CN201415910Y - Escalator controller - Google Patents
Escalator controller Download PDFInfo
- Publication number
- CN201415910Y CN201415910Y CN200920117560XU CN200920117560U CN201415910Y CN 201415910 Y CN201415910 Y CN 201415910Y CN 200920117560X U CN200920117560X U CN 200920117560XU CN 200920117560 U CN200920117560 U CN 200920117560U CN 201415910 Y CN201415910 Y CN 201415910Y
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- input end
- master controller
- frequency converter
- power
- main motor
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- Expired - Lifetime
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B50/00—Energy efficient technologies in elevators, escalators and moving walkways, e.g. energy saving or recuperation technologies
Abstract
The utility model provides an escalator controller with low energy consumption and long service life comprises a power supply input terminal, a main controller, a frequency converter and a main motor,wherein the power supply terminal end is connected with the main motor through the frequency converter, a power supply driving contactor is connected between the power supply input terminal and the main motor, a frequency converter driving contactor is connected between the output terminal of the frequency converter and the input terminal of the main motor, and the two contactors are mutually locked; a synchronizer is connected between the power supply input terminal and the output terminal of the frequency converter, and is connected with the main controller; when the output voltage of the frequency converter is identical with the phase and the frequency of the power supply voltage, the signal switching of the output power frequency/frequency conversion working state of the main controller is performed to control the power supply to drive the contactors and to control the frequency converter to drive the contactor to be switched off/on. The escalator controller has the beneficial effects that with the additionally arranged synchronizer, the main motor can be switched between the power frequency operation mode and the frequency conversion operation mode, thereby saving electric energy and prolonging the service life of the frequency converter; and the structure of the synchronizer is simple, thereby guaranteeing the smooth switching of the operation modes of the main motor.
Description
Technical field
The utility model relates to the controller of escalator, relates to a kind of escalator control device that main motor is switched between power frequency operation and converting operation specifically.
Background technology
The escalator of China's use at present generally has two kinds of staircase controller types, one class is a power frequency staircase controller, comprise parts such as PLC, contactless switch and main motor, main motor line frequency is always power frequency (50Hz), the shortcoming that such controller exists is: no matter have, unmanned using escalator, main motor is high-speed cruising always, so that not energy-conservation, and power consumption is big; Another kind of is frequency conversion staircase controller, comprise power input, master controller, parts such as frequency converter and main motor, master controller can judge whether people's using escalator according to the staircase photoelectric detecting signal, thereby change the frequency converter output frequency, main motor power supply frequency changes under Frequency Converter Control, during unmanned using escalator, main motor power supply frequency is lower than power frequency, the motor low cruise, when people's using escalator was arranged, main motor power supply frequency equaled power frequency, main motor high-speed cruising, also there is shortcoming in such controller: though nobody the time master motor low cruise, can save a part of electric energy, frequency converter is in mode of operation all the time, when working under power frequency, main motor still drives by frequency converter, frequency converter itself is also wanted consumed power, also is energy-saving run not, and to the performance requriements height of frequency converter, horsepower output is big, need to adopt big-power transducer, and frequency converter is short service life, cost height, uncontested relatively advantage.
Summary of the invention
The purpose of this utility model is the deficiency that overcomes above-mentioned power frequency staircase controller and frequency conversion staircase controller, makes its service life that further cuts down the consumption of energy, prolongs frequency converter, cost-cutting.
To achieve these goals, the technical solution adopted in the utility model is:
The escalator control device, comprise power input L1, L2, L3, master controller, frequency converter and main motor M, power input is connected with main motor input end by frequency converter, it is characterized in that: be connected with power drives contactless switch KMG between power input and the main motor input end, be connected with frequency converter between inverter output terminal and the main motor input end and drive contactless switch KMB, power drives contactless switch and frequency converter drive interlocking between the contactless switch, be connected with synchro between power input and the inverter output terminal, synchro links to each other with master controller, master controller links to each other with the control input end that frequency converter drives contactless switch KMB with power drives contactless switch KMG respectively, when synchro detects frequency converter output voltage and power line voltage same-phase same frequency, synchro is exported synchronizing signal to master controller, master controller is exported power frequency/frequency conversion mode of operation switching signal according to synchronizing signal with by the main motor frequency conversion/power frequency working state signal of master controller record, and control power drives contactless switch and frequency converter drive the contactless switch cut-off/close.
Synchro comprises: first reduction voltage circuit, and its input end R, S link to each other with the power input two-phase; Second reduction voltage circuit, its input end U, V link to each other with frequency converter two mouths, and first, second reduction voltage circuit is used for the High Level AC Voltage of power supply and frequency converter output is transformed into low-voltage ac signal; First compares Acquisition Circuit, links to each other with the first reduction voltage circuit mouth; Second compares Acquisition Circuit, links to each other with the second reduction voltage circuit mouth, and first, second compares Acquisition Circuit and is used for converting low-voltage ac signal to square-wave signal; Synchro microprocessor, its input end compare the Acquisition Circuit mouth with first, second respectively and link to each other, and are used for phase place and the frequency signal of comparison input end R, S and input end U, V; The synchronizing signal output circuit, its input end links to each other with the synchro output end of microprocessor, and its mouth links to each other with the master controller input end.
Described master controller comprises the memory device of master controller microprocessor and storage main motor power frequency/frequency conversion mode of operation, memory device links to each other with the master controller microprocessor, the synchronizing signal output circuit mouth of synchro links to each other with master controller microprocessor input end, the master controller output end of microprocessor is connected with power frequency operation/converting operation commutation circuit, and its mouth drives contactless switch KMB control input end with power drives contactless switch KMG with frequency converter and links to each other.
The described synchro first reduction voltage circuit increase has input end T, the second reduction voltage circuit increase that input end W is arranged, and synchro detects the sequential signal mutually of power supply and frequency converter output by input end R, S, T and input end U, V, W.
Master controller also comprises main motor forward and backward control circuit, main motor forward and backward control circuit input end links to each other with the master controller output end of microprocessor, be provided with forward and backward contactless switch KMD, the KMU of interlocking between power input and the power drives contactless switch, its control input end links to each other with the main motor forward and backward control circuit mouth of master controller, provides the cut-off/close signal by master controller.
Master controller also comprises main motor star-three angle control circuit, main motor star-three angle control circuit input end links to each other with the master controller output end of microprocessor, the star connection contactless switch KMS that main motor input end is connected with interlocking is connected contactless switch KMF with triangle, its control input end links to each other with the main motor star-three angle control circuit mouth of master controller, provides the cut-off/close signal by master controller.
The beneficial effects of the utility model are: owing to adopted synchro, main motor can switch between power frequency operation and converting operation:
1; when people's using escalator; the staircase controller has detected people's using escalator automatically; staircase automatically forwards high-speed cruising to from energy-conservation low cruise pulsation-free; make staircase reach efficient delivery; here synchro has just played crucial effects; if during no synchro, frequency conversion work switches to power frequency work meeting makes motor shut down or shake, so that using escalator is dangerous; also may damage motor; frequency converter; if there has been this synchro to detect switching point, just can switch power frequency from frequency conversion by pulsation-free, guaranteed using escalator safety like this; can not cause motor and frequency converter to damage yet; after power frequency work, then stop frequency converter output, effectively prolong frequency converter service life.
2; when unmanned using escalator; the staircase controller detects unmanned using escalator automatically; staircase automatically forwards energy-conservation low cruise to reposefully from high-speed cruising; it is energy-conservation that staircase is in; the consumption reduction state; here synchro has also played crucial effects; if during no synchro; power frequency work switches to frequency conversion work also can make motor shut down or vibrations; motor and frequency converter may be damaged,, just can switch power frequency from frequency conversion by pulsation-free if there has been this synchro to detect switching point; guaranteed staircase safety like this; after frequency conversion work, frequency converter is exported with regard to low cruise, has guaranteed that main motor and frequency converter are not damaged.Owing to adopted technique scheme, these parts of the present utility model play the energy-saving effect of frequency converter equally, and frequency converter is in low cruise all the time, can reduce the horsepower output of frequency converter again, has also just reduced the cost of frequency converter.Synchro can be avoided the staircase accident that causes thus, and staircase is safe and reliable operation all the time.
Add synchro, main motor can be switched between power frequency operation and converting operation, not only saved electric energy but also can prolong frequency converter service life; Synchronizer structure is simple, guarantees that main machine operation mode switches steadily; Phase sequence detects can effectively prevent the artificial wiring error of main motor; Main, counter-rotating contactless switch be arranged so that staircase uplink and downlink working mode selection is simple; Star-three corner connection contactless switch guarantees that main electric motor starting is steady.
Description of drawings
Fig. 1 is the structural representation of existing frequency conversion staircase controller;
Fig. 2 is the interconnecting wiring diagram of the utility model synchro;
Fig. 3 is the structured flowchart of synchro internal circuit;
Fig. 4 is the structured flowchart of master controller internal circuit;
Fig. 5 is the synchro interconnecting wiring diagram with phase sequence measuring ability;
Fig. 6 is the synchro interconnecting wiring diagram with forward and backward control;
Fig. 7 is the synchro interconnecting wiring diagram of strong opponent-triangle reduced voltage starting.
The specific embodiment
The utility model is described in further detail below in conjunction with embodiment and accompanying drawing:
Fig. 1 is the structural representation of existing frequency conversion staircase controller, and the input end of frequency converter links to each other with three phase mains, and the mouth of frequency converter links to each other with the power input of main motor, and main motor is driven by frequency converter all the time.
The utility model is improvements over the prior art, and its improvements are:
Referring to Fig. 2, the escalator control device, comprise power input L1, L2, L3, main motor M and frequency converter, power output end is connected with main motor power input end by frequency converter, also be provided with bypass between power input and the main motor M without frequency converter, be connected with power drives contactless switch KMG between power input and the main motor, be connected to frequency converter between frequency converter and the main motor M and drive contactless switch KMB, power drives contactless switch KMG and frequency converter drive interlocking between the contactless switch KMB, be connected with synchro between inverter output terminal and the power input, synchro has phase place and the phase place of frequency and frequency converter output voltage and the testing circuit of frequency that detects electric power output voltage, when frequency converter output voltage and power line voltage same-phase same frequency, be that frequency converter output voltage is when reaching power frequency 50Hz, synchro sends synchronizing signal, master controller (not shown among Fig. 2) is exported power frequency/frequency conversion mode of operation switching signal according to synchronizing signal with by the main motor frequency conversion/power frequency working state signal of master controller record, when detecting main motor and be converting operation, power drives contactless switch KMG closure and frequency converter are driven contactless switch KMB disconnection, the work of external source direct drive master motor M, if main motor power frequency operation, then master controller disconnects power drives contactless switch KMG and frequency converter driving contactless switch KMB closure.
Referring to Fig. 3, synchro comprises: first reduction voltage circuit, that is: the high-voltage AC signal that power supply is exported converts the 380V power frequency reduction voltage circuit of low-voltage ac signal to, and its input end R, S link to each other with the power input two-phase, and mouth links to each other with synchro microprocessor input end; Second reduction voltage circuit, that is: the high-voltage AC signal that frequency converter is exported converts the 380V power frequency reduction voltage circuit of low-voltage ac signal to, input end U, V link to each other with frequency converter two mouths, mouth links to each other with synchro microprocessor input end, is used for the High Level AC Voltage of power supply and frequency converter output is transformed into low-voltage ac signal; First compares Acquisition Circuit, links to each other with the first reduction voltage circuit mouth, and the low-voltage ac signal that second reduction voltage circuit is exported converts the 3.3V square-wave signal to; Second compares Acquisition Circuit, links to each other with the second reduction voltage circuit mouth, and the low-voltage ac signal that second reduction voltage circuit is exported converts the 3.3V square-wave signal to; Synchro microprocessor, its input end compare the Acquisition Circuit mouth with first, second respectively and link to each other, and are used for the phase place and the frequency signal of comparison R, S end and U, V end; The synchronizing signal output circuit, its input end links to each other with step device output end of microprocessor, mouth links to each other with the master controller input end, be used for exporting the synchronizing signal of between frequency converter driving and power supply direct drive, switching to master controller, when from input end R, S with from the square-wave signal phase place of input end U, V end when identical, to master controller output synchronizing signal with frequency.
Referring to Fig. 4, master controller comprises the memory device of master controller microprocessor and storage main motor power frequency/frequency conversion mode of operation, memory device links to each other with the master controller microprocessor, the synchronizing signal output circuit mouth of synchro links to each other with master controller microprocessor input end, master controller microprocessor input end also is connected with: 1) main motor speed testing circuit is used to detect main motor speed; 2) safety signal circuit when abnormal condition occurring, gives the master controller microprocessor with energizing signal; 3) photoelectric detective circuit is used for detecting whether people's using escalator is arranged; 4) Switching Power Supply provides power supply for the master controller microprocessor, and Switching Power Supply is defeated to link to each other with the alternating current 220V power supply as end, and its another mouth provides power supply through vdc 24V output to other equipment.The master controller output end of microprocessor is connected with: 1) main motor forward and backward control circuit is used to control the cut-off/close of main motor forward and backward contactless switch; 2) main motor star-three angle control circuit is used to control the cut-off/close of main motor star-three corner connection contactless switch; 3) frequency converter speed control circuit is used to control the output signal of frequency converter; 4) remote monitor and control communicating circuit is used for the operation of remote monitor and control master motor; 5) power frequency operation converting operation control switching circuit, its mouth drive contactless switch KMB control input end with power drives contactless switch KMG with frequency converter and link to each other, and are used to control the cut-off/close of power drives contactless switch and frequency converter driving contactless switch; 6) staircase fault display circuit is used for the staircase fault and shows.
Master controller can adopt PLC, also can adopt micro controller system, and present embodiment is for saving cost, adopt and have 60 I/O points (entrance point: 36, output point: M30280 micro controller system 24) not only guarantees reliable operation but also reduce the entire controller cost.
When synchro detects frequency converter output voltage and power line voltage same-phase same frequency, making power drives contactless switch KMG closure and frequency converter drive contactless switch KMB with energizing signal for master controller by the opener output circuit disconnects, with the frequency converter disconnection and by power frequency supply direct drive master motor, frequency converter is not worked, and has not only saved electric energy but also can prolong frequency converter service life.
Referring to Fig. 5, synchro can also detect R, S, T and U, V, W three road incoming signals, three the tunnel import promptly detected phase, frequency and three parameters of phase sequence simultaneously, and phase sequence detects and can prevent effectively that staircase from dispatching from the factory the main motor wiring in back owing to the people connects to cause the descending mistake of up staircase master commentaries on classics on the contrary.
Referring to Fig. 6, be provided with the positive contactor KMD and the counter-rotating contactless switch KMU of interlocking between power input and the power drives contactless switch KMG, its control input end links to each other with main motor forward and backward control circuit mouth, main motor forward and backward control circuit input end links to each other with the master controller output end of microprocessor, provide the cut-off/close signal by master controller, switching between main controller controls forward and backward contactless switch KMD, the KMU, staircase can be selected up mode of operation or downlink working mode as required.
Referring to Fig. 7, the star connection contactless switch KMS that main motor M power input motor input end also is connected with interlocking is connected contactless switch KMF with triangle, its control input end links to each other with main motor forward and backward control circuit mouth, provide the cut-off/close signal by master controller, master controller realizes that star connection contactless switch KMF and triangle connect the switching between the contactless switch KMS, the reduced voltage starting that is used for main motor guarantees that main electric motor starting is steady.
Working process of the present utility model is: when people's using escalator, staircase detects photosignal, master controller rises the frequency converter output voltage frequency, when synchro detects that frequency converter output voltage equals power frequency and when identical with the power line voltage phase place, synchro opener output circuit output synchronizing signal is given master controller, master controller output converting operation and power frequency operation switching signal, making power drives contactless switch KMG closure and frequency converter drive contactless switch KMB disconnects, the main motor energy-conservation low cruise under the Frequency Converter Control automatically forwards the power frequency high-speed cruising to, staircase is efficiently delivered, synchro switches to power frequency work from frequency conversion work, steadily switch and guarantee safety, stop frequency converter output afterwards, guarantee frequency converter service life; When unmanned using escalator, staircase detects photosignal, when synchro detects that frequency converter output voltage equals power frequency and when identical with the power line voltage phase place, synchro opener output circuit output synchronizing signal is given master controller, master controller is according to the main electric machine operation state signal of record, send power frequency operation and converting operation switching signal, power drives contactless switch KMG is disconnected and frequency converter driving contactless switch KMB closure, frequency converter output voltage progressively reduces, main motor forwards low speed energy-saving run under the Frequency Converter Control to from the power frequency high-speed cruising automatically, save electric energy, synchro switches to frequency conversion work from power frequency work, frequency converter output low speed voltage steadily switches and guarantees safety.
Claims (6)
1. escalator control device, comprise power input (L1, L2, L3), master controller, frequency converter and main motor (M), power input is connected with main motor input end by frequency converter, it is characterized in that: be connected with power drives contactless switch (KMG) between power input and the main motor input end, be connected with frequency converter between inverter output terminal and the main motor input end and drive contactless switch (KMB), power drives contactless switch and frequency converter drive interlocking between the contactless switch, be connected with synchro between power input and the inverter output terminal, synchro links to each other with master controller, master controller links to each other with the control input end that frequency converter drives contactless switch (KMB) with power drives contactless switch (KMG) respectively, when synchro detects frequency converter output voltage and power line voltage same-phase same frequency, synchro is exported synchronizing signal to master controller, master controller is according to the frequency conversion/power frequency mode of operation of synchronizing signal and master controller record, and control power drives contactless switch and frequency converter drive the cut-off/close of contactless switch.
2. escalator control device as claimed in claim 1 is characterized in that synchro comprises: first reduction voltage circuit, and its input end (R, S) links to each other with the power input two-phase; Second reduction voltage circuit, its input end (U, V) links to each other with frequency converter two mouths, and first, second reduction voltage circuit is used for the High Level AC Voltage of power supply and frequency converter output is transformed into low-voltage ac signal; First compares Acquisition Circuit, links to each other with the first reduction voltage circuit mouth; Second compares Acquisition Circuit, links to each other with the second reduction voltage circuit mouth, and first, second compares Acquisition Circuit and is used for converting low-voltage signal to square-wave signal; Synchro microprocessor, its input end compare the Acquisition Circuit mouth with first, second respectively and link to each other, and are used for the phase place and the s-f of comparison input end (R, S) and input end (U, V); The synchronizing signal output circuit, its input end links to each other with the synchro output end of microprocessor, and its mouth links to each other with the master controller input end.
3. escalator control device as claimed in claim 2, it is characterized in that: described master controller comprises the memory device of master controller microprocessor and storage main motor power frequency/frequency conversion mode of operation, memory device links to each other with the master controller microprocessor, the synchronizing signal output circuit mouth of synchro links to each other with master controller microprocessor input end, the master controller output end of microprocessor is connected with power frequency operation/converting operation commutation circuit, and its mouth drives contactless switch (KMB) control input end with power drives contactless switch (KMG) and frequency converter and links to each other.
4. escalator control device as claimed in claim 2, it is characterized in that: the described synchro first reduction voltage circuit increase has input end (T), the second reduction voltage circuit increase that input end (W) is arranged, and synchro detects the sequential signal mutually of power supply and frequency converter output by input end (R, S, T) and input end (U, V, W).
5. escalator control device as claimed in claim 3, it is characterized in that: master controller also comprises main motor forward and backward control circuit, main motor forward and backward control circuit input end links to each other with the master controller output end of microprocessor, be provided with the forward and backward contactless switch (KMD, KMU) of interlocking between power input and the power drives contactless switch, its control input end links to each other with the main motor forward and backward control circuit mouth of master controller, provides the cut-off/close signal by master controller.
6. escalator control device as claimed in claim 3, it is characterized in that: described master controller also comprises main motor star-three angle control circuit, main motor star-three angle control circuit input end links to each other with the master controller output end of microprocessor, the star connection contactless switch (KMS) that main motor input end is connected with interlocking is connected contactless switch (KMF) with triangle, its control input end links to each other with the main motor star-three angle control circuit mouth of master controller, provides the cut-off/close signal by master controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920117560XU CN201415910Y (en) | 2009-04-13 | 2009-04-13 | Escalator controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920117560XU CN201415910Y (en) | 2009-04-13 | 2009-04-13 | Escalator controller |
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| Publication Number | Publication Date |
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| CN201415910Y true CN201415910Y (en) | 2010-03-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200920117560XU Expired - Lifetime CN201415910Y (en) | 2009-04-13 | 2009-04-13 | Escalator controller |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102005994A (en) * | 2010-11-10 | 2011-04-06 | 无锡经纬纺织科技试验有限公司 | Same-phase switching circuit and actuating device of rare-earth permanent magnet synchronous electric motor |
| CN102255602A (en) * | 2011-07-26 | 2011-11-23 | 深圳市海浦蒙特科技有限公司 | Method and system for smoothly switching alternated current motor from frequency converter power supply to power-frequency power supply |
| CN102255601A (en) * | 2011-07-18 | 2011-11-23 | 李增光 | Multifunctional energy-saving on-line monitoring device and method for frequency converter |
| CN102377385A (en) * | 2010-08-26 | 2012-03-14 | 日立电梯（中国）有限公司 | Bypass variable-frequency controller with phase detection |
| CN102412782A (en) * | 2010-09-21 | 2012-04-11 | 苏州默纳克控制技术有限公司 | System and method for controlling power supply switch in bypass frequency conversion stairway |
| CN102790562A (en) * | 2012-08-10 | 2012-11-21 | 上海新时达电气股份有限公司 | Method for smoothly switching motor between variable-frequency power supply and power-frequency power supply |
| CN103415460A (en) * | 2011-01-04 | 2013-11-27 | 通力股份公司 | Method and conveyor system |
| CN104030145A (en) * | 2014-05-30 | 2014-09-10 | 内蒙古天丰智能科技有限公司 | Escalator variable frequency control device and method |
| CN104555688A (en) * | 2013-10-25 | 2015-04-29 | 上海三菱电梯有限公司 | Control device for passenger conveying equipment and realizing method thereof |
| CN106698168A (en) * | 2017-03-10 | 2017-05-24 | 江苏西德电梯有限公司 | Energy conservation escalator control circuit and control method |
| US10601356B2 (en) | 2017-09-15 | 2020-03-24 | Otis Elevator Company | Frequency converter, bypass frequency conversion control system and switching control method thereof |
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2009
- 2009-04-13 CN CN200920117560XU patent/CN201415910Y/en not_active Expired - Lifetime
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102377385A (en) * | 2010-08-26 | 2012-03-14 | 日立电梯（中国）有限公司 | Bypass variable-frequency controller with phase detection |
| CN102377385B (en) * | 2010-08-26 | 2014-04-23 | 日立电梯（广州）自动扶梯有限公司 | Bypass variable-frequency controller with phase detection |
| CN102412782A (en) * | 2010-09-21 | 2012-04-11 | 苏州默纳克控制技术有限公司 | System and method for controlling power supply switch in bypass frequency conversion stairway |
| CN102412782B (en) * | 2010-09-21 | 2014-09-10 | 苏州默纳克控制技术有限公司 | System and method for controlling power supply switch in bypass frequency conversion stairway |
| CN102005994A (en) * | 2010-11-10 | 2011-04-06 | 无锡经纬纺织科技试验有限公司 | Same-phase switching circuit and actuating device of rare-earth permanent magnet synchronous electric motor |
| CN103415460A (en) * | 2011-01-04 | 2013-11-27 | 通力股份公司 | Method and conveyor system |
| CN103415460B (en) * | 2011-01-04 | 2015-11-25 | 通力股份公司 | Forwarder driving method and transmitter system |
| US8853992B2 (en) | 2011-01-04 | 2014-10-07 | Kone Corporation | Method and conveyor system |
| CN102255601A (en) * | 2011-07-18 | 2011-11-23 | 李增光 | Multifunctional energy-saving on-line monitoring device and method for frequency converter |
| CN102255601B (en) * | 2011-07-18 | 2013-09-25 | 李增光 | Multifunctional energy-saving on-line monitoring device and method for frequency converter |
| CN102255602A (en) * | 2011-07-26 | 2011-11-23 | 深圳市海浦蒙特科技有限公司 | Method and system for smoothly switching alternated current motor from frequency converter power supply to power-frequency power supply |
| CN102790562A (en) * | 2012-08-10 | 2012-11-21 | 上海新时达电气股份有限公司 | Method for smoothly switching motor between variable-frequency power supply and power-frequency power supply |
| CN104555688A (en) * | 2013-10-25 | 2015-04-29 | 上海三菱电梯有限公司 | Control device for passenger conveying equipment and realizing method thereof |
| CN104555688B (en) * | 2013-10-25 | 2017-01-11 | 上海三菱电梯有限公司 | Control device for passenger conveying equipment and realizing method thereof |
| CN104030145A (en) * | 2014-05-30 | 2014-09-10 | 内蒙古天丰智能科技有限公司 | Escalator variable frequency control device and method |
| CN104030145B (en) * | 2014-05-30 | 2016-09-28 | 内蒙古天丰智能科技有限公司 | Frequency converting controller for moving staircase and method thereof |
| CN106698168A (en) * | 2017-03-10 | 2017-05-24 | 江苏西德电梯有限公司 | Energy conservation escalator control circuit and control method |
| US10601356B2 (en) | 2017-09-15 | 2020-03-24 | Otis Elevator Company | Frequency converter, bypass frequency conversion control system and switching control method thereof |
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