CN109039051A - A kind of power supply unit of cascade bus power supply - Google Patents
A kind of power supply unit of cascade bus power supply Download PDFInfo
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- CN109039051A CN109039051A CN201811044053.8A CN201811044053A CN109039051A CN 109039051 A CN109039051 A CN 109039051A CN 201811044053 A CN201811044053 A CN 201811044053A CN 109039051 A CN109039051 A CN 109039051A
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- 238000012937 correction Methods 0.000 claims abstract description 32
- 238000001914 filtration Methods 0.000 claims abstract description 15
- 239000003990 capacitor Substances 0.000 claims description 85
- 239000004065 semiconductor Substances 0.000 claims description 50
- 238000004804 winding Methods 0.000 claims description 40
- 238000004146 energy storage Methods 0.000 claims description 20
- 230000005611 electricity Effects 0.000 claims description 14
- 230000000087 stabilizing effect Effects 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 8
- 230000001360 synchronised effect Effects 0.000 claims description 8
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- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000011835 investigation Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 5
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- 230000033228 biological regulation Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
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- 238000012546 transfer Methods 0.000 description 1
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
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
- H02M1/4208—Arrangements for improving power factor of AC input
- H02M1/4241—Arrangements for improving power factor of AC input using a resonant converter
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
- H02H5/042—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature using temperature dependent resistors
-
- 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
-
- 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33523—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
-
- 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
- H05K7/20909—Forced ventilation, e.g. on heat dissipaters coupled to components
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention belongs to switch power technology fields, disclose a kind of power supply unit of cascade bus power supply, including current rectifying and wave filtering circuit, circuit of power factor correction and resonant mode DC/DC isolated variable circuit；It further include fan control circuitry and initiative alarming circuit；Fan control circuitry includes the first triode of the size of current of the DC power supply for providing power supply for fan, control direct-current power supply fan and controls the base current control circuit of the size of current of the first transistor base according to environment temperature；Initiative alarming circuit includes alarm, the switch that control alarm is disconnected or connect with DC power supply and the ON-OFF control circuit being opened and closed according to the progress charge and discharge of the pwm signal of resonant mode DC/DC isolated variable circuit with control switch.The invention enables fan start and stop and speed to change according to environment temperature, to extend the service life of fan；When this power supply unit breaks down, it can be quickly positioned, greatly facilitate the investigation of failure.
Description
Technical field
The invention belongs to switch power technology fields, and in particular to a kind of power supply unit of cascade bus power supply.
Background technique
Power supply is the important component of various electronic equipments, it like human body heart, just for all electric class equipment
Often operation provides power.With the fast development of various electronic equipments, electric appliance, the quality power stable to high efficiency, performance
There is great demand.And Switching Power Supply is set with small-sized, light weight and efficient the feature almost all of electronics that is widely used
It is standby, it is that current electronics and information industry develops rapidly a kind of indispensable power mode.But in such as space station, base station, calculating
Machine server etc. needs in high-power, high-precision uninterrupted power supply power-supply system occasion, and single switch power supply can not
Meet the normal power supply demand of equipment.The important of high-power distributed generation resource is had become using the technology of multiple switch power sources in parallel
Component part.
But the single switch power supply in existing high-power distributed generation resource does not have fault alarm function, breaks down at it
Afterwards, extremely inconvenient investigation failure；Also, the fan of each Switching Power Supply cannot carry out depending on changes in ambient temperature start and stop or
Speed regulation, highly shortened the service life of fan.
Summary of the invention
In order to solve the above problems existing in the present technology, it is an object of that present invention to provide a kind of confessions of cascade bus power supply
Answer device.The present invention is by setting fan control circuitry, so that fan start and stop and speed change according to environment temperature, to extend
The service life of fan；Secondly, the present invention by setting initiative alarming circuit, when this power supply unit breaks down, can quickly be determined
Position, greatly facilitates the investigation of failure.
The technical scheme adopted by the invention is as follows:
A kind of power supply unit of cascade bus power supply, comprising: alternating current is filtered to and is rectified into the rectification filter of parabolic voltage
Wave circuit；The parabolic voltage exported from current rectifying and wave filtering circuit progress PFC is obtained into the power factor of DC voltage
Correcting circuit；And the resonance for DC/DC isolated variable being carried out by the DC voltage of circuit of power factor correction output
Formula DC/DC isolated variable circuit；
It further include fan control circuitry and initiative alarming circuit；The fan control circuitry includes providing for the fan
The DC power supply of power supply, control direct-current power supply fan size of current the first triode and controlled according to environment temperature
The base current control circuit of the size of current of first transistor base；
The initiative alarming circuit include alarm, the control alarm switch that disconnects or connect with the DC power supply with
And charge and discharge are carried out to control the switch opening and closing according to the pwm signal of the resonant mode DC/DC isolated variable circuit
ON-OFF control circuit.
Further, the circuit of power factor correction include power factor correction controller, the first pipe, energy storage inductor,
First diode, the second diode, first capacitor and the second capacitor；The source electrode of first pipe is grounded, the drain electrode of the first pipe
It is connect respectively with the anode of one end of energy storage inductor and first diode；The sun of the other end of energy storage inductor and the second diode
Pole connection；The cathode of second diode is connect with one end of the cathode of first diode, first capacitor and the second capacitor respectively；
The other end of first capacitor and the second capacitor is grounded；The cathode of second diode, the cathode of first diode, first
Voltage feedback circuit is connected between capacitor and the binding site and power factor correction controller of the second capacitor；The power because
It is connected with current feedback circuit between number correcting controller and the drain electrode of the first pipe, power factor correction controller is connected with driving
First driving circuit of the first pipe on or off, between power factor correction controller and the auxiliary winding of energy storage inductor
It is connected with the energy release detection circuit of detection energy storage inductor energy.
Further, the power factor correction controller is connected with the first thermal-shutdown circuit；First excess temperature is protected
Protection circuit includes first resistor, second resistance, third diode, the first thermistor, 3rd resistor and third capacitor；It is described
One end of first resistor is connect with current rectifying and wave filtering circuit, and the other end of first resistor successively passes through second resistance, third diode
Anode, the cathode of third diode, be grounded after the first thermistor and 3rd resistor；One end of the third capacitor and the
The cathode of three diodes connects, the other end ground connection of third capacitor；The anode of the third diode and the combination of second resistance
Point is connect with the power factor correction controller.
Further, the resonant mode DC/DC isolated variable circuit include resonant mode DC power supply switching controller,
Second pipe, third pipe, inductance, the 4th capacitor, transformer, synchronous rectification drive control device, the 4th pipe, the 5th pipe, the 7th capacitor
And the 6th resistance；The drain electrode of second pipe and the cathode of first diode connect；The source electrode of the third pipe is grounded, third
The binding site of source electrode of the drain electrode and the second pipe of pipe and one end of inductance connect；The other end of inductance and the primary side winding of transformer
Same Name of Ends connection；The different name end of the primary side winding of one end and transformer of the 4th capacitor connects, another termination of the 4th capacitor
Ground；The resonant mode DC power supply switching controller is connected separately with the second driving electricity of driving the second pipe on or off
Second driving circuit of road and the driving third pipe on or off；The drain electrode of 4th pipe is successively by transformer
The Same Name of Ends of first vice-side winding, the different name end of the first vice-side winding of transformer, transformer the second vice-side winding it is of the same name
It holds, connect behind the different name end of the second vice-side winding of transformer with the drain electrode of the 5th pipe；The source electrode and the 5th of 4th pipe
The source grounding of pipe；The 4th resistance and the 5th capacitor are connected in turn between the source electrode and drain electrode of the 4th pipe；Described
The 5th resistance and the 6th capacitor are connected in turn between the source electrode and drain electrode of five pipes；The synchronous rectification drive control device connects respectively
The 5th for being connected to the 4th driving circuit for driving the 4th pipe on or off and driving the 5th pipe on or off drives
Dynamic circuit；The binding site of the Same Name of Ends of second vice-side winding at the different name end and transformer of the first vice-side winding of transformer is successively
It is grounded after the 7th capacitor and the 6th resistance；The binding site of 7th capacitor and the 6th resistance ground connection.
Further, the resonant mode DC power supply switching controller is connected with the second thermal-shutdown circuit；Described second
Thermal-shutdown circuit include the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, eleventh resistor, the second thermistor,
8th capacitor, the second triode and third transistor；The collector of the third transistor successively passes through the 8th resistance, the 9th
It is connect after resistance, the tenth resistance and the second thermistor with the base stage of third transistor；The emitter of third transistor is grounded；
The collector of third transistor is connect with the binding site of the 8th resistance with resonant mode DC power supply switching controller；8th resistance and
The binding site of 9th resistance is connect with the base stage of the second triode；The binding site of 9th resistance and the tenth resistance is respectively with the two or three
The emitter of pole pipe is connected with resonant mode DC power supply switching controller；The both ends of 7th resistance respectively with third transistor
Base stage connected with the collector of the second triode；One end of the eleventh resistor and the base stage of third transistor connect, separately
One end ground connection；One end of 8th capacitor and the base stage of third transistor connect, other end ground connection.
Further, the DC power supply includes voltage stabilizing chip；The input terminal of the voltage stabilizing chip and the first vice-side winding
Different name end connected with the binding site of the Same Name of Ends of the second vice-side winding of transformer, the output end of voltage stabilizing chip and described first
Triode connection.
Further, the resonant mode DC power supply switching controller and resonant mode DC/DC isolated variable electricity
Feedback of voltage and current circuit is connected between the output end on road.
Further, the base current control circuit includes third thermistor, the 4th thermistor, the 12nd electricity
Resistance, thirteenth resistor, the 9th capacitor, the tenth capacitor and the 4th triode；The DC power supply successively passes through the 4th temperature-sensitive electricity
It is grounded after resistance and thirteenth resistor；The base stage of 4th thermistor and the binding site of thirteenth resistor and the 4th triode connects
It connects；The emitter of 4th triode is grounded；The both ends of the third thermistor collector and the one or three with the 4th triode respectively
The base stage of pole pipe connects；The emitter of first triode is connect with DC power supply, and the collector and fan of the first triode are just
Pole connection；Twelfth resistor is in parallel with third thermistor；One end of tenth capacitor is connect with the base stage of the 4th triode, another
End ground connection；One end of 9th capacitor is connect with the collector of the first triode, other end ground connection.
Further, the resonant mode DC power supply switching controller is connect with power factor correction controller, described
When resonant mode DC power supply switching controller detects that the output power of the power supply unit is smaller, convert resonant mode DC power supply
Controller and power factor correction controller linkage enter low power operation mode.
Further, output is connected between the resonant mode DC power supply switching controller and the auxiliary winding of transformer
Voltage detecting circuit, so that the power supply unit executes overvoltage protection.
The invention has the benefit that
The present invention is by setting fan control circuitry, so that fan start and stop and speed change according to environment temperature, thus
Extend the service life of fan；Secondly, the present invention can be fast when this power supply unit breaks down by setting initiative alarming circuit
Speed positioning, greatly facilitates the investigation of failure；Also, the present invention passes through the first thermal-shutdown circuit of setting and the second excess temperature
Circuit is protected, the risk in the service life of ambient temperature effect this power supply unit is significantly reduced, greatly improves this power supply unit
Reliability.
Detailed description of the invention
Fig. 1 be current rectifying and wave filtering circuit in a kind of power supply unit of cascade bus power supply of the invention, surge current suppression circuit,
The circuit theory schematic diagram of differential mode filter circuit, circuit of power factor correction and the first thermal-shutdown circuit；
Fig. 2 is resonant mode DC/DC isolated variable circuit in a kind of power supply unit of cascade bus power supply of the invention
Circuit theory schematic diagram；
Fig. 3 is the circuit theory signal of the second thermal-shutdown circuit in a kind of power supply unit of cascade bus power supply of the invention
Figure；
Fig. 4 is the circuit theory schematic diagram of fan control circuitry in a kind of power supply unit of cascade bus power supply of the invention；
Fig. 5 is the circuit theory signal of feedback of voltage and current circuit in a kind of power supply unit of cascade bus power supply of the invention
Figure；
Fig. 6 is the circuit theory schematic diagram of DC power supply in a kind of power supply unit of cascade bus power supply of the invention；
Fig. 7 is the circuit theory schematic diagram of initiative alarming circuit in a kind of power supply unit of cascade bus power supply of the invention.
Specific embodiment
With reference to the accompanying drawing and specific embodiment does further explaination to the present invention.
Embodiment 1:
As shown in figs. 1-7, the present embodiment provides a kind of power supply units of cascade bus power supply, comprising: simultaneously by alternating current filtering
It is rectified into the current rectifying and wave filtering circuit of parabolic voltage；The parabolic voltage exported from current rectifying and wave filtering circuit is subjected to power factor school
Just obtaining the circuit of power factor correction of DC voltage；And it will be carried out by the DC voltage of circuit of power factor correction output
The resonant mode DC/DC isolated variable circuit of DC/DC isolated variable；Alternating current is processed into throwing by current rectifying and wave filtering circuit
Object wave voltage, circuit of power factor correction handle parabolic voltage for 390V DC voltage；The isolation of resonant mode DC/DC becomes
It changes circuit and 390V DC voltage is processed into 36V bus voltage.Preferably, as shown in Figure 1, the power supply unit in the present embodiment also wraps
Include the surge current suppression circuit being sequentially connected between the current rectifying and wave filtering circuit and circuit of power factor correction and differential mode filtering
Circuit.
In the present embodiment, controller further includes fan control circuitry and initiative alarming circuit；The fan control circuitry
Including providing the first triode of the DC power supply of power supply, the size of current for controlling direct-current power supply fan for the fan
The base current control circuit of Q13 and the size of current according to environment temperature the first triode Q13 base stage of control；Specifically,
As shown in figure 4, the base current control circuit includes third thermistor RT3, the 4th thermistor RT4, twelfth resistor
R82, thirteenth resistor R72, the 9th capacitor C46, the tenth capacitor C51 and the 4th triode Q14；The DC power supply successively passes through
It is grounded after crossing the 4th thermistor RT4 and thirteenth resistor R72；The binding site of 4th thermistor RT4 and thirteenth resistor R72
It is connect with the base stage of the 4th triode Q14；The emitter of 4th triode Q14 is grounded；The both ends of third thermistor RT3
It is connect respectively with the base stage of the collector of the 4th triode Q14 and the first triode Q13；The emitter of first triode Q13 with
DC power supply connection, the collector of the first triode Q13 and the anode of fan connect；Twelfth resistor R82 and third temperature-sensitive electricity
It is in parallel to hinder RT3；One end of tenth capacitor C51 is connect with the base stage of the 4th triode Q14, other end ground connection；9th capacitor C46's
One end is connect with the collector of the first triode Q13, other end ground connection.The working principle of fan control circuitry is, when extraneous temperature
When degree is lower than setting value, the resistance value of the 4th thermistor RT4 is higher, and the 4th triode Q14 is caused to be in off state, so that the
One triode Q13 is also at off state, so that fan stops working；When ambient temperature gradually rises, the 4th thermistor
The resistance value of RT4 is gradually reduced, so that the 4th triode Q14 is in the conductive state, and then the first triode Q13 is connected, and fan has
Electric current driving, starts to work, and with the further raising of ambient temperature, the resistance value of third thermistor RT3 is gradually reduced, so that
The base current of first triode Q13 is gradually increased, so that the revolving speed of fan increases, achievees the purpose that radiate immediately.Preferably,
As shown in figure 4, being connected with the 14th resistance between the collector of the first triode Q13 and the base stage of the 4th triode Q14
R73。
Initiative alarming circuit in the present embodiment include alarm, control alarm disconnect or connect with the DC power supply
Switch and charge and discharge are carried out to control described open according to the pwm signal of the resonant mode DC/DC isolated variable circuit
Close the ON-OFF control circuit of opening and closing.Specifically, initiative alarming circuit is realized using circuit shown in Fig. 7, its working principle is that: when
When power supply unit works normally, ON-OFF control circuit is by capacitor C100 charge and discharge, and the resistance by the way that reasonable resistance R100 is arranged
Value makes the charging current of capacitor C100 much smaller than its discharge current, therefore the voltage of capacitor C100 is always in lower range
Fluctuation, when capacitor C100 discharges, discharge voltage passes through R101, and R102 partial pressure can not be such that triode Q10 is connected, alarm BZ1
It can not power alarm.When power supply unit breaks down, the pwm signal of power supply unit will stop exporting, and VD2 is equal to bus direct current at this time
Voltage 36V, bus DC voltage are charged by resistance R100 to capacitor C100, and the voltage of capacitor C100 is made to be equal to bus direct current
36V is pressed, the voltage of capacitor C100 passes through R101, the base stage of triode Q10 is output to after R102 partial pressure, triode Q10 is connected,
Alarm BZ1 powers alarm, and finding out and issuing the alarm BZ1 of alarm is the power supply unit to break down.Alarm BZ1 can be adopted
It is realized with existing buzzer and light emitting diode etc..DC power supply can be realized using the prior art, such as battery.Such as figure
Shown in 6, the DC power supply in the present embodiment includes voltage stabilizing chip；The input terminal of the voltage stabilizing chip is different with the first vice-side winding
Name end is connected with the binding site of the Same Name of Ends of the second vice-side winding of transformer T1, the output end of voltage stabilizing chip and the described 1st
Pole pipe Q13 connection.The 36V bus voltage that voltage stabilizing chip exports the output end of resonant mode DC/DC isolated variable circuit is steady
Pressure is converted to the DC power supply of 12V.Voltage stabilizing chip can be realized using the prior art, such as can use model LM2576's
Voltage stabilizing chip is realized.
As shown in Figure 1, the circuit of power factor correction in the present embodiment includes power factor correction controller U1, first
Metal-oxide-semiconductor Q2, energy storage inductor L1A, first diode D3, the second diode D2, first capacitor C3 and the second capacitor C4；Described
The source electrode of one metal-oxide-semiconductor Q2 is grounded, the drain electrode of the first metal-oxide-semiconductor Q2 respectively with one end of energy storage inductor L1A and first diode D3
Anode connection；The other end of energy storage inductor L1A is connect with the anode of the second diode D2；The cathode of second diode D2 is distinguished
It is connect with one end of the cathode of first diode D3, first capacitor C3 and the second capacitor C4；The electricity of first capacitor C3 and second
The other end for holding C4 is grounded；The cathode of the second diode D2, the cathode of first diode D3, first capacitor C3 and
Voltage feedback circuit is connected between the binding site and power factor correction controller U1 of two capacitor C4；The PFC
Current feedback circuit is connected between controller U1 and the drain electrode of the first metal-oxide-semiconductor Q2, power factor correction controller U1 is connected with
Drive the first driving circuit of the first metal-oxide-semiconductor Q2 on or off, power factor correction controller U1 and energy storage inductor L1A
Auxiliary winding L1B between be connected with detection energy storage inductor L1A energy energy release detection circuit.Power Factor Correction Control
Device U1 uses service time control technology, calculates first according to the feedback signal of voltage feedback circuit and current feedback circuit
Metal-oxide-semiconductor Q2 needs the time be connected, and the first metal-oxide-semiconductor Q2 is connected in output pwm control signal, thus the shape on energy storage inductor L1A
After closing its energy storage, the first metal-oxide-semiconductor Q2 at electric current, energy storage inductor L1A releases energy by first diode D3 to the first electricity
Hold C3 charging；Induced voltage judgement on the auxiliary winding L1B that power factor correction controller U1 passes through detection energy storage inductor L1A
Whether energy all discharges and controls the first metal-oxide-semiconductor Q2 and be connected again stored by energy storage inductor L1A.Preferably, as shown in Figure 1,
The power factor correction controller U1 is connected with the first thermal-shutdown circuit；First thermal-shutdown circuit includes the first electricity
Hinder R1, second resistance R2, third diode D10, the first thermistor RT2,3rd resistor R3 and third capacitor C6；Described
One end of one resistance R1 is connect with current rectifying and wave filtering circuit, and the other end of first resistor R1 successively passes through second resistance R2, the three or two
It is grounded after the anode of pole pipe D10, the cathode of third diode D10, the first thermistor RT2 and 3rd resistor R3；Described
One end of three capacitor C6 is connect with the cathode of third diode D10, the other end ground connection of third capacitor C6；The third diode
The anode of D10 and the binding site of second resistance R2 are connect with the power factor correction controller U1.Power in the present embodiment
The model TEA19162T of factor correcting controller U1.
As shown in Fig. 2, the resonant mode DC/DC isolated variable circuit in the present embodiment includes that resonant mode DC power supply turns
Changer controller U2, the second metal-oxide-semiconductor Q3, third metal-oxide-semiconductor Q4, inductance LR1, the 4th capacitor C23, transformer T1, synchronous rectification driving
Controller, the 4th metal-oxide-semiconductor Q5, the 5th metal-oxide-semiconductor Q6, the 7th capacitor C48 and the 6th resistance RS1；The leakage of the second metal-oxide-semiconductor Q3
Pole is connect with the cathode of first diode D3；The source electrode of the third metal-oxide-semiconductor Q4 is grounded, the drain electrode and second of third metal-oxide-semiconductor Q4
The binding site of the source electrode of metal-oxide-semiconductor Q3 is connect with one end of inductance LR1；The other end of inductance LR1 and the primary side winding of transformer T1
Same Name of Ends connection；One end of 4th capacitor C23 is connect with the different name end of the primary side winding of transformer T1, the 4th capacitor C23's
Other end ground connection；The resonant mode DC power supply switching controller U2 be connected separately with driving the second metal-oxide-semiconductor Q3 conducting or
Second driving circuit of cut-off and the second driving circuit of the driving third metal-oxide-semiconductor Q4 on or off；4th MOS
The drain electrode of pipe Q5 is successively by the different name of the Same Name of Ends of the first vice-side winding of transformer T1, the first vice-side winding of transformer T1
End, the Same Name of Ends of the second vice-side winding of transformer T1, transformer T1 the second vice-side winding different name end after with the described 5th
The drain electrode of metal-oxide-semiconductor Q6 connects；The source electrode of 4th metal-oxide-semiconductor Q5 and the source grounding of the 5th metal-oxide-semiconductor Q6；In the 4th metal-oxide-semiconductor Q5
Source electrode and drain electrode between be connected with the 4th resistance R52 and the 5th capacitor C47 in turn；The 5th metal-oxide-semiconductor Q6 source electrode with
It is connected with the 5th resistance R51 and the 6th capacitor C45 between drain electrode in turn；The synchronous rectification drive control device is connected separately with drive
It moves the 4th driving circuit of the 4th metal-oxide-semiconductor Q5 on or off and drives the of the 5th metal-oxide-semiconductor Q6 on or off
Five driving circuits；The knot of the Same Name of Ends of second vice-side winding at the different name end and transformer T1 of the first vice-side winding of transformer T1
Chalaza is successively grounded after the 7th capacitor C48 and the 6th resistance RS1；The binding site of 7th capacitor C48 and the 6th resistance RS1
Ground connection.Resonant mode DC power supply switching controller U2 controls the second metal-oxide-semiconductor Q3 and third metal-oxide-semiconductor Q4 alternate conduction, and 390V is straight
Galvanic electricity pressure is processed into square wave, by inductance LR1, transformer T1 primary winding and the 4th capacitor C23 composition resonant tank into
Row resonance makes transformer T1 flow through electric current to generate induced electromotive force, using synchronous rectification filter circuit by the first of transformer T1
The voltage commutation that vice-side winding and the second vice-side winding sense is filtered into direct voltage output.Preferably, as shown in figure 3, institute
It states resonant mode DC power supply switching controller U2 and is connected with the second thermal-shutdown circuit；Second thermal-shutdown circuit includes the
Seven resistance R26, the 8th resistance R28, the 9th resistance R37, the tenth resistance R38, eleventh resistor R39, the second thermistor RT1,
8th capacitor C17, the second triode Q1A and third transistor Q1；The collector of the third transistor Q1 successively passes through
Connect after eight resistance R28, the 9th resistance R37, the tenth resistance R38 and the second thermistor RT1 with the base stage of third transistor Q1
It connects；The emitter of third transistor Q1 is grounded；The binding site and resonant mode of the collector of third transistor Q1 and the 8th resistance R28
The U2 connection of DC power supply switching controller；The binding site of 8th resistance R28 and the 9th resistance R37 and the base of the second triode Q1A
Pole connection；The binding site of 9th resistance R37 and the tenth resistance R38 is straight with the emitter of the second triode Q1A and resonant mode respectively
Flow switch controller of power supply U2 connection；The both ends of the 7th resistance R26 respectively with the base stage of third transistor Q1 and the two or three
The collector of pole pipe Q1A connects；One end of the eleventh resistor R39 is connect with the base stage of third transistor Q1, another termination
Ground；One end of the 8th capacitor C17 is connect with the base stage of third transistor Q1, other end ground connection.In the present embodiment, resonant mode
The model TEA19161T of DC power supply switching controller U2.The model TEA1995T of synchronous rectification drive control device.It is preferred that
Ground is connected with output voltage detection electricity between the resonant mode DC power supply switching controller U2 and the auxiliary winding of transformer T1
Road, so that the power supply unit executes overvoltage protection.Specifically, as shown in Fig. 2, diode D7 and resistance R35 composition output electricity
Sample circuit is pressed, to detect to output voltage, so that this power supply unit has the function of overvoltage protection.And diode D8, two
Pole pipe D9, resistance R31, resistance R32, capacitor C16, capacitor C19 and capacitor C20 form current rectifying and wave filtering circuit, so that transformer
The auxiliary winding of T1 is resonant mode DC power supply switching controller U2 power supply.Further, as shown in figure 5, the resonant mode is straight
Voltage and current is connected between stream switch controller of power supply U2 and the output end of the resonant mode DC/DC isolated variable circuit
Feed circuit.Specifically, as shown in figures 2 and 5, the Ifb foot of the output end of resonant mode DC/DC isolated variable circuit passes through electricity
Hinder the Ifb pin of R64 access feedback of voltage and current circuit, the voltage of the output end of resonant mode DC/DC isolated variable circuit+
36V draws by the Ifb of the output end of resistance R62, resistance R63, resistance R64 and resonant mode DC/DC isolated variable circuit
Foot ground connection, then by the Vfb pin of the binding site of resistance R62 and resistance R63 access feedback of voltage and current circuit, to complete
The voltage sample and current sample of the output end of resonant mode DC/DC isolated variable circuit, feedback of voltage and current circuit according to
Voltage sample and current sample control flow through photoelectrical coupler photophore U7A size of current so that photoelectrical coupler by
The impedance of light device U7B changes and the SNSFB pin voltage of resonant mode DC power supply switching controller U2 is made to change, humorous
Vibration formula DC power supply switching controller U2 realizes that closed loop adjustment is defeated according to the voltage control switch frequency of its SNSFB pin
Voltage and current out.
As illustrated in fig. 1 and 2, in the present embodiment, the resonant mode DC power supply switching controller U2 and PFC
Controller U1 connection detects that the output power of the power supply unit is smaller in the resonant mode DC power supply switching controller U2
When, so that resonant mode DC power supply switching controller U2 and power factor correction controller U1 is linked and enter low power operation mode,
To improve transfer efficiency of the power supply unit when loading smaller, energy consumption is reduced.Specifically, in the present embodiment, resonant mode direct current
The SNSBOOST pin of source switching controller U2 is connect with the SNSBOOST pin of power factor correction controller U1, such as Fig. 1 and 2
It is shown.
The present invention is not limited to above-mentioned optional embodiment, anyone can show that other are each under the inspiration of the present invention
The product of kind form.Above-mentioned specific embodiment should not be understood the limitation of pairs of protection scope of the present invention, protection of the invention
Range should be subject to be defined in claims, and specification can be used for interpreting the claims.
Claims (10)
1. a kind of power supply unit of cascade bus power supply, comprising: alternating current is filtered to and is rectified into the rectifying and wave-filtering of parabolic voltage
Circuit；The parabolic voltage exported from current rectifying and wave filtering circuit progress PFC is obtained into the power factor school of DC voltage
Positive circuit；And the resonant mode for DC/DC isolated variable being carried out by the DC voltage of circuit of power factor correction output
DC/DC isolated variable circuit；It is characterized by:
It further include fan control circuitry and initiative alarming circuit；The fan control circuitry includes providing power supply for the fan
DC power supply, control direct-current power supply fan size of current the first triode (Q13) and according to environment temperature control
Make the base current control circuit of the size of current of the first triode (Q13) base stage；
The initiative alarming circuit includes alarm, controls switch and root that alarm is disconnected or connect with the DC power supply
Charge and discharge are carried out according to the pwm signal of the resonant mode DC/DC isolated variable circuit to control the switch of the switch opening and closing
Control circuit.
2. a kind of power supply unit of cascade bus power supply according to claim 1, it is characterised in that: the PFC
Circuit includes power factor correction controller (U1), the first metal-oxide-semiconductor (Q2), energy storage inductor (L1A), first diode (D3),
Two diodes (D2), first capacitor (C3) and the second capacitor (C4)；The source electrode of first metal-oxide-semiconductor (Q2) is grounded, the first MOS
The drain electrode of pipe (Q2) is connect with the anode of one end of energy storage inductor (L1A) and first diode (D3) respectively；Energy storage inductor
(L1A) the other end is connect with the anode of the second diode (D2)；The cathode of second diode (D2) respectively with first diode
(D3) one end connection of cathode, first capacitor (C3) and the second capacitor (C4)；First capacitor (C3) and the second capacitor
(C4) the other end is grounded；The cathode of second diode (D2), the cathode of first diode (D3), first capacitor (C3)
And second capacitor (C4) binding site and power factor correction controller (U1) between be connected with voltage feedback circuit；The function
Current feedback circuit, PFC are connected between rate factor correcting controller (U1) and the drain electrode of the first metal-oxide-semiconductor (Q2)
Controller (U1) is connected with the first driving circuit for driving the first metal-oxide-semiconductor (Q2) on or off, PFC control
The energy that detection energy storage inductor (L1A) energy is connected between device (U1) processed and the auxiliary winding (L1B) of energy storage inductor (L1A) is released
Put detection circuit.
3. a kind of power supply unit of cascade bus power supply according to claim 2, it is characterised in that: the PFC
Controller (U1) is connected with the first thermal-shutdown circuit；First thermal-shutdown circuit includes first resistor (R1), the second electricity
Hinder (R2), third diode (D10), the first thermistor (RT2), 3rd resistor (R3) and third capacitor (C6)；Described
One end of one resistance (R1) is connect with current rectifying and wave filtering circuit, the other end of first resistor (R1) successively pass through second resistance (R2),
The anode of third diode (D10), the cathode of third diode (D10), the first thermistor (RT2) and 3rd resistor (R3)
After be grounded；One end of the third capacitor (C6) is connect with the cathode of third diode (D10), the other end of third capacitor (C6)
Ground connection；The anode of the third diode (D10) and the binding site of second resistance (R2) and the power factor correction controller
(U1) it connects.
4. a kind of power supply unit of cascade bus power supply according to claim 2, it is characterised in that: the resonant mode direct current/
DC isolation translation circuit include resonant mode DC power supply switching controller (U2), the second metal-oxide-semiconductor (Q3), third metal-oxide-semiconductor (Q4),
Inductance (LR1), the 4th capacitor (C23), transformer (T1), synchronous rectification drive control device, the 4th metal-oxide-semiconductor (Q5), the 5th metal-oxide-semiconductor
(Q6), the 7th capacitor (C48) and the 6th resistance (RS1)；The drain electrode of second metal-oxide-semiconductor (Q3) and first diode (D3)
Cathode connection；The source electrode of the third metal-oxide-semiconductor (Q4) is grounded, the drain electrode of third metal-oxide-semiconductor (Q4) and the source electrode of the second metal-oxide-semiconductor (Q3)
Binding site connect with one end of inductance (LR1)；The Same Name of Ends of the primary side winding of the other end and transformer (T1) of inductance (LR1)
Connection；One end of 4th capacitor (C23) is connect with the different name end of the primary side winding of transformer (T1), the 4th capacitor (C23) it is another
One end ground connection；The resonant mode DC power supply switching controller (U2) is connected separately with driving the second metal-oxide-semiconductor (Q3) conducting
Or the second driving circuit of the second driving circuit and driving third metal-oxide-semiconductor (Q4) on or off ended；Described
The first pair of the Same Name of Ends of the first vice-side winding of transformer (T1), transformer (T1) is successively passed through in the drain electrode of four metal-oxide-semiconductors (Q5)
The different name end of side winding, the Same Name of Ends of the second vice-side winding of transformer (T1), transformer (T1) the second vice-side winding it is different
Name is connect behind end with the drain electrode of the 5th metal-oxide-semiconductor (Q6)；The source electrode of 4th metal-oxide-semiconductor (Q5) and the source of the 5th metal-oxide-semiconductor (Q6)
Extremely it is grounded；The 4th resistance (R52) and the 5th capacitor are connected in turn between the source electrode and drain electrode of the 4th metal-oxide-semiconductor (Q5)
(C47)；The 5th resistance (R51) and the 6th capacitor are connected in turn between the source electrode and drain electrode of the 5th metal-oxide-semiconductor (Q6)
(C45)；The synchronous rectification drive control device is connected separately with the 4 wheel driven for driving the 4th metal-oxide-semiconductor (Q5) on or off
Dynamic circuit and the 5th driving circuit for driving the 5th metal-oxide-semiconductor (Q6) on or off；The secondary side of the first of transformer (T1) around
Group different name end and transformer (T1) the second vice-side winding Same Name of Ends binding site successively pass through the 7th capacitor (C48) and
6th resistance (RS1) is grounded afterwards；The binding site of 7th capacitor (C48) and the 6th resistance (RS1) ground connection.
5. a kind of power supply unit of cascade bus power supply according to claim 4, it is characterised in that: the resonant mode direct current
Source switching controller (U2) is connected with the second thermal-shutdown circuit；Second thermal-shutdown circuit include the 7th resistance (R26),
8th resistance (R28), the 9th resistance (R37), the tenth resistance (R38), eleventh resistor (R39), the second thermistor (RT1),
8th capacitor (C17), the second triode (Q1A) and third transistor (Q1)；The collector of the third transistor (Q1) according to
It is secondary after the 8th resistance (R28), the 9th resistance (R37), the tenth resistance (R38) and the second thermistor (RT1) and third
The base stage of triode (Q1) connects；The emitter of third transistor (Q1) is grounded；The collector and the 8th of third transistor (Q1)
The binding site of resistance (R28) is connect with resonant mode DC power supply switching controller (U2)；8th resistance (R28) and the 9th resistance
(R37) binding site is connect with the base stage of the second triode (Q1A)；The binding site of 9th resistance (R37) and the tenth resistance (R38)
It is connect respectively with the emitter of the second triode (Q1A) and resonant mode DC power supply switching controller (U2)；7th resistance
(R26) both ends are connect with the collector of the base stage of third transistor (Q1) and the second triode (Q1A) respectively；Described 11st
One end of resistance (R39) is connect with the base stage of third transistor (Q1), other end ground connection；One end of 8th capacitor (C17)
It is connect with the base stage of third transistor (Q1), other end ground connection.
6. a kind of power supply unit of cascade bus power supply according to claim 4, it is characterised in that: the DC power supply includes
Voltage stabilizing chip；Second vice-side winding at the different name end and transformer (T1) of the input terminal of the voltage stabilizing chip and the first vice-side winding
Same Name of Ends binding site connection, the output end of voltage stabilizing chip connect with first triode (Q13).
7. a kind of power supply unit of cascade bus power supply according to claim 4, it is characterised in that: the resonant mode direct current
It is anti-that voltage and current is connected between source switching controller (U2) and the output end of the resonant mode DC/DC isolated variable circuit
Current feed circuit.
8. a kind of power supply unit of cascade bus power supply according to claim 1-7, it is characterised in that: the base stage
Current control circuit includes third thermistor (RT3), the 4th thermistor (RT4), twelfth resistor (R82), the 13rd electricity
Hinder (R72), the 9th capacitor (C46), the tenth capacitor (C51) and the 4th triode (Q14)；The DC power supply successively passes through
Four thermistors (RT4) and thirteenth resistor (R72) are grounded afterwards；The knot of 4th thermistor (RT4) and thirteenth resistor (R72)
Chalaza is connect with the base stage of the 4th triode (Q14)；The emitter of 4th triode (Q14) is grounded；Third thermistor
(RT3) both ends are connect with the base stage of the collector of the 4th triode (Q14) and the first triode (Q13) respectively；One or three pole
The emitter of pipe (Q13) is connect with DC power supply, and the collector of the first triode (Q13) and the anode of fan connect；12nd
Resistance (R82) is in parallel with third thermistor (RT3)；One end of tenth capacitor (C51) and the base stage of the 4th triode (Q14) connect
It connects, other end ground connection；One end of 9th capacitor (C46) is connect with the collector of the first triode (Q13), other end ground connection.
9. a kind of power supply unit of cascade bus power supply according to claim 4, it is characterised in that: the resonant mode direct current
Source switching controller (U2) is connect with power factor correction controller (U1), in the resonant mode DC power supply switching controller
(U2) when detecting that the output power of the power supply unit is smaller, make resonant mode DC power supply switching controller (U2) and power factor
Correcting controller (U1) linkage enters low power operation mode.
10. a kind of power supply unit of cascade bus power supply according to claim 4, it is characterised in that: the resonant mode direct current
It is connected with output voltage detecting circuit between switch controller of power supply (U2) and the auxiliary winding of transformer (T1), so that the confession
Device is answered to execute overvoltage protection.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811044053.8A CN109039051B (en) | 2018-09-07 | 2018-09-07 | Cascade bus power supply's supplier |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811044053.8A CN109039051B (en) | 2018-09-07 | 2018-09-07 | Cascade bus power supply's supplier |
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| CN109039051B CN109039051B (en) | 2023-12-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113467537A (en) * | 2021-05-25 | 2021-10-01 | 中国电子科技集团公司第四十一研究所 | Temperature real-time monitoring circuit based on DSP |
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