CN103066914A - Direct power control system of high power factor induction motor - Google Patents
Direct power control system of high power factor induction motor Download PDFInfo
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- CN103066914A CN103066914A CN2012105631190A CN201210563119A CN103066914A CN 103066914 A CN103066914 A CN 103066914A CN 2012105631190 A CN2012105631190 A CN 2012105631190A CN 201210563119 A CN201210563119 A CN 201210563119A CN 103066914 A CN103066914 A CN 103066914A
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E40/30—Reactive power compensation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
A direct power control system of a high power factor induction motor realizes energy-saving control of a three-phase induction motor under the condition of light load or no load. The direct power control system of the high power factor induction motor comprises a controller using a digital signal processor TMS320F2808 as the core, a three-phase bridge power amplification device, a three-phase bridge driving circuit, the three-phase induction motor, a three-phase diode rectifier, a power factor detecting link, a current detecting link, an encoder rotating speed detecting link, a power factor measuring link, a + 24V switching power supply, a +15V switching power, a +/- switching power supply, a +5V switching power and the like. By means of the direct power control system applying power factor measurement, the stator flux linkage amplitude of the three-phase induction motor under the condition of light load or no load is controlled, instantaneous reactive power of the motor is adjusted, and therefore the motor power factor is effectively improved and a good energy-saving effect is achieved.
Description
Technical field
The present invention relates to High Power Factor induction motor direct Power Control system, belong to the power electronics and power drives field, be used for realizing the Energy Saving Control of three phase induction motor under underloading or idle condition.
Background technology
Along with the development of science and technology and the raising of the level of production, also increasing to the demand of electric energy.The total electricity consumption situation from countries in the world, the electric energy of motor consumption account for 60%～70% of generating total amount.In short supply at present world energy sources, in the situation of electric power supply deficiency, the power saving of further investigation motor has important practical significance.
Three phase induction motor is a widely used class alternating current motor in the industry, and when three phase induction motor moved under underloading or idle condition, its power factor only can reach 0.1-0.3, and the electric system energy consumption is larger.Therefore, improve the power factor of three phase induction motor under underloading or idle condition, realize that the energy-saving run of three phase induction motor is one of key technology that needs key breakthrough.
Three phase induction motor is under different load, and its operational efficiency is different.Three phase induction motor generally all designs when approaching at full capacity, and its operational efficiency is for the highest.And in fact, motor is in underloading in the time in a big chunk often, or even under zero load, move.This has just caused very large energy dissipation.
The following two kinds of methods of the energy-conservation at present common employing of three phase induction motor: first design high-efficiency electric motor, but the efficient of this motor when underloading is still undesirable; It two is the methods that adopt AC voltage adjusting, namely according to the load variations of motor, the winding both end voltage of automatic regulating electric machine, to reduce input power, improve the operational efficiency of motor, but the three-phase inverter of the method need to adopt thyristor to cut control circuit, and harmonic content is high, vibration noise is large, has a strong impact on electrical machinery life.
Summary of the invention
The technical problem that the present invention solves is: overcome existing three phase induction motor AC voltage adjusting energy-saving control method owing to having adopted the SCR AC pressure regulation, when the angle of flow hour, current waveform occurs interrupted, power factor is difficult to detect, and affect the problem of pressure regulating energy-saving frequency converter safe operation when having avoided the electrical network severe three-phase uneven, a kind of three phase induction motor direct Power Control system is provided, has greatly improved the operational efficiency under three phase induction motor underloading or the idle condition.
Technical solution of the present invention: High Power Factor induction motor direct Power Control system, it is characterized in that comprising: digital signal processor TMS320F2808 is the controller 1 of core, three-phase bridge power amplifier 2, three-phase bridge drive circuit 3, three phase induction motor 4, three-phase diode rectifier 5, power factor detection 6, current detecting link 7, encoder rotating speed detection 8, + 24V Switching Power Supply 9, + 15V Switching Power Supply 10, ± 12V Switching Power Supply 11, + 5V Switching Power Supply 12, power factor detection 6, the output of current detecting link 7 and encoder rotating speed detection 8 is connected to the controller 1 that digital signal processor TMS320F2808 is core, digital signal processor TMS320F2808 is that 6 road pwm signals of controller 1 output of core are connected to three-phase bridge drive circuit 3, three-phase bridge drive circuit 3 connects three-phase bridge power amplifier 2, the three-phase power electric of electrical network input is connected to three-phase bridge power amplifier 2 through three-phase diode rectifier 5, the output of three-phase bridge power amplifier 2 connects three phase induction motor 4, + 5V Switching Power Supply 12 connects the controller 1 that digital signal processor TMS320F2808 is core after level conversion, ± 12V Switching Power Supply 11 connects power factor detection 6 and current detecting link 7, three-phase bridge drive circuit 3 is by 10 power supplies of+15V Switching Power Supply, when moving under 10%～60% operating mode of three phase induction motor 4 at nominal load, in order to make motor working current minimum, and raising power factor, adopt two-way parallel controller structure, wherein one the tunnel is the rotating speed outer shroud, ring controller in the active power, by regulating load angle control active power, reach the purpose of control electromagnetic torque; Another road is reactive power controller, reactive power is equalled zero given as reactive power controller, change the stator magnetic linkage amplitude and regulate reactive power, make it to go to zero in the situation that do not affect active power adjustment reactive power, realize Energy Saving Control, ring control algolithm and Reactive Power Control algorithm are realized in digital signal processor TMS320F2808 is the controller 1 of core in rotating speed outer shroud control algolithm, the active power.
Principle of the present invention is: as shown in Figure 3, the controller that described digital signal processor TMS320F2808 is core obtains speed feedback signal from the encoder rotating speed detection that joins with three phase induction motor, digital signal processor TMS320F2808 is that the controller of core is poor with the feedback tach signal with reference to tach signal, input variable as PID rotating speed control algolithm, PID rotating speed control algolithm is that output variable after the controller computing of core is as the stagnate active power reference of ring control algolithm of active power through digital signal processor TMS320F2808, after being tied to α β coordinate system transformation through the abc coordinate, the instantaneous value that the value of feedback of active power is detected by the current detecting link calculates acquisition, active power reference value and value of feedback are done poor by meritorious by-pass cock amount of output after the ring control algolithm that stagnates, and PID rotating speed control algolithm and abc coordinate are tied to α β coordinate system transformation and all realize in digital signal processor TMS320F2808 is the controller of core.Equally, the reference input zero setting of reactive power, the value of feedback of reactive power also is to calculate acquisition through the abc coordinate by the instantaneous value that the current detecting link detects after α β coordinate transform, and reactive power reference qref and value of feedback are done poor by exporting idle by-pass cock amount after the ring control algolithm computing that stagnates.Select suitable voltage vector to generate 6 road pwm signals according to the meritorious by-pass cock amount of two ring outputs that stagnate and the sector at idle by-pass cock amount and stator winding magnetic linkage place, 6 road pwm signals are controlled the stator winding magnetic linkage by track and the speed operation of expectation through the power device conducting that the three-phase bridge drive circuit triggers corresponding three-phase bridge power amplifier, realize the direct Power Control of three phase induction motor.While digital signal processor TMS320F2808 is that the controller of core is regulated reactive power according to power factor detection 6 acquisition three phase induction motor instantaneous power factors.
The present invention's advantage compared with prior art is:
(1) compare with the three phase induction motor control system that adopts vector control and have that algorithm is simple, operand is little, can regulate reactive power, the Effective Raise power factor, thus realize the energy-conservation of three phase induction motor under the low load behavior.
(2) generate switching signal by the ring control that stagnates, can realize instantaneous active power and the reactive power of system are accurately controlled, and the system load sudden change is had good dynamic response performance.
Description of drawings
Fig. 1 is the composition frame chart of High Power Factor induction motor direct Power Control of the present invention system;
Fig. 2 is the direct Power Control system construction drawing that digital signal processor TMS320F2808 of the present invention is core controller;
Fig. 3 is direct Power Control theory diagram of the present invention.
Embodiment
Such as Fig. 1, the present invention is the controller 1 of core by digital signal processor TMS320F2808, three-phase bridge power amplifier 2, three-phase bridge drive circuit 3, three phase induction motor 4, three-phase diode rectifier 5, power factor detection 6, current detecting link 7, encoder rotating speed detection 8, + 24V Switching Power Supply 9, + 15V Switching Power Supply 10, ± 12V Switching Power Supply 11, + 5V Switching Power Supply 12, power factor detection 6, the output of current detecting link 7 and encoder rotating speed detection 8 is connected to the controller 1 that digital signal processor TMS320F2808 is core, digital signal processor TMS320F2808 is that 6 road pwm signals of controller 1 output of core are connected to three-phase bridge drive circuit 3, three-phase bridge drive circuit 3 connects three-phase bridge power amplifier 2, the three-phase power electric of electrical network input is connected to three-phase bridge power amplifier 2 through three-phase diode rectifier 5, the output of three-phase bridge power amplifier 2 connects three phase induction motor 4, + 5V Switching Power Supply 12 connects the controller 1 that digital signal processor TMS320F2808 is core after level conversion, ± 12V Switching Power Supply 11 connects power factor detection 6 and current detecting link 7, three-phase bridge drive circuit 3 is by 10 power supplies of+15V Switching Power Supply, when moving under 10%～60% operating mode of three phase induction motor 4 at nominal load, in order to make motor working current minimum, and raising power factor, adopt two-way parallel controller structure, wherein one the tunnel is the rotating speed outer shroud, ring controller in the active power, by regulating load angle control active power, reach the purpose of control electromagnetic torque; Another road is reactive power controller, reactive power is equalled zero given as reactive power controller, change the stator magnetic linkage amplitude and regulate reactive power, make it to go to zero in the situation that do not affect active power adjustment reactive power, realize Energy Saving Control, ring control algolithm and Reactive Power Control algorithm are realized in digital signal processor TMS320F2808 is the controller 1 of core in rotating speed outer shroud control algolithm, the active power.
Speed feedback signal obtains from encoder rotating speed detection 8 when three phase induction motor 4 moves under certain rotating speed and load behavior, the output signal of encoder rotating speed detection 8 is that the capturing unit of the controller 1 of core is caught by digital signal processor TMS320F2808, the output signal of power factor detection 6 and current detecting link 7 is that the A/D module of the controller 1 of core is sampled by digital signal processor TMS320F2808, digital signal processor TMS320F2808 is that 6 road pwm signals of controller 1 output of core trigger three-phase bridge power amplifier 2 corresponding power devices after three-phase bridge drive circuit 3 carries out power amplification, drive three phase induction motor 4 and realize rotating speed control and power adjustments, three-phase bridge power amplifier 2 is by the output power supply of three-phase diode rectifier 5, three-phase bridge drive circuit 3 is by 10 power supplies of+15V Switching Power Supply, digital signal processor TMS320F2808 is that the controller 1 of core is by 12 power supplies of+5V Switching Power Supply, power factor detection 6 and current detecting link 7 are by 11 power supplies of 12V Switching Power Supply, and 24V Switching Power Supply 9 is used for the soft start power supply of three-phase diode rectifier 5.
As shown in Figure 2, digital signal processor TMS320F2808 of the present invention is core controller 1 is comprised of digital I/O module and capturing unit module, A/D module, CPU, memory and PWM waveform generation module.When the given reference rotation velocity of three phase induction motor 4 control system and starting operation, digital signal processor TMS320F2808 is that the capturing unit module in the controller 1 of core is obtained speed feedback signal from encoder rotating speed detection 8, do with reference to rotating speed and feedback rotating speed and to be input to the PID rotational speed governor after poor, the output of PID rotational speed governor stagnates as the active power ring and encircles the active power reference of control algolithm, the electric current that obtains with the A/D module samples that through digital signal processor TMS320F2808 is the controller 1 of core subtracts each other through the active power feedback value of coordinate transform and instantaneous power calculating acquisition, difference stagnates as the active power ring and encircles the input variable of control algolithm, the value of the comparand register of output variable in the PWM waveform generation module of the controller 1 take digital signal processor TMS320F2808 as core of the stagnant ring of active power ring control algolithm compares and generates the PWM waveform, pwm signal is through three-phase bridge drive circuit 3, and the rotating speed of three phase induction motor 4 is regulated in the power device conducting that triggers corresponding three-phase bridge power amplifier 2.Obtain three phase induction motor instantaneous power factor according to power factor detection 6 and regulate reactive power.
The generation of the abc coordinate among Fig. 3 is tied to that α β coordinate transform, PID rotating speed control algolithm, instantaneous active power are calculated and instantaneous reactive power calculates and two parallel-connection structures stagnate ring control and the switch list all digital signal processor TMS320F2808 in Fig. 1 realizes in the controller 1 of core.
The non-elaborated part of the present invention belongs to techniques well known.
The above; only be part embodiment of the present invention, but protection scope of the present invention is not limited to this, any those skilled in the art are in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.
Claims (2)
1. High Power Factor induction motor direct Power Control system is characterized in that: comprise digital signal processor TMS320F2808 be core controller (1), three-phase bridge power amplifier (2), three-phase bridge drive circuit (3), three phase induction motor (4), three-phase diode rectifier (5), power factor detection (6), current detecting link (7), encoder rotating speed detection (8) ,+24V Switching Power Supply (9) ,+15V Switching Power Supply (10), ± 12V Switching Power Supply (11) and+5V Switching Power Supply (12); Power factor detection (6) wherein, the output of current detecting link (7) and encoder rotating speed detection (8) is connected to the controller that digital signal processor TMS320F2808 is core (1), digital signal processor TMS320F2808 is that 6 road pwm signals of controller (1) output of core are connected to three-phase bridge drive circuit (3), three-phase bridge drive circuit (3) connects three-phase bridge power amplifier (2), the three-phase power electric of electrical network input is connected to three-phase bridge power amplifier (2) through three-phase diode rectifier (5), the output of three-phase bridge power amplifier (2) connects three phase induction motor (4), + 5V Switching Power Supply (12) is given digital signal processor TMS320F2808 after level conversion be controller (1) power supply of core, ± 12V Switching Power Supply (11) is given power factor detection (6) and current detecting link (7) power supply, and three-phase bridge drive circuit (3) is powered by+15V Switching Power Supply (10); When moving under 10%～60% operating mode of three phase induction motor (4) at nominal load, in order to make motor working current minimum, and raising power factor, adopt two-way parallel controller structure, wherein one the tunnel is ring controller in rotating speed outer shroud, the active power, by regulating load angle control active power, reach the purpose of control electromagnetic torque; Another road is reactive power controller, reactive power is equalled zero given as reactive power controller, change the stator magnetic linkage amplitude and regulate reactive power, make it to go to zero in the situation that do not affect active power adjustment reactive power, realize Energy Saving Control, ring control algolithm and Reactive Power Control algorithm are realization in the controller (1) of core at digital signal processor TMS320F2808 in rotating speed outer shroud control algolithm, the active power.
2. High Power Factor induction motor direct Power Control according to claim 1 system, it is characterized in that: the controller (1) that described digital signal processor TMS320F2808 is core obtains speed feedback signal from the encoder rotating speed detection (8) that joins with three phase induction motor (4), digital signal processor TMS320F2808 is that the controller (1) of core is poor with the feedback tach signal with reference to tach signal, as the input variable that at digital signal processor TMS320F2808 is controller (1) the PID rotating speed control algolithm of core, PID rotating speed control algolithm is that output variable after controller (1) computing of core is as the stagnate active power reference of ring control algolithm of active power through digital signal processor TMS320F2808, calculate acquisition after the instantaneous value that the value of feedback of active power is detected by current detecting link (7) is tied to α β coordinate system transformation through the abc coordinate, active power reference value and value of feedback are done poor by exporting a meritorious by-pass cock amount after the ring control algolithm that stagnates; Equally, the reference input zero setting of reactive power, the value of feedback of reactive power also is to calculate acquisition after being tied to α β coordinate system transformation by the instantaneous value that current detecting link (7) detects through the abc coordinate, and reactive power reference qref and value of feedback are done poor by exporting idle by-pass cock amount after the ring control algolithm computing that stagnates; Be that the meritorious by-pass cock amount of two ring outputs that stagnate realizing in the controller (1) of core and the sector at idle by-pass cock amount and stator winding magnetic linkage place select suitable voltage vector to generate 6 road pwm signals according to digital signal processor TMS320F2808,6 road pwm signals are controlled the stator winding magnetic linkage by track and the speed operation of expectation through the power device conducting that three-phase bridge drive circuit (3) triggers corresponding three-phase bridge power amplifier (2), realize the High Power Factor power control of three phase induction motor (4); Digital signal processor TMS320F2808 is that the controller (1) of core is regulated reactive power according to power factor detection (6) acquisition three phase induction motor instantaneous power factor.
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Cited By (5)
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| CN106953576A (en) * | 2017-05-02 | 2017-07-14 | 哈尔滨理工大学 | Induction machine underloading judgment means and method |
| CN107370438A (en) * | 2017-06-19 | 2017-11-21 | 湖南海博瑞德电智控制技术有限公司 | A kind of Simple air conditioner compressor controller |
| WO2021109861A1 (en) * | 2019-12-04 | 2021-06-10 | 中国科学院深圳先进技术研究院 | Electric motor control method and apparatus, terminal device, and storage medium |
| CN113454904A (en) * | 2019-03-12 | 2021-09-28 | 阿莱戈微系统有限责任公司 | Motor controller with power feedback loop |
| CN113992095A (en) * | 2021-09-30 | 2022-01-28 | 江苏大学 | Low-complexity direct power control method for dual three-phase permanent magnet synchronous generator PMSG model prediction |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106953576A (en) * | 2017-05-02 | 2017-07-14 | 哈尔滨理工大学 | Induction machine underloading judgment means and method |
| CN107370438A (en) * | 2017-06-19 | 2017-11-21 | 湖南海博瑞德电智控制技术有限公司 | A kind of Simple air conditioner compressor controller |
| CN113454904A (en) * | 2019-03-12 | 2021-09-28 | 阿莱戈微系统有限责任公司 | Motor controller with power feedback loop |
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| CN113454904B (en) * | 2019-03-12 | 2024-04-05 | 阿莱戈微系统有限责任公司 | Motor controller with power feedback loop |
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| CN113992095A (en) * | 2021-09-30 | 2022-01-28 | 江苏大学 | Low-complexity direct power control method for dual three-phase permanent magnet synchronous generator PMSG model prediction |
| CN113992095B (en) * | 2021-09-30 | 2024-05-10 | 江苏大学 | Low-complexity direct power control method for PMSG model prediction of double-three-phase permanent magnet synchronous generator |
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Effective date of registration: 20161010 Address after: 101300, 26, Juyuan West Road, Ma Ma Town, Beijing, Shunyi District Patentee after: BEIJING HONGHUI INTERNATIONAL ENERGY TECHNOLOGY DEVELOPMENT CO., LTD. Address before: 100191 Haidian District, Xueyuan Road, No. 37, Patentee before: Beihang University |