CN108270350A - A kind of startup control device and method of pfc circuit - Google Patents
A kind of startup control device and method of pfc circuit Download PDFInfo
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- CN108270350A CN108270350A CN201710002745.5A CN201710002745A CN108270350A CN 108270350 A CN108270350 A CN 108270350A CN 201710002745 A CN201710002745 A CN 201710002745A CN 108270350 A CN108270350 A CN 108270350A
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- pfc circuit
- output voltage
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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
- H02M1/36—Means for starting or stopping 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
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
A kind of startup control device and method of pfc circuit, the startup control device of pfc circuit can detect the output voltage of pfc circuit；If it is determined that output voltage desired value of the output voltage values of the pfc circuit less than setting, then carry out current limliting to the input current of the pfc circuit；If it is determined that output voltage desired value of the output voltage values of the pfc circuit not less than setting, then terminate and carry out current limliting to the input current of the pfc circuit.That is, before the output voltage of pfc circuit boosts to the output voltage desired value of setting, the startup control device of pfc circuit carries out current limliting to the input current of pfc circuit always, and can avoiding the problem that output voltage due to pfc circuit and input voltage, there are starting current caused by larger voltage difference is excessive, circuit overheats；Even if high pressure in short-term occurs in power-supply fluctuation, dash current will not occur in pfc circuit, it is ensured that the safety and reliability of pfc circuit.
Description
Technical field
The present invention relates to power technique fields more particularly to a kind of startup control device and methods of pfc circuit.
Background technology
PFC (Power Factor Correction, PFC) is effective power and total power consumption (apparent work(
Rate) ratio, can be used for weigh the degree that electric power is used effectively, the value of power factor is bigger, and electric power utilization rate is higher.Number
Pfc circuit in word power supply is digital electric to improve by the way that switching device input current waveform is controlled to follow input voltage waveform
The power factor in source, so as to reduce the loss of Power Exchange.
But the pfc circuit in digital power, especially for the pfc circuit with boost function in start-up course, deposit
It is larger in starting current, there is the problem of superheating phenomenon, component can be even burnt when serious, reduces pfc circuit and number
The reliability of power supply.
Invention content
An embodiment of the present invention provides a kind of startup control device and method of pfc circuit, to solve existing PFC electricity
The problem of reliability caused by road starting current is larger is low.
An embodiment of the present invention provides a kind of startup control device of pfc circuit, the startup control devices of the pfc circuit
Including detection module, control module and overcurrent protection module, wherein：
The detection module, for detecting the output voltage of pfc circuit；
The control module, for determining output voltage desired value of the output voltage values of the pfc circuit less than setting
When, export first control signal to the overcurrent protection module；Determine the output voltage values of the pfc circuit not less than setting
During output voltage desired value, second control signal is exported to the overcurrent protection module；
The overcurrent protection module is respectively connected with the output port of power supply and the input port of the pfc circuit, is used
In when receiving the first control signal, current limliting is carried out to the input current of the pfc circuit, is receiving described second
When controlling signal, terminate and current limliting is carried out to the input current of the pfc circuit.
Correspondingly, the embodiment of the present invention additionally provides a kind of pfc circuit, the startup control device including above-mentioned pfc circuit.
Correspondingly, the embodiment of the present invention additionally provides a kind of startup control method of pfc circuit, the method includes：
The output voltage for starting control device detection pfc circuit of pfc circuit；
If it is determined that output voltage desired value of the output voltage values of the pfc circuit less than setting, then to the pfc circuit
Input current carry out current limliting；If it is determined that output voltage desired value of the output voltage values of the pfc circuit not less than setting, then
It terminates and current limliting is carried out to the input current of the pfc circuit.
The present invention has the beneficial effect that：
The startup control device and method of pfc circuit provided in an embodiment of the present invention, the startup control device of pfc circuit can
Detect the output voltage of pfc circuit；If it is determined that output voltage desired value of the output voltage values of the pfc circuit less than setting,
Current limliting then is carried out to the input current of the pfc circuit；If it is determined that the output voltage values of the pfc circuit are defeated not less than setting
Go out voltage-target, then terminate and current limliting is carried out to the input current of the pfc circuit.That is, in the output electricity of pfc circuit
Before pressure boosts to the output voltage desired value of setting, the startup control device of pfc circuit is always to the input current of pfc circuit
Current limliting is carried out, can be avoided since the output voltage and input voltage of pfc circuit are electric there are starting caused by larger voltage difference
Flow through the problem of big, circuit overheats；Even if high pressure in short-term occurs in power-supply fluctuation, dash current will not occur in pfc circuit, really
The safety and reliability of pfc circuit is protected.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly introduced, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the present invention, for this
For the those of ordinary skill in field, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 show the structure diagram of the startup control device of the pfc circuit in the embodiment of the present invention one；
Fig. 2 show the structure diagram of the overcurrent protection module in the embodiment of the present invention one；
Fig. 3 show a kind of concrete structure schematic diagram of the overcurrent protection module in the embodiment of the present invention one；
Fig. 4 show a kind of concrete structure schematic diagram of the startup control device of the pfc circuit in the embodiment of the present invention one；
Fig. 5 show the step flow chart of the startup control method of the pfc circuit in the embodiment of the present invention two.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention is made below in conjunction with attached drawing into
It is described in detail to one step, it is clear that described embodiment is only the implementation of part of the embodiment of the present invention rather than whole
Example.Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without making creative work
All other embodiment, shall fall within the protection scope of the present invention.
Embodiment one：
The embodiment of the present invention one provides a kind of startup control device of pfc circuit, specifically, as shown in Figure 1, it is this
Device described in inventive embodiments one structure diagram (Fig. 1 by taking the pfc circuit of two-phase electricity as an example, the pfc circuit of three-phase electricity
Start the structure of control device similarly), the startup control device of the pfc circuit includes detection module 11,12 and of control module
Overcurrent protection module 13, wherein：
The detection module 11, for detecting the output voltage of pfc circuit；
The control module 12, for determining output voltage target of the output voltage values of the pfc circuit less than setting
During value, first control signal is exported to the overcurrent protection module 13；It determines that the output voltage values of the pfc circuit are not less than to set
During fixed output voltage desired value, second control signal is exported to the overcurrent protection module 13；
The overcurrent protection module 13 is respectively connected with the output port of power supply and the input port of the pfc circuit,
For when receiving the first control signal, current limliting is carried out to the input current of the pfc circuit, is receiving described the
During two control signals, terminate and current limliting is carried out to the input current of the pfc circuit.
That is, before the output voltage of pfc circuit boosts to the output voltage desired value of setting, pfc circuit
Start control device and current limliting is carried out to the input current of pfc circuit always, the output voltage due to pfc circuit and input can be avoided
Starting current caused by voltage has larger voltage difference is excessive, circuit overheat；Even if power-supply fluctuation occurs in short-term
The safety and reliability of pfc circuit will not occur dash current in pfc circuit, it is ensured that in high pressure.
It should be noted that the output voltage desired value set drives the negative of the pfc circuit as the pfc circuit
Carry the voltage value of normal work, that is, the rated voltage of load of the output voltage desired value set as the pfc circuit
Value, generally 420V or so.That is, the pfc circuit output voltage boost to the pfc circuit load volume
Before constant voltage value, the startup control device of the pfc circuit carries out current limliting to the input current of the pfc circuit always.
Optionally, as shown in Fig. 2, it is the structure diagram of the overcurrent protection module 13, the overcurrent protection module
13 may include current limiting unit 21 and switch unit 22, wherein；
The current limiting unit 21, for when the overcurrent protection module 13 receives the first control signal, to institute
The input current for stating pfc circuit carries out current limliting；
The switch unit 22, it is in parallel with the current limiting unit 21, for breaking when receiving the first control signal
It opens, is connected when receiving the second control signal.
Still optionally further, as shown in figure 3, the current limiting unit 21 may include one or more series connection and/or parallel connection
Resistance (Fig. 3 is by taking current limiting unit 21 includes the first resistor 31 of series connection and second resistance 32 as an example), the switch unit 22 can be by
Relay 33 is realized.
Wherein, control signal input mouth is connected with the control module 12, when control signal input mouth receives institute
When stating the first control signal of the output of control module 12, relay 33 disconnects, and power supply passes through 31 and second electricity of first resistor
Resistance 32 is powered for the pfc circuit；When control signal input mouth receives second control of the output of control module 12
During signal processed, relay 33 is attracted, and first resistor 31 and second resistance 32 are short-circuited, and power supply is directly powered for the pfc circuit.
It should be noted that the relay 33 can be supplied as the accessory power supply in the digital power where the pfc circuit
Electricity when the output voltage of the pfc circuit reaches the voltage threshold of setting (generally 100V or so), assists in digital power
Power supply plays machine, and accessory power supply provides electric energy for the relay 33, and details are not described herein for the present embodiment.
In addition, it is necessary to explanation, the switch unit 22 can also be by metal-oxide-semiconductor (Metal-oxide-semicondutor field-effect
Transistor, metal oxide semiconductor), IGBT (insulated gate bipolar transistor, Insulated Gate
Bipolar Transistor) etc. switching devices realize that the present embodiment is not limited in any way herein.
The control module 12 is additionally operable to when the startup control device of the pfc circuit powers on, to the overcurrent protection
Module 13 exports the first control signal.
That is, when the pfc circuit starts, the original state of the overcurrent protection module 13 is to described
The input current of pfc circuit carries out the state of current limliting, to avoid the pfc circuit overcurrent damage.
Optionally, the control module 12 is additionally operable to if it is determined that the output voltage values of the pfc circuit are less than the setting
Output voltage desired value, it is determined that between the output voltage values of the pfc circuit and the output voltage desired value of the setting
Difference；And PWM (pulse width modulation, the Pulse of switching device in the pfc circuit are controlled according to the difference
Width Modulation) signal duty ratio.
It should be noted that in the startup stage (boost phase) of pfc circuit, the output voltage values of pfc circuit are smaller, then
Difference between the input voltage of pfc circuit and the output voltage values of pfc circuit is bigger, then in the overcurrent protection module 13
The power that current limiting unit 21 is consumed is bigger, and the danger of 21 overcurrent damage of current limiting unit is higher；In order to further ensure that PFC electricity
The reliability on road can control the maximum duty cycle of the pwm signal of the switching device in pfc circuit to be not more than the duty ratio threshold of setting
Value, the power that the current limiting unit 21 in the overcurrent protection module 13 is consumed to be controlled to be not more than its maximum that can be born
Value；Further, the duty cycle threshold of the setting can be determined according to the output voltage values of pfc circuit, the output voltage of pfc circuit
Value is lower, and the duty cycle threshold of setting is smaller；The output voltage values of pfc circuit are higher, and the duty cycle threshold of setting is higher, this reality
Applying example, details are not described herein.
Still optionally further, the control module 12, available in the digital power where the pfc circuit is determined
After accessory power supply plays machine, the difference between the output voltage values of the pfc circuit and the output voltage desired value of the setting is determined
Value, and according to the duty ratio of the pwm signal of switching device in the difference control pfc circuit；The control module 12, also
Available in alternating voltage peak of the output voltage values for determining the pfc circuit not less than power supply, determining the pfc circuit
Output voltage values and the setting output voltage desired value between difference, and PFC electricity is controlled according to the difference
The duty ratio of the pwm signal of switching device in road.
That is, the control module 12 can play machine in the accessory power supply in the digital power where the pfc circuit
After (generally when the output voltage of the pfc circuit reaches 100V or so, accessory power supply plays machine in digital power), drive immediately
The pfc circuit sends out wave；Also it can reach the alternating voltage peak of power supply (generally in the output voltage for determining the pfc circuit
When 311V), the pfc circuit hair wave is driven.In addition, it is necessary to explanation, when the output voltage of the pfc circuit reaches described
After the output voltage desired value of setting, the pfc circuit normally sends out wave, and details are not described herein for the present embodiment.
Below will be by taking such as Fig. 4 as an example, the work to the startup control device of the pfc circuit provided in an embodiment of the present invention
Principle is described in detail：
1st, power supply electrifying (relay disconnection at this time), power supply are powered by current-limiting resistance R1 and R2 for pfc circuit；Meanwhile
Detection module acquires the voltage value of the output voltage of pfc circuit and is sent to control module in real time, and control module is according to receiving
The voltage value of output voltage of pfc circuit send out first control signal to relay；
2nd, when the output voltage of pfc circuit reaches the first setting voltage threshold (generally 100V or so), where pfc circuit
Digital power accessory power supply rise machine, provide electric energy for relay；Relay powers on and receives the first of control module transmission
Control signal remains open；
3rd, accessory power supply is risen after machine or the output voltage of pfc circuit reaches the second setting voltage threshold (alternating current of power supply
Voltage crest value, generally 311V) when, control module control pfc circuit driving hair wave；And control module is detected according to detection module
The voltage value of the output voltage of the pfc circuit arrived calculates the permission maximum duty cycle of the PWM wave of the switching device Q of pfc circuit,
And according to the duty ratio of the PWM wave for the switching device Q that maximum duty cycle is allowed to control pfc circuit being calculated；
4th, pfc circuit continuous voltage rise (output voltage of pfc circuit persistently increases)；
5th, control module determines that the output voltage for the pfc circuit that detection module detects reaches the output voltage target of setting
It is worth (such as 420V), sends out second control signal to relay, control relay is attracted, and current-limiting resistance R1 and R2 are short-circuited；
6th, power supply is directly powered for pfc circuit, and pfc circuit normally sends out wave.
In conclusion the startup control device of pfc circuit provided in an embodiment of the present invention, can detect the output of pfc circuit
Voltage；If it is determined that output voltage desired value of the output voltage values of the pfc circuit less than setting, then to the pfc circuit
Input current carries out current limliting；If it is determined that output voltage desired value of the output voltage values of the pfc circuit not less than setting, then eventually
Current limliting only is carried out to the input current of the pfc circuit.That is, the output voltage in pfc circuit boosts to the defeated of setting
Go out before voltage-target, the startup control device of pfc circuit carries out current limliting to the input current of pfc circuit always, can avoid
Due to output voltage and the input voltage of pfc circuit, there are starting current caused by larger voltage difference is excessive, circuit overheats
The problem of；Even if high pressure in short-term occurs in power-supply fluctuation, dash current will not occur in pfc circuit, it is ensured that the peace of pfc circuit
Full property and reliability.
It in addition, can also be in startup stage the opening in the output voltage values of pfc circuit control pfc circuit of pfc circuit
The maximum duty cycle of the pwm signal of device is closed, to limit the power that current limiting device is consumed, so as to further improve PFC electricity
The reliability on road.
Correspondingly, the embodiment of the present invention additionally provides a kind of pfc circuit, the startup control device including above-mentioned pfc circuit.
Embodiment two：
Based on same inventive concept, the embodiment of the present invention two provides a kind of startup control method of pfc circuit, can use
In the startup control to pfc circuit.Specifically, as shown in figure 5, its step flow for method described in the embodiment of the present invention two
Figure, the method may include：
Step 501：The output voltage for starting control device detection pfc circuit of pfc circuit；
Step 502：If it is determined that output voltage desired value of the output voltage values of the pfc circuit less than setting, then to institute
The input current for stating pfc circuit carries out current limliting；If it is determined that output voltage of the output voltage values of the pfc circuit not less than setting
Desired value then terminates and carries out current limliting to the input current of the pfc circuit.
That is, before the output voltage of pfc circuit boosts to the output voltage desired value of setting, pfc circuit
Start control device and current limliting is carried out to the input current of pfc circuit always, the output voltage due to pfc circuit and input can be avoided
Starting current caused by voltage has larger voltage difference is excessive, circuit overheat；Even if power-supply fluctuation occurs in short-term
The safety and reliability of pfc circuit will not occur dash current in pfc circuit, it is ensured that in high pressure.
Optionally, before the output voltage for starting control device detection pfc circuit of pfc circuit, the method may be used also
Including：The control device that starts of the pfc circuit carries out current limliting to the input current of the pfc circuit.
That is, before pfc circuit startup, you can overcurrent protection is carried out to the pfc circuit, to avoid institute
It states pfc circuit and the phenomenon that overcurrent damage occurs when powering on.
Optionally, the method may also include：
The pfc circuit starts control device if it is determined that the output voltage values of the pfc circuit are less than the setting
Output voltage desired value, it is determined that between the output voltage values of the pfc circuit and the output voltage desired value of the setting
Difference；
The duty ratio of the pwm signal of switching device in the pfc circuit is controlled according to the difference.
It should be noted that in the startup stage (boost phase) of pfc circuit, the output voltage values of pfc circuit are smaller, then
Difference between the input voltage of pfc circuit and the output voltage values of pfc circuit is bigger, then the startup control of the pfc circuit
The power that current limiting device in device is consumed is bigger, and the danger of current limiting device overcurrent damage is higher；In order to further ensure that
The reliability of pfc circuit can control maximum duty cycle the accounting for no more than setting of the pwm signal of the switching device in pfc circuit
Sky is than threshold value, the power that current limiting device is consumed to be controlled to be not more than its maximum value that can be born；Further, the setting
Duty cycle threshold can determine that the output voltage values of pfc circuit are lower according to the output voltage values of pfc circuit, the duty of setting
It is more smaller than threshold value；The output voltage values of pfc circuit are higher, and the duty cycle threshold of setting is higher, and details are not described herein for the present embodiment.
In addition, it is necessary to explanation, any number of elements in drawing and description be used to example and it is unrestricted and
Any name is only used for distinguishing, without any restrictions meaning.
It will be understood by those skilled in the art that the embodiment of the present invention can be provided as method, apparatus (equipment) or computer journey
Sequence product.Therefore, in terms of the present invention can be used complete hardware embodiment, complete software embodiment or combine software and hardware
The form of embodiment.Moreover, the calculating for wherein including computer usable program code in one or more can be used in the present invention
The computer program that machine usable storage medium is implemented on (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.)
The form of product.
The present invention be with reference to according to the method for the embodiment of the present invention, the flow chart of device (equipment) and computer program product
And/or block diagram describes.It should be understood that each flow in flowchart and/or the block diagram can be realized by computer program instructions
And/or the flow in box and flowchart and/or the block diagram and/or the combination of box.These computer programs can be provided to refer to
The processor of all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices is enabled to generate
One machine so that the instruction generation performed by computer or the processor of other programmable data processing devices is used to implement
The device of function specified in one flow of flow chart or multiple flows and/or one box of block diagram or multiple boxes.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that the instruction generation being stored in the computer-readable memory includes referring to
Enable the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one box of block diagram or
The function of being specified in multiple boxes.
These computer program instructions can be also loaded into computer or other programmable data processing devices so that counted
Series of operation steps are performed on calculation machine or other programmable devices to generate computer implemented processing, so as in computer or
The instruction offer performed on other programmable devices is used to implement in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know basic creation
Property concept, then additional changes and modifications may be made to these embodiments.So appended claims be intended to be construed to include it is excellent
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (8)
1. the startup control device of a kind of pfc circuit, which is characterized in that the startup control device of the pfc circuit includes detection
Module, control module and overcurrent protection module, wherein：
The detection module, for detecting the output voltage of pfc circuit；
The control module, for determine the output voltage values of the pfc circuit less than setting output voltage desired value when, to
The overcurrent protection module exports first control signal；Determine output of the output voltage values not less than setting of the pfc circuit
During voltage-target, second control signal is exported to the overcurrent protection module；
The overcurrent protection module is respectively connected with the output port of power supply and the input port of the pfc circuit, for
When receiving the first control signal, current limliting is carried out to the input current of the pfc circuit, is receiving second control
During signal, terminate and current limliting is carried out to the input current of the pfc circuit.
2. the startup control device of pfc circuit as described in claim 1, which is characterized in that the overcurrent protection module includes
Current limiting unit and switch unit, wherein；
The current limiting unit, for when the overcurrent protection module receives the first control signal, to the pfc circuit
Input current carry out current limliting；
The switch unit, it is in parallel with the current limiting unit, for being disconnected when receiving the first control signal, receiving
It is connected during to the second control signal.
3. the startup control device of pfc circuit as described in claim 1, which is characterized in that
The control module is additionally operable to when the startup control device of the pfc circuit powers on, defeated to the overcurrent protection module
Go out the first control signal.
4. the startup control device of pfc circuit as described in claim 1, which is characterized in that the control module is additionally operable to
If it is determined that the output voltage values of the pfc circuit are less than the output voltage desired value of the setting, it is determined that the PFC electricity
Difference between the output voltage values on road and the output voltage desired value of the setting；
The duty ratio of the pwm signal of switching device in the pfc circuit is controlled according to the difference.
5. a kind of pfc circuit, which is characterized in that include the startup control device of any pfc circuit of Claims 1 to 4.
6. a kind of startup control method of pfc circuit, which is characterized in that the method includes：
The output voltage for starting control device detection pfc circuit of pfc circuit；
If it is determined that output voltage desired value of the output voltage values of the pfc circuit less than setting, then to the defeated of the pfc circuit
Enter electric current and carry out current limliting；If it is determined that the output voltage values of the pfc circuit are then terminated not less than the output voltage desired value of setting
Current limliting is carried out to the input current of the pfc circuit.
7. method as claimed in claim 6, which is characterized in that start the defeated of control device detection pfc circuit in pfc circuit
Go out before voltage, the method further includes：The pfc circuit start control device to the input current of the pfc circuit into
Row current limliting.
8. method as claimed in claim 6, which is characterized in that the method further includes：
The pfc circuit starts control device if it is determined that the output voltage values of the pfc circuit are less than the output of the setting
Voltage-target, it is determined that the difference between the output voltage values of the pfc circuit and the output voltage desired value of the setting；
The duty ratio of the pwm signal of switching device in the pfc circuit is controlled according to the difference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710002745.5A CN108270350A (en) | 2017-01-03 | 2017-01-03 | A kind of startup control device and method of pfc circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710002745.5A CN108270350A (en) | 2017-01-03 | 2017-01-03 | A kind of startup control device and method of pfc circuit |
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| CN108270350A true CN108270350A (en) | 2018-07-10 |
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| CN201710002745.5A Pending CN108270350A (en) | 2017-01-03 | 2017-01-03 | A kind of startup control device and method of pfc circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111371306A (en) * | 2018-12-26 | 2020-07-03 | 致茂电子(苏州)有限公司 | Surge suppression module and power factor correction circuit with surge suppression function |
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| CN103036446A (en) * | 2011-09-30 | 2013-04-10 | 艾默生网络能源有限公司 | Soft starting device and method for high-power transformer |
| CN105553245A (en) * | 2015-09-10 | 2016-05-04 | 许继电源有限公司 | Soft start circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1801564A (en) * | 2005-01-08 | 2006-07-12 | 艾默生网络能源***有限公司 | Switching power supply with overvoltage protection and overvoltage protection method thereof |
| CN103036446A (en) * | 2011-09-30 | 2013-04-10 | 艾默生网络能源有限公司 | Soft starting device and method for high-power transformer |
| CN105553245A (en) * | 2015-09-10 | 2016-05-04 | 许继电源有限公司 | Soft start circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111371306A (en) * | 2018-12-26 | 2020-07-03 | 致茂电子(苏州)有限公司 | Surge suppression module and power factor correction circuit with surge suppression function |
| CN111371306B (en) * | 2018-12-26 | 2022-04-05 | 致茂电子(苏州)有限公司 | Surge suppression module and power factor correction circuit with surge suppression function |
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Application publication date: 20180710 |
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