CN116526834A - Secondary controller applied to secondary side of power converter and operation method thereof - Google Patents
Secondary controller applied to secondary side of power converter and operation method thereof Download PDFInfo
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- CN116526834A CN116526834A CN202210067283.6A CN202210067283A CN116526834A CN 116526834 A CN116526834 A CN 116526834A CN 202210067283 A CN202210067283 A CN 202210067283A CN 116526834 A CN116526834 A CN 116526834A
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- control signal
- power converter
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- secondary side
- gate
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000002347 injection Methods 0.000 claims abstract description 28
- 239000007924 injection Substances 0.000 claims abstract description 28
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims abstract description 7
- 238000004804 winding Methods 0.000 claims description 37
- 230000001360 synchronised effect Effects 0.000 claims description 12
- 238000004378 air conditioning Methods 0.000 claims 3
- 239000003990 capacitor Substances 0.000 description 5
- 230000007423 decrease Effects 0.000 description 5
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000011017 operating method Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- 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
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
- H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/36—Means for starting or stopping converters
-
- 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
Abstract
The invention discloses a secondary controller applied to a secondary side of a power converter and an operation method thereof. The secondary controller includes a control signal generation circuit and a gate control signal generation circuit. The gate control signal generating circuit generates a gate control signal and generates an injection signal according to the gate control signal. The control signal generating circuit generates a gate pulse control signal when the superimposed voltage is smaller than the reference voltage. The superimposed voltage is related to the output voltage of the power converter and the injection signal, and the gate control signal generating circuit further generates a gate pulse signal according to the gate pulse control signal so as to turn on the primary side of the power converter. Therefore, since the primary side of the power converter is turned on by the superimposed voltage, ripple of the feedback voltage does not occur in groups and audio noise does not occur in the power converter when the output voltage is lower than the target voltage.
Description
Technical Field
The present invention relates to a secondary controller applied to a secondary side of a power converter and an operating method thereof, and more particularly, to a secondary controller capable of operating a superimposed voltage when a capacitor coupled to the secondary side of the power converter has a low series internal resistance value so that ripple on a feedback voltage of the secondary side of the power converter does not occur in groups and the power converter does not generate audio noise, and an operating method thereof.
Background
In the prior art, when a ground capacitor (e.g., a solid state capacitor) coupled to the secondary side of the power converter has a low series internal resistance (electrical series internal resistance), a feedback voltage received by a secondary controller applied to the secondary side of the power converter will have a smaller ripple, wherein the feedback voltage is related to an output voltage of the secondary side of the power converter. When the output voltage of the secondary side of the power converter is lower than a target voltage, the secondary controller of the secondary side of the power converter enables the primary controller of the primary side of the power converter to turn on the power switch of the primary side of the power converter according to the feedback voltage, so that the primary side of the power converter is transmitted to the secondary side of the power converter to boost the output voltage. However, the operating frequency of the power switch may rise rapidly in a short time because the feedback voltage has small ripple, resulting in a ripple of the feedback voltage that is clustered and audio noise of the power converter. Therefore, how to solve the drawbacks of the prior art has become an important issue for the designer of the secondary controller.
Disclosure of Invention
An embodiment of the invention discloses a secondary controller applied to a secondary side of a power converter. The secondary controller comprises a control signal generating circuit and a grid control signal generating circuit. The gate control signal generating circuit is used for generating a gate control signal and generating an injection signal according to the gate control signal. The control signal generating circuit is coupled to the output end of the secondary side of the power converter and the grid control signal generating circuit, and is used for generating a grid pulse control signal when a superposition voltage is smaller than a reference voltage, wherein the superposition voltage is related to the output voltage of the power converter and the injection signal, the grid control signal generating circuit is additionally used for generating a grid pulse signal according to the grid pulse control signal, and the grid pulse signal is used for enabling the primary side of the power converter to be turned on.
Another embodiment of the present invention discloses an operation method of a secondary controller applied to a secondary side of a power converter, the secondary controller including a control signal generating circuit and a gate control signal generating circuit. The operation method comprises the steps that the grid control signal generating circuit generates a grid control signal and generates an injection signal according to the grid control signal; the control signal generating circuit generates a superposition voltage according to the output voltage of the power converter and the injection signal; when the superimposed voltage is larger than a reference voltage, the control signal generating circuit generates a short-circuit control signal to a short-circuit winding switch after the grid control signal so that the short-circuit winding switch is turned on according to the short-circuit control signal; when the superimposed voltage is smaller than the reference voltage, the control signal generating circuit generates a grid pulse control signal; and the grid control signal generating circuit generates a grid pulse signal according to the grid pulse control signal, wherein the grid pulse signal is used for enabling the primary side of the power converter to be started.
The invention discloses a secondary controller applied to a secondary side of a power converter and an operation method thereof. The secondary controller and the operation method utilize a superimposed voltage (related to ripple on the feedback voltage of the secondary side of the power converter and larger than ripple on the feedback voltage) to control the primary side of the power converter to turn on, so when the output voltage of the secondary side of the power converter is lower than a target voltage, the operation frequency of the primary side power switch of the power converter will not rise rapidly in a short time because the superimposed voltage is larger than the ripple on the feedback voltage. Therefore, compared with the prior art, since the secondary controller disclosed by the invention uses the superimposed voltage to enable the primary controller to control the primary side of the power converter to be turned on, rather than directly using the feedback voltage to enable the primary controller to control the primary side of the power converter to be turned on, when the output voltage of the secondary side of the power converter is lower than the target voltage, ripple of the feedback voltage does not occur in groups and audio noise does not occur in the power converter.
Drawings
Fig. 1 is a schematic diagram of a secondary controller applied to a secondary side of a power converter according to a first embodiment of the present invention.
FIG. 2 is a schematic diagram illustrating feedback voltage, reference voltage, gate control signal, injection signal and superimposed voltage.
Fig. 3 is a flowchart of an operation method of a secondary controller applied to a secondary side of a power converter according to a second embodiment of the present invention.
Wherein reference numerals are as follows:
100. power converter
101. Capacitance device
102. Synchronous switch
103. Voltage dividing circuit
104. Power switch
106. Short-circuit winding switch
108. Secondary side winding
110. Primary side winding
112. Primary side auxiliary winding
114. Primary controller
115. Resistor
200. Secondary controller
202. Control signal generating circuit
206. Gate control signal generating circuit
2022. Current source
2024. Comparator with a comparator circuit
2026. Logic unit
2028. Switch
Circle A
GCS gate control signal
GPCS gate pulse control signal
GPS gate pulse signal
IPRI primary side current
IS injection signal
IC injection current
PGCS primary side Gate control Signal
PRI primary side
SEC secondary side
SCS short-circuit control signal
SV superimposed voltage
T1, T2, T3 time
VSW secondary side voltage
VFB feedback voltage
VOUT output voltage
VC voltage
VD detection voltage
VIN input Voltage
VREF reference voltage
300-312 steps
Detailed Description
Referring to fig. 1, fig. 1 is a schematic diagram of a secondary controller 200 applied to a secondary side SEC of a power converter 100 according to a first embodiment of the present invention, wherein the secondary controller 200 is located at the secondary side SEC of the power converter 100, a capacitor 101 coupled to the secondary side SEC of the power converter 100 has a low series internal resistance value (electrical series internal resistance), the power converter 100 is a flyback power converter (flyback power converter), the secondary controller 200 comprises a control signal generating circuit 202 and a gate control signal generating circuit 206, and the control signal generating circuit 202 is coupled to an output terminal of the secondary side SEC of the power converter 100 and the gate control signal generating circuit 206. In addition, the level of the ground of the primary side PRI of the power converter 100 and the level of the ground of the secondary side SEC of the power converter 100 may be the same or different, and as shown in fig. 1, the input voltage VIN of the primary side PRI of the power converter 100 is generated by rectifying an ac voltage through a bridge rectifier.
As shown in fig. 1, the control signal generating circuit 202 includes a current source 2022, a comparator 2024 and a logic unit 2026. A first input terminal of the comparator 2024 is configured to receive a feedback voltage VFB, wherein the feedback voltage VFB is generated by dividing an output voltage VOUT of the secondary side SEC of the power converter 100 by a voltage dividing circuit 103, and a second input terminal of the comparator 2024 is configured to receive a reference voltage VREF. In addition, the output voltage VOUT has smaller ripple due to the low series internal resistance of the capacitor 101, resulting in smaller ripple on the feedback voltage VFB (as shown in circle a of fig. 2). In addition, as shown in fig. 1, the gate control signal generating circuit 206 may generate an injection signal IS to a switch 2028 in the control signal generating circuit 202 according to a gate control signal GCS generated by the gate control signal generating circuit. Therefore, when the switch 2028 IS turned on, an injection current IC provided by the current source 2022 charges the first input terminal of the comparator 2024, resulting in a superimposed voltage SV at the first input terminal of the comparator 2024, wherein the superimposed voltage SV IS equal to the sum of the ripple on the feedback voltage VFB and the voltage corresponding to the width of the injection signal IS, that IS, the superimposed voltage SV IS greater than the ripple on the feedback voltage VFB, because the superimposed voltage SV IS determined by the width of the feedback voltage VFB and the injection signal IS. In addition, since the feedback voltage VFB is generated by the output voltage VOUT and the voltage divider 103, the superimposed voltage SV is also related to the ripple on the output voltage VOUT. In addition, in an embodiment of the present invention, the width of the injection signal IS may be in a predetermined ratio to the discharge time of the secondary side SEC of the power converter 100. In addition, the gate control signal generating circuit 206 may generate the gate control signal GCS according to the secondary side voltage VSW, wherein the synchronous switch 102 may be turned on according to the gate control signal GCS during the enabling period of the gate control signal GCS, and the enabling period of the gate control signal GCS is related to the discharging time of the secondary side SEC of the power converter 100. In addition, the present invention is not limited to inputting the injection current IC to the first input terminal of the comparator 2024 to generate the superimposed voltage SV, that is, any way of adding a voltage to the feedback voltage VFB during the enabling period of the gate control signal GCS to generate the superimposed voltage SV falls within the scope of the present invention.
As shown in fig. 2, at a time T1, the feedback voltage VFB starts to decrease, resulting in that the superimposed voltage SV also starts to decrease. As shown in fig. 2, at a time T2, the superimposed voltage SV is smaller than the reference voltage VREF. At this time, as shown in fig. 1, the comparator 2024 may cause the logic unit 2026 to turn off a short-circuit control signal SCS and cause the logic unit 2026 to generate a gate pulse control signal GPCS to the gate control signal generating circuit 206 after the gate control signal GCS, wherein the frequency of the logic unit 2026 generating the gate pulse control signal GPCS increases because the superimposed voltage SV is smaller than the reference voltage VREF, which indicates that the feedback voltage VFB is lower (i.e., the output voltage VOUT is lower). In addition, the operation principle of the short-circuit control signal SCS and the short-winding switch 106 receiving the short-circuit control signal SCS can be referred to the disclosure of the U.S. Pat. No. 10756639B2 for the short-circuit control signal SCS and the short-circuit winding switch 106, so that the description thereof is omitted herein. In addition, as shown in fig. 1, the shorting winding switch 106 is coupled to the secondary winding 108 of the power converter 100, and a predetermined time is provided between the gate control signal GCS and the shorting control signal SCS, and the predetermined time may be changed according to the requirements of the designer of the power converter 100. Therefore, the gate control signal generating circuit 206 can generate a gate pulse signal GPS according to the gate pulse control signal GPCS, and the gate pulse signal GPS is used to turn on the primary side PRI of the power converter 100, wherein the primary side PRI of the power converter 100 and the secondary side SEC of the power converter 100 are not turned on at the same time. In addition, the operation principle of the gate pulse signal GPS to turn on the primary side PRI of the power converter 100 may also refer to the disclosure of U.S. Pat. No. 5 (US 10756639B 2), wherein the primary controller 114 may generate the primary gate control signal PGCS to the power switch 104 to turn on the primary side PRI of the power converter 100 according to the change of the secondary side voltage VSW of the power converter 100 during the turn-on period of the gate pulse signal GPS (for example, the synchronous switch 102 of the secondary side SEC of the power converter 100 may be turned on according to the gate pulse signal GPS), and the change of the secondary side voltage VSW generated by the synchronous switch 102 is coupled to the primary side PRI of the power converter 100 through the secondary side winding 108 and the primary side auxiliary winding 112 of the power converter 100.
In addition, as shown in fig. 2, at a time T3, the superimposed voltage SV is greater than the reference voltage VREF. At this time, as shown in fig. 1, the comparator 2024 may cause the logic unit 2026 to turn off the gate pulse control signal GPCS and cause the logic unit 2026 to enable the short-circuit control signal SCS to the short-circuit winding switch 106 to turn on the short-circuit winding switch 106 according to the short-circuit control signal SCS, wherein the frequency of the logic unit 2026 generating the gate pulse control signal GPCS is reduced because the superimposed voltage SV is greater than the reference voltage VREF, which indicates that the feedback voltage VFB is higher (i.e., the output voltage VOUT is higher). Therefore, because the secondary controller 200 uses the superimposed voltage SV (related to the ripple on the feedback voltage VFB and greater than the ripple on the feedback voltage VFB) to control the primary side PRI of the power converter 100 to turn on, when the output voltage VOUT is lower than a target voltage (related to the reference voltage VREF), the operating frequency of the primary side PRI of the power converter 100 will not rise rapidly in a short time because the superimposed voltage SV is greater than the ripple on the feedback voltage VFB, so that the ripple on the feedback voltage VFB will not appear in clusters and the power converter 100 will not generate audio noise. In addition, after the short-circuited winding switch 106 is turned on according to the short-circuit control signal SCS, the secondary-side voltage VSW will not resonate to ensure that the primary-side PRI of the power converter 100 is turned off.
In addition, as shown in fig. 1, the descriptions of the primary winding 110, the secondary winding 108, the voltage VC, the detection voltage VD, the primary current IPRI, and the resistor 115 of the power converter 100 can also be referred to as disclosure of the primary winding 110, the secondary winding 108, the voltage VC, the detection voltage VD, the primary current IPRI, and the resistor 115 in U.S. patent (US 10756639B 2), and thus are not repeated herein.
Referring to fig. 1-3, fig. 3 is a flowchart illustrating an operation method of a secondary controller applied to a secondary side of a power converter according to a second embodiment of the present invention. The method of operation of fig. 3 is illustrated using the power converter 100, secondary controller 200, and primary controller 114 of fig. 1, with the following detailed steps:
step 300: starting;
step 302: during the turn-on period of the secondary side SEC of the power converter 100 after the primary side PRI of the power converter 100 IS turned off, the gate control signal generating circuit 206 generates the gate control signal GCS according to the secondary side voltage VSW of the secondary side SEC of the power converter 100, and generates the injection signal IS according to the gate control signal GCS;
step 304: the control signal generating circuit 202 generates a superimposed voltage SV according to the output voltage VOUT of the power converter 100 and the injection signal IS;
step 306: whether the superimposed voltage SV is greater than the reference voltage VREF; if so, go to step 308; if so, go to step 310;
step 308: the control signal generating circuit 202 generates a short-circuit control signal SCS to the short-circuit winding switch 106 to enable the short-circuit winding switch 106 to be turned on according to the short-circuit control signal SCS, and the process returns to step 302;
step 310: the control signal generation circuit 202 generates a gate pulse control signal GPCS;
step 312: the gate control signal generating circuit 206 generates the gate pulse signal GPS according to the gate pulse control signal GPCS to turn on the primary side PRI of the power converter 100, and jumps back to step 302.
In step 302, after the primary side PRI of the power converter 100 is turned on, the primary controller 114 may determine whether to turn off the primary side PRI of the power converter 100 according to the detected voltage VD, wherein the secondary side voltage VSW of the secondary side SEC of the power converter 100 varies with the turn-on of the primary side PRI of the power converter 100. During the turn-on period of the secondary side SEC of the power converter 100 after the primary side PRI of the power converter 100 IS turned off, the gate control signal generating circuit 206 may generate the gate control signal GCS according to the secondary side voltage VSW of the secondary side SEC of the power converter 100, and generate the injection signal IS to the switch 2028 in the control signal generating circuit 202 according to the gate control signal GCS.
In step 304, when the switch 2028 IS turned on, the injection current IC provided by the current source 2022 charges the first input terminal of the comparator 2024, resulting in a superimposed voltage SV on the first input terminal of the comparator 2024, wherein the superimposed voltage SV IS equal to the sum of the ripple on the feedback voltage VFB and the voltage corresponding to the width of the injection signal IS, that IS, the superimposed voltage SV IS greater than the ripple on the feedback voltage VFB, because the superimposed voltage SV IS determined by the width of the feedback voltage VFB and the injection signal IS. In addition, in an embodiment of the present invention, the width of the injection signal IS may be in a predetermined ratio to the discharge time of the secondary side SEC of the power converter 100.
In step 308, as shown in fig. 2, at time T3, because the superimposed voltage SV is greater than the reference voltage VREF, the control signal generating circuit 202 will turn off the gate pulse control signal GPCS and generate the short-circuit control signal SCS to the short-circuit winding switch 106 at time T3 to turn on the short-circuit winding switch 106 according to the short-circuit control signal SCS. In addition, the predetermined time is provided between the gate control signal GCS and the short control signal SCS, and may be changed according to the needs of the designer of the power converter 100. Therefore, as shown in fig. 2, after the shorted winding switch 106 is turned on, the secondary side voltage VSW will not resonate to ensure that the primary side PRI of the power converter 100 is turned off. In addition, after the shorting winding switch 106 is turned on, when the load coupled to the secondary side SEC of the power converter 100 suddenly becomes heavy such that the output voltage VOUT of the power converter 100 decreases to cause the superimposed voltage SV to be smaller than the reference voltage VREF, the control signal generating circuit 202 generates the gate pulse control signal GPCS to the gate control signal generating circuit 206. The gate control signal generation circuit 206 will then generate the gate pulse signal GPS according to the gate pulse control signal GPCS to turn on the primary side PRI of the power converter 100.
In step 310, as shown in fig. 2, at time T1, the feedback voltage VFB starts to decrease, resulting in the superimposed voltage SV also starting to decrease. As shown in fig. 2, at time T2, the superimposed voltage SV is initially smaller than the reference voltage VREF. At this time, as shown in fig. 1, the control signal generating circuit 202 may turn off the short-circuit control signal SCS and generate the gate pulse control signal GPCS to the gate control signal generating circuit 206 after the gate control signal GCS, wherein the frequency of the logic unit 2026 generating the gate pulse control signal GPCS increases because the superimposed voltage SV is smaller than the reference voltage VREF, which indicates that the feedback voltage VFB is lower (i.e. the output voltage VOUT is lower). Therefore, in step 312, the gate control signal generating circuit 206 may generate the gate pulse signal GPS according to the gate pulse control signal GPCS, and the gate pulse signal GPS is used to turn on the primary side PRI of the power converter 100, wherein the primary side PRI of the power converter 100 and the secondary side SEC of the power converter 100 are not turned on at the same time.
In summary, the secondary controller and the operation method thereof for the secondary side of the power converter disclosed in the present invention utilize the superimposed voltage (related to the ripple on the feedback voltage and greater than the ripple on the feedback voltage) to control the primary side of the power converter to turn on, so that when the output voltage is lower than the target voltage (related to the reference voltage), the operation frequency of the primary side power switch of the power converter will not rise rapidly in a short time because the superimposed voltage is greater than the ripple on the feedback voltage. Therefore, compared with the prior art, since the secondary controller disclosed by the invention uses the superimposed voltage to enable the primary controller to control the primary side of the power converter to be turned on, rather than directly using the feedback voltage to enable the primary controller to control the primary side of the power converter to be turned on, when the output voltage of the secondary side of the power converter is lower than the target voltage, ripple of the feedback voltage does not occur in groups and audio noise does not occur in the power converter.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (17)
1. A secondary controller for use on a secondary side of a power converter, comprising:
a gate control signal generating circuit for generating a gate control signal and generating an injection signal according to the gate control signal; a kind of electronic device with high-pressure air-conditioning system
The control signal generating circuit is coupled to the output end of the secondary side of the power converter and the grid control signal generating circuit and is used for generating a grid pulse control signal when a superposition voltage is smaller than a reference voltage, wherein the superposition voltage is related to the output voltage of the power converter and the injection signal, the grid control signal generating circuit is additionally used for generating a grid pulse signal according to the grid pulse control signal, and the grid pulse signal is used for enabling the primary side of the power converter to be started.
2. The secondary controller of claim 1 wherein the control signal generating circuit is further configured to generate a short circuit control signal to a short circuit winding switch after the gate control signal to turn on the short circuit winding switch according to the short circuit control signal when the superimposed voltage is greater than a reference voltage.
3. The secondary controller of claim 2 wherein there is a predetermined time between said gate control signal and said short circuit control signal.
4. The secondary controller of claim 2 wherein the control signal generating circuit is further configured to turn off the short circuit control signal when the superimposed voltage is less than the reference voltage.
5. The secondary controller of claim 1 wherein the power converter is a flyback power converter.
6. The secondary controller of claim 1 wherein the primary side of the power converter is turned off during the time that the shorted winding switch is on.
7. The secondary controller of claim 1, wherein a synchronous switch on a secondary side of the power converter is turned on according to the gate pulse signal, and a change in a secondary side voltage of the secondary side of the power converter due to the turn-on of the synchronous switch causes the primary side of the power converter to turn on through a secondary side winding and a primary side auxiliary winding of the power converter coupled to the primary side of the power converter during the turn-on of the gate pulse signal.
8. The secondary controller of claim 1 wherein the gate control signal generation circuit further generates the gate control signal based on a secondary side voltage of a secondary side of the power converter, and a synchronous switch of the secondary side of the power converter is turned on based on the gate control signal.
9. The secondary controller of claim 8 wherein the width of the injection signal is in a predetermined ratio to the discharge time of the secondary side of the power converter when the synchronous switch is turned on according to the gate control signal.
10. The secondary controller of claim 1, wherein the shorting winding switch is coupled to a secondary side winding of the power converter.
11. A method of operating a secondary controller for a secondary side of a power converter, the secondary controller comprising a control signal generation circuit and a gate control signal generation circuit, the method comprising:
the grid control signal generating circuit generates a grid control signal and generates an injection signal according to the grid control signal;
the control signal generating circuit generates a superposition voltage according to the output voltage of the power converter and the injection signal;
when the superimposed voltage is larger than a reference voltage, the control signal generating circuit generates a short-circuit control signal to a short-circuit winding switch after the grid control signal so that the short-circuit winding switch is turned on according to the short-circuit control signal;
when the superimposed voltage is smaller than the reference voltage, the control signal generating circuit generates a grid pulse control signal; a kind of electronic device with high-pressure air-conditioning system
The grid control signal generating circuit generates a grid pulse signal according to the grid pulse control signal, wherein the grid pulse signal is used for enabling the primary side of the power converter to be turned on.
12. The method of operation of claim 11 wherein the primary side of the power converter is turned off during the time that the shorted winding switch is on.
13. The method of claim 11, wherein the gate pulse signal is used to turn on the primary side of the power converter comprises:
a synchronous switch on the secondary side of the power converter is turned on according to the grid pulse signal; a kind of electronic device with high-pressure air-conditioning system
During the enabling of the gate pulse signal, a change in a secondary side voltage of a secondary side of the power converter due to the turning on of the synchronous switch is coupled to a primary side of the power converter through a secondary side winding and a primary side auxiliary winding of the power converter to turn on the primary side of the power converter.
14. The method of operation of claim 11, wherein said gate control signal and said short circuit control signal have a predetermined time therebetween.
15. The method of claim 11, wherein the control signal generating circuit is further configured to turn off the short circuit control signal when the superimposed voltage is less than the reference voltage.
16. The method of claim 11, wherein during a turn-on period of a secondary side of the power converter, the gate control signal generating circuit generates the gate control signal according to a secondary side voltage of the secondary side of the power converter, and a synchronous switch of the secondary side of the power converter is turned on according to the gate control signal.
17. The method of operation of claim 16, wherein a width of the injection signal and a discharge time of a secondary side of the power converter are in a predetermined ratio when the synchronous switch is turned on according to the gate control signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210067283.6A CN116526834A (en) | 2022-01-20 | 2022-01-20 | Secondary controller applied to secondary side of power converter and operation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210067283.6A CN116526834A (en) | 2022-01-20 | 2022-01-20 | Secondary controller applied to secondary side of power converter and operation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116526834A true CN116526834A (en) | 2023-08-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210067283.6A Pending CN116526834A (en) | 2022-01-20 | 2022-01-20 | Secondary controller applied to secondary side of power converter and operation method thereof |
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| Country | Link |
|---|---|
| CN (1) | CN116526834A (en) |
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2022
- 2022-01-20 CN CN202210067283.6A patent/CN116526834A/en active Pending
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