CN219329604U - Overload protection circuit of mining base station controller - Google Patents
Overload protection circuit of mining base station controller Download PDFInfo
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- CN219329604U CN219329604U CN202223054498.9U CN202223054498U CN219329604U CN 219329604 U CN219329604 U CN 219329604U CN 202223054498 U CN202223054498 U CN 202223054498U CN 219329604 U CN219329604 U CN 219329604U
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Abstract
The utility model relates to the technical field of overload protection circuits, in particular to a mining base station controller overload protection circuit, which comprises a detection circuit and a delay alarm circuit, wherein the detection circuit is electrically connected with the delay alarm circuit, the detection circuit comprises a voltage comparator and a field effect transistor, the grid electrode of the field effect transistor is connected with the output end of the voltage comparator, the output end of the delay alarm circuit is connected with a relay, the delay alarm circuit comprises two operational amplifiers, a plurality of resistors and a capacitor, the capacitor is charged through the resistors to carry out alarm delay, the capacitor is charged to complete the conduction of a triode, and the buzzer gives an alarm to control the relay to turn off the controller. When the average load current of the circuit is smaller and the element is overloaded briefly in the bearable range, the alarm lamp is used for prompting, when the overload time of the circuit is too long and the average load current is larger, the load equipment is considered to be faulty, the alarm is sent out through the buzzer for prompting, and the relay is controlled to turn off the power supply.
Description
Technical Field
The utility model relates to the technical field of overload protection circuits, in particular to an overload protection circuit of a mining base station controller.
Background
Because there is no wireless signal under the mine, the communication between the underground workers and the ground is needed to be completed by the base station, and the workers in different places on the mine and under the mine can conveniently communicate information through the interconnection of the base station controllers. In order to save cost, a mining base station controller is often connected with a plurality of loads, overload phenomenon is easy to occur due to excessive loads, and a temperature control switch is arranged in part of the mining base station controller, but the mining base station controller does not solve the problem of motor temperature, and is powered off instantaneously only when the motor is impacted by current, the power-off time has no accuracy and no guarantee.
Disclosure of Invention
The utility model aims to solve the defects in the background technology by providing an overload protection circuit of a mining base station controller.
The technical scheme adopted by the utility model is as follows:
the utility model provides a mining base station controller overload protection circuit, including detection circuitry and delay alarm circuit, detection circuitry electricity connects delay alarm circuit, detection circuitry includes a voltage comparator and field effect transistor, the field effect transistor grid is connected the voltage comparator output, delay alarm circuit output connection relay, delay alarm circuit includes two operational amplifier, a plurality of resistance and a plurality of electric capacity, charges the electric capacity through the resistance and delays the warning, and the electric capacity charges and accomplishes and make the triode switch on, and the buzzer sends the alarm, control relay turn-off control ware.
As a preferred technical scheme of the utility model: the detection circuit further comprises six resistors from the first resistor to the sixth resistor and two capacitors, wherein the six resistors are 1KΩ, and the two capacitors are 100nF; the controller power supply is connected with the first resistor, the first end of the first resistor is respectively connected with the controller power supply and the first end of the second resistor, the second end of the second resistor is grounded, the second end of the second resistor is connected with the first end of the first capacitor and the positive input end of the voltage comparator, the reverse input end of the voltage comparator is respectively connected with the first end of the second capacitor and the first end of the fourth resistor, the output end of the voltage comparator is connected with the first end of the seventh resistor, the second end of the seventh resistor is connected with the grid electrode of the field effect transistor, the second end of the first capacitor is grounded, the second end of the second capacitor is grounded, the second end of the fourth resistor is respectively connected with the first end of the third resistor and the first end of the fifth resistor, the second end of the third resistor is connected with the power supply, and the second end of the fifth resistor is grounded, and the sixth resistor is connected with the power supply voltage.
As a preferred technical scheme of the utility model: the detection circuit also comprises a warning lamp, the anode of the warning lamp is connected with the sixth resistor, the output end of the voltage comparator and the seventh resistor, and the cathode of the warning lamp is grounded.
As a preferred technical scheme of the utility model: the delay alarm circuit comprises eleven resistors from a seventh resistor to a seventeenth resistor, four capacitors, two operational amplifiers, two diodes and a field effect tube, wherein the first end of the seventh resistor is connected with the output end of the detection circuit, the second end of the seventh resistor is connected with the grid electrode of the field effect tube, the source electrode of the field effect tube is grounded, the drain electrode is respectively connected with the first end of the eighth resistor and the cathode of the second diode, the first end of the third capacitor is connected with the power supply of the controller, the second end of the third capacitor is respectively connected with the first end of the fourth capacitor and the grounded, the second end of the fourth capacitor is respectively connected with the second end of the eighth resistor and the non-inverting input end of the first operational amplifier, the inverting input end of the first operational amplifier is respectively connected with the first end of the ninth resistor and the first end of the tenth resistor, the second end of the ninth resistor is connected with the power supply of the controller, the second end of the tenth resistor is grounded, the output end of the first operational amplifier is respectively connected with the first end of the eleventh resistor, the first end of the twelfth resistor and the non-inverting input end of the second operational amplifier, the second end of the eleventh resistor is connected with the power supply of the controller, the second end of the twelfth resistor is connected with the first end of the fifth capacitor, the second end of the fifth capacitor is grounded, the inverting input end of the second operational amplifier is connected with the first end of the thirteenth resistor and the first end of the fourteenth resistor, the second end of the thirteenth resistor is connected with the power supply of the controller, the second end of the fourteenth resistor is grounded, the output end of the second operational amplifier is respectively connected with the first end of the fifteenth resistor and the anode of the first diode, the second end of the fifteenth resistor is connected with the power supply of the controller, the cathode of the first end of the first diode is connected with the first end of the sixteenth resistor, the second end of the sixteenth resistor is respectively connected with the first end of the sixth capacitor and the seventeenth resistor, the second end of the sixth capacitor is grounded, wherein the twelfth resistor is 50KΩ, the sixteenth resistor is 3.3 KΩ, and the rest resistors are 1KΩ, all four capacitances were 100nF.
As a preferred technical scheme of the utility model: the delay alarm circuit is also connected in series with a triode, the base electrode of the triode is connected with the second end of the sixteenth resistor, the emitter is grounded, and the collector is connected with the anode of the second diode.
As a preferred technical scheme of the utility model: the delay alarm circuit is also connected in series with a buzzer, the first end of the buzzer is connected with the collector electrode of the triode, and the second end of the buzzer is grounded.
As a preferred technical scheme of the utility model: the triode is NPN type.
Compared with the prior art, the overload protection circuit for the mining base station controller has the beneficial effects that:
according to the overload protection circuit for the mining base station controller, when the average load current of the circuit is small and the element is overloaded briefly in the bearable range, the alarm lamp is used for prompting, when the overload time of the circuit is too long and the average load current is large, the load equipment is considered to be faulty, an alarm is sent out through the buzzer for prompting, and the relay is controlled to turn off the power supply.
Drawings
Fig. 1 is a circuit diagram of overload protection according to a preferred embodiment of the present utility model.
Detailed Description
It should be noted that, under the condition of no conflict, the embodiments of the present embodiments and features in the embodiments may be combined with each other, and the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model, and obviously, the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1, the preferred embodiment of the utility model provides an overload protection circuit of a mining base station controller, which comprises a detection circuit and a delay alarm circuit, wherein the detection circuit comprises a voltage comparator and a field effect transistor, the grid electrode of the field effect transistor is connected with the output end of the voltage comparator, the detection circuit is electrically connected with the delay alarm circuit, the delay alarm circuit comprises two operational amplifiers, a plurality of resistors and a plurality of capacitors, the output end of the delay alarm circuit is connected with a relay, the delay alarm circuit charges the capacitors through the resistors to carry out alarm delay, the capacitor charging is completed to enable a triode to be conducted, the buzzer sends an alarm, and the relay is controlled to turn off the controller.
The detection circuit detects the voltage state of the circuit through the voltage comparator, compares and outputs the overload voltage, and the overload indicator lights are turned on to enable the field effect transistor to be conducted, the field effect transistor outputs the voltage to the delay alarm circuit, the delay alarm circuit charges the fifth capacitor through the two operational amplifiers, and the voltage overload alarm is sent out through the buzzer when the charging completion circuit is still overloaded. When the detection circuit is in an overload state, the indication lamp is turned on to prompt, and the delay alarm circuit has a certain delay time, so that erroneous judgment caused by short-term circuit overload condition is prevented.
The detection circuit further comprises six resistors from the first resistor to the sixth resistor and two capacitors, wherein the six resistors are 1KΩ, and the two capacitors are 100nF; the controller power supply is connected with the first resistor, the first end of the first resistor is respectively connected with the controller power supply and the first end of the second resistor, the second end of the second resistor is grounded, the second end of the second resistor is connected with the first end of the first capacitor and the positive input end of the voltage comparator, the reverse input end of the voltage comparator is respectively connected with the first end of the second capacitor and the first end of the fourth resistor, the output end of the voltage comparator is connected with the first end of the seventh resistor, the second end of the seventh resistor is connected with the grid electrode of the field effect transistor, the second end of the first capacitor is grounded, the second end of the second capacitor is grounded, the second end of the fourth resistor is respectively connected with the first end of the third resistor and the first end of the fifth resistor, the second end of the third resistor is connected with the power supply, and the second end of the fifth resistor is grounded, and the sixth resistor is connected with the power supply voltage.
The detection circuit also comprises a warning lamp, the anode of the warning lamp is connected with the sixth resistor, the output end of the voltage comparator and the seventh resistor, and the cathode of the warning lamp is grounded.
The detection circuit sets threshold voltage through the third resistor and the fifth resistor, voltage on the controller is obtained through voltage on the first resistor, the second resistor, the first capacitor, the fourth resistor and the second capacitor respectively form a filter circuit, when the controller works normally, the voltage at the left end of the second resistor is larger than the voltage at the left end of the fourth resistor, the comparator outputs low level, the warning lamp is in an extinction state, when the controller is overloaded, current flowing through the first resistor is large, voltage drop on the first resistor is increased, the voltage at the left end of the second resistor is increased and is larger than the voltage at the left end of the fourth resistor, the comparator outputs high level, and the overload indicator lamp is lightened.
The delay alarm circuit comprises eleven resistors from a seventh resistor to a seventeenth resistor, four capacitors, two operational amplifiers, two diodes and a field effect tube, wherein the first end of the seventh resistor is connected with the output end of the detection circuit, the second end of the seventh resistor is connected with the grid electrode of the field effect tube, the source electrode of the field effect tube is grounded, the drain electrode is respectively connected with the first end of the eighth resistor and the cathode of the second diode, the first end of the third capacitor is connected with the power supply of the controller, the second end of the third capacitor is respectively connected with the first end of the fourth capacitor and the grounded, the second end of the fourth capacitor is respectively connected with the second end of the eighth resistor and the non-inverting input end of the first operational amplifier, the inverting input end of the first operational amplifier is respectively connected with the first end of the ninth resistor and the first end of the tenth resistor, the second end of the ninth resistor is connected with the power supply of the controller, the second end of the tenth resistor is grounded, the output end of the first operational amplifier is respectively connected with the first end of the eleventh resistor, the first end of the twelfth resistor and the non-inverting input end of the second operational amplifier, the second end of the eleventh resistor is connected with the power supply of the controller, the second end of the twelfth resistor is connected with the first end of the fifth capacitor, the second end of the fifth capacitor is grounded, the inverting input end of the second operational amplifier is connected with the first end of the thirteenth resistor and the first end of the fourteenth resistor, the second end of the thirteenth resistor is connected with the power supply of the controller, the second end of the fourteenth resistor is grounded, the output end of the second operational amplifier is respectively connected with the first end of the fifteenth resistor and the anode of the first diode, the second end of the fifteenth resistor is connected with the power supply of the controller, the cathode of the first end of the first diode is connected with the first end of the sixteenth resistor, the second end of the sixteenth resistor is respectively connected with the first end of the sixth capacitor and the seventeenth resistor, the second end of the sixth capacitor is grounded, wherein the twelfth resistor is 50KΩ, the sixteenth resistor is 3.3 KΩ, and the rest resistors are 1KΩ, all four capacitances were 100nF.
The delay alarm circuit is also connected in series with a triode, the base electrode of the triode is connected with the second end of the sixteenth resistor, the emitter is grounded, and the collector is connected with the anode of the second diode.
The delay alarm circuit is also connected in series with a buzzer, the first end of the buzzer is connected with the collector electrode of the triode, and the second end of the buzzer is grounded.
The triode is NPN type.
The VIN pin that delay alarm circuit connects current control formula pulse width modulation chip, carries out power protection according to the feedback condition of circuit, and the output of two operational amplifier in the circuit and inverting input connect VIN pin jointly, and output voltage actual direction is from the common end of arithmetic ware to the output, and twelfth resistance charges for the fifth electric capacity, when charging the partial pressure value on the fourteenth resistance, and second operational amplifier syntropy input output high level makes the triode switch on, and buzzer LS sends the alarm to control draws low power supply voltage and locks the power simultaneously. The NPN type triode has the function of a stabilizing circuit.
In this embodiment, the controller is connected to the first end of R1, the first end of R1 is connected to the first end of controller and R2 respectively, the second end is grounded, the second end of R2 is connected to the first end of C1 and the positive input end of the voltage comparator respectively, the second end of C1 is grounded, the reverse input end of the voltage comparator is connected to the first end of C2 and the first end of R4 respectively, the second end of C2 is grounded, the second end of R4 is connected to the first end of R3 and the first end of R5 respectively, the second end of R3 is connected to the power supply, the second end of R5 is grounded, the R6 is connected to the power supply voltage, the output end of the voltage comparator and the anode of the warning lamp LED, and the cathode of the warning lamp LED is grounded. The first end of R7 is connected with the output end of the detection circuit, the second end of R7 is connected with the grid electrode of the field effect tube, the source electrode of the field effect tube is grounded, the drain electrode is respectively connected with the first end of C3, the first end of R8 and the cathode electrode of D2, the second end of C3 is respectively connected with the first end of C4 and the ground, the second end of C4 is respectively connected with the second end of R8 and the non-inverting input end of T1, the inverting input end of T1 is respectively connected with the first end of R9 and the first end of R10, the second end of R9 is grounded, the output end of T1 is respectively connected with the first end of R11, the first end of R12 and the non-inverting input end of T2, the second end of R11 is connected with the power supply, the second end of R12 is connected with the C5, the second end of C5 is grounded, the inverting input end of T2 is connected with the first end of R13 and the first end of R14, the second end of R13 is grounded, the output end of T2 is respectively connected with the first end of R15 and the anode electrode of D1, the second end of R15 is connected with the power supply, the cathode electrode of D1 is connected with the first end of R16, the second end of R16 is respectively connected with the first end of R6, the second end of R16 is grounded, the base electrode is respectively connected with the first end of Q1 is connected with the first end of Q1 and the emitter, the emitter is grounded, and the emitter is respectively 1 is grounded.
The threshold voltage is set through R3 and R5, the voltage on the controller is obtained through the voltage of R1, R2, C1, R4 and C2 respectively form a filter circuit, when the controller works normally, the voltage at the left end of R2 is larger than the voltage at the left end of R4, the comparator outputs a low level, the warning lamp is in an extinguishing state, when the controller is overloaded, the current flowing through the R1 becomes large, the voltage drop on the R1 is increased, the voltage at the left end of R2 is increased and is larger than the voltage at the left end of R4, the comparator outputs a high level, and the overload indicator lamp is lightened. When the output voltage is greater than the starting voltage of the field effect transistor, the R12 in the delay alarm circuit charges C5, and the delay time is as follows:
t＝-R12C5ln(1-(R14/(R13+R14)Umax))
＝-5ln(1-(1/2)
where Umax is the operational amplifier output maximum voltage.
When the partial voltage value on R14 is charged, the T2 outputs high level to the input end in the same direction, so that Q1 is conducted, the buzzer LS gives an alarm, the power supply voltage is pulled down, the power supply is locked, and the detection circuit of staff is waited.
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. Any reference sign in a claim should not be construed as limiting the claim concerned.
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 (7)
1. Overload protection circuit of mining base station controller, including detection circuitry and delay alarm circuit, its characterized in that: the detection circuit is electrically connected with the delay alarm circuit, the detection circuit comprises a voltage comparator and a field effect transistor, the grid electrode of the field effect transistor is connected with the output end of the voltage comparator, the output end of the delay alarm circuit is connected with a relay, the delay alarm circuit comprises two operational amplifiers, a plurality of resistors and a plurality of capacitors, the capacitors are charged through the resistors to carry out alarm delay, the capacitors are charged to complete conduction of the triode, the buzzer sends out an alarm, and the relay is controlled to turn off the controller.
2. The mining base station controller overload protection circuit of claim 1, wherein: the detection circuit further comprises six resistors from the first resistor to the sixth resistor and two capacitors, wherein the six resistors are 1KΩ, and the two capacitors are 100nF; the controller power supply is connected with the first resistor, the first end of the first resistor is respectively connected with the controller power supply and the first end of the second resistor, the second end of the second resistor is grounded, the second end of the second resistor is connected with the first end of the first capacitor and the positive input end of the voltage comparator, the reverse input end of the voltage comparator is respectively connected with the first end of the second capacitor and the first end of the fourth resistor, the output end of the voltage comparator is connected with the first end of the seventh resistor, the second end of the seventh resistor is connected with the grid electrode of the field effect transistor, the second end of the first capacitor is grounded, the second end of the second capacitor is grounded, the second end of the fourth resistor is respectively connected with the first end of the third resistor and the first end of the fifth resistor, the second end of the third resistor is connected with the power supply, and the second end of the fifth resistor is grounded, and the sixth resistor is connected with the power supply voltage.
3. The mining base station controller overload protection circuit of claim 2, wherein: the detection circuit also comprises a warning lamp, the anode of the warning lamp is connected with the sixth resistor, the output end of the voltage comparator and the seventh resistor, and the cathode of the warning lamp is grounded.
4. A mining base station controller overload protection circuit according to claim 3, wherein: the delay alarm circuit comprises eleven resistors from a seventh resistor to a seventeenth resistor, four capacitors, two operational amplifiers, two diodes and a field effect tube, wherein the first end of the seventh resistor is connected with the output end of the detection circuit, the second end of the seventh resistor is connected with the grid electrode of the field effect tube, the source electrode of the field effect tube is grounded, the drain electrode is respectively connected with the first end of the eighth resistor and the cathode of the second diode, the first end of the third capacitor is connected with the power supply of the controller, the second end of the third capacitor is respectively connected with the first end of the fourth capacitor and the grounded, the second end of the fourth capacitor is respectively connected with the second end of the eighth resistor and the non-inverting input end of the first operational amplifier, the inverting input end of the first operational amplifier is respectively connected with the first end of the ninth resistor and the first end of the tenth resistor, the second end of the ninth resistor is connected with the power supply of the controller, the second end of the tenth resistor is grounded, the output end of the first operational amplifier is respectively connected with the first end of the eleventh resistor, the first end of the twelfth resistor and the non-inverting input end of the second operational amplifier, the second end of the eleventh resistor is connected with the power supply of the controller, the second end of the twelfth resistor is connected with the first end of the fifth capacitor, the second end of the fifth capacitor is grounded, the inverting input end of the second operational amplifier is connected with the first end of the thirteenth resistor and the first end of the fourteenth resistor, the second end of the thirteenth resistor is connected with the power supply of the controller, the second end of the fourteenth resistor is grounded, the output end of the second operational amplifier is respectively connected with the first end of the fifteenth resistor and the anode of the first diode, the second end of the fifteenth resistor is connected with the power supply of the controller, the cathode of the first end of the first diode is connected with the first end of the sixteenth resistor, the second end of the sixteenth resistor is respectively connected with the first end of the sixth capacitor and the seventeenth resistor, the second end of the sixth capacitor is grounded, wherein the twelfth resistor is 50KΩ, the sixteenth resistor is 3.3 KΩ, and the rest resistors are 1KΩ, all four capacitances were 100nF.
5. The mining base station controller overload protection circuit of claim 4, wherein: the delay alarm circuit is also connected in series with a triode, the base electrode of the triode is connected with the second end of the sixteenth resistor, the emitter is grounded, and the collector is connected with the anode of the second diode.
6. The mining base station controller overload protection circuit of claim 5, wherein: the delay alarm circuit is also connected in series with a buzzer, the first end of the buzzer is connected with the collector electrode of the triode, and the second end of the buzzer is grounded.
7. The mining base station controller overload protection circuit of claim 6, wherein: the triode is NPN type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223054498.9U CN219329604U (en) | 2022-11-17 | 2022-11-17 | Overload protection circuit of mining base station controller |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223054498.9U CN219329604U (en) | 2022-11-17 | 2022-11-17 | Overload protection circuit of mining base station controller |
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| Publication Number | Publication Date |
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| CN219329604U true CN219329604U (en) | 2023-07-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202223054498.9U Active CN219329604U (en) | 2022-11-17 | 2022-11-17 | Overload protection circuit of mining base station controller |
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- 2022-11-17 CN CN202223054498.9U patent/CN219329604U/en active Active
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