CN217214586U

CN217214586U - Electronic relay with protection function

Info

Publication number: CN217214586U
Application number: CN202220634817.4U
Authority: CN
Inventors: 喻端; 曾繁亮; 马运凡; 史国辉
Original assignee: Wuhan Tianyun Auto Electric System Co ltd
Current assignee: Wuhan Tianyun Auto Electric System Co ltd
Priority date: 2022-03-21
Filing date: 2022-03-21
Publication date: 2022-08-16
Anticipated expiration: 2032-03-21

Abstract

The utility model discloses a take protect function's electronic relay, this take protect function's electronic relay include constant voltage power supply module, opto-coupler isolation module and drive module, constant voltage power supply module, opto-coupler isolation module and drive module connect gradually, whole car is connected respectively to constant voltage power supply module and drive module, drive module's output connection load. Compared with an electromagnetic relay, the utility model has the advantages of high reliability, no contact, long service life, high speed and small interference to the outside; the input end can directly drive a heavy current load by using a tiny control signal; the element for the coupling circuit is an optical coupler, and has the advantages of sensitive action, high response speed and high insulation grade between input/output ends; the internal part has no mechanical part, and the switch has the advantages of vibration resistance, corrosion resistance, long service life, high reliability and the like, and the service life of the switch is long; the output end is provided with a protection circuit, which can realize protection functions such as reverse connection, short circuit, open circuit, overvoltage and the like, and has better application prospect.

Description

Electronic relay with protection function

Technical Field

The utility model relates to an electronic relay technical field especially relates to a take protect function's electronic relay.

Background

A relay (english name: relay) is an electric control device, and is an electric appliance that generates a predetermined step change in a controlled amount in an electric output circuit when a change in an input amount (excitation amount) meets a predetermined requirement. It has an interactive relationship between a control system (also called an input loop) and a controlled system (also called an output loop). It is commonly used in automated control circuits, which are actually a "recloser" that uses low current to control high current operation. Therefore, the circuit plays the roles of automatic regulation, safety protection, circuit conversion and the like.

The existing electromagnetic relay has the defects of complex structure, high cost, slow response, short service life and the like, so that the electronic relay is urgently needed at present and has the advantages of no contact, long service life and high speed.

SUMMERY OF THE UTILITY MODEL

In order to overcome the deficiency of the related products in the prior art, the utility model provides a take protect function's electronic relay.

The utility model provides a take protect function's electronic relay, include: the system comprises a voltage-stabilized power supply module, an optical coupling isolation module and a driving module, wherein the voltage-stabilized power supply module, the optical coupling isolation module and the driving module are sequentially connected, the voltage-stabilized power supply module and the driving module are respectively connected with a whole vehicle, the output end of the driving module is connected with a load, the whole vehicle supplies power to the driving module and the voltage-stabilized power supply module and simultaneously outputs an enabling signal to the voltage-stabilized power supply module, after the voltage-stabilized power supply module receives the enabling signal of the whole vehicle, the driving signal is output and then processed with a feedback signal of the driving module, and a high-level driving signal is output to drive the optical coupling isolation module; and the optical coupling isolation module secondary outputs an enabling signal to control the driving module to correspondingly control the load.

In some embodiments of the present invention, the regulated power supply module includes diodes D1, ZD1, ZD2, resistors R1, R2, and capacitor C1, and is connected to the entire vehicle through input connection terminal pin 1 and input connection terminal pin 2; the resistor R2, the capacitor C1 and the diode ZD1 are connected in parallel, one side connecting ends of anodes of the resistor R2, the capacitor C1 and the diode ZD1 are respectively connected with an input connecting end pin 1 and the ground, and one side connecting ends of cathodes of the resistor R2, the capacitor C1 and the diode ZD1 are respectively connected with one end of the resistor R1 and the cathode of the diode ZD 2; the anode of the diode D1 is connected with the input connection terminal pin 2, and the cathode of the diode D1 is connected with the other end of the resistor R1; the anode of the diode ZD2 is connected with an optical coupling isolation module.

In some embodiments of the present invention, the optocoupler isolation module includes an optocoupler U1, a resistor R3, capacitors C2, C3, and a diode ZD 3; the resistor R3, the capacitor C2 and the diode ZD3 are connected in parallel, the positive connection ends of the resistor R3, the capacitor C2 and the diode ZD3 are respectively connected with the pin 3 of the optocoupler U1 and the ground, and the negative connection ends of the resistor R3, the capacitor C2 and the diode ZD3 are respectively connected with the pin 1 of the optocoupler U1 and the regulated power supply module; pin 4 of the optocoupler U1 is connected with one end of a capacitor C3 and the ground respectively; and the pin 6 of the optocoupler U1 is respectively connected with the other end of the capacitor C3 and the driving module.

In some embodiments of the present invention, the driving module includes resistors R4, R5, R6, R7, R8, R9, R10, diodes D2, D3, ZD4, ZD5, ZD6, MOS transistor Q1 and transistor Q2; the resistors R5 and R7 and the diode ZD5 are connected in parallel, wherein the connection ends of the cathodes of the resistor R5, the resistor R7 and the diode ZD5 are respectively connected with the drain of the MOS transistor Q1, one ends of the resistors R8 and R9 and the cathode of the diode D2; two ends of the resistor R6 are respectively connected to the other ends of the resistors R5 and R7, the connection end of the resistor R6 and the resistor R5 is connected to a pin 6 of an optocoupler U1, the connection end of the resistor R6 and the resistor R7 is also respectively connected to the anode of a diode ZD5 and the gate of a MOS transistor Q1, the source of the MOS transistor Q1 is respectively connected to the emitter of a triode Q2, the cathode of the diode ZD4 and an output connection end pin 5, and the output connection end pin 5 is connected to a load; one end of the resistor R4 is connected with the anode of the diode ZD4, and the other end of the resistor R4 is respectively connected with a voltage-stabilizing power supply module and an optical coupling isolation module; the base electrode of the triode Q2 is respectively connected with the other end of the resistor R8 and the resistor R10, and the other end of the resistor R10 is grounded; the collector of the triode Q2 is respectively connected with the other end of the resistor R9 and the cathode of the diode D3, and the anode of the diode D3 is respectively connected with the voltage-stabilized power supply module and the optocoupler isolation module; the anode of the diode D2 and the cathode of the diode ZD6 are connected to the output pin 3, respectively, and the anode of the diode ZD6 is grounded.

In some embodiments of the present invention, the load includes a resistor RL connected in series with the anode of the diode D4, and a diode D4, the resistor RL is connected to the output connection terminal pin 5 of the driving module, and the cathode of the diode D4 is grounded.

Compared with the prior art, the utility model discloses there is following advantage:

the electronic relay with the protection function provided by the embodiment of the utility model can achieve the functions of non-contact and non-spark connection and disconnection, has high reliability, long service life and high speed compared with an electromagnetic relay, and has small interference to the outside; the input end can directly drive a heavy current load by using a tiny control signal; the element for the coupling circuit is an optical coupler, and has the advantages of sensitive action, high response speed and high insulation grade between input/output ends; the internal part is not provided with mechanical parts, and the switch has the advantages of vibration resistance, corrosion resistance, long service life, high reliability and the like, and has long switch service life; the output end is provided with a protection circuit, which can realize protection functions of reverse connection, short circuit, open circuit, overvoltage and the like, and has better application prospect.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an electronic relay with a protection function according to the present invention;

fig. 2 is a schematic diagram of a reference circuit of the electronic relay with protection function according to the present invention;

fig. 3 is the function detection schematic diagram of the electronic relay with protection function of the present invention.

Description of reference numerals:

100. a regulated power supply module; 200. an opto-coupler isolation module; 300. and a driving module.

Detailed Description

In order to make the technical field person understand the scheme of the present invention better, the following will combine the drawings in the embodiments of the present invention to clearly and completely describe the technical scheme in the embodiments of the present invention. It is to be understood that the embodiments described are merely exemplary of the invention, and that no limitations are intended to the details of construction or design herein shown. The present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for the purpose of providing a more thorough understanding of the present disclosure.

Referring to fig. 1, the electronic relay with the protection function includes a regulated power supply module 100, an optical coupling isolation module 200 and a driving module 300, wherein the regulated power supply module 100, the optical coupling isolation module 200 and the driving module 300 are sequentially connected, the regulated power supply module 100 and the driving module 300 are respectively connected to a whole vehicle (a built-in vehicle body control module), the whole vehicle is used for supplying power to the regulated power supply module 100 and the driving module 300, and an output end of the driving module 300 is connected to a load; the finished automobile supplies power to the driving module 300 and the stabilized voltage power supply module 100, an enabling signal is output to the stabilized voltage power supply module 100 at the same time, after the stabilized voltage power supply module 100 receives the enabling signal of the finished automobile, a driving signal (high level is effective), and processing is carried out on the driving signal and a feedback signal (when a load is not short-circuited, the feedback signal is high level, and when the load is short-circuited, the feedback signal is low level) of the driving module 300, and a +5V high level driving signal is output to drive the optocoupler isolation module 200; the secondary side of the optical coupling isolation module 200 outputs an enabling signal to control the driving module 300, so that the load is correspondingly controlled; the voltage-stabilized power supply module 100 converts a 24V power supply into a stable 5V power supply to supply power to the optical coupling isolation module 200; the optical coupling isolation module 200 enables the isolated two parts of circuits to be electrically and directly connected, and mainly prevents the whole vehicle circuit from being influenced by the problems of short circuit of an electronic relay and the like, thereby playing a role in safety protection and isolation.

Referring to fig. 2, the regulated power supply module 100 includes diodes D1, ZD1, ZD2, resistors R1, R2, and a capacitor C1, and the regulated power supply module 100 is connected to the entire vehicle through an input connection terminal pin 1 and an input connection terminal pin 2; the resistor R2, the capacitor C1 and the diode ZD1 are connected in parallel, one side connecting ends of anodes of the resistor R2, the capacitor C1 and the diode ZD1 are respectively connected with an input connecting end pin 1 and the ground, and one side connecting ends of cathodes of the resistor R2, the capacitor C1 and the diode ZD1 are respectively connected with one end of the resistor R1 and the cathode of the diode ZD 2; the anode of the diode D1 is connected with the input connection terminal pin 2, and the cathode of the diode D1 is connected with the other end of the resistor R1; the anode of the diode ZD2 is connected to the optocoupler isolation module 200.

The optical coupler isolation module 200 comprises an optical coupler U1, a resistor R3, capacitors C2 and C3 and a diode ZD 3; the resistor R3, the capacitor C2 and the diode ZD3 are connected in parallel, the positive connection ends of the resistor R3, the capacitor C2 and the diode ZD3 are respectively connected with the pin 3 of the optocoupler U1 and the ground, and the negative connection ends of the resistor R3, the capacitor C2 and the diode ZD3 are respectively connected with the pin 1 of the optocoupler U1 and the regulated power supply module 100; pin 4 of the optocoupler U1 is connected with one end of a capacitor C3 and the ground respectively; the pin 6 of the optocoupler U1 is connected to the other end of the capacitor C3 and the driving module 300 respectively.

The driving module 300 comprises resistors R4, R5, R6, R7, R8, R9 and R10, diodes D2, D3, ZD4, ZD5 and ZD6, a MOS transistor Q1 and a triode Q2; the resistors R5 and R7 and the diode ZD5 are connected in parallel, wherein the connection ends of the cathodes of the resistor R5, the resistor R7 and the diode ZD5 are respectively connected with the drain of the MOS transistor Q1, one ends of the resistors R8 and R9 and the cathode of the diode D2; two ends of the resistor R6 are respectively connected to the other ends of the resistors R5 and R7, the connection end of the resistor R6 and the resistor R5 is connected to a pin 6 of the optocoupler U1, the connection end of the resistor R6 and the resistor R7 is also respectively connected to the anode of a diode ZD5 and the gate of a MOS transistor Q1, the source of the MOS transistor Q1 is respectively connected to the emitter of a triode Q2, the cathode of the diode ZD4 and an output connection terminal pin 5, and the output connection terminal pin 5 is connected to a load; one end of the resistor R4 is connected with the anode of the diode ZD4, and the other end of the resistor R4 is respectively connected with a voltage-stabilized power supply module 100 and an optical coupling isolation module 200; the base electrode of the triode Q2 is respectively connected with the other end of the resistor R8 and the resistor R10, and the other end of the resistor R10 is grounded; the collector of the triode Q2 is respectively connected with the other end of the resistor R9 and the cathode of the diode D3, and the anode of the diode D3 is respectively connected with the voltage-stabilized power supply module 100 and the optocoupler isolation module 200; the anode of the diode D2 and the cathode of the diode ZD6 are connected to the output pin 3, respectively, and the anode of the diode ZD6 is grounded.

The load comprises a resistor RL and a diode D4, the resistor RL is connected with the anode of the diode D4 in series, the resistor RL is connected with the output connection terminal pin 5 of the driving module 300, and the cathode of the diode D4 is grounded.

In an embodiment of the present invention, the product model number of the optical coupler U1 is TLP 185. ZD1, ZD2, ZD3, ZD4, ZD5 and ZD6 are TVS tubes.

As shown in fig. 3, for the function detection diagram of the electronic relay with protection function of the embodiment of the present invention, the electronic relay with protection function is connected to the circuit according to the principle of fig. 3, when the voltmeter V is 0, the starting time of slowly adjusting the varistor to rise to the time of extinguishing the lamp bead is recorded as the trigger voltage V2 (V2 is not less than 14V and not more than 18V), and then the voltage is continuously adjusted to the test voltage 20V; at the moment, the electronic relay is turned off, namely, the voltage at two ends of the electronic relay is the turn-off voltage when the voltage is 6V-10V; then slowly adjusting the rheostat to be a trigger voltage V1 (V1 is more than or equal to 4V and less than or equal to 8V) when the lamp beads are lightened; at the moment, the electronic relay is switched on, namely the voltage at two ends of the electronic relay is the switching-on voltage when the voltage is 16V-20V; voltage drop V3 between output connection end pin 3 and output connection end pin 5 both ends is 0 ~ 0.7V, can verify the embodiment the electronic relay of taking protect function has low-power consumption, the little advantage generates heat.

The electronic relay with the protection function of the embodiment of the utility model utilizes the organic combination of the existing elements which are easy to obtain to realize the functions of overvoltage, reverse voltage, short-circuit protection and the like, realizes the function of comparatively stable control and regulation of current, realizes the control of comparatively large current through comparatively small current, and achieves the effect of automatic switching; the principle of realizing overvoltage protection is that when a large voltage V (V is more than or equal to 36V) is input into an input connecting end pin 1, a TVS tube ZD1 is broken down to conduct current to the ground, and other devices cannot be influenced; the reverse voltage protection principle is the same, when the input connection terminal pin 2 inputs voltage, the voltage also directly flows to the ground, other devices cannot be influenced, when the output connection terminal pin 5 inputs voltage, no voltage difference exists between the two ends of the triodes Q1 and Q2, the two ends of the triodes Q1 and Q2 are not conducted, and the TVS tube ZD4 reduces the voltage protection circuit; the principle of realizing short-circuit protection is that an emitting electrode of a triode Q2 is grounded and then conducted, the voltage of a collector is reduced to be close to 0V, a diode D3 is conducted, the positive electrode of the triode is clamped at the voltage of the input end of a 0.7V optical coupler and is lower than a threshold value to be cut off, the output end of the triode becomes high level, and the voltage of an MOS grid electrode becomes high to be cut off, so that the circuit is prevented from being damaged by short circuit.

The embodiment of the utility model provides a take protect function's electronic relay compares in prior art, has following advantage:

1. the electronic relay can achieve the functions of non-contact and non-spark connection and disconnection only by using electronic components, has high reliability, no contact, long service life and high speed compared with an electromagnetic relay, and has small interference to the outside;

2. the input end can directly drive a heavy current load by using a tiny control signal;

3. the element for the coupling circuit is an optical coupler, and has the advantages of sensitive action, high response speed and high insulation (voltage resistance) grade between input/output ends;

4. the product has small volume and is convenient to install and replace;

5. the method has the characteristics of small control power, good electromagnetic compatibility, low noise, high working frequency and the like;

6. the internal part has no mechanical part, and the switch has the advantages of vibration resistance, corrosion resistance, long service life, high reliability and the like, and the service life of the switch is long;

7. the output end is provided with a protection circuit, which can realize protection functions of reverse connection, short circuit, open circuit, overvoltage and the like, and has better application prospect.

Those not described in detail in this specification are well within the skill of the art. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing detailed description, or equivalent replacements may be made for some of the technical features of the embodiments. All utilize the equivalent structure that the content of the utility model discloses a specification and attached drawing was done, direct or indirect application is in other relevant technical field, all is in the same way the utility model discloses within the patent protection scope.

Claims

1. An electronic relay with a protection function, comprising: the system comprises a voltage-stabilized power supply module, an optical coupling isolation module and a driving module, wherein the voltage-stabilized power supply module, the optical coupling isolation module and the driving module are sequentially connected, the voltage-stabilized power supply module and the driving module are respectively connected with a whole vehicle, the output end of the driving module is connected with a load, the whole vehicle supplies power to the driving module and the voltage-stabilized power supply module and simultaneously outputs an enabling signal to the voltage-stabilized power supply module, after the voltage-stabilized power supply module receives the enabling signal of the whole vehicle, the driving signal is output and then processed with a feedback signal of the driving module, and a high-level driving signal is output to drive the optical coupling isolation module; the optical coupling isolation module secondary outputs an enable signal to control the driving module to correspondingly control the load.

2. The electronic relay with protection function according to claim 1, characterized in that: the voltage-stabilized power supply module comprises diodes D1, ZD1, ZD2, resistors R1, R2 and a capacitor C1, and is connected with the whole vehicle through an input connecting end pin 1 and an input connecting end pin 2; the resistor R2, the capacitor C1 and the diode ZD1 are connected in parallel, one side connecting ends of anodes of the resistor R2, the capacitor C1 and the diode ZD1 are respectively connected with an input connecting end pin 1 and the ground, and one side connecting ends of cathodes of the resistor R2, the capacitor C1 and the diode ZD1 are respectively connected with one end of the resistor R1 and the cathode of the diode ZD 2; the anode of the diode D1 is connected with the input connection terminal pin 2, and the cathode of the diode D1 is connected with the other end of the resistor R1; the anode of the diode ZD2 is connected with an optical coupling isolation module.

3. The electronic relay with protection function according to claim 1, characterized in that: the optical coupler isolation module comprises an optical coupler U1, a resistor R3, capacitors C2 and C3 and a diode ZD 3; the resistor R3, the capacitor C2 and the diode ZD3 are connected in parallel, the positive connection ends of the resistor R3, the capacitor C2 and the diode ZD3 are respectively connected with the pin 3 of the optocoupler U1 and the ground, and the negative connection ends of the resistor R3, the capacitor C2 and the diode ZD3 are respectively connected with the pin 1 of the optocoupler U1 and the regulated power supply module; pin 4 of the optocoupler U1 is connected with one end of a capacitor C3 and the ground respectively; and the pin 6 of the optocoupler U1 is respectively connected with the other end of the capacitor C3 and the driving module.

4. The electronic relay with protection function according to claim 3, characterized in that: the driving module comprises resistors R4, R5, R6, R7, R8, R9 and R10, diodes D2, D3, ZD4, ZD5 and ZD6, a MOS transistor Q1 and a triode Q2; the resistors R5 and R7 and the diode ZD5 are connected in parallel, wherein the connection ends of the cathodes of the resistor R5, the resistor R7 and the diode ZD5 are respectively connected with the drain of the MOS transistor Q1, one ends of the resistors R8 and R9 and the cathode of the diode D2; two ends of the resistor R6 are respectively connected to the other ends of the resistors R5 and R7, the connection end of the resistor R6 and the resistor R5 is connected to a pin 6 of an optocoupler U1, the connection end of the resistor R6 and the resistor R7 is also respectively connected to the anode of a diode ZD5 and the gate of a MOS transistor Q1, the source of the MOS transistor Q1 is respectively connected to the emitter of a triode Q2, the cathode of the diode ZD4 and an output connection end pin 5, and the output connection end pin 5 is connected to a load; one end of the resistor R4 is connected with the anode of the diode ZD4, and the other end of the resistor R4 is respectively connected with a voltage-stabilizing power supply module and an optical coupling isolation module; the base electrode of the triode Q2 is respectively connected with the other end of the resistor R8 and the resistor R10, and the other end of the resistor R10 is grounded; the collector of the triode Q2 is respectively connected with the other end of the resistor R9 and the cathode of the diode D3, and the anode of the diode D3 is respectively connected with the voltage-stabilized power supply module and the optocoupler isolation module; the anode of the diode D2 and the cathode of the diode ZD6 are connected to the output pin 3, respectively, and the anode of the diode ZD6 is grounded.

5. The electronic relay with protection function according to claim 4, characterized in that: the load comprises a resistor RL and a diode D4, the resistor RL is connected with the anode of the diode D4 in series, the resistor RL is connected with the output connection end pin 5 of the driving module, and the cathode of the diode D4 is grounded.