Portable power supply device for 300T equipment

Abstract

The utility model discloses a portable power supply device of 300T equipment, including power module, interface module, protection module and display module, protection module is jointly composed by short circuit protection circuit, overcharge protection circuit and overheat protection circuit, short circuit protection circuit is composed by UC3842 chip, switch tube Q1, resistance R3, T1 transformer, R, C, D element and relevant connection circuit, wherein UC3842 is control core, R3 is the key current detection element, Q1 is power switch device, T1 plays energy transmission and transformation effect, R, C, D constitute buffer circuit auxiliary protection, the utility model discloses as emergency equipment, when the electric locomotive is not powered, can separate from the power supply of motor train unit itself, provides emergency power supply for 300T equipment, supports equipment data download, program upgrade and so on operation, reduces the time of waiting for the power of motor train unit, improves the maintenance efficiency, and single operation time can shorten more than 50%.

Description

Technical Field

[0001] This utility model relates to the field of power supply device technology, specifically to a portable power supply device for a 300T device. Background Technology

[0002] With the rapid development of technology and the upgrading of transportation tools, people now often choose high-speed trains as their means of transportation for long-distance travel. High-speed trains, also known as EMU trainsets, refer to a mode of transportation consisting of multiple vehicles that run on high-speed railways.

[0003] As is well known, high-speed trains rely primarily on railway conductors and pantographs for power during operation. When power is lost, it is impossible to inspect the train's electrical equipment or exchange stored data, thus reducing maintenance efficiency. Therefore, there is an urgent need to design a portable power supply device for 300T equipment to solve these problems. Utility Model Content

[0004] The purpose of this invention is to provide a portable power supply device for a 300T device to address the aforementioned shortcomings in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A portable power supply device for a 300T device includes a power module, an interface module, a protection module, and a display module;

[0007] The protection module consists of a short-circuit protection circuit, an overcharge protection circuit, and an overheat protection circuit.

[0008] The short-circuit protection circuit consists of a UC3842 chip, a switching transistor Q1, a resistor R3, a transformer T1, R, C, D components, and related connecting lines; among them, the UC3842 is the control core, R3 is the key current detection component, Q1 is a power switching device, T1 plays the role of energy transfer and conversion, and R, C, and D form a buffer circuit for auxiliary protection.

[0009] The overcharge protection circuit consists of a resistor R1, a Zener diode VS, a diode VD, a transistor VT, and related connecting lines; R1 serves to limit current and divide voltage, VS is used to stabilize the critical voltage, VD is a unidirectional conducting element, and VT is the core of the switch control, together forming the control loop for overcharge protection.

[0010] The overheat protection circuit consists of a light-emitting diode, a bidirectional thyristor TT102, a capacitor, a resistor Rr, and related connecting lines. The light-emitting diode can be used for status indication, TT102 is a key switching control element, and the capacitor and Rr constitute the auxiliary part of the charging, discharging, and control circuit.

[0011] Preferably, during normal operation, pin 6 of the UC3842 chip outputs a drive signal to control the on / off state of Q1, and the circuit performs power conversion and transmission according to a predetermined mode.

[0012] When a short circuit fault occurs in the circuit, the short circuit current will increase sharply, and the current flowing through R3 will rise significantly. The voltage across R3 will increase. The voltage across R3 is the voltage detected by pin 3 of the UC3842 chip. When this voltage exceeds the short circuit protection threshold set internally by the UC3842, the UC3842 will respond quickly by cutting off the drive signal output of pin 6, turning off Q1, thereby preventing the excessive short circuit current from continuing to flow and preventing damage to the equipment due to excessive short circuit current, thus realizing the short circuit protection function.

[0013] The buffer circuit composed of R, C, and D can absorb the peak voltage generated by components such as T1 during the Q1 turn-off process, thereby helping to protect the circuit components and improving the stability and reliability of the circuit.

[0014] Preferably, under normal charging conditions, the voltage in the circuit is within a reasonable range, the Zener diode VS is reverse cut off, the base of the transistor VT has no sufficient driving voltage and is in the cut-off state, the charging circuit is normally conducting, and it continuously supplies power and charges the device or battery;

[0015] When overcharging occurs, the charging voltage increases. When the voltage reaches the regulation value of the Zener diode VS, VS breaks down in reverse and conducts. After it conducts, it provides current to the base of the transistor VT, causing VT to switch from cutoff to conduction. After VT conducts, it will affect the voltage and current distribution of the charging circuit, thereby limiting the charging voltage from continuing to rise, or directly cutting off the main charging circuit to prevent overcharging from continuing. This avoids the battery from bulging, being damaged, or even causing safety hazards due to overcharging, thus achieving the overcharge protection function.

[0016] Preferably, under normal temperature conditions, if the temperature in the circuit does not reach the threshold for triggering protection, the bidirectional thyristor TT102 is in the off state, the power supply circuit or related controlled circuit remains normally connected, and the equipment can operate stably.

[0017] When the equipment overheats due to excessive load, poor heat dissipation, or other reasons, the temperature is transmitted to the overheat protection circuit. This causes components such as LEDs to trigger the conduction condition of the bidirectional thyristor TT102 due to the temperature. After TT102 conducts, it changes the current path of the original circuit or performs operations such as current diversion or short circuit on the main power supply circuit, ultimately cutting off the main power supply or limiting the power output. This forces the equipment to stop working or reduce power consumption, preventing equipment damage, performance degradation, or even fires and other safety accidents caused by continuous overheating, thus achieving the overheat protection function.

[0018] Preferably, the power module provides a stable voltage of 104V to the target unit or module of the EMU, which meets the operating voltage range of 77-137.5V of the equipment.

[0019] Preferably, the display module displays the remaining battery power and operating status (normal / abnormal) in real time.

[0020] In the above technical solution, the portable power supply device for a 300T device provided by this utility model has the following beneficial effects:

[0021] (1) As an emergency device, it can be disconnected from the power supply of the EMU when the EMU is out of power, and provide emergency power supply for the 300T equipment. It supports equipment data download, program upgrade and other operations, reduces the waiting time for the EMU to be powered on, improves maintenance efficiency, and can shorten the time of a single operation by more than 50%.

[0022] (2) Strong adaptability: According to the actual equipment connection requirements, power supply interfaces are set up to correspond to each unit (TCR unit, JRU unit, DMI unit, BTM unit) and module (VCU module, radio module) of the 300T ATP equipment, realizing the interface compatibility function of "one machine for multiple uses", meeting the power supply requirements of different modules, reducing the types and number of equipment to be repaired, and reducing maintenance costs.

[0023] (3) Safety protection measures are provided, including short circuit protection, overcharge protection, and overheat protection, to ensure the safety of equipment and operators, avoid equipment damage caused by circuit failure, and improve the safety and reliability of equipment use. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0025] Figure 1 This is an overall control schematic diagram for an embodiment of a portable power supply device for a 300T device according to the present invention.

[0026] Figure 2 This is a short-circuit protection circuit diagram provided for an embodiment of a portable power supply device for a 300T device according to the present invention.

[0027] Figure 3 This is an overcharge protection circuit diagram provided for an embodiment of a portable power supply device for a 300T device according to the present invention.

[0028] Figure 4 This is an overheat protection circuit diagram provided for an embodiment of a portable power supply device for a 300T device according to the present invention. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0030] like Figures 1-4 As shown in the figure, this utility model provides a portable power supply device for a 300T device, including a power module, an interface module, a protection module, and a display module; the protection module is composed of a short-circuit protection circuit, an overcharge protection circuit, and an overheat protection circuit; the short-circuit protection circuit consists of...

[0031] The circuit consists of a UC3842 chip, a switching transistor Q1, a resistor R3, a transformer T1, resistors, capacitors, diodes, and related connecting lines. The UC3842 acts as the control core, R3 is a key current sensing element, Q1 is a power switching device, and T1 performs energy transfer and conversion. R, C, and D form a buffer circuit for auxiliary protection. The overcharge protection circuit consists of a resistor R1, a Zener diode VS, a diode VD, a transistor VT, and related connecting lines. R1 limits current and divides voltage, VS stabilizes the critical voltage, VD is a unidirectional conducting element, and VT is the core of the switch control, together forming the control loop for overcharge protection. The overheat protection circuit consists of an LED, a bidirectional thyristor TT102, a capacitor, a resistor Rr, and related connecting lines. The LED provides status indication, TT102 is a key switch control element, and the capacitor and Rr form the auxiliary part of the charging / discharging and control loop.

[0032] This embodiment includes a power module, an interface module, a protection module, and a display module;

[0033] Specifically, the power module provides a stable voltage of 104V to the target unit or module of the EMU, which meets the equipment's operating voltage range of 77-137.5V.

[0034] Specifically, the display module shows the remaining battery power and operating status in real time, indicating normal or abnormal.

[0035] In this embodiment, the protection module is composed of a short-circuit protection circuit, an overcharge protection circuit, and an overheat protection circuit.

[0036] In this embodiment, the short-circuit protection circuit consists of a UC3842 chip, a switching transistor Q1, a resistor R3 (used for current sampling), a transformer T1, R, C, and D components, and related connecting lines; among them, UC3842 serves as the control core, R3 is the key current detection component, Q1 is a power switching device, T1 plays the role of energy transfer and conversion, and R, C, and D form a buffer circuit for auxiliary protection.

[0037] Specifically, during normal operation, the UC3842 chip outputs a drive signal from pin 6 to control the on / off state of Q1, and the circuit performs power conversion and transmission according to a predetermined mode.

[0038] When a short circuit fault occurs in the circuit, the short circuit current will increase sharply, and the current flowing through R3 will rise significantly. The voltage across R3 will increase. The voltage across R3 is the voltage detected by pin 3 of the UC3842 chip. When this voltage exceeds the short circuit protection threshold set internally by the UC3842, the UC3842 will respond quickly by cutting off the drive signal output of pin 6, turning off Q1, thereby preventing the excessive short circuit current from continuing to flow and preventing damage to the equipment due to excessive short circuit current, thus realizing the short circuit protection function.

[0039] The buffer circuit composed of R, C, and D can absorb the peak voltage generated by components such as T1 during the Q1 turn-off process, thereby helping to protect the circuit components and improving the stability and reliability of the circuit.

[0040] In this embodiment, the overcharge protection circuit consists of a resistor R1 (5W power), a Zener diode VS (1N4743), a diode VD (1N4002), a transistor VT (2N3055), and related connecting lines; among them, R1 serves as a current limiter and voltage divider, VS is used to stabilize the critical voltage, VD is a unidirectional conducting element, and VT is the core of the switch control, together forming the control loop for overcharge protection;

[0041] Specifically, under normal charging conditions, the voltage in the circuit is within a reasonable range, the Zener diode VS is reverse cut off, the base of the transistor VT has insufficient driving voltage and is in the cut-off state, the charging circuit is normally conducting, and it continuously supplies power and charges the device or battery.

[0042] When overcharging occurs, the charging voltage increases. When the voltage reaches the regulation value of the Zener diode VS, VS breaks down in reverse and conducts. After it conducts, it provides current to the base of the transistor VT, causing VT to switch from cutoff to conduction. After VT conducts, it will affect the voltage and current distribution of the charging circuit, thereby limiting the charging voltage from continuing to rise, or directly cutting off the main charging circuit to prevent overcharging from continuing. This avoids the battery from bulging, being damaged, or even causing safety hazards due to overcharging, thus achieving the overcharge protection function.

[0043] In this embodiment, the overheat protection circuit consists of a light-emitting diode, a bidirectional thyristor TT102, a capacitor, a resistor Rr, and related connecting lines; the light-emitting diode can be used for status indication assistance, TT102 is a key switching control element, and the capacitor and Rr constitute the auxiliary part of the charging, discharging, and control circuit.

[0044] Specifically, under normal temperature conditions, if the temperature in the circuit does not reach the threshold for triggering protection, the bidirectional thyristor TT102 is in the off state, the power supply circuit or related controlled circuit remains normally conductive, and the equipment can operate stably.

[0045] When the equipment overheats due to excessive load, poor heat dissipation, or other reasons, the temperature is transferred to the overheat protection circuit (which can be achieved through thermal coupling design with the heat-generating components, such as installation close to the heat-generating components). This causes components such as LEDs to trigger the conduction condition of the bidirectional thyristor TT102 due to temperature influence. After TT102 conducts, it changes the current path of the original circuit or performs operations such as current diversion or short circuit on the main power supply circuit, ultimately cutting off the main power supply or limiting the power output, forcing the equipment to stop working or reduce power consumption. This avoids equipment damage, performance degradation, or even safety accidents such as fires caused by continuous overheating, thus achieving the overheat protection function.

[0046] Operating Procedures: With the train de-energized, first disconnect the 300T ATP device from the train's power supply connector. Then connect the corresponding interface of the portable power supply unit to the device. Turn on the device's power supply. The power module provides a stable voltage (104V output, meeting the device's 77-137.5V operating voltage range) to the target unit or module. The display module shows the remaining power and operating status (normal / abnormal) in real time. After confirming the operating status is normal, the operator can proceed with maintenance work such as data download, program upgrade, and function verification. During operation, the protection module monitors the circuit status in real time. In case of abnormalities such as short circuit, overcharge, or overheating, it automatically cuts off the power supply for protection. After the operation is completed, disconnect the device from the equipment. The device can be quickly charged using mains power to prepare for the next use.

[0047] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A portable power supply device for a 300T device, characterized in that, It includes a power module, an interface module, a protection module, and a display module; The protection module consists of a short-circuit protection circuit, an overcharge protection circuit, and an overheat protection circuit. The short-circuit protection circuit consists of a UC3842 chip, a switching transistor Q1, a resistor R3, a transformer T1, R, C, and D components, and related connecting lines. Among them, UC3842 is the control core, R3 is the key current sensing element, Q1 is the power switching device, T1 plays the role of energy transfer and conversion, and R, C and D form a buffer circuit for auxiliary protection. The overcharge protection circuit consists of a resistor R1, a Zener diode VS, a diode VD, a transistor VT, and related connecting lines; R1 serves to limit current and divide voltage, VS is used to stabilize the critical voltage, VD is a unidirectional conducting element, and VT is the core of the switch control, together forming the control loop for overcharge protection. The overheat protection circuit consists of a light-emitting diode, a bidirectional thyristor TT102, a capacitor, a resistor Rr, and related connecting lines. The light-emitting diode can be used for status indication, TT102 is a key switching control element, and the capacitor and Rr constitute the auxiliary part of the charging, discharging, and control circuit.

2. The portable power supply device for a 300T device according to claim 1, characterized in that, During normal operation, the UC3842 chip outputs a drive signal from pin 6 to control the on / off state of Q1, and the circuit performs power conversion and transmission according to a predetermined mode. When a short circuit fault occurs in the circuit, the short circuit current will increase sharply, and the current flowing through R3 will rise significantly. The voltage across R3 will increase. The voltage across R3 is the voltage detected by pin 3 of the UC3842 chip. When this voltage exceeds the short circuit protection threshold set internally by the UC3842, the UC3842 will respond quickly by cutting off the drive signal output of pin 6, turning off Q1, thereby preventing the excessive short circuit current from continuing to flow and preventing damage to the equipment due to excessive short circuit current, thus realizing the short circuit protection function. The buffer circuit composed of R, C, and D can absorb the peak voltage generated by the T1 component during the Q1 turn-off process, thereby helping to protect the circuit components and improving the stability and reliability of the circuit.

3. The portable power supply device for a 300T device according to claim 1, characterized in that, Under normal charging conditions, the voltage in the circuit is within a reasonable range, the Zener diode VS is reverse cut off, the base of the transistor VT has insufficient driving voltage and is in the cut-off state, the charging circuit is normally connected, and it continuously supplies power and charges the device or battery. When overcharging occurs, the charging voltage increases. When the voltage reaches the regulation value of the Zener diode VS, VS breaks down in reverse and conducts. After it conducts, it provides current to the base of the transistor VT, causing VT to switch from cutoff to conduction. After VT conducts, it will affect the voltage and current distribution of the charging circuit, thereby limiting the charging voltage from continuing to rise, or directly cutting off the main charging circuit to prevent overcharging from continuing. This avoids the battery from bulging, being damaged, or even causing safety hazards due to overcharging, thus achieving the overcharge protection function.

4. The portable power supply device for a 300T device according to claim 1, characterized in that, Under normal temperature conditions, if the temperature in the circuit does not reach the threshold for triggering protection, the bidirectional thyristor TT102 is in the off state, the power supply circuit or related controlled circuit remains normally conductive, and the equipment can operate stably. When the equipment overheats due to excessive load or poor heat dissipation, the temperature is transmitted to the overheat protection circuit. This causes the LED element to trigger the conduction condition of the bidirectional thyristor TT102 due to the temperature. After TT102 conducts, it changes the current path of the original circuit or performs current diversion or short-circuit operation on the main power supply circuit, ultimately cutting off the main power supply or limiting the power output. This forces the equipment to stop working or reduce power consumption, avoiding equipment damage, performance degradation, or even fire safety accidents caused by continuous overheating, thus realizing the overheat protection function.

5. A portable power supply device for a 300T device according to claim 1, characterized in that, The power module provides a stable voltage of 104V to the target unit or module of the EMU, which meets the equipment's operating voltage range of 77-137.5V.

6. A portable power supply device for a 300T device according to claim 1, characterized in that, The display module displays the remaining battery power and operating status (normal / abnormal) in real time.

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