CN110609584B - Voltage regulation method - Google Patents
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- CN110609584B CN110609584B CN201910849733.5A CN201910849733A CN110609584B CN 110609584 B CN110609584 B CN 110609584B CN 201910849733 A CN201910849733 A CN 201910849733A CN 110609584 B CN110609584 B CN 110609584B
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- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
- G05F1/561—Voltage to current converters
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Abstract
The invention discloses a voltage regulation method, which is realized based on a voltage stabilization module, wherein the outside of the voltage stabilization module is provided with an input end and an output end; the voltage stabilizing module comprises a switch triode, a freewheeling diode, an energy storage inductor, a capacitor and a processor; the collector of the switching triode is connected with the input end; two poles of the energy storage inductor are respectively connected with the emitting electrode and the output end of the switching triode; the anode of the fly-wheel diode is grounded, and the cathode of the fly-wheel diode is connected between the switching triode and the energy storage inductor; one end of the capacitor is grounded, and the other end of the capacitor is connected between the energy storage inductor and the output end; the processor is provided with a plurality of universal input and output interfaces, and the voltage stabilizing module is provided with an input current monitoring point, an input voltage monitoring point and an output voltage monitoring point. The voltage regulation method dynamically regulates the opening time of the switching triode in one period according to the input voltage value and the output voltage value, ensures that the output voltage value fluctuates in a small fluctuation range, and has a good voltage regulation effect.
Description
Technical Field
The invention relates to the field of voltage regulation, in particular to a voltage regulation method.
Background
The electric louver executing mechanism is a motor, and the louver is turned over by driving the motor, so that the aims of shading sun and ventilating are fulfilled. The common electric shutter power supply system is a 220V commercial power input, and converts the voltage into 24V or 12V through a DC/DC conversion technology. The common power supply voltage of the direct current motor is 24V or 12V, and positive and negative rotation of the motor is realized by changing the positive and negative ends of the power supply of the direct current motor.
In a conventional DC/DC conversion circuit, a target voltage is generally obtained by a voltage stabilizing chip. The common voltage stabilizing chips are 2 types, one type is a linear voltage stabilizing chip, such as LM7812, the highest input voltage can reach 35V, and the output current can reach more than 1A; the second type is a switching voltage-stabilized power supply chip, the common types are more, such as LM2678-ADJ of TI company, the highest input voltage can reach 40V, and the output current can reach 5A; the two modes have simple circuit structures, and voltage conversion can be realized only by peripherally configuring simple resistance-capacitance devices.
However, the linear voltage stabilization chip has fatal weaknesses, namely low conversion efficiency and serious heat generation, and is particularly applied to the working conditions of higher input voltage and larger fluctuation.
The switch voltage stabilizing chip can achieve high conversion efficiency, and can still provide smooth output voltage even under the working conditions of high input voltage and large fluctuation; the chip regulates the duty ratio of the switch through detecting the output voltage and performing voltage closed loop feedback, and the error amplifier, so as to stabilize the output voltage. When the motor drives the shutter to rotate, the current is large at the moment of starting, so that the fluctuation of output voltage is large, the simple voltage closed-loop feedback adjustment time is generally hundreds of milliseconds, the rapid response is difficult to be made in the millisecond level, and if the output voltage is unstable, the phenomenon of hiccup of a circuit can be caused, so that the motor operates abnormally; the switch voltage stabilizing chip with quick response is very expensive in cost, long in purchasing period and not beneficial to batch production of products.
In addition, a relatively proper transmission parameter is difficult to find by simply utilizing voltage feedback for adjustment, and the transmission parameter belongs to rough adjustment, is not fine and smooth, has large error output and causes larger output voltage fluctuation. The output precision of a conventional power supply chip is about 5%, and if the output precision reaches 2%, the cost is expensive.
Disclosure of Invention
In order to overcome the defects of the existing conversion circuit, the invention provides a voltage regulating method, which dynamically regulates the opening time of a switching triode in one period according to an input voltage value and an output voltage value, ensures that the output voltage value fluctuates in a smaller fluctuation range, reduces ripples, improves the voltage output stability and has good voltage stabilizing effect.
Correspondingly, the invention provides a voltage regulation method, which is realized based on a voltage stabilization module, wherein the voltage stabilization module is externally provided with an input end and an output end; the voltage stabilizing module comprises a switch triode, a freewheeling diode, an energy storage inductor, a capacitor and a processor;
the collector of the switching triode is connected with the input end;
two poles of the energy storage inductor are respectively connected with the emitting electrode of the switching triode and the output end;
the anode of the freewheeling diode is grounded, and the cathode of the freewheeling diode is connected between the switching triode and the energy storage inductor;
one end of the capacitor is grounded, and the other end of the capacitor is connected between the energy storage inductor and the output end;
the processor is provided with a plurality of universal input and output interfaces, and the voltage stabilizing module is provided with an input current monitoring point, an input voltage monitoring point and an output voltage monitoring point;
the input current monitoring point is arranged between the input end and the switching triode, and the input current monitoring point is connected with one universal input/output interface of the universal input/output interfaces;
the input voltage monitoring point is arranged on the input end and is connected with one of the universal input/output interfaces;
the output voltage monitoring point is arranged on the output end and is connected with one of the universal input/output interfaces;
and the base electrode of the switching triode is connected with one universal input/output interface of the universal input/output interfaces.
The voltage regulation method comprises the following steps:
presetting target output voltage Uout_refAnd the on time T of the switching triodeonTurn-off time T of switching triodeoffAnd a switching period T of the switching transistor, wherein Ton+Toff＝T；
Real-time output voltage U for receiving output voltage monitoring pointoutAnd real-time input voltage U of input voltage monitoring pointinAnd a correlation coefficient x is found, wherein,
calculating and correcting the on-time T of the switch triodeon1And correcting the switching transistor off time Toff1Wherein, the
Toff1＝T-Ton1；
In a unit period, based on the correction of the on-time T of the switching transistoron1And correcting the switching transistor off time Toff1And sending a control signal to the switching triode.
In an alternative embodiment, theIn a unit period, based on the correction of the on-time T of the transistoron1And correcting the switching transistor off time Toff1Sending a control signal to a switching transistor includes:
based on the corrected switching transistor on-time T within a switching period T of the switching transistoron1Sending an opening signal to the switching transistor, wherein the opening signal enables the switching transistor to keep an opening state;
when the switching triode is in an open state, input voltage is input from the input end, and meanwhile, the energy storage inductor is magnetized, the capacitor is charged, and voltage output is carried out on the output end;
based on the corrected switching transistor off-time T within a switching period T of the switching transistoroff1Sending a turn-off signal to the switching transistor, wherein the turn-off signal enables the switching transistor to keep a turn-off state;
and when the switching triode is in a closed state, the input end and the output end are cut off, the capacitor discharges and voltage is output to the output end through the freewheeling diode and the energy storage inductor.
In an alternative embodiment, the voltage regulation method comprises the steps of:
receiving real-time input current I of input current monitoring pointinJudging the real-time input current IinWhether the current value is larger than a preset current value or not;
when the real-time input current IinAnd when the current value is larger than the preset current value, the switching triode is turned off.
In an optional embodiment, the voltage regulation method further comprises the steps of:
real-time output voltage U for receiving output voltage monitoring pointoutAnd judging the UoutWhether the difference is larger than a preset bang-bang threshold value;
when U is turnedoutAnd when the voltage is larger than a preset bang-bang threshold value, the switching triode is turned off.
In an optional embodiment, the voltage regulator module further comprises an input diode;
the anode of the input diode is connected with the input end, and the cathode of the input diode is connected with the collector of the switching triode;
the input current monitoring point and the input voltage monitoring point are arranged between the input diode and the switch triode.
The invention provides a voltage regulation method, which is realized based on a voltage stabilization module, wherein the voltage stabilization module has the functions of voltage reduction and voltage stabilization, and the function of quickly regulating a circuit is realized by utilizing a processor to monitor circuit information and the duty ratio of a switching triode, so that the voltage of an output end is kept stable, and the voltage regulation method has good practicability; the invention also provides a voltage stabilizing system, which utilizes the voltage stabilizing module to process the unstable input voltage of the power supply module and outputs the stable voltage at the output end, and simultaneously utilizes the quick adjustment characteristic of the voltage stabilizing module aiming at the voltage fluctuation caused by the instantaneous power change of the output element, thereby ensuring the stability of the output voltage and having good practicability; the voltage regulation method regulates output voltage through the duty ratio of a switching triode, performs formula operation by utilizing the characteristic that circuit current cannot be suddenly changed, and has stable output characteristic; meanwhile, the current threshold limit and the bang-bang threshold limit are set, and the method has good practicability for solving abnormal fluctuation of the circuit.
Drawings
In order to more clearly illustrate the embodiments of the present invention 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 invention, 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 a voltage stabilization module according to an embodiment of the invention;
FIG. 2 is a schematic diagram of a voltage stabilization system according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of an embodiment of a voltage stabilization system according to an embodiment of the present invention;
FIG. 4 shows a flow chart of a voltage regulation method of an embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, 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 invention.
Fig. 1 is a schematic structural diagram of a voltage regulator module according to an embodiment of the present invention, in which the voltage regulator module includes an input terminal and an output terminal; the voltage stabilizing module comprises a switch triode 1, a freewheeling diode 2, an energy storage inductor 3, a capacitor 5 and a processor 6;
the collector of the switching triode 1 is connected with the input end;
two poles of the energy storage inductor 3 are respectively connected with the emitting electrode of the switching triode 1 and the output end;
the anode of the freewheeling diode 2 is grounded, and the cathode of the freewheeling diode 2 is connected between the switching triode 1 and the energy storage inductor 3;
one end of the capacitor 5 is grounded, and the other end of the capacitor 5 is connected between the energy storage inductor 3 and the output end;
the processor 6 is provided with a plurality of general input/output interfaces I/O, and the voltage stabilizing module is provided with an input current monitoring point, an input voltage monitoring point and an output voltage monitoring point;
the input current monitoring point is arranged between the input end and the switching triode 1, and the input current monitoring point is connected with one universal input/output interface of the universal input/output interfaces;
the input voltage monitoring point is arranged on the input end and is connected with one of the universal input/output interfaces;
the output voltage monitoring point is arranged on the output end and is connected with one of the universal input/output interfaces;
and the base electrode of the switching triode 1 is connected with one universal input/output interface of the universal input/output interfaces.
Optionally, the voltage stabilizing module further includes an input diode 4;
the anode of the input diode 4 is connected with the input end, and the cathode of the input diode 4 is connected with the collector of the switching triode 1;
the input current monitoring point and the input voltage monitoring point are arranged between the input diode 4 and the switch triode 1.
Specifically, the voltage stabilizing module is mainly used for stabilizing the voltage and outputting the voltage after the voltage of the fluctuating direct current voltage is reduced, and the voltage output stability of the output end is ensured. Specifically, the input end is used for connecting an external power supply module and inputting voltage, and optionally, the power supply module can be a power supply module of a storage battery, a commercial power and a photovoltaic module; the input end is isolated from the voltage stabilizing module and the power supply module through an input diode 4; the on and off of the switching triode are controlled by the processor, when the switching triode 1 is switched on, input voltage is input from the input end, and after passing through the switching triode 1, the energy storage inductor 3 is simultaneously magnetized, the capacitor 5 is charged, and voltage output is carried out on the output end; when the switching triode 1 is in a closed state, a path between the input end and the output end is cut off, the capacitor 5 starts to discharge due to the interruption of external voltage, and voltage is output to the output end through the unidirectional conduction function of the freewheeling diode 2 and the current mutation prevention function of the energy storage inductor 3.
The average value of the output end voltage depends on the proportion of the conduction time of the switching triode in a unit period to the period time, namely the duty ratio, the processor module acquires the output end voltage through the connection of the general input/output interface and an output voltage monitoring point, acquires the input end current through the connection of the general input/output interface and an input current monitoring point, and acquires the input voltage through the connection of the general input/output interface and an input voltage monitoring point; and then the processor calculates the duty ratio required by the switching triode through real-time calculation, and adjusts the conduction time of the switching triode in unit cycle time through the universal input and output interface, thereby realizing the adjustment of the output end voltage.
Specifically, the internal operation process of the regulator module processor according to the embodiment of the present invention is described later with reference to the voltage regulation method provided by the embodiment of the present invention.
It should be noted that, common processor chips such as STM32 and the like each have a plurality of general input/output interfaces, and one of the processor chips may be selected in specific implementation; in order to ensure the corresponding speed, optionally, the frequency sum of the processor chip is adjusted to a higher value so as to improve the operation speed of the processor; the crystal oscillator frequency of the processor chip can be selected to be a large value so as to improve the sampling density of the processor to each monitoring point and improve the control speed of the processor to the triode switch.
Fig. 2 shows a schematic structural diagram of a voltage stabilizing system according to an embodiment of the present invention, and fig. 3 shows a schematic structural diagram of a voltage stabilizing system according to an embodiment of the present invention. The invention provides a voltage stabilizing system, which comprises a power supply module, an output element and the voltage stabilizing module;
the output end of the power supply module is connected with the input end of the voltage stabilizing module;
the input end of the output element is connected with the output end of the voltage stabilizing module;
the minimum value of the voltage at the output end of the power supply module is larger than the rated input voltage of the output element.
The output voltage of the output end of the power supply module is not a constant value and can fluctuate, so that the input voltage is regulated by the voltage stabilizing module of the embodiment of the invention to ensure the stability of the output voltage; in addition, since no isolation structure is arranged between the output end of the voltage stabilizing module and the output element, when the output element has severe power fluctuation, the voltage at the output end of the voltage stabilizing module also generates corresponding fluctuation, so that when the output voltage changes, the duty ratio of the switching triode also needs to be adjusted by the voltage stabilizing module of the embodiment of the invention to obtain more stable voltage output in order to ensure the stability of the output voltage and the use safety of the output element; in addition, when the loop current is too large, in order to prevent the output element from overheating, the output voltage can be properly reduced to reduce the loop circuit and reduce the current thermal effect of the output element.
As can be seen from the above description, the voltage stabilizing module has two functions, wherein on one hand, when the input voltage is unstable, the output voltage is kept stable by adjusting the duty ratio of the switching transistor, and on the other hand, when the output element load fluctuates and the output voltage fluctuates, the output voltage is kept stable by adjusting the duty ratio of the switching transistor.
In specific application, optionally, the power supply module includes a maximum power point tracking photovoltaic module, and an output end of the maximum power point tracking photovoltaic module is connected with an input end of the power supply module.
Optionally, the power supply module includes a storage battery, and an output end of the storage battery is connected to an input end of the power supply module.
Optionally, the output element is a motor.
The maximum power point tracking photovoltaic module is a photovoltaic module with a power output optimization function, the duty ratio of a switching tube G1 and a switching tube G2 is reasonably adjusted by the maximum power point tracking photovoltaic module through an MCU (microprogrammed control Unit), so that the power output by an output end is at the maximum value.
Meanwhile, the output end of the maximum power point tracking photovoltaic assembly and the output end of the storage battery are simultaneously connected to the input end of the voltage stabilizing module and used for supplying power to the voltage stabilizing module; due to the power tracking characteristic of the maximum power point tracking photovoltaic module, the fluctuation of the input voltage of the voltage stabilizing module is large, and the output voltage stability is greatly increased after the regulation is carried out by the voltage stabilizing module of the embodiment of the invention; in addition, the output element of the embodiment of the invention is the motor, the motor has a slow rotating speed and a large torque when being started, and the current flowing through the motor coil is large, so that the output voltage of the voltage stabilizing module can be properly reduced for optimizing the heat dissipation of the motor, and the output voltage is recovered when the loop current of the voltage stabilizing module reaches a normal value.
FIG. 4 shows a flow chart of a voltage regulation method of an embodiment of the invention. Correspondingly, the embodiment of the invention also provides a voltage regulation method, which comprises the following steps:
s101: presetting target output voltage Uout_refAnd the on time T of the switching triodeonTurn-off time T of switching triodeoffAnd a switching period T of the switching transistor, wherein Ton+Toff＝T；
Since the actual voltages required by the output elements at different stages are different, the target output voltage U is presetout_refThe rated working voltage of the output element needs to be set; similarly, to determine the on-time T of the switching transistoronAnd the turn-off time T of the switching triodeoffThe initial value of the input voltage of the input end of the power supply module needs to be set, and the initial value of the input voltage and the target output voltage U are obtained according to the initial value of the input voltageout_refThe relation between them determines the on-time T of the triodeonAnd the turn-off time T of the switching triodeoffIs started.
Specifically, the initial value of the input voltage of the power supply module is set as U1Then, then
Accordingly, Toff＝T-Ton。
S102: real-time output voltage U for receiving output voltage monitoring pointoutAnd real-time input voltage U of input voltage monitoring pointinAnd a correlation coefficient x is found, wherein,
when the voltage stabilizer starts to work, the output voltage monitoring point and the input voltage monitoring point both have corresponding voltage signals, specifically, the voltage signals received by the processor are respectively real-time output voltage UoutAnd real-time input voltage Uin. Real-time output voltage UoutAnd real-time input voltage UinThe relationship between is
Wherein, the correlation coefficient x is a variable and needs to pass through a formula
Make a confirmation, i.e.
In a specific implementation, it is considered that the correlation coefficient x is not transformed in a short time.
S103: calculating and correcting the on-time T of the switch triodeon1And correcting the switching transistor off time Toff1Wherein, the
Toff1＝T-Ton1；
The real-time proportional relationship between the output voltage and the input voltage can be obtained in step S102, and the target output voltage U is used as the basis of the proportional relationshipout_refReplacing the real-time output voltage U in the original formulaoutThe input voltage and the correlation coefficient are regarded as constant values in a short time, and correspondingly, the on-time T of the switching triode is adjusted and correctedon1And correcting the switching transistor off time Toff1The adjustment of the real-time output voltage can be realized.
S104: in a unit period, based on the correction of the on-time T of the switching transistoron1And correcting the switching transistor off time Toff1Sending a control signal to a switching triode;
in particular, within a switching period T of the switching transistorBased on said corrected switching transistor on-time Ton1Sending an opening signal to the switching transistor, wherein the opening signal enables the switching transistor to keep an opening state;
when the switching triode is in an open state, input voltage is input from the input end, and meanwhile, the energy storage inductor is magnetized, the capacitor is charged, and voltage output is carried out on the output end;
based on the corrected switching transistor off-time T within a switching period T of the switching transistoroff1Sending a turn-off signal to the switching transistor, wherein the turn-off signal enables the switching transistor to keep a turn-off state;
and when the switching triode is in a closed state, the input end and the output end are cut off, the capacitor discharges and voltage is output to the output end through the freewheeling diode and the energy storage inductor.
Optionally, the voltage regulation method includes the following steps:
receiving real-time input current I of input current monitoring pointin；
Based on said real-time input current IinTo the correction of the switching transistor on-time Ton1And correcting the switching transistor off time Toff1And (6) timing.
In specific implementation, because the on-off of the switching triode has certain delay, if the timing is started only by sending an on-off signal by the processor, the duty ratio of the switching triode is not consistent with a theoretical value, and therefore, optionally, the real-time input current I is utilizedinThe on-off condition of the access is judged according to the change condition of the switch, so that the actual on-off condition of the switch triode is judged, and more accurate duty ratio parameters are obtained.
Optionally, the voltage regulation method further includes the following steps:
s105: receiving real-time input current I of input current monitoring pointinJudging the real-time input current IinWhether the current value is larger than a preset current value or not;
s106: when the real-time input current IinIs greater thanWhen the current value is preset, the switching triode is turned off;
when the output element is an output element with large current variation such as a motor and the like, the coil has a large current value due to slow rotating speed and high torque in the starting stage of the motor; to prevent overheating of the output element, the current I is input in real timeinWhen the current value is larger than the preset current value, the output voltage of the voltage stabilizing module is reduced by turning off the switching triode until the current I is input in real timeinAnd the switching triode is turned on again after the voltage is restored to a reasonable range.
Optionally, the voltage regulation method further includes the following steps:
s107: real-time output voltage U for receiving output voltage monitoring pointoutAnd judging the UoutWhether the difference is larger than a preset bang-bang threshold value;
s108: when U is turnedoutAnd when the voltage is larger than a preset bang-bang threshold value, the switching triode is turned off.
Specifically, in the control module, limited by the hardware model, the situation that the PI parameter is not appropriate may exist under the limit condition, which causes the voltage overshoot to be large and the fluctuation range of the output voltage to be increased; in the voltage regulation method of the embodiment of the invention, a bang-bang control mechanism is introduced, if U is detectedoutAnd if the output voltage exceeds the bang-bang threshold value, the processor turns off the switch tube signal, and the output voltage naturally drops to ensure the normal operation of the output element.
In summary, the embodiment of the present invention provides a voltage stabilizing module, which has voltage reducing and stabilizing functions, and realizes a function of rapidly adjusting a circuit by monitoring circuit information through a processor and by switching a duty ratio of a triode, so that an output voltage is kept stable, and the voltage stabilizing module has good practicability; the embodiment of the invention also provides a voltage stabilizing system, which utilizes the voltage stabilizing module to process the unstable input voltage of the power supply module and output the stable voltage at the output end, and simultaneously utilizes the quick adjustment characteristic of the voltage stabilizing module aiming at the voltage fluctuation caused by the instantaneous power change of an output element, thereby ensuring the stability of the output voltage and having good practicability; the embodiment of the invention also provides a voltage regulation method, which regulates output voltage through the duty ratio of the switching triode, performs formula operation by utilizing the characteristic that circuit current cannot be suddenly changed, and has stable output characteristic; meanwhile, the current threshold limit and the bang-bang threshold limit are set, and the method has good practicability for solving abnormal fluctuation of the circuit.
The voltage stabilizing module, the voltage stabilizing system and the voltage regulating method provided by the embodiment of the invention are described in detail, a specific embodiment is applied in the description to explain the principle and the implementation mode of the invention, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (5)
1. The voltage regulation method is characterized by being realized based on a voltage stabilization module, wherein the voltage stabilization module is externally provided with an input end and an output end; the voltage stabilizing module comprises a switch triode, a freewheeling diode, an energy storage inductor, a capacitor and a processor;
the collector of the switching triode is connected with the input end;
two poles of the energy storage inductor are respectively connected with the emitting electrode of the switching triode and the output end;
the anode of the freewheeling diode is grounded, and the cathode of the freewheeling diode is connected between the switching triode and the energy storage inductor;
one end of the capacitor is grounded, and the other end of the capacitor is connected between the energy storage inductor and the output end;
the processor is provided with a plurality of universal input and output interfaces, and the voltage stabilizing module is provided with an input current monitoring point, an input voltage monitoring point and an output voltage monitoring point;
the input current monitoring point is arranged between the input end and the switching triode, and the input current monitoring point is connected with one universal input/output interface of the universal input/output interfaces;
the input voltage monitoring point is arranged on the input end and is connected with one of the universal input/output interfaces;
the output voltage monitoring point is arranged on the output end and is connected with one of the universal input/output interfaces;
the base electrode of the switching triode is connected with one universal input/output interface of the universal input/output interfaces;
the voltage regulation method comprises the following steps:
presetting target output voltage Uout_refAnd the on time T of the switching triodeonTurn-off time T of switching triodeoffAnd a switching period T of the switching transistor, wherein Ton+Toff＝T；
Real-time output voltage U for receiving output voltage monitoring pointoutAnd real-time input voltage U of input voltage monitoring pointinAnd a correlation coefficient x is found, wherein,
calculating and correcting the on-time T of the switch triodeon1And correcting the switching transistor off time Toff1Wherein, the
Toff1＝T-Ton1；
In a unit period, based on the correction of the on-time T of the switching transistoron1And correcting the switching transistor off time Toff1And sending a control signal to the switching triode.
2. The voltage regulation method of claim 1 wherein the on-time T of the switching transistor is based on the correction during a unit periodon1And correcting the switching transistor switchClosed time Toff1Sending a control signal to a switching transistor includes:
based on the corrected switching transistor on-time T within a switching period T of the switching transistoron1Sending an opening signal to the switching transistor, wherein the opening signal enables the switching transistor to keep an opening state;
when the switching triode is in an open state, input voltage is input from the input end, and meanwhile, the energy storage inductor is magnetized, the capacitor is charged, and voltage output is carried out on the output end;
based on the corrected switching transistor off-time T within a switching period T of the switching transistoroff1Sending a turn-off signal to the switching transistor, wherein the turn-off signal enables the switching transistor to keep a turn-off state;
and when the switching triode is in a closed state, the input end and the output end are cut off, the capacitor discharges and voltage is output to the output end through the freewheeling diode and the energy storage inductor.
3. The voltage regulation method of claim 1, wherein the voltage regulation method comprises the steps of:
receiving real-time input current I of input current monitoring pointinJudging the real-time input current IinWhether the current value is larger than a preset current value or not;
when the real-time input current IinAnd when the current value is larger than the preset current value, the switching triode is turned off.
4. The voltage regulation method of claim 1, further comprising the steps of:
real-time output voltage U for receiving output voltage monitoring pointoutAnd judging the UoutWhether the difference is larger than a preset bang-bang threshold value;
when U is turnedoutAnd when the voltage is larger than a preset bang-bang threshold value, the switching triode is turned off.
5. The voltage regulation method of claim 1, wherein the voltage regulation module further comprises an input diode;
the anode of the input diode is connected with the input end, and the cathode of the input diode is connected with the collector of the switching triode;
the input current monitoring point and the input voltage monitoring point are arranged between the input diode and the switch triode.
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Address after: 510000 No. 24, Chadong Dongxing Road, Dalong street, Panyu District, Guangzhou City, Guangdong Province Patentee after: Guangdong gelulang Energy Saving Technology Co.,Ltd. Address before: 510000 101, 24 Dongxing Road, Chadong village, Dalong street, Panyu District, Guangzhou City, Guangdong Province Patentee before: GUANGZHOU GREENAWN AWNING SCIENCE AND TECHNOLOGY LTD. |