CN111290471A - Novel maximum power tracking microcontroller of thermoelectric power generation system - Google Patents
Novel maximum power tracking microcontroller of thermoelectric power generation system Download PDFInfo
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- CN111290471A CN111290471A CN202010104185.6A CN202010104185A CN111290471A CN 111290471 A CN111290471 A CN 111290471A CN 202010104185 A CN202010104185 A CN 202010104185A CN 111290471 A CN111290471 A CN 111290471A
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- G—PHYSICS
- 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
- G05F1/66—Regulating electric power
- G05F1/67—Regulating electric power to the maximum power available from a generator, e.g. from solar cell
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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
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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
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
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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
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
Abstract
The invention discloses a novel maximum power tracking microcontroller of a thermoelectric power generation system, which comprises a detection module, a single chip microcomputer control module, a display module, a drive circuit, a Boost type Boost DC/DC conversion circuit and a power supply voltage-stabilizing conversion circuit, wherein the detection module is used for detecting the maximum power of a thermoelectric power generation system; the detection module detects the voltage and the current output by the thermoelectric equipment in real time; the singlechip control module performs A/D conversion on the detected voltage and current and transmits the converted voltage and current to the display module for display; the singlechip control module changes the duty ratio of PWM waves output by the singlechip; the Boost type DC/DC conversion circuit adjusts the on-off time of a switching tube of an internal circuit thereof according to the PWM signal to adjust the duty ratio of the switching tube, thereby realizing the tracking control of the maximum power point; and the power supply voltage stabilizing and converting circuit provides the direct-current voltage of the maximum power tracking microcontroller. The MPPT system is designed by using the embedded system, and has the characteristics of portability, low price, high development speed and the like.
Description
Technical Field
The invention belongs to the technical field of thermoelectric power generation, and particularly relates to a maximum power tracking microcontroller of a novel thermoelectric power generation system.
Background
In recent years, certain achievements have been achieved in foreign control technologies of maximum power point tracking Microcontrollers (MPPT), and especially the rapid development of artificial intelligence control technologies adds vitality to the MPPT control technologies. Since the research on the MPPT is in a continuous research and development stage at late start in China and has a certain gap compared with the MPPT at abroad, and the MPPT control still adopts a relatively laggard fixed voltage method in many practical application systems, the research strength in the technical field of the MPPT needs to be increased, the technology of the MPPT of the thermoelectric power generation system in China is improved, and the gap between the MPPT and the advanced technology at abroad is shortened
With the rise and development of embedded systems, more intelligent miniaturized processing devices are emerging, and a maximum power point tracking algorithm (MPPT) system can be implemented in an embedded chip.
Along with the development and maturity of chip technology, the voltage and current detection chip is lower and lower, and the design of using embedded system to carry out MPPT system has portable, the low price, development speed characteristics such as fast.
Disclosure of Invention
The invention aims to solve the technical problem of providing a novel maximum power tracking microcontroller of a thermoelectric power generation system aiming at the defects of the prior art.
In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:
a novel maximum power tracking microcontroller of a thermoelectric power generation system comprises a detection module, a single chip microcomputer control module, a display module, a driving circuit, a Boost type Boost DC/DC conversion circuit and a power supply voltage stabilization conversion circuit;
the detection module is used for detecting the voltage and the current output by the thermoelectric equipment in real time;
the singlechip control module is used for carrying out A/D conversion on the voltage and the current detected by the detection module and transmitting the voltage and the current to the display module for displaying;
the single chip microcomputer control module is also used for changing the duty ratio of the PWM wave output by the single chip microcomputer according to the calculation result of the MPPT algorithm;
the driving circuit is used for amplifying the power of the PWM wave output by the singlechip control module;
the Boost type DC/DC conversion circuit is used for adjusting the on-off time of a switching tube of an internal circuit thereof according to a PWM signal output by the driving circuit so as to adjust the duty ratio of the switching tube, change the magnitude of output direct current voltage and realize the tracking control of a maximum power point;
the power supply voltage stabilizing and converting circuit is used for providing direct current voltage of the maximum power tracking microcontroller.
In order to optimize the technical scheme, the specific measures adopted further comprise:
the detection module comprises a voltage detection circuit and a current detection circuit;
the voltage detection circuit is used for detecting the output voltage of the solar cell array, detecting the input and output voltages of the Boost type DC/DC conversion circuit, detecting the output voltage of the storage battery, amplifying the detection result by the operational amplifier circuit and transmitting the detection result to the single chip microcomputer control module;
the current detection circuit is connected with a sampling resistor in series at a current sampling position, and after the current to be detected is represented in a voltage form, a signal is transmitted to the single chip microcomputer control module through the operational amplifier circuit.
The operational amplifier circuit connected with the voltage detection circuit has a parameter R1＝2k,RfWhen the voltage is 1000k, the operational amplifier chip selects an OPA series amplifier chip OPA 2234;
in the current detection circuit, a sampling resistor is made of constantan wires, and the size of the sampling resistor is 0.1 ohm; the operational amplifier circuit connected behind the current detection circuit adopts an in-phase proportional operation circuit, and R is selected as a parameter1＝2k,RfWhen 100k is reached, the operational amplifier chip selects the OPA-series amplifier chip OPA 2234.
The single chip microcomputer control module uses STC15W4K32S 4.
The single chip microcomputer control module changes the duty ratio of the PWM wave output by the single chip microcomputer according to the calculation result of the MPPT algorithm, and the process is as follows:
initializing a CPU, a timer and peripheral equipment;
reading the output voltage and the output current after A/D conversion from the register;
operating the MPPT subprogram of the corresponding algorithm, outputting the duty ratio corresponding to the Boost type DC/DC conversion circuit by the MPPT subprogram, and controlling PWM to output corresponding pulse waves by the duty ratio value;
and finally, the procedure returns to the reading of the A/D conversion value, and the cycle is continued, so that the output voltage of the thermoelectric piece is changed to reach the working voltage corresponding to the maximum power output.
The display module described above uses the LCD12864 for display.
The power supply voltage-stabilizing conversion circuit adopts an LM317 three-terminal voltage stabilizer.
The driving module adopts a chip IR2103, PWM waves output by the singlechip control module are connected to pins HIN and LIN of the IR2103, and amplified signals are output by an LO port.
The invention has the following beneficial effects:
the MPPT system is designed by using the embedded system, the electric energy generated by the thermoelectric module under different external environments can be transmitted to a load with the least loss, the tracking can be performed quickly and stably, the maximum output power under the current working condition is ensured, the thermoelectric conversion efficiency is effectively improved, the cost of the thermoelectric power generation system is reduced, and the MPPT system has the characteristics of high efficiency, practicability, portability, low price, high development speed and the like.
The MPPT system is designed by using the embedded system, and has the characteristics of portability, low price, high development speed and the like.
Drawings
FIG. 1 is a control framework diagram of the present invention;
FIG. 2 is a circuit schematic of the present invention;
FIG. 3 is a flow chart of the single chip microcomputer control module changing the duty ratio of the PWM wave output by the single chip microcomputer according to the calculation result of the MPPT algorithm;
FIG. 4 is a schematic diagram of a driving circuit;
FIG. 5 is a circuit diagram of a driving circuit simulation;
FIG. 6 is a simulation of a voltage detection circuit for detecting a voltage of 5 mV.
Detailed Description
Embodiments of the present invention are described in further detail below with reference to the accompanying drawings.
As shown in fig. 1 and fig. 2, the maximum power tracking microcontroller of the thermoelectric power generation system of the present invention includes a detection module, a single chip microcomputer control module, a display module, a driving circuit, a Boost type Boost DC/DC conversion circuit, and a power supply voltage stabilization conversion circuit;
the detection module is used for detecting the voltage and the current output by the thermoelectric equipment in real time;
the singlechip control module is used for carrying out A/D conversion on the voltage and the current detected by the detection module and transmitting the voltage and the current to the display module for displaying;
the single chip microcomputer control module is also used for changing the duty ratio of the PWM wave output by the single chip microcomputer according to the calculation result of the MPPT algorithm;
the driving circuit is used for amplifying the power of the PWM wave output by the singlechip control module;
the Boost type Boost DC/DC conversion circuit is used for adjusting the on-off time of a switching tube (an MOS type power tube is adopted in the embodiment, and the MOS type power tube has the characteristics of low power consumption, tube voltage reduction, small charge energy storage effect and the like) of an internal circuit thereof according to a PWM signal output by the driving circuit to adjust the duty ratio, change the size of output direct current voltage, calculate power according to the size, perform maximum power tracking and realize the tracking control of a maximum power point;
STC15W4K32S4 outputs PWM signal to control the on-off of switch tubes V1 and V2, if the voltage of accumulator is larger than the upper limit rated voltage, the V1 tube is cut off to stop charging, only if the voltage of accumulator is smaller than the upper limit rated voltage, the V1 tube is connected to continue charging accumulator. If the voltage of the accumulator terminal is less than the lower limit rated voltage, the V2 tube is cut off to stop discharging, and only if the voltage of the accumulator terminal is more than the lower limit rated voltage, the V2 tube is conducted to continue discharging for the load. By controlling the on-off of the switch tubes V1 and V2, the overcharge and the overdischarge can be effectively prevented, and the actual service life of the storage battery is prolonged.
The power supply voltage stabilizing and converting circuit is used for providing direct current voltage of the maximum power tracking microcontroller.
In an embodiment, the detection module comprises a voltage detection circuit and a current detection circuit;
the voltage detection circuit is used for detecting the output voltage of a solar cell array (a cascade thermoelectric chip array), detecting the input and output voltages of the Boost type Boost DC/DC conversion circuit, detecting the output voltage of the storage battery, amplifying the detection result by the operational amplifier circuit and transmitting the detection result to the single chip microcomputer control module;
the current detection circuit is connected with a sampling resistor in series at a current sampling position, and after the current to be detected is represented in a voltage form, a signal is transmitted to the single chip microcomputer control module through the operational amplifier circuit.
The operational amplifier circuit connected with the voltage detection circuit has the parameter selection of R1＝2k,RfWhen the voltage is 1000k, the operational amplifier chip selects an OPA series amplifier chip OPA 2234;
in the current detection circuit, a sampling resistor is made of constantan wires, and the size of the sampling resistor is 0.1 ohm; the operational amplifier circuit connected behind the current detection circuit adopts an in-phase proportional operation circuit, and R is selected as a parameter1＝2k,RfWhen 100k is reached, the operational amplifier chip selects the OPA-series amplifier chip OPA 2234.
Specifically, the method comprises the following steps:
(1) current sensing
The voltage and current values generated by the thermocouple on the thermoelectric device are very small, and since the interference of external conditions usually generates great interference on the small voltage and current, the detection of the small signals needs to pay attention to accurate sampling. The current detection circuit is designed by accurately taking small signals through sampling equipment, properly amplifying the small signals by using an operational amplifier circuit, converting the small signals into voltage within the range of 0-5V, accurately performing AD conversion on a single chip microcomputer, converting analog quantity into digital signals which can be identified and processed by the single chip microcomputer, and analyzing and processing the digital signals by using an MPPT algorithm.
In the circuit design for current detection of 200mA and 500mA, the current signal is firstly converted into a voltage signal to enable the singlechip to carry out AD conversion. According to ohm's law U-IR, a sampling resistor with a small resistance value is connected in series with a current sampling position, and the current to be detected is represented in a voltage mode. The sampling resistor is usually made of constantan wire to reduce the variation of the sampling resistor resistance caused by the temperature variation. The design adopts a sampling resistor of 0.1 ohm, can realize that the current of 200mA is converted into the voltage of 0.02V, the current of 500mA is converted into the voltage of 0.05V, and then the amplification is carried out by an operational amplifier circuit.
The operational amplifier is adopted for amplifying the small signal, so that the amplification function of a large multiple can be realized. The design is carried out by adopting an in-phase proportional operation circuit. And amplifying the sampled voltages of 0.02V and 0.05V, and converting the voltages into voltage values which can be identified by the singlechip. Parameter selection R1＝2k,RfA theoretical calculation magnification of 50 times, 100k, can achieve 0.02V amplified to 1V and 0.05V amplified to 2.5V. The operational amplifier chip in the circuit selects the OPA series of amplifying chips OPA2234, which is selected because of its small size, high precision, small drift and near zero.
(2) Voltage detection
The voltage detection circuit is required to be capable of accurately detecting voltages of 5mV and 1-2V. 5 mV's voltage detection needs to be enlargied to the voltage range that the singlechip can detect discernment. The amplification factor is 500 times, and 2.5V can be obtained after the 5mV voltage is amplified, so that the single chip microcomputer can be used for identification.
The parameter in the circuit is selected to be R1＝2k,RfThe theoretical calculation magnification is 500 times, the voltage of 5mV can obtain 2.5V after being amplified, the voltage detection circuit is simulated by Multisim, and a simulation circuit diagram is shown in FIG. 6. Because the amplification factor is larger than that of 500 times of the tiny voltage of 5mV, the circuit needs to pay attention to avoid interference, otherwise, the detection error is larger, and the realization of the control function is influenced. When the voltage detection circuit is actually built on the bread board, attention needs to be paid to common ground, because the output voltage is greatly different when the output voltage is actually found to be different from the common ground.
In the embodiment, the single-chip microcomputer control module uses STC15W4K32S4 and uses an ADC detection and resistance voltage division circuit carried by STC15W4K32S4 to acquire voltage, so that the acquisition precision is high, the configuration can be directly performed by using software, and the configuration mode is flexible. The STC15W4K32S4 series single chip microcomputer is a new generation 8051 single chip microcomputer with wide voltage, high speed, high reliability, ultra-low power consumption, ultra-low price and ultra-strong anti-interference, and the instruction code is completely compatible with the traditional 8051, but the speed is 8-12 times faster. The internal high-precision R/C clock can be set in a wide range of 5MHz-30MHz during ISP programming, and an external expensive crystal oscillator and an external reset circuit can be thoroughly omitted. 8-path 10-bit PWM, 8-path high-speed 10-bit A/D conversion (30 ten thousand times/second), a built-in comparator can be used for realizing 8-path D/A, or 2 16-bit timers, or 2 external interrupts (supporting rising edge/falling edge interrupts) without an external crystal oscillator and external reset, and a clock and a low-level reset signal can be externally output. The low-power consumption design is provided with an internal low-power consumption timer special for awakening after power failure.
As shown in fig. 3, in the embodiment, the duty ratio of the PWM wave output by the single chip microcomputer is changed by the single chip microcomputer control module according to the calculation result of the MPPT algorithm, and the process is as follows:
after the single chip microcomputer control module is electrified, the MPPT main program firstly initializes the single chip microcomputer control module, and mainly initializes a CPU, a timer and peripheral equipment;
after the initialization setting is finished, the single chip microcomputer control module starts to work normally, and the output voltage and the output current after A/D conversion are read from the register;
operating the MPPT subprogram of the corresponding algorithm, outputting the duty ratio corresponding to the Boost type DC/DC conversion circuit by the MPPT subprogram, and controlling PWM to output corresponding pulse waves by the duty ratio value;
and finally, the procedure returns to the reading of the A/D conversion value, and the cycle is continued, so that the output voltage of the thermoelectric piece is changed to reach the working voltage corresponding to the maximum power output. In the process of the cycle operation of the main program, if the period of the timer is up, the operation is suspended, and the breakpoint which is operated before is returned after the interruption is finished.
In an embodiment, the display module uses an LCD12864 for display.
In the embodiment, the power supply voltage stabilization and conversion circuit adopts an LM317 three-terminal voltage stabilizer, the output voltage of the power supply voltage stabilization and conversion circuit is 1.25V, and the direct-current voltage suitable for system power supply can be obtained by changing the size of the adjustable resistor RP.
In an embodiment, the driving module adopts a chip IR2103, PWM waves output by the single chip microcomputer control module are connected to pins HIN and LIN of the IR2103, and amplified signals are output by an LO port.
The circuit requires that the PWM wave output by the single chip microcomputer control module can drive the Boost type Boost DC/DC conversion circuit to complete the Boost effect, so that the effect of controlling the output voltage is achieved. But the PWM wave driving capability that singlechip directly output is limited, and the waveform distortion is serious and the parameter becomes no longer accurate when directly accessing in boost circuit. Aiming at the problems, an additional circuit is needed to amplify the power of the PWM wave output by the singlechip. There are many schemes for power amplification of PWM waves, and a voltage follower may be formed by an operational amplifier, an amplifier may be formed by a triode, and a driving circuit formed by a UL2003 chip may be used.
The voltage follower can improve the load capacity of the circuit, has the characteristics of high input impedance and low output impedance, and can complete the function of impedance matching in the circuit, so that the next-stage amplifying circuit works in a better state. The chip IR2103 is selected in the design, and the chip IR2103 is a half-bridge driver and is commonly used for driving MOSFETs and IGBTs. The half-bridge driving circuit formed by the IR2103 has large driving capability and strong load carrying capability, and can meet the requirement of driving the booster circuit.
As shown in fig. 3, the driving circuit formed by the IR2103 is connected to the PWM wave output by the single-chip microcomputer control module at the HIN and LIN pins of the IR2103, and the amplified signal is output by the LO port. According to the logic level diagram of IR2103, when the HIN and LIN inputs high level, the LO port outputs high level; LO outputs low when HIN, LIN inputs low.
The driving circuit is simulated by utilizing Multism, a simulation circuit diagram is shown in fig. 4, and a Boost type DC/DC conversion circuit needs to be accessed to the driving circuit when the performance of the driving circuit is tested.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may be made by those skilled in the art without departing from the principle of the invention.
Claims (8)
1. A novel maximum power tracking microcontroller of a thermoelectric power generation system is characterized by comprising a detection module, a single chip microcomputer control module, a display module, a driving circuit, a Boost type Boost DC/DC conversion circuit and a power supply voltage-stabilizing conversion circuit;
the detection module is used for detecting the voltage and the current output by the thermoelectric equipment in real time;
the singlechip control module is used for carrying out A/D conversion on the voltage and the current detected by the detection module and transmitting the voltage and the current to the display module for displaying;
the single chip microcomputer control module is also used for changing the duty ratio of the PWM wave output by the single chip microcomputer according to the calculation result of the MPPT algorithm;
the driving circuit is used for amplifying the power of the PWM wave output by the singlechip control module;
the Boost type DC/DC conversion circuit is used for adjusting the on-off time of a switching tube of an internal circuit thereof according to a PWM signal output by the driving circuit so as to adjust the duty ratio of the switching tube, change the magnitude of output direct current voltage and realize the tracking control of a maximum power point;
the power supply voltage stabilizing and converting circuit is used for providing direct current voltage of the maximum power tracking microcontroller.
2. The novel thermoelectric power generation system maximum power tracking microcontroller as claimed in claim 1, wherein the detection module comprises a voltage detection circuit and a current detection circuit;
the voltage detection circuit is used for detecting the output voltage of the solar cell array, detecting the input and output voltages of the Boost type DC/DC conversion circuit, detecting the output voltage of the storage battery, amplifying the detection result by the operational amplifier circuit and transmitting the detection result to the single chip microcomputer control module;
the current detection circuit is connected with a sampling resistor in series at a current sampling position, and after the current to be detected is represented in a voltage form, a signal is transmitted to the single chip microcomputer control module through the operational amplifier circuit.
3. The MPPT microcontroller of a novel thermoelectric power generation system as claimed in claim 2, wherein the operational amplifier circuit parameter connected with the voltage detection circuit is selected as R1＝2k,RfWhen the voltage is 1000k, the operational amplifier chip selects an OPA series amplifier chip OPA 2234;
in the current detection circuit, a sampling resistor is made of constantan wires, and the size of the sampling resistor is 0.1 ohm; the operational amplifier circuit connected behind the current detection circuit adopts an in-phase proportional operation circuit, and R is selected as a parameter1＝2k,RfWhen 100k is reached, the operational amplifier chip selects the OPA-series amplifier chip OPA 2234.
4. The novel thermoelectric power generation system maximum power tracking microcontroller as claimed in claim 1, wherein the single chip microcomputer control module uses STC15W4K32S 4.
5. The maximum power tracking microcontroller of the novel thermoelectric power generation system according to claim 1, wherein the single-chip microcomputer control module changes the duty ratio of the PWM wave output by the single-chip microcomputer according to the calculation result of the MPPT algorithm, and the process is as follows:
initializing a CPU, a timer and peripheral equipment;
reading the output voltage and the output current after A/D conversion from the register;
operating the MPPT subprogram of the corresponding algorithm, outputting the duty ratio corresponding to the Boost type DC/DC conversion circuit by the MPPT subprogram, and controlling PWM to output corresponding pulse waves by the duty ratio value;
and finally, the procedure returns to the reading of the A/D conversion value, and the cycle is continued, so that the output voltage of the thermoelectric piece is changed to reach the working voltage corresponding to the maximum power output.
6. The novel thermoelectric power generation system maximum power tracking microcontroller as claimed in claim 1, wherein the display module uses LCD12864 for display.
7. The maximum power tracking microcontroller for a thermoelectric power generation system as claimed in claim 1, wherein the power supply voltage stabilization and transformation circuit is an LM317 three-terminal regulator.
8. The maximum power tracking microcontroller of the novel thermoelectric power generation system as claimed in claim 1, wherein the driving module is a chip IR2103, and PWM waves output by the single chip microcomputer control module are connected to HIN and LIN pins of the IR2103, and amplified signals are output by an LO port.
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| CN112105109A (en) * | 2020-09-22 | 2020-12-18 | 许昌学院 | New forms of energy plant lamp control system |
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| CN202957634U (en) * | 2012-12-10 | 2013-05-29 | 温州大学 | Maximum power point (MPPT) tracing and load protection device for photovoltaic cell |
| CN203478711U (en) * | 2013-07-10 | 2014-03-12 | 邝嘉豪 | Solar powered semiconductor refrigeration control system |
| CN103384079A (en) * | 2013-08-12 | 2013-11-06 | 合肥为民电源有限公司 | Method and circuit for tracking maximum power of small and medium-sized direct-driven wind power generation systems |
| CN204423224U (en) * | 2015-02-02 | 2015-06-24 | 无锡科技职业学院 | A kind of solar energy system control structure based on MPPT |
| CN105116956A (en) * | 2015-06-23 | 2015-12-02 | 华南理工大学 | Maximum power tracing controller applied to photovoltaic power generation system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112105109A (en) * | 2020-09-22 | 2020-12-18 | 许昌学院 | New forms of energy plant lamp control system |
| CN112105109B (en) * | 2020-09-22 | 2023-05-26 | 许昌学院 | New energy plant lamp control system |
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