CN104378043A - Power saver for three-phase asynchronous motor and power saving method - Google Patents
Power saver for three-phase asynchronous motor and power saving method Download PDFInfo
- Publication number
- CN104378043A CN104378043A CN201410670825.4A CN201410670825A CN104378043A CN 104378043 A CN104378043 A CN 104378043A CN 201410670825 A CN201410670825 A CN 201410670825A CN 104378043 A CN104378043 A CN 104378043A
- Authority
- CN
- China
- Prior art keywords
- processor
- asynchronous machine
- threephase asynchronous
- control circuit
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Control Of Ac Motors In General (AREA)
Abstract
The invention provides a power saver for a three-phase asynchronous motor and a power saving method. The power saver comprises three collecting circuits which correspond to three coils of the three-phase asynchronous motor in a one-to-one mode, three control circuits and a processor. Each collecting circuit is connected with the corresponding coil in series. The three control circuits correspond to the three coils of the three-phase asynchronous motor in a one-to-one mode. Each control circuit is connected with the corresponding coil in series. The input end of the processor is connected with the output ends of the three collecting circuits. The output end of the processor is connected with the input ends of the three control circuits. The processor collects real-time circuit information in the corresponding coils through the collecting circuits. The processor adjusts the voltage and the current of a loop where the corresponding coils are placed under the state that the rotating speed of the three-phase asynchronous motor is not changed according to the real-time circuit information. The power saver can save the power using amount of the three-phase asynchronous motor.
Description
Technical field
The present invention relates to threephase asynchronous machine and relevant electric power system technical field, refer to a kind of electricity-saving appliance for threephase asynchronous machine and a kind of power-saving method especially.
Background technology
In the prior art, threephase asynchronous has set corresponding relevant parameter when dispatching from the factory, in use, threephase asynchronous machine can only operate according to the parameter set when dispatching from the factory, automatically cannot regulate according to load, cause motor still to use higher power operation in the unloaded state, cause the waste of electric power resource.
Summary of the invention
The present invention proposes a kind of operating state according to threephase asynchronous machine and regulates the electricity-saving appliance for threephase asynchronous machine of the voltage of corresponding motor, electric current and a kind of power-saving method in real time.
Technical scheme of the present invention is achieved in that
The invention provides a kind of electricity-saving appliance of threephase asynchronous machine, comprising: three Acquisition Circuit, three coil one_to_one corresponding of three Acquisition Circuit and threephase asynchronous machine, and each Acquisition Circuit connects with corresponding coils connected in series; Three control circuits, three coil one_to_one corresponding of each control circuit and threephase asynchronous machine, each control circuit connects with corresponding coils connected in series; Processor, the input of processor is all connected with the output of three Acquisition Circuit, the output of processor is all connected with the input of three control circuits, wherein, processor gathers the real not time circuit information in corresponding coil by Acquisition Circuit, processor is not changing threephase asynchronous machine and regulate under the state not changing rotating speed voltage, the electric current in loop, corresponding coil place according to real not time circuit information.
Further, between Acquisition Circuit and processor, be provided with the first transformation portion, between processor and control circuit, be provided with the second transformation portion.
Further, first transformation portion comprises the first transformer and the second transformer, first transformer and the second transformer are connected in turn between Acquisition Circuit and processor, second transformation portion comprises the 3rd transformer and the 4th transformer, and the 3rd transformer and the 4th transformer are connected in turn between processor and control circuit.
Further, control circuit is trigger switch.
Further, Acquisition Circuit forms the control circuit corresponding to corresponding coil.
Further, also comprise bidirectional triode thyristor, the direct-connected circuit of bidirectional triode thyristor forms Acquisition Circuit, the circuits for triggering formation control circuit of bidirectional triode thyristor, the input of bidirectional triode thyristor is electrically connected with the input of processor by the first transformation portion, the output of processor is connected with the activated contacts of bidirectional triode thyristor by the second transformation portion, and silicon controlled output is connected with corresponding coil.
Further, processor is single-chip microcomputer.
Present invention also offers a kind of power-saving method, comprise the steps:
S1, each coil of threephase asynchronous machine is connected Acquisition Circuit and control circuit, be connected by processor between Acquisition Circuit and control circuit;
S2, Acquisition Circuit gathers electrical quantity signal in corresponding coil and by electrical quantity signal feedback in processor, and processor goes out driving voltage required for the load of threephase asynchronous machine driven and drive current by electrical quantity calculated signals;
S3, processor sends control signal according to the driving voltage in S2 and drive current to control circuit, and control circuit regulates voltage, the electric current of corresponding coil according to control signal, and the voltage that coil is passed through, electric current are identical with drive current with driving voltage.
Further, electrical quantity signal comprises voltage, electric current, resistance, processor draws the current load condition of threephase asynchronous machine according to the electrical quantity calculated signals of input, and calculates the driving voltage and drive current that drive current threephase asynchronous machine normally to run according to load state.
Further, in step s3, control circuit is by controlling the voltage and current of the on off operating mode control loop in loop, corresponding coil place.
Electricity-saving appliance of the present invention, the monitoring state in corresponding coil is gathered by Acquisition Circuit, by control circuit, the voltage and current in corresponding coil is controlled, threephase asynchronous machine is run with driving voltage and drive current when not changing rotating speed, thus reaches the object of saving electric power.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the flow chart of a kind of power-saving method of the present invention.
What Fig. 2 showed a kind of electricity-saving appliance for threephase asynchronous machine of the present invention and motor coordinates schematic diagram.
Wherein,
10, coil; 20, bidirectional triode thyristor; 30, single-chip microcomputer.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The electricity-saving appliance for threephase asynchronous machine of the present embodiment comprises Acquisition Circuit, processor and control circuit, wherein, Acquisition Circuit and control circuit are three, three coil 10 one_to_one corresponding of three Acquisition Circuit and threephase asynchronous machine, and Acquisition Circuit and corresponding coil 10 are connected.Three coil 10 one_to_one corresponding of three control circuits and threephase asynchronous machine, and control circuit and corresponding coil 10 are connected.Processor is all connected with three Acquisition Circuit and three control circuits, processor obtains the circuit parameter in corresponding coil 10 by Acquisition Circuit, and the driving voltage going out present load according to circuit parameter calculation and drive present load normally to run and drive current, according to result of calculation, processor controls interlock circuit parameter in corresponding coil 10 by control circuit, and the numerical value of the numerical value of the electric current in coil 10 and voltage and minimum voltage and minimum voltage is matched.The electricity-saving appliance of the present embodiment, the monitoring state in corresponding coil 10 is gathered by Acquisition Circuit, by control circuit, the voltage and current in corresponding coil 10 is controlled simultaneously, reduce voltage, the electric current on threephase asynchronous machine, threephase asynchronous machine is run with driving voltage and drive current when not changing rotating speed, thus reaches the object of saving electric power.Driving voltage and drive current are ensure that threephase asynchronous machine normally runs required optimal voltage and optimal electric current.
In the present embodiment, Acquisition Circuit and control circuit are all connected with coil 10, make Acquisition Circuit and control circuit be positioned at same closed-loop path.The circuit parameter of Acquisition Circuit collection is voltage, electric current and resistance parameter in corresponding coil 10.Threephase asynchronous machine is when counter the changing of load, and the velocity of rotation of rotor can change, thus causes the voltage in threephase asynchronous machine, electric current and resistance parameter to change.By the amplitude of variation of more adjacent twice circuit parameter, the change size of load can be extrapolated, thus draw present load.Meanwhile, normal driving voltage and the drive current running threephase asynchronous machine needs under present load can be calculated according to the parameter of load and threephase asynchronous machine self.According to the result of driving voltage and drive current, processor sends control command to control circuit, and under the control of control command, the voltage that control circuit controls corresponding circuit is equal with driving voltage, and the electric current of control corresponding circuit is equal with drive current.In a preferred embodiment, control circuit can be regulated the voltage in loop, electric current by the on off operating mode of control circuit, and namely control circuit leads to change and conduction time of circuit makes circuit produce the voltage and current of different size.
As shown in Figure 2, in wiring, threephase asynchronous machine in the present embodiment needs to coordinate with power distribution cabinet, the input of power distribution cabinet imports three-phase current, the output of power distribution cabinet is six roots of sensation power transmission line, six roots of sensation power transmission line is connected in the wiring section of threephase asynchronous machine, make motor form the startup form of triangle joint?
In the present embodiment, be also provided with bidirectional triode thyristor 20, have separate direct-connected circuit and circuits for triggering in bidirectional triode thyristor 20, wherein, direct-connected circuit forms Acquisition Circuit, circuits for triggering formation control circuit.Use bidirectional triode thyristor 20 that Acquisition Circuit and control circuit can be made to be integrated in parts, simplify the structure of electricity-saving appliance.When selecting bidirectional triode thyristor 20, available bidirectional triode thyristor 20 replaces the brace on threephase asynchronous machine, is namely connected the binding post opposing upper and lower on threephase asynchronous machine by bidirectional triode thyristor 20, realizes triangle joint.In order to realize the regulating action of bidirectional triode thyristor 20, the input of bidirectional triode thyristor 20 is connected respectively with the input of the binding post of upstream with the processor in downstream.The output of processor is connected with the activated contacts of bidirectional triode thyristor, and the output of bidirectional triode thyristor is connected to the corresponding coil in downstream.Be connected with the input of bidirectional triode thyristor 20 by the input of processor is because the direct-connected circuit in bidirectional triode thyristor 20 can be equivalent to a wire, without the device affecting loop, therefore the input of processor directly can be connected with the input of bidirectional triode thyristor 20.Because the voltage in loop is higher, processor cannot adapt to, and is therefore provided with transformation portion in the front-end and back-end of processor.Preferably, between the input and the input of processor of bidirectional triode thyristor 20, be provided with the first transformation portion, between the output and the activated contacts of bidirectional triode thyristor 20 of processor, be provided with the second transformation portion.First transforming portion decompression portion, what it acted on is be the operable low-voltage of processor by the high-voltage variable in coil 10.Correspondingly, the second transformation portion is boosting section, and what it acted on is the low-voltage exported in processor is become the high voltage that bidirectional triode thyristor 20 can carry out action.In the present embodiment, the first transformation portion comprises the first transformer and the second transformer, and wherein, the first transformer preferably adopts magnetic ring transformer, and the second transformer preferably adopts through-type transformer.Adopt magnetic ring transformer can while transformation adjusting inductance, meet the input requirements of processor with the signal strength signal intensity after making a step-down.The signal of telecommunication after a step-down is then finely tuned by through-type transformer, makes the rated voltage of voltage less than or equal to processor of the signal of telecommunication after secondary step-down.3rd transformer and the second transformer coordination through-type transformer, the 4th transformer and the first transformer coordination magnetic ring transformer, the principle of boosting section is identical with the principle of decompression portion.Do not repeat them here.The electricity-saving appliance of the present embodiment, can increase or reduce the quantity of transformer as required voluntarily, and can equally arrange between the number of reducing transformer and the number of stepup transformer, also can unequally arrange.
The control of the make-and-break time of bidirectional triode thyristor 20 pairs of corresponding circuits is the angle of flow realizations by adjusting the angle of flow, and the conduction time of the less then circuit of angle of the angle of flow is longer, and the voltage in corresponding coil 10, electric current are larger; The conduction time of the larger then circuit of angle of the angle of flow is shorter, and the voltage in corresponding coil 10, electric current are less; When the angle of flow is zero, then bidirectional triode thyristor 20 forms conductor, does not carry out opening operation to loop, and applicable threephase asynchronous machine carries out work at rated loads.
For ensureing the normal work of motor, processor in the present embodiment carries out with higher frequency the monitoring of electric current in corresponding coil 10, in a preferred embodiment, each Acquisition Circuit the frequency of 100 times per second can be monitored the electric current in corresponding coil 10 and is delivered in processor, the i.e. collection signal of processor process 300 per second primary current, correspondingly, the connecting and disconnecting of the circuit carrying out 100 times in each control circuit is per second controls, when to ensure the normal operation of threephase asynchronous machine, voltage and current changes in real time with the change of load.In this supply power mode, the frequency of electric current does not change, so the velocity of rotation of threephase asynchronous machine does not also change, namely economize on electricity after threephase asynchronous machine rotating speed with economize on electricity before rotating speed roughly fair, do not affect the work performance of threephase asynchronous machine.
For realizing the calculating controlling functions of processor, processor can select single-chip microcomputer 30 to carry out corresponding program editing, and preferably, the model of single-chip microcomputer 30 can complete functional processor jointly for 580u-epm7032s-plcc and at89c51.
Under the effect of electricity-saving appliance, voltage on threephase asynchronous machine, the reduction of electric current cause the caloric value of threephase asynchronous machine to decline to some extent, namely the idle work part of threephase asynchronous machine reduces, and improves the transformation efficiency of threephase asynchronous machine, makes threephase asynchronous machine play the effect of energy-conserving and environment-protective.
For convenience of the use of electricity-saving appliance, multiple Acquisition Circuit, multiple control circuit and processor can be joined together to form an entirety in advance, in use, the corresponding binding post respective terminal of entirety being connected to threephase asynchronous machine can complete installation, make the use of electricity-saving appliance efficient and convenient.It should be noted that the electricity-saving appliance in the present embodiment is connected to after on threephase asynchronous machine, need to carry out soft start to threephase asynchronous machine, to make ascending the increasing gradually of the electric current in coil 10.
For verifying actual performance and the effect of electricity-saving appliance, applicant has also carried out a contrast test.In contrast test, self-adjusting system in the present embodiment is installed in a threephase asynchronous machine driving escalator up to run, record following data: before installing when elevator no-load or carrying, the phase voltage of threephase asynchronous machine all remains on about 385V, and phase current all remains on about 6.8A; After installing after electricity-saving appliance, during elevator no-load, the phase voltage of threephase asynchronous machine all remains on about 196V, and phase current all remains on about 4.1A; Elevator is (undercapacity) when carrying, and phase voltage is between 196V to 251V, and phase current is between 4.1 to 5.4, and the intensity of variation of phase voltage and phase current becomes large with the quantity increase of passenger.Can be found out by above-mentioned corresponding data, the self-adjusting system of the present embodiment can reduce threephase asynchronous machine voltage and current operationally effectively, saves power cost.Simultaneously, threephase asynchronous machine has lower caloric value when low-voltage and low current, namely threephase asynchronous machine has lower idle work loss, threephase asynchronous machine is made to be useful work by more electric energy conversion, improve motor service efficiency under a low load, and the useful life of threephase asynchronous machine can be extended.
Present invention also offers a kind of method of power-saving method, as shown in Figure 1, comprise the steps:
S1, each coil of threephase asynchronous machine is all connected in series Acquisition Circuit and control circuit, and is connected by processor between Acquisition Circuit and control circuit;
S2, Acquisition Circuit gathers electrical quantity signal in corresponding coil and by electrical quantity signal feedback in processor, and processor goes out driving voltage required for the load of threephase asynchronous machine driven and drive current by electrical quantity calculated signals;
S3, processor sends control signal according to the driving voltage in S2 and drive current to control circuit, and control circuit adjusts the voltage, the electric current that increase corresponding coil according to control signal, the voltage that coil is passed through, electric current are identical with drive current with driving voltage.
In a first step, driving voltage and drive current are ensure that threephase asynchronous machine normally runs required optimal voltage and optimal electric current.
In second step, electrical quantity signal comprises the parameters such as voltage, electric current and resistance, when the load, electrical quantity signal in threephase asynchronous machine can change, according to the situation of change of current parameters, processor can calculate the situation of change of present load and current motor run well required for driving voltage and drive current.
In the third step, the control of control circuit to the electric current in circuit, voltage is realized by the on off operating mode of control place circuit.Within the unit interval, the time of energising is longer, and the voltage and current in loop is larger, and the time of energising is shorter, and the voltage and current in loop is less.For ensureing the normal operation of threephase asynchronous machine, the on off operating mode change of circuit should change in units of microsecond.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. for an electricity-saving appliance for threephase asynchronous machine, it is characterized in that, comprising:
Three Acquisition Circuit, three coil one_to_one corresponding of described three Acquisition Circuit and threephase asynchronous machine, and each described Acquisition Circuit connects with corresponding described coils connected in series;
Three control circuits, three coil one_to_one corresponding of each described control circuit and described threephase asynchronous machine, each described control circuit connects with corresponding described coils connected in series;
Processor, the input of described processor is all connected with the output of three described Acquisition Circuit, and the output of described processor is all connected with the input of three described control circuits,
Wherein, described processor gathers the real not time circuit information in corresponding coil by described Acquisition Circuit, described processor is not changing described threephase asynchronous machine and regulate under the state not changing rotating speed voltage, the electric current in loop, corresponding coil place according to real not time circuit information.
2. a kind of electricity-saving appliance for threephase asynchronous machine according to claim 1, is characterized in that, is provided with the first transformation portion between described Acquisition Circuit and described processor, is provided with the second transformation portion between described processor and described control circuit.
3. a kind of electricity-saving appliance for threephase asynchronous machine according to claim 2, it is characterized in that, described first transformation portion comprises the first transformer and the second transformer, described first transformer and described second transformer are connected in turn between described Acquisition Circuit and described processor, described second transformation portion comprises the 3rd transformer and the 4th transformer, and described 3rd transformer and described 4th transformer are connected in turn between described processor and described control circuit.
4. a kind of electricity-saving appliance for threephase asynchronous machine according to claim 1, is characterized in that, described control circuit is trigger switch.
5. a kind of electricity-saving appliance for threephase asynchronous machine according to claim 2, is characterized in that, described Acquisition Circuit forms the described control circuit corresponding to corresponding coil.
6. a kind of electricity-saving appliance for threephase asynchronous machine according to claim 5, it is characterized in that, also comprise bidirectional triode thyristor, the direct-connected circuit of described bidirectional triode thyristor forms described Acquisition Circuit, the circuits for triggering of described bidirectional triode thyristor form described control circuit, the input of described bidirectional triode thyristor is electrically connected with the input of described processor by described first transformation portion, the output of described processor is connected with the activated contacts of described bidirectional triode thyristor by described second transformation portion, and described silicon controlled output is connected with corresponding described coil.
7. a kind of electricity-saving appliance for threephase asynchronous machine according to claim 1, is characterized in that, described processor is single-chip microcomputer.
8. a power-saving method, is characterized in that, comprises the steps:
S1, each coil of threephase asynchronous machine is connected Acquisition Circuit and control circuit, be connected by processor between described Acquisition Circuit and described control circuit;
S2, described Acquisition Circuit gathers electrical quantity signal in corresponding coil and by electrical quantity signal feedback in described processor, and described processor goes out driving voltage required for the load of threephase asynchronous machine driven and drive current by described electrical quantity calculated signals;
S3, described processor sends control signal according to the driving voltage in S2 and drive current to described control circuit, described control circuit regulates voltage, the electric current of corresponding coil according to described control signal, and the voltage that coil is passed through, electric current are identical with described drive current with described driving voltage.
9. a kind of power-saving method according to claim 8, it is characterized in that, described electrical quantity signal comprises voltage, electric current, resistance, described processor draws the current load condition of described threephase asynchronous machine according to the electrical quantity calculated signals of input, and calculates the driving voltage and drive current that drive current described threephase asynchronous machine normally to run according to load state.
10. a kind of power-saving method according to claim 8, is characterized in that, in step s3, described control circuit controls the voltage and current in described loop by the on off operating mode controlling loop, corresponding coil place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410670825.4A CN104378043B (en) | 2014-11-21 | 2014-11-21 | A kind of electricity-saving appliance and a kind of power-saving method for threephase asynchronous machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410670825.4A CN104378043B (en) | 2014-11-21 | 2014-11-21 | A kind of electricity-saving appliance and a kind of power-saving method for threephase asynchronous machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104378043A true CN104378043A (en) | 2015-02-25 |
| CN104378043B CN104378043B (en) | 2019-08-13 |
Family
ID=52556753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410670825.4A Expired - Fee Related CN104378043B (en) | 2014-11-21 | 2014-11-21 | A kind of electricity-saving appliance and a kind of power-saving method for threephase asynchronous machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104378043B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113746400A (en) * | 2021-08-18 | 2021-12-03 | 智乐科技发展有限公司 | Adjusting circuit for normal operation of motor in medium-high frequency environment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101207352A (en) * | 2007-11-21 | 2008-06-25 | 华北电力大学 | Control method and control device of power supply soft launch for intermittent power supply by balance beam type pumping unit |
| CN201207633Y (en) * | 2008-05-22 | 2009-03-11 | 北京富利宝系统集成有限公司 | Power saving device for AC three phase asynchronous motor |
| CN202475361U (en) * | 2012-03-21 | 2012-10-03 | 朱吕松 | Intelligent motor economizer |
| CN202513872U (en) * | 2012-04-28 | 2012-10-31 | 湖南固迅节能科技有限公司 | Device for adapting motor to automatically run at optimum efficiency in on-line type |
| CN204231253U (en) * | 2014-11-21 | 2015-03-25 | 北京通恒领航节能科技有限公司 | A kind of electricity-saving appliance for threephase asynchronous machine |
-
2014
- 2014-11-21 CN CN201410670825.4A patent/CN104378043B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101207352A (en) * | 2007-11-21 | 2008-06-25 | 华北电力大学 | Control method and control device of power supply soft launch for intermittent power supply by balance beam type pumping unit |
| CN201207633Y (en) * | 2008-05-22 | 2009-03-11 | 北京富利宝系统集成有限公司 | Power saving device for AC three phase asynchronous motor |
| CN202475361U (en) * | 2012-03-21 | 2012-10-03 | 朱吕松 | Intelligent motor economizer |
| CN202513872U (en) * | 2012-04-28 | 2012-10-31 | 湖南固迅节能科技有限公司 | Device for adapting motor to automatically run at optimum efficiency in on-line type |
| CN204231253U (en) * | 2014-11-21 | 2015-03-25 | 北京通恒领航节能科技有限公司 | A kind of electricity-saving appliance for threephase asynchronous machine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113746400A (en) * | 2021-08-18 | 2021-12-03 | 智乐科技发展有限公司 | Adjusting circuit for normal operation of motor in medium-high frequency environment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104378043B (en) | 2019-08-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100411296C (en) | Instantaneous power cut restaring method and apparatus for frequency change speed regulating system | |
| CN102447265B (en) | Loading device and method for power unit with feedback function | |
| CN103399228A (en) | Total power aging test circuit for current transformer or frequency transformer | |
| CN102916640B (en) | A kind of diesel locomotive phase-control excitation control device and method thereof | |
| CN104242738B (en) | Frequency conversion and energy saving control device and method for cluster well pumping units | |
| CN102916627B (en) | Variable frequency starting method and device and storage battery supply | |
| CN103427729A (en) | Rod pumped well group control system based on direct current bus | |
| CN201226505Y (en) | High voltage blower/high voltage fan electricity-saving device | |
| CN107276381A (en) | High voltage converter pre-charging device and charging method based on electric power electric transformer | |
| CN105044411A (en) | Power module current flux test platform with load current including DC component | |
| CN204231253U (en) | A kind of electricity-saving appliance for threephase asynchronous machine | |
| CN103868192B (en) | A kind of energy-saving control cabinet suitable in central air conditioner system water pump | |
| CN104400186B (en) | Tandem type welder power topological structure | |
| CN104378043A (en) | Power saver for three-phase asynchronous motor and power saving method | |
| CN201690400U (en) | Frequency-conversion soft-start hybrid power cabinet | |
| CN203645586U (en) | Integration system of oil well heating and intelligent control of clustered-well oil pumping units | |
| CN204244087U (en) | A kind of motor test electric supply installation with transformer and filter | |
| CN105207555A (en) | Digital type electric generator automatic regulation system and method thereof | |
| CN202564971U (en) | Energy regeneration system of frequency converter aging test link | |
| CN202231603U (en) | Frequency converter | |
| CN107733314A (en) | A kind of electricity-saving appliance for threephase asynchronous machine | |
| CN208890693U (en) | New Low Voltage energy saving motor control cabinet | |
| CN101741305A (en) | Controller of energy-saving and noise reduction digital generator | |
| CN104836402A (en) | Automatic-excitation IGBT exciter | |
| CN210745713U (en) | Intelligent control cabinet of oil field pumping unit system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20151202 Address after: 100000, Beijing, Zhongguancun Tongzhou District science and Technology Park, Tongzhou Park Jinqiao technology industry base, King Sheng, two South 12 street, building 1, Room 301, room three Applicant after: Beijing wisdom Technology Co., Ltd. Address before: 102208 Beijing City, Changping District small town garden building 10 crown 2 layer 2-B-1 Applicant before: BEIJING TONGHENGLINGHANG ENERGY SAVING TECHNOLOGY CO., LTD. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190813 Termination date: 20201121 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |