CN109787489B - Auxiliary power supply system power module - Google Patents
Auxiliary power supply system power module Download PDFInfo
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- CN109787489B CN109787489B CN201910227169.3A CN201910227169A CN109787489B CN 109787489 B CN109787489 B CN 109787489B CN 201910227169 A CN201910227169 A CN 201910227169A CN 109787489 B CN109787489 B CN 109787489B
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Abstract
The invention discloses an auxiliary power supply system power module which comprises a frame assembly for mounting electric elements, wherein a water cooling plate assembly for cooling and heat dissipation, an auxiliary inverter power unit device and a charger power unit device are detachably mounted in the frame assembly; the water cooling plate assembly comprises a water cooling base plate, the auxiliary inverter power unit device comprises an auxiliary inverter power unit, and the charger power unit device comprises a charger power unit; the auxiliary inverter power unit and the charger power unit are arranged on two sides of the water-cooling base plate, so that heat generated by the auxiliary inverter power unit and the charger power unit can be taken away by the water-cooling base plate in time. The heat dissipation capability is strong, and the lightweight design of the auxiliary power supply system can be better realized.
Description
Technical Field
The invention belongs to the technical field of railway vehicles, and particularly relates to an auxiliary power supply system of a railway vehicle.
Background
Urban rail vehicle's auxiliary power supply system generally includes auxiliary inverter and machine that charges, and at present, urban rail subway is mostly power frequency auxiliary inverter + high frequency machine that charges with auxiliary power supply system, and its application mode also generally divide into two kinds: the auxiliary power system is distributed and divided into an auxiliary inverter box and a charger box. The traditional auxiliary power supply system needs to adopt a power frequency transformer, so that the size and the weight are large, and the purposes of miniaturization and light weight design are difficult to realize. Along with the increasing requirements of energy conservation and emission reduction of rail transit, the light-weight requirement of vehicles on equipment under the vehicle is higher and higher, and how to realize the miniaturization and light-weight design of an auxiliary power supply system also becomes a key point and a difficult problem to be solved.
The traditional auxiliary power supply system is generally of a power frequency inverter circuit topological structure, a forced air cooling or natural cooling mode is adopted, the auxiliary inverter and the charger are separated, the whole system is large in size and poor in heat dissipation effect, and the traditional auxiliary power supply system is difficult to reduce the weight substantially. At present, the key links influencing the weight and the volume of the system are generally the following aspects: 1. a circuit topology of the system; 2. the heat dissipation mode of the system; 3. the degree of integration of the system. Therefore, how to take effective measures to comprehensively consider and optimize the three aspects is the key to essentially solve the problem of light weight design of the system.
Disclosure of Invention
The present invention is directed to solve the above-mentioned problems, and an object of the present invention is to provide a power module of an auxiliary power supply system, which has a strong heat dissipation capability and can achieve a light weight design of the auxiliary power supply system.
The technical scheme of the invention is as follows:
an auxiliary power supply system power module comprises a frame assembly for mounting electric elements, wherein a water cooling plate assembly for cooling and radiating, an auxiliary inverter power unit device and a charger power unit device are detachably mounted in the frame assembly; the water cooling plate assembly comprises a water cooling base plate, the auxiliary inverter power unit device comprises an auxiliary inverter power unit, and the charger power unit device comprises a charger power unit;
the auxiliary inverter power unit and the charger power unit are arranged on two sides of the water-cooling base plate, so that heat generated by the auxiliary inverter power unit and the charger power unit can be taken away by the water-cooling base plate in time.
Preferably, the auxiliary inverter power unit comprises a Boost voltage booster circuit, an overvoltage absorption circuit and an inverter circuit which are connected in sequence; the charger power unit comprises a pre-charging circuit, a voltage stabilizing and discharging circuit, a high-frequency power conversion circuit and a rectifying and filtering circuit which are connected in sequence; wherein the content of the first and second substances,
the Boost circuit is used for boosting and stabilizing the fluctuating voltage, and the output voltage of the Boost circuit is used as the voltage input of the inverter circuit and the charger power unit; the overvoltage absorption circuit is used for absorbing overvoltage generated by the inverter circuit; the inverter circuit is used for providing output of three-phase pulsating alternating current voltage;
the pre-charging circuit is directly provided with input voltage by the Boost circuit and realizes the current-limiting charging of the voltage-stabilizing and discharging circuit; the high-frequency power conversion circuit converts a direct-current voltage into a square-wave voltage; and the rectification filter loop is used for rectifying and filtering the square wave voltage into stable direct current voltage and outputting the stable direct current voltage.
Preferably, the Boost circuit comprises a first reactor, a first insulated gate bipolar transistor, a first diode, a first discharge resistor and a first support capacitor, wherein a circuit formed by connecting the first insulated gate bipolar transistor and the first diode in series is respectively connected with the first discharge resistor and the first support capacitor in parallel; the overvoltage absorption circuit comprises a first insulated gate bipolar transistor pair and a first absorption resistor; the inverter circuit comprises a second insulated gate bipolar transistor pair, a third insulated gate bipolar transistor pair and a fourth insulated gate bipolar transistor pair, wherein the second insulated gate bipolar transistor pair, the third insulated gate bipolar transistor pair and the fourth insulated gate bipolar transistor pair are arranged in parallel;
the pre-charging circuit comprises a main contactor, a pre-charging contactor and a pre-charging resistor, and a circuit formed by connecting the pre-charging resistor and the pre-charging contactor in series is arranged in parallel with the main contactor; the voltage stabilizing and discharging circuit comprises a second discharging resistor and a second supporting capacitor, and the second discharging resistor and the second supporting capacitor are arranged in parallel; the high-frequency power conversion circuit comprises a first absorption capacitor, a second absorption capacitor, a fifth insulated gate bipolar transistor pair, a second diode, a third diode, a blocking capacitor and a high-frequency transformer, wherein the first absorption capacitor and the second absorption capacitor are respectively connected with two insulated gate bipolar transistors of the fifth insulated gate bipolar transistor pair in parallel, the second diode and the third diode are respectively connected with the fifth insulated gate bipolar transistor pair and the sixth insulated gate bipolar transistor pair, and the blocking capacitor is respectively connected with an intermediate contact of the fifth insulated gate bipolar transistor pair and a primary contact of the high-frequency transformer; the rectification and filtering circuit comprises a rectification loop and a filtering loop, and the rectification loop comprises a first RC absorption circuit, a second RC absorption circuit, a first rectification diode and a second rectification diode; the filtering loop comprises a first filter reactor, a second filter reactor, a filter capacitor, an output filter, a fuse and an anti-reverse diode.
Preferably, the first insulated gate bipolar transistor and the first discharge resistor of the Boost voltage-boosting circuit, and the overvoltage absorption circuit comprise a first insulated gate bipolar transistor pair and a first absorption resistor, and the second insulated gate bipolar transistor pair, the third insulated gate bipolar transistor pair and the fourth insulated gate bipolar transistor pair of the inverter circuit are arranged on the surface of the water-cooling substrate;
the frame assembly is also provided with a support capacitor mounting plate, and the first support capacitor is arranged close to the water-cooling substrate through the support capacitor mounting plate;
preferably, a charger driving plate and a charger top plate are arranged on one side, where the charger power unit is installed, of the water-cooling base plate, and the charger driving plate and the charger top plate are installed on the water-cooling base plate along a direction departing from the water-cooling base plate;
wherein the pre-charge resistor of the pre-charge circuit, the second discharge resistor of the voltage stabilizing and discharging circuit, the second diode, the third diode, the fifth insulated gate bipolar transistor pair, the sixth insulated gate bipolar transistor pair and the high-frequency transformer, the first RC absorption circuit, the second RC absorption circuit, the first and second rectifier diodes of the rectification circuit, and the anti-reverse diode of the filtering circuit are arranged on the surface of the water-cooled substrate;
the second supporting capacitor of the voltage stabilizing and discharging circuit, the first absorption capacitor of the high-frequency power conversion circuit, the second absorption capacitor and the blocking capacitor are integrated on the charger driving board;
the filter capacitor, the output filter and the fuse of the filter loop are integrated on the charger top plate.
Preferably, the auxiliary inverter power unit device further comprises an auxiliary inverter laminated busbar, the auxiliary inverter laminated busbar comprises three layers, namely a negative electrode layer, a positive electrode layer and an alternating current layer, and the negative electrode layer, the positive electrode layer and the alternating current layer are insulated from each other; the negative electrode layer and the positive electrode layer are both L-shaped, and a first insulated gate bipolar transistor pair of the overvoltage absorption circuit, a second insulated gate bipolar transistor pair of the inverter circuit, a third insulated gate bipolar transistor pair and a fourth insulated gate bipolar transistor pair are connected with a first support capacitor of the Boost circuit through the negative electrode layer and the positive electrode layer of the auxiliary inverter laminated busbar; the alternating current layer is provided with four paths of outputs which are mutually insulated, the four paths of outputs of the alternating current layer are respectively connected with four copper bars, and the four copper bars are respectively connected with intermediate joints of the first insulated gate bipolar transistor pair, the second insulated gate bipolar transistor pair, the third insulated gate bipolar transistor pair and the fourth insulated gate bipolar transistor pair.
Preferably, the main contactor and the pre-charging contactor of the pre-charging circuit are mounted on the frame assembly.
Preferably, the water-cooling plate assembly further comprises a water-cooling plate water inlet and outlet, and the water-cooling plate water inlet and outlet is installed on the water-cooling base plate.
Preferably, the water-cooling base plate further comprises an auxiliary inverter driving assembly, a charger driving assembly, and an auxiliary inverter control unit assembly and a charger control unit assembly which are installed on the frame assembly, wherein the auxiliary inverter driving assembly and the charger driving assembly are respectively installed on two sides of the water-cooling base plate.
Preferably, the auxiliary inverter control unit assembly is hinged to one side of the frame assembly.
The invention has the beneficial effects that: the technical scheme provided by the invention has the following advantages,
(1) in order to solve the problem that the auxiliary system is difficult to realize light weight design, the invention comprehensively considers three key links and essentially realizes the purpose of light weight. Firstly, a high-frequency circuit topology is adopted on a topological structure to replace the traditional power frequency circuit topology, a heavier power frequency transformer of a traditional power frequency auxiliary system is eliminated, and the aim of greatly reducing weight is fulfilled; secondly, a water-cooling heat dissipation mode with higher heat dissipation efficiency is adopted to replace the traditional cooling mode of forced air cooling or natural cooling, so that the problem of large heat dissipation power consumption of multiple devices is solved; and thirdly, the traditional distributed design is replaced by adopting an integrated design mode of the auxiliary inverter power unit and the charger power unit, so that the aims of miniaturization and integrated design are fulfilled. Through reasonable optimization of all links, the aim of lightweight design of the auxiliary power supply system is finally achieved.
(2) According to the auxiliary power supply system power module, the power supplies of the auxiliary inverter power unit and the charger power unit are supplied by the DC600V output by the Boost circuit, so that the circuit structure is simplified, and the system reliability is improved.
(3) According to the auxiliary power supply system power module, the charger power unit adopts a soft switching technology, zero-voltage zero-current switching of an IGBT (insulated gate bipolar transistor) in a circuit is realized, switching loss of the IGBT is reduced, and conversion efficiency of the charger is improved.
(4) According to the power module of the auxiliary power supply system, the main body supporting structure is of an aluminum alloy frame structure, the water-cooling base plate is arranged on the aluminum alloy frame, and the rest of the mounting plates or the support frames are made of aluminum alloy materials, so that the weight of the module is reduced while the structural strength is ensured.
(5) Compared with the traditional split structure of the power module, the invention adopts an integrated design mode, fully utilizes the advantages of the arrangement of two sides of a water-cooling substrate and high heat dissipation efficiency, integrates the auxiliary inverter power unit and the charger power unit on two sides of the water-cooling substrate, and realizes the purpose of integrating the auxiliary inverter power module and the charger power module on one power module; simultaneously auxiliary power supply system power module is provided with nylon slide rail and handle, and the nylon slide rail has played the effect that the restriction module removed about simultaneously, and this structure is convenient for install and dismantle, has compact structure, maintains convenient characteristics.
(6) The water inlet and outlet of the water-cooling substrate adopt quick connectors, so that the leakage of cooling liquid caused by the plugging and unplugging of the connectors in the module mounting and dismounting processes is avoided.
(7) The auxiliary power supply system power module adopts a layered structure design idea, the charger driving board and the charger top board are arranged on the basis of the water-cooling substrate along the direction deviating from the water-cooling substrate, corresponding electric devices are reasonably arranged on different layers according to the heating condition of the devices and the circuit structure, for the devices with larger heating, such as Insulated Gate Bipolar Transistor (IGBT), a resistor, a diode, a transformer, an electric reactor and the like, are directly arranged on the surface of the water-cooling substrate, the devices arranged on the charger driving board and the charger top board do not heat or have lower heating degree than the power devices on the water-cooling substrate, the layered structure greatly improves the space utilization rate and realizes efficient heat dissipation, and the purposes of miniaturization and integration design are further realized.
(8) The auxiliary inverter control unit assembly is arranged on the outermost side of the module frame, so that the state of the control unit can be directly observed after the cabinet door is opened; meanwhile, the auxiliary control unit assembly and the frame assembly are hinged to form a rotary structure, and the internal devices of the power module of the auxiliary power supply system can be observed and maintained by opening the rotary door on the premise of not disassembling the assembly.
Drawings
FIG. 1 is a schematic circuit diagram of an auxiliary power system power module;
FIG. 2 is a schematic diagram of a power module of the auxiliary power system;
FIG. 3 is a schematic view of a swivel mounting arrangement of the auxiliary control unit assembly;
FIG. 4 is a schematic view of the installation structure of the water-cooled substrate on the side where the auxiliary inverter power unit is installed;
FIG. 5 is a schematic view of the mounting structure of the water-cooled substrate on the side where the charger power unit is mounted;
FIG. 6 is a schematic view of another mounting structure of the water-cooled substrate on the side where the charger power unit is mounted;
FIG. 7 is a schematic structural view of an auxiliary inverter drive plate assembly;
FIG. 8 is a schematic structural diagram of a top plate of the charger;
in the figure: 1. a frame assembly; 2. a water-cooled plate assembly; 3. an auxiliary inverter power cell device; 31. an auxiliary inverter pole conduit assembly; 32. a first discharge resistor; 33. a first absorption resistor; 34. an auxiliary inverter IGBT assembly; 35. an auxiliary inverter laminated busbar; 36. supporting the capacitor mounting plate; 37. a first support capacitor; 4. a charger power unit device; 41. a charger drive board; 42. a charger top plate; 43. a charger resistance component; 44. the charger absorbs the resistance; 45, a first step of; the charger absorbs the capacitance; 46; a high-frequency transformer; 47. a rectifier diode; 48. a filter reactor; 491. an output filter; 492. a fuse; 493. a filter capacitor; 5. an auxiliary inverter control unit assembly; 6. a charger control unit assembly; 7; an auxiliary inverter drive assembly; 8. charger drive assembly.
Detailed Description
The invention is described in detail below by way of exemplary embodiments. It should be understood, however, that elements, structures and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.
In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", "front", "rear", and the like indicate orientations or positional relationships based on positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
as shown in fig. 2, an auxiliary power supply system power module includes a frame assembly 1 for mounting electrical components, and a water cooling plate assembly 2 for cooling and heat dissipation, an auxiliary inverter power unit device 3 and a charger power unit device 4 are detachably mounted in the frame assembly; the water cooling plate assembly 2 comprises a water cooling base plate, the auxiliary inverter power unit device 3 comprises an auxiliary inverter power unit, and the charger power unit device 4 comprises a charger power unit;
the auxiliary inverter power unit and the charger power unit are arranged on two sides of the water-cooling base plate, so that heat generated by the auxiliary inverter power unit and the charger power unit can be taken away by the water-cooling base plate in time.
As shown in fig. 1, the auxiliary inverter power unit includes a Boost voltage Boost circuit, an overvoltage absorption circuit and an inverter circuit, which are connected in sequence; the charger power unit comprises a pre-charging circuit, a voltage stabilizing and discharging circuit, a high-frequency power conversion circuit and a rectifying and filtering circuit which are connected in sequence; wherein the content of the first and second substances,
the Boost circuit is used for boosting and stabilizing the fluctuating voltage (realizing boosting and stabilizing the fluctuating voltage output by the DCDC high-frequency conversion circuit at the front end of the circuit), and the output voltage (the voltage of DC600V output by the Boost circuit is stable) of the Boost circuit is used as the voltage input of the inverter circuit and the charger power unit; the overvoltage absorption circuit is used for absorbing overvoltage generated by the inverter circuit and protecting devices; the inverter circuit is used for providing output of three-phase pulsating alternating current voltage;
the pre-charging circuit is directly provided with an input voltage by the Boost circuit and realizes the current-limiting charging of a supporting capacitor (a second supporting capacitor FC2) in the voltage stabilizing and discharging circuit; the high-frequency power conversion circuit converts a direct-current voltage into a square-wave voltage; and the rectification filter loop is used for rectifying and filtering the square wave voltage into stable direct current voltage and outputting the stable direct current voltage.
As shown in fig. 1 and fig. 4 to fig. 6, the Boost voltage Boost circuit includes a first reactor L1, a first insulated gate bipolar transistor IGBT1, a first diode D1, a first discharge resistor 32(R1), and a first support capacitor 37(FC1), wherein a circuit formed by connecting the first insulated gate bipolar transistor IGBT1 and the first diode D1 in series is respectively connected in parallel with the first discharge resistor 32(R1) and the first support capacitor 37(FC 1); the overvoltage absorption circuit comprises a first insulated gate bipolar transistor pair IGBT2 and a first absorption resistor 33 (R2); the inverter circuit comprises a second insulated gate bipolar transistor pair IGBT3, a third insulated gate bipolar transistor pair IGBT4 and a fourth insulated gate bipolar transistor IGBT5 pair, wherein the second insulated gate bipolar transistor pair IGBT3, the third insulated gate bipolar transistor pair IGBT4 and the fourth insulated gate bipolar transistor pair IGBT5 are arranged in parallel; the first IGBT1 and the first diode D1 are collectively referred to as an auxiliary inverter diode assembly 31; the first, second, third, and fourth pairs of insulated gate bipolar transistors IGBT2, IGBT3, IGBT4, and IGBT5 are collectively referred to as the auxiliary inverter IGBT assembly 34.
The pre-charging circuit comprises a main contactor KM1, a pre-charging contactor KM2 and a pre-charging resistor R0, wherein a circuit formed by connecting the pre-charging resistor R0 and the pre-charging contactor KM2 in series is arranged in parallel with the main contactor KM 1; the voltage stabilizing and discharging circuit comprises a second discharging resistor R3 and a second supporting capacitor FC2, and the second discharging resistor R3 is arranged in parallel with the second supporting capacitor FC 2; during the starting process of the system, firstly, the pre-charging contactor KM2 is closed, the second supporting capacitor FC2 is charged through the pre-charging resistor R0, the voltage of the capacitor is stably increased, after the charging is finished, the pre-charging contactor KM2 is opened, the pre-charging resistor R0 is cut off, and meanwhile, the main contactor KM1 is closed, so that the normal operation of the system is realized, wherein the pre-charging resistor R0 and the second discharging resistor are collectively called as a charger resistor component 43.
The high-frequency power conversion circuit comprises a first absorption capacitor Ce1, a second absorption capacitor Ce2, a fifth insulated gate bipolar transistor pair IGBT6, a fifth insulated gate bipolar transistor pair IGBT7, a second diode D2, a third diode D3, a blocking capacitor Cb and a high-frequency transformer 46(TR1), wherein the first absorption capacitor Ce1 and the second absorption capacitor Ce2 are respectively connected with two insulated gate bipolar transistors of the fifth insulated gate bipolar transistor pair IGBT6 in parallel, the second diode D2 and the third diode D3 are respectively connected with the fifth insulated gate bipolar transistor pair IGBT6 and the sixth insulated gate bipolar transistor pair IGBT7, the blocking capacitor Cb is respectively connected with an intermediate contact of the fifth insulated gate bipolar transistor pair IGBT6 and a primary contact of the high-frequency transformer 46(TR1), and the high-frequency power conversion circuit converts an input DC600V 600V into a square wave voltage, in order to further reduce the loss of the charger power unit, compared with the traditional phase-shifted full-bridge circuit, the second diode D2, the third diode D3, the first absorption capacitor Ce1 and the second absorption capacitor Ce2 are added, so that zero-voltage and zero-current switching of the IGBT in the circuit can be well realized, and the turn-on and turn-off loss of the IGBT is reduced.
The rectification filter circuit comprises a rectification circuit and a filter circuit, wherein the rectification circuit comprises a first RC absorption circuit (R4, C3), a second RC absorption circuit (R5, C4), a first rectification diode VD1 and a second rectification diode VD 2; the filter loop comprises a first filter reactor L2, a second filter reactor L3, a filter capacitor 493(C5), an output filter 491(EMI1), a fuse 492(FU1) and an anti-reverse diode D4, and the rectifying filter loop rectifies and filters the 110V square wave voltage output by the front-end circuit into a stable DC110V voltage; wherein, C3 and C4 are collectively referred to as a charger absorption capacitor 45; r4 and R5 are collectively referred to as a charger absorption resistor 44; the first rectifying diode VD1 and the second rectifying diode VD2 are collectively referred to as a rectifying diode 47; the first filter reactor L2 and the second filter reactor L3 are collectively referred to as a filter reactor 48.
Further, a first insulated gate bipolar transistor IGBT1 and a first discharge resistor 32(R1) of the Boost voltage Boost circuit, the overvoltage absorption circuit include a first insulated gate bipolar transistor pair IGBT2 and a first absorption resistor 33(R2), and the second insulated gate bipolar transistor pair IGBT3, a third insulated gate bipolar transistor pair IGBT4 and a fourth insulated gate bipolar transistor pair IGBT5 of the inverter circuit are disposed on the surface of the water-cooled substrate;
a support capacitor mounting plate 36 is further mounted on the frame assembly 1, and the first support capacitor 37(FC1) is arranged close to the water-cooled substrate through the support capacitor mounting plate 36; particularly, the Boost circuit further comprises a first voltage sensor TV1 for detecting the output voltage of the Boost circuit, the first voltage sensor TV1 is mounted on the support capacitor mounting plate 36, and the output end of the Boost circuit is further provided with a first current sensor TA1 for detecting the input current of the inverter circuit.
As shown in fig. 5 and 6, a charger driving plate 41 and a charger top plate 42 are arranged on one side of the water-cooling substrate, on which the charger power unit is installed, and the charger driving plate 41 and the charger top plate 42 are installed on the water-cooling substrate along a direction departing from the water-cooling substrate;
further referring to fig. 4, the auxiliary inverter power unit device 3 further includes an auxiliary inverter laminated busbar 35, the auxiliary inverter laminated busbar 35 includes three layers, which are a negative electrode layer, a positive electrode layer and an alternating current layer in sequence, and the negative electrode layer, the positive electrode layer and the alternating current layer are insulated from each other; the negative electrode layer and the positive electrode layer are both in an L shape, and a first insulated gate bipolar transistor pair IGBT2 of the overvoltage absorption circuit, a second insulated gate bipolar transistor pair IGBT3 of the inverter circuit, a third insulated gate bipolar transistor pair IGBT4 and a fourth insulated gate bipolar transistor pair IGBT5 of the overvoltage absorption circuit are connected with a first supporting capacitor 37(FC1) of the Boost circuit through the negative electrode layer and the positive electrode layer of the auxiliary inverter laminated busbar 35; the overvoltage absorption circuit and the inverter circuit are provided with four current sensors (CTO, CTU, CTV and CTW, wherein the CTU, CTV and CTW are respectively current sensors for detecting UVW three-phase output), and the four current sensors are sleeved on the four copper bars.
Wherein the pre-charge resistor R0 of the pre-charge circuit, the second discharge resistor R3 of the voltage stabilization and discharge circuit, the second diode D2 of the high-frequency power conversion circuit, the third diode D3, the fifth IGBT6, the sixth IGBT7 and the high-frequency transformer 46(TR1), the first RC snubber circuit (R4, C3) of the rectifier circuit, the second RC snubber circuit (R5, C4), the first and second rectifier diodes VD1 and VD2, and the anti-reverse diode D4 of the filter circuit are disposed on the surface of the water-cooled substrate; wherein the main contactor KM1 and the pre-charging contactor KM2 of the pre-charging circuit are installed on the frame assembly 1.
The second supporting capacitor FC2 of the voltage stabilizing and discharging circuit, the first absorbing capacitor Ce1 of the high-frequency power conversion circuit, the second absorbing capacitor Ce2 and the dc blocking capacitor Cb are integrated on the charger driving board 41;
the filter capacitor 493(C5), the output filter 491(EMI1) and the fuse 492(FU1) of the filter loop are integrated on the charger top plate 42, and particularly, for the output circuit device of the charger power unit device 4 which is mainly integrated on the charger top plate 42 component, the circuit connection is convenient, the wiring is simple, and the layout is reasonable.
Particularly, the charger power unit is also provided with a second voltage sensor TV2 for detecting the input voltage of the charger power unit, a third voltage sensor TV3 for detecting the voltage at two ends of the voltage stabilizing and discharging circuit and a second current sensor TA2 for detecting the output current of a pre-charging circuit, and the high-frequency power conversion circuit is also provided with a third current sensor TA 3; the filtering loop is also provided with a fourth current sensor TA4 for detecting output filtering current, a fourth voltage sensor for detecting output filtering voltage and a fifth current sensor for detecting output current of the charger power unit; wherein the second voltage sensor TV2, the third voltage sensor TV3, the second current sensor TA2, the third current sensor TA3 and the fourth voltage sensor TV4 are disposed on the charger driving plate 41, and the fourth current sensor TA4 and the fifth current sensor TA5 are disposed on the charger top plate 42.
As shown in fig. 4, the water-cooling plate assembly 2 further comprises a water-cooling plate water inlet and outlet, the water-cooling plate water inlet and outlet is installed on the water-cooling base plate, the water-cooling plate water inlet and outlet adopts a quick plug, the maintenance is convenient, the disassembly module only needs to plug the quick plug, and water drainage is not needed.
As shown in fig. 2 and 7, the solar water-cooled solar water-; the auxiliary inverter control unit assembly 5 is hinged to one side of the frame assembly 1, a rotary structure is achieved, the assembly does not need to be disassembled, and internal devices can be maintained conveniently only by opening the rotary door.
It should be noted that the first to sixth IGBT pairs (IGBT2 to IGBT7) according to the present invention are each formed by connecting two IGBT in series.
For the above specific embodiments of the present invention, it should be noted that, since the present invention relates to the overall structural design of the auxiliary power supply system for a rail vehicle, there are many components involved, and the above embodiments do not describe specific structures/positions or functions of some of the components, but all of them are common components in the prior art and can be directly selected and purchased, or are auxiliary unnecessary components that are easily understood or easily designed by those skilled in the art, the technical problems of heat dissipation and light weight design to be solved by the present invention, and therefore, it is hard to avoid referring to many corresponding components, and the above embodiments may have names that are only listed but do not describe in detail or only describe the general positions (on the components/assemblies), and do not need to describe deeper specific structures or positions, the specific installation positions or structures of some components may be various on the basis of the technical core of the present invention, and those skilled in the art may adaptively select or design, so that details are not repeated in the above-described embodiments.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (8)
1. An auxiliary power system power module, comprising: the cooling system comprises a frame assembly for mounting electric elements, wherein a water cooling plate assembly for cooling and heat dissipation, an auxiliary inverter power unit device, a charger power unit device, an auxiliary inverter driving assembly, a charger driving assembly, an auxiliary inverter control unit assembly and a charger control unit assembly are detachably mounted in the frame assembly; the water cooling plate assembly comprises a water cooling base plate, the auxiliary inverter power unit device comprises an auxiliary inverter power unit, and the charger power unit device comprises a charger power unit;
the auxiliary inverter power unit and the charger power unit are arranged on two sides of the water-cooling base plate, so that heat generated by the auxiliary inverter power unit and the charger power unit can be taken away by the water-cooling base plate in time;
the auxiliary inverter control unit assembly and the charger control unit assembly are arranged on the frame assembly;
the auxiliary inverter driving assembly and the charger driving assembly are respectively arranged on two sides of the water-cooling substrate, and the auxiliary inverter driving assembly is arranged on one side of the water-cooling substrate, on which the auxiliary inverter power unit is arranged;
the auxiliary inverter power unit comprises a Boost circuit, an overvoltage absorption circuit and an inverter circuit which are connected in sequence;
the charger power unit comprises a pre-charging circuit, a voltage stabilizing and discharging circuit, a high-frequency power conversion circuit and a rectifying and filtering circuit which are connected in sequence.
2. The auxiliary power system power module of claim 1, wherein:
the Boost circuit is used for boosting and stabilizing the fluctuating voltage, and the output voltage of the Boost circuit is used as the voltage input of the inverter circuit and the charger power unit; the overvoltage absorption circuit is used for absorbing overvoltage generated by the inverter circuit; the inverter circuit is used for providing output of three-phase pulsating alternating current voltage;
the pre-charging circuit is directly provided with input voltage by the Boost circuit and realizes the current-limiting charging of the voltage-stabilizing and discharging circuit; the high-frequency power conversion circuit converts a direct-current voltage into a square-wave voltage; and the rectification filter loop is used for rectifying and filtering the square wave voltage into stable direct current voltage and outputting the stable direct current voltage.
3. The auxiliary power system power module of claim 2, wherein: the Boost circuit comprises a first reactor, a first insulated gate bipolar transistor, a first diode, a first discharge resistor and a first support capacitor, wherein a circuit formed by the first insulated gate bipolar transistor and the first diode which are connected in series is respectively connected with the first discharge resistor and the first support capacitor in parallel; the overvoltage absorption circuit comprises a first insulated gate bipolar transistor pair and a first absorption resistor; the inverter circuit comprises a second insulated gate bipolar transistor pair, a third insulated gate bipolar transistor pair and a fourth insulated gate bipolar transistor pair, wherein the second insulated gate bipolar transistor pair, the third insulated gate bipolar transistor pair and the fourth insulated gate bipolar transistor pair are arranged in parallel;
the pre-charging circuit comprises a main contactor, a pre-charging contactor and a pre-charging resistor, and a circuit formed by connecting the pre-charging resistor and the pre-charging contactor in series is arranged in parallel with the main contactor; the voltage stabilizing and discharging circuit comprises a second discharging resistor and a second supporting capacitor, and the second discharging resistor and the second supporting capacitor are arranged in parallel; the high-frequency power conversion circuit comprises a first absorption capacitor, a second absorption capacitor, a fifth insulated gate bipolar transistor pair, a sixth insulated gate bipolar transistor pair, a second diode, a third diode, a blocking capacitor and a high-frequency transformer, wherein the first absorption capacitor and the second absorption capacitor are respectively connected with two insulated gate bipolar transistors of the fifth insulated gate bipolar transistor pair in parallel, the second diode and the third diode are respectively connected with the fifth insulated gate bipolar transistor pair and the sixth insulated gate bipolar transistor pair, and the blocking capacitor is respectively connected with an intermediate contact of the fifth insulated gate bipolar transistor pair and a primary side contact of the high-frequency transformer; the rectification and filtering circuit comprises a rectification loop and a filtering loop, and the rectification loop comprises a first RC absorption circuit, a second RC absorption circuit, a first rectification diode and a second rectification diode; the filtering loop comprises a first filter reactor, a second filter reactor, a filter capacitor, an output filter, a fuse and an anti-reverse diode.
4. The auxiliary power system power module of claim 3, wherein: the first insulated gate bipolar transistor and the first discharge resistor of the Boost circuit, and the overvoltage absorption circuit comprise a first insulated gate bipolar transistor pair and a first absorption resistor, and the second insulated gate bipolar transistor pair, the third insulated gate bipolar transistor pair and the fourth insulated gate bipolar transistor pair of the inverter circuit are arranged on the surface of the water-cooling substrate;
still install the support electric capacity mounting panel on the frame subassembly, first support electric capacity passes through support electric capacity mounting panel with the water-cooling base plate is close to the setting.
5. The auxiliary power system power module of claim 3, wherein: a charger driving plate and a charger top plate are arranged on one side, provided with the charger power unit, of the water-cooling base plate, and the charger driving plate and the charger top plate are arranged on the water-cooling base plate along the direction departing from the water-cooling base plate;
wherein the pre-charge resistor of the pre-charge circuit, the second discharge resistor of the voltage stabilizing and discharging circuit, the second diode, the third diode, the fifth insulated gate bipolar transistor pair, the sixth insulated gate bipolar transistor pair and the high-frequency transformer, the first RC absorption circuit, the second RC absorption circuit, the first and second rectifier diodes of the rectification circuit, and the anti-reverse diode of the filtering circuit are arranged on the surface of the water-cooled substrate;
the second supporting capacitor of the voltage stabilizing and discharging circuit, the first absorption capacitor of the high-frequency power conversion circuit, the second absorption capacitor and the blocking capacitor are integrated on the charger driving board;
the filter capacitor, the output filter and the fuse of the filter loop are integrated on the charger top plate.
6. The auxiliary power system power module of claim 4, wherein: the auxiliary inverter power unit device also comprises an auxiliary inverter laminated busbar, the auxiliary inverter laminated busbar comprises three layers, namely a negative electrode layer, a positive electrode layer and an alternating current layer, and the negative electrode layer, the positive electrode layer and the alternating current layer are insulated from each other; the negative electrode layer and the positive electrode layer are both L-shaped, and a first insulated gate bipolar transistor pair of the overvoltage absorption circuit, a second insulated gate bipolar transistor pair of the inverter circuit, a third insulated gate bipolar transistor pair and a fourth insulated gate bipolar transistor pair are connected with a first support capacitor of the Boost circuit through the negative electrode layer and the positive electrode layer of the auxiliary inverter laminated busbar; the alternating current layer is provided with four paths of outputs which are mutually insulated, the four paths of outputs of the alternating current layer are respectively connected with four copper bars, and the four copper bars are respectively connected with intermediate joints of the first insulated gate bipolar transistor pair, the second insulated gate bipolar transistor pair, the third insulated gate bipolar transistor pair and the fourth insulated gate bipolar transistor pair.
7. The auxiliary power system power module of claim 5, wherein: the main contactor and the pre-charging contactor of the pre-charging circuit are mounted on the frame assembly.
8. The auxiliary power system power module of claim 1, wherein: the auxiliary inverter control unit assembly is hinged to one side of the frame assembly.
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| CN110112933B (en) * | 2019-05-31 | 2020-09-25 | 中车青岛四方车辆研究所有限公司 | Auxiliary inverter |
| CN112224062B (en) * | 2019-06-30 | 2022-04-15 | 比亚迪股份有限公司 | Energy conversion device, power system and vehicle |
| CN110445398B (en) * | 2019-07-08 | 2021-11-26 | 中车永济电机有限公司 | SiC-MOSFET power unit |
| CN110323954B (en) * | 2019-08-08 | 2020-11-03 | 中车青岛四方车辆研究所有限公司 | Three-level traction power module based on SiC power device and inverter circuit |
| CN110481363B (en) * | 2019-08-26 | 2020-11-03 | 中车青岛四方车辆研究所有限公司 | Charger module and circuit |
| CN113659850B (en) * | 2021-08-18 | 2023-03-10 | 中车青岛四方车辆研究所有限公司 | Inversion module and high-frequency auxiliary converter equipment with same |
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| CN102638155B (en) * | 2012-03-21 | 2014-12-17 | 株洲南车时代电气股份有限公司 | Centralized auxiliary converter |
| CN203387829U (en) * | 2013-08-01 | 2014-01-08 | 深圳市英威腾交通技术有限公司 | Auxiliary source chamber |
| CN203522506U (en) * | 2013-10-23 | 2014-04-02 | 北京京铁信达铁路设备有限公司 | Auxiliary conversion charger module |
| CN204669061U (en) * | 2015-06-18 | 2015-09-23 | 南京华士电子科技有限公司 | A kind of two converter high-power charger circuit |
| CN106849724A (en) * | 2017-04-17 | 2017-06-13 | 中车青岛四方车辆研究所有限公司 | Auxiliary inverse power supply |
| CN108494264A (en) * | 2018-05-30 | 2018-09-04 | 西安中车永电电气有限公司 | A kind of highly integrated light-weighted power device |
| CN208630378U (en) * | 2018-07-26 | 2019-03-22 | 北京车和家信息技术有限公司 | It fills distribution assembly cabinet, fill distribution assembly and vehicle |
| CN109286327A (en) * | 2018-09-28 | 2019-01-29 | 中车大连电力牵引研发中心有限公司 | A kind of charger module |
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