CN207743755U - A kind of locking power supply uninterrupted power supply device - Google Patents
A kind of locking power supply uninterrupted power supply device Download PDFInfo
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- CN207743755U CN207743755U CN201721630151.0U CN201721630151U CN207743755U CN 207743755 U CN207743755 U CN 207743755U CN 201721630151 U CN201721630151 U CN 201721630151U CN 207743755 U CN207743755 U CN 207743755U
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Abstract
The utility model discloses a kind of locking power supply uninterrupted power supply devices, including：Filter module is connect with alternating current input power supplying and/or direct-current input power supplying respectively, and the alternating current or direct current exported to it carries out absorbing being filtered for electromagnetic interference, exports alternating current or direct current without electromagnetic interference.The second end of filter module is connect through the rectification module with the first end of the PFC module, and rectification module carries out DC voltage of the rectification processing output in the steamed bun waveform of envelope shape to the alternating current that filter module exports.PFC module to the DC voltage of the steamed bun waveform in envelope shape carry out power factor compensate, overlap-add procedure.The second end of PFC module is connected through double-end normal shock converter PWM modulation controller high frequency transformer and load, and load end exports direct current.The utility model has so that locking power supply uninterrupted power supply AC-DC two-way power supply, in the case where power outage occurs, normally operates high tension loop, it is ensured that equipment and the safety of related personnel.
Description
Technical field
The utility model is related to be latched power supply power supply technical field, more particularly to a kind of locking power supply uninterrupted power supply dress
It sets.
Background technology
Electric blocking is that the auxiliary contact of the equipment such as breaker, disconnecting switch, grounding switch is accessed related electric equipment
Operational power source circuit constitute locking, by open and close controlled device power supply achieve the purpose that forced blocking, to prevent accidentally point
(conjunction) breaker prevents on-load point (conjunctions) disconnecting switch, prevents electrification from closing earthing switch, preventing mistakenly entering charged chamber to closing again
It wants.Locked loop load is perception, and switch has larger overcurrent when opening and closing, and turn-to-turn short circuit easily occurs for blocking coil, therefore
It is very high to device reliability requirement, it need to be resistant to heavy current impact, and simultaneous with fabulous resistance to short circuit curve and EMC electromagnetism
Capacitive.
Direct current locking power supply is mounted in an important device in substation and switchyard ac panel, is that whole station is once high
The locked loop of equipment is pressed to provide power supply, it is most important to equipment and personal safety.The direct current blocking device used at this stage is
Alternating current 220V inputs, and direct current 110V outputs cannot be automatically brought into operation high-tension switch cabinet in the case of the alternating current dead electricity of station.
It, can be to high-tension switch cabinet when station is worked normally with alternating current since the locking power supply used at this stage is exchange single supply input
Normal operating is carried out, but cannot then be operated in station alternating current dead electricity.It in the case can only be by emergency management
It unlocks manually, needs separately to access DC power supply or destroy five-defence block device circuit to open cabinet door by force, reduce electric interlock
Reliability, threaten the safety of equipment and related personnel, and the accident treatment time can be delayed, therefore be highly desirable to the dress
Set carry out technological improvement.
Utility model content
The purpose of this utility model is to provide a kind of locking power supply uninterrupted power supply device, defeated by using AC-DC two-way
Enter, by ac panel AC power supply exchange input, direct current cabinet accumulator group supply direct current input, station with alternating current just
In the case of often, direct current input circuit is in stand-by state, does not consume DC loop power consumption, is cut automatically in the case of alternating current dead electricity
Change direct current supply, it is ensured that locked loop uninterrupted power supply.After exchange restores normal power supply, it is defeated that device automatically switches to exchange
Enter.To realize under normal and forced outage, normally high tension loop can be operated, treasured has been won for the processing of accident
The expensive time, it is ensured that the purpose of equipment and the safety of related personnel.
In order to achieve the goal above, the utility model is achieved through the following technical solutions：
A kind of locking power supply uninterrupted power supply device, including：Double electricity equipped with alternating current input power supplying and direct-current input power supplying
Source, filter module, rectification module, PFC module, double-end normal shock converter, PWM modulation controller and high frequency transformer.The filter
The first end of wave module is connect with the second end of alternating current input power supplying and/or direct-current input power supplying respectively, for the exchange
The alternating current or direct current of input power or direct-current input power supplying input carry out absorbing being filtered for electromagnetic interference, export nothing
The alternating current or direct current of electromagnetic interference.When dual power supply is direct-current input power supplying, the second end of the filter module directly with
The first end of the PFC module connects.When dual power supply is alternating current input power supplying, described in the second end warp of the filter module
Rectification module is connect with the first end of the PFC module, and the rectification module is used to carry out the alternating current that filter module exports
Rectification processing output is in the DC voltage of the steamed bun waveform of envelope shape.The PFC module is to the steamed bun waveform in envelope shape
DC voltage carry out power factor compensate, overlap-add procedure so that the power factor of the DC voltageOr
Person is less than 1；Or it is more than 1.The double-end normal shock converter for so that the output of direct current that correct through PFC correction modules and
Encourage same phase so that high frequency transformer resets.The PWM modulation controller is to the high frequency transformer primary side through the both-end
The transformed direct current of forward converter carries out pulsewidth modulation, and output waveform is a series of direct current of the equal-sized pulse of pulsewidths
Voltage.The secondary side of the high frequency transformer connect with the load of the DC output end and exports 110V direct currents.
Preferably, the PFC correction modules are equipped with a MOSFET pipe Q3, and PWM controller is connect with the PWM controller
Inductance L2, the PWM controller connect with the grid of the MOSFET pipes Q3, and the inductance L2 is through the PWM controller
The MOSFET pipes Q3 provides drive signal；The source electrode of the MOSFET pipes Q3 connects through the output plus terminal of inductance L1 and rectifier
It connects, drain electrode is connect with the output negative terminal of the rectifier；Capacitance C2, be connected in parallel on the rectifier output positive and negative terminal it
Between.In circuit start, the MOSFET pipes Q3 is connected, and the electric current being located in the inductance L on high frequency transformer pair side is linear
Increase, the energy stored in the inductance L1 increases, and rear class filtering capacitance C7 discharges to load RL.When the MOSFET pipes Q3 is cut
When only, the inductance L1 charges to capacitance C2, is superimposed with the DC voltage of the steamed bun waveform in envelope shape.
Preferably, the PFC correction modules are additionally provided with the thermistor RT1 of a negative temperature coefficient, are limited by short circuit RT1
Flow through the electric current of main circuit.
Preferably, the double-end normal shock converter includes the drain electrode of power switch tube Q1, source electrode and the high frequency change of Q2
The primary side winding of depressor is connected, and the drain electrode of the source electrode, Q2 of Q1 accesses on the positive and negative busbar of the PFC correction modules output end, institute
The grid for stating power switch tube Q1 and Q2 is connect by PWM generator with microcontroller；The microcontroller is generated to the PWM
Device exports PI Regulate signals, the conducting of driving power switching tube Q1 and Q2 and/or cut-off state.
Preferably, so the maximum turn-on time of double-end normal shock converter is the percent of the switch periods of power switch tube
50, conducting dutycycle is less than 50 the percent of switch periods.
The utility model compared with prior art, has the following advantages：
The utility model is inputted by using AC-DC two-way, by the AC power supply exchange input of ac panel, direct current
Screen accumulator group supply direct current input, station with alternating current under normal circumstances, direct current input circuit is in stand-by state, does not disappear
DC loop power consumption is consumed, automatically switches direct current supply in the case of alternating current dead electricity, it is ensured that locked loop uninterrupted power supply.And
DC loop has under-voltage protection function, cuts off direct current supply when less than backup battery group safe voltage, it is ensured that battery pack is not
Overdischarge occurs.After exchange restores normal power supply, device automatically switches to exchange input.Power supply uninterrupted power supply is latched to hand over
Direct current supplies power with double circuit, and under normal and forced outage, can normally be operated to high tension loop, is won for the processing of accident
Valuable time, it is ensured that equipment and the safety of related personnel.
Description of the drawings
Fig. 1 is a kind of power supply mode schematic diagram of locking power supply uninterrupted power supply device of the utility model；
Fig. 2 is a kind of circuit structure block diagram of locking power supply uninterrupted power supply device of the utility model；
Fig. 3 is a kind of structure diagram of locking power supply uninterrupted power supply device of the utility model；
Fig. 4 a~4e are a kind of work of the double-end normal shock converter of locking power supply uninterrupted power supply device of the utility model
Principle schematic.
Specific implementation mode
The utility model is done and is further explained by the way that a preferable specific embodiment is described in detail below in conjunction with attached drawing
It states.
As shown in figure 3, a kind of locking power supply uninterrupted power supply device of the utility model, including：Alternating current input power supplying, direct current
Input power, filter module, rectification module, PFC (power factor correction, PFC) module, both-end
Forward converter, PWM modulation controller, high frequency transformer, DC output end.
The first end of the filter module is connect with the second end of alternating current input power supplying and direct-current input power supplying respectively；It is described
Rectification module first end is connect with the second end of the filter module；The of the rectification module second end and the PFC module
One end connects, and the second end of the PFC module is connect with the first end of the double-end normal shock converter, the double-end normal shock transformation
The second end of device is connect with the first end of the PWM modulation controller；The second end of the PWM modulation controller and the high frequency
The primary side of transformer connects, and the secondary side of the high frequency transformer connect with the load of the DC output end and exports 110V direct currents
Electricity.
As shown in Figure 1, the direct-current input power supplying setting passes through cable via and the DC power supply in accumulator tank
Cabinet connection is fed, the DC power supply feed cabinet is equipped with the Power Reserve State for monitoring the direct-current input power supplying
System monitor, and status display is carried out by voltage provided therewith or current status indicator lamp groups V1~V3, A1~A3, work as institute
State direct-current input power supplying Power Reserve be in compared with low state when by equipped with AC/DC converters to the direct-current input power supplying
It charges.
As shown in Figure 1, being equipped with intelligent controller and dual power supply o controller, the direct current on the second ac panel
Source feed cabinet is additionally provided with a spare direct current output switch, is used for when alternating current input power supplying failure, intelligent controller combines
Dual power supply output controller controls direct-current input power supplying, to locking power supply supply DC current input.
As shown in Figure 1, being disposed with locking power supply on the first ac panel, it is connected by a breaker and alternating current input power supplying
It connects.
Station with alternating current under normal circumstances, direct current input circuit is in stand-by state, does not consume DC loop power consumption.Only
Have and automatically switch direct current supply in the case of alternating current dead electricity, it is ensured that locked loop uninterrupted power supply.And DC loop has
Under-voltage protection function, when less than backup battery group safe voltage, spare dc switch cuts off direct current supply, it is ensured that battery pack
Overdischarge does not occur.When exchange restore normal power supply after, intelligent controller combination dual power supply output controller controls its automatically
Switching utilizes alternating current input power supplying to locking power input alternating current.
In embodiment, the filter module uses high frequency E MC signal processors, when being latched power work, generates
VMOS pulse signals by network system, when system impedance is loaded with electrical equipment, needing rationally to handle electromagnetic interference, it is logical
It crosses high frequency EMC signal processors to absorb electromagnetic interference, will avoid active power balance device caused by other electric appliances
Electromagnetic interference.
The rectification module is the bridge arm type rectifier being mainly made of four switching tubes, for defeated to the filter module
Go out alternating current progress rectification and becomes direct current.
Due to being equipped with the power electronic equipment containing AC/DC converters in the locking power supply, and alternating current is rectified and big
It is the steamed bun waveform that more straight DC voltage is in envelope shape, rectifier, capacitor filtering electricity that direct current is obtained after capacitor filtering
Road is a kind of combination of non-linear component and energy storage component, therefore, although input ac voltage is sinusoidal, input AC electricity
Stream is the periodical peak current that a time is very short, peak value is very high, waveform Severe distortion.To solve the above-mentioned problems, described
Direct current of the PFC module for the steamed bun waveform later to rectification compensates, is superimposed the notch that can compensate steamed bun wave, only
Power conversion need to be carried out to the small part offset voltage in input power, output can be obtained by whole input powers, just
It can make power factorTend to 1.
In the present embodiment, direct current of the double-end normal shock converter for correct through PFC correction modules is defeated
Go out and encourages same phase, exactly in the switching tube conducting that double-end normal shock converter is equipped with, then above-mentioned high frequency transformer secondary output
Voltage.When switching tube is connected, when switching tube is connected, input feed is to load, and when cut-off, inductance supplies electricity to load.
The double-end normal shock converter has the shortcomings that overcome switching voltage stress in other converters high, each switching tube
Only it is subjected to input direct-current voltage, it is easier to select suitable power switch tube；Special magnetic reset circuit need not be used just
It can ensure the reliable magnetic reset of transformer.The switching tube of tandem working is operated in same-phase, and the danger of bridge arm direct pass is not present
Danger, reliability are high.Therefore double-end normal shock converter has the advantages that other converters are incomparable.Double-end normal shock converter again may be used
With by simultaneously, string combination the disadvantage opened up benefit scheme and its duty ratio can be overcome small, improve utilization rate and the transformation of transformer
The equivalent duty ratio of device is suitably applied the large-power occasions of high input and low output voltage.
The PWM modulation controller by switching on-off control to inverter circuit for being realized to the high frequency transformation
The direct current transformed through the double-end normal shock converter of device primary side carries out pulsewidth modulation.Output waveform is that a series of pulsewidths are big
The DC voltage of small equal pulse.
As shown in Fig. 2, the alternating current input power supplying is connected by the input terminal of a RC circuits and high frequency E MC signal processors
It connects, the output end of the high frequency E MC signal processors is connect with the input terminal of the rectifier；The direct-current input power supplying with it is right
The input terminal for the high frequency E MC signal processors answered is attached.The direct-current input power supplying and corresponding high frequency E MC signal processings
A capacitance in parallel between device.The output end for the high frequency E MC signal processors being connect with the direct-current input power supplying also with it is described whole
The input terminal of stream device is attached.The alternating current input power supplying input AC sinusoidal current, by high frequency E MC signal processors into
After row filtering, industrial frequency rectifying is carried out by rectifier described above, obtains the voltage signal of the steamed bun wave in envelope shape.
The voltage signal of the above-mentioned steamed bun wave in envelope shape carries out PFC to PFC correction modules described above
Processing, the output end of the rectifier are connect with the input terminal of the PFC correction modules, and the circuit of the PFC correction modules is set
There are the capacitance in parallel with the output end of the rectifier, a PWM controllers, a MOSFET pipes Q3.The PWM controller is in electricity
Control MOSFET pipes Q3 conductings while road starts, the electric current being at this moment located in the inductance L on high frequency transformer pair side linearly increase
Add, the energy stored in inductance L1 also increases, and at the same time rear class filtering capacitance CR is also to load RL electric discharges.As MOSFET pipes Q3
When cut-off, the storage energy in inductance L1 charges to C2, and the later voltage superposition with rectification, an inverted steamed bun wave is just folded
It is added on positive steamed bun wave, because both descriptive geometry areas are complementary, the output voltage U at the ends load RL0It is defeated
Go out to be equal to 1,The circuit biggest advantage is：The small part of input power is only carried out power conversion, and
Most of power of input terminal is not into practical conversion, and directly reaching output end becomes output power, and efficiency can be considered 100%.
The drive signal of MOSFET pipes Q3 is provided using common PWM chip by the another way winding of auxiliary power supply inductance L2.
In the present embodiment, the rectifier is the DC voltage that the uncontrollable rectification of three-phase becomes alternating current pulsation, then
The more smooth DC voltage of waveform compared with becoming with the combination of C1-C6 through inductance L1.Since the electric current on inductance L1 cannot dash forward
Become the pulse ripple come on smooth each capacitance C1-C6, improves the distortion of line current waveform, the voltage leading current on inductance L1
The characteristics of characteristic compensation filter capacitor C1-C6 electric current leading voltages so that power factor, electromagnetic compatibility, electromagnetic interference is changed
It is kind.Wherein connect with inductance L1 the thermistor RT1 of a negative temperature coefficient, and metering function is played in circuit start, starts
SCR triggering and conductings after completing, short circuit RT1 reduce line loss.
In conjunction with shown in Fig. 2 and Fig. 4 a~4e, drain electrode of the double-end normal shock converter equipped with power switch tube Q1, Q2 source
Pole is connected with the primary side winding of high frequency transformer, and the drain electrode of the source electrode, Q2 of Q1 accesses the positive and negative of the PFC correction modules output end
On busbar.The grid of the Q1 and Q2 is connect by PWM generators with microcontroller；The RC absorption circuits of power switch tube Q1,
The RC absorption circuits of power switch tube Q2, D1, D2 are catching diode, the absorption of high frequency transformer primary side winding, high frequency transformation
Device vice-side winding connects rectifier diode D3 and fly-wheel diode to D4, and rear class is made of output reactance device L filter capacitors C
LC filter networks, the power switch tube Q1 and Q2 are in parallel, and the working condition of specific power switch tube Q1, Q2 is as follows：
The working condition of power switch tube Q1, Q2 is carried out by the microcontroller being equipped in the present apparatus in the present embodiment
Control, the microcontroller export PI Regulate signals, that is, power switch tube Q1, Q2 drive signal to the PWM generator.
T is driven in power switch tube Q1, Q20Before moment, high frequency transformer, which has resetted, to be finished, on each switching tube
Voltage is the half of input voltage, and load RL electric currents are connected from sustained diode 4.In t0Finish time, power switch tube Q1 and
Q2 obtains trigger pulse and open-minded simultaneously, and the electric current for flowing through sustained diode 4 starts to the rectifier diode D3 changes of current, the change of current
Speed is limited by high frequency transformer leakage inductance.
In the t of power switch tube Q1, Q2 conducting1The electric current at moment, rectifier diode D3 rises to output inductor L electricity
Stream, the change of current terminate.Shown in the following Fig. 4 a of equivalent circuit of this commutation course, in this state, input terminal is not carried to output end
For energy, because the electric current on inductance L is completely set up not yet.
In t1Moment inductance L electric current establishes high frequency transformer pair side sustained diode 4 and the change of current of rectifier diode D3
Terminate, sustained diode 4 is ended, and above-mentioned double-end normal shock converter starts to transmit energy to load RL, in output inductor L
Electric current input, output voltage under the action of linear rise.This state is continued until t2Moment, switch Q1 and Q2 are closed simultaneously
It is disconnected.The equivalent circuit of this state is as shown in Figure 4 b, and the duration is determined by the operative duty cycles of double-end normal shock converter.
In t2Moment, switch Q1 and Q2 are simultaneously turned off, and are equivalent to power switch tube Q1 and Q2 and are ended, high frequency transformer primary side
Clamp diode D1 and D2 conducting, voltage on power switch tube Q1 and Q2 by it is clamped be input voltage, high frequency transformer is former
Side adds negative voltage, and under the action of the negative voltage, the electric current of rectifier diode D3 is to 4 change of current of sustained diode, the speed of the change of current
Degree is limited by input voltage and high frequency transformer leakage inductance.The state continues to t3Moment, the change of current terminate, equivalent circuit such as Fig. 4 c
It is shown.
In t3Moment, the side change of current of high frequency transformer pair terminate, and sustained diode 4 is connected, rectifier diode D3 cut-offs.
High frequency transformer primary side is resetted by clamp diode D1 and D2, this state is continued until t4Moment high frequency transformer has resetted
Finish.The equivalent circuit circuit of this state is as shown in figure 4d.
In t4Moment, high frequency transformer reset finish, and the voltage on power switch tube Q1 and Q2 drops to the input of half
Voltage, on high frequency transformer pair side, double-end normal shock converter maintains load RL electric currents by sustained diode 4.This state one
Directly continue to t5Moment, new switch periods start.The equivalent circuit of this state is as shown in fig 4e.
Voltage magnitude due to during high frequency transformer resets, being added in high frequency transformer primary side is passed with forward energy
The voltage magnitude that high frequency transformer primary side is added in when passing is equal, direction on the contrary, the feedback time of magnetizing inductance storing energy be equal to
Forward energy passing time, so the maximum turn-on time of double tube positive exciting circuit is 50 the percent of switch periods, it is reliable
For the sake of, conducting dutycycle also should be less than 50 percent, and otherwise high frequency transformer is unable to reliable reset, will cause high frequency transformer
Saturation.
As shown in Fig. 2, the microcontroller control sampling network samples output voltage and output current, pass through
The voltage comparison amplifier and compensating end of the microcontroller control circuit.When overtension or too low
When, voltage error amplifier output generate variation, and with the output of current error amplifier generation compare when, produced by PWM
When raw device, the switch time of inverter bridge is controlled by adjusting internal clock frequency and duty ratio, to reach high-precision output
The control purpose of voltage.
In conclusion the utility model proposes one kind having AC-DC two-way input, the uninterrupted work of locked loop can be achieved
The novel closure power supply uninterrupted power supply device of work, uses high speed MCU microcontroller C8051F410 chips in order to control for core,
Major loop is using PWM tune such as reliability high single-ended pair transistor normal shocks and phase-shifting resonance zero-voltage zero-current soft switch technology
Scheme processed using MOSFET and IGBT as switch executing element, and with overvoltage, overcurrent, short-circuit protection function, meets electricity
Magnetic compatibility professional standard.It, can be under normal and forced outage after being latched power supply uninterrupted power supply device using this set
High tension loop is operated, has won valuable time for the processing of accident, it is ensured that equipment and the safety of related personnel have
Considerable economic results in society.
Although the content of the utility model is discussed in detail by above preferred embodiment, but it should be appreciated that on
The description stated is not considered as limitations of the present invention.After those skilled in the art have read the above, for
A variety of modifications and substitutions of the utility model all will be apparent.Therefore, the scope of protection of the utility model should be by appended
Claim limit.
Claims (5)
1. a kind of locking power supply uninterrupted power supply device, which is characterized in that include：
Dual power supply, filter module, rectification module, PFC module, both-end equipped with alternating current input power supplying and direct-current input power supplying are just
Exciting converter, PWM modulation controller and high frequency transformer；
The first end of the filter module is connect with the second end of alternating current input power supplying and/or direct-current input power supplying respectively, is used for
The alternating current or direct currents that inputted to the alternating current input power supplying or direct-current input power supplying absorb the filtering of electromagnetic interference
Processing exports alternating current or direct current without electromagnetic interference；
When dual power supply is direct-current input power supplying, the second end of the filter module directly connects with the first end of the PFC module
It connects；
When dual power supply is alternating current input power supplying, the second end of the filter module is through the rectification module and the PFC module
First end connection, it is in envelope shape that the alternating current that the rectification module is used to export filter module, which carries out rectification processing output,
The DC voltage of steamed bun waveform；
The PFC module carries out power factor to the DC voltage of the steamed bun waveform in envelope shape and compensates, at superposition
Reason so that power factor COS=1 of the DC voltage；Or it is less than 1；Or it is more than 1；
The output of direct current of the double-end normal shock converter for correct through PFC correction modules and the same phase of excitation so that
High frequency transformer resets；
Through the double-end normal shock converter transformed direct current of the PWM modulation controller to the high frequency transformer primary side
Pulsewidth modulation is carried out, output waveform is a series of DC voltage of the equal-sized pulse of pulsewidths；
The secondary side of the high frequency transformer and the load of DC output end connect and export 110V direct currents.
2. locking power supply uninterrupted power supply device as described in claim 1, which is characterized in that
The PFC correction modules are equipped with a MOSFET pipe Q3, PWM controller, the inductance L2 being connect with the PWM controller, institute
It states PWM controller to connect with the grid of the MOSFET pipes Q3, the inductance L2 is managed through the PWM controller for the MOSFET
Q3 provides drive signal；The source electrode of the MOSFET pipes Q3 is connected through the output plus terminal of inductance L1 and rectifier, drain electrode and institute
State the output negative terminal connection of rectifier；Capacitance C2 is connected in parallel between the output positive and negative terminal of the rectifier；
In circuit start, the MOSFET pipes Q3 conductings, the current line being located in the inductance L on high frequency transformer pair side
Property increase, the energy stored in the inductance L1 increases, and rear class filtering capacitance C7 is to load RL electric discharges；
When the MOSFET pipes Q3 ends, the inductance L1 charges to capacitance C2, with the steamed bun waveform in envelope shape
DC voltage is superimposed.
3. locking power supply uninterrupted power supply device as claimed in claim 2, which is characterized in that
The PFC correction modules are additionally provided with the thermistor RT1 of a negative temperature coefficient, flow through main circuit by short circuit RT1 limitations
Electric current.
4. locking power supply uninterrupted power supply device as described in claim 1, which is characterized in that
The double-end normal shock converter include the drain electrode of power switch tube Q1, Q2 source electrode and the high frequency transformer primary side around
The drain electrode of group series connection, the source electrode, Q2 of Q1 accesses on the positive and negative busbar of the PFC correction modules output end, the power switch tube
The grid of Q1 and Q2 is connect by PWM generator with microcontroller；The microcontroller is adjusted to PWM generator output PI
Signal, the conducting of driving power switching tube Q1 and Q2 and/or cut-off state.
5. locking power supply uninterrupted power supply device as claimed in claim 4, which is characterized in that
So the maximum turn-on time of double-end normal shock converter is 50 the percent of the switch periods of power switch tube, conducting accounts for
Sky is than 50 percent less than switch periods.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721630151.0U CN207743755U (en) | 2017-11-29 | 2017-11-29 | A kind of locking power supply uninterrupted power supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721630151.0U CN207743755U (en) | 2017-11-29 | 2017-11-29 | A kind of locking power supply uninterrupted power supply device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207743755U true CN207743755U (en) | 2018-08-17 |
Family
ID=63116384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721630151.0U Active CN207743755U (en) | 2017-11-29 | 2017-11-29 | A kind of locking power supply uninterrupted power supply device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207743755U (en) |
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2017
- 2017-11-29 CN CN201721630151.0U patent/CN207743755U/en active Active
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