CN210606254U - Power electronic building block - Google Patents
Power electronic building block Download PDFInfo
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- CN210606254U CN210606254U CN201921521685.9U CN201921521685U CN210606254U CN 210606254 U CN210606254 U CN 210606254U CN 201921521685 U CN201921521685 U CN 201921521685U CN 210606254 U CN210606254 U CN 210606254U
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Abstract
The application discloses a power electronic building block, wherein a first end of a first reverse conducting type full-control switch unit is used as a first port of the power electronic building block, and a second end of the first reverse conducting type full-control switch unit is used as a fourth port; the first end and the second end of the first switch unit are connected with the second end of the first reverse conducting type full-control switch unit, the third end of the first switch unit is connected with the second end of the second reverse conducting type full-control switch unit and serves as a second port of the power electronic building block, the fourth end of the first switch unit is connected with the first end of the second reverse conducting type full-control switch unit, the first end of the first inductance unit and the first end of the second switch unit are connected, and the second end of the second switch unit is connected with the second end of the first inductance unit and serves as a third port of the power electronic building block. The first switching unit has a first state and a second state. By the aid of the scheme, due to the fact that topology of the power electronic building blocks is reconfigurable, operation experience of a student in designing a circuit is stimulated, and meanwhile, the student is very convenient when the circuit is built.
Description
Technical Field
The utility model relates to a power electronics technical field especially relates to a power electronic building block.
Background
Power electronics technology is a key technology in many areas. Under the stimulation of industrial demands, not only the power electronic technology itself is changing day by day, but also the demand of the related industries on the applied power electronic technology talents is more urgent. However, the development of power electronics technology education has been in pace for a long time and has not followed up with the development of industrial technology. Especially, in the practice teaching link, the experiment content is old, the design of the experimental device can only meet the verified experiment usually, the designed experiment can not be carried out to arouse the operation feeling of the student in the scene, and the requirement of doing middle school and doing middle school can not be realized easily.
At present, in the power electronic technology, a hanging box type structure is generally adopted in the test. The related circuits in the hanging box are connected, the manual circuit connection design of students is not needed, and the students can only carry out verification experiments, which is not beneficial to exciting the operation experience of the students. Moreover, in the power electronic technology, a variety of experiments are performed, for example, a boost conversion circuit, a buck conversion circuit and the like exist, so that a variety of required hanging boxes are caused, further, the workload of maintenance is large, and the experiment cost is high. And if do not adopt the hanging box structure, only place each components and parts and independently connect by the student, though can arouse the student and experience, but can seriously occupy the teaching time length, and the student level of difference is uneven, and the condition of circuit connection mistake can often appear, leads to finding out circuit connection's mistake and revise very troublesome, consequently can not realize the teaching by the independent connected components and parts of student usually.
In summary, how to stimulate the operation feeling of the student in designing the circuit during the power electronic experimental teaching, and meanwhile, the problems that the student independently designs the circuit, takes too long time, and the circuit is inconvenient to modify due to errors can be avoided, are technical problems that need to be solved urgently by those skilled in the art at present.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a power electronic building blocks to when power electronic experiment teaching, arouse student's operation sense of designing the circuit, can avoid the student independently to design the circuit simultaneously again and occupy long overlength, the inconvenient problem of modification of circuit error.
In order to solve the technical problem, the utility model provides a following technical scheme:
a power electronic brick, comprising: the circuit comprises a first reverse conducting type full-control switch unit, a second reverse conducting type full-control switch unit, a first switch unit, a second switch unit and a first inductance unit;
a first end of the first reverse conducting type full-control switch unit is used as a first port of the power electronic building block, and a second end of the first reverse conducting type full-control switch unit is used as a fourth port of the power electronic building block; the first end and the second end of the first switch unit are connected with the second end of the first reverse conducting type full-control switch unit, the third end of the first switch unit is connected with the second end of the second reverse conducting type full-control switch unit and serves as a second port of the power electronic building block, the fourth end of the first switch unit is connected with the first end of the second reverse conducting type full-control switch unit, the first end of the first inductance unit and the first end of the second switch unit respectively, and the second end of the second switch unit is connected with the second end of the first inductance unit and serves as a third port of the power electronic building block;
the second end of the first switch unit is connected with the fourth end of the first switch unit, and the first end of the first switch unit is in a first state when the first end of the first switch unit is disconnected with the third end of the first switch unit; and when the first end of the first switch unit is connected with the third end of the first switch unit, the first state of the first switch unit is the second state.
Preferably, the method further comprises the following steps: the third switching unit is used for storing the first energy storage unit and the second energy storage unit;
the first end of the third switch unit is connected with the first end of the first reverse conducting type full-control switch unit, the third end of the third switch unit is connected with the first end of the first energy storage unit, the second end of the third switch unit is connected with the second end of the second reverse conducting type full-control switch unit, the fourth end of the third switch unit is connected with the second end of the second energy storage unit, and the second end of the first energy storage unit is connected with the first end of the second energy storage unit and serves as the fifth port of the power electronic building block;
when the first end of the third switching unit is conducted with the third end of the third switching unit and the second end of the third switching unit is conducted with the fourth end of the third switching unit, the first state of the third switching unit is achieved; when the first end of the third switching unit and the third end of the third switching unit are turned off, and the second end of the third switching unit and the fourth end of the third switching unit are turned off, the state is the second state of the third switching unit.
Preferably, the first reverse-conducting full-control switch unit comprises a first NMOS transistor and a first diode connected in anti-parallel, and the second reverse-conducting full-control switch unit comprises a second NMOS transistor and a second diode connected in anti-parallel;
a grid electrode of the first NMOS tube is used as a control end of the first reverse conducting type full control switch unit, a source electrode of the first NMOS tube is connected with an anode of the first diode and is used as a second end of the first reverse conducting type full control switch unit, and a drain electrode of the first NMOS tube is connected with a cathode of the first diode and is used as a first end of the first reverse conducting type full control switch unit; the grid electrode of the second NMOS tube is used as the control end of the second reverse conducting type full control switch unit, the source electrode of the second NMOS tube is connected with the anode of the second diode and is used as the second end of the second reverse conducting type full control switch unit, and the drain electrode of the second NMOS tube is connected with the cathode of the second diode and is used as the first end of the second reverse conducting type full control switch unit.
Preferably, the first energy storage unit is a first capacitor or a first battery; the second energy storage unit is a second capacitor or a second battery;
when the first energy storage unit is the first capacitor, a first end of the first capacitor is used as a first end of the first energy storage unit, a second end of the first capacitor is used as a second end of the first energy storage unit, when the first energy storage unit is the first battery, an anode of the first battery is used as the first end of the first energy storage unit, and a cathode of the first battery is used as the second end of the first energy storage unit;
when the second energy storage unit is the second capacitor, the first end of the second capacitor is used as the first end of the second energy storage unit, the second end of the second capacitor is used as the second end of the second energy storage unit, when the second energy storage unit is the second battery, the anode of the second battery is used as the first end of the second energy storage unit, and the cathode of the second battery is used as the second end of the second energy storage unit.
Preferably, the second switch unit is a relay, a first controlled end of the relay is used as a first end of the second switch unit, a second controlled end of the relay is used as a second end of the second switch unit, and the on and off of the controlled loop of the relay are controlled by controlling the on and off of the control loop of the relay.
Preferably, the protection circuit further includes a driving protection circuit, which is connected to the first reverse-conducting full-control switch unit and the second reverse-conducting full-control switch unit, respectively, and is configured to control a state of the first reverse-conducting full-control switch unit and a state of the second reverse-conducting full-control switch unit through a received control signal.
Preferably, the power electronic building blocks are applied to a buck conversion circuit, and the buck conversion circuit comprises a first power electronic building block and a second power electronic building block;
a first port of the first power electronic building block is connected with a positive electrode of a first power supply, a second port of the first power electronic building block is respectively connected with a negative electrode of the first power supply and a second port of the second power electronic building block, and a third port of the first power electronic building block is connected with a fifth port of the second power electronic building block; a fifth port of the second power electronic building block is connected with a first end of a first load, and a second port of the second power electronic building block is connected with a second end of the first load;
a first switch unit in the first power electronic building block is in a first state; a second switch unit in the first power electronic building block is in an off state, and a third switch unit in the first power electronic building block is in a first state; a third switching unit in the second power electronic building block is in a first state.
Preferably, the power electronic building blocks are applied to a boost converter circuit, and the boost converter circuit comprises a third power electronic building block and a fourth power electronic building block;
the first port of the third power electronic building block is connected with the first end of a second load, the second port of the third power electronic building block is respectively connected with the second end of the second load and the second port of the fourth power electronic building block, and the third port of the third power electronic building block is connected with the fifth port of the fourth power electronic building block; and a fifth port of the fourth power electronic building block is connected with the anode of a second power supply, and a second port of the fourth power electronic building block is connected with the cathode of the second power supply.
A first switch unit in the third power electronic building block is in a first state, a second switch unit in the third power electronic building block is in an off state, and a third switch unit in the third power electronic building block is in the first state; a third switching unit in the fourth power electronic building block is in a first state.
Preferably, the power electronic building blocks are applied to a DC-DC conversion circuit, which includes a fifth power electronic building block and a sixth power electronic building block;
a first port of the fifth power electronic building block is used as a first input end of the DC-DC conversion circuit, a second port of the fifth power electronic building block is used as a second input end of the DC-DC conversion circuit, a third port of the fifth power electronic building block is connected with a fourth port of the sixth power electronic building block or a third port of the sixth power electronic building block, the first port of the sixth power electronic building block is used as a first output end of the DC-DC conversion circuit, and the second port of the sixth power electronic building block is used as a second output end of the DC-DC conversion circuit;
a first switch unit in the fifth power electronic building block is in a first state, a second switch unit in the fifth power electronic building block is in an off state, and a third switch unit in the fifth power electronic building block is in the first state; the first switch unit in the sixth power electronic building block is in a first state, the second switch unit in the sixth power electronic building block is in a conducting state, and the third switch unit in the sixth power electronic building block is in the first state.
Preferably, the power electronic blocks are applied to a 3L-NPC circuit, and the 3L-NPC circuit comprises a seventh power electronic block, an eighth power electronic block and a ninth power electronic block;
a third port of the seventh power electronic building block or a fourth port of the seventh power electronic building block is connected with a first port of the ninth power electronic building block, a second port of the seventh power electronic building block is connected with a first port of the eighth power electronic building block, and a third port of the eighth power electronic building block or a fourth port of the eighth power electronic building block is connected with a second port of the ninth power electronic building block;
a first switch unit in the seventh power electronic building block is in a first state, a second switch unit in the seventh power electronic building block is in a conducting state, and a third switch unit in the seventh power electronic building block is in the first state; a first switch unit in the eighth power electronic building block is in a first state, a second switch unit in the eighth power electronic building block is in a conducting state, and a third switch unit in the eighth power electronic building block is in the first state; the first switch unit in the ninth power electronic building block is in a first state, the second switch unit in the ninth power electronic building block is in an off state, and the third switch unit in the ninth power electronic building block is in the first state.
Use the embodiment of the utility model provides a technical scheme, this reconfigurable power electronic building blocks of topology includes: the first reverse conducting type full-control switch unit, the second reverse conducting type full-control switch unit, the first switch unit, the second switch unit and the first inductance unit. In the power electronic building block, set connection relations are provided among all devices, manual connection is not needed, and the fact that a student independently designs a circuit and occupies a long time is avoided. The specific circuit topology structure presented by the power electronic building block depends on the states of the first reverse conducting type full-control switch unit and the second reverse conducting type full-control switch unit, and depends on the states of the first switch unit and the on-off state of the second switch unit, that is, students are allowed to independently design the circuit topology structure through the adjustment of the quantities. In addition, when a certain power electronic building block is used as a part of the whole experimental circuit, the external port of the certain power electronic building block is selected and connected by students independently. For example, after the first switch unit is controlled to be in the first state, the first port and the second port of the power electronic building block can be selected to be used as the commonly used half-bridge unit according to the connection relationship between the first reverse conducting type fully-controlled switch unit and the second reverse conducting type fully-controlled switch unit in the power electronic building block. If the second switch unit is in the off state and the first switch unit is in the first state, the third port and the fourth port of the power electronic building block are selected to be used as inductors. In conclusion, the power electronic building blocks with reconfigurable topology allow students to independently participate in the design of circuits, the operation experience of designing the circuits by the students is stimulated, meanwhile, the students are very convenient to build the circuits, and the problems that the circuits are not conveniently modified due to long time occupation and circuit errors of the independently designed circuits by the students can be solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a power electronic building block of the present invention;
FIG. 2 is a schematic diagram of a power electronic block in one embodiment;
FIG. 3 is a schematic view of another embodiment of a power electronic block for a particular application;
FIG. 4 is a schematic diagram of the external interface of the power electronic block in one embodiment;
fig. 5 is a schematic view of another structure of the power electronic building block of the present invention;
fig. 6 is a schematic view of a topological structure of the power electronic building block applied to the buck conversion circuit;
FIG. 7 is a schematic diagram of a port connection between the first power electronic block and the second power electronic block of FIG. 6;
fig. 8 is a schematic view of a topology of a power electronic building block applied to a boost converter circuit;
fig. 9 is a schematic view of a topology of a power electronic building block applied to a DC-DC conversion circuit;
fig. 10 is a schematic view of a topology of the power electronic building block applied to a T-type three-level structure;
FIG. 11 is a schematic diagram of a port connection between two of the power electronic bricks of FIG. 10;
fig. 12 is a schematic diagram of a topology of a power electronic building block applied to a 3L-NPC circuit.
Detailed Description
The core of the utility model is to provide a power electronic building blocks allows the student independently to participate in the design of circuit, has aroused the operation of student design circuit and has experienced, and it is very convenient again when putting up the circuit that the student independently designs the circuit simultaneously, long overlength when can avoiding the student to occupy independently designing the circuit, the inconvenient problem of modification of circuit error.
In order to make the technical field better understand the solution of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings and the detailed description. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a power electronic building block of the present invention, the power electronic building block includes: a first reverse conducting type full-control switch unit 10, a second reverse conducting type full-control switch unit 20, a first switch unit 30, a second switch unit 40 and a first inductance unit 50;
a first end of the first reverse conducting type full-control switch unit 10 is used as a first port of the power electronic building block, and a second end is used as a fourth port of the power electronic building block; a first end and a second end of the first switch unit 30 are both connected with a second end of the first reverse conducting type full-control switch unit 10, a third end of the first switch unit 30 is connected with a second end of the second reverse conducting type full-control switch unit 20 and serves as a second port of the power electronic building block, a fourth end of the first switch unit 30 is respectively connected with a first end of the second reverse conducting type full-control switch unit 20, a first end of the first inductance unit 50 and a first end of the second switch unit 40, and a second end of the second switch unit 40 is connected with a second end of the first inductance unit 50 and serves as a third port of the power electronic building block;
the specific device configurations of the first fully-controlled reverse-conducting switch unit 10 and the second fully-controlled reverse-conducting switch unit 20 can be set and adjusted as required, for example, in the embodiment of fig. 2, the first fully-controlled reverse-conducting switch unit 10 includes a first NMOS Q1 and a first diode D1 connected in anti-parallel, the second fully-controlled reverse-conducting switch unit 20 includes a second NMOS Q2 and a second diode D2 connected in anti-parallel,
specifically, the gate of the first NMOS transistor Q1 is used as the control terminal of the first reverse conducting type full-control switch unit 10, the source of the first NMOS transistor Q1 is connected to the anode of the first diode D1 and is used as the second terminal of the first reverse conducting type full-control switch unit 10, and the drain of the first NMOS transistor Q1 is connected to the cathode of the first diode D1 and is used as the first terminal of the first reverse conducting type full-control switch unit 10; the gate of the second NMOS transistor Q2 is used as the control terminal of the second reverse conducting type fully-controlled switch unit 20, the source of the second NMOS transistor Q2 is connected to the anode of the second diode D2 and is used as the second terminal of the second reverse conducting type fully-controlled switch unit 20, and the drain of the second NMOS transistor Q2 is connected to the cathode of the second diode D2 and is used as the first terminal of the second reverse conducting type fully-controlled switch unit 20.
As in the embodiment of fig. 3, an IGBT is used as the fully-controlled switch in the reverse-conducting fully-controlled switch unit, and in addition, fully-controlled switches such as MCT, IGCT, and shi may also be used in practical applications. The diode that is connected with full accuse switch reverse parallel can be the body diode of full accuse switch self, also can be external diode, does not all influence the utility model discloses an implement.
The first switch unit 30 has two states, wherein the first state of the first switch unit 30 is when the second terminal of the first switch unit 30 is connected to the fourth terminal of the first switch unit 30, and the first terminal of the first switch unit 30 is disconnected from the third terminal of the first switch unit 30. Accordingly, when the second terminal of the first switch unit 30 is turned off and the first terminal of the first switch unit 30 is turned on, the second state of the first switch unit 30 is set as the second state of the first switch unit 30. The first switching unit 30 functionally corresponds to a double pole single throw switch. It can be seen that by switching the state of the first switching element 30, the circuit connections inside the power electronic building block are changed, and thus different topologies are reconstructed.
In addition, still include first inductance unit 50 and the second switch unit 40 of being connected in parallel with it in the power electronic building blocks, first inductance unit 50 can include an inductive element or be the combination of a plurality of inductive elements, can be adjustable inductance, fixed inductance etc. all do not influence the utility model discloses an implement. For example, in fig. 2 and 3, the first inductance unit 50 includes only one fixed inductance Lr. The second switch unit 40 is functionally equivalent to a single-pole single-throw switch, and when the second switch unit is turned on, the first inductor unit 50 is short-circuited, and when the second switch unit is turned off, the first inductor unit 50 can be connected into a circuit for use.
It can be seen that when the power electronic building block is connected into the circuit, the setting adjustment of three steps can be carried out.
One is to select the state of the first switch unit 30 and the on/off state of the second switch unit 40;
the second is to define a driving signal sent by the controller, and the states of the first reverse conducting type full-control switch unit 10 and the second reverse conducting type full-control switch unit 20 can be adjusted by the driving signal, and the driving signal is usually a PWM signal, but may be a driving signal in other forms in a specific situation. Fig. 4 is a schematic diagram of an external interface of the power electronic building block of the present application, and the controller may send a driving signal to the first reverse conducting type fully-controlled switch unit 10 through the interface of PWM1 to control the first reverse conducting type fully-controlled switch unit 10. Accordingly, the second fully-controlled reverse conducting switching unit 20 can be controlled by sending a driving signal to the second fully-controlled reverse conducting switching unit 20 through the interface of PWM 2. For example, the IGBTs in the first fully-controlled reverse conducting switch unit 10 and the second fully-controlled reverse conducting switch unit 20 are driven by two PWM signals, so that the power electronic building block is used as a half-bridge component. And if the two driving signals control the IGBTs in the first reverse conducting type full-control switch unit 10 and the second reverse conducting type full-control switch unit 20 to be turned off, the power electronic building block is used as a half diode bridge.
And thirdly, selecting the ports of the power electronic building block to be connected with the outside, wherein the power electronic building block has a first port, a second port, a third port and a fourth port, which are sequentially denoted as a, B, C and D in fig. 2 and 3.
The application provides a reconfigurable power electronics building blocks of topology includes: the circuit comprises a first reverse conducting type full-control switch unit 10, a second reverse conducting type full-control switch unit 20, a first switch unit 30, a second switch unit 40 and a first inductance unit 50. In the power electronic building block, set connection relations are provided among all devices, manual connection is not needed, and the fact that a student independently designs a circuit and occupies a long time is avoided. The specific circuit topology presented by the power electronic building block of the present application depends on the states of the first reverse conducting type fully-controlled switch unit 10 and the second reverse conducting type fully-controlled switch unit 20, and on the states of the first switch unit 30 and the on/off state of the second switch unit 40, that is, the students are allowed to autonomously design the circuit topology by adjusting these quantities. In addition, when a certain power electronic building block is used as a part of the whole experimental circuit, the external port of the certain power electronic building block is selected and connected by students independently. For example, after controlling the first switch element 30 to be in the first state, as can be known from the connection relationship between the first fully-controlled switch element 10 of the reverse conducting type and the second fully-controlled switch element 20 of the reverse conducting type in the power electronic building block, the first port and the second port of the power electronic building block can be selected as the commonly used half-bridge elements. For example, when the second switch unit 40 is in the off state and the first switch unit 30 is in the first state, the third port and the fourth port of the power electronic building block can be selected to be used as inductors. In conclusion, the power electronic building blocks with reconfigurable topology allow students to independently participate in the design of circuits, the operation experience of designing the circuits by the students is stimulated, meanwhile, the students are very convenient to build the circuits, and the problems that the circuits are not conveniently modified due to long time occupation and circuit errors of the independently designed circuits by the students can be solved.
In a specific embodiment of the present invention, referring to fig. 5, the method further includes: a third switching unit 60, a first energy storage unit 70 and a second energy storage unit 80;
a first end of the third switching unit 60 is connected with a first end of the first reverse conducting type full-control switching unit 10, a third end of the third switching unit 60 is connected with a first end of the first energy storage unit 70, a second end of the third switching unit 60 is connected with a second end of the second reverse conducting type full-control switching unit 20, a fourth end of the third switching unit 60 is connected with a second end of the second energy storage unit 80, and a second end of the first energy storage unit 70 is connected with a first end of the second energy storage unit 80 and serves as a fifth port of the power electronic building block;
when the first end of the third switching unit 60 is conducted with the third end of the third switching unit 60, and the second end of the third switching unit 60 is conducted with the fourth end of the third switching unit 60, the first state of the third switching unit 60 is assumed; when the first terminal of the third switching unit 60 and the third terminal of the third switching unit 60 are turned off, and the second terminal of the third switching unit 60 and the fourth terminal of the third switching unit 60 are turned off, the state is the second state of the third switching unit 60.
Considering that the energy storage component is a component that is often required to be used in power electronic experiments in addition to the reverse conducting type fully-controlled switch unit and the inductive component, the power electronic building block in this embodiment includes the first energy storage unit 70, the second energy storage unit 80 and the third switch unit 60. When the third switching unit 60 is in the first state, the first energy storage unit 70 and/or the second energy storage unit 80 can be connected to the circuit. The fifth port is denoted N in this application and is usually in the circuit as a neutral point.
Common energy storage components are capacitors and batteries, that is, the first energy storage unit 70 may be a first capacitor or a first battery; the second energy storage unit 80 may be a second capacitor or a second battery.
When the first energy storage unit 70 is a first capacitor, a first end of the first capacitor is used as a first end of the first energy storage unit 70, a second end of the first capacitor is used as a second end of the first energy storage unit 70, when the first energy storage unit 70 is a first battery, an anode of the first battery is used as the first end of the first energy storage unit 70, and a cathode of the first battery is used as the second end of the first energy storage unit 70;
when the second energy storage unit 80 is a second capacitor, the first end of the second capacitor is used as the first end of the second energy storage unit 80, the second end of the second capacitor is used as the second end of the second energy storage unit 80, when the second energy storage unit 80 is a second battery, the anode of the second battery is used as the first end of the second energy storage unit 80, and the cathode of the second battery is used as the second end of the second energy storage unit 80.
The capacitor may be a polar capacitor or a non-polar capacitor, for example, in the embodiments of fig. 2 and 3, the first energy storage unit 70 and the second energy storage unit 80 are both polar capacitors, which are respectively denoted as C1 and C2. When selecting for the battery, can be primary battery also can be secondary battery, all do not influence the utility model discloses an implement.
The first switch unit 30, the second switch unit 40 and the third switch unit 60 are sequentially labeled as K1, K2 and K3 in fig. 2 and 3. In fig. 2 and 3, the first switching unit 30 and the third switching unit 60 are both in the first state, and the second switching unit 40 is in the off state.
In practical applications, the three switching units may be implemented using mechanical switches such as relays, or using semiconductor controllable switches such as MOSFETs, IGBTs, etc. Considering that the switching speed of the relay is slow, but the on-resistance and the parasitic capacitance are small, and the power electronic building block does not switch too frequently when switching the topology, that is, the three switching units do not need to be operated frequently, the relay can be generally selected to realize the three switching units. For example, when the second switch unit 40 is a relay, the first controlled terminal of the relay may be used as the first terminal of the second switch unit 40, and the second controlled terminal of the relay may be used as the second terminal of the second switch unit 40, so as to control the on and off of the controlled loop of the relay by controlling the on and off of the control loop of the relay. In the case of the first switching unit 30 or the third switching unit 60, two relays or a relay with a dual controlled loop may be used.
It should be noted that, when the on/off of the control circuit of the relay is controlled, the control circuit may be controlled by sending an electrical signal, or may be controlled by manually adjusting a mechanical structure. For convenience of description, the second switch unit 40 is taken as an example, for example, one end of the transmission part is connected to the key or the shift lever, and the other end of the transmission part is connected to the control circuit of the relay, so that the transmission part is actuated by pressing the key or shifting the shift lever, and the transmission part closes the control circuit of the relay. As shown in the embodiment of fig. 4, the TX and RX interfaces input control signals, and the logic circuit built in the power electronic building block can receive the control signals, so that the logic circuit controls the on/off of the control loop of the relay according to the content of the control signals.
Of course, whether the first, second and third switch units are controlled by a mechanical structure or an electrical signal is a more conventional control method, so that a schematic diagram of the part of the control circuit or a schematic diagram of the mechanical structure is not given in the present application.
The utility model discloses an in a specific embodiment, still include, be connected with first contrary type of leading all-round switch unit 10 and the second is contrary type of leading all-round switch unit 20 respectively for through the drive protection circuit of the state of the first type of leading all-round switch unit 10 of control signal control that receives and the state of the second type of leading all-round switch unit 20 of control.
Specifically, the driving protection circuit generally receives the PWM control signal, and may perform preprocessing operations such as filtering and amplifying on the signal, and then output the signal to the control terminals of the first reverse conducting type fully-controlled switch unit 10 and the second reverse conducting type fully-controlled switch unit 20.
It should be noted that, in practical applications, the structure of the power electronic building block generally selected is the structure with three switch units shown in fig. 5. Specifically, as shown in fig. 2 or fig. 3, each of the power electronic blocks in the subsequent embodiments is a power electronic block having a structure with three switch units.
Referring to fig. 6, the power electronic building blocks are applied to a buck converter circuit, and the buck converter circuit includes a first power electronic building block and a second power electronic building block;
a first port of the first power electronic building block is connected with the positive electrode of a first power supply VCC1, a second port of the first power electronic building block is respectively connected with the negative electrode of the first power supply VCC1 and a second port of the second power electronic building block, and a third port of the first power electronic building block is connected with a fifth port of the second power electronic building block; a fifth port of the second power electronic brick is connected with a first end of a first load R1, and a second port of the second power electronic brick is connected with a second end of a first load R1;
fig. 7 shows a schematic diagram of a port connection between a first power electronic block and a second power electronic block.
A first switch unit in the first power electronic building block is in a first state; a second switch unit in the first power electronic building block is in an off state, and a third switch unit in the first power electronic building block is in a first state; the third switching unit in the second power electronic building block is in the first state.
It should be noted that the buck conversion circuit in this embodiment is only one specific buck conversion circuit, and in other cases, other types of buck conversion circuits may be connected by a plurality of power electronic bricks and other components. The voltage reduction type conversion circuit realizes voltage reduction by controlling a first reverse conducting type full-control switch unit in a first power electronic building block and a second reverse conducting type full-control switch unit in the first power electronic building block through a driving signal, specifically, Q1 in fig. 6 is controlled to be conducted, when Q2 is turned off, an inductor Lr stores energy, Q1 is controlled to be turned off, and when Q2 is turned on, the inductor Lr releases energy. And in a switching period, when the charge of the capacitor in the second power electronic building block is higher than the discharge charge, the voltage of the capacitor rises until the charge-discharge balance is achieved, and correspondingly, when the discharge charge in a period is higher than the charge, the voltage of the capacitor gradually falls.
Except for the step-down conversion circuit, the step-up conversion circuit and the step-up and step-down conversion circuit are circuits which are often needed to be used in power electronic experiments, and the power electronic module can be constructed.
For example, in an embodiment of the present invention, referring to fig. 8, the power electronic building block is applied to a boost converter circuit, and the boost converter circuit includes a third power electronic building block and a fourth power electronic building block;
a first port of the third power electronic building block is connected with a first end of the second load R2, a second port of the third power electronic building block is connected with a second end of the second load R2 and a second port of the fourth power electronic building block, respectively, and a third port of the third power electronic building block is connected with a fifth port of the fourth power electronic building block; the fifth port of the fourth power electronic brick is connected to the positive terminal of a second power supply VCC2, and the second port of the fourth power electronic brick is connected to the negative terminal of a second power supply VCC 2.
A first switch unit in the third power electronic building block is in a first state, a second switch unit in the third power electronic building block is in an off state, and a third switch unit in the third power electronic building block is in the first state; a third switching unit in the fourth power electronic building block is in the first state.
As shown in fig. 9, the power electronic blocks are applied to a DC-DC conversion circuit, and the DC-DC conversion circuit includes a fifth power electronic block and a sixth power electronic block, and the purpose that the output voltage is higher or lower than the input voltage can be achieved by adjusting the duty ratio.
Specifically, a first port of the fifth power electronic building block is used as a first input end of the DC-DC conversion circuit, a second port of the fifth power electronic building block is used as a second input end of the DC-DC conversion circuit, a third port of the fifth power electronic building block is connected to a fourth port of the sixth power electronic building block or a third port of the sixth power electronic building block, the first port of the sixth power electronic building block is used as a first output end of the DC-DC conversion circuit, and the second port of the sixth power electronic building block is used as a second output end of the DC-DC conversion circuit;
a first switch unit in the fifth power electronic building block is in a first state, a second switch unit in the fifth power electronic building block is in an off state, and a third switch unit in the fifth power electronic building block is in the first state; the first switch unit in the sixth power electronic building block is in the first state, the second switch unit in the sixth power electronic building block is in the conducting state, and the third switch unit in the sixth power electronic building block is in the first state.
It should be noted that the DC-DC conversion circuit in this embodiment may also be designed into a T-type three-level structure, that is, two power electronic blocks in fig. 10 are used to replace the fifth power electronic block in fig. 9, and a port connection diagram of the two power electronic blocks in fig. 10 can be shown in fig. 11, where components in the dashed box in fig. 10 are components in the power electronic block number one in fig. 11, and the rest are components in the power electronic block number two in fig. 11.
The circuit topology in the foregoing embodiments all requires two power electronic blocks, and in other embodiments, more power electronic blocks may participate in the construction of the circuit topology, for example, in a specific embodiment of the present invention, referring to fig. 12, the power electronic blocks are applied to a 3L-NPC circuit, and the 3L-NPC circuit includes a seventh power electronic block, an eighth power electronic block, and a ninth power electronic block.
A third port of the seventh power electronic building block or a fourth port of the seventh power electronic building block is connected with a first port of the ninth power electronic building block, a second port of the seventh power electronic building block is connected with a first port of the eighth power electronic building block, and a third port of the eighth power electronic building block or a fourth port of the eighth power electronic building block is connected with a second port of the ninth power electronic building block;
a first switch unit in the seventh power electronic building block is in a first state, a second switch unit in the seventh power electronic building block is in a conducting state, and a third switch unit in the seventh power electronic building block is in the first state; a first switch unit in the eighth power electronic building block is in a first state, a second switch unit in the eighth power electronic building block is in a conducting state, and a third switch unit in the eighth power electronic building block is in the first state; the first switch unit in the ninth power electronic building block is in the first state, the second switch unit in the ninth power electronic building block is in the off state, and the third switch unit in the ninth power electronic building block is in the first state.
In the foregoing embodiment, the step-down conversion circuit, the step-up conversion circuit 3L-NPC circuit, and the like are taken as examples to illustrate the construction manner of the power electronic building block, and in other specific cases, the power electronic building block may have other construction manners, table one is an example of the topology of the power electronic building block, and it should be noted that table one is listed as a common topology, and does not represent all the topology forms. For example, when the power electronic building block needs to be selected to be used as a capacitor, the ports may be selected to be a and N ports or B and N ports, in addition to the selection of the ports a and B in table one. In table one, 0 of K1 indicates that the first switching unit 30 is in the first state, 1 of K1 indicates that the first switching unit 30 is in the second state, 0 of K2 indicates that the second switching unit 40 is in the off state, 1 of K2 indicates that the second switching unit 40 is in the on state, 0 of K3 indicates that the third switching unit 60 is in the first state, and 1 of K3 indicates that the third switching unit 60 is in the second state. Hooking means that the port can be used as a port for external connection.
Table one: topological example of power electronic building block
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The principle and the implementation of the present invention are explained herein by applying specific examples, and the above descriptions of the embodiments are only used to help understand the technical solution and the core idea of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (10)
1. A power electronic toy, comprising: the circuit comprises a first reverse conducting type full-control switch unit, a second reverse conducting type full-control switch unit, a first switch unit, a second switch unit and a first inductance unit;
a first end of the first reverse conducting type full-control switch unit is used as a first port of the power electronic building block, and a second end of the first reverse conducting type full-control switch unit is used as a fourth port of the power electronic building block; the first end and the second end of the first switch unit are connected with the second end of the first reverse conducting type full-control switch unit, the third end of the first switch unit is connected with the second end of the second reverse conducting type full-control switch unit and serves as a second port of the power electronic building block, the fourth end of the first switch unit is connected with the first end of the second reverse conducting type full-control switch unit, the first end of the first inductance unit and the first end of the second switch unit respectively, and the second end of the second switch unit is connected with the second end of the first inductance unit and serves as a third port of the power electronic building block;
the second end of the first switch unit is connected with the fourth end of the first switch unit, and the first end of the first switch unit is in a first state when the first end of the first switch unit is disconnected with the third end of the first switch unit; and when the first end of the first switch unit is connected with the third end of the first switch unit, the first state of the first switch unit is the second state.
2. A power electronic brick according to claim 1, further comprising: the third switching unit is used for storing the first energy storage unit and the second energy storage unit;
the first end of the third switch unit is connected with the first end of the first reverse conducting type full-control switch unit, the third end of the third switch unit is connected with the first end of the first energy storage unit, the second end of the third switch unit is connected with the second end of the second reverse conducting type full-control switch unit, the fourth end of the third switch unit is connected with the second end of the second energy storage unit, and the second end of the first energy storage unit is connected with the first end of the second energy storage unit and serves as the fifth port of the power electronic building block;
when the first end of the third switching unit is conducted with the third end of the third switching unit and the second end of the third switching unit is conducted with the fourth end of the third switching unit, the first state of the third switching unit is achieved; when the first end of the third switching unit and the third end of the third switching unit are turned off, and the second end of the third switching unit and the fourth end of the third switching unit are turned off, the state is the second state of the third switching unit.
3. A power electronic building block according to claim 1, wherein the first fully-controlled reverse conducting switching element comprises a first NMOS transistor and a first diode connected in anti-parallel, and the second fully-controlled reverse conducting switching element comprises a second NMOS transistor and a second diode connected in anti-parallel;
a grid electrode of the first NMOS tube is used as a control end of the first reverse conducting type full control switch unit, a source electrode of the first NMOS tube is connected with an anode of the first diode and is used as a second end of the first reverse conducting type full control switch unit, and a drain electrode of the first NMOS tube is connected with a cathode of the first diode and is used as a first end of the first reverse conducting type full control switch unit; the grid electrode of the second NMOS tube is used as the control end of the second reverse conducting type full control switch unit, the source electrode of the second NMOS tube is connected with the anode of the second diode and is used as the second end of the second reverse conducting type full control switch unit, and the drain electrode of the second NMOS tube is connected with the cathode of the second diode and is used as the first end of the second reverse conducting type full control switch unit.
4. A power electronic brick according to claim 2, characterized in that the first energy storage element is a first capacitor or a first battery; the second energy storage unit is a second capacitor or a second battery;
when the first energy storage unit is the first capacitor, a first end of the first capacitor is used as a first end of the first energy storage unit, a second end of the first capacitor is used as a second end of the first energy storage unit, when the first energy storage unit is the first battery, an anode of the first battery is used as the first end of the first energy storage unit, and a cathode of the first battery is used as the second end of the first energy storage unit;
when the second energy storage unit is the second capacitor, the first end of the second capacitor is used as the first end of the second energy storage unit, the second end of the second capacitor is used as the second end of the second energy storage unit, when the second energy storage unit is the second battery, the anode of the second battery is used as the first end of the second energy storage unit, and the cathode of the second battery is used as the second end of the second energy storage unit.
5. The power electronic building block of claim 1, wherein the second switch unit is a relay, a first controlled terminal of the relay serves as a first terminal of the second switch unit, and a second controlled terminal of the relay serves as a second terminal of the second switch unit, and the on and off of a controlled loop of the relay are controlled by controlling the on and off of a control loop of the relay.
6. A power electronic building block according to claim 1, further comprising a driving protection circuit connected to the first fully-controlled reverse conducting switch unit and the second fully-controlled reverse conducting switch unit, respectively, for controlling the state of the first fully-controlled reverse conducting switch unit and controlling the state of the second fully-controlled reverse conducting switch unit by means of received control signals.
7. A power electronic brick according to claim 2, characterized in that the power electronic brick is applied in a buck converter circuit comprising a first power electronic brick and a second power electronic brick;
a first port of the first power electronic building block is connected with a positive electrode of a first power supply, a second port of the first power electronic building block is respectively connected with a negative electrode of the first power supply and a second port of the second power electronic building block, and a third port of the first power electronic building block is connected with a fifth port of the second power electronic building block; a fifth port of the second power electronic building block is connected with a first end of a first load, and a second port of the second power electronic building block is connected with a second end of the first load;
a first switch unit in the first power electronic building block is in a first state; a second switch unit in the first power electronic building block is in an off state, and a third switch unit in the first power electronic building block is in a first state; a third switching unit in the second power electronic building block is in a first state.
8. A power electronic building block according to claim 2, wherein the power electronic building block is used in a step-up converter circuit comprising a third power electronic building block and a fourth power electronic building block;
the first port of the third power electronic building block is connected with the first end of a second load, the second port of the third power electronic building block is respectively connected with the second end of the second load and the second port of the fourth power electronic building block, and the third port of the third power electronic building block is connected with the fifth port of the fourth power electronic building block; a fifth port of the fourth power electronic building block is connected with the positive electrode of a second power supply, and a second port of the fourth power electronic building block is connected with the negative electrode of the second power supply;
a first switch unit in the third power electronic building block is in a first state, a second switch unit in the third power electronic building block is in an off state, and a third switch unit in the third power electronic building block is in the first state; a third switching unit in the fourth power electronic building block is in a first state.
9. A power electronic brick according to claim 2, characterized in that the power electronic brick is applied in a DC-DC converter circuit comprising a fifth power electronic brick and a sixth power electronic brick;
a first port of the fifth power electronic building block is used as a first input end of the DC-DC conversion circuit, a second port of the fifth power electronic building block is used as a second input end of the DC-DC conversion circuit, a third port of the fifth power electronic building block is connected with a fourth port of the sixth power electronic building block or a third port of the sixth power electronic building block, the first port of the sixth power electronic building block is used as a first output end of the DC-DC conversion circuit, and the second port of the sixth power electronic building block is used as a second output end of the DC-DC conversion circuit;
a first switch unit in the fifth power electronic building block is in a first state, a second switch unit in the fifth power electronic building block is in an off state, and a third switch unit in the fifth power electronic building block is in the first state; the first switch unit in the sixth power electronic building block is in a first state, the second switch unit in the sixth power electronic building block is in a conducting state, and the third switch unit in the sixth power electronic building block is in the first state.
10. A power electronic brick according to claim 2, characterized in that the power electronic brick is applied in a 3L-NPC circuit, said 3L-NPC circuit comprising a seventh power electronic brick, an eighth power electronic brick and a ninth power electronic brick;
a third port of the seventh power electronic building block or a fourth port of the seventh power electronic building block is connected with a first port of the ninth power electronic building block, a second port of the seventh power electronic building block is connected with a first port of the eighth power electronic building block, and a third port of the eighth power electronic building block or a fourth port of the eighth power electronic building block is connected with a second port of the ninth power electronic building block;
a first switch unit in the seventh power electronic building block is in a first state, a second switch unit in the seventh power electronic building block is in a conducting state, and a third switch unit in the seventh power electronic building block is in the first state; a first switch unit in the eighth power electronic building block is in a first state, a second switch unit in the eighth power electronic building block is in a conducting state, and a third switch unit in the eighth power electronic building block is in the first state; the first switch unit in the ninth power electronic building block is in a first state, the second switch unit in the ninth power electronic building block is in an off state, and the third switch unit in the ninth power electronic building block is in the first state.
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| CN201921521685.9U CN210606254U (en) | 2019-09-12 | 2019-09-12 | Power electronic building block |
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| CN201921521685.9U CN210606254U (en) | 2019-09-12 | 2019-09-12 | Power electronic building block |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110473452A (en) * | 2019-09-12 | 2019-11-19 | 苏州市职业大学 | A kind of power electronics building blocks |
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| CN110473452A (en) * | 2019-09-12 | 2019-11-19 | 苏州市职业大学 | A kind of power electronics building blocks |
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