CN220914073U - Power equipment switch driving circuit - Google Patents
Power equipment switch driving circuit Download PDFInfo
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- CN220914073U CN220914073U CN202322611494.4U CN202322611494U CN220914073U CN 220914073 U CN220914073 U CN 220914073U CN 202322611494 U CN202322611494 U CN 202322611494U CN 220914073 U CN220914073 U CN 220914073U
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- fan
- driving circuit
- level signal
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- 230000003287 optical effect Effects 0.000 claims abstract description 19
- 239000003990 capacitor Substances 0.000 claims abstract description 10
- 238000002955 isolation Methods 0.000 claims abstract description 9
- 230000002411 adverse Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 238000012544 monitoring process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
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Abstract
The utility model provides a power equipment switch driving circuit, which comprises: and the fan control unit and the high-low voltage switch driving unit. In the power equipment switch driving circuit, the fan control unit can effectively prevent the misoperation of the relay due to the adoption of TLP521 type optocoupler isolation, the fan starting mode is divided into a manual mode and an automatic mode, and the fan can only be in one mode at the same time, so that the fan can work effectively. Furthermore, in the high-low voltage switch driving unit, the connection mode of the two optical couplers can effectively prevent CPUI/O port output errors caused by interference. In addition, the diode and the capacitor are connected in parallel at the two ends of the relay coil, so that adverse effects on the circuit caused by reverse electromotive force generated at the moment of power failure of the relay are effectively prevented.
Description
Technical Field
The utility model relates to a driving circuit, in particular to a power equipment switch driving circuit applied to a solar transformer substation.
Background
The automatic product of the power system is often used in the same environment with equipment with high voltage level, electromagnetic interference is strong, the operation environment of the power equipment is bad, and serious accidents can be caused by misoperation of hardware equipment. Therefore, on the basis of satisfying the system functions, the reliability and the stability of the system are improved as much as possible on the basis of the hardware design of the power system, and the anti-interference capability of the power system equipment is improved.
The hardware module of the solar transformer station main equipment running state monitoring terminal consists of a main electric quantity data monitoring module, a transformer temperature acquisition module, a power equipment switch driving module, an environment data acquisition module, a Zigbee wireless module, a 3G routing module, an RS-485 interface and the like. In the intelligent monitoring system of the transformer substation core equipment, when the equipment main electric quantity data is abnormal, all components of the electric power equipment need to be driven. Therefore, it is necessary to propose further solutions for how to achieve control of the components of the power plant.
Disclosure of utility model
The utility model aims to provide a power equipment switch driving circuit which overcomes the defects in the prior art.
To achieve the above object, the present utility model provides a power equipment switch driving circuit comprising: a fan control unit and a high-low voltage switch driving unit;
The fan control unit includes: receiving port JOUT1, isolation optocoupler U13, first relay K2 and fan interface P7; the receiving port JOUT1 receives an external level signal, the isolation optocoupler U13 is connected between the receiving port JOUT1 and the first relay K2, the fan interface P7 is connected with the movable end of the first relay K2, and the first relay K2 acts according to the level signal;
The high-low voltage switch driving unit includes: the first optical coupler U1, the second optical coupler U2 and the second relay K1; the interface 3 of the first optocoupler U1 is connected with the interface 4 of the second optocoupler U2, the interface 3 of the second optocoupler U2 is connected with the second relay K1, and the second relay K1 acts according to the received level signal.
As an improvement of the power equipment switch driving circuit, when the first relay K2 receives a high-level signal, the first relay K2 is closed, so that the fan interface P7 is communicated with a fan; when the first relay K2 receives the low-level signal, the first relay K2 is disconnected, so that the fan interface P7 is disconnected from the fan.
As an improvement of the power equipment switch driving circuit, the receiving port JOUT1 receives a level signal sent by an external CPU module.
As an improvement of the power equipment switch driving circuit, the CPU module is a chip with the model of S3C 2440A.
As an improvement of the power equipment switch driving circuit, the first optical coupler U1 and the second optical coupler U2 are TLP627 optical couplers.
As an improvement of the power equipment switch driving circuit, the second relay K1 is a G6B-2214P-US type relay.
As an improvement of the power equipment switch driving circuit, when the second relay K1 receives a high-level signal, the contact of the second relay K1 is kept in a normally open state; and when the second relay K1 receives a low-level signal, the contact of the second relay K1 is kept in a closed state.
As an improvement of the power equipment switch driving circuit, the high-low voltage switch driving unit further comprises a diode D9 and a capacitor C9; the diode D9 and the capacitor C9 are respectively connected in parallel with two ends of the coil in the second relay K1.
Compared with the prior art, the utility model has the beneficial effects that: in the power equipment switch driving circuit, the fan control unit can effectively prevent the misoperation of the relay due to the adoption of TLP521 type optocoupler isolation, the fan starting mode is divided into a manual mode and an automatic mode, and the fan can only be in one mode at the same time, so that the fan can work effectively. Furthermore, in the high-low voltage switch driving unit, the connection mode of the two optical couplers can effectively prevent CPUI/O port output errors caused by interference. In addition, the diode and the capacitor are connected in parallel at the two ends of the relay coil, so that adverse effects on the circuit caused by reverse electromotive force generated at the moment of power failure of the relay are effectively prevented.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present utility model, and other drawings may be obtained according to the drawings without inventive effort to those skilled in the art.
FIG. 1 is a circuit diagram of a blower control unit in an embodiment of a power device switch driving circuit according to the present utility model;
Fig. 2 is a circuit diagram of a high-low voltage switch driving unit in an embodiment of the power device switch driving circuit according to the present utility model.
Description of the embodiments
The present utility model will be described in detail with reference to the following embodiments, but it should be understood that these embodiments are not limiting, and functional, method, or structural equivalents and alternatives thereof by those skilled in the art are within the scope of the present utility model.
As shown in fig. 1 and 2, an embodiment of the present disclosure provides a power device switch driving circuit, which includes: a fan control unit 10 and a high-low voltage switch driving unit 20.
The fan control unit 10 is used for realizing the start and stop of fan equipment in the solar transformer substation. Specifically, the fan control unit 10 includes: receiving port JOUT1, isolation optocoupler U13, first relay K2 and fan interface P7; the receiving port JOUT1 receives an external level signal, the isolation optocoupler U13 is connected between the receiving port JOUT1 and the first relay K2, the fan interface P7 is connected with the movable end of the first relay K2, and the first relay K2 acts according to the level signal. Wherein, the receiving port JOUT1 receives the level signal sent by the external CPU module. In one embodiment, the CPU module is a chip of model S3C 2440A.
When the fan control unit 10 works and the monitored temperature is higher than the fan starting temperature, the CPU module gives a high level to the receiving port JOUT1 so as to conduct a circuit, the first relay K2 is closed, and the fan is started to cool; when the temperature is reduced to the fan closing temperature, the CPU module gives a low level to the receiving port JOUT1 so that the circuit does not conduct the fan to stop working. It should be noted that, in the manual mode for starting the fan described in this embodiment, the CPU module controls the operation and stop of the fan by giving the high-low level to the receiving port JOUT 1.
The high-low voltage switch driving unit 20 is used for switching on and off the switch equipment in the solar transformer substation. Specifically, the high-low voltage switch driving unit 20 includes: the first optical coupler U1, the second optical coupler U2 and the second relay K1; the interface 3 of the first optocoupler U1 is connected with the interface 4 of the second optocoupler U2, the interface 3 of the second optocoupler U2 is connected with the second relay K1, and the second relay K1 acts according to the received level signal.
In one embodiment, the first optical coupler U1 and the second optical coupler U2 are TLP627 optical couplers. The second relay K1 is a G6B-2214P-US type relay. The TLP627 optical coupler has a darlington circuit therein, which is a current transmission ratio CTR (Current Transfer Ratio), and the coefficient is at least 1000%, and the darlington driving circuit can be omitted in the external circuit. The maximum forward conduction current allowed by TLP627 is 25mA, the normal working temperature is-25-85 ℃, and the reaction time is less than 80 mu s. By using two TLTP627 optocoupler control inputs, this design can prevent I/O port output errors due to disturbances.
Further, the G6B-2214P-US type relay is a low-power consumption ultra-small double-pole double-throw normally open type relay, the contact capacity can reach 1250VA, the maximum contact current can reach 5A DC, the recommended driving voltage is 24V, the driving circuit is 12.5mA, and the internal coil resistance is 1920 omega.
Thus, when the high-low voltage switch driving unit 20 works and the two I/O ports of the second relay K1 are controlled to output a logic high level of "1", no current passes through the photodiode of the optocoupler, the triode circuit is not conducted at this time, no voltage is applied to two ends of the second relay K1, and the contacts of the second relay K1 are kept in a normally open state. When the output logic low level of the two I/O ports is 0, current flows through the photosensitive diode of the optocoupler, the triode circuit is conducted at the moment, and the input voltage and the current meet the working condition of the second relay K1 to drive external switching equipment.
In addition, the high-low voltage switch driving unit 20 further includes a diode D9 and a capacitor C9; the diode D9 and the capacitor C9 are respectively connected in parallel with two ends of the coil in the second relay K1. Therefore, the diode and the capacitor are connected in parallel at the two ends of the relay coil, so that adverse effects on the circuit caused by reverse electromotive force generated at the moment of power failure of the relay are effectively prevented.
In summary, in the power equipment switch driving circuit, the fan control unit can effectively prevent the misoperation of the relay due to the adoption of the TLP521 type optocoupler isolation, the fan starting mode is divided into a manual mode and an automatic mode, and the fan can only be in one mode at the same time, so that the fan can work effectively. Furthermore, in the high-low voltage switch driving unit, the connection mode of the two optical couplers can effectively prevent CPUI/O port output errors caused by interference. In addition, the diode and the capacitor are connected in parallel at the two ends of the relay coil, so that adverse effects on the circuit caused by reverse electromotive force generated at the moment of power failure of the relay are effectively prevented.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (8)
1. A power device switch drive circuit, the power device switch drive circuit comprising: a fan control unit and a high-low voltage switch driving unit;
The fan control unit includes: receiving port JOUT1, isolation optocoupler U13, first relay K2 and fan interface P7; the receiving port JOUT1 receives an external level signal, the isolation optocoupler U13 is connected between the receiving port JOUT1 and the first relay K2, the fan interface P7 is connected with the movable end of the first relay K2, and the first relay K2 acts according to the level signal;
The high-low voltage switch driving unit includes: the first optical coupler U1, the second optical coupler U2 and the second relay K1; the interface 3 of the first optocoupler U1 is connected with the interface 4 of the second optocoupler U2, the interface 3 of the second optocoupler U2 is connected with the second relay K1, and the second relay K1 acts according to the received level signal.
2. The power equipment switch driving circuit according to claim 1, wherein when the first relay K2 receives a high level signal, the first relay K2 is closed, so that the fan interface P7 is turned on with a fan; when the first relay K2 receives the low-level signal, the first relay K2 is disconnected, so that the fan interface P7 is disconnected from the fan.
3. The power device switch driving circuit according to claim 1, wherein the reception port JOUT1 receives a level signal transmitted from an external CPU module.
4. The power device switch driving circuit according to claim 3, wherein the CPU module is a chip of model S3C 2440A.
5. The power device switch driving circuit according to claim 1, wherein the first optical coupler U1 and the second optical coupler U2 are TLP627 type optical couplers.
6. The power device switch driving circuit according to claim 1, wherein the second relay K1 is a G6B-2214P-US type relay.
7. The power equipment switch driving circuit according to claim 1, wherein the second relay K1 contact maintains a normally open state when the second relay K1 receives a high level signal; and when the second relay K1 receives a low-level signal, the contact of the second relay K1 is kept in a closed state.
8. The power equipment switch driving circuit according to claim 1, wherein the high-low voltage switch driving unit further comprises a diode D9 and a capacitor C9; the diode D9 and the capacitor C9 are respectively connected in parallel with two ends of the coil in the second relay K1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322611494.4U CN220914073U (en) | 2023-09-26 | 2023-09-26 | Power equipment switch driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322611494.4U CN220914073U (en) | 2023-09-26 | 2023-09-26 | Power equipment switch driving circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220914073U true CN220914073U (en) | 2024-05-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322611494.4U Active CN220914073U (en) | 2023-09-26 | 2023-09-26 | Power equipment switch driving circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220914073U (en) |
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2023
- 2023-09-26 CN CN202322611494.4U patent/CN220914073U/en active Active
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