CN214792962U

CN214792962U - On-site detection circuit

Info

Publication number: CN214792962U
Application number: CN202120552908.9U
Authority: CN
Inventors: 刘元展; 王林
Original assignee: Shenzhen Infypower Co ltd
Current assignee: Shenzhen Infypower Co ltd
Priority date: 2021-03-17
Filing date: 2021-03-17
Publication date: 2021-11-19
Anticipated expiration: 2031-03-17

Abstract

The embodiment of the utility model provides a detection circuitry on position sets up in an opto-coupler former limit with an emergency stop unit, detection circuitry on position includes former limit power supply, first current-limiting resistor and first diode, former limit power supply anodal with first current-limiting resistor one end electricity is connected, the first current-limiting resistor other end with first diode one end electricity is connected, the first diode other end with the former limit electricity of opto-coupler is connected, former limit power supply negative pole with the former limit electricity of opto-coupler is connected, the opto-coupler secondary is connected with a digital signal processor electricity able to programme. The module has a simple structure, can realize the position detection function of the module only by a plurality of simple devices and the optical coupler for transmitting the emergency stop signal, realizes the function and saves the cost.

Description

On-site detection circuit

Technical Field

The utility model belongs to the technical field of power electronic product and specifically relates to indicate an on-the-spot detection circuitry.

Background

In the field of industrial application, there are a large number of application scenarios for charging electric vehicles, energy storage batteries, and the like. Typically, multiple modules are installed in parallel into the same bay or cabinet to achieve the required high current requirements.

In the current state of the art, the current that can be output by a single module is also greatly increased. Therefore, when a single module or multiple modules are inserted into the insertion frame or the cabinet, once the input/output terminals of the modules are in poor contact with the sockets on the insertion frame or the cabinet, the contact impedance of the terminals is increased, the sockets generate heat and accumulate heat due to long-time high-current operation, and even more serious conditions such as fire disasters are likely to occur.

Therefore, it is necessary to design a position detection circuit to determine whether the module is inserted into the set depth, determine whether the module is allowed to be powered on, and avoid the problems of heating and firing of the module or the cabinet socket. At the same time, the charging modules are sensitive to price, so that it is more desirable to complete the design at the lowest possible cost.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a technical problem who solves is: because unable judgement module depth of insertion among the prior art, under the bad condition of socket contact easily, because heat accumulation leads to the emergence of trouble such as the fire that generates heat, and current module cost of charging is high.

In order to solve the technical problem, the embodiment of the utility model provides an adopt technical scheme is:

the embodiment of the utility model provides a detection circuitry on position sets up in an opto-coupler former limit with an emergency stop unit, detection circuitry on position includes former limit power supply, first current-limiting resistor and first diode, former limit power supply anodal with first current-limiting resistor one end electricity is connected, the first current-limiting resistor other end with first diode one end electricity is connected, the first diode other end with the opto-coupler former limit electricity is connected, former limit power supply negative pole with the former limit electricity of opto-coupler is connected, the opto-coupler secondary is connected with a digital signal processor electricity able to programme.

The power supply module further comprises a position _ pin and a 12V _ pin, wherein the position _ pin is electrically connected with the other end of the first current-limiting resistor and one end of the first diode respectively, the 12V _ pin is electrically connected with the negative electrode of the primary power supply, and the position _ pin and the 12V _ pin can be electrically connected with an output terminal of the module.

Furthermore, the emergency stop unit comprises an emergency stop module, a common mode inductor, a second diode, a second resistor and a capacitor, an ESTOP end of the emergency stop module is electrically connected with an input end on one side of the common mode inductor, an output end on one side of the common mode inductor is electrically connected with one end of the second diode, the other end of the second diode is electrically connected with one end of the second resistor, the other end of the second resistor is respectively electrically connected with one end of the capacitor and a primary side of the optical coupler, the other end of the capacitor is electrically connected with an input end on the other side of the common mode inductor, and an output end on the other side of the common mode inductor is electrically connected with a 12V-pin end of the emergency stop module.

Furthermore, the emergency stop unit further comprises a third resistor, one end of the third resistor is electrically connected with the other end of the second resistor, and one end of the third resistor is electrically connected with the other end of the capacitor and the input end on the other side of the common mode inductor respectively.

Furthermore, the position _ pin and the other end of the current-limiting resistor are coupled to the other side of the common-mode inductor.

The embodiment of the utility model provides a beneficial effect lies in: the embodiment of the utility model provides a detection circuitry on position sets up in an opto-coupler former limit with an emergency stop unit, detection circuitry on position includes former limit power supply, first current-limiting resistor and first diode, former limit power supply anodal with first current-limiting resistor one end electricity is connected, the first current-limiting resistor other end with first diode one end electricity is connected, the first diode other end with the opto-coupler former limit electricity is connected, former limit power supply negative pole with the former limit electricity of opto-coupler is connected, the opto-coupler secondary is connected with a digital signal processor electricity able to programme. And the same optical coupler is shared with the emergency stop unit to transmit a fault signal. Except the opto-coupler, only use several simple components and parts to constitute detection circuitry and just can realize whether detection module inserts the function on the position on the frame of inserting for its design, in case detect module socket contact pin and insert that frame socket contact pin contact is bad just forbid the module and start to protection module input/output terminal avoids the heat accumulation, the emergence of fault conditions such as generating heat and firing, simple structure can realize the function of protection, can save the cost again, the price/performance ratio is high.

Drawings

The following detailed description of the embodiments of the present invention with reference to the drawings

Fig. 1 is a schematic circuit diagram of an embodiment of the present invention;

fig. 2 is another schematic circuit diagram of an embodiment of the present invention;

fig. 3 is a schematic diagram illustrating the operation of the module according to the embodiment of the present invention inserted into a specific position;

fig. 4 is a schematic diagram illustrating the operation of the module according to the embodiment of the present invention not inserted into a specific position;

Detailed Description

In order to explain technical contents, structural features, and objects and effects of the present invention in detail, the following description is given in conjunction with the embodiments and the accompanying drawings.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

Please refer to fig. 1, the utility model provides a detection circuitry on throne, set up in an opto-coupler U101 former limit with an emergency stop unit, detection circuitry on throne includes former limit power supply, first current-limiting resistor R1 and first diode D1, former limit power supply positive pole is connected with first current-limiting resistor R1 one end electricity, the first current-limiting resistor R1 other end is connected with first diode D1 one end electricity, the first diode D1 other end is connected with opto-coupler U101's former limit electricity, former limit power supply negative pole is connected with opto-coupler U101 former limit electricity, opto-coupler U101 secondary is connected with a digital signal processor electricity able to programme.

In this embodiment, same opto-coupler U101 transmission fault signal is shared with the scram unit to detection circuitry in place, except opto-coupler U101, only use several simple components and parts to constitute detection circuitry and just can realize whether detection module inserts the function for its position on the good frame of inserting of design, in case detect module socket contact pin and insert the poor module start of just forbidding of frame socket contact pin contact, thereby protection module input/output terminal, avoid the heat accumulation, the emergence of fault conditions such as the heating is fired on, simple structure can realize the function of protection, can save the cost again, the price/performance ratio is high.

It should be noted that the first current limiting resistor R1 may be implemented by a single chip device, or may be implemented by a plurality of serial-parallel connection (see fig. 2). The selection is carried out according to the requirement. The first diode D1 realizes a unidirectional conduction, prevents current from flowing backward, and prevents the external espop signal from short-circuiting and failing the espop signal. And the first diode D1D1 is required to ensure enough reverse voltage withstanding value to prevent the failure of the detection circuit caused by reverse breakdown, and the primary side power supply provides a fault signal.

Furthermore, the power supply module also comprises a position _ pin and a 12V _ pin, wherein the position _ pin is respectively and electrically connected with the other end of the first current-limiting resistor R1 and one end of the first diode D1, the 12V _ pin is electrically connected with the cathode of the primary power supply, and the position _ pin and the 12V _ pin can be electrically connected with an output terminal of the module.

In this embodiment, the position _ pin and the 12V _ pin are two pins reserved in the module output terminal, and the two pins respectively correspond to a system or a hole in a socket on the plug frame and are connected to form a short circuit, so as to ensure the effectiveness of the detection circuit.

Furthermore, the emergency stop unit comprises an emergency stop module, a common-mode inductor L1, a second diode D2, a second resistor R2 and a capacitor C1, an ESTOP end of the emergency stop module is electrically connected with an input end of one side of the common-mode inductor L1, an output end of one side of the common-mode inductor L1 is electrically connected with one end of a second diode D2, the other end of the second diode D2 is electrically connected with one end of the second resistor R2, the other end of the second resistor R2 is electrically connected with one end of the capacitor C1 and a primary side of an optocoupler U101, the other end of the capacitor C1 is electrically connected with an input end of the other side of the common-mode inductor L1, and an output end of the other side of the common-mode inductor L1 is electrically connected with a 12V-pin end of the emergency stop module.

Furthermore, the emergency stop unit further includes a third resistor R3, one end of the third resistor R3 is electrically connected to the other end of the second resistor R2, and one end of the third resistor R3 is electrically connected to the other end of the capacitor C1 and the input end of the other side of the common mode inductor L1.

Furthermore, the position _ pin and the other end of the first current limiting resistor R1 are coupled to the other side of the common mode inductor L1.

The specific working principle is as follows:

referring to fig. 3, when the module is plugged to a specific position, the position _ pin in the output socket at the module end is short-circuited with the 12V _ pin at the negative terminal of the +5V power supply at the primary side, so that the current flow at the primary side of the optocoupler U101 is the positive terminal of the +5V power supply at the primary side → the first current limiting resistor R1 → the common mode inductor L1 → the negative terminal of the power supply at the primary side. The primary side of the optocoupler U101 has no current and is not conducted, so that a triode on the secondary side has no switching-on signal, and the collector is a high-level signal. The programmable digital signal processor detects that the signal at point 1 is high, allowing the module to boot.

Referring to fig. 4, when the module is not inserted to the designated position, the position _ pin at the on-position detection in the output socket at the module end and the negative terminal 12V-pin of the primary side +5V power supply are opened, so the current flow direction of the primary side of the optocoupler U101 is the primary side +5V power supply positive pole → the first current limiting resistor R1 → the primary side of the optocoupler U101 → the primary side power supply negative pole (and also the negative pole of the external espop signal). Therefore, the primary side of the optocoupler U101 is conducted, the triode on the secondary side obtains a switching-on signal and is conducted, and the collector of the triode on the secondary side is grounded and is at a low level. And when the programmable digital signal processor detects that the signal of the 1 point is low level, the module is forbidden to start.

The value of the first current limiting resistor R1 must be selected to ensure that the primary side of the optocoupler U101 receives sufficient current to be fully turned on. Therefore, the secondary side of the optocoupler U101 can generate low level and transmit a correct shutdown signal to a programmable Digital Signal Processor (DSP). Meanwhile, the resistance value of the first current limiting resistor R1 cannot be too small, and the loss of the optocoupler U101 and the first current limiting resistor R1 is too large due to too large primary current, so that the reliability of the optocoupler U101 and the first current limiting resistor R1 is influenced, and the specific numerical value can be realized through debugging.

When the position detection function is realized, the circuit does not influence the transmission of the normal emergency stop signal of the module. When the module is inserted in place, the emergency stop signal enables the primary side of the optocoupler U101 to be conducted, and the signal is normally transmitted to the secondary side of the optocoupler U101. When the module is not inserted in place, the module is not allowed to be started, so that the problem of emergency stop signal transmission does not exist.

To sum up, the utility model provides a detection circuitry on throne, can with scram unit sharing key device, whether detection module inserts and inserts frame or rack assigned position, insert the difference that targets in place or does not arrive the position and produce according to relevant circuit detection module and obtain different signals, send into programmable logic controller and judge, and decide whether allow the module start, can protect the module through this kind of mode, avoid input/output terminal contact failure, the impedance increase and cause long-term heat accumulation and the scheduling problem of firing, simple structure can realize the function of protection, can save the cost again, the price/performance ratio is high.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An in-situ detection circuit, characterized by: the on-site detection circuit comprises a primary side power supply, a first current-limiting resistor and a first diode, wherein the anode of the primary side power supply is electrically connected with one end of the first current-limiting resistor, the other end of the first current-limiting resistor is electrically connected with one end of the first diode, the other end of the first diode is electrically connected with the primary side of the optocoupler, the cathode of the primary side power supply is electrically connected with the primary side of the optocoupler, and the secondary side of the optocoupler is electrically connected with a programmable digital signal processor.

2. The in-situ detection circuit of claim 1, wherein: the power supply circuit also comprises a position _ pin and a 12V-pin, wherein the position _ pin is respectively and electrically connected with the other end of the first current-limiting resistor and one end of the first diode, the 12V-pin is electrically connected with the negative electrode of the primary power supply, and the position _ pin and the 12V-pin can be electrically connected with an output terminal of a module.

3. The in-situ detection circuit of claim 2, wherein: the emergency stop unit comprises an emergency stop module, a common mode inductor, a second diode, a second resistor and a capacitor, wherein an ESTOP end of the emergency stop module is electrically connected with an input end on one side of the common mode inductor, an output end on one side of the common mode inductor is electrically connected with one end of the second diode, the other end of the second diode is electrically connected with one end of the second resistor, the other end of the second resistor is respectively electrically connected with one end of the capacitor and a primary side of an optical coupler, the other end of the capacitor is electrically connected with an input end on the other side of the common mode inductor, and an output end on the other side of the common mode inductor is electrically connected with a 12V-pin end of the emergency stop module.

4. The in-situ detection circuit of claim 3, wherein: the emergency stop unit further comprises a third resistor, one end of the third resistor is electrically connected with the other end of the second resistor, and one end of the third resistor is electrically connected with the other end of the capacitor and the input end on the other side of the common mode inductor respectively.

5. The in-situ detection circuit of claim 4, wherein: the position _ pin and the other end of the current-limiting resistor are coupled to the other side of the common-mode inductor.