CN104635037A - High-precision detection circuit for full-bridge rectification load power and alternating current power - Google Patents
High-precision detection circuit for full-bridge rectification load power and alternating current power Download PDFInfo
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- CN104635037A CN104635037A CN201310550428.9A CN201310550428A CN104635037A CN 104635037 A CN104635037 A CN 104635037A CN 201310550428 A CN201310550428 A CN 201310550428A CN 104635037 A CN104635037 A CN 104635037A
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Abstract
The invention relates to a high-precision detection circuit of a full-bridge rectification load power and an alternating current power. The high-precision detection circuit at least comprises a rectification filter circuit and an adjusting circuit, an input terminal of the rectification filter circuit is an alternating current input port, output terminals of the rectification filter circuit and the adjusting circuit are direct current output terminals, an alternating current input terminal interface is arranged between the alternating current input port and an alternating current power supply, a direct current output terminal interface is arranged between the direct current output terminals and a load RL, the direct current output terminal interface and the alternating current input terminal interface are electrically connected with a detection circuit, the direct current output terminal interface is used for sensing current and voltage signals of the input terminal and providing the sensed current and voltage signals for the detection circuit to be processed, and the alternating current input terminal interface is used for sensing current and voltage signals of the output terminal and providing the sensed current and voltage signals to the detection circuit to be processed. According to the method, the phase difference between the alternating current voltage and current can be provided, and the active power, the apparent power, and the ratio of the active power to the apparent power can also be provided.
Description
Technical field
The present invention relates to a kind of power to detect, the particularly high precision test circuit of a kind of full-bridge rectification bearing power and AC power.
Background technology
After exchanging 220v rectification, be directly carried in load by regulating circuit (constant current or constant voltage), there will be problem by the power factor (PF) detection of existing instrument to power supply.
power factor(English: Power Factor, abbreviation:
pF) also known as
power factor, be distinctive physical quantity in AC electric power systems, be the ratio of the active power that consumes of a load and its applied power, its numerical value is between 0 to 1.
Active power represents the ability that a circuit does work at special time, and applied power is the product of voltage and current effective value.The applied power of pure resistor load equals active power, and its power factor is 1.If the linear load that load is made up of inductance, electric capacity and resistance, energy back and forth may flow at load end and power end, and active power is declined.
Both power factor and electrical efficiency (English: Electrical efficiency) they are different concepts, and the efficiency of an equipment is the ratio of output power relative to power input, and
power factordifferent.After the one plant capacity factor promotes, the efficiency of equipment itself not necessarily can promote thereupon.But after power factor promotes, applied power and input current can reduce, and therefore the efficiency of electric power system can promote.
In alternating circuit, the cosine of the phase differential (Φ) between voltage and electric current is called power factor, represents with symbol cos Φ, and in online sexual intercourse current circuit, numerically power factor is the ratio of active power and applied power, i.e. cos Φ=P/S.Existing
power factor detects and all provides based on this principle.This detection is only to interchangephase differential between voltage and electric current detects, and does not need to export real power to detect, and therefore to nonlinear load, the conclusion obtained is devious.
Summary of the invention
The object of this invention is to provide a kind of phase differential that can provide between alternating voltage and electric current, active power and its applied power and the full-bridge rectification bearing power of its ratio and the high precision test circuit of AC power can be provided again.
The object of the present invention is achieved like this, the high precision test circuit of a kind of full-bridge rectification bearing power and AC power, it is characterized in that: at least comprise current rectifying and wave filtering circuit and regulate electricity, the input end of rectifying and wave-filtering electricity is ac input end mouth, the output terminal of rectifying and wave-filtering electricity and regulating circuit is DC output end, ac input end interface is had between ac input end mouth and AC power, DC output end interface is had between DC output end and load RL, DC output end interface and ac input end interface are electrically connected with testing circuit, DC output end interface is used for electric current and the voltage signal of sense input, the electric current of sensing and voltage signal are supplied to testing circuit process, ac input end interface is used for electric current and the voltage signal of sense outputs, and the electric current of sensing and voltage signal are supplied to testing circuit process, provide active power, applied power by testing circuit simultaneously, provide the ratio of active power and applied power.
Described testing circuit comprises display, button, processor, processor is electrically connected with display and button, processor is with multi-channel a/d converter port, multi-channel a/d converter port is electrically connected with the sensor output of DC output end interface respectively, the sensor of DC output end interface has current sensing unit and voltage sensor unit, and the electric current of sensing and voltage signal are supplied to the processor process of testing circuit by current sensing unit and voltage sensor unit; Multi-channel a/d converter port is electrically connected with the sensor output of ac input end interface respectively, the sensor of ac input end interface has current sensing unit and voltage sensor unit, the electric current of sensing and voltage signal are supplied to the processor process of testing circuit by current sensing unit and voltage sensor unit, and the result of processor process is presented at display.
Current sensing unit in described ac input end interface is serially connected with resistance R and light-emitting component GFS at input end, and light-emitting component GFS sends optical registration photoelectric cell GJS, and photoelectric cell GJS output voltage is electrically connected with A/D converter port; Voltage sensor unit is the mutual inductor L be socketed in ac circuit; The output terminal of mutual inductor L is electrically connected with A/D converter port.
Current sensing unit in described ac input end interface is that voltage transformer (VT) T one end is electrically connected with alternating current 220V, and voltage transformer (VT) T output terminal is electrically connected with A/D converter port at the voltage transformer (VT) T of input end serial connection; Voltage sensor unit is the mutual inductor L be socketed in ac circuit; The output terminal of mutual inductor L is electrically connected with A/D converter port.
Current sensing unit in described DC output end interface is in load circuit, be connected in series light emitting diode D, the light emission direction of light emitting diode D has photelectric receiver G, and the voltage received by photelectric receiver G or current value obtain average anode current; Voltage sensor unit in DC output end interface carries out dividing potential drop by resistance R1 and R2, and the voltage on R2 exports and provides DC output end voltage, and in order to not affect the impact of dividing potential drop on voltage detecting, the voltage on R2 is isolated by voltage follower.
Current sensing unit in described DC output end interface is series resistor R0 in load circuit, and obtain voltage by resistance R0, resistance R0 is measuring resistance, weighs and obtains average anode current; Voltage sensor unit in DC output end interface carries out dividing potential drop by resistance R1 and R2, and the voltage on R2 exports and provides DC output end voltage, and in order to not affect the impact of dividing potential drop on voltage detecting, the voltage on R2 is isolated by voltage follower.
Described ac input end interface and DC output end interface have interface, by conductor terminal, ac input end interface and DC output end interface signal are incorporated into testing circuit input input port, be electrically connected with processor, sampled by processor, process, obtain alternating voltage, alternating current, DC voltage, DC current, alternating voltage and electric current adopt integral measurement, obtain average power.
Advantage of the present invention is: between ac input end mouth and AC power, have ac input end to connect, DC output end interface is had between DC output end and load RL, DC output end interface and ac input end interface are electrically connected with testing circuit, DC output end interface is used for electric current and the voltage signal of sense input, and the electric current of sensing and voltage signal are supplied to testing circuit process; Ac input end interface is used for electric current and the voltage signal of sense outputs, and the electric current of sensing and voltage signal are supplied to testing circuit process; Provide active power, applied power by testing circuit simultaneously, provide the ratio of active power and applied power.Sampled by processor, process, obtain alternating voltage, alternating current, DC voltage, DC current, alternating voltage and electric current adopt integral measurement, obtain average power.
Accompanying drawing explanation
Below in conjunction with embodiment accompanying drawing, the invention will be further described:
Fig. 1 is embodiment of the present invention circuit theory diagrams;
Fig. 2 is testing circuit schematic diagram;
Fig. 3 is ac input end interface-embodiment 1 circuit theory diagrams;
Fig. 4 is ac input end interface-embodiment 2 circuit theory diagrams;
Fig. 5 is DC output end interface-embodiment 1 circuit theory diagrams;
Fig. 6 is DC output end interface-embodiment 2 circuit theory diagrams.
In figure, 1, ac input end mouth; 2, ac input end interface; 3, display; 4, button; 5, testing circuit; 6, DC output end interface; 7, DC output end; 8, regulating circuit; 9, current rectifying and wave filtering circuit; 10, processor.
Embodiment
Embodiment 1
As shown in Figure 1, the high precision test circuit of a kind of full-bridge rectification bearing power and AC power, it is characterized in that: at least comprise current rectifying and wave filtering circuit 9 and regulating circuit 8, the input end of current rectifying and wave filtering circuit 9 is ac input end mouths 1, the output terminal of current rectifying and wave filtering circuit 9 and regulating circuit 8 is DC output ends 7, ac input end interface 2 is had between ac input end mouth 1 and AC power, DC output end interface 6 is had between DC output end 7 and load RL, DC output end interface 6 and ac input end interface 2 are electrically connected with testing circuit 5, DC output end interface 6 is for the electric current of sense input and voltage signal, the electric current of sensing and voltage signal are supplied to testing circuit 5 process, the electric current of sensing and voltage signal, for the electric current of sense outputs and voltage signal, are supplied to testing circuit 5 and process by ac input end interface 2, provide active power, applied power by testing circuit 5 simultaneously, provide the ratio of active power and applied power.
As shown in Figure 2, testing circuit 5 comprises display 3, button 4, processor 10, processor 10 is electrically connected with display 3 and button 4, processor 10 is with multi-channel a/d converter port, multi-channel a/d converter port is electrically connected with the sensor output of DC output end interface 6 respectively, the sensor of DC output end interface 6 has current sensing unit 601 and voltage sensor unit 602, and the processor 10 that the electric current of sensing and voltage signal are supplied to testing circuit 5 by current sensing unit 601 and voltage sensor unit 602 processes; Multi-channel a/d converter port is electrically connected with the sensor output of ac input end interface 2 respectively, the sensor of ac input end interface 2 has current sensing unit 201 and voltage sensor unit 202, the processor 10 that the electric current of sensing and voltage signal are supplied to testing circuit 5 by current sensing unit 201 and voltage sensor unit 202 processes, and the result that processor 10 processes is presented at display 3.
As shown in Figure 3, current sensing unit 601 in ac input end interface 2 is serially connected with resistance R and the nonpolarity light source of light-emitting component GFS(at input end), light-emitting component GFS(is nonpolarity light source) send optical registration photoelectric cell GJS, photoelectric cell GJS output voltage is electrically connected with A/D converter port.Voltage sensor unit 602 is the mutual inductor L be socketed in ac circuit.The output terminal of mutual inductor L is electrically connected with A/D converter port.
As shown in Figure 5, current sensing unit 201 in DC output end interface 6 is in load circuit, be connected in series light emitting diode D, the light emission direction of light emitting diode D has photelectric receiver G, the voltage received by photelectric receiver G or current value obtain average anode current.Voltage sensor unit 202 in DC output end interface 6 carries out dividing potential drop by resistance R1 and R2, voltage on R2 exports and provides DC output end voltage, in order to not affect the impact (mainly input impedance on the impact of A/D input end) of dividing potential drop on voltage detecting, the voltage on R2 is isolated by voltage follower.
Embodiment 2
As different from Example 1: as shown in Figure 4, current sensing unit 601 in ac input end interface 2 is the voltage transformer (VT) T in input end serial connection, voltage transformer (VT) T one end is electrically connected with alternating current 220V, and voltage transformer (VT) T output terminal is electrically connected with A/D converter port.Voltage sensor unit 602 is the mutual inductor L be socketed in ac circuit.The output terminal of mutual inductor L is electrically connected with A/D converter port.
As shown in Figure 6, the current sensing unit 201 in DC output end interface 6 is series resistor R0 in load circuit, and obtain voltage by resistance R0, resistance R0 is measuring resistance, weighs and obtains average anode current.Identical with Fig. 5, voltage sensor unit 202 in DC output end interface 6 carries out dividing potential drop by resistance R1 and R2, voltage on R2 exports and provides DC output end voltage, in order to not affect the impact (mainly input impedance on the impact of A/D input end) of dividing potential drop on voltage detecting, the voltage on R2 is isolated by voltage follower.
Ac input end interface 2 and DC output end interface 6 have interface, by conductor terminal, ac input end interface 2 and DC output end interface 6 signal are incorporated into testing circuit 5 input input port, be electrically connected with processor 10, sampled by processor 10, processed, obtain alternating voltage, alternating current, DC voltage, DC current, alternating voltage and electric current adopt integral measurement, obtain average power.
Claims (7)
1. the high precision test circuit of a full-bridge rectification bearing power and AC power, it is characterized in that: at least comprise current rectifying and wave filtering circuit and regulate electricity, the input end of rectifying and wave-filtering electricity is ac input end mouth, the output terminal of rectifying and wave-filtering electricity and regulating circuit is DC output end, ac input end interface is had between ac input end mouth and AC power, DC output end interface is had between DC output end and load RL, DC output end interface and ac input end interface are electrically connected with testing circuit, DC output end interface is used for electric current and the voltage signal of sense input, the electric current of sensing and voltage signal are supplied to testing circuit process, ac input end interface is used for electric current and the voltage signal of sense outputs, and the electric current of sensing and voltage signal are supplied to testing circuit process, provide active power, applied power by testing circuit simultaneously, provide the ratio of active power and applied power.
2. the high precision test circuit of a kind of full-bridge rectification bearing power according to claim 1 and AC power, it is characterized in that: described testing circuit comprises display, button, processor, processor is electrically connected with display and button, processor is with multi-channel a/d converter port, multi-channel a/d converter port is electrically connected with the sensor output of DC output end interface respectively, the sensor of DC output end interface has current sensing unit and voltage sensor unit, the electric current of sensing and voltage signal are supplied to the processor process of testing circuit by current sensing unit and voltage sensor unit, multi-channel a/d converter port is electrically connected with the sensor output of ac input end interface respectively, the sensor of ac input end interface has current sensing unit and voltage sensor unit, the electric current of sensing and voltage signal are supplied to the processor process of testing circuit by current sensing unit and voltage sensor unit, and the result of processor process is presented at display.
3. the high precision test circuit of a kind of full-bridge rectification bearing power according to claim 1 and AC power, it is characterized in that: the current sensing unit in described ac input end interface is serially connected with resistance R and light-emitting component GFS at input end, light-emitting component GFS sends optical registration photoelectric cell GJS, and photoelectric cell GJS output voltage is electrically connected with A/D converter port; Voltage sensor unit is the mutual inductor L be socketed in ac circuit; The output terminal of mutual inductor L is electrically connected with A/D converter port.
4. the high precision test circuit of a kind of full-bridge rectification bearing power according to claim 1 and AC power, it is characterized in that: the current sensing unit in described ac input end interface is the voltage transformer (VT) T in input end serial connection, voltage transformer (VT) T one end is electrically connected with alternating current 220V, and voltage transformer (VT) T output terminal is electrically connected with A/D converter port; Voltage sensor unit is the mutual inductor L be socketed in ac circuit; The output terminal of mutual inductor L is electrically connected with A/D converter port.
5. the high precision test circuit of a kind of full-bridge rectification bearing power according to claim 1 and AC power, it is characterized in that: the current sensing unit in described DC output end interface is in load circuit, be connected in series light emitting diode D, the light emission direction of light emitting diode D has photelectric receiver G, the voltage received by photelectric receiver G or current value obtain average anode current; Voltage sensor unit in DC output end interface carries out dividing potential drop by resistance R1 and R2, and the voltage on R2 exports and provides DC output end voltage, and in order to not affect the impact of dividing potential drop on voltage detecting, the voltage on R2 is isolated by voltage follower.
6. the high precision test circuit of a kind of full-bridge rectification bearing power according to claim 1 and AC power, it is characterized in that: the current sensing unit in described DC output end interface is series resistor R0 in load circuit, voltage is obtained by resistance R0, resistance R0 is measuring resistance, weighs and obtains average anode current; Voltage sensor unit in DC output end interface carries out dividing potential drop by resistance R1 and R2, and the voltage on R2 exports and provides DC output end voltage, and in order to not affect the impact of dividing potential drop on voltage detecting, the voltage on R2 is isolated by voltage follower.
7. the high precision test circuit of a kind of full-bridge rectification bearing power according to claim 1 and AC power, it is characterized in that: described ac input end interface and DC output end interface have interface, by conductor terminal, ac input end interface and DC output end interface signal are incorporated into testing circuit input input port, be electrically connected with processor, sampled by processor, process, obtain alternating voltage, alternating current, DC voltage, DC current, alternating voltage and electric current adopt integral measurement, obtain average power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310550428.9A CN104635037A (en) | 2013-11-08 | 2013-11-08 | High-precision detection circuit for full-bridge rectification load power and alternating current power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310550428.9A CN104635037A (en) | 2013-11-08 | 2013-11-08 | High-precision detection circuit for full-bridge rectification load power and alternating current power |
Related Child Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310614221.3A Division CN104635041A (en) | 2013-11-08 | 2013-11-08 | Power detection DC connector of full-bridge rectifier constant-current source load |
| CN201310613482.3A Division CN104635039A (en) | 2013-11-08 | 2013-11-08 | Power detection AC connector of full-bridge rectifier constant-current source load |
| CN201310613978.0A Division CN104635040A (en) | 2013-11-08 | 2013-11-08 | AC-DC power detection circuit of full-bridge rectifier load |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104635037A true CN104635037A (en) | 2015-05-20 |
Family
ID=53214006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310550428.9A Withdrawn CN104635037A (en) | 2013-11-08 | 2013-11-08 | High-precision detection circuit for full-bridge rectification load power and alternating current power |
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| Country | Link |
|---|---|
| CN (1) | CN104635037A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109782057A (en) * | 2019-02-28 | 2019-05-21 | 海信（广东）空调有限公司 | Frequency-conversion domestic electric appliances single phase poaer supply inputs wattful power messurement circuit and method |
| CN110456146A (en) * | 2019-09-04 | 2019-11-15 | 深圳宝龙达信创科技股份有限公司 | Power detection device and power detecting method |
-
2013
- 2013-11-08 CN CN201310550428.9A patent/CN104635037A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109782057A (en) * | 2019-02-28 | 2019-05-21 | 海信（广东）空调有限公司 | Frequency-conversion domestic electric appliances single phase poaer supply inputs wattful power messurement circuit and method |
| CN109782057B (en) * | 2019-02-28 | 2021-04-30 | 海信（广东）空调有限公司 | Circuit and method for measuring input active power of single-phase power supply of variable-frequency household appliance |
| CN110456146A (en) * | 2019-09-04 | 2019-11-15 | 深圳宝龙达信创科技股份有限公司 | Power detection device and power detecting method |
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Application publication date: 20150520 |