CN218888399U

CN218888399U - Direct-current voltage conversion module

Info

Publication number: CN218888399U
Application number: CN202222238382.4U
Authority: CN
Inventors: 栾凤仁; 徐成丽; 陈新; 鞠宏伟
Original assignee: Tianjin Railway Signal Co Ltd
Current assignee: Tianjin Railway Signal Co Ltd
Priority date: 2022-08-23
Filing date: 2022-08-23
Publication date: 2023-04-18
Anticipated expiration: 2032-08-23

Abstract

The utility model discloses a direct current voltage conversion module, wherein an external direct current voltage anode input end Vin1+ is connected with a switch S1 through a fuse F1; the negative input end Vin 1-of the external direct current voltage is connected with S1; the fixed contact a of the S1 is respectively connected with the diode D1 and the inductor L1; the other end of the D1 and the L1 are converged and intersected and then connected with the piezoresistors RP1, RP2 and D2; d2 is respectively connected with the capacitors C1 and C2 and the power module V1; the fixed contact b of the S1 is respectively connected with RP2, RP3, C1, C2 and V1; v1 is respectively connected with one end of C3 and one end of F2; the other end of the F2 is connected with a direct-current voltage anode output end Vout2 +; v1 is respectively connected with C3 and F3; f3 is connected with a negative output end Vout 2-of the direct current voltage; the utility model discloses possess multiple protect function, can be with the higher DC voltage of external input, stably convert the output behind the lower DC voltage into, realize reliable power supply.

Description

Direct-current voltage conversion module

Technical Field

The utility model relates to a railway system equipment power supply unit technical field especially relates to a direct current voltage conversion module.

Background

With the high-speed development of power electronic technology, the number of electric equipment in railway vehicle equipment is increasing, and the electric equipment can not be used without a reliable power supply.

Because the voltage of the power supply inside the railway vehicle equipment is high (mostly DC 74V), and the working voltage of many electric devices is DC24V, which is lower than the voltage of the power supply inside the railway vehicle equipment, the voltage of the power supply inside the existing railway vehicle equipment cannot meet the power supply requirements of the electric devices.

Therefore, there is a need to develop a technology that can solve the above-mentioned technical problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a direct current voltage conversion module to the technical defect that prior art exists.

Therefore, the utility model provides a direct current voltage conversion module, which comprises fuses F1-F3, a switch S1, diodes D1-D2, an inductor L1, piezoresistors RP 1-RP 3, capacitors C1-C3, light emitting diodes LED 1-LED 2 and a power module V1;

an external direct-current voltage positive input end Vin1+ is connected with one end of a fuse F1;

the other end of the fuse F1 is connected with one end of a movable arm X of the switch S1;

an external direct-current voltage negative electrode input end Vin 1-is connected with one end of a movable arm Y of the switch S1;

a fixed contact a of the switch S1 is respectively connected with the cathode of the diode D1 and one end of the inductor L1;

the anode of the diode D1 and the other end of the inductor L1 are converged and intersected at a node A;

the node A is respectively connected with one end of the piezoresistor RP1, one end of the piezoresistor RP2 and the anode of the diode D2;

the cathode of the diode D2 is respectively connected with one end of the capacitor C1, one end of the capacitor C2 and the 1 st pin of the power module V1;

the fixed contact b of the switch S1 is respectively connected with the other end of the piezoresistor RP2, one end of the piezoresistor RP3, the other end of the capacitor C1, the other end of the capacitor C2 and the 4 th pin of the power module V1;

a 9 th pin of the power module V1 is respectively connected with one end of the capacitor C3 and one end of the fuse F2;

the other end of the fuse F2 is connected with a direct-current voltage anode output end Vout2 +;

the 5 th pin of the power module V1 is respectively connected with the other end of the capacitor C3 and one end of the fuse F3;

the other end of the fuse F3 is connected with a DC voltage cathode output end Vout 2-.

Preferably, the device further comprises an input display circuit;

the input display circuit comprises a light emitting diode LED1 and a resistor R1;

the anode of the light-emitting diode LED1 is connected with the cathode of the diode D2;

the cathode of the light emitting diode LED1 is connected with one end of the resistor R1;

the other end of the resistor R1 is connected to the fixed contact b of the switch S1.

Preferably, the display device further comprises an output display circuit;

the output display circuit comprises a light emitting diode LED2 and a resistor R6;

the anode of the light emitting diode LED2 is connected with the 9 th pin of the power supply module V1;

the cathode of the light emitting diode LED2 is connected with one end of the resistor R6;

the other end of the resistor R6 is connected with the 5 th pin of the power supply module V1.

Preferably, the device also comprises resistors R2-R5;

the 9 th pin of the power module V1 is connected with one end of the resistor R2;

the 5 th pin of the power module V1 is connected with one end of the resistor R5;

the other end of the resistor R2 is respectively connected with the 8 th base pin of the power module V1 and one end of the resistor R3;

the other end of the resistor R3 is respectively connected with the 7 th base pin of the power module V1 and one end of the resistor R4;

the other end of the resistor R4 is respectively connected with the 6 th pin of the power module V1 and the other end of the resistor R5.

Preferably, the external direct-current voltage negative electrode input end Vin 1-is connected with a power ground GND1;

the negative output end Vout 2-of the direct current voltage is connected with a power ground GND2;

the other end of the piezoresistor RP1 and the other end of the piezoresistor RP3 are connected with a ground wire EGND.

Preferably,

pins

2 and 3 of the power module V1 are left empty.

Preferably, the fuses F1, F2, and F3 are each 5A/250V fuses.

Preferably, the dc voltage conversion module includes a module housing;

a switch S1, a fuse F1 mounting seat, a fuse F2 mounting seat, a fuse F3 mounting seat and a shell grounding point are arranged on the left side of the module shell;

a direct current voltage output terminal and an external direct current voltage input terminal are arranged on the right side of the module shell;

the front side of the module shell is provided with a plurality of mutually parallel power supply shell cooling fins.

By above the technical scheme the utility model provides a it is visible, compare with prior art, the utility model provides a direct current voltage conversion module, its structural design science possesses input overvoltage protection, input overcurrent protection, functions such as output current-limiting protection and output short-circuit protection, can be with the higher direct current voltage of external input (for example 72 ~ 110V within range direct current voltage), stable conversion is output after lower direct current voltage (24V direct current voltage) to can reliably supply power for the direct current voltage consumer including the inside consumer of railway vehicle equipment, ensure these consumers's normal use, great practical significance has.

Drawings

Fig. 1 is a schematic diagram of a dc voltage conversion module provided by the present invention;

fig. 2 is a schematic diagram of a front side of a housing according to an embodiment of the present invention;

fig. 3 is a left side view of an external appearance of a housing according to an embodiment of the dc voltage converting module provided by the present invention;

fig. 4 is a right side view of the external appearance of the casing according to an embodiment of the present invention.

Detailed Description

The technical solution of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it should be understood that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Referring to fig. 1 to 4, the utility model provides a dc voltage conversion module, which can provide stable dc24V voltage for the electric equipment on the railway locomotive, comprising fuses F1 (fuse) -F3, a switch S1, diodes D1-D2, an inductor L1, piezoresistors RP 1-RP 3, capacitors C1-C3, light emitting diodes LED 1-LED 2 and a power module V1;

an external direct-current voltage positive input end Vin1+ is connected with one end of a fuse F1 (fuse);

the other end of the fuse F1 is connected to one end of a movable arm (i.e., an operation arm) X of the switch S1;

it should be noted that, to the utility model discloses, through setting up inductance L1 and diode D1, can play the effect that the buffering was discharged in the twinkling of an eye of circular telegram.

the cathode of the diode D2 is respectively connected to one end of the capacitor C1, one end of the capacitor C2, and the 1 st pin (i.e., pin Vin +) of the power module V1;

the fixed contact b of the switch S1 is respectively connected with the other end of the piezoresistor RP2, one end of the piezoresistor RP3, the other end of the capacitor C1, the other end of the capacitor C2 and the 4 th pin (namely the pin Vin-) of the power module V1;

the 9 th pin (i.e., pin + Vout) of the power module V1 is connected to one end of the capacitor C3 and one end of the fuse F2, respectively;

the 5 th pin (i.e. pin-Vout) of the power module V1 is respectively connected with the other end of the capacitor C3 and one end of the fuse F3;

the other end of the fuse F3 is connected with a DC voltage cathode output end Vout 2-;

the utility model discloses in, on specifically realizing, outside direct current voltage positive input terminal Vin1+ and outside direct current voltage negative input terminal Vin1-, can be 72V ~ 110V's outside DC power supply's positive output and negative output, preferably 74V's outside DC power supply's positive output and negative output.

In the present invention, in particular, the dc voltage conversion module of the present invention further includes an input display circuit;

It should be noted that, in the present invention, the light emitting diode LED1 and the resistor R1 constitute an input display circuit for lighting the light emitting diode LED1 when an external voltage is input.

In the present invention, in particular, the dc voltage conversion module of the present invention further comprises an output display circuit;

the anode of the light emitting diode LED2 is connected with the 9 th pin (namely pin + Vout) of the power supply module V1;

the cathode of the light-emitting diode LED2 is connected with one end of the resistor R6;

the other end of the resistor R6 is connected to the 5 th pin (i.e., pin-Vout) of the power module V1.

It should be noted that, in the utility model discloses in, emitting diode LED2 constitutes output display circuit with resistance R6 for when power module V1 normal output voltage, light emitting diode LED2.

In the present invention, in particular, the dc voltage conversion module of the present invention further includes resistors R2 to R5;

the 9 th pin (i.e. pin + Vout) of the power module V1 is connected to one end of the resistor R2;

the 5 th pin (i.e. pin-Vout) of the power module V1 is connected with one end of the resistor R5;

the other end of the resistor R2 is respectively connected with the 8 th pin (namely pin + Sense) of the power module V1 and one end of the resistor R3;

the other end of the resistor R3 is respectively connected with the 7 th pin (namely a pin Trim) of the power module V1 and one end of the resistor R4;

the other end of the resistor R4 is connected to the 6 th pin (i.e., pin-Sense) of the power module V1 and the other end of the resistor R5, respectively.

It should be noted that the resistors R2, R3, R4, and R5 are pull-up resistors (i.e., pull-up resistors), which can ensure the stability of the output power of the power module V1.

In the utility model, in the concrete implementation, the negative input end Vin 1-of the external direct current voltage is grounded (in particular to the ground wire GND1 of the power supply);

the negative output terminal Vout 2-of the direct current voltage is grounded (specifically, connected to the ground GND 2).

In the present invention, in the specific implementation, the switch S1 may be an existing breaker switch or an existing double-pole single-throw toggle switch (specifically, a toggle-type toggle switch).

In the present invention, in particular, the other end of the varistor RP1 and the other end of the varistor RP3 are grounded (specifically, grounded ground line EGND).

The utility model discloses in, specifically realize, power module V1's 2 nd pin (PC pin) and 3 rd pin (PR pin) are vacant.

In the utility model, the piezoresistors RP 1-RP 3 can be the existing type TVR20221 piezoresistors, and the voltage-dependent voltage is 220V, which is used to provide the input overvoltage protection function;

the utility model discloses in, in the concrete realization, diode D2 is the diode that prevents flowing backward (prevent flowing backward promptly), plays the effect that prevents the electric current and flow backward.

The utility model discloses in, on specifically realizing, electric capacity C1 and C2, mainly exert filtering and afterflow effect, when input voltage instantaneous fluctuation is great, can play absorption and discharge effect. In the concrete implementation, the capacitors C1 and C2 are electrolytic capacitors with the model number of 250V/2200uF, and play a role in stabilizing voltage and continuing current.

In the utility model, in the concrete implementation, the capacitor C3 can specifically adopt the electrolytic capacitor with the model of 50V/1000 uF.

The utility model discloses in, on specifically realizing, emitting diode LED1 and LED2 all can adopt the diameter to be 3 mm's green luminotron.

The utility model discloses in, on specifically realizing, resistance R1 and R6 are emitting diode LED1 and LED 2's brightness control resistance respectively, can suitably adjust in emitting diode operating current within range for change luminous luminance.

The utility model discloses in, on specifically realizing, resistance R2 ~ R4 is output voltage and revises feedback resistance, and the resistance is zero, and the primary function is current-limiting and jam-proof.

The utility model discloses in, in the concrete realization, fuses F1, F2 and F3 are 5A/250V's fuse.

It should be noted that, in the present invention, the external dc voltage positive input terminal Vin1+ is connected to the fuse F1 (fuse), and the fuse F1 (fuse) is used as an overload protection component of the input current. Fuses F2 and F3 are output overcurrent protection elements.

The utility model discloses in, specifically realize, power module V1 is the power module of prior art maturity, specifically can adopt the model to be V72B24T 250's power module, and this power module V1's input voltage scope is DC 72V ~ 110V, and rated power is 250W, and output voltage is DC24V, and operating temperature-40 ℃ - +100 ℃, and simultaneously, power module V1 internal integration exports functions such as short-circuit protection and output overvoltage protection.

In a specific implementation, an input end of the power module V1 is inputted by a DC power supply of DC74V, wherein DC74V + (a positive terminal) is inputted to a 1 st pin (Vin +) of the power module V1, and DC 74V- (a negative terminal) is inputted to a 4 th pin (Vin-) of the power module V1;

the 9 th pin of the power module V1 outputs DC24V + (i.e., as Vout2 +), and the 5 th pin of the power module V1 outputs DC 24V- (i.e., as Vout 2-). At this time, the resistors R2, R3, R4, and R5 are pull-up resistors (i.e., pull-up resistors), which can ensure the stability of the output power of the power module V1.

In particular, the power module V1 may specifically adopt a power module manufactured by huai ge (VICOR) corporation and having a model number of V72B24T250, an input voltage range of the power module may be 43 to 110VAC, an operating temperature range of-40 to 100 ℃, and the power module has a protection function of outputting short circuit, overcurrent, and overvoltage, and outputs a voltage DC ± 24V and a maximum operating current of 10A.

In particular, for the power module V1, a dc input pin Vin1+ (i.e., pin 1) and a dc input pin Vin1- (i.e., pin 4), a positive voltage output pin Vout + (i.e., pin 9), and a negative voltage output pin Vout- (i.e., pin 5) are provided thereon, the 7 th pin is a correction (Trim) pin, the 8 th pin is a Sense + (positive voltage detection) pin, and the 6 th pin is a Sense- (negative voltage detection) pin;

the correction (Trim) pin and the Sense + (positive voltage detection) pin are matched with resistors (such as resistors R2 and R3) and used for correcting the output voltage of the direct-current voltage positive output end Vout2 +; the correction (Trim) pin is used to cooperate with the Sense (negative voltage detection) pin with resistors (e.g., resistors R4 and R5) for correcting the output voltage of the negative output terminal Vout 2-of the dc voltage. The 2 nd pin (PC pin) and the 3 rd pin (PR pin) of source module V1 are vacant, can regard as outside remote control effect, the utility model discloses in not using.

In the concrete implementation, the dc voltage positive output terminal Vout2+, the dc voltage negative output terminal Vout 2-is used for connecting with external electric equipment, such as electric equipment on a railway locomotive, and specifically may be a signal and monitoring system vehicle-mounted host on an STP-TH type wireless shunting locomotive. The vehicle-mounted host serves as the core of a vehicle-mounted system of the whole STP-TH type wireless shunting locomotive, and all operation information is gathered to the vehicle-mounted host for calculation and processing.

The utility model discloses in, on specifically realizing, power module V1 exports DC24V, and this output is through output filter capacitance C3 to the output display circuit who is formed by emitting diode LED2 and resistance R6 shows, and when power module V1 normal output voltage, emitting diode LED2 lights, and it is normal to show the output.

Based on the above technical scheme can know, the utility model discloses a direct current voltage conversion module is a stable, controllable direct current voltage conversion module of output.

The utility model discloses in, on specifically realizing, can adopt DC74V as input power, through adopting the modular circuit, possess functions such as input overvoltage protection, input overcurrent protection, output current-limiting protection (overcurrent protection promptly) and output short-circuit protection.

It should be noted that, for the dc voltage conversion module provided by the present invention, the input overvoltage protection function is realized by using the voltage dependent resistors RP1 to RP 3; the input overcurrent protection function is realized by utilizing a fuse F1; the output current-limiting protection (namely, overcurrent protection) function is realized by utilizing the current-limiting protection function of the power supply module V1; the output short-circuit protection function is realized by the output fuses F2 and F3.

Referring to fig. 1, the DC voltage conversion module of the present invention is based on the circuit design shown in fig. 1, after the external DC power supply of DC74V is secured, the input terminal of the power module V1 is inputted, and then after being rectified by the power module V1, the output voltage DC24V is outputted.

It should be noted that the dc voltage conversion module of the present invention has the characteristics of large power, high temperature resistance, etc., and has the advantages of light weight, good heat dissipation, etc.

Through the inspection, the utility model discloses a power module output voltage is DC24V, and maximum operating current 10A, and power is close 250W, and the volume of module casing can be controlled only to be 170mm x140 mm x80mm, and weight is about 2KG, the utility model discloses a module shell adopts cast aluminium shell, directly sets up the power shell fin on the module shell.

It should be noted that the utility model discloses a direct current voltage conversion module, the predominant use provides stable direct current 24V for locomotive powered device, and this direct current voltage conversion module has multiple protect function, can satisfy the requirement of different application scenarios, is not limited to the rail vehicle field, and other requirements input voltage are DC72 ~ 110V scope, and output voltage is that DC 24V's occasion all can use.

It should be noted that the utility model discloses a direct current voltage conversion module, module casing can adopt the box structure, reserve the installation hole site, simple to operate.

Referring to fig. 2 to 4, the dc voltage conversion module includes a module case 1;

a switch (S1) 2, a fuse F1 mounting seat 3, a fuse F2 mounting seat 4, a fuse F3 mounting seat 5 and a shell grounding point 6 are arranged on the left side of the module shell 1;

a direct-current voltage output terminal 7 and an external direct-current voltage input terminal 8 are arranged on the right side of the module shell 1;

on the front side of the module housing 1, a plurality of mutually parallel power supply housing cooling fins 9 are provided.

In the present invention, the switch (S1) 2 is a toggle type toggle switch for controlling the on/off of the input power source (i.e., a switch).

In the utility model, a fuse F1 mounting seat 3 is used for mounting the fuse F1;

and a fuse F2 mounting seat 4 and a fuse F3 mounting seat 5 for mounting the fuse F2 and the fuse F3, respectively.

In the present invention, the housing ground point 6 is used to ground the housing (i.e., the module case 1) (e.g., via a ground wire);

note that, the DC voltage output terminal 7 specifically includes output terminals Vout2+ and Vout2 "of DC24V, and is used for connecting with an input terminal of an external electric device;

the external DC voltage input terminal 8, which includes in particular the DC74V input terminals Vin1+ and Vin1-, is adapted to be connected to an input of an external DC voltage source.

It should be noted that the power module V1 is located inside the module casing 1 made of cast aluminum, and the heat dissipation is facilitated by the design of the heat sink 9 of the power housing;

in conclusion, compared with the prior art, the utility model provides a pair of direct current voltage conversion module, its structural design science possesses input overvoltage protection, input overcurrent protection, functions such as output current-limiting protection and output short-circuit protection, can be with external input's higher direct current voltage (for example 72 ~ 110V within range's direct current voltage), stably convert the output into lower direct current voltage (24V direct current voltage) back, thereby can reliably supply power for the direct current voltage consumer including the inside consumer of rail vehicle equipment, ensure the normal use of these consumers, great practical significance has.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A direct current voltage conversion module is characterized by comprising fuses F1-F3, a switch S1, diodes D1-D2, an inductor L1, piezoresistors RP 1-RP 3, capacitors C1-C3, light emitting diodes LED 1-LED 2 and a power module V1;

the 9 th pin of the power module V1 is respectively connected with one end of the capacitor C3 and one end of the fuse F2;

2. The dc voltage conversion module of claim 1, further comprising an input display circuit;

3. The dc voltage conversion module of claim 1, further comprising an output display circuit;

4. The dc voltage conversion module of claim 1, further comprising resistors R2-R5;

the other end of the resistor R2 is respectively connected with the 8 th pin of the power module V1 and one end of the resistor R3;

the other end of the resistor R3 is respectively connected with the 7 th pin of the power module V1 and one end of the resistor R4;

5. The direct-current voltage conversion module according to any one of claims 1 to 4, wherein an external direct-current voltage negative input terminal Vin 1-is connected with a power ground GND1;

6. The DC voltage conversion module according to any of claims 1 to 4, wherein pins 2 and 3 of the power supply module V1 are left vacant.

7. The direct-current voltage conversion module according to any one of claims 1 to 4, wherein the fuses F1, F2 and F3 are all 5A/250V fuses.

8. The direct voltage conversion module according to any one of claims 1 to 4, characterized in that the direct voltage conversion module comprises a module housing;

the left side of the module shell is provided with a switch S1, a fuse F1 mounting seat, a fuse F2 mounting seat, a fuse F3 mounting seat and a shell grounding point;