CN204733089U - A kind of power module of speed probe - Google Patents
A kind of power module of speed probe Download PDFInfo
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- CN204733089U CN204733089U CN201520492825.XU CN201520492825U CN204733089U CN 204733089 U CN204733089 U CN 204733089U CN 201520492825 U CN201520492825 U CN 201520492825U CN 204733089 U CN204733089 U CN 204733089U
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- pnp triode
- speed probe
- power module
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Abstract
A power module for speed probe, comprises fast acting fuse, transformer, full bridge rectifier, storage capacitor, thyristor, the first resistance, PNP triode, three terminal regulator, voltage stabilizing didoe, the second resistance, the first filter capacitor, filter inductance and the second filter capacitor.The power module of the speed probe that the utility model provides, can provide stable supply voltage for speed probe.
Description
Technical field
The utility model relates to sensor detecting field, particularly a kind of power module of speed probe.
Background technology
Speed probe the rotating speed of rotating object is converted to the transducer that electricity exports, and belongs to indirect type measurement mechanism, available mechanical, electrically, magnetic, light and the method manufacture such as hybrid.By the difference of signal form, speed probe can be divided into analog and digital two kinds.The former output signal value is the linear function of rotating speed, and the output signal frequency of the latter is directly proportional to rotating speed, or its signal peak interval and rotating speed are inversely proportional to.Speed probe of a great variety, application extremely wide, its reason uses various motor in a large number in automatic control system and instrument and meter for automation, in many instances to low speed (as less than one turn per hour), at a high speed (as hundreds thousand of turns per minute), speed stabilizing (as error be only ten thousand/several) and the accurate measurement of instantaneous velocity have strict requirement.Conventional speed probe has photoelectric type, condenser type, variable reluctance and tachogenerator etc.
No matter be the speed probe of which kind of form, all need tested rotating speed to be converted to the signal of telecommunication, by signal conditioning circuit, the signal of telecommunication is amplified, the process such as shaping.To in Electric signal processing process, each signal conditioning circuit of electric power source pair of module is needed to power, the precision that can affect signal transacting for electrical stability of power module.Therefore, need for speed probe provides a kind of power module of stable power-supplying.
Utility model content
Problem to be solved in the utility model is to provide a kind of power module of speed probe, realizes the stable power-supplying to speed probe.
For solving the problem, the utility model provides a kind of power module of speed probe, comprises fast acting fuse, transformer, full bridge rectifier, storage capacitor, thyristor, the first resistance, PNP triode, three terminal regulator, voltage stabilizing didoe, the second resistance, the first filter capacitor, filter inductance and the second filter capacitor, the primary coil of described fast acting fuse and described transformer is connected in ac circuit, the parallel connection of secondary windings of described transformer is in the input of described full bridge rectifier, the positive output end of described full bridge rectifier connects one end of described storage capacitor, the positive pole of described thyristor, one end of described first resistance and the emitter of described PNP triode, the negative output terminal of described full bridge rectifier connects the other end of described storage capacitor, the negative pole of described thyristor, the reference edge of described three terminal regulator, one end of described second resistance, one end of described first filter capacitor and one end of described second filter capacitor ground connection, the base stage of described PNP triode connects the other end of described first resistance and the input of described three terminal regulator, and the collector electrode of described PNP triode connects the output of described three terminal regulator, the negative pole of described voltage stabilizing didoe, the other end of described first filter capacitor and one end of described filter inductance, the positive pole of described voltage stabilizing didoe connects the other end of described second resistance and the control pole of described thyristor, and the other end of described filter inductance connects the other end of described second filter capacitor.
The power module of the speed probe that the utility model provides, by described transformer, described full bridge rectifier and described storage capacitor, 220V alternating voltage is transformed to direct current, adopt described three terminal regulator and described PNP triode parallel voltage-stabilizing, while stable output direct voltage, output current can also be increased.Further, described thyristor, described voltage stabilizing didoe, described second resistance and described fast acting fuse form overvoltage crowbar, can prevent some reason from causing the output overvoltage of described three terminal regulator and damaging speed probe.Described first filter capacitor, described filter inductance and described second filter capacitor form filter circuit, the ripple in filtering output voltage, improve the stability of output voltage further.
Optionally, the power module of described speed probe also comprises the first counnter attack diode, and the positive pole of described first counnter attack diode connects the collector electrode of described PNP triode, and the negative pole of described first counnter attack diode connects the emitter of described PNP triode.By arranging described first counnter attack diode, when input short circuit or output overvoltage, described first counnter attack diode can discharge the electric charge stored in described first filter capacitor, can prevent the electric charge stored in described first filter capacitor from damaging described PNP triode because having little time release.
Optionally, the power module of described speed probe also comprises the second counnter attack diode, and the positive pole of described second counnter attack diode connects the collector electrode of described PNP triode, and the negative pole of described second counnter attack diode connects the base stage of described PNP triode.By arranging described second counnter attack diode, when input short circuit or output overvoltage, described second counnter attack diode can discharge the electric charge stored in described first filter capacitor, can prevent the electric charge stored in described first filter capacitor from damaging described three terminal regulator because having little time release.
Optionally, described three terminal regulator is 7805 integrated circuits.
Optionally, the power module of described speed probe also comprises the 3rd resistance and light-emitting diode; One end of described 3rd resistance connects the other end of described filter inductance, and the other end of described 3rd resistance connects the positive pole of described light-emitting diode, the minus earth of described light-emitting diode.By arranging described 3rd resistance and described light-emitting diode, when output voltage is normal, described light-emitting diode carries out luminescence instruction.
Compared with prior art, the utility model has the following advantages:
The power module of the speed probe that the utility model provides, by described transformer, described full bridge rectifier and described storage capacitor, 220V alternating voltage is transformed to direct current, adopt described three terminal regulator and described PNP triode parallel voltage-stabilizing, can not only the direct voltage of stable output, can also output current be increased.Further, described thyristor, described voltage stabilizing didoe, described second resistance and described fast acting fuse form overvoltage crowbar, can prevent some reason from causing the output overvoltage of described three terminal regulator and damaging speed probe.Described first filter capacitor, described filter inductance and described second filter capacitor form filter circuit, the Wen Bo in filtering output voltage, improve the stability of output voltage further.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the power module of the speed probe of a kind of embodiment of the utility model;
Fig. 2 is the circuit diagram of the power module of the speed probe of the another kind of embodiment of the utility model.
Embodiment
Below in conjunction with embodiment and accompanying drawing, to the detailed description further of the utility model do, but execution mode of the present utility model is not limited thereto.
Fig. 1 is the circuit diagram of the power module of the speed probe of a kind of embodiment of the utility model.The power module of described speed probe comprises fast acting fuse F1, transformer T1, full bridge rectifier 11, storage capacitor C1, thyristor D1, the first resistance R1, PNP triode Q1, three terminal regulator 12, voltage stabilizing didoe D2, the second resistance R2, the first filter capacitor C2, filter inductance L1 and the second filter capacitor C3.
Particularly, the primary coil of described fast acting fuse F1 and described transformer T1 is connected in ac circuit, the parallel connection of secondary windings of described transformer T1 is in the input of described full bridge rectifier 11, the positive output end of described full bridge rectifier 11 connects one end of described storage capacitor C1, the positive pole of described thyristor D1, described one end of first resistance R1 and the emitter of described PNP triode Q1, the negative output terminal of described full bridge rectifier 11 connects the other end of described storage capacitor C1, the negative pole of described thyristor D1, the reference edge of described three terminal regulator 12, one end of described second resistance R2, one end of described first filter capacitor C2 and one end of described second filter capacitor C3 ground connection.
The base stage of described PNP triode Q1 connects the described other end of the first resistance R1 and the input of described three terminal regulator 12, the collector electrode of described PNP triode Q1 connects the output of described three terminal regulator 12, the negative pole of described voltage stabilizing didoe D2, the other end of described first filter capacitor C2 and one end of described filter inductance L1, the positive pole of described voltage stabilizing didoe D2 connects the other end of described second resistance R2 and the control pole of described thyristor D1, and the other end of described filter inductance L1 connects the other end of described second filter capacitor C3.
Described fast acting fuse F1 is protection device, can quick fuse when the electric current flow through exceedes the threshold current that it can bear, and carries out insulation blocking to subsequent conditioning circuit.The 220V alternating voltage Vin of described transformer T1 to input carries out step-down, and the alternating voltage after step-down process charges to described storage capacitor C1 after the rectification of described full bridge rectifier 11, and alternating voltage is converted to direct voltage.Direct voltage inputs to described three terminal regulator 12 after described first resistance R1, and described three terminal regulator 12 carries out voltage stabilizing process.Described three terminal regulator 12 the supply power voltage size needed for speed probe can choose concrete model, and in the present embodiment, described three terminal regulator 12 is 7805 integrated circuits, is stabilized in 5V by output voltage Vout.Described PNP triode Q1 is in parallel with described three terminal regulator 12, is suitable for amplifying output current.Described first filter capacitor C2, described second filter capacitor C3 and described filter inductance L1 form filter circuit, effectively can reduce the ripple of output voltage Vout, improve the stability of output voltage Vout further.
Usually; described three terminal regulator 12 inside is provided with overheated and place of safety protective circuit; but the situation of instantaneous overvoltage still may be there is in the output of described three terminal regulator 12, such as from power module outside transient high voltage, described three terminal regulator 12 damages or described PNP triode Q1 damages.For guaranteeing the safety of speed probe, the power module of the present embodiment adopts described fast acting fuse F1, described thyristor D1, described voltage stabilizing didoe D2 and described second voltage R2 to form overvoltage crowbar.When normally working, described voltage stabilizing didoe D2 and described thyristor D1 is in cut-off state; When there is overvoltage phenomenon in the output of described three terminal regulator 12; described voltage stabilizing didoe D2 conducting; then described thyristor D1 conducting is triggered; the i.e. secondary short circuited of described transformer T1; the elementary of described transformer T1 occurs that big current makes described fast acting fuse F1 fuse, thus protection speed probe.
In the present embodiment, the power module of described speed probe also comprises the first counnter attack diode D3, the positive pole of described first counnter attack diode D3 connects the collector electrode of described PNP triode Q1, and the negative pole of described first counnter attack diode D3 connects the emitter of described PNP triode Q1.When input short circuit or output overvoltage, the electric charge stored in described first filter capacitor C2 has little time release, may damage described PNP triode Q1.By arranging described first counnter attack diode D3, the electric charge stored in described first filter capacitor C2 discharges by described first counnter attack diode D3, thus protects described PNP triode Q1, improves the reliability of power module.
Further, the power module of described speed probe also comprises the second counnter attack diode D4, the positive pole of described second counnter attack diode D4 connects the collector electrode of described PNP triode Q1, the negative pole of described second counnter attack diode D4 connects the base stage of described PNP triode Q1, namely between the described second counnter attack diode D4 input that is connected in parallel on described three sections of pressurizers 12 and output.When input short circuit or output overvoltage, the electric charge stored in described first filter capacitor C2 has little time release, may damage described three sections of pressurizers 12.By arranging described second counnter attack diode D4, the electric charge stored in described first filter capacitor C2 discharges by described second counnter attack diode D4, thus protects described three sections of pressurizers 12, improves the reliability of power module.
Fig. 2 is the circuit diagram of the power module of the speed probe of the another kind of embodiment of the utility model.Compared with the embodiment that Fig. 1 is corresponding, the power module of the present embodiment also comprises the 3rd resistance R3 and light-emitting diode D5.One end of described 3rd resistance R3 connects the other end of described filter inductance L1, and the other end of described 3rd resistance R3 connects the positive pole of described light-emitting diode D5, the minus earth of described light-emitting diode D5.By arranging described 3rd resistance R3 and described light-emitting diode D5, when output voltage Vout is normal, described light-emitting diode D5 carries out luminescence instruction.
The above; it is only preferred embodiment of the present utility model; not do any pro forma restriction to the utility model, every any simple modification, equivalent variations done above embodiment according to technical spirit of the present utility model, all falls within protection range of the present utility model.
Claims (5)
1. the power module of a speed probe, it is characterized in that, comprise fast acting fuse, transformer, full bridge rectifier, storage capacitor, thyristor, the first resistance, PNP triode, three terminal regulator, voltage stabilizing didoe, the second resistance, the first filter capacitor, filter inductance and the second filter capacitor;
The primary coil of described fast acting fuse and described transformer is connected in ac circuit, the parallel connection of secondary windings of described transformer is in the input of described full bridge rectifier, the positive output end of described full bridge rectifier connects one end of described storage capacitor, the positive pole of described thyristor, one end of described first resistance and the emitter of described PNP triode, the negative output terminal of described full bridge rectifier connects the other end of described storage capacitor, the negative pole of described thyristor, the reference edge of described three terminal regulator, one end of described second resistance, one end of described first filter capacitor and one end of described second filter capacitor ground connection,
The base stage of described PNP triode connects the other end of described first resistance and the input of described three terminal regulator, and the collector electrode of described PNP triode connects the output of described three terminal regulator, the negative pole of described voltage stabilizing didoe, the other end of described first filter capacitor and one end of described filter inductance;
The positive pole of described voltage stabilizing didoe connects the other end of described second resistance and the control pole of described thyristor, and the other end of described filter inductance connects the other end of described second filter capacitor.
2. the power module of speed probe according to claim 1, it is characterized in that, also comprise the first counnter attack diode, the positive pole of described first counnter attack diode connects the collector electrode of described PNP triode, and the negative pole of described first counnter attack diode connects the emitter of described PNP triode.
3. the power module of speed probe according to claim 1, it is characterized in that, also comprise the second counnter attack diode, the positive pole of described second counnter attack diode connects the collector electrode of described PNP triode, and the negative pole of described second counnter attack diode connects the base stage of described PNP triode.
4. the power module of speed probe according to claim 1, is characterized in that, described three terminal regulator is 7805 integrated circuits.
5. the power module of speed probe according to claim 1, is characterized in that, also comprises the 3rd resistance and light-emitting diode;
One end of described 3rd resistance connects the other end of described filter inductance, and the other end of described 3rd resistance connects the positive pole of described light-emitting diode, the minus earth of described light-emitting diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520492825.XU CN204733089U (en) | 2015-07-10 | 2015-07-10 | A kind of power module of speed probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520492825.XU CN204733089U (en) | 2015-07-10 | 2015-07-10 | A kind of power module of speed probe |
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| Publication Number | Publication Date |
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| CN204733089U true CN204733089U (en) | 2015-10-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520492825.XU Expired - Fee Related CN204733089U (en) | 2015-07-10 | 2015-07-10 | A kind of power module of speed probe |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104967343A (en) * | 2015-07-10 | 2015-10-07 | 四川奇胜科技有限公司 | Power supply module for rotation speed sensor |
| CN108304059A (en) * | 2018-02-26 | 2018-07-20 | 北京环境特性研究所 | A kind of computer abnormal power-down auto shutdown system and method |
| CN109982492A (en) * | 2019-04-09 | 2019-07-05 | 广西俊锦科技有限公司 | Intelligent light control system |
-
2015
- 2015-07-10 CN CN201520492825.XU patent/CN204733089U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104967343A (en) * | 2015-07-10 | 2015-10-07 | 四川奇胜科技有限公司 | Power supply module for rotation speed sensor |
| CN108304059A (en) * | 2018-02-26 | 2018-07-20 | 北京环境特性研究所 | A kind of computer abnormal power-down auto shutdown system and method |
| CN108304059B (en) * | 2018-02-26 | 2020-02-07 | 北京环境特性研究所 | Automatic shutdown system and method for abnormal power failure of computer |
| CN109982492A (en) * | 2019-04-09 | 2019-07-05 | 广西俊锦科技有限公司 | Intelligent light control system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151028 Termination date: 20180710 |