Cooling fan system for bidirectional converter crowbar module

Abstract

The utility model provides a cooling fan system for a crossbar module of a bidirectional converter, which belongs to the technical field of bidirectional converters of flexible direct-current traction power supply systems and comprises a power supply switching module, a driving control module, a fan driving module and a fan set. The power supply switching module converts module power supply voltage into working voltage required by the driving control module and the fan driving module, and the fan driving module performs data interaction with the driving control module through a data interface so as to control a fan to act and receive a fan signal; according to the utility model, the power supply stability, the installation flexibility, the electric energy saving performance and the like are obviously improved, the maneuverability of the flexible DC traction bidirectional converter crowbar modularization is improved and enhanced, and more installation choices are provided for users.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the flexible DC traction power supply system bidirectional converter technical field especially, it relates to a kind of cooling fan systems for bidirectional converter crowbar module. BACKGROUND

[0002] Flexible DC traction bidirectional converter crowbar module cooling fan system is one of the key technologies of the heat dissipation system of urban rail transit flexible DC traction power supply system, in flexible DC traction power supply system, part of the device of module can generate a large amount of heat in the running process, if heat cannot be dissipated in time, it can cause module device to work in normal state, even possibly cause device damage, so it needs to install heat dissipation device to module to reduce the harm caused by heat.

[0003] Traditional flexible DC traction power supply system bidirectional converter commonly used heat dissipation mode is water cooling and air cooling, wherein water cooling is commonly used in large heat dissipation working environment, air cooling is commonly used in small heat dissipation, good ventilation condition working environment;Such as patent CN202411717825.5 provides a kind of air-cooled energy storage converter and converter unit, by optimizing structure layout and air duct structure, the flow direction of wind can be controlled, ensure the smoothness of air flow and the efficiency of cooling, can be targeted for heat dissipation, ensure that in the case of built-in a fan, let wind flow according to the set route, to achieve the purpose of heat dissipation, avoid external fan or built-in multiple fan problem;By installing different functional modules at different positions, and separating the heat dissipation path of power module and reactor, so that the heat of different modules can not interfere with each other, and ensure that heat will not gather inside the cabinet, can improve the overall heat dissipation efficiency, and special air duct design facilitates the disassembly of air duct and internal module, reduces the influence on the whole converter caused by single module failure, can improve the convenience of maintenance.

[0004] Since crowbar is only started when overvoltage condition occurs in bidirectional converter, not real-time work, so the heat dissipation device of crowbar module does not need to circulate water cooling with other high-power devices, and fan also does not need to work continuously, fan only acts in a period of time after crowbar action, so that more electric energy can be saved under the same heat dissipation condition of crowbar module;Traditional cooling fan is relatively large, which makes the installation of crowbar module more limited, using multiple small fans can effectively dissipate heat in the small distance extension space of crowbar module, and reduce the space occupation.

[0005] In order to overcome the above problems, it is necessary to develop a new type of crowbar module cooling fan system, which is related to the interaction of the driving control board with the driving board and the fan, uses multiple small fans to cool the specified position and promote air circulation, solves the problem of large space occupation and energy consumption when the crowbar is not working, and provides a more energy-saving and lighter solution for the modularization of the modern rail transit flexible DC traction power supply system. Content of the utility model

[0006] In order to solve the above problems, the utility model provides a kind of cooling fan system for bidirectional converter crowbar module, improve the linkage of fan and control signal, reduce the space required by fan, to realize the power stability of system, installation flexibility and electric energy saving.

[0007] The utility model solves the above problems by using the following technical scheme:

[0008] A kind of cooling fan system for bidirectional converter crowbar module, including power adapter module, driving control module, fan driving module and fan group, the power adapter module is connected with driving control module, fan driving module and provides the working voltage required for its work, the fan driving module includes data interface, signal transceiver component, wiring socket, the fan driving module carries out data interaction with driving control module by data interface, the wiring socket is connected with fan group, and the fan group is connected with driving control module signal by fan driving module.

[0009] Further, the power adapter module includes mains power supply interface module, EMC module, fuse, AC / DC converter, 15V voltage output interface module, the mains power supply interface module is connected with mains to provide power input, the EMC module is connected with mains power supply interface module to ensure electromagnetic compatibility of electronic equipment, the fuse is connected with EMC module and AC / DC converter for overcurrent protection, the AC / DC converter converts 220V alternating current of mains into 15V direct current, and the 15V voltage output interface module is connected with AC / DC converter.

[0010] Further, the driving control module includes bidirectional converter crowbar module and driving control part, the driving control part controls the start-stop of fan, and the bidirectional converter crowbar module is integrated in a PCB board with the driving control part.

[0011] Further, the fan driving module includes interface circuit part and power supply part, the data interface and signal transceiver component belong to interface circuit part, and the wiring socket belongs to power supply part.

[0012] Further, the signal transceiver assembly comprises a PWM signal correction module and an RS-485 transceiver, the interface circuit part further comprises an optocoupler isolation module, the data interface, the PWM signal correction module, the RS-485 transceiver and the optocoupler isolation module are sequentially connected, and the other end of the optocoupler isolation module is connected with the power supply part.

[0013] Further, the data interface transmits signals of the drive control module and the fan drive module, the PWM signal correction module transmits the PWM control signal from the data interface to the RS-485 transceiver after signal correction, the RS-485 transceiver is used for receiving and sending instructions to the drive control board, and the optocoupler isolation module is used for protecting the circuit from electromagnetic interference.

[0014] Further, the wiring socket is a four-terminal wiring socket, the power supply part further comprises a three-terminal wiring socket, a DC / DC voltage boosting module, a DC / DC voltage reducing module, a power-on display module and a fault detection module, the three-terminal wiring socket is connected with the DC / DC voltage boosting module, the DC / DC voltage reducing module and the power-on display module respectively, the DC / DC voltage boosting module is connected with the four-terminal wiring socket, the four-terminal wiring socket is further connected with the fault circuit, and the other end of the fault detection module is connected with the interface circuit part.

[0015] Further, the three-terminal wiring socket is used for connecting the 15V voltage output interface module in the power supply switching module, the DC / DC voltage boosting module converts DC 15V input into DC 24V output, the DC / DC voltage reducing module converts DC 15V into DC 5V output, the power-on display module is a light-emitting diode connected with 15V voltage through a resistor to display 15V power supply connection, the detection end of the fault detection module is connected with the four-terminal wiring socket, and the four-terminal wiring socket outputs PWM signals and 24V voltage connected with the fan through the socket feedback.

[0016] Further, the fan group adopts the fan with the PWM function, and the fan is connected with the fan drive module.

[0017] The flexible DC traction bidirectional converter crowbar module cooling fan system has the advantages that:

[0018] 1. The flexible DC traction bidirectional converter crowbar module cooling fan system is obviously improved on the basis of the prior art, the circuit structure and the connection between the modules are reasonably selected, and the power stability, the installation flexibility, the power saving and the like are obviously improved.

[0019] 2. The power switching module is improved to supply stable power output for the whole crowbar module cooling fan system, and the reliable operation of the whole cooling fan system is ensured.

[0020] 3. By selecting multiple small fans instead of one large fan, the ventilation can be arranged flexibly around the crowbar module, the space occupation of the crowbar module and the fan cooling system can be reduced, and the installation is more flexible and more operable.

[0021] 4. By controlling the output PWM signal through the program in the drive control board, the fan can be started to cool down after a period of time after the crowbar module starts to work, so that the continuous start of the fan can be avoided to consume more electric energy. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the specific embodiments of the present application, the drawings needed in the description of the specific embodiments will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of these drawings.

[0023] Figure 1 The connection structure schematic diagram of the whole embodiment of the present application is shown in the figure.

[0024] Figure 2 The connection structure schematic diagram of the power adapter module of the embodiment of the present application is shown in the figure.

[0025] Figure 3 The connection structure schematic diagram of the fan drive module interface circuit part and the fan set of the embodiment of the present application is shown in the figure.

[0026] Figure 4 The connection structure schematic diagram of the power supply part of the fan drive module of the embodiment of the present application is shown in the figure. DETAILED DESCRIPTION

[0027] In the description of the present application, it should be pointed out that, unless otherwise explicitly specified and limited, the term "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication and connection between two elements. For those skilled in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.

[0028] As Figure 1As shown, the utility model provides a kind of cooling fan system for bidirectional converter crowbar module, including power adapter module, drive control module, fan drive module and fan set, the power adapter module is connected with drive control module, fan drive module respectively and provides the working voltage required for its work, the fan drive module includes data interface, signal transceiver component, wiring jack, the fan drive module carries out data interaction with drive control module by data interface, the wiring jack is connected with fan set, the fan set is connected with drive control module signal by fan drive module, fan set adopts the fan with PWM function, fan is connected with fan drive module respectively, can be started in the certain time of crowbar action by the connecting conductor of drive board, control fan.

[0029] In the embodiment, drive control module is connected with fan drive module, fan drive module is connected with multiple fans, the fan drive module carries out data interaction with drive control module by data interface, and fan action is controlled by this, and drive control board can be fed back by the signal returned by fan.

[0030] As Figure 2 As shown, power adapter module includes mains power supply interface module, EMC module, fuse, AC / DC converter, 15V voltage output interface module, mains power supply interface module connects mains to provide power input, EMC module connects mains power supply interface module to ensure electromagnetic compatibility of electronic equipment, fuse connects EMC module and AC / DC converter for overcurrent protection, AC / DC converter converts 220V alternating current of mains into 15V direct current, and 15V voltage output interface module is connected with AC / DC converter.

[0031] Drive control module includes bidirectional converter crowbar module and drive control part (not shown in the figure), and drive control part controls the start-stop of fan, and bidirectional converter crowbar module is integrated with drive control part in a PCB.

[0032] Fan drive module includes interface circuit part and power supply part, data interface and signal transceiver component belong to interface circuit part, and wiring jack belongs to power supply part.

[0033] As Figure 1 , Figure 3As shown, the signal transceiver assembly includes a PWM signal correction module and an RS-485 transceiver, the interface circuit part further includes an optocoupler isolation module, the data interface, the PWM signal correction module, the RS-485 transceiver, and the optocoupler isolation module are sequentially connected, the other end of the optocoupler isolation module is connected with the power supply part, the signal receiving end is connected to the data interface through the optocoupler isolation module, the RS-485 transceiver, and the PWM signal correction module, and the optocoupler isolation module is connected with the fault detection module; the data interface transmits signals between the drive control board part and the drive board part, the PWM signal correction module transmits the PWM control signal from the data interface to the RS-485 transceiver after correction, the RS-485 transceiver receives and sends instructions to the drive control board, and the optocoupler isolation module is used for protecting the circuit from electromagnetic interference.

[0034] In the embodiment, the data interface transmits signals from the PCB board part of the drive control module, the PWM signal correction module filters differential mode and common mode interference from the PWM control signal from the data interface, and performs voltage pull-up on the signal voltage, and transmits the signal to the RS-485 transceiver, the RS-485 transceiver receives and sends instructions to the drive control module, respectively receives the start-stop fan signal of the drive control module and sends the fan fault detection signal, the optocoupler isolation module is electrically isolated through the TLP2355 chip to avoid strong electromagnetic interference caused by high voltage when the transmission signal is subjected to crowbar action; after the RS-485 transceiver receives the differential signal from the PWM signal correction module, the RS-485 transceiver sends the FAN_EN signal to the optocoupler isolation module, and converts the FAN_PWM signal to transmit the fan group start-stop signal to the four-terminal wiring socket; when the voltage difference of the port connected with the four-terminal wiring socket is abnormal, the fault detection module transmits the fault signal FAN_ERR to the optocoupler isolation module, converts it into the signal FAN_ERR_TX, and transmits it to the RS-485 transceiver, converts it into a differential signal, and feeds back to the data interface and sends it to the drive control board to feed back the fault condition.

[0035] As shown in Figure 1 , Figure 4 The wiring socket is a four-terminal wiring socket, the power supply part further includes a three-terminal wiring socket, a DC / DC boost module, a DC / DC buck module, a power-on display module, and a fault detection module, the three-terminal wiring socket is connected with the DC / DC boost module, the DC / DC buck module, and the power-on display module, the DC / DC boost module is connected with the four-terminal wiring socket, the four-terminal wiring socket is further connected with the fault circuit, and the other end of the fault detection module is connected with the interface circuit part.

[0036] In the embodiment, the three-terminal wiring socket is used for connecting the power adapter module 15V voltage output interface module, the DC / DC voltage boosting module converts the direct current 15V input into direct current 24V output, the output is connected to the four-terminal wiring socket to provide 24V for it, the DC / DC voltage reducing module converts the direct current 15V into direct current 5V output, the 5V voltage is the power supply voltage of the fault detection chip, the energized display module is a light emitting diode connected with the 15V voltage through a resistor to display the 15V power supply connection condition, the fault detection module detection end is connected with the four-terminal wiring socket, when the 15V power supply is normal, the light emitting diode emits light, the output PWM signal is connected with the 24V voltage and the fan, at the same time, the feedback voltage transmitted by the fan is also transmitted, the wiring socket feedback four-terminal wiring socket output PWM signal is connected with the 24V voltage and the fan.

[0037] The utility model is described in detail through the embodiment above, the content described in the utility model is only the preferred embodiment of the utility model, and cannot be considered as used for limiting the implementation scope of the utility model. All equivalent changes and improvements made according to the utility model application scope should still belong to the patent coverage scope of the utility model.

Claims

1. A cooling fan system for a bidirectional converter crowbar module, characterized in that: The system includes a power adapter module, a drive control module, a fan drive module, and a fan unit. The power adapter module is connected to the drive control module and the fan drive module respectively and provides them with the operating voltage required for their operation. The fan drive module includes a data interface, a signal transceiver component, and a wiring socket. The fan drive module interacts with the drive control module through the data interface. The wiring socket is connected to the fan unit. The fan unit is connected to the drive control module through the fan drive module.

2. The cooling fan system for a bidirectional converter crowbar module according to claim 1, characterized in that: The power conversion module includes an AC power supply interface module, an EMC module, a fuse, an AC / DC converter, and a 15V voltage output interface module. The AC power supply interface module connects to the AC power supply to provide power input. The EMC module connects to the AC power supply interface module to ensure the electromagnetic compatibility of the electronic equipment. The fuse connects the EMC module and the AC / DC converter for overcurrent protection. The AC / DC converter converts the 220V AC power from the AC power supply to 15V DC power. The 15V voltage output interface module connects to the AC / DC converter.

3. The cooling fan system for a bidirectional converter crowbar module according to claim 1, characterized in that: The drive control module includes a bidirectional converter crowbar module and a drive control section. The drive control section controls the start and stop of the fan. The bidirectional converter crowbar module and the drive control section are integrated on a single PCB board.

4. The cooling fan system for a bidirectional converter crowbar module according to claim 1, characterized in that: The wind turbine drive module includes an interface circuit section and a power supply section. The data interface and signal transceiver components belong to the interface circuit section, and the wiring socket belongs to the power supply section.

5. A cooling fan system for a bidirectional converter crowbar module according to claim 4, characterized in that: The signal transceiver component includes a PWM signal correction module and an RS-485 transceiver. The interface circuit section also includes an optocoupler isolation module. The data interface, PWM signal correction module, RS-485 transceiver, and optocoupler isolation module are connected in sequence. The other end of the optocoupler isolation module is connected to the power supply section.

6. A cooling fan system for a bidirectional converter crowbar module according to claim 5, characterized in that: The data interface transmits signals between the drive control module and the fan drive module. The PWM signal correction module corrects the PWM control signal from the data interface and transmits it to the RS-485 transceiver. The RS-485 transceiver is used to receive and send commands to the drive control board. The optocoupler isolation module is used to protect the circuit from electromagnetic interference.

7. A cooling fan system for a bidirectional converter crowbar module according to claim 4, characterized in that: The wiring connector is a four-terminal connector. The power supply section also includes a three-terminal connector, a DC / DC boost module, a DC / DC buck module, a power-on display module, and a fault detection module. The three-terminal connector is connected to the DC / DC boost module, the DC / DC buck module, and the power-on display module, respectively. The DC / DC boost module is connected to the four-terminal connector. The four-terminal connector is also connected to the fault circuit. The other end of the fault detection module is connected to the interface circuit section.

8. A cooling fan system for a bidirectional converter crowbar module according to claim 7, characterized in that: The three-terminal connector is used to connect to the 15V voltage output interface module in the power conversion module. The DC / DC boost module converts the DC 15V input to DC 24V output, and the DC / DC buck module converts the DC 15V to DC 5V output. The power-on display module is an LED, which is connected to the 15V voltage through a resistor to display the 15V power supply connection status. The fault detection module's detection end is connected to the four-terminal connector, and the connector feeds back the PWM signal and 24V voltage output from the four-terminal connector to the fan.

9. A cooling fan system for a bidirectional converter crowbar module according to any one of claims 1-8, characterized in that: The fan unit uses fans with PWM function, and the fans are connected to the fan drive module.

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