CN103001575A - Single-phase motor speed regulation device and flue-cured tobacco equipment - Google Patents
Single-phase motor speed regulation device and flue-cured tobacco equipment Download PDFInfo
- Publication number
- CN103001575A CN103001575A CN2013100062639A CN201310006263A CN103001575A CN 103001575 A CN103001575 A CN 103001575A CN 2013100062639 A CN2013100062639 A CN 2013100062639A CN 201310006263 A CN201310006263 A CN 201310006263A CN 103001575 A CN103001575 A CN 103001575A
- Authority
- CN
- China
- Prior art keywords
- power source
- phase motor
- controller
- main power
- alternating current
- 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.)
- Pending
Links
Images
Classifications
-
- 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
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Control Of Multiple Motors (AREA)
Abstract
The invention relates to a single-phase motor speed regulation device. The single-phase motor speed regulation device comprises an alternating current input end, a main power source variable frequency inverter, a communication control module, an alternating current bypass selecting switch, a controller, a control panel and an output control switch. The control panel is connected with the alternating current input end and the controller and used for setting rotation speed, and the controller receives set rotation speed from the control panel. When the set rotation speed is a first rotation speed, the controller controls alternating current from the alternating current input end to directly pass the alternating current bypass selecting switch and then output by the output control switch, and simultaneously controls the main power source variable frequency inverter to stop working. When the set rotation speed is a second rotation speed smaller than the first rotation speed, the controller controls the main power source variable frequency inverter according to the set rotation speed to enable alternating current from the alternating current input end to pass the main power source variable frequency inverter and output by the output control switch. The single-phase motor speed regulation device and flue-cured tobacco equipment can achieve multistage speed regulation, adjusts air quantity of an air fan according to requirements during tobacco baking, and improves tobacco baking quality.
Description
Technical field
The present invention relates to the electric machine speed regulation field, particularly relate to a kind of speed regulator of single-phase motor device and flue-cured tobacco equipment.
Background technology
The main air blower that flue-cured tobacco intensive baking room of the prior art adopts mostly is greatly single-phase single blower fan structure, and motor that this main air blower uses is the single-phase 220V alternating current machine of condenser type of 1.5KW or 2.2KW, motor pole number 4 utmost points, 1440 rev/mins of rated speeds.
Main air blower can't be finished speed in whole tobacco leaf baking process and regulate in case start, and particularly when the less air quantity of needs, can't provide less air quantity, therefore can cause the quality of tobacco leaf baking can not reach satisfied requirement.
Adopt the barn of this main air blower probably to have 250,000 in the whole nation, if main air blower is replaced with double-speed motor or multispeed electric machine, cost and difficulty of construction are all larger.Therefore, be badly in need of a kind of one-way motors speed regulating device in the prior art, so as with main air blower in the prior art can't speed governing problem, thereby be beneficial to the adjusting fan delivery, guarantee tobacco leaf baking quality, realize that the tobacco grower increases income.
Summary of the invention
The purpose of this invention is to provide a kind of blower fan of can realizing and between various rotating speed, switch arbitrarily, make the tobacco grower can regulate as required fan delivery in the tobacco leaf cook stages, improved speed regulator of single-phase motor device and the flue-cured tobacco equipment of tobacco leaf baking quality.
For solving the problems of the technologies described above, as first aspect of the present invention, a kind of speed regulator of single-phase motor device is provided, has comprised: ac input end, main power source variable frequency inverter, control communication module, alternating current bypass selector switch, controller, control panel and output control switch; Control panel is connected with controller with ac input end, is used for setting rotating speed, and controller receives the setting rotating speed from control panel; When the setting rotating speed was the first rotating speed, controller control was directly exported by output control switch behind the process alternating current bypass selector switch from the alternating current of ac input end, controls simultaneously the main power source variable frequency inverter and quits work; When to set rotating speed be the second rotating speed less than the first rotating speed, controller was according to setting frequently inverter of rotating speed control main transformer, so that exported by output control switch behind main transformer frequency inverter from the alternating current of ac input end.
Further; the speed regulator of single-phase motor device also comprises: the overvoltage/undervoltage detecting unit; be electrically connected with controller; be used for sending the overvoltage/undervoltage guard signal to controller when detecting line voltage and surpass predetermined scope, controller receives and directly uses behind the overvoltage/undervoltage guard signal from the output as output control switch of the alternating current of ac input end.
Further, the monophase machine adjusting device also comprises auxiliary EMC filter and auxiliary rectifier filter, ac input end is connected with the control communication module with the auxiliary rectifier filter by auxiliary EMC filter successively, and the overvoltage/undervoltage detecting unit is connected with auxiliary EMC filter.
Further; the speed regulator of single-phase motor device also comprises: current detection module; be connected with controller with the main power source variable frequency inverter; be used for sending the overcurrent protection signal to controller when detecting main power source frequency converter overcurrent, controller receives and directly uses behind the overcurrent protection signal from the output as output control switch of the alternating current of ac input end.
Further, the monophase machine adjusting device also comprises main EMC filter and main rectifier filter, ac input end successively by main EMC filter be connected rectifier filter and be connected with the main power source variable frequency inverter.
Further, the monophase machine adjusting device also comprises: variable frequency drive unit, controller is by variable frequency drive unit control main power source variable frequency inverter.
Further, the monophase machine adjusting device also comprises: the main power source output filter, the main power source variable frequency inverter is connected with output control switch by the main power source output filter.
Further, the monophase machine adjusting device also comprises: the Voltage Feedback module, and its output is connected with the main power source output filter, and its output is connected with controller.
As second aspect of the present invention, a kind of flue-cured tobacco equipment is provided, comprise monophase machine, also comprise for the speed regulating device that monophase machine carried out speed governing, speed regulating device are above-mentioned speed regulator of single-phase motor devices.
The present invention develops for the single-phase capacitance formula electric machine speed regulation that solves 1.5KW or the following power of 2.2KW, can realize the multistep speed regulation of such motor, it can realize that the blower motor rotating speed switches arbitrarily between 960 rev/mins, 1020 rev/mins, 1080 rev/mins, 1140 rev/mins, 1440 rev/mins, the tobacco grower can regulate fan delivery as required in the tobacco leaf cook stages, has improved tobacco leaf baking quality.
Description of drawings
Fig. 1 has schematically shown the schematic diagram of the speed regulator of single-phase motor device among the present invention.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
As a first aspect of the present invention, a kind of speed regulator of single-phase motor device is provided, especially, can be applicable in the flue-cured tobacco equipment, so that for the single-phase blower fan of flue-cured tobacco equipment provides speed-regulating function, solving it can't speed governing, causes flue-cured tobacco in leaf baking process, because less air quantity can't be provided, cause the problem of the quality of tobacco leaf baking.
As shown in Figure 1, this speed regulator of single-phase motor device comprises: ac input end, main power source variable frequency inverter, control communication module, alternating current bypass selector switch, controller, control panel and output control switch; Control panel is connected with controller with ac input end, is used for setting rotating speed, and controller receives the setting rotating speed from control panel; When the setting rotating speed was the first rotating speed (being fast mode), controller control was directly exported by output control switch behind the process alternating current bypass selector switch from the alternating current of ac input end, controls simultaneously the main power source variable frequency inverter and quits work; When setting rotating speed for less than second rotating speed (being low-speed mode) of the first rotating speed the time, controller is according to setting frequently inverter of rotating speed control main transformer, so that frequently exported by output control switch behind the inverter through main transformer from the alternating current of ac input end.
Wherein, control panel can be used for arranging the time of rotating speed and the operation of record height, the time of namely recording fast high low speed flue-cured tobacco.The control communication module sends to controller with the parameter that arranges in the control panel, finishes and the communicating by letter of controller, and carries out the order of self-controller.The main power source variable frequency inverter is used for direct current signal is become the alternating-current pulse signal by SPWM.Ac input end can provide power supply to controller, control panel, control communication module, blower fan etc.The main power source variable frequency inverter is exported the SPWM of the corresponding frequency of frequency of setting with control panel, and its output voltage is fed back to controller, so that controller is controlled its normal work.. the alternating current bypass selector switch is used for when equipment has protection or fault-signal, automatically runs to bypass output.Output control unit is used for carrying out the switching of high low-speed mode, to the blower fan off-load.
Preferably, the control communication module receives the instruction of controller, can opening or closing according to this instruction control output control switch and alternating current bypass selector switch.
Like this, when flue-cured tobacco equipment need to run to fast mode, the main power source variable frequency inverter is not worked, and the alternating current of ac input end input makes the blower fan on-line operation in civil power power frequency pattern by alternating current bypass selector switch and the direct fan power supply of output control switch.When flue-cured tobacco equipment need to run to low-speed mode, the work of main power source variable frequency inverter, frequency and voltage that controller is set according to control panel are powered by the output control switch fan, make blower fan directly set the rotating speed pattern.
Preferably; the speed regulator of single-phase motor device also comprises: the overvoltage/undervoltage detecting unit; be electrically connected with controller; be used for sending the overvoltage/undervoltage guard signal to controller when detecting line voltage and surpass predetermined scope, controller receives and directly uses behind the overvoltage/undervoltage guard signal from the output as output control switch of the alternating current of ac input end.
Preferably, the monophase machine adjusting device also comprises auxiliary EMC filter and auxiliary rectifier filter, ac input end is connected with the control communication module with the auxiliary rectifier filter by auxiliary EMC filter successively, and the overvoltage/undervoltage detecting unit is connected with auxiliary EMC filter.Wherein, the auxiliary rectifier filter is used for interchange is become direct current.
Preferably, the monophase machine adjusting device also comprises: variable frequency drive unit, controller is by variable frequency drive unit control main power source variable frequency inverter.Variable frequency drive unit drives IGBT or the MOSFET of full-bridge, in order to carry out the isolation of high pressure and control power supply.
Preferably; the speed regulator of single-phase motor device also comprises: current detection module; be connected with controller with the main power source variable frequency inverter; be used for sending the overcurrent protection signal to controller when detecting main power source frequency converter overcurrent, controller receives and directly uses behind the overcurrent protection signal from the output as output control switch of the alternating current of ac input end.Current detection module is for detection of the current signal of above-mentioned IGBT or MOSFET.
That is to say, when under low-speed mode, when detecting overvoltage/undervoltage guard signal, overcurrent protection signal, all can automatically switch to fast mode.In addition, when controller detects output fault-signal, temperature overheating signal, also can be directly switch to fast mode.
Preferably, the monophase machine adjusting device also comprises main EMC filter and main rectifier filter, ac input end successively by main EMC filter be connected rectifier filter and be connected with the main power source variable frequency inverter.Main EMC filter can prevent speed regulator when work, to the pollution of electrical network with disturb other equipment.Main rectifier filter is used for interchange is become pure direct current.The applicant finds, for reducing fan temperature rise, prolongs service life of fan, and the power-supply device output harmonic wave of necessary fan power supply is little, and therefore, the present invention adopts pure sine wave output respective frequencies and voltage at the output of main power source variable frequency inverter.By contrast, frequency converter of the prior art mainly is for the three-phase blower fan, and utilization can cause fan temperature rise seriously to raise under single-phase blower fan, affects service life of fan.
Preferably, the monophase machine adjusting device also comprises: the main power source output filter, the main power source variable frequency inverter is connected with output control switch by the main power source output filter.The main power source output filter is used for the SPWM waveform is become pure sine wave.
Preferably, the monophase machine adjusting device also comprises: the Voltage Feedback module, and its output is connected with the main power source output filter, and its output is connected with controller, is used for carrying out closed-loop control, makes the stable output of main power source variable frequency inverter.
Preferably, according to the power of fan size requirements, the speed regulator of single-phase motor device among the present invention provides two types: 1.5KW and 2.2KW.
Speed regulator of single-phase motor device among the present invention has following characteristics:
(1) the main power source variable frequency inverter adopts the SPWM technology of microprocessor control, pure sine wave output, and waveform is pure.
(2) exclusive dynamic current ring control technology is guaranteed main power source variable frequency inverter reliability service.
(3) the adaptive load ability is strong, comprises capacitive character, inductive, Combination load.
(4) overload capacity and strong shock resistance.
(5) has the input over voltage, output over voltage, the perfect defencive functions such as overload.
(6) the main power source variable frequency inverter adopts LED indication charactron to show motor speed and running time, and state is very clear.
(7) freely switch, realize that high low-speed mode changes.
(8) can realize Long-distance Control (the inner socket of reserving)
Especially, the key technical indexes of the speed regulator of single-phase motor device among the present invention is as follows:
As seen, the present invention develops for the single-phase capacitance formula electric machine speed regulation that solves 1.5KW or the following power of 2.2KW, can realize the multistep speed regulation of such motor, its motor mainly for the main air blower of the curing equipment of tobacco leaf baking production link of the prior art (its power is 1.5KW or 2.2KW).The present invention can realize that the blower motor rotating speed switches arbitrarily between 960 rev/mins, 1020 rev/mins, 1080 rev/mins, 1140 rev/mins, 1440 rev/mins, the tobacco grower can regulate fan delivery as required in the tobacco leaf cook stages, has improved tobacco leaf baking quality.
Speed regulator of single-phase motor device among the present invention satisfies the requirement that manual and automatic rotating speed switches, the speed regulator of single-phase motor device is subjected to the direct control of barn control system during auto state, can realize automatic high low cruise (the speed regulator of single-phase motor device leaves the control jack-plug socket).In addition, the increase of speed control device can not affect the normal operation of barn blower fan, has guaranteed that normally the baking flow process was unaffected after tobacco leaf entered barn.The speed regulator of single-phase motor device calculates operation in strict accordance with the V/F electric voltage frequency when low cruise, speed regulator low cruise output waveform is that high emulation is sinusoidal wave, can guarantee that the blower motor temperature rise is not higher than the normal temperature rise of full speed running, can not affect because of speed governing the useful life of blower motor.
As a second aspect of the present invention, a kind of flue-cured tobacco equipment (especially, being horizontal bulk curing barn) is provided, comprise monophase machine, also comprise for the speed regulating device that monophase machine carried out speed governing, speed regulating device are above-mentioned speed regulator of single-phase motor devices.
After having used the speed regulator of single-phase motor device among the present invention, it adopts bypass+pure sine wave frequency conversion scheme, the reliability that can improve, can satisfy flue-cured tobacco flow process demand, has prolonged useful life of blower fan.
Aspect reliability, the present invention considers that the blower fan environment for use is the mountain area that height above sea level is relatively high, humidity ratio is larger, and the rural power grids fluctuation is large; inclined to one side electrical network often can occur drawing, often also have to have a power failure the characteristics that the generator voltage fluctuation is large; therefore the bypass mode that adopts is to improve reliability.
Because flue-cured tobacco is in season, the fan operation time at a high speed is relatively large, and in fast mode, the present invention by electrical network or the direct fan power supply of generator, allows its rotating speed reach flue-cured tobacco procedure stipulation rotating speed directly by mains supply.Under fast mode, frequency control and main electrical network disconnect, and the main power source variable frequency inverter is not worked, and just make to show current flue-cured tobacco time and state by control panel.
Because 1.5KW of the prior art and 2.2KW monophase machine all do not have ready-made speed-regulating control device, this power section is also near the maximum power of monophase machine.Yet the speed setting controller for monophase machine of the prior art mostly is controllable silicon or voltage regulating transformer and so on, and the motor that this quasi-controller is regulated is generally greater than 600W, greater than solving velocity-stabilization and an electric machine temperature rise difficult problem behind the 600W.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a speed regulator of single-phase motor device is characterized in that, comprising: ac input end, main power source variable frequency inverter, control communication module, alternating current bypass selector switch, controller, control panel and output control switch;
Described control panel and described ac input end be connected controller and be connected, be used for setting rotating speed, described controller receives the described setting rotating speed from described control panel;
When described setting rotating speed was the first rotating speed, described controller control was directly exported by described output control switch behind the described alternating current bypass selector switch of process from the alternating current of described ac input end, controls simultaneously described main power source variable frequency inverter and quits work;
When described setting rotating speed is the second rotating speed less than described the first rotating speed, described controller is controlled frequently inverter of described main transformer according to described setting rotating speed, so that frequently exported by described output control switch behind the inverter through described main transformer from the alternating current of described ac input end.
2. speed regulator of single-phase motor device according to claim 1; it is characterized in that; described speed regulator of single-phase motor device also comprises: the overvoltage/undervoltage detecting unit; be electrically connected with described controller; be used for sending the overvoltage/undervoltage guard signal to described controller when detecting line voltage and surpass predetermined scope, described controller receives and directly uses behind the described overvoltage/undervoltage guard signal from the output as described output control switch of the alternating current of described ac input end.
3. speed regulator of single-phase motor device according to claim 2, it is characterized in that, described monophase machine adjusting device also comprises auxiliary EMC filter and auxiliary rectifier filter, described ac input end is connected with described control communication module with the auxiliary rectifier filter by described auxiliary EMC filter successively, and described overvoltage/undervoltage detecting unit is connected with described auxiliary EMC filter.
4. speed regulator of single-phase motor device according to claim 1; it is characterized in that; described speed regulator of single-phase motor device also comprises: current detection module; with described main power source variable frequency inverter be connected controller and be connected; be used for sending the overcurrent protection signal to described controller when detecting described main power source frequency converter overcurrent, described controller receives and directly uses behind the described overcurrent protection signal from the output as described output control switch of the alternating current of described ac input end.
5. speed regulator of single-phase motor device according to claim 1, it is characterized in that, described monophase machine adjusting device also comprises main EMC filter and main rectifier filter, described ac input end successively by described main EMC filter be connected rectifier filter and be connected with described main power source variable frequency inverter.
6. speed regulator of single-phase motor device according to claim 1 is characterized in that, described monophase machine adjusting device also comprises: variable frequency drive unit, described controller is controlled described main power source variable frequency inverter by described variable frequency drive unit.
7. speed regulator of single-phase motor device according to claim 1, it is characterized in that, described monophase machine adjusting device also comprises: the main power source output filter, described main power source variable frequency inverter is connected with described output control switch by described main power source output filter.
8. speed regulator of single-phase motor device according to claim 7 is characterized in that, described monophase machine adjusting device also comprises: the Voltage Feedback module, and its output is connected with described main power source output filter, and its output is connected with described controller.
9. a flue-cured tobacco equipment comprises monophase machine, it is characterized in that, also comprises for the speed regulating device that described monophase machine carried out speed governing, and described speed regulating device are each described speed regulator of single-phase motor devices in the claim 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100062639A CN103001575A (en) | 2013-01-08 | 2013-01-08 | Single-phase motor speed regulation device and flue-cured tobacco equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100062639A CN103001575A (en) | 2013-01-08 | 2013-01-08 | Single-phase motor speed regulation device and flue-cured tobacco equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103001575A true CN103001575A (en) | 2013-03-27 |
Family
ID=47929802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100062639A Pending CN103001575A (en) | 2013-01-08 | 2013-01-08 | Single-phase motor speed regulation device and flue-cured tobacco equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103001575A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106418676A (en) * | 2016-11-21 | 2017-02-22 | 龙岩烟草工业有限责任公司 | Method, device and system for controlling speed of feeding motor of tobacco shred feeder |
| CN109820230A (en) * | 2019-01-15 | 2019-05-31 | 云南省烟草公司大理州公司 | Improve the bulk curing barn circulating fan control method of tobacco leaf judging parameter |
| CN112815370A (en) * | 2021-01-18 | 2021-05-18 | 青岛海尔智慧厨房电器有限公司 | Air volume control system of range hood, device and method thereof |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4566289A (en) * | 1983-11-16 | 1986-01-28 | Hitachi, Ltd. | Refrigerator control system |
| JPS6258893A (en) * | 1985-09-05 | 1987-03-14 | Toyoda Autom Loom Works Ltd | Controller for motor |
| JPH01274691A (en) * | 1988-04-26 | 1989-11-02 | Omikenshi Co Ltd | Spinning machine driving gear and operating method for spinning machine |
| US5252905A (en) * | 1985-12-23 | 1993-10-12 | York International Corporation | Driving system for single phase A-C induction motor |
| US6037725A (en) * | 1998-01-28 | 2000-03-14 | Bristol Compressors, Inc. | Two step power output motor |
| CN1314023A (en) * | 1998-08-13 | 2001-09-19 | 布里斯托尔压缩机公司 | Two step power output motor and associated HVAC systems and methods |
| CN1330248A (en) * | 2001-06-05 | 2002-01-09 | 广州华南信息产业集团有限公司 | Frequency conversion driven air conditioner for room |
| CN2475222Y (en) * | 2001-04-12 | 2002-01-30 | 汕头经济特区自动化设备总厂有限公司 | AC bypass change-over monitor for use in inverter |
| CN201576957U (en) * | 2009-11-26 | 2010-09-08 | 曾仁昌 | Variable frequency power supply control system of low-voltage motor |
| CN201956957U (en) * | 2011-03-30 | 2011-08-31 | 洛阳沃能节电科技有限公司 | Power output DC electromagnetic balance control circuit for power-saving operation of motor |
-
2013
- 2013-01-08 CN CN2013100062639A patent/CN103001575A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4566289A (en) * | 1983-11-16 | 1986-01-28 | Hitachi, Ltd. | Refrigerator control system |
| JPS6258893A (en) * | 1985-09-05 | 1987-03-14 | Toyoda Autom Loom Works Ltd | Controller for motor |
| US5252905A (en) * | 1985-12-23 | 1993-10-12 | York International Corporation | Driving system for single phase A-C induction motor |
| JPH01274691A (en) * | 1988-04-26 | 1989-11-02 | Omikenshi Co Ltd | Spinning machine driving gear and operating method for spinning machine |
| US6037725A (en) * | 1998-01-28 | 2000-03-14 | Bristol Compressors, Inc. | Two step power output motor |
| CN1314023A (en) * | 1998-08-13 | 2001-09-19 | 布里斯托尔压缩机公司 | Two step power output motor and associated HVAC systems and methods |
| CN2475222Y (en) * | 2001-04-12 | 2002-01-30 | 汕头经济特区自动化设备总厂有限公司 | AC bypass change-over monitor for use in inverter |
| CN1330248A (en) * | 2001-06-05 | 2002-01-09 | 广州华南信息产业集团有限公司 | Frequency conversion driven air conditioner for room |
| CN201576957U (en) * | 2009-11-26 | 2010-09-08 | 曾仁昌 | Variable frequency power supply control system of low-voltage motor |
| CN201956957U (en) * | 2011-03-30 | 2011-08-31 | 洛阳沃能节电科技有限公司 | Power output DC electromagnetic balance control circuit for power-saving operation of motor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106418676A (en) * | 2016-11-21 | 2017-02-22 | 龙岩烟草工业有限责任公司 | Method, device and system for controlling speed of feeding motor of tobacco shred feeder |
| CN109820230A (en) * | 2019-01-15 | 2019-05-31 | 云南省烟草公司大理州公司 | Improve the bulk curing barn circulating fan control method of tobacco leaf judging parameter |
| CN112815370A (en) * | 2021-01-18 | 2021-05-18 | 青岛海尔智慧厨房电器有限公司 | Air volume control system of range hood, device and method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3292625B1 (en) | Wind turbine power generation system | |
| CN107005058B (en) | System and method for optimizing wind turbine operation | |
| EP2866323B1 (en) | Auxiliary electric power system and method of regulating voltages of the same | |
| CN102868346A (en) | Brushless doubly-fed motor excitation control system and control method using same | |
| CN202889279U (en) | Brushless doubly fed motor excitation control device | |
| CN201656905U (en) | Speed regulating system of a slip power feedback type asynchronous motor with large power and medium-high voltage | |
| CN105790298A (en) | Wind power generation control device and wind power generation system | |
| CN106685282B (en) | Electric appliance and motor speed regulating device thereof | |
| CN103475243A (en) | Control system and method for inverter | |
| CN102916627B (en) | Variable frequency starting method and device and storage battery supply | |
| CN103001575A (en) | Single-phase motor speed regulation device and flue-cured tobacco equipment | |
| CN104038075A (en) | Novel frequency converter | |
| CN103618493A (en) | Single-winding single-phase AC motor control module | |
| CN202673731U (en) | Frequency conversion energy-saving control system of dust removal draught fan | |
| CN105048496A (en) | Grid-connected control method of dual-motor wind generating set | |
| CN201690400U (en) | Frequency-conversion soft-start hybrid power cabinet | |
| CN204407972U (en) | A kind of novel online uninterrupted variable frequency power supply | |
| CN218549512U (en) | Be applied to electric energy quality flexible adjustment distribution equipment in sewage treatment field | |
| CN103684159B (en) | Prevent the control method of diesel locomotive auxiliary electricity generation circuit from overvoltage | |
| CN203747716U (en) | Composite-rotor brushless doubly-fed alternating-current motor all-quadrant variable-frequency speed regulation system | |
| KR20160144013A (en) | Control Method and Device for controlling Inverter and Power Converter for Power Saving | |
| CN203951370U (en) | A kind of new type inverter | |
| CN202475364U (en) | Stepless speed adjusting device of alternating current motor driven by single-phase power supply | |
| CN205123632U (en) | Brushless double -fed motor speed -adjusting system of redundant type that can flexiblely move | |
| CN201732275U (en) | Control device of plastic wire-receiving machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130327 |