CN102545667B - Adjustment method of shunt chopper output voltage - Google Patents
Adjustment method of shunt chopper output voltage Download PDFInfo
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- CN102545667B CN102545667B CN201210028131.1A CN201210028131A CN102545667B CN 102545667 B CN102545667 B CN 102545667B CN 201210028131 A CN201210028131 A CN 201210028131A CN 102545667 B CN102545667 B CN 102545667B
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Abstract
The invention discloses an adjustment method of shunt chopper output voltage, which comprises the following steps of: building an output voltage setting device; calculating a new scale factor by utilizing a voltage target value, a current voltage value and a current scale factor of an inverter, and sending the new scale factor to a microprocessor (2); repeatedly calculating the scale factor, and sending the scale factor to the microprocessor (2) until output voltage of the inverter is realized to be within a deviation area allowed by the voltage target value; calculating a new integral coefficient by utilizing stabilized voltage precision, a maximum value allowed by the stabilized voltage precision and a current integral coefficient under the condition of the inverter with rated load, and sending the new integral coefficient to the microprocessor (2); and repeatedly calculating the integral coefficient, and sending the integral coefficient to the microprocessor (2) until the stabilized voltage precision is realized to be within the maximum value allowed by the precision. The method has the capability of quickly setting the output voltage of the inverter, so that the setting speed is improved. An algorithm can be compiled, autocompletion can be realized by utilizing an upper computer, the degree of accuracy is improved, and the labor cost can be effectively reduced.
Description
Technical field
The present invention relates to the control method of a kind of voltage adjusting method, particularly a kind of shunt chopper output voltage.
Background technology
In recent years, digital control technology is widely applied in inverter design.Circulation when reducing many inverter parallels between module, the output voltage of each inverter should be tried one's best unanimously.Because the component parameter of each inverter hardware circuit exists individual difference, cause size and the precision of voltage regulation of initial output voltage of each module variant, even difference is larger.Therefore, conventionally, before module parallel connection, need to adjust through output voltage, realize size and the basically identical object of the precision of voltage regulation of each inverter output voltage.And inverter output voltage has two parameters to determine, i.e. Proportional coefficient K p and integral coefficient Ki.Therefore by regulating Kp and Ki, just can reach the object that regulates inverter output voltage.
The conventional method that inverter output voltage regulates is: according to current voltage value and the desired value of inverter, repeatedly revise Proportional coefficient K p and integral coefficient Ki in software program, compiling programming program, power up checking afterwards.If do not reach desired value, repeatedly revise and verify.Process is loaded down with trivial details, needs repeated multiple times programming, has reduced debugging operating efficiency, has also reduced the useful life of microprocessor in inverter simultaneously.
Summary of the invention
The object of the invention is to provide a kind of control method of shunt chopper output voltage, solves and adjusts by software the problem that inverter output voltage process is loaded down with trivial details.
A kind of concrete steps of control method of shunt chopper output voltage are:
The first step builds output voltage regulator
Output voltage regulator, comprising: resistance R, capacitor C, E
2pROM chip, microprocessor, MAX3232 chip, host computer.One end of capacitor C, E
2the Vcc pin of PROM chip is connected with power supply+3.3V end, the other end of capacitor C, E
2the WP pin ground connection of PROM chip.E
2the SCL pin of PROM chip is connected with the IO1 pin of microprocessor, E
2the SDA pin of PROM chip, the IO2 pin of microprocessor are connected with one end of resistance R, and the other end of resistance R is connected with power supply+3.3V end.The TX pin of microprocessor is connected with the T1IN pin of MAX3232 chip, and the RX pin of microprocessor is connected with the R1OUT pin of MAX3232 chip.The T1OUT pin of MAX3232 chip is connected with the RX1 pin of host computer, and the R1IN pin of MAX3232 chip is connected with the TX1 pin of host computer.
Second step host computer sends target voltage values to microprocessor
Host computer sends voltage-target to microprocessor, is designated as Um1.
The 3rd step host computer reads inverter relevant parameter
Host computer sends reading order to microprocessor, and the current output voltage of inverter, proportionality coefficient are recorded, and is designated as respectively Uo1, Kp1.
Proportionality coefficient desired value is sent to microprocessor by the 4th step host computer
Calculating K p1*Um1/Uo1, is designated as Kp2, sets it as new proportionality coefficient and sends to microprocessor.
The 5th step host computer compares the output voltage of inverter and voltage-target
Host computer reads the current output voltage of inverter, if output voltage within the positive and negative permissible variation scope of voltage-target time, regulates the end-of-job of proportionality coefficient, current proportionality coefficient is designated as Kp_ok; If while not meeting the condition of output voltage within voltage-target Um1 permissible variation scope, repeatedly calculate proportionality coefficient desired value, send to microprocessor, until realize output voltage within voltage-target permissible variation scope till.If through repeatedly regulating, still regulate fall short scope, illustrate that the hardware parameter of inverter does not mate, stop regulating and returning to relevant departments and keep in repair.
The 6th step host computer reads the inverter relevant parameter in nominal load situation
Inverter band nominal load, host computer sends reading order to microprocessor, and the current output voltage of inverter, proportionality coefficient, integral coefficient, the precision of voltage regulation are recorded, and is designated as respectively Uo2, Kp, Ki1, Jw1; The maximum that the precision of voltage regulation is allowed is designated as Jwm.
Integral coefficient desired value is sent to microprocessor by the 7th step host computer
Calculating K i1+ (Jw1-Jwm) * Kp/T, is designated as Ki2, sets it as new integral coefficient and sends to microprocessor, the set time constant that wherein T is inverter.
The 8th step host computer compares the maximum of the precision of voltage regulation of inverter and permission
Host computer reads the current precision of voltage regulation of inverter, if the precision of voltage regulation within allowing the maximum of precision time, regulates the end-of-job of integral coefficient, current integral coefficient is designated as Ki_ok; If while not meeting the condition of the precision of voltage regulation within allowing the maximum of precision, repeatedly calculate integral coefficient desired value, send to microprocessor, until realize the precision of voltage regulation within the maximum that allows precision till.
Regulate through the circulation several times of above-mentioned steps, realize the size of inverter output voltage and the precision of voltage regulation within the permissible variation scope of target zone.
The present invention has the ability of the inverter output voltage of adjusting fast, with respect to the conventional method of repeatedly revising microprocessor software parameter programming program, has greatly improved the speed of adjusting.Method of the present invention can be compiled into algorithm simultaneously, utilize host computer automatically to complete completely, in improving accuracy, effectively reduce cost of labor.
Accompanying drawing explanation
The circuit diagram of the control method of a kind of shunt chopper output voltage of Fig. 1.
1.E
2pROM chip 2. microprocessor 3.MAX3232 chip 4. host computers
Embodiment
A kind of concrete steps of control method of shunt chopper output voltage are:
The first step is built output voltage regulator
Output voltage regulator, comprising: resistance R, capacitor C, E
2pROM chip, microprocessor, MAX3232 chip, host computer.One end of capacitor C, E
2the Vcc pin of PROM chip is connected with power supply+3.3V end, the other end of capacitor C, E
2the WP pin ground connection of PROM chip.E
2the SCL pin of PROM chip is connected with the IO1 pin of microprocessor, E
2the SDA pin of PROM chip, the IO2 pin of microprocessor are connected with one end of resistance R, and the other end of resistance R is connected with power supply+3.3V end.The TX pin of microprocessor is connected with the T1IN pin of MAX3232 chip, and the RX pin of microprocessor is connected with the R1OUT pin of MAX3232 chip.The T1OUT pin of MAX3232 chip is connected with the RX1 pin of host computer, and the R1IN pin of MAX3232 chip is connected with the TX1 pin of host computer.
Second step host computer sends target voltage values to microprocessor
Host computer sends voltage-target to microprocessor, is designated as Um1.
The 3rd step host computer reads inverter relevant parameter
Host computer sends reading order to microprocessor, and the current output voltage of inverter, proportionality coefficient are recorded, and is designated as respectively Uo1, Kp1.
Proportionality coefficient desired value is sent to microprocessor by the 4th step host computer
Calculating K p1*Um1/Uo1, is designated as Kp2, sets it as new proportionality coefficient and sends to microprocessor.
The 5th step host computer compares the output voltage of inverter and voltage-target
Host computer reads the current output voltage of inverter, if output voltage within the positive and negative permissible variation scope of voltage-target time, regulates the end-of-job of proportionality coefficient, current proportionality coefficient is designated as Kp_ok.
The 6th step host computer reads the inverter relevant parameter in nominal load situation
Inverter band nominal load, host computer sends reading order to microprocessor, and the current output voltage of inverter, proportionality coefficient, integral coefficient, the precision of voltage regulation are recorded, and is designated as respectively Uo2, Kp, Ki1, Jw1; The maximum that the precision of voltage regulation is allowed is designated as Jwm.
Integral coefficient desired value is sent to microprocessor by the 7th step host computer
Calculating K i1+ (Jw1-Jwm) * Kp/T, is designated as Ki2, sets it as new integral coefficient and sends to microprocessor, the set time constant that wherein T is inverter.
The 8th step host computer compares the maximum of the precision of voltage regulation of inverter and permission
Host computer reads the current precision of voltage regulation of inverter, if the precision of voltage regulation within allowing the maximum of precision time, regulates the end-of-job of integral coefficient, current integral coefficient is designated as Ki_ok.
Regulate through the circulation several times of above-mentioned steps, realize the size of inverter output voltage and the precision of voltage regulation within the permissible variation scope of target zone.
Claims (1)
1. a control method for shunt chopper output voltage, is characterized in that the concrete steps of this method are:
The first step, build output voltage regulator:
Output voltage regulator, comprising: resistance R, capacitor C, E
2pROM chip (1), microprocessor (2), MAX3232 chip (3), host computer (4); One end of capacitor C, E
2the Vcc pin of PROM chip (1) is connected with power supply+3.3V end, the other end of capacitor C, E
2the WP pin ground connection of PROM chip (1); E
2the SCL pin of PROM chip (1) is connected with the IO1 pin of microprocessor (2), E
2the SDA pin of PROM chip (1), the IO2 pin of microprocessor (2) are connected with one end of resistance R, and the other end of resistance R is connected with power supply+3.3V end; The TX pin of microprocessor (2) is connected with the T1IN pin of MAX3232 chip (3), and the RX pin of microprocessor (2) is connected with the R1OUT pin of MAX3232 chip (3); The T1OUT pin of MAX3232 chip (3) is connected with the RX1 pin of host computer (4), and the R1IN pin of MAX3232 chip (3) is connected with the TX1 pin of host computer (4);
Second step, host computer (4) sends voltage-target to microprocessor (2):
Host computer (4) sends voltage-target to microprocessor (2), is designated as Um1;
The 3rd step, host computer (4) reads inverter relevant parameter:
Host computer (4) sends reading order to microprocessor (2), and the current output voltage of inverter, proportionality coefficient are recorded, and is designated as respectively Uo1, Kp1;
The 4th step, proportionality coefficient desired value is sent to microprocessor (2) by host computer (4):
Calculating K p1*Um1/Uo1, is designated as Kp2, sets it as new proportionality coefficient and sends to microprocessor (2);
The 5th step, host computer (4) compares the output voltage of inverter and voltage-target:
Host computer (4) reads the current output voltage of inverter, if output voltage within the positive and negative permissible variation scope of voltage-target time, regulates the end-of-job of proportionality coefficient, current proportionality coefficient is designated as Kp_ok; If while not meeting the condition of output voltage within voltage-target Um1 permissible variation scope, repeatedly calculate proportionality coefficient desired value, send to microprocessor (2), until realize output voltage within voltage-target permissible variation scope till; If through repeatedly regulating, still regulate fall short scope, illustrate that the hardware parameter of inverter does not mate, stop regulating and returning to relevant departments and keep in repair;
The 6th step, host computer (4) reads the inverter relevant parameter in nominal load situation:
Inverter band nominal load, host computer (4) sends reading order to microprocessor (2), and the current output voltage of inverter, proportionality coefficient, integral coefficient, the precision of voltage regulation are recorded, and is designated as respectively Uo2, Kp, Ki1, Jw1; The maximum that the precision of voltage regulation is allowed is designated as Jwm;
The 7th step, integral coefficient desired value is sent to microprocessor (2) by host computer (4):
Calculating K i1+ (Jw1-Jwm) * Kp/T, is designated as Ki2, sets it as new integral coefficient and sends to microprocessor (2), the set time constant that wherein T is inverter;
The 8th step, host computer (4) compares the maximum of the precision of voltage regulation of inverter and permission:
Host computer (4) reads the current precision of voltage regulation of inverter, if the precision of voltage regulation within allowing the maximum of precision time, regulates the end-of-job of integral coefficient, current integral coefficient is designated as Ki_ok; If while not meeting the condition of the precision of voltage regulation within allowing the maximum of precision, repeatedly calculate integral coefficient desired value, send to microprocessor (2), until realize the precision of voltage regulation within the maximum that allows precision till;
Regulate through the circulation several times of above-mentioned steps, realize the size of inverter output voltage and the precision of voltage regulation within the permissible variation scope of target zone.
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