CN101309065A - Electricity-saving controller for electric motor - Google Patents
Electricity-saving controller for electric motor Download PDFInfo
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- CN101309065A CN101309065A CNA2007100146569A CN200710014656A CN101309065A CN 101309065 A CN101309065 A CN 101309065A CN A2007100146569 A CNA2007100146569 A CN A2007100146569A CN 200710014656 A CN200710014656 A CN 200710014656A CN 101309065 A CN101309065 A CN 101309065A
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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Abstract
The invention relates to a motor energy-saving controller which belongs to the energy-saving controller technology field and is characterized in that the signal output terminals of a protection unit are respectively connected with the signal input terminals of a reference unit, a voltage detecting unit and an execution unit; the signal output terminal of the execution unit is connected with the input terminal of a signal detecting unit; the voltage detecting unit is connected with the two ends of the execution unit in parallel; the output terminals of the voltage detecting unit, the reference unit, the signal detecting unit, and an adjusting and setting unit are respectively connected with the input terminals of a comparing control unit whose output terminals are respectively connected with the execution unit and an alarm system. The motor energy-saving controller of the invention can replace traditional contactor, can automatically adjust the input voltage according to the load and makes the working current of the motor be close to or equal to the rating current, thereby making the motor be kept at the best running status with maximum efficiency.
Description
One, technical field
The present invention relates to a kind of electricity-saving controller for electric motor, belong to the electricity-saving controller technical field.
Two, background technology
At present, the energy-saving scheme of existing motor all compares generally, and function singleness, versatility is too poor in practical operation, difficulty is bigger, and also all the clear and definite data of neither one illustrate motor can reach energy-conservation optimization under what state, thereby make suitability for industrialized production bring certain difficulty.
Three, summary of the invention
The objective of the invention is to solve the weak point that above-mentioned prior art scheme exists, provide a kind of and can replace traditional contactor, can regulate the input voltage size automatically according to the size of load, and make the motor operating current near or equal rated current, make motor remain on the optimum state operation, reach maximizing efficiency, and can adjust the electricity-saving controller for electric motor of start-up time.
Can keep the lowest power of electrical motors, just can realize energy-conservation to rated revolution.And to change power of electric motor, can change realizations such as voltage, frequency.Consider economy, efficient, the factor of energy-conservation three aspects has only the minimum voltage of motor under rated current to be only energy-conservation first-selection.
The present invention is achieved by the following technical solutions:
A kind of electricity-saving controller for electric motor of the present invention, the operating current of motor is reached or near rated current (or a set point), reach purpose of energy saving by the operating voltage that changes motor, its special character is to include power supply, reference cell, protected location, voltage detection unit, compare control unit, performance element, adjust setup unit, detecting signal unit and warning system, the signal output part of protected location connects reference cell respectively, the signal input part of voltage detection unit and performance element, the signal output part of performance element is connected with the input of detecting signal unit, voltage detection unit is connected in parallel on the two ends of performance element, voltage detection unit, reference cell, detecting signal unit, the output of adjusting setup unit connects the input of comparison control unit respectively, and relatively control unit output connects performance element and warning system respectively;
Described detecting signal unit is that the real-time current voltage signal to motor carries out the monitored signal detector, and data are delivered to the comparison control unit, detected signal can be the current changing signal that causes owing to load variations, also can be owing to voltage change signal that load variations causes, revolution variable signal, vector variable signal, moment variations signal etc.;
Described relatively control unit is to receive coupled detecting signal unit, adjust data that setup unit, voltage detection unit and reference cell transmitted, and data of receiving are carried out analysis-by-synthesis relatively and the central controller that calculates, its output control execution unit and alarm unit operate as normal;
Described voltage detection unit is that the voltage to the performance element two ends carries out real-time monitored signal detector, and data are connected is transported to the comparison control unit;
Described protected location is as short-circuit protection, and the protector of surge protection or other protection that needs adopts realizations such as fuse; Reference cell provides to the dc supply of system and three-phase reference power supply; Alarm unit is the alarm that is used to provide sound and light alarm or the warning of other form;
Described performance element is to adopt bidirectional triode thyristor or other switch element to constitute, and receives the relatively actuator of the signal of control unit;
Described adjustment setup unit is the adjuster that is linked to each other with control unit relatively, system is adjusted and sets by control panel by output;
The overload protection of described load can be to set point of electric current; realize by the input and output voltage variation that detects performance element; perhaps set a magnitude of voltage, realize by the variation that detects electric current, perhaps by power of electric motor is set and controlled and realize.
A kind of electricity-saving controller for electric motor of the present invention after the energized, can adopt different start-up mode according to the residing different conditions of load, if motor is in zero load or light condition, can select normal start-up mode; If motor is in heavy condition, can select full voltage starting, after startup is finished, change power save mode automatically over to; If net capacity can not satisfy the full voltage starting of motor, can select current-limited startup state (can set starting current or voltage limiting mode) by the multiple of rated current, after startup is finished, change power save mode automatically over to.
Electricity-saving controller for electric motor of the present invention can replace traditional contactor, can regulate the input voltage size automatically according to the size of load, and make the motor operating current near or equal rated current, reach purpose of energy saving by the operating voltage that changes motor, can keep the lowest power of electrical motors to rated revolution, make motor remain on the optimum state operation, reach maximizing efficiency.
Four, description of drawings
Fig. 1: structural principle of the present invention connects block diagram.
Five, embodiment
With reference to figure 1, electricity-saving controller for electric motor of the present invention is described in detail.
A kind of electricity-saving controller for electric motor, the operating current of motor is reached or near rated current (or a set point), reach purpose of energy saving by the operating voltage that changes motor, include power supply, reference cell, protected location, voltage detection unit, compare control unit, performance element, adjust setup unit, detecting signal unit and warning system, the signal output part of protected location connects reference cell respectively, the signal input part of voltage detection unit and performance element, the signal output part of performance element is connected with the input of detecting signal unit, voltage detection unit is connected in parallel on the two ends of performance element, detect its both end voltage in real time, voltage detection unit, reference cell, detecting signal unit, the output of adjusting setup unit connects the input of comparison control unit respectively, and relatively control unit output connects performance element and warning system respectively;
Energized, motor starts under start-up mode.After startup is finished, relatively control unit compares current value and the set point (rated current of motor or other set points) that detecting signal unit monitors, when the operating current of motor during less than (or greater than) set point, then export a signal and go control execution unit, the operating voltage of motor is descended (or rising), the operating current of motor thereupon rise (or descend), until the operating current of motor equals or during near set point (or near scope the set point), then system keeps a stable voltage output, makes the operating current of motor approach rated current (or other set points) all the time.
This controller moves according to abnormal conditions control execution unit such as detected overload, overvoltage, imbalance, electric leakage, phase sequences; take safeguard measure, realize functions such as overload protection, overvoltage protection, imbalance (containing phase shortage) protection, earth leakage protective, phase sequence.
(1) overload protection: when load strengthens; if the operating current of motor surpasses set point; system is approaching or equal for the operating current and the set point that guarantee motor; the input voltage of the automatic rising motor of meeting is to reduce electric current; but when voltage detection unit monitors the voltage equal (or approaching) at performance element two ends, will export a signal to comparing control unit:
1, in the scope that system allows, can set current value arbitrarily, when the electric current that detecting signal unit detects surpasses a certain set point, relatively control unit will be exported a signal and give alarm unit, thereby reminds the operator to note (can establish 1 or several alarm point as required).
2, rise when the electric current continuation, when surpassing another value of set point, relatively control unit will be exported a stop signal, makes performance element disconnection motor power, plays the purpose of overload protection.
(2) short-circuit protection: adopt fast acting fuse or other safeguard measures.
(3) unbalance protection: relatively control unit compares the three-phase current that detecting signal unit detects; when monitoring the three-phase current unbalance degree when reaching a certain set point; relatively control unit will be exported a stop signal; make performance element disconnect motor power, reach the purpose of protection.Relatively signal of control unit output reminds the operator to note to alarm unit simultaneously.
(4) overvoltage protection: relatively control unit compares the three-phase input voltage of voltage detection unit detection and the reference voltage in the reference cell; when system's input voltage that voltage detection unit detects surpasses a certain value of the reference voltage in the reference cell (in the scope of system's permission, can set arbitrarily); relatively control unit will be exported a stop signal; make performance element disconnect motor power, reach the purpose of protection.Relatively signal of control unit output reminds the operator to note to alarm unit simultaneously.
(5) earth leakage protective: relatively control unit carries out vector calculating to the three-phase current of detecting signal unit detection; when if its numerical value surpasses a certain value (in the scope of system's permission, can set arbitrarily); relatively control unit will be exported a stop signal; make performance element disconnect motor power, reach the purpose of protection.Relatively signal of control unit output reminds the operator to note to alarm unit simultaneously.
(6) phase sequence: relatively control unit compares the phase sequence of the three-phase input voltage of voltage detection unit detection and the phase sequence of the reference voltage in the reference cell; when the phase sequence of the system's input voltage that detects when voltage detection unit and the phase sequence of the reference voltage in the reference cell are inconsistent; relatively control unit will be exported a stop signal; make performance element disconnect motor power, reach the purpose of protection.Relatively signal of control unit output reminds the operator to note to alarm unit simultaneously.Each unit of present embodiment all can adopt existing various prior art to realize.
A kind of electricity-saving controller for electric motor of present embodiment, the operating current of motor is reached or near rated current (or a set point), reach purpose of energy saving by the operating voltage that changes motor, can keep the lowest power of electrical motors to rated revolution.
Claims (7)
1; a kind of electricity-saving controller for electric motor; it is characterized in that including power supply; reference cell; protected location; voltage detection unit; compare control unit; performance element; adjust setup unit; detecting signal unit and warning system; the signal output part of protected location connects reference cell respectively; the signal input part of voltage detection unit and performance element; the signal output part of performance element is connected with the input of detecting signal unit; voltage detection unit is connected in parallel on the two ends of performance element; voltage detection unit; reference cell; detecting signal unit; the output of adjusting setup unit connects the input of comparison control unit respectively, and relatively control unit output connects performance element and warning system respectively.
2, according to the described a kind of electricity-saving controller for electric motor of claim 1, it is characterized in that described detecting signal unit is that real-time current voltage signal to motor carries out the monitored signal detector, and data are delivered to the comparison control unit, detected signal can be the current changing signal that causes owing to load variations, also can be owing to voltage change signal that load variations causes, revolution variable signal, vector variable signal, moment variations signal etc.
3, according to the described a kind of electricity-saving controller for electric motor of claim 1, it is characterized in that described relatively control unit is to receive coupled detecting signal unit, adjust data that setup unit, voltage detection unit and reference cell transmitted, and data of receiving are carried out analysis-by-synthesis relatively and the central controller that calculates, its output control execution unit and alarm unit operate as normal.
4,, it is characterized in that described voltage detection unit is that voltage to the performance element two ends carries out real-time monitored signal detector, and data are connected be transported to the comparison control unit according to the described a kind of electricity-saving controller for electric motor of claim 1.
5, according to the described a kind of electricity-saving controller for electric motor of claim 1, it is characterized in that described protected location is as short-circuit protection, the protector of surge protection or other protection that needs adopts realizations such as fuse; Reference cell provides to the dc supply of system and three-phase reference power supply; Alarm unit is the alarm that is used to provide sound and light alarm or the warning of other form.
6,, it is characterized in that performance element is to adopt bidirectional triode thyristor or other switch element to constitute, and receives the relatively actuator of the signal of control unit according to the described a kind of electricity-saving controller for electric motor of claim 1.
7,, it is characterized in that described adjustment setup unit is the adjuster that is linked to each other with control unit relatively, system is adjusted and sets by control panel by output according to the described a kind of electricity-saving controller for electric motor of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100146569A CN101309065A (en) | 2007-05-19 | 2007-05-19 | Electricity-saving controller for electric motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100146569A CN101309065A (en) | 2007-05-19 | 2007-05-19 | Electricity-saving controller for electric motor |
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| Publication Number | Publication Date |
|---|---|
| CN101309065A true CN101309065A (en) | 2008-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2007100146569A Pending CN101309065A (en) | 2007-05-19 | 2007-05-19 | Electricity-saving controller for electric motor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104375427A (en) * | 2014-10-20 | 2015-02-25 | 中山顺富节能科技有限公司 | Multi-functional electricity-saving controller simple in structure |
| CN110572101A (en) * | 2019-09-25 | 2019-12-13 | 潍柴动力股份有限公司 | three-phase alternating current motor phase sequence checking method and system |
-
2007
- 2007-05-19 CN CNA2007100146569A patent/CN101309065A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104375427A (en) * | 2014-10-20 | 2015-02-25 | 中山顺富节能科技有限公司 | Multi-functional electricity-saving controller simple in structure |
| CN110572101A (en) * | 2019-09-25 | 2019-12-13 | 潍柴动力股份有限公司 | three-phase alternating current motor phase sequence checking method and system |
| CN110572101B (en) * | 2019-09-25 | 2021-06-22 | 潍柴动力股份有限公司 | Three-phase alternating current motor phase sequence checking method and system |
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Open date: 20081119 |