A Switched Reluctance Motor Controller Topology Configuration Based on Three-Phase Full-Bridge Module

Abstract

The present application belongs to the technical field of aviation power system design, and specifically relates to a switch reluctance motor controller topology configuration based on a three-phase full-bridge module. The topology includes four three-phase full-bridge modules, wherein the two-phase interface ends of the first three-phase full-bridge module (1) and the third three-phase full-bridge module (3) are connected in parallel to a voltage input end (5), and the two-phase interface ends of the second three-phase full-bridge module (2) and the fourth three-phase full-bridge module (4) are connected in parallel to a power generation voltage output end (6); the three-phase interface ends of the first three-phase full-bridge module (1) and the second three-phase full-bridge module (2) are connected through a first three-phase winding (7), and the three-phase interface ends of the third three-phase full-bridge module (3) and the fourth three-phase full-bridge module (4) are connected through a second three-phase winding (8); by controlling the negative voltage of some IGBT single-tube modules in the three-phase full-bridge module to shut them off, the topology of an asymmetric half-bridge module is realized. The present application has a simple layout structure and a high power-to-weight ratio.

Description

Technical Field

[0001] The present application belongs to the technical field of aviation power system design, and specifically relates to a switched reluctance motor controller topology configuration based on a three-phase full-bridge module. Background Art

[0002] With the continuous development of more-electric and all-electric aircraft technologies, aviation power systems are developing towards large capacity, high power density, high reliability and high fault tolerance. The switched reluctance starting generator system, as the preferred solution for aviation high-voltage DC systems, has the characteristics of simple structure, high reliability, high power density and high-speed operation capability.

[0003] Due to the current power device power level limitations, the single three-phase asymmetric half-bridge power topology cannot meet the needs of high power. Therefore, the dual three-phase asymmetric half-bridge power topology is mainly used in the high-power application of switched reluctance, that is, two single three-phase asymmetric half-bridge power topologies are connected in parallel at their starting voltage input and generating voltage output ends to form a dual three-phase asymmetric half-bridge power topology. Its topology is as follows Figure 1 shown. Figure 1 The upper middle part is a three-phase asymmetric half-bridge power topology, and the lower middle part is another three-phase asymmetric half-bridge power topology. Figure 8 The three-phase asymmetric half-bridge topology is shown in FIG. The two together constitute a dual three-phase asymmetric half-bridge power topology. The so-called "asymmetry" refers to the two types of devices in it. The first type is a diode, such as Figure 2 As shown, the second type is a combination of a diode and a switch tube, such as Figure 3 As shown, the first and second types are offset from each other to form an asymmetric structure.

[0004] like Figure 1 The dual three-phase asymmetric half-bridge topology shown is a topology commonly used in switched reluctance starting power conversion. Figure 1 As shown in the topology, there is currently no three-phase asymmetric half-bridge power IGBT module on the market, so it is necessary to build this topology through IGBT modules with different topologies and packages. The following three common solutions are available:

[0005] Solution 1: Use discrete devices to build a dual three-phase asymmetric half-bridge topology. This solution decomposes the dual three-phase asymmetric half-bridge topology into IGBT single-tube modules and diode modules. Figure 3 and Figure 2 As shown, 12 IGBT modules and 12 diode modules are required. This solution maximizes the number of modules, seriously increasing the volume and total amount of power devices. At the same time, the cross-linking between modules needs to be connected through a busbar or laminated busbar with a larger current-carrying capacity, further increasing the weight of the structural parts.

[0006] Solution 2: Use asymmetric half-bridge topology to build a dual three-phase asymmetric half-bridge topology. In this solution, you can consider using asymmetric half-bridge IGBT modules to build a dual three-phase asymmetric half-bridge topology, that is, using Figure 4 The six IGBT modules in Figure 5 The six IGBT modules in the system are jointly constructed. Due to the limited application scenarios of asymmetric bridge IGBT modules on the market, there are currently no modules larger than 600A that can meet the power requirements. Therefore, this solution cannot be used in high-power application scenarios.

[0007] Solution 3: Use a half-bridge topology to build a dual three-phase asymmetric half-bridge topology. Common half-bridge topologies on the market include Figure 6 As shown, in actual use, negative voltage is applied to the two switch tubes T2 and T3 to force them to turn off, thereby forming an asymmetric half-bridge topology of IGBT plus diode.

[0008] Currently on the market Figure 6 The half-bridge module shown in the figure has a wider range of voltage and current levels and can meet higher power application scenarios, such as Figure 7 The figure shows a specific implementation method of using 12 half-bridge modules to build a dual three-phase asymmetric half-bridge topology. This solution still involves many modules and occupies a large installation space. Summary of the invention

[0009] In order to solve the above problems, the present application provides a power conversion topology configuration and device for a high-power switched reluctance motor controller. Combined with the high power-to-weight ratio requirements for the starter generator controller in aviation applications, it proposes an architecture for building a switched reluctance three-phase asymmetric half-bridge topology using an IGBT three-phase full-bridge module.

[0010] The present application is based on a switched reluctance motor controller topology configuration of a three-phase full-bridge module, wherein the three-phase full-bridge module includes six IGBT single-tube modules, each of which includes a switch tube and a diode, wherein the input end of the diode is connected to the emitter of the switch tube, and the output end of the diode is connected to the collector of the switch tube, wherein three IGBT single-tube modules are connected in parallel to form a first combination, and another three IGBT single-tube modules are connected in parallel to form a second combination, wherein the collectors of the switch tubes in the first combination are connected in parallel to form a first parallel end, and the emitters of the switch tubes in the second combination are connected in parallel to form a second parallel end, wherein the first parallel end and the second parallel end form a two-phase interface end, and the emitters of the switch tubes in the first combination are respectively connected to the collectors of the switch tubes in the second combination, and a three-phase interface end is formed at the connection; wherein:

[0011] The switch reluctance motor controller topology configuration includes four three-phase full-bridge modules, the two-phase interface ends of the first three-phase full-bridge module and the third three-phase full-bridge module are connected in parallel to the voltage input end, and the two-phase interface ends of the second three-phase full-bridge module and the fourth three-phase full-bridge module are connected in parallel to the power generation voltage output end;

[0012] The three-phase interface ends of the first three-phase full-bridge module and the second three-phase full-bridge module are connected through the first three-phase winding, and the three-phase interface ends of the third three-phase full-bridge module and the fourth three-phase full-bridge module are connected through the second three-phase winding;

[0013] The first parallel end of the first three-phase full-bridge module is coupled to the first parallel end of the second three-phase full-bridge module, the second parallel end of the first three-phase full-bridge module is coupled to the second parallel end of the second three-phase full-bridge module, the first parallel end of the third three-phase full-bridge module is coupled to the first parallel end of the fourth three-phase full-bridge module, and the second parallel end of the third three-phase full-bridge module is coupled to the second parallel end of the fourth three-phase full-bridge module;

[0014] Among them, the switch tube bases of the three IGBT single-tube modules in the second combination of the first three-phase full-bridge module and the third three-phase full-bridge module are connected to negative voltages, and the switch tube bases of the three IGBT single-tube modules in the first combination of the second three-phase full-bridge module and the fourth three-phase full-bridge module are connected to negative voltages.

[0015] Preferably, capacitors are provided in parallel at the two-phase interface ends of the three-phase full-bridge module at the connection with the voltage input end or the power generation voltage output end.

[0016] Preferably, the switched reluctance motor controller topology is configured to have an excitation working mode. In the excitation working mode, the three IGBT single-tube modules in the first combination of the first three-phase full-bridge module are controlled to be turned on in sequence, and correspondingly, the three IGBT single-tube modules in the second combination of the second three-phase full-bridge module are controlled to be turned on at the same time, the three IGBT single-tube modules in the first combination of the third three-phase full-bridge module are turned on, the three IGBT single-tube modules in the second combination of the fourth three-phase full-bridge module are turned on, and the other IGBT single-tube modules are disconnected.

[0017] Preferably, the switched reluctance motor controller topology is configured to have a freewheeling operating mode. In the freewheeling operating mode, the three IGBT single-tube modules in the first combination of the first three-phase full-bridge module are controlled to be turned on in sequence, and correspondingly, the three IGBT single-tube modules in the first combination of the third three-phase full-bridge module are controlled to be turned on at the same time, and the other IGBT single-tube modules are disconnected.

[0018] Preferably, the switched reluctance motor controller topology is configured to have a demagnetization working mode. In the demagnetization working mode, the three IGBT single-tube modules in the second combination of the first three-phase full-bridge module are controlled to be turned on in sequence, and correspondingly, the three IGBT single-tube modules in the second combination of the third three-phase full-bridge module are controlled to be turned on at the same time, and the other IGBT single-tube modules are disconnected.

[0019] Preferably, the negative voltage is -15V.

[0020] This application treats the three-phase full-bridge module as a whole, which is smaller in size, lighter in weight, and easier to optimize the layout of chassis structural parts, thereby improving the overall power-to-weight ratio of the equipment. When using a three-phase full-bridge module for structural layout, the number of stacked busbars and busbars is reduced to a certain extent, which greatly reduces the weight of the structural parts and further improves the power-to-weight ratio of the controller. For the working mode of this topology, whether it is the starting or power generation working mode, the chips that generate heat at the same time are located in different modules and are far apart, which is conducive to the timely dissipation of heat and improves the reliability of the IGBT module to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of an existing dual three-phase asymmetric half-bridge power topology structure.

[0022] Figure 2 It is a schematic diagram of the diode structure.

[0023] Figure 3 This is a schematic diagram of the IGBT single-tube module structure.

[0024] Figure 4 This is a schematic diagram of the asymmetric half-bridge module topology.

[0025] Figure 5 This is another schematic diagram of an asymmetric half-bridge module topology.

[0026] Figure 6 It is a schematic diagram of a symmetrical half-bridge topology.

[0027] Figure 7 It is a schematic diagram of a three-phase asymmetric half-bridge power topology structure formed by a combination of symmetrical half-bridge topology structures.

[0028] Figure 8 It is a schematic diagram of a three-phase asymmetric half-bridge topology.

[0029] Fig. 9 yes Figure 8 A schematic diagram of a three-phase asymmetric half-bridge topology structure variation of the illustrated embodiment.

[0030] Fig.10 yes Fig. 9Schematic diagram of the first part of the decomposition.

[0031] Fig.11 yes Fig. 9 Schematic diagram of the second part of the decomposition.

[0032] Fig.12 It is a schematic diagram of a three-phase full-bridge topology.

[0033] Fig.13 It is a topological schematic diagram of a preferred embodiment of the topological configuration of a switched reluctance motor controller based on a three-phase full-bridge module of the present application.

[0034] Fig.14 This application Fig.13 Schematic diagram of current flow in excitation mode of the illustrated embodiment.

[0035] Fig.15 This application Fig.13 A schematic diagram of current flow in freewheeling mode of the illustrated embodiment.

[0036] Fig.16 This application Fig.13 Schematic diagram of current flow in demagnetization mode of the illustrated embodiment. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantages of the implementation of this application clearer, the technical scheme in the implementation of this application will be described in more detail in combination with the drawings in the implementation of this application. In the drawings, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The described implementation is a part of the implementation of this application, not all of the implementations. The implementation described below with reference to the drawings is exemplary and is intended to be used to explain this application, and cannot be understood as a limitation on this application. Based on the implementation in this application, all other implementations obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. The implementation of this application is described in detail below in combination with the drawings.

[0038] The present application provides a switched reluctance motor controller topology configuration based on a three-phase full-bridge module.

[0039] First, according to Figure 1 The schematic diagram of the dual three-phase asymmetric half-bridge power topology structure shown in the upper part thereof can be transformed into Figure 8 The structure shown in Figure 8 The middle and upper parts are decomposed to form Fig. 9 and Fig.10 Two-part structure. Fig. 9 and Fig.10The two parts shown have a certain degree of symmetry, but they are still not normally packaged modules on the market, so it is difficult to select a suitable IGBT module to build such Figure 8 The three-phase asymmetric half-bridge topology shown in the figure. Based on this, this application considers choosing the more mature three-phase full-bridge IGBT module on the market to build Figure 8 or Figure 1 The topology shown.

[0040] exist Fig. 9 or Fig.10 Based on this, this application adopts Fig.11 Three-phase full-bridge module, reference Fig.11 The three-phase full-bridge module includes six IGBT single-tube modules, each of which includes a switch tube and a diode. The input end of the diode is connected to the emitter of the switch tube, and the output end of the diode is connected to the collector of the switch tube. Three IGBT single-tube modules are connected in parallel to form a first combination 11, and another three IGBT single-tube modules are connected in parallel to form a second combination 12. The collectors of the switch tubes in the first combination 11 are connected in parallel to form a first parallel end, and the emitters of the switch tubes in the second combination 12 are connected in parallel to form a second parallel end. The first parallel end and the second parallel end form a two-phase interface end. The emitters of the switch tubes in the first combination 11 are respectively connected to the collectors of the switch tubes in the second combination 12, and a three-phase interface end is formed at the connection.

[0041] Continue to refer Fig.11 The three-phase full-bridge topology is a mature IGBT package module on the market. Figure 8 When the three-phase asymmetric half-bridge topology is used, it is necessary to provide -15V power to VT2, VT4, and VT6 to turn off the IGBT after the controller is powered on. The equivalent topology is as follows: Fig. 9 As shown. Correspondingly, -15V is provided to VT1, VT3, and VT5 to turn off the IGBT. The equivalent topology is as follows: Fig.10 shown.

[0042] like Fig.12 As shown in the figure, it is a specific cable connection diagram of a single-channel dual three-phase asymmetric half-bridge topology built using two three-phase full-bridge IGBT modules. Considering that the main topology of the current 100-kilowatt-class switched reluctance controller mostly adopts a dual-channel three-phase asymmetric topology structure, the following is given Fig.13 The dual-channel schematic diagram shown is composed of Fig.13 It can be seen that the dual-channel can use four three-phase full-bridge IGBT modules to complete the construction of the main topology.

[0043] refer to Fig.13, the two-phase interface ends of the first three-phase full-bridge module 1 and the third three-phase full-bridge module 3 are connected in parallel to the voltage input end 5, and the two-phase interface ends of the second three-phase full-bridge module 2 and the fourth three-phase full-bridge module 4 are connected in parallel to the power generation voltage output end 6; the three-phase interface ends of the first three-phase full-bridge module 1 and the second three-phase full-bridge module 2 are connected through the first three-phase winding 7, and the three-phase interface ends of the third three-phase full-bridge module 3 and the fourth three-phase full-bridge module 4 are connected through the second three-phase winding 8; the first parallel end of the first three-phase full-bridge module 1 is coupled to the first parallel end of the second three-phase full-bridge module 2, the second parallel end of the first three-phase full-bridge module 1 is coupled to the second parallel end of the second three-phase full-bridge module 2, the first parallel end of the third three-phase full-bridge module 3 is coupled to the first parallel end of the fourth three-phase full-bridge module 4, and the second parallel end of the third three-phase full-bridge module 3 is coupled to the second parallel end of the fourth three-phase full-bridge module 4.

[0044] Among them, the switch tube bases of the three IGBT single-tube modules in the second combination 12 in the first three-phase full-bridge module 1 and the third three-phase full-bridge module 3 are connected to negative voltages, and the switch tube bases of the three IGBT single-tube modules in the first combination 11 in the second three-phase full-bridge module 2 and the fourth three-phase full-bridge module 4 are connected to negative voltages.

[0045] In some optional embodiments, the two-phase interface terminals of the three-phase full-bridge module are connected to the voltage input terminal 5 or the power generation voltage output terminal 6 in parallel with capacitors. In some optional embodiments, the negative voltage is -15V, such as Figure 6 As shown, this is achieved by a square wave.

[0046] In some optional embodiments, the switched reluctance motor controller topology is configured to have an excitation working mode. In the excitation working mode, the three IGBT single-tube modules in the first combination 11 of the first three-phase full-bridge module 1 are controlled to be turned on in turn, and correspondingly, the three IGBT single-tube modules in the second combination 12 of the second three-phase full-bridge module 2 are controlled to be turned on at the same time, the three IGBT single-tube modules in the first combination 11 of the third three-phase full-bridge module 3 are turned on, and the three IGBT single-tube modules in the second combination 12 of the fourth three-phase full-bridge module 4 are turned on, and the other IGBT single-tube modules are disconnected.

[0047] Fig.14The on-off status of the switch tubes at a certain moment in the excitation mode is given, among which the four switch tubes VT11, VT22, VT31, and VT42 are controlled to be turned on to provide excitation energy for the motor winding. At this time, current flows through VT11, VT22, VT31, and VT42. It can be understood that according to the characteristics of the three-phase circuit, the four switch tubes VT13, VT24, VT33, and VT44 are controlled to be turned on at the next moment, and the four switch tubes VT15, VT26, VT35, and VT46 are controlled to be turned on at the next moment, and the cycle is repeated to realize excitation control.

[0048] In some optional embodiments, the switched reluctance motor controller topology is configured to have a freewheeling operating mode. In the freewheeling operating mode, the three IGBT single-tube modules in the first combination 11 of the first three-phase full-bridge module 1 are controlled to be turned on in turn, and correspondingly, the three IGBT single-tube modules in the first combination 11 of the third three-phase full-bridge module 3 are controlled to be turned on at the same time, and the other IGBT single-tube modules are disconnected.

[0049] like Fig.15 The figure shows the freewheeling mode, at which the current on the winding is freewheeling through the diodes VT11 and VD21, and the diodes VT31 and VD41. At the next moment, VT13 and VT33 are turned on, at which the current on the winding is freewheeling through the diodes VT13 and VD23, and the diodes VT33 and VD43. At the next moment, VT15 and VT35 are turned on, at which the current on the winding is freewheeling through the diodes VT15 and VD25, and the diodes VT35 and VD45.

[0050] In some optional embodiments, the switched reluctance motor controller topology is configured to have a demagnetization working mode. In the demagnetization working mode, the three IGBT single-tube modules in the second combination 12 of the first three-phase full-bridge module 1 are controlled to be turned on in turn, and correspondingly, the three IGBT single-tube modules in the second combination 12 of the third three-phase full-bridge module 3 are controlled to be turned on at the same time, and the other IGBT single-tube modules are disconnected.

[0051] like Fig.16 The figure shows the demagnetization mode, in which the current on the winding is output to the capacitor through the VD21 diode, the VD12 diode, the VD32 diode and the VD41 diode.

[0052] Comprehensive comparative analysis shows that the scheme of using three-phase full-bridge IGBT modules to build the main topology has the following advantages: ① Using the relatively mature three-phase full-bridge IGBT modules in China, there is no need to customize the power module, which reduces the initial R&D and design costs. ② As a whole, the size and weight of the three-phase full-bridge module are better than those of three half-bridge modules. Therefore, the use of four three-phase full-bridge modules is smaller in size and lighter in weight than the use of 12 half-bridge modules, and the chassis structure is easier to optimize the layout, which improves the overall power-to-weight ratio of the equipment. ③ When using three-phase full-bridge modules for structural layout, the number of stacked busbars and busbars is reduced to a certain extent, which greatly reduces the weight of the structural parts and further improves the power-to-weight ratio of the controller. ④ For the working mode of this topology, whether it is the starting or power generation working mode, the chips that generate heat at the same time are located in different modules and are far apart, which is conducive to the timely dissipation of heat and improves the reliability of the IGBT module to a certain extent.

[0053] The present application has a simple layout structure, a high power-to-weight ratio, and can meet the needs of high-power starting / generation integration at the hundreds of kilowatt level.

[0054] Although the present application has been described in detail above with general descriptions and specific implementation schemes, it is obvious to those skilled in the art that some modifications or improvements may be made to the present application. Therefore, these modifications or improvements made without departing from the spirit of the present application all fall within the scope of protection claimed in the present application.

Claims

1. A topological configuration of a switched reluctance motor controller based on a three-phase full-bridge module, wherein the three-phase full-bridge module comprises six IGBT single-tube modules, each IGBT single-tube module comprises a switch tube and a diode, the input end of the diode is connected to the emitter of the switch tube, and the output end of the diode is connected to the collector of the switch tube, three IGBT single-tube modules are connected in parallel to form a first combination (11), and another three IGBT single-tube modules are connected in parallel to form a second combination (12), the collectors of the switch tubes in the first combination (11) are connected in parallel to form a first parallel end, the emitters of the switch tubes in the second combination (12) are connected in parallel to form a second parallel end, the first parallel end and the second parallel end form a two-phase interface end, the emitters of the switch tubes in the first combination (11) are respectively connected to the collectors of the switch tubes in the second combination (12), and a three-phase interface end is formed at the connection; characterized in that: The switch reluctance motor controller topology configuration comprises four three-phase full-bridge modules, wherein the two-phase interface ends of the first three-phase full-bridge module (1) and the third three-phase full-bridge module (3) are connected in parallel to the voltage input end (5), and the two-phase interface ends of the second three-phase full-bridge module (2) and the fourth three-phase full-bridge module (4) are connected in parallel to the power generation voltage output end (6); The three-phase interface ends of the first three-phase full-bridge module (1) and the second three-phase full-bridge module (2) are connected via a first three-phase winding (7), and the three-phase interface ends of the third three-phase full-bridge module (3) and the fourth three-phase full-bridge module (4) are connected via a second three-phase winding (8); The first parallel end of the first three-phase full-bridge module (1) is coupled to the first parallel end of the second three-phase full-bridge module (2), the second parallel end of the first three-phase full-bridge module (1) is coupled to the second parallel end of the second three-phase full-bridge module (2), the first parallel end of the third three-phase full-bridge module (3) is coupled to the first parallel end of the fourth three-phase full-bridge module (4), and the second parallel end of the third three-phase full-bridge module (3) is coupled to the second parallel end of the fourth three-phase full-bridge module (4); The switch tube bases of the three IGBT single-tube modules in the second combination (12) of the first three-phase full-bridge module (1) and the third three-phase full-bridge module (3) are connected to negative voltages, and the switch tube bases of the three IGBT single-tube modules in the first combination (11) of the second three-phase full-bridge module (2) and the fourth three-phase full-bridge module (4) are connected to negative voltages; The switch reluctance motor controller topology is configured to have an excitation working mode. In the excitation working mode, the three IGBT single-tube modules in the first combination (11) of the first three-phase full-bridge module (1) are sequentially controlled to be turned on, and correspondingly, the three IGBT single-tube modules in the second combination (12) of the second three-phase full-bridge module (2) are simultaneously controlled to be turned on, the three IGBT single-tube modules in the first combination (11) of the third three-phase full-bridge module (3) are turned on, and the three IGBT single-tube modules in the second combination (12) of the fourth three-phase full-bridge module (4) are turned on, and the other IGBT single-tube modules are disconnected. The switch reluctance motor controller topology is configured to have a freewheeling operation mode. In the freewheeling operation mode, three IGBT single-tube modules in the first combination (11) of the first three-phase full-bridge module (1) are sequentially controlled to be turned on, and correspondingly, three IGBT single-tube modules in the first combination (11) of the third three-phase full-bridge module (3) are simultaneously controlled to be turned on, and other IGBT single-tube modules are turned off; The switch reluctance motor controller topology is configured to have a demagnetization working mode. In the demagnetization working mode, the three IGBT single-tube modules in the second combination (12) of the first three-phase full-bridge module (1) are controlled to be turned on in sequence, and correspondingly, the three IGBT single-tube modules in the second combination (12) of the third three-phase full-bridge module (3) are controlled to be turned on at the same time, while the other IGBT single-tube modules are turned off.

2. The topology configuration of the switched reluctance motor controller based on the three-phase full-bridge module according to claim 1, characterized in that: Capacitors are arranged in parallel at the two-phase interface ends of the three-phase full-bridge module at the connection points with the voltage input end (5) or the power generation voltage output end (6).

3. The topology configuration of the switched reluctance motor controller based on the three-phase full-bridge module according to claim 1, characterized in that: The negative voltage is -15V.

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