CN114024446B - Switching module, voltage stabilization control method and related device - Google Patents
Switching module, voltage stabilization control method and related device Download PDFInfo
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- CN114024446B CN114024446B CN202210013828.5A CN202210013828A CN114024446B CN 114024446 B CN114024446 B CN 114024446B CN 202210013828 A CN202210013828 A CN 202210013828A CN 114024446 B CN114024446 B CN 114024446B
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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
- 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
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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
- H02M1/32—Means for protecting converters other than automatic disconnection
Abstract
The embodiment of the application provides a switching module, a voltage stabilization control method and a related device, wherein the switching module is applied to an isolated power supply, the isolated power supply comprises a direct current bus, an output bus, a fan power supply module and a switching module, and the switching module is configured with a first input port, a second input port and a first output port; the first input port is connected with the direct current bus and used for accessing a first voltage output by the direct current bus; the second input port is connected with the output bus and used for accessing a second voltage output by the output bus; the first output port is connected with the fan power supply module and used for transmitting the first voltage or the second voltage to the fan power supply module, and the switching module comprises a main control unit, a staggered wave transmitting unit, a first switch unit and a second switch unit. This application switches first switch unit and second switch unit through the crisscross ripples unit of sending of control when judging output voltage and be greater than predetermineeing output voltage for the output bus provides the load, realizes the no-load steady voltage to isolation power.
Description
Technical Field
The application belongs to the field of isolated power supply voltage stabilization control, and particularly relates to a switching module, a voltage stabilization control method and a related device.
Background
At present, due to the popularization of new energy automobiles, the charging voltage of the new energy automobiles comprises 20-900Vdc of the charging voltage of forklifts, ferry vehicles, passenger vehicles in medium-voltage areas, passenger vehicles in high-voltage areas, buses, mud-headed vehicles and the like, and the requirement is brought to the output voltage range of an isolation power supply in a charging pile.
However, for the existing isolation power supply with an ultra-wide output voltage range, due to the coupling capacitor generated by the switch tube and the isolation transformer, the voltage smaller than the coupling capacitor is not controlled when the isolation power supply is in no-load.
Disclosure of Invention
The embodiment of the application provides a series switching module, a voltage stabilization control method and a related device, so as to realize no-load voltage stabilization of an isolated power supply.
In a first aspect, an embodiment of the present application provides a switching module, which is applied to an isolated power supply, where the isolated power supply includes a dc bus, an output bus, a fan power supply module, and a switching module, and the switching module is configured with a first input port, a second input port, and a first output port; the first input port is connected with the direct current bus and used for accessing a first voltage output by the direct current bus; the second input port is connected with the output bus and used for accessing a second voltage output by the output bus; the first output port is connected with the fan power supply module and used for transmitting the first voltage or the second voltage to the fan power supply module; the switching module includes: the main control unit is used for detecting the output voltage of the output bus and outputting a first control signal when the output voltage is judged to be greater than a preset output voltage; the staggered wave sending unit is used for receiving a first control signal of the main control unit and outputting a first low level and a first high level according to the first control signal; the first switch unit is connected with the first output port and the first input port, and is used for receiving the first low level and disconnecting a loop of the fan power supply module and the direct-current bus according to the first low level; and the second switch unit is connected with the first output port and the second input port, and is used for receiving the first high level and conducting a loop of the fan power supply module and the output bus according to the first high level.
In a second aspect, an embodiment of the present application provides an isolated power supply, including: the rectifying circuit is used for accessing alternating current and rectifying alternating voltage into direct voltage; the power factor correction circuit is connected with the rectifying circuit and is used for carrying out power factor correction on the direct-current voltage; the direct current bus is connected with the power factor circuit and used for limiting the size of direct current voltage subjected to power factor correction; the DCDC isolation circuit is connected with the direct current bus and used for regulating the direct current voltage output by the direct current bus to obtain output voltage; the output bus is connected with the DCDC isolation circuit and used for outputting the output voltage; the fan power supply module is used for supplying power to the fan under the power supply of the direct current bus or the output bus; the switching module of the first aspect, configured with a first input port, a second input port, and a first output port; the first input port is connected with the direct current bus and used for accessing a first voltage output by the direct current bus; the second input port is connected with the output bus and used for accessing a second voltage output by the output bus; the first output port is connected with the fan power supply module and used for transmitting the first voltage or the second voltage to the fan power supply module.
In a third aspect, an embodiment of the present application provides a voltage stabilization control method, which is applied to a main control unit in a switching module of an isolated power supply, where the isolated power supply includes a dc bus, an output bus, a fan power supply module, and a switching module, and the switching module is configured with a first input port, a second input port, and a first output port; the first input port is connected with the direct current bus and used for accessing a first voltage output by the direct current bus; the second input port is connected with the output bus and used for accessing a second voltage output by the output bus; the first output port is connected with the fan power supply module and used for transmitting the first voltage or the second voltage to the fan power supply module; the switching module comprises a main control unit, a staggered wave transmitting unit, a first switch unit and a second switch unit, wherein the main control unit is connected with the staggered wave transmitting unit, the staggered wave transmitting unit is respectively connected with the first switch unit and the second switch unit, the first switch unit is connected with the first output port and the first input port, and the second switch unit is connected with the first output port and the second input port; the method comprises the following steps: detecting an output voltage of the output bus; and outputting a first control signal when the output voltage is judged to be greater than the preset output voltage, wherein the first control signal is used for controlling the interleaved wave-sending unit to output a first low level and a first high level, the first low level is used for controlling the first switch unit to disconnect a loop of the fan power supply module and the direct-current bus, and the first high level is used for connecting the loop of the fan power supply module and the output bus.
In a fourth aspect, an embodiment of the present application provides an electronic device, including a processor, a memory, a communication interface, and one or more programs, stored in the memory and configured to be executed by the processor, the programs including instructions for performing the steps of any of the first to third aspects of the embodiments of the present application.
In a fifth aspect, an embodiment of the present application provides a computer storage medium, which is characterized by storing a computer program for electronic data exchange, wherein the computer program causes a computer to perform some or all of the steps described in any one of the first aspect to the third aspect of the present embodiment.
In a sixth aspect, the present application provides a computer program product, where the computer program product includes a non-transitory computer-readable storage medium storing a computer program, where the computer program is operable to cause a computer to perform some or all of the steps as described in any of the first to third aspects of the embodiments of the present application. The computer program product may be a software installation package.
It can be seen that, in the embodiment of the present application, the switching module is applied to an isolated power supply, where the isolated power supply includes a dc bus, an output bus, a fan power supply module, and a switching module, and the switching module is configured with a first input port, a second input port, and a first output port; the first input port is connected with the direct current bus and used for accessing a first voltage output by the direct current bus; the second input port is connected with the output bus and used for accessing a second voltage output by the output bus; the first output port is connected with the fan power supply module and used for transmitting the first voltage or the second voltage to the fan power supply module, and the switching module comprises a main control unit, a staggered wave transmitting unit, a first switch unit and a second switch unit. This application switches first switch unit and second switch unit through the crisscross ripples unit of sending of control when judging output voltage and be greater than predetermineeing output voltage for the output bus provides the load, realizes the no-load steady voltage to isolation power.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an isolated power supply provided in an embodiment of the present application;
fig. 2 is a schematic structural diagram of a switching module according to an embodiment of the present disclosure;
fig. 3 is a schematic flow chart of a voltage stabilization control method according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms "first," "second," and the like in the description and claims of the present application and in the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
The following description will first be made with respect to terms related to the present application.
Coupling capacitance: also known as electric field coupling or electrostatic coupling, is a coupling mode generated due to the existence of distributed capacitance. The coupling capacitor enables a strong current system and a weak current system to be coupled and isolated through the capacitor, a high-frequency signal channel is provided, low-frequency current is prevented from entering the weak current system, and personal safety is guaranteed. Besides the functions, the coupling capacitor with the voltage extraction device can extract power frequency voltage for protection and reclosing, and plays a role of a voltage transformer. There are various coupling methods.
At present, due to the popularization of new energy automobiles, the charging voltage of the new energy automobiles comprises 20-900Vdc of the charging voltage of forklifts, ferry vehicles, passenger vehicles in medium-voltage areas, passenger vehicles in high-voltage areas, buses, mud-headed vehicles and the like, and the requirement is brought to the output voltage range of an isolation power supply in a charging pile. However, for the existing isolation power supply with an ultra-wide output voltage range, due to the coupling capacitor generated by the switch tube and the isolation transformer, the voltage smaller than the coupling capacitor is not controlled when the isolation power supply is in no-load.
In order to solve the foregoing problem, an embodiment of the present application provides a switching module. The switching module can be applied to a scene that the output voltage of the isolation power supply is not controlled when the isolation power supply is in a no-load state, and controls the staggered wave sending unit to switch the first switch unit and the second switch unit when the output voltage is judged to be larger than the preset output voltage, so that a load is provided for an output bus, and no-load voltage stabilization of the isolation power supply is realized. The switching module in the present application may also be applied to other application scenarios, which are not limited herein.
The system architecture according to the embodiments of the present application is described below.
Referring to fig. 1, the present application provides an isolated power supply 10, where the isolated power supply 10 includes: a rectifying circuit 110 for receiving ac power and rectifying the ac voltage into dc voltage; a power factor correction circuit 120 connected to the rectifying circuit 110 for performing power factor correction on the dc voltage; the direct current bus 130 is connected with the power factor circuit and used for limiting the size of direct current voltage subjected to power factor correction; the DCDC isolation circuit 140 is connected to the dc bus 130, and configured to regulate the dc voltage output by the dc bus 130 to obtain an output voltage; an output bus 150 connected to the DCDC isolation circuit 140 for outputting the output voltage; the fan power supply module 160 is used for supplying power to the fan under the power supply of the direct current bus 130 or the output bus 150; and a switching module 170, the switching module 170 configured with a first input port, a second input port, and a first output port; the first input port is connected to the dc bus 130 and is used for accessing a first voltage output by the dc bus 130; the second input port is connected to the output bus 150 and is used for accessing a second voltage output by the output bus 150; the first output port is connected to the fan power supply module 160, and is configured to transmit the first voltage or the second voltage to the fan power supply module 160.
The switching module 170 is configured to detect an output voltage of the output bus 150, and output a first low level and a first high level when determining that the output voltage is greater than a preset output voltage; and according to the first low level, the loop between the fan power supply module 160 and the dc bus 130 is disconnected; and conducting the loops of the fan power supply module 160 and the output bus 150 according to the first high level, so as to provide a load for the output bus 150, thereby realizing no-load voltage stabilization of the isolated power supply 10.
Illustratively, the pfc circuit 120 is a three-phase VIENNA pfc circuit 120, which is a front stage of the isolated power supply 10.
Illustratively, the DCDC isolation circuit 140 is a phase-shifted full-bridge DC-DC circuit, which is used as a subsequent stage of the isolated power supply 10.
In the specific implementation, the topology structure of the isolation power supply 10 adopts a front-stage VIENNA PFC + phase-shifted full-bridge DCDC topology, the two stages have dc bus 130 capacitance decoupling, the DCDC isolation circuit 140 has an isolation function, and has the capability of adapting to wide input voltage range and wide output voltage range adjustment, under the working conditions of input high voltage and output low voltage, in order to prevent the voltage difference between the input and the dc bus 130 from being too large, so that the large-amplitude jump of the voltage damages the internal devices, the voltage of the dc bus 130 can be adjusted to a reasonable range, for example, a lowest voltage Vbus-min of the dc bus 130 is set, so that the voltage of the dc bus 130 can generate a coupling voltage Vc on the secondary parasitic capacitor through the DCDC isolation transformer. The coupling voltage Vc is greater than the lowest voltage of the module output, so that the voltage range of the isolated power supply 10 below the coupling voltage Vc is uncontrolled and non-adjustable. In this regard, when the switching module 170 determines that the output voltage is greater than the preset output voltage, the power supply of the fan power supply module 160 is switched from the dc bus 130 to the output bus 150 to provide a load for the output bus 150, so as to implement no-load voltage stabilization of the isolated power supply 10.
The switching module is described below.
Referring to fig. 2, the present application provides a switching module 170, which can be applied to the isolated power supply 10, where the switching module 170 includes:
the main control unit 171 is configured to detect an output voltage of the output bus 150, and output a first control signal when it is determined that the output voltage is greater than a preset output voltage;
an interleaving wave-sending unit 172, configured to receive the first control signal of the main control unit 171, and output a first low level and a first high level according to the first control signal;
a first switch unit 173, connected to the first output port and the first input port, for receiving the first low level and disconnecting the fan power supply module 160 from the loop of the dc bus 130 according to the first low level;
and a second switch unit 174, connected to the first output port and the second input port, for receiving the first high level and turning on a loop between the fan power supply module 160 and the output bus 150 according to the first high level.
For example, the main control unit 171 may be a processor, such as an MCU, a CPU, and the like, and is not limited herein.
For example, the interleaving wave-sending unit 172 may include a first driving circuit for outputting a first low level to control the first switch unit to be turned off, and a second driving circuit for outputting a first high level to control the second switch unit to be turned on. It is understood that the staggered wave-sending unit may be other structures capable of achieving the same function, and is not limited herein.
For example, the first switch unit 173 and the second switch unit 174 may be any switches, such as electronic switches (e.g., the switch S1 and the switch S2 shown in fig. 2), and are not limited herein.
In a specific implementation, in a normal working state of the isolation power supply 10, the coupling voltage Vc is coupled out through a junction capacitor of the switching tube and a parasitic capacitor on the secondary side of the isolation transformer of the primary-secondary-side interlayer capacitor of the isolation transformer. When the coupling voltage Vc is greater than the preset output voltage, the voltage on the output bus 150 is Vc when the isolated power supply 10 is not loaded. Therefore, when the main control unit 171 detects that the output voltage is greater than the preset output voltage, it outputs a first control signal to the interleaving wave-sending unit 172. The interleaved wave-sending unit 172 is configured with two output terminals (respectively referred to as a first output terminal and a second output terminal) and one input terminal, the input terminal of the interleaved wave-sending unit 172 receives the first control signal, outputs a first low level from the first output terminal to the first switch unit 173 according to the first control signal, and outputs a second high level from the second output terminal to the second switch unit 174. The first switch unit 173 is controlled by the first low level to disconnect the loop of the fan power supply module 160 from the dc bus 130, and the second switch unit 174 is controlled by the first high level to connect the loop of the fan power supply module 160 to the output bus 150, so that the fan power supply module 160 is switched from the dc bus 130 to the output bus 150, and further provides a load for the output bus 150, and releases the energy of the coupling capacitor, and finally stabilizes the output voltage of the output bus 150 at the preset output voltage.
It can be seen that in the present embodiment, the first switch unit 173 and the second switch unit 174 are switched by controlling the staggered wave-generating unit 172 when the output voltage is determined to be greater than the preset output voltage, so as to provide a load for the output bus 150, thereby realizing no-load voltage stabilization of the isolated power supply 10.
In a possible embodiment, the main control unit 171 is further configured to: acquiring junction capacitance of a switching tube in the isolation power supply 10; calculating interlayer capacitances of a primary side and a secondary side of an isolation transformer of a DCDC isolation circuit 140 in the isolation power supply 10; calculating the parasitic capacitance of the secondary side of the isolation transformer of the DCDC isolation circuit 140 in the isolation power supply 10; predicting a coupling capacitance value according to the junction capacitance, the interlayer capacitance and the parasitic capacitance; comparing the coupling capacitance value with the preset output voltage; and if the coupling capacitance value is greater than the preset output voltage, outputting a first control signal.
In a specific implementation, the coupling voltage Vc is obtained by coupling the junction capacitance, the interlayer capacitance, and the parasitic capacitance. Therefore, the coupling capacitance value can be predicted according to the junction capacitance, the interlayer capacitance and the parasitic capacitance at the current moment, and when the predicted coupling capacitance value is larger than the preset output voltage value, the first control signal is sent to the interleaving wave.
Specifically, the junction capacitance of the switching tube is determined by the switching speed of the switching tube, and the higher the switching speed, the smaller the junction capacitance of the switching tube is, so that the size of the corresponding junction capacitance can be determined according to the physical property of the switching tube. And the interlayer capacitance is the sum of the capacitance between every two adjacent layers of coils of the primary winding and the sum of the capacitance between every two adjacent layers of coils of the secondary winding. Further, applying an excitation signal with variable frequency to the isolation transformer through a signal generator, and acquiring a voltage signal and a current signal of a primary winding of the isolation transformer by an oscilloscope; acquiring the natural resonant frequency of the isolation transformer according to the Lissajous figures of the voltage signal and the current signal displayed by the oscilloscope; the natural resonant frequency comprises a parallel resonant frequency f1 and a series resonant frequency f2 when the secondary side of the isolation transformer is open-circuited, and a parallel resonant frequency f3 when the secondary side of the isolation transformer is short-circuited; calculating the excitation inductance Lm of the primary winding of the isolation transformer and the leakage inductance Ls of the secondary winding; and calculating the parasitic capacitance of the isolation transformer according to the natural resonant frequency, the excitation inductance Lm and the leakage inductance Ls. Or the self-capacitance C1 of the primary winding, the self-capacitance C2 of the secondary winding, and the capacitance C3 between the primary winding and the secondary winding of the parasitic capacitance may be calculated separately, and the self-capacitance of the primary winding, the self-capacitance of the secondary winding, and the capacitance between the primary winding and the secondary winding are added to obtain the parasitic capacitance. It can be seen that the present embodiment enables the timing of outputting the first control signal to be determined by predicting the coupling capacitance value.
In a possible embodiment, after outputting the first control signal, the main control unit 171 is further configured to: calculating a first time required to release the energy of the coupling capacitor; after the first time, a second control signal is output to control the output of the interleaving wave-sending unit 172 to have a second high level and a second low level.
And the port outputting the second high level is the same as the port outputting the first low level, and the port outputting the second low level is the same as the port outputting the first high level.
In a specific implementation, in order to avoid the situation that the fan power supply module 160 is powered by the output bus 150 for a long time, after the energy of the coupling capacitor is released, the power supply of the fan power supply module 160 needs to be switched to the dc bus 130. Thus, the first time required to discharge the coupling capacitor energy needs to be pre-calculated. Specifically, the time required to release the energy of the coupling capacitor energy may be calculated by the power of the fan power module 160.
It can be seen that, in this embodiment, the power supply of the fan power supply module 160 is restored after the coupling capacitor is eliminated, and the fan power supply module 160 is prevented from being in the power supply state of the output bus 150 for a long time, so that the working power of the fan is insufficient.
In a possible embodiment, after comparing the coupling capacitance value with the preset output voltage, the main control unit 171 is further configured to: and if the coupling capacitance value is less than or equal to the preset output voltage, outputting a second control signal.
In a specific implementation, when the coupling capacitance value is less than or equal to the preset output voltage, it indicates that the current output bus 150 outputs a normal output voltage, and the output bus 150 does not have a condition that the output voltage is not controlled, so that the interleaving wave-generating unit 172 outputs a second control signal or maintains a default control state, so that the interleaving wave-generating unit 172 maintains the default state in which the dc bus 130 supplies power to the fan power supply module 160.
It can be seen that in the present embodiment, it is achieved that the default state of the dc bus 130 for supplying power to the fan power supply module 160 is maintained when there is no uncontrolled output voltage.
In a possible embodiment, the main control unit 171 is further configured to: and outputting a second control signal to the interleaving wave-sending unit 172 after detecting that the isolated power supply 10 is turned off or powered off.
In a specific implementation, the isolation power supply 10 is shut down or the power-off coupling capacitor is released, and the output bus 150 does not have the condition that the output voltage is not controlled, so that the interleaving wave-transmitting unit 172 outputs the second control signal or keeps the default control state, so that the interleaving wave-transmitting unit 172 keeps the default state that the dc bus 130 supplies power to the fan power-supplying module 160.
It can be seen that in the present embodiment, the default state of the dc bus 130 supplying power to the fan power supply module 160 is restored when the isolated power supply 10 is turned off or power is cut off.
In one possible embodiment, the interleaving wave-sending unit 172 is further configured to: receiving a second control signal of the main control unit 171, and outputting a second high level and a second low level according to the second control signal, wherein a port outputting the second high level is the same as a port outputting the first low level, and a port outputting the second low level is the same as a port outputting the first high level.
For example, the first driving circuit is configured to output a second high level to control the first switching unit to be turned on, and the second determining circuit is configured to output a second low level to control the second switching unit to be turned off.
In a specific implementation, after receiving the second control signal, the interleaved wave-transmitting unit 172 converts the first low level of the first output port into the second high level for output, converts the first high level of the second output port into the second low level for output, and then enters a default state where the dc bus 130 supplies power to the fan power supply module 160.
It can be seen that in the present embodiment, the response of the interleaved wave generation unit 172 to the second control signal is realized.
The specific method is described in detail below.
Referring to fig. 3, the present application provides a voltage stabilization control method applied to a main control unit in the switching module of the isolated power supply; the method comprises the following steps:
The first control signal is used for controlling the interleaved wave-sending unit to output a first low level and a first high level, the first low level is used for controlling the first switch unit to disconnect a loop of the fan power supply module and the direct-current bus, and the first high level is used for conducting the loop of the fan power supply module and the output bus.
In one possible embodiment, after the detecting the output voltage of the output bus, the method further includes:
obtaining junction capacitance of a switch tube in the isolation power supply;
calculating interlayer capacitances of a primary side and a secondary side of an isolation transformer of a DCDC isolation circuit in the isolation power supply;
calculating the parasitic capacitance of the secondary side of an isolation transformer of a DCDC isolation circuit in the isolation power supply;
predicting a coupling capacitance value according to the junction capacitance, the interlayer capacitance and the parasitic capacitance;
comparing the coupling capacitance value with the preset output voltage;
and if the coupling capacitance value is greater than the preset output voltage, outputting a first control signal to the staggered wave-transmitting unit.
In this embodiment, the staggered wave-generating unit is controlled to switch the first switch unit and the second switch unit when the output voltage is judged to be greater than the preset output voltage, so as to provide a load for the output bus, and realize no-load voltage stabilization of the isolation power supply.
In a possible embodiment, after comparing the coupling capacitance value with the preset output voltage, the method further includes:
and if the coupling capacitance value is less than or equal to the preset output voltage, outputting a second control signal to the staggered wave-transmitting unit.
In one possible embodiment, the method further comprises:
and after the isolated power supply is detected to be shut down or powered off, outputting a second control signal to the staggered wave sending unit, wherein the second control signal is used for controlling the staggered wave sending unit to output a second high level and a second low level, a port for outputting the second high level is the same as a port for outputting the first low level, and a port for outputting the second low level is the same as a port for outputting the first high level.
It can be understood that, since the method embodiment and the apparatus embodiment are different presentation forms of the same technical concept, the content of the method embodiment portion in the present application should be synchronously adapted to the apparatus embodiment portion, and is not described herein again.
The present application also provides an electronic device 40, as shown in fig. 4, which includes at least one processor (processor) 41; a display screen 42; and a memory (memory) 43, and may further include a communication Interface (Communications Interface) 45 and a bus 44. The processor 41, the display 42, the memory 43 and the communication interface 45 can communicate with each other through the bus 44. The display screen 42 is configured to display a user guidance interface preset in the initial setting mode. The communication interface 45 may transmit information. The processor 41 may call logic instructions in the memory 43 to perform the method in the above embodiment.
Optionally, the electronic device 40 may be the switching module, the isolated power supply, or the like, or may be an electronic device or other devices, which is not limited herein. The processor 41 may be a main control unit in the above switching module, or may be another processor, which is not limited herein.
Furthermore, the logic instructions in the memory 43 may be implemented in the form of software functional units and stored in a computer readable storage medium when sold or used as a stand-alone product.
The memory 43 is a computer-readable storage medium and can be configured to store software programs, computer-executable programs, such as program instructions or modules corresponding to the methods in the embodiments of the present disclosure. The processor 41 executes the functional application and data processing, i.e. implements the method in the above-described embodiments, by executing the software program, instructions or modules stored in the memory 43.
The memory 43 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the electronic device 40, and the like. Further, the memory 43 may include a high-speed random access memory, and may also include a nonvolatile memory. For example, a variety of media that can store program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk, may also be transient storage media.
The above embodiments may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, the above-described embodiments may be implemented in whole or in part in the form of a computer program product. The computer program product comprises one or more computer instructions or computer programs. The procedures or functions according to the embodiments of the present application are wholly or partially generated when the computer instructions or the computer program are loaded or executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire or wirelessly. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains one or more collections of available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium. The semiconductor medium may be a solid state disk.
Embodiments of the present application also provide a computer storage medium, where the computer storage medium stores a computer program for electronic data exchange, the computer program enabling a computer to execute part or all of the steps of any one of the methods described in the above method embodiments, and the computer includes an electronic device.
Embodiments of the present application also provide a computer program product comprising a non-transitory computer readable storage medium storing a computer program operable to cause a computer to perform some or all of the steps of any of the methods as described in the above method embodiments. The computer program product may be a software installation package, the computer comprising an electronic device.
It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.
In the several embodiments provided in the present application, it should be understood that the disclosed method, apparatus and system may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative; for example, the division of the unit is only a logic function division, and there may be another division manner in actual implementation; for example, various elements or components may be combined or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be physically included alone, or two or more units may be integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute some steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: u disk, removable hard disk, magnetic disk, optical disk, volatile memory or non-volatile memory. The non-volatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of example, but not limitation, many forms of Random Access Memory (RAM) are available, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), Enhanced SDRAM (ESDRAM), synchlink DRAM (SLDRAM), and direct bus RAM (DR RAM). And the like, which may store program code.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications can be easily made by those skilled in the art without departing from the spirit and scope of the present invention, and it is within the scope of the present invention to include different functions, combination of implementation steps, software and hardware implementations.
Claims (13)
1. A switching module is applied to an isolated power supply, wherein the isolated power supply comprises a direct current bus, an output bus, a fan power supply module and a switching module, and the switching module is configured with a first input port, a second input port and a first output port; the first input port is connected with the direct current bus and used for accessing a first voltage output by the direct current bus; the second input port is connected with the output bus and used for accessing a second voltage output by the output bus; the first output port is connected with the fan power supply module and used for transmitting the first voltage or the second voltage to the fan power supply module; the switching module includes:
the main control unit is used for detecting the output voltage of the output bus and outputting a first control signal when the output voltage is judged to be greater than a preset output voltage;
the staggered wave sending unit is used for receiving a first control signal of the main control unit and outputting a first low level and a first high level according to the first control signal;
the first switch unit is connected with the first output port and the first input port, and is used for receiving the first low level and disconnecting a loop of the fan power supply module and the direct-current bus according to the first low level;
and the second switch unit is connected with the first output port and the second input port, and is used for receiving the first high level and conducting a loop of the fan power supply module and the output bus according to the first high level.
2. The switching module of claim 1, wherein the master unit is further configured to:
obtaining junction capacitance of a switch tube in the isolation power supply;
calculating interlayer capacitances of a primary side and a secondary side of an isolation transformer of a DCDC isolation circuit in the isolation power supply;
calculating the parasitic capacitance of the secondary side of an isolation transformer of a DCDC isolation circuit in the isolation power supply;
predicting a coupling capacitance value according to the junction capacitance, the interlayer capacitance and the parasitic capacitance;
comparing the coupling capacitance value with the preset output voltage;
and if the coupling capacitance value is greater than the preset output voltage, outputting a first control signal.
3. The switching module according to claim 2, wherein after comparing the coupling capacitance value with the preset output voltage, the main control unit is further configured to:
and if the coupling capacitance value is less than or equal to the preset output voltage, outputting a second control signal.
4. The switching module of claim 1, wherein the master unit is further configured to:
and outputting a second control signal to the staggered wave-transmitting unit after the isolated power supply is detected to be turned off or powered off.
5. The switching module according to claim 3 or 4, wherein the interleaving hairwave unit is further configured to:
and receiving a second control signal of the main control unit, and outputting a second high level and a second low level according to the second control signal, wherein a port outputting the second high level is the same as a port outputting the first low level, and a port outputting the second low level is the same as a port outputting the first high level.
6. An isolated power supply, comprising:
the rectifying circuit is used for accessing alternating current and rectifying alternating voltage into direct voltage;
the power factor correction circuit is connected with the rectifying circuit and is used for carrying out power factor correction on the direct-current voltage;
the direct current bus is connected with the power factor circuit and used for limiting the size of direct current voltage subjected to power factor correction;
the DCDC isolation circuit is connected with the direct current bus and used for regulating the direct current voltage output by the direct current bus to obtain output voltage;
the output bus is connected with the DCDC isolation circuit and used for outputting the output voltage;
the fan power supply module is used for supplying power to the fan under the power supply of the direct current bus or the output bus;
the switching module of any one of claims 1-5, configured with a first input port, a second input port, and a first output port; the first input port is connected with the direct current bus and used for accessing a first voltage output by the direct current bus; the second input port is connected with the output bus and used for accessing a second voltage output by the output bus; the first output port is connected with the fan power supply module and used for transmitting the first voltage or the second voltage to the fan power supply module.
7. A voltage stabilization control method is characterized in that the method is applied to a main control unit in a switching module of an isolation power supply, wherein the isolation power supply comprises a direct current bus, an output bus, a fan power supply module and a switching module, and the switching module is configured with a first input port, a second input port and a first output port; the first input port is connected with the direct current bus and used for accessing a first voltage output by the direct current bus; the second input port is connected with the output bus and used for accessing a second voltage output by the output bus; the first output port is connected with the fan power supply module and used for transmitting the first voltage or the second voltage to the fan power supply module; the switching module comprises a main control unit, a staggered wave transmitting unit, a first switch unit and a second switch unit, wherein the main control unit is connected with the staggered wave transmitting unit, the staggered wave transmitting unit is respectively connected with the first switch unit and the second switch unit, the first switch unit is connected with the first output port and the first input port, and the second switch unit is connected with the first output port and the second input port; the method comprises the following steps:
detecting an output voltage of the output bus;
and outputting a first control signal when the output voltage is judged to be greater than the preset output voltage, wherein the first control signal is used for controlling the interleaved wave-sending unit to output a first low level and a first high level, the first low level is used for controlling the first switch unit to disconnect a loop of the fan power supply module and the direct-current bus, and the first high level is used for connecting the loop of the fan power supply module and the output bus.
8. The method of claim 7, wherein after detecting the output voltage of the output bus, the method further comprises:
obtaining junction capacitance of a switch tube in the isolation power supply;
calculating interlayer capacitances of a primary side and a secondary side of an isolation transformer of a DCDC isolation circuit in the isolation power supply;
calculating the parasitic capacitance of the secondary side of an isolation transformer of a DCDC isolation circuit in the isolation power supply;
predicting a coupling capacitance value according to the junction capacitance, the interlayer capacitance and the parasitic capacitance;
comparing the coupling capacitance value with the preset output voltage;
and if the coupling capacitance value is greater than the preset output voltage, outputting a first control signal to the staggered wave-transmitting unit.
9. The method of claim 8, wherein after comparing the coupling capacitance value to the preset output voltage, the method further comprises:
and if the coupling capacitance value is less than or equal to the preset output voltage, outputting a second control signal to the staggered wave-transmitting unit.
10. The method of claim 7, further comprising:
and after the isolated power supply is detected to be shut down or powered off, outputting a second control signal to the staggered wave sending unit, wherein the second control signal is used for controlling the staggered wave sending unit to output a second high level and a second low level, a port for outputting the second high level is the same as a port for outputting the first low level, and a port for outputting the second low level is the same as a port for outputting the first high level.
11. An electronic device comprising a processor, a memory, a communication interface, and one or more programs stored in the memory and configured to be executed by the processor, the programs comprising instructions of the steps of the method of any of claims 7-10.
12. A computer-readable storage medium, characterized by storing a computer program for electronic data exchange, wherein the computer program is instructions for causing a computer to perform the steps of the method according to any of claims 7-10.
13. A computer program product, comprising a non-transitory computer readable storage medium storing a computer program operable to cause a computer to perform the steps of the method of any of claims 7-10.
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| CN202210013828.5A CN114024446B (en) | 2022-01-07 | 2022-01-07 | Switching module, voltage stabilization control method and related device |
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| CN202210013828.5A CN114024446B (en) | 2022-01-07 | 2022-01-07 | Switching module, voltage stabilization control method and related device |
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| JP2002354786A (en) * | 2001-05-23 | 2002-12-06 | Nagano Japan Radio Co | Current mode dc/dc converter |
| TWI415556B (en) * | 2006-08-02 | 2013-11-11 | Zippy Tech Corp | Cooling fan speed control circuit |
| CN204538972U (en) * | 2015-02-05 | 2015-08-05 | 深圳奥特迅电力设备股份有限公司 | A kind of Switching Power Supply of wide range output |
| CN107018594B (en) * | 2017-04-07 | 2020-02-14 | 深圳迈睿智能科技有限公司 | LED load protection method |
| CN112015222B (en) * | 2020-08-28 | 2021-11-02 | 重庆凯米尔汽油机有限公司 | Power supply no-load voltage adjusting device |
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