field effect tube, a first end of the first switching tube (S) is a drain of the field effect tube, a second end of the first switching tube (S) is a source of the field effect tube, and a third end of the first switching tube (S) is a gate of the field effect tube.
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| CN202321417470.9U CN220139426U (en) | 2023-06-06 | 2023-06-06 | quasi-Z source boost converter |
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Address after: 518102 Room 101, 201, 301, Building B, Functional Support Area, Taohuayuan Zhichuang Town, Tiegang Community, Xixiang Street, Baoan District, Shenzhen, Guangdong Province Patentee after: Shenzhen Hengyunchang Vacuum Technology Co.,Ltd. Address before: 518102 Room 101, 201, 301, Building B, Functional Support Area, Taohuayuan Zhichuang Town, Tiegang Community, Xixiang Street, Baoan District, Shenzhen, Guangdong Province Patentee before: SHENZHEN HENGYUNCHANG VACUUM TECHNOLOGY CO.,LTD. |