CN2523107Y - Voltage sampling device of DC high-tension power source - Google Patents
Voltage sampling device of DC high-tension power source Download PDFInfo
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- CN2523107Y CN2523107Y CN 01258174 CN01258174U CN2523107Y CN 2523107 Y CN2523107 Y CN 2523107Y CN 01258174 CN01258174 CN 01258174 CN 01258174 U CN01258174 U CN 01258174U CN 2523107 Y CN2523107 Y CN 2523107Y
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- voltage
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- power supply
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- copped wave
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Abstract
The utility model relates to a voltage sampling device of a direct current and high voltage power supply used for a frequency converting air conditioner controller. The device uses a chopper to convert the direct current and high voltage power supply into a pulse wave shape with same amplitude which is then converted into a low voltage pulse with proper amplitude through a pulse isolation transformer or a switch power transformer. The voltage amplitude of the low voltage pulse is directly propositional to the voltage of the direct current and high voltage, then the low voltage pulse is output through a detection circuit and a power level converting circuit to a voltage sampling port of a micro program controller MCU, a separated sampling is realized. After the utility model is used in the frequency converting air conditioning controller, the controller can require corresponding adjustments according to changes of direct current bus bar voltages, which can ensure the frequency converting air conditioner to work safely and stably in a wider voltage range.
Description
Technical field
The utility model relates to the supply voltage self adaptation regulation technology of variable frequency air-conditioner controller, is specifically related to a kind of device that carries out voltage sampling on DC high-voltage power supply.
Background technology
Having the technology of carrying out voltage sampling on DC high-voltage power supply now comprises following several:
(1), directly carry out the electric resistance partial pressure sampling, its advantage is that circuit is simple and reliable, and shortcoming is can not isolate between forceful electric power and the light current, and is not too safe in the application;
(2), adopt the effect of Hall element after conversion, to carry out strong and weak electricity to isolate sampling, advantage is the precision height, safety is isolated, shortcoming is the cost height, circuit is complicated;
(3), adopt optocoupler to carry out isolated variable, advantage is safe and reliable, shortcoming is easily to cause drift, and consistency is relatively poor.
Summary of the invention
The technical problems to be solved in the utility model is, at the above-mentioned defective of prior art, provides a kind of and can isolate strong and weak electricity safety, cost is low, precision is high and the device that carries out voltage sampling on DC high-voltage power supply that is easy to realize.
The technical solution of the utility model is, construct a kind of voltage sampling device that is used for the DC high-voltage power supply of variable frequency air-conditioner controller, comprise the DC high-voltage power supply input, the sampling voltage output that is connected with microprogram control unit MCU, it is characterized in that, also comprise to the input DC high-voltage power supply carry out copped wave chopper circuit, to the power supply after the copped wave isolate isolation transforming circuit, the detecting circuit that is connected with described isolation transforming circuit of transformation and be connected described detecting circuit and described sampling voltage output between level shifting circuit.
In device described in the utility model, described chopper circuit becomes the high direct voltage of input into constant amplitude pulse voltage, can adopt copped wave pipe, inversion bridge circuit, switching power source control circuit or is realized by the synchronous chopper circuit of MCU control.
In device described in the utility model, described isolation transforming circuit can be pulse isolation transformer or switching mode power supply transformer.
In device described in the utility model, can adopt two utmost point detecting circuits or synchro detection circuit to carry out detection.
It is simple to the utlity model has circuit structure, modern design, and circuit form is various, and cost is low, and sampling precision is higher, and strong and weak electric energy safe is isolated, and makes things convenient for the advantages such as test, adjustment and maintenance of product.
The utility model is described in further detail below in conjunction with drawings and Examples.
Description of drawings
Fig. 1 is the circuit diagram when adopting the copped wave pipe among the utility model embodiment one;
Fig. 2 is the circuit diagram when adopting the inverter bridge circuit among the utility model embodiment two;
Fig. 3 is the circuit diagram when adopting switching power source control circuit among the utility model embodiment three;
Fig. 4 is the circuit diagram when adopting the synchronous chopper circuit of MCU control among the utility model embodiment four.
Embodiment
The utility model provides a kind of voltage sampling device that is used for the DC high-voltage power supply of variable frequency air-conditioner controller, can convert the DC high-voltage power supply of input to voltage sampling port that dc low-voltage outputs to microprogram control unit MCU.Chopper circuit wherein can adopt existing chopper circuit in the variable frequency air-conditioner controller, resembles the inversion bridge circuit, Switching Power Supply waits and realizes, can also adopt MCU port output ON/OFF signal to realize through light-coupled isolation rear drive chopper circuit.
As shown in Figure 1, among the utility model embodiment one, by the bus high direct voltage of rectification circuit 1 output through copped wave pipe V copped wave, again after pulse isolating transformer T step-down, be input to by diode D, capacitor C 1, and resistance R 2, envelope detection circuit that R3 constitutes carry out envelope detection, R2 wherein, R3 constitute the interface level change-over circuit again, and the voltage after the dividing potential drop sampling is outputed to the voltage sampling port of MCU by the R3 two ends.Wherein C2 is a filter capacitor, the base stage input pulse control signal of copped wave pipe V.
Be illustrated in figure 2 as the circuit diagram when adopting the inversion bridge circuit to carry out copped wave among the utility model embodiment two.Wherein between the both positive and negative polarity that the copped wave pipe V1 that is connected of control of base stage and inverter and drive circuit 2 and V2 are serially connected in DC high-voltage power supply, the emitter of copped wave pipe V1 and V2 is connected respectively to the input of pulse isolation transformer T, after pulse transformer T conversion, the detecting circuit of forming via D, R2, R3, C1 carries out envelope detection, delivers to the sampling port of MCU again after R2, R3 coupling.
Be illustrated in figure 3 as the circuit diagram when adopting switching power source control circuit to carry out copped wave among the utility model embodiment three.Wherein switching power source control circuit becomes DC bus-bar voltage the pulse voltage of constant amplitude, the envelope detection circuit of forming via D, R2, R3, C1 again after pulse transformer T safety is isolated carries out detection, send the sampling port of MCU again after matching network R2, R3 coupling.
Circuit diagram when being illustrated in figure 4 as the synchronous chopper circuit of the control of MCU among the utility model embodiment four.Wherein the emitter of copped wave pipe V connects the negative pole of power supply, and base stage connects the collector electrode of optocoupler E and connects positive source through resistance R 4; The switching signal of MCU output is connected to the diode cathode of optocoupler E, and the emitter of optocoupler E connects power cathode.MCU output ON/OFF signal is sent to optocoupler E, and optocoupler E drives copped wave pipe V output chopping voltage, after pulse transformer T isolates transformation, carry out envelope detection by detecting circuit D, R2, R3, C1 after, after R2, R3 coupling, send the sampling port of MCU again.
In the various embodiments described above, can also replace pulse isolation transformer T with switching mode power supply transformer.
In the circuit of embodiment one to four, envelope detection circuit is a key problem in technology, and too little then being subject to of constant disturbed during its detection, the time constant is oversize then easily causes the sampling distortion, constant was advisable with about 1 second in the time of generally speaking.
After the utility model was applied to variable frequency air-conditioner controller, controller can be made corresponding adjustment according to the variation of DC bus-bar voltage, thereby made convertible frequency air-conditioner to work with security and stability in the voltage range of broad.As can be seen, voltage sampling device of the present utility model can guarantee the isolation fully between sample circuit and the dc high-voltage circuit from the circuit of embodiment one to four, and sampling precision is higher, and cost is lower, is easy to realize.
Claims (7)
1, a kind of voltage sampling device that is used for the DC high-voltage power supply of variable frequency air-conditioner controller, comprise the DC high-voltage power supply input, the sampling voltage output that is connected with microprogram control unit MCU, it is characterized in that, also comprise to the input DC high-voltage power supply carry out copped wave chopper circuit, to the power supply after the copped wave isolate isolation transforming circuit, the detecting circuit that is connected with described isolation transforming circuit of transformation and be connected described detecting circuit and described sampling voltage output between level shifting circuit.
2, device according to claim 1, it is characterized in that, described chopper circuit adopts copped wave pipe V that the high direct voltage of input is become constant amplitude pulse voltage, wherein the collector electrode of copped wave pipe V connects an input of isolating transforming circuit, emitter connects the negative pole of DC high-voltage power supply, and base stage connects pulse control signal.
3, device according to claim 1, it is characterized in that, described chopper circuit adopts the inverter bridge circuit that the high direct voltage of input is become constant amplitude pulse voltage, wherein between the both positive and negative polarity that the copped wave pipe V1 that is connected of control of base stage and inverter and drive circuit and V2 are serially connected in DC high-voltage power supply, the emitter of copped wave pipe V1 and V2 is connected respectively to the input of isolation transforming circuit.
4, device according to claim 1 is characterized in that, described chopper circuit adopts switching power source control circuit that the high direct voltage of input is become constant amplitude pulse voltage.
5, device according to claim 1, it is characterized in that, described chopper circuit adopts the synchronous chopper circuit by MCU control that the high direct voltage of importing is become constant amplitude pulse voltage, wherein the collector electrode of copped wave pipe V connects an input of isolating transforming circuit, emitter connects the negative pole of power supply, and base stage connects the collector electrode of optocoupler E and connects positive source through resistance R 4; The switching signal of MCU output is connected to the diode cathode of optocoupler E, and the emitter of optocoupler E connects power cathode.
According to each described device among the claim 1-5, it is characterized in that 6, described isolation transforming circuit can be pulse isolation transformer or switching mode power supply transformer.
7, according to each described device among the claim 1-5, it is characterized in that, described detecting circuit is the diode detection circuit, comprise diode D, resistance R 2 and R3 between the output both positive and negative polarity that is serially connected in described isolation transforming circuit successively, also comprise the capacitor C 1 between the output negative pole that is connected on diode D negative pole and isolates transforming circuit; Described resistance R 2 and R3 constitute level shifting circuit simultaneously, and the two ends of R3 are as the sampling voltage output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01258174 CN2523107Y (en) | 2001-11-19 | 2001-11-19 | Voltage sampling device of DC high-tension power source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01258174 CN2523107Y (en) | 2001-11-19 | 2001-11-19 | Voltage sampling device of DC high-tension power source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2523107Y true CN2523107Y (en) | 2002-11-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01258174 Expired - Fee Related CN2523107Y (en) | 2001-11-19 | 2001-11-19 | Voltage sampling device of DC high-tension power source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2523107Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100449927C (en) * | 2003-05-14 | 2009-01-07 | 三星电子株式会社 | High voltage power supply apparatus and method of correcting current output from the apparatus |
| CN102937665A (en) * | 2012-11-08 | 2013-02-20 | 温州大学 | Modulation direct-current voltage transformer |
| CN113281640A (en) * | 2021-07-20 | 2021-08-20 | 常州今创电工有限公司 | Self-diagnosis system and method for direct current chopping acquisition for rail transit |
-
2001
- 2001-11-19 CN CN 01258174 patent/CN2523107Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100449927C (en) * | 2003-05-14 | 2009-01-07 | 三星电子株式会社 | High voltage power supply apparatus and method of correcting current output from the apparatus |
| CN102937665A (en) * | 2012-11-08 | 2013-02-20 | 温州大学 | Modulation direct-current voltage transformer |
| CN113281640A (en) * | 2021-07-20 | 2021-08-20 | 常州今创电工有限公司 | Self-diagnosis system and method for direct current chopping acquisition for rail transit |
| CN113281640B (en) * | 2021-07-20 | 2021-11-02 | 常州今创电工有限公司 | Self-diagnosis system and method for direct current chopping acquisition for rail transit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |