CN104682759A - Novel three-phase inverter - Google Patents
Novel three-phase inverter Download PDFInfo
- Publication number
- CN104682759A CN104682759A CN201310626230.4A CN201310626230A CN104682759A CN 104682759 A CN104682759 A CN 104682759A CN 201310626230 A CN201310626230 A CN 201310626230A CN 104682759 A CN104682759 A CN 104682759A
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- Prior art keywords
- circuit
- phase inverter
- control
- adopted
- voltage
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Classifications
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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
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal 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
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal 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, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal 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, e.g. single switched pulse inverters in a bridge configuration
-
- 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
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/007—Plural converter units in cascade
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The invention relates to a novel three-phase inverter, which comprises a hardware structure, a voltage and current sampling module, a signal conversion module, a conditioning circuit, an A/D (analog-to-digital) conversion circuit and a protecting circuit. The protecting circuit ensures overvoltage, overcurrent and undervoltage conditions, and can effectively protect a circuit and a load. A three-phase inverter structure scheme adopting a DSP (Digital Signal Processor) chip TMS320F2812 as a controller is put forward, and includes the designs of a main circuit, a control circuit and a control rule of the three-phase inverter. A digital control method is adopted, the complexity of the control circuit of the three-phase inverter is decreased, and the flexibility of the circuit design is increased. By comparing different control schemes, a bipolar SPWM (Sinusoidal Pulse Width Modulation) algorithm is adopted to generate pulses for controlling the on-off of IGBTs (insulated gate bipolar transistor), and the double-closed loop control of output voltage and filter capacitor current is adopted as PI (proportional-integral) regulation. In terms of closed loop control, the double-closed loop control of voltage and current is adopted, so the inverter has a lot of advantages such as flexible control, high anti-interference capability and high stability.
Description
Technical field
What the present invention relates to is a kind of inversion transformation technique, the Novel Three-phase Inverter of Digital Control specifically.
Background technology
Inverter (Inverter) is exactly a kind of electronic equipment low pressure (12 or 24 volts or 48 volts) direct current being changed into 220 volts of alternating currents.Alternating current is become direct current by conversion by so-called rectification exactly, and for direct-flow electricity utilization apparatus, correspondence with it, DC conversion is alternating current by inversion exactly, for AC electric equipment.Usually the equipment with rectification function is called rectifying installation or rectifier, and the equipment with invert function is called contravariant equipment or inverter.
Inversion transformation technique is based upon a comprehensive practical technique on the Scientific basis such as electronic technology, modern control technology, semiconductor device art, modern power electronics technology and pulse-width modulation (PWM) technology.The investigation and application of inversion theory is the basic reason of inversion transformation technique development.The generation of inverter, makes direct current convert in order to possibility to alternating current.In existing form of power, the various forms of DC power supply such as dry cell, storage battery and solar cell, when these power supplys provide electric energy to AC load, just need inverter.At the speed regulator of alternating current motor, continual power supply, by the power electronic equipments such as the power supply of induction heating, its core is all inverter circuit.In addition, along with the generation of small-sized inverter, make various small-sized power consumption equipment, the interchange electricity consumption as electrical equipment such as notebook computer, digital camera, mobile phones is ensured reliably.In the development and application industry of novel energy, inverter is essential especially.
Summary of the invention
The object of the present invention is to provide a kind of Novel Three-phase Inverter of Digital Control.The present invention also aims to the control method that a kind of novel inverter is provided.
The object of the present invention is achieved like this:
A kind of Novel Three-phase Inverter, its composition comprises: hardware configuration, voltage and current sample module, signal conversion module, modulate circuit, A/D modular converter, protective circuit.Wherein protective circuit ensures overvoltage, overcurrent, undervoltage condition, can available protecting circuit and load.
Described a kind of three-phase inverter, it is characterized in that software section mainly comprises system initialization routine, AD sampling routine, pwm pulse generating routine and PI controling parameters algorithm for design program, first the interrupt routine of timer is carried out after system initialization, then A/D Sampling interrupt is entered into, carry out detection to A/D sampling to analyze, guarantee the adjustment carrying out PI after adopted signal meets the requirements, then the generation that full comparator carries out the impulse waveform of PWM is delivered to, for the underproof sampled signal of detection, system does not carry out the generation of PI adjustment and PWM, and carry out troubleshooting.
As shown in Figure 1, the voltage of output and capacitance current, through over-sampling, are converted into voltage signal to the hardware block diagram of three-phase inverter, are converted to the acceptable level of TMS320F2812 through modulate circuit, deliver to the A/D modular converter of TMS320F2812.Setting needs the magnitude of voltage exported, and realizes communication by SCI module and DSP.Through PI regulating and controlling after reference voltage and the output voltage of sampling gained compare, as the benchmark of electric current loop, through P regulable control after the capacitance current of electric current loop benchmark and current sample compares, full comparator is sent to as sinusoidal modulation wave, compare with high frequency triangular carrier, the pwm signal produced is exported by PWM and delivers to drive circuit, drives the IGBT break-make of three-phase inverter.Protective circuit is in order to ensure available protecting circuit and load under overvoltage, overcurrent, undervoltage condition.
Control method of the present invention mainly comprises: system initialization routine, AD sampling routine, pwm pulse generating routine and PI controling parameters algorithm for design program etc., general design of software flow process as shown in Figure 2.Can be drawn clearly by flow chart, first the interrupt routine of timer is carried out after system initialization, then A/D Sampling interrupt is entered into, carry out detection to A/D sampling to analyze, guarantee the adjustment carrying out PI after adopted signal meets the requirements, then deliver to the generation that full comparator carries out the impulse waveform of PWM; For the underproof sampled signal of detection, system does not carry out the generation of PI adjustment and PWM, and carries out troubleshooting.For PI parameter designing, what adopt is the PI controling parameters algorithm for design of increment type, this control algolithm carries out the calculating of controlled quentity controlled variable, the signal of voltage and current sample circuit collection delivers to DSP after the filtering and conditioning of signal conditioning circuit, data are through the computing with the contrast of input value laggard line number word PI, thus the control realized output voltage and adjustment, the flow chart of the PI control algolithm of increment type is as shown in Figure 3.
Obtained the controling parameters q0 of system by flow chart, q1, if initial value en=0, read in the numerical value Cn of sampling, then calculation deviation value en=Rn-Cn, and calculate controlled quentity controlled variable, the deviate of subsequent time was the initial value of the deviate in a upper moment.
Advantage of the present invention and effect:
1. adopt the features such as SPWM control mode produces the pulse of control IGBT power switch state, and it is good that SPWM control technology has dynamic property, and efficiency is high, and harmonic wave is few, can significantly improve three-phase inverter output waveform.
2. adopt the double-closed-loop control of capacitive current inner ring, outer voltage, can improve the load performance of three-phase inverter, voltage follow performance improves, and when load characteristic changes, can not cause large change in voltage.
3. adopt the design based on the controling parameters of continuous domain, equivalent-simplification is carried out to capacitive current inner ring and outer voltage, be convenient to calculate.
Accompanying drawing explanation
Fig. 1 is hardware block diagram of the present invention;
Fig. 2 is general design of software flow process of the present invention;
Fig. 3 is the flow chart of the PI control algolithm of increment type of the present invention.
Embodiment
The specific embodiment of the present invention is such:
A kind of Novel Three-phase Inverter, its composition comprises: hardware configuration, voltage and current sample module, signal conversion module, modulate circuit, A/D modular converter, protective circuit.Wherein protective circuit ensures overvoltage, overcurrent, undervoltage condition, can available protecting circuit and load.
It is characterized in that software section mainly comprises system initialization routine, AD sampling routine, pwm pulse generating routine and PI controling parameters algorithm for design program, first the interrupt routine of timer is carried out after system initialization, then A/D Sampling interrupt is entered into, carry out detection to A/D sampling to analyze, guarantee the adjustment carrying out PI after adopted signal meets the requirements, then the generation that full comparator carries out the impulse waveform of PWM is delivered to, for the underproof sampled signal of detection, system does not carry out the generation of PI adjustment and PWM, and carries out troubleshooting.
Be the hardware block diagram of three-phase inverter as shown in Figure 1, can know from figure, the voltage that inverter exports and capacitance current, through over-sampling, are converted into voltage signal, be converted to the acceptable level of TMS320F2812 through modulate circuit, deliver to the A/D modular converter of TMS320F2812.Setting needs the magnitude of voltage exported, and realizes communication by SCI module and DSP.Through PI regulating and controlling after reference voltage and the output voltage of sampling gained compare, as the benchmark of electric current loop, through P regulable control after the capacitance current of electric current loop benchmark and current sample compares, full comparator is sent to as sinusoidal modulation wave, compare with high frequency triangular carrier, the pwm signal produced is exported by PWM and delivers to drive circuit, drives the IGBT break-make of three-phase inverter.Protective circuit is in order to ensure available protecting circuit and load under overvoltage, overcurrent, undervoltage condition.
System control method is illustrated in figure 2 general design of software flow process.Can be drawn clearly by flow chart, first the interrupt routine of timer is carried out after system initialization, then A/D Sampling interrupt is entered into, carry out detection to A/D sampling to analyze, guarantee the adjustment carrying out PI after adopted signal meets the requirements, then deliver to the generation that full comparator carries out the impulse waveform of PWM; For the underproof sampled signal of detection, system does not carry out the generation of PI adjustment and PWM, and carries out troubleshooting.For PI parameter designing, what adopt is the PI controling parameters algorithm for design of increment type, this control algolithm carries out the calculating of controlled quentity controlled variable, the signal of voltage and current sample circuit collection delivers to DSP after the filtering and conditioning of signal conditioning circuit, data are through the computing with the contrast of input value laggard line number word PI, thus the control realized output voltage and adjustment, be illustrated in figure 3 the flow chart of the PI control algolithm of increment type
Obtained the controling parameters q0 of system by flow chart, q1, if initial value en=0, read in the numerical value Cn of sampling, then calculation deviation value en=Rn-Cn, and calculate controlled quentity controlled variable, the deviate of subsequent time was the initial value of the deviate in a upper moment.
Claims (2)
1. a Novel Three-phase Inverter, its composition comprises: hardware configuration, voltage and current sample module, signal conversion module, modulate circuit, A/D modular converter, protective circuit.Wherein protective circuit ensures overvoltage, overcurrent, undervoltage condition, can available protecting circuit and load.
2. a kind of three-phase inverter according to claim 1, it is characterized in that software section mainly comprises system initialization routine, AD sampling routine, pwm pulse generating routine and PI controling parameters algorithm for design program, first the interrupt routine of timer is carried out after system initialization, then A/D Sampling interrupt is entered into, carry out detection to A/D sampling to analyze, guarantee the adjustment carrying out PI after adopted signal meets the requirements, then the generation that full comparator carries out the impulse waveform of PWM is delivered to, for the underproof sampled signal of detection, system does not carry out the generation of PI adjustment and PWM, and carry out troubleshooting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310626230.4A CN104682759A (en) | 2013-11-28 | 2013-11-28 | Novel three-phase inverter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310626230.4A CN104682759A (en) | 2013-11-28 | 2013-11-28 | Novel three-phase inverter |
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| CN104682759A true CN104682759A (en) | 2015-06-03 |
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| CN201310626230.4A Pending CN104682759A (en) | 2013-11-28 | 2013-11-28 | Novel three-phase inverter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105375806A (en) * | 2015-12-27 | 2016-03-02 | 哈尔滨米米米业科技有限公司 | Novel three-phase inverter |
| CN113037122A (en) * | 2021-05-11 | 2021-06-25 | 南京航空航天大学 | Double three-phase bridge parallel controller and frequency multiplication modulation method thereof |
Citations (5)
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| CN101462197A (en) * | 2008-10-22 | 2009-06-24 | 深圳市鸿栢科技实业有限公司 | High-frequency inversion stud welding equipment and controlling means thereof |
| US20110286253A1 (en) * | 2010-05-20 | 2011-11-24 | FeCon GmbH | Three-phase inverter circuit and method for operating a three-phase inverter circuit |
| CN202059343U (en) * | 2011-06-08 | 2011-11-30 | 黑龙江科技学院 | Inverse power supply system based on DSP (Digital Signal Processor) |
| CN102957369A (en) * | 2012-11-20 | 2013-03-06 | 无锡商业职业技术学院 | Brushless DC (Direct Current) motor speed regulation device on basis of DSP (Digital Signal Processor) |
| CN103414210A (en) * | 2013-07-31 | 2013-11-27 | 广西大学 | Photovoltaic grid-connected device based on SOPC |
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2013
- 2013-11-28 CN CN201310626230.4A patent/CN104682759A/en active Pending
Patent Citations (5)
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| CN101462197A (en) * | 2008-10-22 | 2009-06-24 | 深圳市鸿栢科技实业有限公司 | High-frequency inversion stud welding equipment and controlling means thereof |
| US20110286253A1 (en) * | 2010-05-20 | 2011-11-24 | FeCon GmbH | Three-phase inverter circuit and method for operating a three-phase inverter circuit |
| CN202059343U (en) * | 2011-06-08 | 2011-11-30 | 黑龙江科技学院 | Inverse power supply system based on DSP (Digital Signal Processor) |
| CN102957369A (en) * | 2012-11-20 | 2013-03-06 | 无锡商业职业技术学院 | Brushless DC (Direct Current) motor speed regulation device on basis of DSP (Digital Signal Processor) |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105375806A (en) * | 2015-12-27 | 2016-03-02 | 哈尔滨米米米业科技有限公司 | Novel three-phase inverter |
| CN113037122A (en) * | 2021-05-11 | 2021-06-25 | 南京航空航天大学 | Double three-phase bridge parallel controller and frequency multiplication modulation method thereof |
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Application publication date: 20150603 |
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