Device for simulating ANPC topology loss established by test client based on half-bridge module
By designing a simulation test client based on a half-bridge module to construct an ANPC topology loss device, using a PCB board structure and variable inductor connection, the accuracy problem of loss assessment in three-level ANPC topologies is solved, improving test efficiency and result accuracy. It is particularly suitable for MW-level photovoltaic inverters.
Patent Information
- Application Number
- CN202423244939.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2034-12-27
AI Technical Summary
Existing technologies struggle to accurately assess the losses of half-bridge modules in three-level ANPC topologies, especially in MW-level photovoltaic inverters, where loss assessment testing is challenging and the results of multi-parallel testing are inaccurate.
Design a device to simulate the loss of an ANPC topology based on a half-bridge module for a test client. The device adopts a PCB board structure and installs multiple power modules and signal modules. By changing the length of the variable inductor connection line, different client test conditions are simulated. The ANPC topology is built using a 62mm half-bridge module for power testing.
It achieves more accurate loss assessment, the test results are closer to actual use, the test efficiency is improved, the current sharing adjustment in whole system testing is avoided, and better drive parameters and temperature rise assessment are provided.
Smart Images
Figure CN223955692U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to ANPC topology loss test technical field, more specifically relates to a kind of device that simulates test client is based on half-bridge module group ANPC topology loss. BACKGROUND
[0002] Three-level ANPC is a kind of high-performance three-level topology structure, has wide application in energy field, including photovoltaic inverter, energy storage inverter etc.;And common three-level ANPC is basically parallel use on different power applications, and large power model can even use three parallel or even four parallel output, which brings certain difficulty to the loss evaluation test in early stage. In MW photovoltaic inverter, generally selected large current half-bridge IGBT module is used to build ANPC topology. Using 3 half-bridge modules can build an ANPC topology.
[0003] Two-level half-bridge module direct test cannot evaluate the loss of three-level module built using half-bridge module, mainly due to the change of commutation loop in three-level ANPC topology, which brings difference in loss, i.e. the loss result of the same module is different in different positions of ANPC topology.
[0004] Therefore, a kind of device that simulates test client is based on half-bridge module group ANPC topology loss is designed to overcome the above problems. UTILITY MODEL CONTENTS
[0005] The utility model aims at overcoming the deficiencies in the prior art, and provides a kind of device that simulates test client is based on half-bridge module group ANPC topology loss, which is simple and reasonable in structure, and more accurately evaluates the loss of client.
[0006] The utility model is realized by the following technical solutions: a kind of device that simulates test client is based on half-bridge module group ANPC topology loss, the device is PCB board, multiple groups of power modules are respectively installed on the PCB board, multiple groups of power modules are arranged in partition, and one signal module is respectively fixedly installed on one side of each group of power modules on the PCB board by connecting piece, the power module and signal module are respectively as the power end and signal end of PCB board, multiple groups of power interfaces are also installed on the PCB board, and each group of power interface is used to respectively connect power positive and negative to the power end and signal end on the PCB board to power supply.
[0007] As preferred: the power module is three groups, respectively first power module, second power module and third power module, the first power module, the second power module and the third power module are all composed of a group of two-level IGBT module, and are first IGBT module, second IGBT module and third IGBT module in turn.
[0008] As preferred: the first IGBT module is composed of a first IGBT transistor T1, a first diode D1 and a fifth IGBT transistor T5, a fifth diode D5, the second IGBT module is composed of a second IGBT transistor T2, a second diode D2 and a third IGBT transistor T3, a third diode D3, and the third IGBT module is composed of a fourth IGBT transistor T4, a fourth diode D4 and a sixth IGBT transistor T6, a sixth diode D6, the collector of each group of IGBT transistors is electrically connected with the cathode of each group of diodes, and the emitter of the IGBT transistor is electrically connected with the anode of the diode.
[0009] As preferred: the first IGBT transistor T1, the first diode D1, the second IGBT transistor T2, the second diode D2, the third IGBT transistor T3, the third diode D3 and the fourth IGBT transistor T4, the fourth diode D4 are sequentially connected in circuit, the first IGBT transistor T1 and the first diode D1 are connected with the positive pole P+ of the three-level power supply input at one end away from the second IGBT transistor T2 and the second diode D2, the fourth IGBT transistor T4 and the fourth diode D4 are connected with the negative pole P- of the three-level power supply input at one end away from the third IGBT transistor T3 and the third diode D3, a branch is connected in parallel between the first IGBT transistor T1 and the second IGBT transistor T2 and between the third IGBT transistor T3 and the fourth IGBT transistor T4, the fifth IGBT transistor T5, the fifth diode D5, the sixth IGBT transistor T6 and the sixth diode D6 are respectively arranged on the branch, the P1 point is arranged at the middle position of the branch between the fifth IGBT transistor T5 and the sixth IGBT transistor T6, and the P1 point and the three-level zero level P0 are connected as a variable inductance, the P0 to P1 is a common part of all test circuits of the ANPC, and the stray inductance of the whole circuit can be changed by changing the length of the connecting line of the P0 to P1, so that the test condition of different clients can be changed.
[0010] As preferred: the line between the second IGBT transistor T2 and the third IGBT transistor T3 is externally connected with alternating current AC.
[0011] As preferred: the connecting piece is a screw, and the screw is locked and mounted.
[0012] The utility model discloses the beneficial effects are as follows:
[0013] The device for simulating test client based on half-bridge module to build ANPC topology loss can more accurately evaluate the client loss, the utility model discloses a power test board of the ANPC topology of the half-bridge module based on 62mm, uses the variable impedance power board of ANPC topology to simulate client test double pulse, and the actual measurement loss data is closer to the client test condition, is more convenient than multiple parallel test, and the efficiency is higher, and the test result is closer to the result in actual use of module, can avoid the current sharing regulation in whole machine system test in the test process, and it is more helpful for subsequent evaluation driving parameter, temperature rise and the like. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 It is device structure schematic diagram of the utility model.
[0015] Figure 2 It is module pipe position connection diagram of the utility model.
[0016] Figure 3 It is circuit diagram of the utility model.
[0017] Figure 4 It is principle diagram of the utility model. DETAILED DESCRIPTION
[0018] In order to make those skilled in the art more clearly understand the purpose, technical scheme and advantages of the utility model, the utility model is further described below in conjunction with the drawings and examples.
[0019] In the description of the utility model, it is understood that the orientation or position relationship indicated by "up", "down", "left", "right", "inner", "outer", "horizontal", "vertical" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model, and does not indicate or imply that the indicated device or element must have a particular orientation, so it cannot be understood as a limitation on the utility model.
[0020] The utility model will be described in detail below in conjunction with the drawings: as Figure 1 A kind of device for simulating test client based on half-bridge module to build ANPC topology loss, the device is PCB board 1, multiple groups of power modules 2 are respectively installed on the PCB board 1, multiple groups of power modules 2 are arranged in partition, and one signal module 4 is respectively locked and installed on the PCB board by screw on one side of each group of power modules 2, the power module 2 and signal module 4 are respectively as the power end and signal end of PCB board 1, multiple groups of power supply interfaces 5 are also installed on the PCB board 1, and each group of power supply interface 5 is used to respectively connect power supply positive and negative to the power end and signal end on the PCB board 1 to power supply.
[0021] As Figure 2The diagram shows the module mounting connections. The dotted line represents the PCB board. The module's power terminals are directly screwed onto the PCB board, while the signal terminals are externally supplied for driving and testing. Figure 2 In this context, H represents a high level and L represents a low level.
[0022] like Figure 3 As shown, the power modules are in three groups, namely the first power module 6, the second power module 7 and the third power module 8. Each of the first power module 6, the second power module 7 and the third power module 8 consists of a group of two-level IGBT modules, namely the first IGBT module 9, the second IGBT module 10 and the third IGBT module 11, respectively.
[0023] The first IGBT module 9 consists of a first IGBT transistor T1, a first diode D1, a fifth IGBT transistor T5, and a fifth diode D5. The second IGBT module 10 consists of a second IGBT transistor T2, a second diode D2, a third IGBT transistor T3, and a third diode D3. The third IGBT module 11 consists of a fourth IGBT transistor T4, a fourth diode D4, a sixth IGBT transistor T6, and a sixth diode D6. The collector of each IGBT transistor is electrically connected to the cathode of each diode, and the emitter of the IGBT transistor is electrically connected to the anode of the diode.
[0024] The first IGBT transistor T1, the first diode D1, the second IGBT transistor T2, the second diode D2, the third IGBT transistor T3, the third diode D3 and the fourth IGBT transistor T4 and the fourth diode D4 are connected in sequence, the first IGBT transistor T1 and the first diode D1 are connected to the positive pole P+ of the three-level power supply input away from the second IGBT transistor T2 and the second diode D2, the fourth IGBT transistor T4 and the fourth diode D4 are connected to the negative pole P- of the three-level power supply input away from the third IGBT transistor T3 and the third diode D3, a branch 12 is connected in parallel between the first IGBT transistor T1 and the second IGBT transistor T2 and between the third IGBT transistor T3 and the fourth IGBT transistor T4, the fifth IGBT transistor T5 and the fifth diode D5 and the sixth IGBT transistor T6 and the sixth diode D6 are respectively arranged on the branch 12, the P1 point is arranged at the middle position of the branch 12 between the fifth IGBT transistor T5 and the sixth IGBT transistor T6, and the P1 point and the three-level zero level P0 are connected as a variable inductance connection, P0 to P1 is a common part of all test circuits of the ANPC, and the stray inductance of the whole circuit can be changed by changing the length of the connecting line of P0 to P1, so that the test situation of different clients can be changed. The line 3 between the second IGBT transistor T2 and the third IGBT transistor T3 is externally connected with alternating current AC. Figure 4 The utility model discloses a schematic diagram.
[0025] The utility model is based on the power test board of ANPC topology built by 62mm half bridge module. Using ANPC topology variable stray inductance power board can simulate customer end test double pulse, and the actually measured loss data is closer to customer end test situation, is more convenient than multiple parallel test, is higher in efficiency, and the test result is closer to the result of module in actual use. In the test process, current sharing regulation in the whole machine system test can be avoided, and it is more helpful for subsequent evaluation driving parameter, temperature rise and the like.
[0026] The specific embodiments described in the present application are only illustrative of the principles of the utility model and its effects, and are not used to limit the utility model. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the utility model. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the utility model should be covered by the claims of the utility model.
Claims
1. A device for simulating the losses of an ANPC topology built from half-bridge modules by a test client, the device being a PCB board (1), characterized in that: The PCB board (1) is respectively provided with a plurality of groups of power modules (2), the plurality of groups of power modules (2) are arranged in a partitioned manner, and one side of each group of power modules (2) is fixedly provided with a signal module (4) on the PCB board through a connecting piece; the power module (2) and the signal module (4) are respectively used as a power end and a signal end of the PCB board (1); and a plurality of groups of power supply interfaces (5) are further provided on the PCB board (1), each group of power supply interfaces (5) is used for respectively externally connecting positive and negative poles of a power supply to the power end and the signal end of the PCB board (1) to supply power.
2. The analog test client based on the half-bridge module group ANPC topology loss device according to claim 1, wherein: The power module is three groups, which are a first power module (6), a second power module (7) and a third power module (8); the first power module (6), the second power module (7) and the third power module (8) are each composed of a group of two-level IGBT modules, and are sequentially a first IGBT module (9), a second IGBT module (10) and a third IGBT module (11).
3. The analog test client based on the half-bridge module group ANPC topology loss device according to claim 2, wherein: The first IGBT module (9) is composed of a first IGBT transistor T1, a first diode D1 and a fifth IGBT transistor T5 and a fifth diode D5; the second IGBT module (10) is composed of a second IGBT transistor T2, a second diode D2 and a third IGBT transistor T3 and a third diode D3; and the third IGBT module (11) is composed of a fourth IGBT transistor T4, a fourth diode D4 and a sixth IGBT transistor T6 and a sixth diode D6; the collector of each group of IGBT transistors is electrically connected with the cathode of each group of diodes, and the emitter of the IGBT transistor is electrically connected with the anode of the diode.
4. The analog test client based on the half-bridge module group ANPC topology loss device according to claim 3, wherein: The first IGBT transistor T1, the first diode D1, the second IGBT transistor T2, the second diode D2, the third IGBT transistor T3, the third diode D3, the fourth IGBT transistor T4 and the fourth diode D4 are sequentially connected in circuit, the first IGBT transistor T1 and the first diode D1 are connected with the positive pole P+ of a three-level power supply input at one end away from the second IGBT transistor T2 and the second diode D2, the fourth IGBT transistor T4 and the fourth diode D4 are connected with the negative pole P- of the three-level power supply input at one end away from the third IGBT transistor T3 and the third diode D3, a branch (12) is connected in parallel between the first IGBT transistor T1 and the second IGBT transistor T2 and between the third IGBT transistor T3 and the fourth IGBT transistor T4, the fifth IGBT transistor T5, the fifth diode D5, the sixth IGBT transistor T6 and the sixth diode D6 are respectively provided on the branch (12), a P1 point is arranged at a middle position of the branch between the fifth IGBT transistor T5 and the sixth IGBT transistor T6, and the P1 point and a three-level zero level P0 are connected as a variable inductance connection, P0 to P1 is a common part of all test circuits of ANPC, and the stray inductance of the whole circuit can be changed by changing the length of the connecting line of P0 to P1, so that the test conditions of different clients can be changed.
5. The analog test client based on the half-bridge module group ANPC topology loss device according to claim 4, wherein: The line (3) between the second IGBT transistor T2 and the third IGBT transistor T3 is connected with alternating current AC.
6. The analog test client based on the half-bridge module group ANPC topology loss device according to claim 1 or 5, characterized in that: The connecting piece is a screw, and locking installation is achieved through the screw.