CN102006003A - Three-phase asynchronous motor economizer - Google Patents
Three-phase asynchronous motor economizer Download PDFInfo
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- CN102006003A CN102006003A CN2010105667742A CN201010566774A CN102006003A CN 102006003 A CN102006003 A CN 102006003A CN 2010105667742 A CN2010105667742 A CN 2010105667742A CN 201010566774 A CN201010566774 A CN 201010566774A CN 102006003 A CN102006003 A CN 102006003A
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Abstract
The invention provides a three-phase asynchronous motor economizer, which is mainly characterized in that: synchronous signals selected from the three-phase voltage of a power grid are subjected to zero-crossing detection and then compared with thyristor conducting signals representing motor current zero-crossing points to form phi angle signals. A power factor value COS phi and a stator end voltage are input into a fuzzy controller and demodulated to obtain a thyristor phase shifting trigger angle alpha, and anti-parallel thyristor phase controlled voltage adjustment is adopted in the main loop of a controller. The control loop consists of a closed loop formed by the detected power factor angle and the stator end voltage. The three-phase asynchronous motor economizer has the advantages that: the motor is controlled by adopting methods of voltage adjustment and frequency adjustment in the economizer, and the size of the trigger angle alpha is adjusted according to the changes of the power factor and the stator end voltage in fuzzy voltage adjustment energy-saving control so as to fulfill the purposes of adjusting the stator end voltage, adjusting the voltage and saving the energy.
Description
Technical field
The present invention relates to a kind of threephase asynchronous, particularly a kind of energy-saving controller that is used for threephase asynchronous.
Background technology
At present, 60% of China's energy output has been consumed by various motors, it is estimated, its electric weight reaches about 40,000,000,000 yuan, because the difference of each motor model and manufacturing process, traditional asynchronous motor Energy Saving Control mode is loaded down with trivial details, energy-saving effect is very bad, therefore, cause huge waste, bring massive losses to country.
Summary of the invention
The objective of the invention is the deficiency that exists in the above-mentioned technology, a kind of energy-saving controller of threephase asynchronous is provided.By the power factor closed-loop control, obtain the most energy-conservation effect.Therefore, Fuzzy control system adopts the structure of the single output of dual input, realizes power saving function.
Annual by the electric weight of saving 10%, then can save 4,000,000,000 yuan.
The object of the present invention is achieved like this: by motor and measurement mechanism, and the soft start module, the power factor module, the digital filter module, fuzzy control model is formed.It is characterized in that fuzzy Energy Saving Control mainly is divided into pressure regulation and two kinds of Energy Saving Controls of frequency modulation.Fuzzy pressure regulating energy-saving control just relates to frequency modulation control when starting.Be to reach pressure regulation technical ability purpose in fuzzy pressure regulating energy-saving control according to the size that trigger angle α is regulated in the variation of power factor and stator terminal voltage.The controller major loop adopts the anti-parallel thyristor phase control.The closed loop that control loop is made up of power-factor angle that detects and stator terminal voltage constitutes.Control procedure is as follows: by to taking from the synchronizing signal zero passage detection of electrical network three-phase voltage, think relatively to form the φ angle signal with the thyristor Continuity signal of representing the current of electric zero crossing.With power factor value COS φ and stator terminal voltage input fuzzy controller.
The invention has the beneficial effects as follows, this energy-saving appliance adopts the method for pressure regulation and frequency modulation to come motor is controlled, in the control of fuzzy pressure regulating energy-saving, regulate the size of trigger angle α according to the variation of the voltage of power factor and stator terminal, thereby reach the purpose of pressure regulating energy-saving.
Description of drawings:
The functional-block diagram of Fig. 1 energy-saving controller
Embodiment:
Below in conjunction with accompanying drawing present embodiment is described further:
As shown in Figure 1, adopt analog control technique,, and when electric motor starting, adopt variable frequency control by the pressure regulating energy-saving scheme of power factor closed-loop control.
Fuzzy Energy Saving Control mainly is divided into pressure regulation and two kinds of Energy Saving Controls of frequency modulation.Fuzzy pressure regulating energy-saving control just relates to frequency modulation control when starting.The technology of fuzzy control is used based on a large amount of expertises or trial curve.Be to reach pressure regulation technical ability purpose in fuzzy pressure regulating energy-saving control according to the size that trigger angle α is regulated in the variation of power factor and stator terminal voltage.The mode of connection of entire controller control loop is very succinct, after having adopted computer control, the reliability of whole system and self-shield ability is strengthened greatly.
The controller major loop adopts the anti-parallel thyristor phase control.The closed loop that control loop is made up of power-factor angle that detects and stator terminal voltage constitutes.Control procedure is as follows: by to taking from the synchronizing signal zero passage detection of electrical network three-phase voltage, think relatively to form the φ angle signal with the thyristor Continuity signal of representing the current of electric zero crossing.With power factor value COS φ and stator terminal voltage input fuzzy controller, upon mediation can obtain thyristor phase shift trigger angle α, thereby reaches adjusting stator terminal voltage, energy saving purposes.
Claims (1)
1. threephase asynchronous energy-saving appliance, by motor and measurement mechanism, the soft start module, the power factor module, the digital filter module, fuzzy control model is formed, and it is characterized in that fuzzy Energy Saving Control mainly is divided into pressure regulation and two kinds of Energy Saving Controls of frequency modulation; Fuzzy pressure regulating energy-saving control, just when starting, relate to frequency modulation control, be to reach pressure regulation technical ability purpose in fuzzy pressure regulating energy-saving control according to the size that trigger angle α is regulated in the variation of power factor and stator terminal voltage, the controller major loop adopts the anti-parallel thyristor phase control, the closed loop that control loop is made up of power-factor angle that detects and stator terminal voltage constitutes, control procedure is as follows: by to taking from the synchronizing signal zero passage detection of electrical network three-phase voltage, think relatively to form the φ angle signal with the thyristor Continuity signal of representing the current of electric zero crossing, with power factor value COS φ and stator terminal voltage input fuzzy controller, by motor and measurement mechanism, the soft start module, the power factor module, the digital filter module, fuzzy control model is formed, it is characterized in that, fuzzy Energy Saving Control mainly is divided into pressure regulation and two kinds of Energy Saving Controls of frequency modulation, fuzzy pressure regulating energy-saving control, just when starting, relate to frequency modulation control, be to reach pressure regulation technical ability purpose in fuzzy pressure regulating energy-saving control according to the size that trigger angle α is regulated in the variation of power factor and stator terminal voltage, the controller major loop adopts the anti-parallel thyristor phase control, the closed loop that control loop is made up of power-factor angle that detects and stator terminal voltage constitutes, control procedure is as follows: by to taking from the synchronizing signal zero passage detection of electrical network three-phase voltage, think relatively to form the φ angle signal with the thyristor Continuity signal of representing the current of electric zero crossing, with power factor value COS φ and stator terminal voltage input fuzzy controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105667742A CN102006003A (en) | 2010-12-01 | 2010-12-01 | Three-phase asynchronous motor economizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105667742A CN102006003A (en) | 2010-12-01 | 2010-12-01 | Three-phase asynchronous motor economizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102006003A true CN102006003A (en) | 2011-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010105667742A Pending CN102006003A (en) | 2010-12-01 | 2010-12-01 | Three-phase asynchronous motor economizer |
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| CN (1) | CN102006003A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102315807A (en) * | 2011-09-06 | 2012-01-11 | 程小榕 | Novel soft-start intelligent power-saving controller for motor |
| CN102655385A (en) * | 2012-01-05 | 2012-09-05 | 三一重型装备有限公司 | Soft starter of three-phase asynchronous motor and control method of soft starter |
| CN107222149A (en) * | 2017-07-28 | 2017-09-29 | 天津理工大学 | Motor power factor detecting system under the conditions of a kind of non-sinusoidal power supply |
| CN109230871A (en) * | 2018-10-12 | 2019-01-18 | 常州市新创智能科技有限公司 | A kind of phase asynchronous torque motor unwinding driving circuit of induction type and method |
-
2010
- 2010-12-01 CN CN2010105667742A patent/CN102006003A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102315807A (en) * | 2011-09-06 | 2012-01-11 | 程小榕 | Novel soft-start intelligent power-saving controller for motor |
| CN102315807B (en) * | 2011-09-06 | 2014-10-15 | 程小榕 | Novel soft-start intelligent power-saving controller for motor |
| CN102655385A (en) * | 2012-01-05 | 2012-09-05 | 三一重型装备有限公司 | Soft starter of three-phase asynchronous motor and control method of soft starter |
| CN102655385B (en) * | 2012-01-05 | 2015-09-02 | 三一重型装备有限公司 | Threephase asynchronous machine soft starter and control method thereof |
| CN107222149A (en) * | 2017-07-28 | 2017-09-29 | 天津理工大学 | Motor power factor detecting system under the conditions of a kind of non-sinusoidal power supply |
| CN109230871A (en) * | 2018-10-12 | 2019-01-18 | 常州市新创智能科技有限公司 | A kind of phase asynchronous torque motor unwinding driving circuit of induction type and method |
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Application publication date: 20110406 |