CN103023325A - Low-power-consumption control method and circuit - Google Patents
Low-power-consumption control method and circuit Download PDFInfo
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- CN103023325A CN103023325A CN2012105319137A CN201210531913A CN103023325A CN 103023325 A CN103023325 A CN 103023325A CN 2012105319137 A CN2012105319137 A CN 2012105319137A CN 201210531913 A CN201210531913 A CN 201210531913A CN 103023325 A CN103023325 A CN 103023325A
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Abstract
The invention discloses a low-power-consumption control method used for load which has a continuously changing working state. The low-power-consumption control method includes the following steps: obtaining a state signal V1 changing in direct ratio with the load working state by aid of a sensor arranged on the load; using the state signal V1 and a reference signal V2 to generate a differential control signal V3; overlying the differential control signal V3 and a constant signal to generate an output signal Vout1+ used for controlling the load. The invention further discloses a circuit corresponding to the low-power-consumption control method. By adopting the low-power-consumption control method and circuit, continuously changing control signals can be supplied to the load having the continuously changing working state, and accordingly the load is ensured to have continuous power output; and simultaneously, compared with the prior art, the low-power-consumption control method and circuit remarkably reduce power consumption and improve reliability.
Description
Technical field
The invention belongs to circuit design field, the low power consumption control method that relates to a kind of load be used to having continuous variation operating state characteristic reaches the low power consumpting controling circuit that is used for this load.
Background technology
Star sensor is the important attitude measurement parts in the satellite control system, wherein comprises probe circuit, data processing circuit, refrigerator control circuit and the secondary power supply circuit of star sensor.The power supply of star sensor is input as the primary power source bus, and its inner employed various secondary power supplies provide by the secondary power supply circuit that is installed in star sensor inside.
The used refrigerator of star sensor has the cold control function of unilateral system.According to the operating characteristic of refrigerator, when needs reduce temperature on a large scale, need the secondary power supply circuit that the voltage of the highest 5V is provided; When needs are regulated temperature among a small circle, need the secondary power supply circuit that voltage less than 5V is provided.Therefore, it is its power supply that refrigerator needs the continuously adjustable secondary power supply circuit of a kind of output, and unexpected variation can not occur in supply power voltage, is 0V (or 0V transition is 5V) from 5V transition for example, guarantees that cooling module can not damaged owing to the sudden change of voltage.
In addition, the valving that satellite propulsion system is used, the momenttum wheels that satellite control system is used etc. all need to provide for it voltage of continuous variable.
For the load of the above-mentioned type, the control circuit of prior art as shown in Figure 1.What this supply line adopted is the method for carrying out pressure regulation at secondary power supply circuit output end series connection power MOSFET (or pliotron), cause having larger power loss on MOSFET, in the power deadweight loss, reduced the MOS device reliability.
Summary of the invention
Technology of the present invention is dealt with problems and is: for the deficiencies in the prior art, provide a kind of low power consumption control method of the load be used to having continuous variation operating state characteristic to reach the low power consumpting controling circuit that is used for this load, adopt the present invention to provide the continually varying control signal for the load of operating state continually varying, thereby proof load has continuous power stage, adopt simultaneously the present invention significantly to reduce power loss than prior art, improved reliability.
Technical solution of the present invention is:
One aspect of the present invention provides a kind of low power consumption control method, may further comprise the steps:
The transducer that utilization is installed on load obtains the status signal V that changes with loaded work piece state direct ratio
1
Utilize status signal V
1With reference signal V
2Produce difference control signal V
3
With described difference control signal V
3With the output signal V of the superimposed rear generation of constant signal for control load
Out1+
Further, in said method, described load is refrigerating plant, the described transducer output status signal V corresponding with refrigerating plant working temperature state
1
Further, in said method, described status signal V
1With described reference signal V
2Be voltage signal or current signal.
Further, in said method, described difference control signal V
3By described status signal V
1With reference signal V
2Superimposed acquisition.
Further, in said method, described load is according to output signal V
Out1+Size variation produce the power stage of corresponding size variation.
The present invention provides a kind of low power consumpting controling circuit on the other hand, and this circuit comprises: the status signal V that the operating state direct proportion of output and described load changes
1Transducer, produce reference signal V
2Reference cell. this circuit also comprises control unit and regulated power supply,
Described control unit is according to status signal V
1With reference signal V
2Output difference dividing control signal V
3
Described regulated power supply is with difference control signal V
3With the output signal V of the superimposed rear generation of constant signal for control load work
Out1+
Further, in foregoing circuit, described load is refrigerating plant, the status signal v of described transducer output
1With the variation in direct ratio of refrigerating plant working temperature.
Further, in foregoing circuit, described control unit is the PID controller.
Further, in foregoing circuit, described load is according to output signal V
Out1+Size variation produce the power stage of corresponding size variation.
Further, in foregoing circuit, described status signal V
1With described reference signal V
2Be voltage signal or current signal.
The present invention compared with prior art has following advantage:
1) supply voltage is adjustable continuously: the circuit of prior art as shown in Figure 1, on the bus behind the electric-opening, power supply is realized the DC/DC mapping function, and busbar voltage is transformed to the supply power voltage V that load needs
Out1+=5V, and provide voltage for transducer, benchmark and P adjuster; Installation of sensors measures the voltage signal V relevant with the loaded work piece feature in load
1, this signal and reference voltage V
2Compare in P adjuster inside, the P adjuster carries out proportional control according to comparison signal; This control signal is during greater than 4V, so that the complete conducting of MOSFET, the voltage in the load is V
Out1+This control signal is during less than 2V, so that MOSFET closes gradually, the voltage of load this moment is reduced to 0V from 5V gradually, and the drain source voltage of MOSFET is increased to 5V from 0V gradually; Electric power output voltage unanimously remains unchanged in this process.
The present invention as shown in Figure 3, on the bus behind the electric-opening, regulated power supply is realized the DC/DC mapping function, and busbar voltage is transformed to the supply power voltage V that load needs
Out1+Installation of sensors measures the voltage signal V relevant with the loaded work piece feature in load
1, this signal and reference voltage V
2Compare in PID adjuster inside, the PID adjuster carries out PID control, the positive output V of this control signal and regulated power supply according to comparison signal
Out1+Superpose and produce V
3Signal also feeds back to regulated power supply, and regulated power supply is controlled its output voltage V according to this feedback signal
Out1+Work as V
1When changing continuously, V
3Produce in proportion continuously variation, then regulated power supply output voltage V
Out1+Inverse proportion produces continuously and changes.
2) low in energy consumption: the power loss on the prior art MOSFET is,
Wherein, R
1oadEquivalent internal resistance for load.
Then,
By formula (1) as can be known, the power loss of prior art on MOSFET surpassed the used power consumption of load itself.
In the present invention, owing to do not re-use MOSFET, then there is not corresponding power loss, and because the reduction of power loss, improved accordingly the reliability that adopts circuit behind the present invention yet.
Description of drawings
Fig. 1 is prior art circuits figure;
Fig. 2 is the inventive method flow chart;
Fig. 3 is circuit diagram of the present invention;
Embodiment
Below just by reference to the accompanying drawings the present invention is done further introduction.
As shown in Figure 2, the method for the invention realizes continuous control to the load power output by following steps behind loaded work piece:
1, utilize the transducer that is installed on load to obtain the status signal V that changes with loaded work piece state direct ratio
1
Behind the loaded work piece, its operating state changes along with the variation of power output, the transducer that is installed in the load can produce the corresponding signal of telecommunication by the induction to the loaded work piece state, with a kind of the be applied as example of the present invention on the spacecraft refrigerator, the operating state of refrigerator is the working temperature of refrigerator, described transducer adopts thermistor, by the induction to the refrigerator working temperature, can export the voltage signal that changes in proportion with working temperature as status signal V
1Simultaneously, this status signal V
1Also can be the current signal that obtains by thermistor.
2, utilize status signal V
1With reference signal V
2Produce difference control signal V
3
Reference signal V
2Be a constant signal of telecommunication, can for the voltage signal identical with the voltage signal of above-mentioned thermistor acquisition, also can be current signal.
By with status signal V
1With reference signal V
2Carry out calculus of differences and can obtain difference control signal V
3, this calculus of differences can be status signal V
1With reference signal V
2Superposition.
3, with described difference control signal V
3With the output signal V of the superimposed rear generation of constant signal for control load
Out1+
Utilize the difference control signal V of above-mentioned acquisition
3Further with the superimposed output signal V that just can obtain for control load work of constant signal
Out1+Corresponding to above-mentioned refrigerator, this output signal V
Out1+Be the operating voltage signal of refrigerator, refrigerator is according to the power stage of the size variation generation response change rule of operating voltage, and namely when the operating voltage signal increased, then refrigerator increased power output; Otherwise when operating voltage reduced, then refrigerator reduced power output.Corresponding to as output signal V
Out1+Current signal, refrigerator produces the power stage of same rule.
When the power output of load changed, the corresponding variation occured in the operating state of load, the status signal V after then transducer can obtain to change accordingly again
1Thereby, can realize adjustable continuously to the load power output, finally realize the stable output of bearing power.
Such as Fig. 3, be circuit diagram of the present invention.This circuit comprises the load that links to each other with this control circuit, is installed on transducer, reference cell, control unit and regulated power supply in the load.
The load that is connected in this circuit has continuous variation operating state, such as refrigerator, valving and momenttum wheel etc.
It is status signal V that transducer can produce the corresponding signal of telecommunication by the induction to the loaded work piece state
1, this status signal V
1Can be voltage signal or current signal.
Reference cell is for generation of reference signal V
2, this reference signal V
2With status signal V
1Has identical dimension.
The input of control unit receives respectively above-mentioned status signal V
1With reference signal V
2And to status signal V
1With reference signal V
2Carry out calculus of differences and obtain difference control signal V
3, the embodiment of the invention adopts the PID controller as a kind of implementation of control unit, PID controller accepting state signal V
1With reference signal V
2, by with status signal V
1With reference signal V
2Compare, thereby produce a status signal V
1With respect to reference signal V
2Comparison signal as difference control signal V
3
Regulated power supply links to each other with control unit, and the difference control signal V of reception control unit generation
3Have a constant voltage in regulated power supply inside and be used for the output constant signal, regulated power supply is with difference control signal V
3After the constant signal stack, produce the output signal V that is used for control load
Out1+
Load on and receive output signal V
Out1+Rear according to output signal V
Out1+Size produce the corresponding power stage that changes.
In embodiments of the present invention, the load that can produce the continuous duty variation is not limited to refrigerator, can also provide power supply for valving and momenttum wheel etc.
By adopting the present invention significantly to lower power loss than prior art, in prior art as shown in Figure 1, the maximum power loss on MOSFET is
Surpassed the used maximum power dissipation of load itself
R
LoadBe load resistance.
In the present invention, owing to do not re-use MOSFET, then there is not corresponding power loss, and because the reduction of power loss, improved accordingly the reliability that adopts circuit behind the present invention yet.
The unspecified part of the present invention belongs to general knowledge as well known to those skilled in the art.
Claims (10)
1. low power consumption control method that is used for load, described load has the continually varying operating state, it is characterized in that, may further comprise the steps:
The transducer that utilization is installed on load obtains the status signal V that changes with loaded work piece state direct ratio
1
Utilize status signal V
1With reference signal V
2Produce difference control signal V
3
With described difference control signal V
3With the output signal V of the superimposed rear generation of constant signal for control load
Out1+
2. method as claimed in claim 1, its spy is: described load is refrigerating plant, the described transducer output status signal V corresponding with refrigerating plant working temperature state
1
3. method as claimed in claim 1 or 2, its spy is: described status signal V
1With described reference signal V
2Be voltage signal or current signal.
4. method as claimed in claim 1, its spy is: described difference control signal V
3By described status signal V
1With reference signal V
2Superimposed acquisition.
5. method as claimed in claim 1, its spy is: described load is according to output signal V
Out1+Size variation produce the power stage of corresponding size variation.
6. low power consumpting controling circuit that is used for load is used for load with continuous variation operating state, and this circuit comprises: the status signal V that the operating state direct proportion of output and described load changes
1Transducer, produce reference signal V
2Reference cell, it is characterized in that: this circuit also comprises control unit and regulated power supply,
Described control unit is according to status signal V
1With reference signal V
2Output difference dividing control signal V
3
Described regulated power supply is with difference control signal V
3With the output signal V of the superimposed rear generation of constant signal for control load work
Out1+
7. circuit as claimed in claim 6, it is characterized in that: described load is refrigerating plant, the status signal V of described transducer output
1With the variation in direct ratio of refrigerating plant working temperature.
8. circuit as claimed in claim 6, it is characterized in that: described control unit is the PID controller.
9. circuit as claimed in claim 6, it is characterized in that: described load is according to output signal V
Out1+Size variation produce the power stage of corresponding size variation.
10. such as circuit as described in arbitrary in the claim 6～9, it is characterized in that: described status signal V
1With described reference signal V
2Be voltage signal or current signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210531913.7A CN103023325B (en) | 2012-12-06 | 2012-12-06 | Low-power-consumptiocontrol control method and circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210531913.7A CN103023325B (en) | 2012-12-06 | 2012-12-06 | Low-power-consumptiocontrol control method and circuit |
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| Publication Number | Publication Date |
|---|---|
| CN103023325A true CN103023325A (en) | 2013-04-03 |
| CN103023325B CN103023325B (en) | 2015-11-25 |
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|---|---|---|---|
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110701733A (en) * | 2019-10-11 | 2020-01-17 | 广东美的制冷设备有限公司 | Power supply circuit control method, power supply circuit and air conditioner |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4593258A (en) * | 1985-02-13 | 1986-06-03 | Gerald Block | Energy conserving apparatus for regulating temperature of monitored device |
| US5752385A (en) * | 1995-11-29 | 1998-05-19 | Litton Systems, Inc. | Electronic controller for linear cryogenic coolers |
| CN1489124A (en) * | 2002-08-27 | 2004-04-14 | ��ķ�ɷ�����˾ | Display device with temperature compensating function |
| US20080030172A1 (en) * | 2006-07-27 | 2008-02-07 | Stmicroelectronics Limited | Battery charger with thermal regulation and soft start |
| CN101441502A (en) * | 2007-11-21 | 2009-05-27 | 英业达股份有限公司 | Apparatus and method for adjusting decompression change-over circuit working frequency by detection temperature |
-
2012
- 2012-12-06 CN CN201210531913.7A patent/CN103023325B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4593258A (en) * | 1985-02-13 | 1986-06-03 | Gerald Block | Energy conserving apparatus for regulating temperature of monitored device |
| US5752385A (en) * | 1995-11-29 | 1998-05-19 | Litton Systems, Inc. | Electronic controller for linear cryogenic coolers |
| CN1489124A (en) * | 2002-08-27 | 2004-04-14 | ��ķ�ɷ�����˾ | Display device with temperature compensating function |
| US20080030172A1 (en) * | 2006-07-27 | 2008-02-07 | Stmicroelectronics Limited | Battery charger with thermal regulation and soft start |
| CN101441502A (en) * | 2007-11-21 | 2009-05-27 | 英业达股份有限公司 | Apparatus and method for adjusting decompression change-over circuit working frequency by detection temperature |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110701733A (en) * | 2019-10-11 | 2020-01-17 | 广东美的制冷设备有限公司 | Power supply circuit control method, power supply circuit and air conditioner |
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| CN103023325B (en) | 2015-11-25 |
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