CN107919793A - The control circuit and control method and power circuit of a kind of switch converters - Google Patents
The control circuit and control method and power circuit of a kind of switch converters Download PDFInfo
- Publication number
- CN107919793A CN107919793A CN201711384707.7A CN201711384707A CN107919793A CN 107919793 A CN107919793 A CN 107919793A CN 201711384707 A CN201711384707 A CN 201711384707A CN 107919793 A CN107919793 A CN 107919793A
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- Prior art keywords
- pwm
- switch converters
- storage capacitor
- temperature
- waveform
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
- Dc-Dc Converters (AREA)
Abstract
The embodiment of the present invention provides a kind of control circuit and control method and power circuit of switch converters, it is related to electronic device field, equipment can be ensured to realize at low temperature reliably to start and work, effectively improve the environmental suitability of equipment, reduce buying and client's use cost.The control circuit of switch converters includes：Temperature detection control module, for the current environmental temperature of the storage capacitor of detection switch converter, according to the input PWM frequency value of current environmental temperature acquisition switch converters；According to input PWM frequency value driving PWM control module generation PWM waveforms；PWM control modules, for exporting PWM waveform to the switch converters.
Description
Technical field
The embodiment of the present invention is related to electronic device field, more particularly to a kind of control circuit of switch converters and control
Method and power circuit.
Background technology
Widely applied with advances in technology with development, high performance communication equipment.The thing followed is power of communication equipment
It is increasing, especially rack communication equipment, it is therefore desirable to which large power supply module is whole system power supply.To ensure equipment
Reliable to start and work, the startup of medium-and-large-sized communication system and operating ambient temperature are generally scheduled on 0 DEG C~45 DEG C scopes.General feelings
Under condition, power supply electrifying, quota output, provides enough electric energy for system and supports, the board mounted power on each board is started to work, with
System starts on each board afterwards.
With the development of the society, the scope that communication equipment uses is more and more wider.In spring, winter, the northern area of China ring
Border temperature is generally less than 0 DEG C, and some places environment temperature can drop to subzero 30/40 degree, and the capacitance of storage capacitor can significantly drop
It is low, it can so greatly limit communication equipment and normally start in low temperature environment.Reliably start and work to cause the device to,
Improve the working environment of communication equipment, otherwise improve the environmental suitability of equipment.Common method has：1st, equipment work has warm
The room of gas or air-conditioning, but energy consumption and cost are higher；2nd, heating element is placed in equipment, improves equipment internal environment, but cost
Higher, control is complicated, and has the risk of damage equipment out of control；3rd, the equipment for selecting technical grade, but the environment temperature of most time
Meet 0 DEG C~45 DEG C, equipment purchase is of high cost, wastes larger.Therefore, communication equipment needs to have preferable environmental suitability,
To meet relatively low buying and use cost, and adapt to the use environment of wide geographic area user.
The content of the invention
The embodiment of the present invention provides a kind of control circuit and control method and power circuit of switch converters, it is ensured that
Equipment is realized at low temperature reliably to be started and works, and effectively improves the environmental suitability of equipment, reduces buying and client uses
Cost.
First aspect, there is provided a kind of control circuit of switch converters, including：Temperature detection control module, PWM control moulds
Block；
Temperature detection control module, for the current environmental temperature of the storage capacitor of detection switch converter, according to described
Current environmental temperature obtains the input PWM frequency value of switch converters；
The temperature detection control module, is additionally operable to drive the PWM control modules life according to the input PWM frequency value
Into PWM waveform；
The PWM control modules, for exporting the PWM waveform to the switch converters.
Second aspect, there is provided a kind of control method of switch converters, including：
The current environmental temperature of the storage capacitor of detection switch converter, obtains switch according to the current environmental temperature and becomes
The input PWM frequency value of parallel operation；
According to the input PWM frequency value generation PWM waveform；
The PWM waveform is exported to the switch converters.
The third aspect, there is provided a kind of power circuit, including：The control circuit and switch change-over of above-mentioned switch converters
Device.
In such scheme, the control circuit of switch converters, including：Temperature detection control module, PWM control modules；
Temperature detection control module is capable of the current environmental temperature of the storage capacitor of detection switch converter, according to the current environment temperature
Degree obtains the input PWM frequency value of switch converters；The PWM control modules generation is driven according to the input PWM frequency value
PWM waveform；PWM control modules can export the PWM waveform to the switch converters, be become with controlling switch
The output of parallel operation；Ensure that equipment is realized at low temperature reliably to start and work, effectively improve the environmental suitability of equipment, reduce
Buying and client's use cost.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be in embodiment or description of the prior art
Required attached drawing is briefly described, it should be apparent that, drawings in the following description are only some realities of the present invention
Example is applied, for those of ordinary skill in the art, without creative efforts, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of structure chart of power circuit provided in an embodiment of the present invention；
Fig. 2 is a kind of structure chart of the control circuit of switch converters provided in an embodiment of the present invention；
Fig. 3 is a kind of structure chart of the control circuit for switch converters that another embodiment of the present invention provides；
Fig. 4 is a kind of flow chart of the control method for switch converters that another embodiment of the present invention provides.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment, belongs to the scope of protection of the invention.
With reference to shown in Fig. 1, embodiments herein provides a kind of power circuit, including：The control circuit of switch converters
11 and switch converters 12.Switch converters 12 generally include isolated topology (isolating transformer, switching tube, storage capacitor) with
And isolation feedback circuit, the PWM waveform that wherein switch converters 12 can be exported according to the control circuit 11 of switch converters are believed
The power supply signal of number generation rated power, to provide power supply to the business board of communication equipment or function module.Switch change-over
The topology of device 12 is generally normal shock, half-bridge, full-bridge, recommends, the topological classification such as resonance, and main realize cuts the voltage of input power
The functions such as ripple, filtering, energy storage.In addition the power circuit further includes standby (standby) power supply 13, its output power is relatively
It is small, 12V or 5V voltages are generally provided, the control circuit 11 of its connecting valve converter is used to carry to each module of the control circuit
Power supply source.
As shown in Fig. 2, embodiments herein provides a kind of control circuit of switch converters, including：Temperature detection control
Molding block 21, PWM control modules 22；
Temperature detection control module 21, for the current environmental temperature of the storage capacitor of detection switch converter 12, according to
Current environmental temperature obtains the input PWM frequency value of switch converters 12；
Temperature detection control module 21, is additionally operable to generate PWM ripples according to input PWM frequency value driving PWM control modules 22
Shape signal；
PWM control modules 22, for exporting PWM waveform to switch converters 12.
In such scheme, the control circuit of switch converters, including：Temperature detection control module, PWM control modules；
Temperature detection control module is capable of the current environmental temperature of the storage capacitor of detection switch converter, according to the current environment temperature
Degree obtains the input PWM frequency value of switch converters；The PWM control modules generation is driven according to the input PWM frequency value
PWM waveform；PWM control modules can export the PWM waveform to the switch converters, be become with controlling switch
The output of parallel operation；It can so ensure equipment to realize at low temperature reliably to start and work, the environment for effectively improving equipment is fitted
Ying Xing, reduces buying and client's use cost.
With reference to shown in Fig. 3, temperature detection control module 21 includes：Processor 211 and temperature sensor 212；
Temperature sensor 212 is used for the current environmental temperature of the storage capacitor of detection switch converter 12；
Processor 211 is used for the capacitance that the storage capacitor of switch converters 12 is obtained according to current environmental temperature, according to storage
The capacitance of energy capacitance calculates the input PWM frequency value of switch converters 12.
Wherein, processor 211 can use MCU etc. to have the function of the integrated circuit of logic control.Industry in communication equipment
Business plate or function module are powered by high-power AC-DC (AC-DC conversion) power supply, in the present solution, 12 structure of switch converters
Into high-power AC-DC power supplys, when the output power of AC-DC power supplys is constant, the input PWM frequency value of general AC-D/C power with
The evolution of the capacitance of the storage capacitor of power supply or the capacitance of storage capacitor is inversely proportional.When environment temperature is less than subzero,
The capacitance of storage capacitor (being usually electrolytic capacitor) declines, and temperature sensor 212 reads the environment temperature of storage capacitor, according to ring
The environment temperature of border temperature inquiry storage capacitor and the mapping table of capacitance obtain the capacitance of storage capacitor under current state,
The capacitance of storage capacitor and the functional relation formula of environment temperature can certainly be built in advance, passed through when obtaining environment temperature
The relation formula calculates the capacitance of storage capacitor under current state, and the defeated of switch converters 12 is calculated according to the capacitance of storage capacitor
Enter PWM frequency value, under usual hot environment corresponding input PWM frequency value relatively under, corresponding input PWM frequency under low temperature environment
Be worth it is larger so that ensure low temperature environment lower switch converter can export enough electric energy ensure complete machine start.Certainly, with
The continuous firing of equipment, switch converters self-radiating, the environment temperature rise of storage capacitor, the capacitance of storage capacitor are slowly returned
Rising, when the environment temperature to be checked for measuring storage capacitor goes back up to more than 0 degree, the capacitance of storage capacitor recovers normal at this time, this
Corresponding input PWM frequency value under Shi Huifu room temperature.
Exemplary, temperature detection control module 21 further includes storage unit 213；Storage unit 213 stores storage capacitor
Environment temperature and capacitance mapping table；Processor 211 is used to inquire about mapping table acquisition according to current environmental temperature
The capacitance of the storage capacitor of current environmental temperature lower switch converter.
In addition, 22 generally use oscillating circuit of PWM control modules shakes principle by RC forms predetermined waveform (such as triangle
Ripple or rectangular wave) carrier wave as pulsewidth modulation, and PWM waveform of the final output with predetermined waveform with frequency, and with the PWM
Waveform signal driving switch converter 12 exports the power supply signal of rated power, and RC concussions principle can be by adjusting concussion electricity
The resistance value of resistance realizes the adjustment to predetermined waveform frequency, therefore temperature detection control module 21 further includes：Resistive switching device
214；Resistive switching device 214 is used to obtain concussion resistance value according to input PWM frequency value；PWM control modules 22 are specifically used
In generating predetermined waveform according to concussion resistance value driving oscillating circuit, and PWM waveform is generated according to predetermined waveform.It is exemplary
Resistive switching device 214 can use control oscillating circuit in digital regulation resistance form concussion resistance resistance value realize,
Resistive switching device 213 can pass through I2C buses or spi bus connection processing device 211 (for example, MCU), processor 211
Come to obtain the power supply signal of the output rated power of switch converters 12 in the environment temperature pair from storage unit 213 according to environment temperature
The input PWM frequency value answered, processor 211 calculate the corresponding concussion resistance of the PWM frequency value according to corresponding calculation formula
Value, processor 211 export certain resistance value to the vibration electricity of PWM control modules 22 by bus marco resistive switching device 214
Road, so as to obtain the predetermined waveform corresponding to environment temperature, environment temperature is lower, and the PWM frequency of predetermined waveform is higher, and temperature is returned
Rise, the PWM frequency of predetermined waveform reduces.
In addition, the operation principle of PWM control modules 22 is：By the output signal of 12 closed loop feedback of switch converters by putting
The PWM waveform of certain duty cycle is produced after big and modulation, the output letter of switch converters 12 is adjusted by the PWM waveform
Number amplitude.The PWM control modules for being generally used for switch converters 12 use electric current loop and Voltage loop ring feedback.Therefore, PWM
Control module 22 is additionally operable to receive the output signal that switch converters 12 are fed back；PWM control modules 12 are specifically used for according to output
Signal and predetermined waveform, generate predetermined PWM waveform.Wherein switch converters 12 are controlled by isolation feedback circuit to PWM
The output signal of 22 feedback switch converter 12 of module.
With reference to shown in Fig. 4, embodiments herein provides a kind of control method of switch converters, for above-mentioned switch
The control circuit of converter, including：
101st, the current environmental temperature of the storage capacitor of detection switch converter, obtains according to the current environmental temperature and opens
Close the input PWM frequency value of converter.
Step 101 is specially：The current environmental temperature of the storage capacitor of detection switch converter；According to the current environment
Temperature obtains the capacitance of the storage capacitor of switch converters, and the input of switch converters is calculated according to the capacitance of the storage capacitor
PWM frequency value.Exemplary, the capacitance for obtaining the storage capacitor of switch converters specifically includes：Looked into according to current environmental temperature
The mapping table of the environment temperature and capacitance of asking storage capacitor obtains the energy storage of the current environmental temperature lower switch converter
The capacitance of capacitance.
102nd, according to the input PWM frequency value generation PWM waveform.
Step 102 specifically includes：Concussion resistance value is obtained according to input PWM frequency value；According to concussion resistance value driving
Oscillating circuit generates predetermined waveform, and generates PWM waveform according to predetermined waveform.
103rd, PWM waveform is exported to switch converters.
With reference to the operation principle of above-mentioned PWM control modules, further included before step 103：Receive switch converters feedback
Output signal；Step 103 specifically, according to predetermined waveform generate PWM waveform, including：According to it is described output signal and
The predetermined waveform, generates the predetermined PWM waveform.The reality described with the concrete function of above-mentioned control circuit is described in detail
Applying example, identical which is not described herein again.
In such scheme, what the control circuit of switch converters was capable of the storage capacitor of detection switch converter works as front ring
Border temperature, the input PWM frequency value of switch converters is obtained according to the current environmental temperature；According to the input PWM frequency
Value generation PWM waveform；The PWM waveform is exported to the switch converters, with the defeated of controlling switch converter
Go out；It can so ensure equipment to realize at low temperature reliably to start and work, effectively improve the environmental suitability of equipment, reduce
Buying and client's use cost.
The above description is merely a specific embodiment, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (11)
- A kind of 1. control circuit of switch converters, it is characterised in that including：Temperature detection control module, PWM control modules；Temperature detection control module, for the current environmental temperature of the storage capacitor of detection switch converter, according to described current Environment temperature obtains the input PWM frequency value of switch converters；The temperature detection control module, is additionally operable to drive the PWM control modules generation according to the input PWM frequency value PWM waveform；The PWM control modules, for exporting the PWM waveform to the switch converters.
- 2. circuit according to claim 1, it is characterised in that the temperature detection control module includes：Processor and temperature Spend sensor；The temperature sensor is used for the current environmental temperature of the storage capacitor of detection switch converter；The processor is used for the capacitance that the storage capacitor of switch converters is obtained according to the current environmental temperature, according to described The capacitance of storage capacitor calculates the input PWM frequency value of the switch converters.
- 3. circuit according to claim 1 or 2, it is characterised in that the temperature detection control module further includes：Resistance turns Parallel operation part；The resistive switching device is used to obtain concussion resistance value according to the input PWM frequency value；The PWM control modules are specifically used for according to the predetermined waveform of the concussion resistance value driving oscillating circuit generation, and according to The predetermined waveform generation PWM waveform.
- 4. circuit according to claim 3, it is characterised in that the PWM control modules are additionally operable to receive switch converters The output signal of feedback；The PWM control modules are specifically used for, according to the output signal and the predetermined waveform, generating the predetermined PWM waveform Signal.
- 5. circuit according to claim 2, it is characterised in that the temperature detection control module includes：Storage unit；The environment temperature of the storage unit storage storage capacitor and the mapping table of capacitance；The processor is used to inquire about the mapping table acquisition current environmental temperature according to the current environmental temperature Under the switch converters storage capacitor capacitance.
- A kind of 6. control method of switch converters, it is characterised in that including：The current environmental temperature of the storage capacitor of detection switch converter, switch converters are obtained according to the current environmental temperature Input PWM frequency value；According to the input PWM frequency value generation PWM waveform；The PWM waveform is exported to the switch converters.
- 7. control method according to claim 6, it is characterised in that the storage capacitor of the detection switch converter is worked as Preceding environment temperature, the input PWM frequency value of switch converters is obtained according to the current environmental temperature；The current environmental temperature of the storage capacitor of detection switch converter；The capacitance of the storage capacitor of switch converters is obtained according to the current environmental temperature, according to the capacitance of the storage capacitor Calculate the input PWM frequency value of the switch converters.
- 8. the control method according to claim 6 or 7, it is characterised in that described according to the input PWM frequency value generation PWM waveform, including：Concussion resistance value is obtained according to the input PWM frequency value；Predetermined waveform is generated according to the concussion resistance value driving oscillating circuit, and PWM waveform is generated according to the predetermined waveform Signal.
- 9. control method according to claim 8, it is characterised in that the method further includes：It is anti-to receive switch converters The output signal of feedback；It is described that PWM waveform is generated according to the predetermined waveform, including：Signal and the predetermined waveform are exported according to described, Generate the predetermined PWM waveform.
- 10. control method according to claim 7, it is characterised in that described that institute is inquired about according to the current environmental temperature The mapping table of the environment temperature and capacitance of stating storage capacitor obtains the switch converters under the current environmental temperature The capacitance of storage capacitor.
- A kind of 11. power circuit, it is characterised in that including：The control circuit of switch converters as claimed in claim 1 and Switch converters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711384707.7A CN107919793A (en) | 2017-12-20 | 2017-12-20 | The control circuit and control method and power circuit of a kind of switch converters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711384707.7A CN107919793A (en) | 2017-12-20 | 2017-12-20 | The control circuit and control method and power circuit of a kind of switch converters |
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| Publication Number | Publication Date |
|---|---|
| CN107919793A true CN107919793A (en) | 2018-04-17 |
Family
ID=61893863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711384707.7A Pending CN107919793A (en) | 2017-12-20 | 2017-12-20 | The control circuit and control method and power circuit of a kind of switch converters |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110377078A (en) * | 2019-07-31 | 2019-10-25 | 中国科学院国家天文台 | Electronic device operating temperature control method and device under a kind of low temperature environment |
| CN111829142A (en) * | 2020-06-24 | 2020-10-27 | 深圳供电局有限公司 | Air conditioner control device and method and air conditioning system |
| CN113472190A (en) * | 2021-06-11 | 2021-10-01 | 深圳欧陆通电子股份有限公司 | Low-temperature starting method of switching power supply and switching power supply |
| WO2022000248A1 (en) * | 2020-06-30 | 2022-01-06 | 华为数字能源技术有限公司 | Inverter, and inversion system and method |
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| CN201188195Y (en) * | 2008-04-30 | 2009-01-28 | 微星科技股份有限公司 | Apparatus for controlling temperature of pulse duration modulation device |
| CN101442864A (en) * | 2007-11-20 | 2009-05-27 | 台达电子工业股份有限公司 | Current regulation circuit and power supply component containing the same |
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2017
- 2017-12-20 CN CN201711384707.7A patent/CN107919793A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101442864A (en) * | 2007-11-20 | 2009-05-27 | 台达电子工业股份有限公司 | Current regulation circuit and power supply component containing the same |
| CN201188195Y (en) * | 2008-04-30 | 2009-01-28 | 微星科技股份有限公司 | Apparatus for controlling temperature of pulse duration modulation device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110377078A (en) * | 2019-07-31 | 2019-10-25 | 中国科学院国家天文台 | Electronic device operating temperature control method and device under a kind of low temperature environment |
| CN111829142A (en) * | 2020-06-24 | 2020-10-27 | 深圳供电局有限公司 | Air conditioner control device and method and air conditioning system |
| WO2022000248A1 (en) * | 2020-06-30 | 2022-01-06 | 华为数字能源技术有限公司 | Inverter, and inversion system and method |
| CN113472190A (en) * | 2021-06-11 | 2021-10-01 | 深圳欧陆通电子股份有限公司 | Low-temperature starting method of switching power supply and switching power supply |
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