CN109039051B - Cascade bus power supply's supplier - Google Patents
Cascade bus power supply's supplier Download PDFInfo
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- CN109039051B CN109039051B CN201811044053.8A CN201811044053A CN109039051B CN 109039051 B CN109039051 B CN 109039051B CN 201811044053 A CN201811044053 A CN 201811044053A CN 109039051 B CN109039051 B CN 109039051B
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- power supply
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 60
- 238000002955 isolation Methods 0.000 claims abstract description 23
- 238000001914 filtration Methods 0.000 claims abstract description 12
- 238000007599 discharging Methods 0.000 claims abstract description 6
- 239000003990 capacitor Substances 0.000 claims description 97
- 238000004804 winding Methods 0.000 claims description 41
- 238000004146 energy storage Methods 0.000 claims description 20
- 230000000087 stabilizing effect Effects 0.000 claims description 12
- 230000001360 synchronised effect Effects 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 2
- 238000013024 troubleshooting Methods 0.000 abstract description 3
- 230000001276 controlling effect Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 238000005070 sampling Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 238000010420 art technique Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000001105 regulatory effect Effects 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
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- 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
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- 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
Landscapes
- 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 the technical field of switching power supplies, and discloses a cascade bus power supply, which comprises a rectifying and filtering circuit, a power factor correction circuit and a resonant direct current/direct current isolation conversion circuit; the fan control circuit and the active alarm circuit are also included; the fan control circuit comprises a direct current power supply for supplying power to the fan, a first triode for controlling the current of the direct current power supply for supplying the fan, and a base current control circuit for controlling the current of a base of the first triode according to the ambient temperature; the active alarm circuit comprises an alarm, a switch for controlling the alarm to be disconnected or connected with the direct current power supply, and a switch control circuit for controlling the switch to be opened or closed by charging and discharging according to PWM signals of the resonant direct current/direct current isolation conversion circuit. The invention enables the start and stop of the fan and the speed to be changed according to the ambient temperature, thereby prolonging the service life of the fan; when the supply device fails, the supply device can be rapidly positioned, and the troubleshooting is greatly facilitated.
Description
Technical Field
The invention belongs to the technical field of switching power supplies, and particularly relates to a cascade bus power supply.
Background
The power supply is an important component of various electronic devices, and is just like the heart of a human body, so as to provide power for the normal operation of all electrical devices. With the rapid development of various electronic devices and electric appliances, there is also a great demand for high-quality power supplies with high efficiency and stable performance. The switch power supply is widely applied to almost all electronic devices with the characteristics of small size, light weight and high efficiency, and is an indispensable power supply mode for the rapid development of the electronic information industry at present. But in power supply system applications such as space stations, base stations, computer servers, etc. where high power, high precision uninterruptible power supply is required, a single switching power supply has not been able to meet the normal power supply requirements of the device. The technology of connecting a plurality of switching power supplies in parallel has become an important component of a high-power distributed power supply.
However, a single switch power supply in the existing high-power distributed power supply has no fault alarm function, and is extremely inconvenient to troubleshoot after the single switch power supply has faults; in addition, the fan of each switching power supply cannot be started or stopped or regulated according to the change of the ambient temperature, so that the service life of the fan is greatly shortened.
Disclosure of Invention
In order to solve the above problems in the prior art, an object of the present invention is to provide a supply device for a cascade bus power supply. According to the invention, the fan control circuit is arranged, so that the start and stop of the fan and the speed are changed according to the ambient temperature, and the service life of the fan is prolonged; secondly, the invention can be rapidly positioned when the supply device fails by arranging the active alarm circuit, thereby greatly facilitating the troubleshooting of the failure.
The technical scheme adopted by the invention is as follows:
a supply of cascaded bus power comprising: a rectifying and filtering circuit for filtering and rectifying the alternating current into parabolic wave voltage; a power factor correction circuit for performing power factor correction on the parabolic voltage output from the rectification filter circuit to obtain a direct current voltage; and a resonant DC/DC isolation conversion circuit for DC/DC isolation conversion of the DC voltage outputted by the PFC circuit;
the fan control circuit and the active alarm circuit are also included; the fan control circuit comprises a direct current power supply for providing power for the fan, a first triode for controlling the current of the direct current power supply for the fan, and a base current control circuit for controlling the current of a base of the first triode according to the ambient temperature;
the active alarm circuit comprises an alarm, a switch for controlling the alarm to be disconnected or connected with the direct current power supply, and a switch control circuit for controlling the switch to be opened or closed by charging and discharging according to PWM signals of the resonant direct current/direct current isolation conversion circuit.
Further, the power factor correction circuit comprises a power factor correction controller, a first tube, an energy storage inductor, a first diode, a second diode, a first capacitor and a second capacitor; the source electrode of the first tube is grounded, and the drain electrode of the first tube is respectively connected with one end of the energy storage inductor and the anode of the first diode; the other end of the energy storage inductor is connected with the anode of the second diode; the cathode of the second diode is respectively connected with the cathode of the first diode, one end of the first capacitor and one end of the second capacitor; the other ends of the first capacitor and the second capacitor are grounded; a voltage feedback circuit is connected between the cathode of the second diode, the cathode of the first diode, the junction of the first capacitor and the second capacitor and the power factor correction controller; the power factor correction controller is connected with a first driving circuit for driving the first tube to be conducted or cut off, and an energy release detection circuit for detecting the energy of the energy storage inductor is connected between the power factor correction controller and an auxiliary winding of the energy storage inductor.
Further, the power factor correction controller is connected with a first over-temperature protection circuit; the first over-temperature protection circuit comprises a first resistor, a second resistor, a third diode, a first thermistor, a third resistor and a third capacitor; one end of the first resistor is connected with the rectifying and filtering circuit, and the other end of the first resistor is grounded after passing through the second resistor, the anode of the third diode, the cathode of the third diode, the first thermistor and the third resistor in sequence; one end of the third capacitor is connected with the cathode of the third diode, and the other end of the third capacitor is grounded; the junction of the anode of the third diode and the second resistor is connected with the power factor correction controller.
Further, the resonant direct current/direct current isolation conversion circuit comprises a resonant direct current power supply conversion controller, a second tube, a third tube, an inductor, a fourth capacitor, a transformer, a synchronous rectification driving controller, a fourth tube, a fifth tube, a seventh capacitor and a sixth resistor; the drain electrode of the second tube is connected with the cathode of the first diode; the source electrode of the third tube is grounded, and the joint point of the drain electrode of the third tube and the source electrode of the second tube is connected with one end of the inductor; the other end of the inductor is connected with the same-name end of the primary winding of the transformer; one end of the fourth capacitor is connected with the different name end of the primary winding of the transformer, and the other end of the fourth capacitor is grounded; the resonant direct-current power supply conversion controller is respectively connected with a second driving circuit for driving the second pipe to be turned on or off and a second driving circuit for driving the third pipe to be turned on or off; the drain electrode of the fourth pipe is connected with the drain electrode of the fifth pipe after passing through the same-name end of the first secondary winding of the transformer, the different-name end of the first secondary winding of the transformer, the same-name end of the second secondary winding of the transformer and the different-name end of the second secondary winding of the transformer in sequence; the source electrode of the fourth pipe and the source electrode of the fifth pipe are grounded; a fourth resistor and a fifth capacitor are sequentially connected between the source electrode and the drain electrode of the fourth tube; a fifth resistor and a sixth capacitor are sequentially connected between the source electrode and the drain electrode of the fifth tube; the synchronous rectification driving controller is respectively connected with a fourth driving circuit for driving the fourth pipe to be turned on or off and a fifth driving circuit for driving the fifth pipe to be turned on or off; the junction point of the synonym end of the first secondary winding of the transformer and the synonym end of the second secondary winding of the transformer is grounded after passing through a seventh capacitor and a sixth resistor in sequence; the junction of the seventh capacitor and the sixth resistor is grounded.
Further, the resonant DC power supply conversion controller is connected with a second over-temperature protection circuit; the second over-temperature protection circuit comprises a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a second thermistor, an eighth capacitor, a second triode and a third triode; the collector electrode of the third triode sequentially passes through the eighth resistor, the ninth resistor, the tenth resistor and the second thermistor and is connected with the base electrode of the third triode; the emitter of the third triode is grounded; the junction point of the collector electrode of the third triode and the eighth resistor is connected with the resonant DC power supply conversion controller; the junction point of the eighth resistor and the ninth resistor is connected with the base electrode of the second triode; the junction point of the ninth resistor and the tenth resistor is respectively connected with the emitter of the second triode and the resonant DC power supply conversion controller; two ends of the seventh resistor are respectively connected with the base electrode of the third triode and the collector electrode of the second triode; one end of the eleventh resistor is connected with the base electrode of the third triode, and the other end of the eleventh resistor is grounded; one end of the eighth capacitor is connected with the base electrode of the third triode, and the other end of the eighth capacitor is grounded.
Further, the direct current power supply comprises a voltage stabilizing chip; the input end of the voltage stabilizing chip is connected with a joint point of the different-name end of the first secondary winding and the same-name end of the second secondary winding of the transformer, and the output end of the voltage stabilizing chip is connected with the first triode.
Further, a voltage and current feedback circuit is connected between the resonant DC power supply conversion controller and the output end of the resonant DC/DC isolation conversion circuit.
Further, the base current control circuit comprises a third thermistor, a fourth thermistor, a twelfth resistor, a thirteenth resistor, a ninth capacitor, a tenth capacitor and a fourth triode; the direct current power supply is grounded after passing through a fourth thermistor and a thirteenth resistor in sequence; the junction point of the fourth thermistor and the thirteenth resistor is connected with the base electrode of the fourth triode; the emitter of the fourth triode is grounded; two ends of the third thermistor are respectively connected with the collector electrode of the fourth triode and the base electrode of the first triode; the emitter of the first triode is connected with a direct current power supply, and the collector of the first triode is connected with the positive electrode of the fan; the twelfth resistor is connected with the third thermistor in parallel; one end of the tenth capacitor is connected with the base electrode of the fourth triode, and the other end of the tenth capacitor is grounded; one end of the ninth capacitor is connected with the collector electrode of the first triode, and the other end of the ninth capacitor is grounded.
Further, the resonant direct-current power supply conversion controller is connected with the power factor correction controller, and when the resonant direct-current power supply conversion controller detects that the output power of the supply is smaller, the resonant direct-current power supply conversion controller and the power factor correction controller are linked to enter a low-power consumption operation mode.
Further, an output voltage detection circuit is connected between the resonant dc power conversion controller and an auxiliary winding of the transformer, so that the supply performs overvoltage protection.
The beneficial effects of the invention are as follows:
according to the invention, the fan control circuit is arranged, so that the start and stop of the fan and the speed are changed according to the ambient temperature, and the service life of the fan is prolonged; secondly, the invention can be rapidly positioned when the supply device fails by arranging the active alarm circuit, thereby greatly facilitating the troubleshooting of the failure; in addition, the first over-temperature protection circuit and the second over-temperature protection circuit are arranged, so that the risk that the service life of the supply device is influenced by the ambient temperature is greatly reduced, and the reliability of the supply device is greatly improved.
Drawings
Fig. 1 is a schematic circuit diagram of a rectifying filter circuit, a surge current suppression circuit, a differential mode filter circuit, a power factor correction circuit and a first over-temperature protection circuit in a cascade bus power supply according to the present invention;
FIG. 2 is a schematic diagram of a resonant DC/DC isolated converter circuit in a cascaded bus power supply according to the present invention;
FIG. 3 is a schematic diagram of a second over-temperature protection circuit in a cascaded bus power supply according to the present invention;
FIG. 4 is a schematic diagram of a fan control circuit in a cascaded bus power supply according to the present invention;
FIG. 5 is a schematic diagram of a voltage-current feedback circuit in a cascaded bus power supply according to the present invention;
FIG. 6 is a schematic diagram of a DC power supply in a cascade bus power supply according to the present invention;
fig. 7 is a schematic circuit diagram of an active alarm circuit in a cascaded bus power supply according to the present invention.
Detailed Description
The invention is further illustrated by the following description of specific embodiments in conjunction with the accompanying drawings.
Example 1:
as shown in fig. 1-7, the present embodiment provides a supply of a cascade bus power supply, including: a rectifying and filtering circuit for filtering and rectifying the alternating current into parabolic wave voltage; a power factor correction circuit for performing power factor correction on the parabolic voltage output from the rectification filter circuit to obtain a direct current voltage; and a resonant DC/DC isolation conversion circuit for DC/DC isolation conversion of the DC voltage outputted by the PFC circuit; the alternating current is processed into parabolic wave voltage through a rectifying and filtering circuit, and the parabolic wave voltage is processed into 390V direct current voltage through a power factor correction circuit; the resonant DC/DC isolation conversion circuit processes 390V DC voltage to 36V bus voltage. Preferably, as shown in fig. 1, the supply device in this embodiment further includes an inrush current suppression circuit and a differential mode filter circuit connected in sequence between the rectifying filter circuit and the power factor correction circuit.
In this embodiment, the controller further includes a fan control circuit and an active alarm circuit; the fan control circuit comprises a direct current power supply for providing power for the fan, a first triode Q13 for controlling the current of the direct current power supply for the fan, and a base current control circuit for controlling the current of a base electrode of the first triode Q13 according to the ambient temperature; specifically, as shown in fig. 4, the base current control circuit includes a third thermistor RT3, a fourth thermistor RT4, a twelfth resistor R82, a thirteenth resistor R72, a ninth capacitor C46, a tenth capacitor C51, and a fourth transistor Q14; the direct current power supply is grounded after passing through a fourth thermistor RT4 and a thirteenth resistor R72 in sequence; the junction of the fourth thermistor RT4 and the thirteenth resistor R72 is connected with the base electrode of the fourth triode Q14; the emitter of the fourth triode Q14 is grounded; two ends of the third thermistor RT3 are respectively connected with a collector electrode of the fourth triode Q14 and a base electrode of the first triode Q13; the emitter of the first triode Q13 is connected with a direct current power supply, and the collector of the first triode Q13 is connected with the positive electrode of the fan; the twelfth resistor R82 is connected with the third thermistor RT3 in parallel; one end of the tenth capacitor C51 is connected with the base electrode of the fourth triode Q14, and the other end of the tenth capacitor C is grounded; one end of the ninth capacitor C46 is connected to the collector of the first transistor Q13, and the other end is grounded. The working principle of the fan control circuit is that when the external temperature is lower than a set value, the resistance value of the fourth thermistor RT4 is higher, so that the fourth triode Q14 is in a cut-off state, the first triode Q13 is also in a cut-off state, and the fan stops working; when the external temperature gradually rises, the resistance of the fourth thermistor RT4 gradually decreases, so that the fourth triode Q14 is in a conducting state, the first triode Q13 is further conducted, the fan is driven by current and starts to work, and as the external temperature further rises, the resistance of the third thermistor RT3 gradually decreases, so that the base current of the first triode Q13 gradually increases, the rotating speed of the fan increases, and the purpose of instant heat dissipation is achieved. Preferably, as shown in fig. 4, a fourteenth resistor R73 is connected between the collector of the first triode Q13 and the base of the fourth triode Q14.
The active alarm circuit in the embodiment comprises an alarm, a switch for controlling the alarm to be disconnected or connected with the direct current power supply, and a switch control circuit for controlling the switch to be opened or closed by charging and discharging according to PWM signals of the resonant direct current/direct current isolation conversion circuit. Specifically, the active alarm circuit is realized by adopting a circuit shown in fig. 7, and the working principle is as follows: when the supply device works normally, the switch control circuit charges and discharges through the capacitor C100, and the charging current of the capacitor C100 is far smaller than the discharging current of the capacitor C100 by setting the resistance value of the resistor R100 reasonably, so that the voltage of the capacitor C100 always fluctuates in a lower range, and when the capacitor C100 discharges, the discharging voltage of the capacitor C100 is divided by the R101, the triode Q10 cannot be conducted by the R102, and the alarm BZ1 cannot be electrified for alarming. When the supply fails, the PWM signal of the supply stops outputting, VD2 is equal to 36V of the bus dc voltage, the bus dc voltage charges the capacitor C100 through the resistor R100, the voltage of the capacitor C100 is equal to 36V of the bus dc voltage, the voltage of the capacitor C100 is divided by R101 and R102 and then outputted to the base of the transistor Q10, the transistor Q10 is turned on, the alarm BZ1 is powered on to alarm, and the alarm BZ1 giving the alarm is found to be the failed supply. The alarm BZ1 may be implemented by using an existing buzzer, a light emitting diode, or the like. The dc power supply may be implemented using prior art techniques, such as a battery. As shown in fig. 6, the dc power supply in the present embodiment includes a voltage stabilizing chip; the input end of the voltage stabilizing chip is connected with a joint point of the different-name end of the first secondary winding and the same-name end of the second secondary winding of the transformer T1, and the output end of the voltage stabilizing chip is connected with the first triode Q13. The voltage stabilizing chip converts the 36V bus voltage outputted by the output end of the resonant DC/DC isolation conversion circuit into a 12V DC power supply. The voltage stabilizing chip can be realized by adopting the prior art, for example, the voltage stabilizing chip with the model LM2576 can be adopted.
As shown in fig. 1, the power factor correction circuit in the present embodiment includes a power factor correction controller U1, a first MOS transistor Q2, an energy storage inductor L1A, a first diode D3, a second diode D2, a first capacitor C3, and a second capacitor C4; the source electrode of the first MOS tube Q2 is grounded, and the drain electrode of the first MOS tube Q2 is respectively connected with one end of the energy storage inductor L1A and the anode of the first diode D3; the other end of the energy storage inductor L1A is connected with the anode of the second diode D2; the cathode of the second diode D2 is respectively connected with the cathode of the first diode D3, one end of the first capacitor C3 and one end of the second capacitor C4; the other ends of the first capacitor C3 and the second capacitor C4 are grounded; a voltage feedback circuit is connected between the junction point of the cathode of the second diode D2, the cathode of the first diode D3, the first capacitor C3 and the second capacitor C4 and the power factor correction controller U1; a current feedback circuit is connected between the power factor correction controller U1 and the drain electrode of the first MOS tube Q2, the power factor correction controller U1 is connected with a first driving circuit for driving the first MOS tube Q2 to be turned on or off, and an energy release detection circuit for detecting the energy of the energy storage inductor L1A is connected between the power factor correction controller U1 and the auxiliary winding L1B of the energy storage inductor L1A. The power factor correction controller U1 adopts an on time control technology, calculates the time for which the first MOS tube Q2 needs to be conducted according to the feedback signals of the voltage feedback circuit and the current feedback circuit, and outputs a PWM control signal to enable the first MOS tube Q2 to be conducted, so that current is formed on the energy storage inductor L1A to enable the energy storage inductor to store energy, and after the first MOS tube Q2 is closed, the energy storage inductor L1A releases energy to charge the first capacitor C3 through the first diode D3; the power factor correction controller U1 determines whether the energy stored in the energy storage inductor L1A is completely released by detecting the induced voltage on the auxiliary winding L1B of the energy storage inductor L1A, so as to control the first MOS transistor Q2 to be turned on again. Preferably, as shown in fig. 1, the power factor correction controller U1 is connected with a first over-temperature protection circuit; the first over-temperature protection circuit comprises a first resistor R1, a second resistor R2, a third diode D10, a first thermistor RT2, a third resistor R3 and a third capacitor C6; one end of the first resistor R1 is connected with the rectifying and filtering circuit, and the other end of the first resistor R1 is grounded after passing through the second resistor R2, the anode of the third diode D10, the cathode of the third diode D10, the first thermistor RT2 and the third resistor R3 in sequence; one end of the third capacitor C6 is connected with the cathode of the third diode D10, and the other end of the third capacitor C6 is grounded; the junction of the anode of the third diode D10 and the second resistor R2 is connected to the pfc controller U1. The model of the pfc controller U1 in this embodiment is TEA19162T.
As shown in fig. 2, the resonant dc/dc isolation conversion circuit in the present embodiment includes a resonant dc power conversion controller U2, a second MOS transistor Q3, a third MOS transistor Q4, an inductor LR1, a fourth capacitor C23, a transformer T1, a synchronous rectification driving controller, a fourth MOS transistor Q5, a fifth MOS transistor Q6, a seventh capacitor C48, and a sixth resistor RS1; the drain electrode of the second MOS tube Q3 is connected with the cathode of the first diode D3; the source electrode of the third MOS tube Q4 is grounded, and the joint point of the drain electrode of the third MOS tube Q4 and the source electrode of the second MOS tube Q3 is connected with one end of the inductor LR 1; the other end of the inductor LR1 is connected with the homonymous end of the primary winding of the transformer T1; one end of the fourth capacitor C23 is connected with the synonym end of the primary winding of the transformer T1, and the other end of the fourth capacitor C23 is grounded; the resonant DC power supply conversion controller U2 is respectively connected with a second driving circuit for driving the second MOS tube Q3 to be turned on or off and a second driving circuit for driving the third MOS tube Q4 to be turned on or off; the drain electrode of the fourth MOS transistor Q5 is connected to the drain electrode of the fifth MOS transistor Q6 after passing through the homonymous end of the first secondary winding of the transformer T1, the heteronymous end of the first secondary winding of the transformer T1, the homonymous end of the second secondary winding of the transformer T1, and the heteronymous end of the second secondary winding of the transformer T1 in sequence; the source electrode of the fourth MOS tube Q5 and the source electrode of the fifth MOS tube Q6 are grounded; a fourth resistor R52 and a fifth capacitor C47 are sequentially connected between the source electrode and the drain electrode of the fourth MOS tube Q5; a fifth resistor R51 and a sixth capacitor C45 are sequentially connected between the source electrode and the drain electrode of the fifth MOS tube Q6; the synchronous rectification driving controller is respectively connected with a fourth driving circuit for driving the fourth MOS tube Q5 to be turned on or off and a fifth driving circuit for driving the fifth MOS tube Q6 to be turned on or off; the junction point of the synonym end of the first secondary winding of the transformer T1 and the synonym end of the second secondary winding of the transformer T1 is grounded after passing through a seventh capacitor C48 and a sixth resistor RS1 in sequence; the junction of the seventh capacitor C48 and the sixth resistor RS1 is grounded. The resonant DC power supply conversion controller U2 controls the second MOS tube Q3 and the third MOS tube Q4 to be alternately conducted, 390V DC voltage is processed into square waves, the square waves are resonated through a resonant circuit formed by an inductor LR1, a primary winding of a transformer T1 and a fourth capacitor C23, induced electromotive force is generated when current flows through the transformer T1, and then voltage sensed by a first secondary winding and a second secondary winding of the transformer T1 is rectified and filtered into DC voltage through a synchronous rectification filter circuit. Preferably, as shown in fig. 3, the resonant dc power conversion controller U2 is connected with a second over-temperature protection circuit; the second over-temperature protection circuit comprises a seventh resistor R26, an eighth resistor R28, a ninth resistor R37, a tenth resistor R38, an eleventh resistor R39, a second thermistor RT1, an eighth capacitor C17, a second triode Q1A and a third triode Q1; the collector of the third triode Q1 is connected with the base of the third triode Q1 after passing through an eighth resistor R28, a ninth resistor R37, a tenth resistor R38 and a second thermistor RT1 in sequence; the emitter of the third triode Q1 is grounded; the junction point of the collector electrode of the third triode Q1 and the eighth resistor R28 is connected with the resonant DC power supply conversion controller U2; the junction point of the eighth resistor R28 and the ninth resistor R37 is connected with the base electrode of the second triode Q1A; the junction of the ninth resistor R37 and the tenth resistor R38 is respectively connected with the emitter of the second triode Q1A and the resonant DC power supply conversion controller U2; two ends of the seventh resistor R26 are respectively connected with the base electrode of the third triode Q1 and the collector electrode of the second triode Q1A; one end of the eleventh resistor R39 is connected with the base electrode of the third triode Q1, and the other end of the eleventh resistor R39 is grounded; one end of the eighth capacitor C17 is connected with the base electrode of the third triode Q1, and the other end of the eighth capacitor C is grounded. In this embodiment, the resonant dc power conversion controller U2 is model number TEA19161T. The synchronous rectification drive controller is model TEA1995T. Preferably, an output voltage detection circuit is connected between the resonant dc power conversion controller U2 and the auxiliary winding of the transformer T1, so that the supply performs overvoltage protection. Specifically, as shown in fig. 2, the diode D7 and the resistor R35 form an output voltage sampling circuit to detect the output voltage, so that the present supply has an overvoltage protection function. The diode D8, the diode D9, the resistor R31, the resistor R32, the capacitor C16, the capacitor C19 and the capacitor C20 form a rectifying and filtering circuit, so that the auxiliary winding of the transformer T1 supplies power to the resonant dc power conversion controller U2. Further, as shown in fig. 5, a voltage-current feedback circuit is connected between the resonant dc power conversion controller U2 and the output end of the resonant dc/dc isolation conversion circuit. Specifically, as shown in fig. 2 and 5, the Ifb pin at the output end of the resonant dc/dc isolation conversion circuit is connected to the Ifb pin of the voltage-current feedback circuit through the resistor R64, the voltage +6v at the output end of the resonant dc/dc isolation conversion circuit is grounded through the resistor R62, the resistor R63, the resistor R64 and the Ifb pin at the output end of the resonant dc/dc isolation conversion circuit, and then the junction point of the resistor R62 and the resistor R63 is connected to the Vfb pin of the voltage-current feedback circuit, so that the voltage sampling and the current sampling at the output end of the resonant dc/dc isolation conversion circuit are completed, the voltage-current feedback circuit controls the current flowing through the light emitter U7A of the photoelectric coupler according to the voltage sampling and the current sampling, so that the impedance of the light receiver U7B of the photoelectric coupler changes, the SNSFB pin of the resonant dc power conversion controller U2 changes, and the switching frequency of the resonant dc power conversion controller U2 adjusts the switching frequency according to the voltage of the SNSFB pin thereof, thereby realizing closed-loop adjustment of the output voltage.
As shown in fig. 1 and 2, in this embodiment, the resonant dc power conversion controller U2 is connected to the pfc controller U1, and when the resonant dc power conversion controller U2 detects that the output power of the power supply is smaller, the resonant dc power conversion controller U2 and the pfc controller U1 are linked to enter a low-power operation mode, so as to improve the conversion efficiency of the power supply when the load is smaller, and reduce the energy consumption. Specifically, in the present embodiment, the SNSBOOST pin of the resonant dc power conversion controller U2 is connected to the SNSBOOST pin of the pfc controller U1, as shown in fig. 1 and 2.
The invention is not limited to the alternative embodiments described above, but any person may derive other various forms of products in the light of the present invention. The above detailed description should not be construed as limiting the scope of the invention, which is defined in the claims and the description may be used to interpret the claims.
Claims (10)
1. A supply of cascaded bus power comprising: a rectifying and filtering circuit for filtering and rectifying the alternating current into parabolic wave voltage; a power factor correction circuit for performing power factor correction on the parabolic voltage output from the rectification filter circuit to obtain a direct current voltage; and a resonant DC/DC isolation conversion circuit for DC/DC isolation conversion of the DC voltage outputted by the PFC circuit; the method is characterized in that:
the fan control circuit and the active alarm circuit are also included; the fan control circuit comprises a direct current power supply for providing power for the fan, a first triode (Q13) for controlling the current of the direct current power supply for the fan, and a base current control circuit for controlling the current of a base electrode of the first triode (Q13) according to the ambient temperature;
the active alarm circuit comprises an alarm, a switch for controlling the alarm to be disconnected or connected with the direct current power supply, and a switch control circuit for controlling the switch to be opened or closed by charging and discharging according to PWM signals of the resonant direct current/direct current isolation conversion circuit.
2. The supply of claim 1, wherein: the power factor correction circuit comprises a power factor correction controller (U1), a first MOS tube (Q2), an energy storage inductor (L1A), a first diode (D3), a second diode (D2), a first capacitor (C3) and a second capacitor (C4); the source electrode of the first MOS tube (Q2) is grounded, and the drain electrode of the first MOS tube (Q2) is respectively connected with one end of the energy storage inductor (L1A) and the anode of the first diode (D3); the other end of the energy storage inductor (L1A) is connected with the anode of the second diode (D2); the cathode of the second diode (D2) is respectively connected with the cathode of the first diode (D3), one end of the first capacitor (C3) and one end of the second capacitor (C4); the other ends of the first capacitor (C3) and the second capacitor (C4) are grounded; a voltage feedback circuit is connected between the junction point of the cathode of the second diode (D2), the cathode of the first diode (D3), the first capacitor (C3) and the second capacitor (C4) and the power factor correction controller (U1); a current feedback circuit is connected between the power factor correction controller (U1) and the drain electrode of the first MOS tube (Q2), the power factor correction controller (U1) is connected with a first driving circuit for driving the first MOS tube (Q2) to be turned on or off, and an energy release detection circuit for detecting the energy of the energy storage inductor (L1A) is connected between the power factor correction controller (U1) and the auxiliary winding (L1B) of the energy storage inductor (L1A).
3. A supply of cascaded bus power as set forth in claim 2 wherein: the power factor correction controller (U1) is connected with a first over-temperature protection circuit; the first over-temperature protection circuit comprises a first resistor (R1), a second resistor (R2), a third diode (D10), a first thermistor (RT 2), a third resistor (R3) and a third capacitor (C6); one end of the first resistor (R1) is connected with the rectifying and filtering circuit, and the other end of the first resistor (R1) is grounded after passing through the second resistor (R2), the anode of the third diode (D10), the cathode of the third diode (D10), the first thermistor (RT 2) and the third resistor (R3) in sequence; one end of the third capacitor (C6) is connected with the cathode of the third diode (D10), and the other end of the third capacitor (C6) is grounded; the junction of the anode of the third diode (D10) and the second resistor (R2) is connected with the power factor correction controller (U1).
4. A supply of cascaded bus power as set forth in claim 2 wherein: the resonant direct current/direct current isolation conversion circuit comprises a resonant direct current power supply conversion controller (U2), a second MOS tube (Q3), a third MOS tube (Q4), an inductor (LR 1), a fourth capacitor (C23), a transformer (T1), a synchronous rectification driving controller, a fourth MOS tube (Q5), a fifth MOS tube (Q6), a seventh capacitor (C48) and a sixth resistor (RS 1); the drain electrode of the second MOS tube (Q3) is connected with the cathode of the first diode (D3); the source electrode of the third MOS tube (Q4) is grounded, and the joint point of the drain electrode of the third MOS tube (Q4) and the source electrode of the second MOS tube (Q3) is connected with one end of the inductor (LR 1); the other end of the inductor (LR 1) is connected with the homonymous end of the primary winding of the transformer (T1); one end of the fourth capacitor (C23) is connected with the synonym end of the primary winding of the transformer (T1), and the other end of the fourth capacitor (C23) is grounded; the resonant direct-current power supply conversion controller (U2) is respectively connected with a second driving circuit for driving the second MOS tube (Q3) to be turned on or off and a second driving circuit for driving the third MOS tube (Q4) to be turned on or off; the drain electrode of the fourth MOS tube (Q5) is connected with the drain electrode of the fifth MOS tube (Q6) after passing through the same-name end of the first secondary winding of the transformer (T1), the different-name end of the first secondary winding of the transformer (T1), the same-name end of the second secondary winding of the transformer (T1) and the different-name end of the second secondary winding of the transformer (T1) in sequence; the source electrode of the fourth MOS tube (Q5) and the source electrode of the fifth MOS tube (Q6) are grounded; a fourth resistor (R52) and a fifth capacitor (C47) are sequentially connected between the source electrode and the drain electrode of the fourth MOS tube (Q5); a fifth resistor (R51) and a sixth capacitor (C45) are sequentially connected between the source electrode and the drain electrode of the fifth MOS tube (Q6); the synchronous rectification driving controller is respectively connected with a fourth driving circuit for driving the fourth MOS tube (Q5) to be turned on or off and a fifth driving circuit for driving the fifth MOS tube (Q6) to be turned on or off; the junction point of the different-name end of the first secondary winding of the transformer (T1) and the same-name end of the second secondary winding of the transformer (T1) is grounded after passing through a seventh capacitor (C48) and a sixth resistor (RS 1) in sequence; the junction of the seventh capacitor (C48) and the sixth resistor (RS 1) is grounded.
5. The supply of claim 4, wherein: the resonant direct-current power supply conversion controller (U2) is connected with a second over-temperature protection circuit; the second over-temperature protection circuit comprises a seventh resistor (R26), an eighth resistor (R28), a ninth resistor (R37), a tenth resistor (R38), an eleventh resistor (R39), a second thermistor (RT 1), an eighth capacitor (C17), a second triode (Q1A) and a third triode (Q1); the collector electrode of the third triode (Q1) is connected with the base electrode of the third triode (Q1) after passing through an eighth resistor (R28), a ninth resistor (R37), a tenth resistor (R38) and a second thermistor (RT 1) in sequence; the emitter of the third triode (Q1) is grounded; the junction point of the collector electrode of the third triode (Q1) and the eighth resistor (R28) is connected with a resonant direct-current power supply conversion controller (U2); the junction of the eighth resistor (R28) and the ninth resistor (R37) is connected with the base electrode of the second triode (Q1A); the joint point of the ninth resistor (R37) and the tenth resistor (R38) is respectively connected with the emitter of the second triode (Q1A) and the resonant DC power supply conversion controller (U2); two ends of the seventh resistor (R26) are respectively connected with the base electrode of the third triode (Q1) and the collector electrode of the second triode (Q1A); one end of the eleventh resistor (R39) is connected with the base electrode of the third triode (Q1), and the other end of the eleventh resistor is grounded; one end of the eighth capacitor (C17) is connected with the base electrode of the third triode (Q1), and the other end of the eighth capacitor is grounded.
6. The supply of claim 4, wherein: the direct current power supply comprises a voltage stabilizing chip; the input end of the voltage stabilizing chip is connected with a joint point of the different-name end of the first secondary winding and the same-name end of the second secondary winding of the transformer (T1), and the output end of the voltage stabilizing chip is connected with the first triode (Q13).
7. The supply of claim 4, wherein: and a voltage and current feedback circuit is connected between the resonant DC power supply conversion controller (U2) and the output end of the resonant DC/DC isolation conversion circuit.
8. A supply of cascaded bus power as claimed in any one of claims 1-7, wherein: the base current control circuit comprises a third thermistor (RT 3), a fourth thermistor (RT 4), a twelfth resistor (R82), a thirteenth resistor (R72), a ninth capacitor (C46), a tenth capacitor (C51) and a fourth triode (Q14); the direct current power supply is grounded after passing through a fourth thermistor (RT 4) and a thirteenth resistor (R72) in sequence; the junction of the fourth thermistor (RT 4) and the thirteenth resistor (R72) is connected with the base electrode of the fourth triode (Q14); the emitter of the fourth triode (Q14) is grounded; both ends of the third thermistor (RT 3) are respectively connected with the collector electrode of the fourth triode (Q14) and the base electrode of the first triode (Q13); an emitter of the first triode (Q13) is connected with a direct current power supply, and a collector of the first triode (Q13) is connected with an anode of the fan; a twelfth resistor (R82) is connected in parallel with the third thermistor (RT 3); one end of the tenth capacitor (C51) is connected with the base electrode of the fourth triode (Q14), and the other end of the tenth capacitor is grounded; one end of the ninth capacitor (C46) is connected with the collector electrode of the first triode (Q13), and the other end of the ninth capacitor is grounded.
9. The supply of claim 4, wherein: the resonant direct-current power supply conversion controller (U2) is connected with the power factor correction controller (U1), and when the resonant direct-current power supply conversion controller (U2) detects that the output power of the supply is smaller, the resonant direct-current power supply conversion controller (U2) and the power factor correction controller (U1) are linked to enter a low-power consumption operation mode.
10. The supply of claim 4, wherein: an output voltage detection circuit is connected between the resonant DC power supply conversion controller (U2) and an auxiliary winding of the transformer (T1) so as to enable the supply to execute overvoltage protection.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202094895U (en) * | 2011-06-22 | 2011-12-28 | 商丘市电业局永城分局 | Fault indicating optical line terminal |
| CN202501909U (en) * | 2012-03-12 | 2012-10-24 | 云南滇新能源有限公司 | Failure self-checking device of solar water level monitoring equipment |
| CN103280889A (en) * | 2013-05-23 | 2013-09-04 | 李本吉 | Power source remote control monitor |
| CN203560130U (en) * | 2013-10-30 | 2014-04-23 | 深圳市晶福源电子技术有限公司 | Control circuit for controlling stepless speed regulation of fan in power supply device |
| CN103775366A (en) * | 2012-10-23 | 2014-05-07 | 深圳市航嘉驰源电气股份有限公司 | Power supply temperature sampling and fan control circuit and power supply device |
| CN204003548U (en) * | 2014-07-04 | 2014-12-10 | 深圳市金威源科技股份有限公司 | A kind of fan control circuitry of temperature regulate speed |
| CN208589914U (en) * | 2018-09-07 | 2019-03-08 | 大山科技有限公司 | A kind of power supply unit of cascade bus power supply |
-
2018
- 2018-09-07 CN CN201811044053.8A patent/CN109039051B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202094895U (en) * | 2011-06-22 | 2011-12-28 | 商丘市电业局永城分局 | Fault indicating optical line terminal |
| CN202501909U (en) * | 2012-03-12 | 2012-10-24 | 云南滇新能源有限公司 | Failure self-checking device of solar water level monitoring equipment |
| CN103775366A (en) * | 2012-10-23 | 2014-05-07 | 深圳市航嘉驰源电气股份有限公司 | Power supply temperature sampling and fan control circuit and power supply device |
| CN103280889A (en) * | 2013-05-23 | 2013-09-04 | 李本吉 | Power source remote control monitor |
| CN203560130U (en) * | 2013-10-30 | 2014-04-23 | 深圳市晶福源电子技术有限公司 | Control circuit for controlling stepless speed regulation of fan in power supply device |
| CN204003548U (en) * | 2014-07-04 | 2014-12-10 | 深圳市金威源科技股份有限公司 | A kind of fan control circuitry of temperature regulate speed |
| CN208589914U (en) * | 2018-09-07 | 2019-03-08 | 大山科技有限公司 | A kind of power supply unit of cascade bus power supply |
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