CN211015190U - Isolated high-efficiency high-precision voltage stabilizing circuit - Google Patents
Isolated high-efficiency high-precision voltage stabilizing circuit Download PDFInfo
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- CN211015190U CN211015190U CN201922496696.2U CN201922496696U CN211015190U CN 211015190 U CN211015190 U CN 211015190U CN 201922496696 U CN201922496696 U CN 201922496696U CN 211015190 U CN211015190 U CN 211015190U
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Abstract
The utility model discloses a high-efficient high accuracy voltage stabilizing circuit of isolated form relates to voltage stabilizing circuit technical field, aims at solving current supply circuit when supplying power for position sensor, because its power can produce the harmonic component, and position sensor's voltage value is because the input leads to its output probably also can have the harmonic component for the harmonic component, consequently its in-process that carries out the sampling to P L C can lead to the technical problem of great error, and its technical scheme main points are including power conversion module and steady voltage module, the input of power conversion module is coupled in the electric wire netting of market, the output of power conversion module is coupled in the input of steady voltage module, the output of steady voltage module is used for exporting steady voltage.
Description
Technical Field
The utility model relates to a voltage stabilizing circuit technical field, more specifically say, it relates to a high-efficient high accuracy voltage stabilizing circuit of isolated form.
Background
A position sensor is a sensor that senses the position of an object and converts it into a usable output signal. The position sensor needs to be powered during use to ensure its proper operation.
The utility model discloses a DC5V power supply unit for P L C internal data processing module and a DC24V power supply unit for I/O interface, the input end of which is connected to a 220V AC power supply, the public negative pole of which is correspondingly connected, wherein, the DC5V power supply unit and the DC24V power supply unit respectively comprise a transformer, a rectifier, a filter and a voltage stabilizer, the 220V AC power supply is reduced in voltage by the transformer and then enters the voltage stabilizer through the rectifier to be processed to obtain corresponding DC output, the input end and the output end of the voltage stabilizer are respectively connected with the filter.
However, when the conventional power supply circuit supplies power to the position sensor, harmonic components may be generated from the power supply, and harmonic components may also exist in the output of the voltage value of the position sensor due to the harmonic components input to the position sensor, so that a large error may be caused in the process of inputting the voltage value to the P L C for sampling, and thus the improvement is needed.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, the utility model aims to provide a high-efficient high accuracy voltage stabilizing circuit of isolated form, it has the voltage precision of output higher, can not produce the advantage of error to the registration of sensor because of the harmonic.
In order to achieve the above purpose, the utility model provides a following technical scheme:
an isolated high-efficiency high-precision voltage stabilizing circuit comprises a power supply conversion module and a voltage stabilizing module, wherein the input end of the power supply conversion module is coupled to a commercial power grid, the output end of the power supply conversion module is coupled to the input end of the voltage stabilizing module, and the output end of the voltage stabilizing module is used for outputting voltage stabilizing voltage.
By adopting the technical scheme, the power conversion module is arranged to directly convert 220V alternating current into 15V direct current, and because harmonic components exist in the general converted direct current, but the conversion efficiency is high and can reach about 75 percent of conversion efficiency, the power conversion module is adopted to transform and rectify the voltage in advance to convert the voltage into 15VDC, and then the voltage is stabilized by the linear stabilized power supply to output high-precision voltage signals with less harmonic waves, so that the detection precision of the sensor is ensured.
Further, the power conversion module is an L D01-10B15 type isolation switch power supply.
By adopting the technical scheme, because the rated voltage of the P L C receiving end is 10V, the voltage applied to the two ends of the sensor is generally 10V, and the L D01-10B15 type isolation switch power supply converts 220V alternating current into 15V direct current through high conversion efficiency, so that only about 5V voltage is lost when the voltage stabilizing filter wave is carried out later, the resource is saved, and the utilization efficiency of the voltage is improved.
The voltage stabilizing module comprises a first resistor, a first triode, a voltage stabilizing source, a reference resistor, an adjusting resistor and a divider resistor, wherein the reference resistor, the adjusting resistor and the divider resistor are connected in series with the output end of the power supply conversion module; the emitting electrode of the first triode is connected to the positive electrode of the output end of the voltage stabilizing module, the emitting electrode of the first triode is connected to the positive electrode of the output end of the power supply conversion module, and the first resistor is connected between the base electrode and the collector electrode of the first triode in series.
By adopting the technical scheme, because the reference voltage of the voltage stabilizing source is 2.5V, when the output feedback is introduced at the REF end, the device can control the output voltage through shunting from the cathode to the anode in a wide range. When the reference resistor, the divider resistor and the adjusting resistor are determined, the voltage Vo = 2.5(1+ R2/R3+ R4/R3) at the output end of the voltage stabilizing module, and the output end of the voltage stabilizing module can output a stable 10V voltage by adjusting the resistance value of R2.
Furthermore, a self-recovery fuse is connected in series between the emitter of the first triode and the divider resistor.
Through adopting above-mentioned technical scheme, the setting of self-resuming fuse can be when first triode overflows with the circuit disconnection to prevent that the triode from being burnt out.
Further, the adjusting resistor is a slide rheostat.
Through adopting above-mentioned technical scheme, the setting of slide rheostat is convenient for adjust the resistance of adjusting resistance to can finely tune voltage stabilizing module's output voltage.
Furthermore, a filter capacitor is connected in series between the output ends of the power conversion modules.
Through adopting above-mentioned technical scheme, the voltage of being convenient for to power conversion module output filters through the setting of filter capacitor, filters out the ripple of output voltage.
Further, a temperature detection module arranged around the first triode is connected between the filter capacitor and the voltage stabilizing module, the temperature detection module is coupled with a comparison module used for outputting a comparison signal, the inverting terminal of the comparison module is coupled with a reference circuit, the output terminal of the comparison module is coupled with a control module used for outputting a control signal, and the control module is coupled with a radiator responding to the control signal to drive the fan to rotate.
Through adopting above-mentioned technical scheme, the temperature detection module set up be convenient for to the triode and around the temperature check through comparison module and benchmark comparison, send control signal for the radiator when exceeding the benchmark, dispel the heat to the temperature around the triode.
Furthermore, a reminding device is connected in series in the control module.
By adopting the technical scheme, the setting of the reminding device reminds the working state of the cooling fan, so that the triode is reminded of being in a cooling state due to overhigh temperature.
To sum up, the utility model discloses following beneficial effect has:
1. the technology that an L D01-10B15 type isolation switch power supply is matched with a voltage stabilizing module is adopted, so that the effects of improving the output efficiency of the power supply and improving the output precision of the power supply are achieved;
2. the technology that the first resistor, the first triode, the voltage stabilizing source, the reference resistor, the adjusting resistor and the divider resistor are matched is adopted, so that the effect that the voltage stabilizing module can output stable and high-precision voltage conveniently is achieved;
3. the technology that the self-recovery fuse, the temperature detection module, the comparison module, the reference circuit, the control module, the radiator and the reminding device are matched is adopted, and therefore the effect that the triode is prevented from being damaged due to more heat accumulation is achieved.
Drawings
FIG. 1 is a circuit diagram of an isolated high-efficiency high-precision voltage regulator circuit according to an embodiment.
In the figure: 1. a power conversion module; 2. a voltage stabilization module; 3. a temperature detection module; 31. a reference circuit; 311. a comparison module; 32. a control module; 33. a heat sink; 34. a reminding device.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example (b):
an isolated high-efficiency high-precision voltage stabilizing circuit refers to fig. 1 and comprises a power supply conversion module 1 and a voltage stabilizing module 2, wherein the power supply conversion module 1 is an L D01-10B15 type isolation switch power supply, the output voltage of the power supply conversion module is 15V, the output voltage generally has harmonic components, the input end of the power supply conversion module 1 is coupled to a commercial power grid, the output end of the power supply conversion module 1 is coupled to the input end of the voltage stabilizing module 2, the output end of the voltage stabilizing module 2 is used for outputting stabilized voltage, and a filter capacitor C1 is connected between the output ends of the power supply conversion module 1 in series and used for filtering ripples of the output voltage of the power supply.
The voltage stabilizing module 2 comprises a first resistor R1, a first triode Q1, a voltage regulator Q3, a reference resistor R3, an adjusting resistor R2 and a voltage dividing resistor R4, wherein the adjusting resistor R2 is a slide rheostat. The reference resistor R3, the adjusting resistor R2 and the voltage dividing resistor R4 are connected in series with the output end of the power supply conversion module 1, the connection point of the reference resistor R3 and the voltage dividing resistor R4 is connected with the R pole of the voltage stabilizing source Q3, the A pole of the voltage stabilizing source Q3 is connected with the negative pole of the output end of the power supply conversion module 1, and the K pole of the voltage stabilizing source Q3 is connected with the base electrode of the first triode Q1.
An emitter of the first triode Q1 is connected to the positive electrode of the output end of the power conversion module 1, and a self-recovery fuse F1 is connected in series between the emitter of the first triode Q1 and the voltage dividing resistor R4. The emitter of the first transistor Q1 is connected to the positive electrode of the output terminal of the regulator module 2, and the first resistor R1 is connected in series between the base and the collector of the first transistor Q1.
The temperature detection module 3 arranged around the first triode Q1 is connected between the filter capacitor C1 and the voltage stabilizing module 2, the temperature detection module 3 comprises a thermistor RT and a first voltage division reference resistor Rn1 which are connected in series between the output ends of the voltage stabilizing module 2, and the thermistor RT is a positive temperature coefficient thermistor. The temperature detection module 3 is coupled with a comparison module 311 for outputting a comparison signal, and the comparison module 311 is a comparator; the connection point of the thermistor RT and the first voltage division reference resistor Rn1 is connected to the non-inverting terminal of the comparing module 311. The reference circuit 31 is coupled to the inverting terminal of the comparing module 311, the reference circuit 31 includes a second voltage division reference resistor Rn2 and a third voltage division reference resistor Rn3 connected in series between the output terminals of the voltage stabilizing module 2, a connection point of the second voltage division reference resistor Rn2 and the third voltage division reference resistor Rn3 is connected to the inverting terminal of the comparing module 311, and the third voltage division reference resistor Rn3 is a sliding rheostat.
The output end of the comparison module 311 is coupled with a control module 32 for outputting a control signal, the control module 32 includes a second triode Q2 and an electromagnetic relay KM1, the base of the second triode Q2 is connected to the output end of the comparison module 311, the emitter of the second triode Q2 is connected to the negative electrode of the output end of the power conversion module 1, the collector of the second triode Q2 is connected to the coil of the electromagnetic relay KM1, and the other end of the coil of the electromagnetic relay KM1 is connected with a reminding device 34. The reminding device 34 is a light-emitting diode, and the cathode of the light-emitting diode is connected with the coil of the electromagnetic relay KM 1. A radiator 33 which responds to a control signal to drive the fan to rotate is coupled to the control module 32; the radiator 33 is a heat radiation fan, one end of the radiator 33 is connected to the protection resistor R5, and the other end of the protection resistor R5 is connected to the negative electrode of the output end of the power conversion module 1; the other end of the heat sink 33 is connected to the normally open contact of the electromagnetic relay KM1, and the other end of the normally open contact of the electromagnetic relay KM1 is connected to the positive electrode of the output end of the power conversion module 1.
The working principle is as follows:
the commercial power grid is converted into 15VDC from 220VAC through the power conversion module 1, the conversion efficiency of the switch power supply is high, and the conversion efficiency can reach 75%. The converted voltage is filtered by the filter capacitor C1 to remove a part of the ripple, and then is input to the voltage stabilizing module 2. Because the reference voltage inside the voltage regulator Q3 is 2.5V, the voltage at both ends of the reference voltage is 2.5V, the voltage at the output end of the voltage regulator module 2 can stably output 10V, and the voltage output by the voltage regulator module 2 can be finely adjusted by adjusting the resistance value of the adjusting resistor R2.
Because the triode and the voltage regulator tube can generate heat in the working process, when the accumulated heat exceeds a preset value, the self-recovery fuse F1 is disconnected. Meanwhile, the resistance value of the thermistor RT is increased, the comparison module 311 outputs high level to drive the second diode to be conducted, the electromagnetic relay KM1 is electrified to attract the normally open contact, the reminding device 34 sends out light ray reminding at the moment, and meanwhile, the fan is started to dissipate heat.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.
Claims (8)
1. An isolated high-efficient high accuracy voltage stabilizing circuit which characterized in that: the voltage stabilizing device comprises a power supply conversion module (1) and a voltage stabilizing module (2), wherein the input end of the power supply conversion module (1) is coupled to a city power grid, the output end of the power supply conversion module (1) is coupled to the input end of the voltage stabilizing module (2), and the output end of the voltage stabilizing module (2) is used for outputting voltage stabilizing voltage.
2. The isolated high-efficiency high-precision voltage stabilizing circuit according to claim 1, wherein the power conversion module (1) is an L D01-10B15 type isolated switch power supply.
3. The isolated high-efficiency high-precision voltage stabilizing circuit according to claim 2, wherein: the voltage stabilizing module (2) comprises a first resistor R1, a first triode Q1, a voltage stabilizing source Q3, a reference resistor R3, an adjusting resistor R2 and a voltage dividing resistor R4, wherein the reference resistor R3, the adjusting resistor R2 and the voltage dividing resistor R4 are connected in series and connected with the output end of the power supply conversion module (1), the connection point of the reference resistor R3 and the voltage dividing resistor R4 is connected with the R pole of the voltage stabilizing source Q3, the A pole of the voltage stabilizing source Q3 is connected with the negative pole of the output end of the power supply conversion module (1), and the K pole of the voltage stabilizing source Q3 is connected with the base electrode of the first triode Q1; the emitting electrode of the first triode Q1 is connected with the positive electrode of the output end of the voltage stabilizing module (2), the emitting electrode of the first triode Q1 is connected with the positive electrode of the output end of the power supply converting module (1), and the first resistor R1 is connected between the base electrode and the collector electrode of the first triode Q1 in series.
4. The isolated high-efficiency high-precision voltage stabilizing circuit according to claim 3, wherein: a self-recovery fuse F1 is connected in series between the emitter of the first triode Q1 and the voltage-dividing resistor R4.
5. The isolated high-efficiency high-precision voltage stabilizing circuit according to claim 3, wherein: the adjusting resistor R2 is a slide rheostat.
6. The isolated high-efficiency high-precision voltage stabilizing circuit according to claim 1, wherein: and a filter capacitor C1 is connected in series between the output ends of the power conversion modules (1).
7. The isolated high-efficiency high-precision voltage stabilizing circuit according to claim 6, wherein: a temperature detection module (3) arranged around the first triode Q1 is connected between the filter capacitor C1 and the voltage stabilizing module (2), a comparison module (311) used for outputting a comparison signal is coupled to the temperature detection module (3), a reference circuit (31) is coupled to the inverting end of the comparison module (311), a control module (32) used for outputting a control signal is coupled to the output end of the comparison module (311), and a radiator (33) responding to the control signal to drive the fan to rotate is coupled to the control module (32).
8. The isolated high-efficiency high-precision voltage stabilizing circuit according to claim 7, wherein: the control module (32) is connected with a reminding device (34) in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922496696.2U CN211015190U (en) | 2019-12-31 | 2019-12-31 | Isolated high-efficiency high-precision voltage stabilizing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922496696.2U CN211015190U (en) | 2019-12-31 | 2019-12-31 | Isolated high-efficiency high-precision voltage stabilizing circuit |
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| Publication Number | Publication Date |
|---|---|
| CN211015190U true CN211015190U (en) | 2020-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922496696.2U Active CN211015190U (en) | 2019-12-31 | 2019-12-31 | Isolated high-efficiency high-precision voltage stabilizing circuit |
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| Country | Link |
|---|---|
| CN (1) | CN211015190U (en) |
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- 2019-12-31 CN CN201922496696.2U patent/CN211015190U/en active Active
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