CN104210911A - Turn-off type elevator power supply and realization method of turn-off type elevator power supply - Google Patents
Turn-off type elevator power supply and realization method of turn-off type elevator power supply Download PDFInfo
- Publication number
- CN104210911A CN104210911A CN201410417930.7A CN201410417930A CN104210911A CN 104210911 A CN104210911 A CN 104210911A CN 201410417930 A CN201410417930 A CN 201410417930A CN 104210911 A CN104210911 A CN 104210911A
- Authority
- CN
- China
- Prior art keywords
- turn
- power supply
- voltage
- circuit
- elevator power
- 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
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a turn-off type elevator power supply and a realization method of the turn-off type elevator power supply. According to the scheme, a PN power supply is controlled and connected through a turn-off type elevator power supply adjusting loop, in addition, the voltage is adjusted and stabilized in the preset voltage range, and an output power supply can be turned off in case of need. The scheme has the advantages that a digital adjustable power supply replaces the traditional power supply, the conversion efficiency of the power supply is improved, the power supply voltage stabilization is ensured, the power supply can be turned off according to requirements, and different voltages can be set according to different loads.
Description
Technical field
The present invention relates to elevator technology, be specifically related to the power technology in elevator.
Background technology
Referring to Fig. 1, be depicted as the schematic diagram of realizing of traditional elevator power supply.As seen from the figure, in elevator industry, generally all adopt at present voltage transformer by the lower voltage of input, during direct supply, after overcommutation, export again.Thus, elevator device needs several voltage, and voltage transformer will have several groups of coils so, and in addition existing elevator power supply in use also exists following problem:
1. when traditional voltage transformer is worked, heating, has noise;
2. when input power changes, output voltage also can and then change, and the operating mode of load is difficult to guarantee constant;
3., when elevator stops, particularly, after elevator is shut down, because power supply can not turn-off, control system has electricity always, the energy that stand-by power consumption is unnecessary.
Summary of the invention
For the existing problem of existing elevator power supply, the object of the present invention is to provide a kind of elevator power supply that turn-offs formula, this power supply architecture is simple, reliable and stable, by detecting, when input voltage changes, carry out voltage adjustment, the voltage that guarantees output voltage and setting keep one to, and can close out-put supply when needed.
The elevator power supply that can turn-off formula for this, the present invention also provides a kind of implementation method.
In order to achieve the above object, the present invention adopts following technical scheme:
A kind of formula elevator power supply that turn-offs, this elevator power supply comprises that can turn-off formula elevator power supply adjusts loop, the described formula elevator power supply that turn-offs is adjusted loop control and is connected PN power supply, and by voltage adjustment and be stabilized in the voltage range of setting, and can turn-off out-put supply when needed.
In above-mentioned elevator power source design, describedly turn-off that formula elevator power supply adjusts that loop comprises driving circuit, can turn-off electronic switch, voltage finishing circuit, circuit for detecting, MCU microprocessor, the input end of described voltage finishing circuit connects PN power supply by turn-offing electronic switch, its mouth is as the mouth of elevator power supply, described driving circuit drives to control and can turn-off electronic switch, described circuit for detecting is arranged on the mouth of voltage finishing circuit, and described MCU microprocessor connects respectively driving circuit and circuit for detecting.
Further, described voltage finishing circuit can be, but not limited to BUCK loop, for example, can be FLYBACK forward converter.
Further, described circuit for detecting is voltage detection circuit or current-sensing circuit or voltage detection circuit and current-sensing circuit.
Further, described MCU microprocessor comprises parameter setting module, logical operation module, I/O ORPWM interface and at least one signal feedback unit, the input end of described logical operation module connects respectively parameter setting module and signal feedback unit, its mouth is connected to the input end of I/O OR PWM interface, the mouth of described I/O OR PWM interface is connected to driving circuit, the input end of described signal feedback unit is connected to circuit for detecting, and its mouth is connected to the input end of logical operation module.
Further, described signal feedback unit comprises reactive circuit and A/D change-over circuit, the input connection sensing circuit of described A/D change-over circuit, and its output is connected to reactive circuit, and described reactive circuit is connected to logical operation module.
Further, described MCU microprocessor can be to combine with the control MCU microprocessor of elevator, also can be independent of elevator and control outside MCU microprocessor, separately sets up a MCU microprocessor.
Turn-offed formula elevator power supply for such scheme, its corresponding implementation method, the method is adjusted loop by the numeral of a closed loop, out-put supply is detected in real time, and thus the PN voltage of input is adjusted in real time, out-put supply is stabilized in the voltage range of setting, and can turn-offs out-put supply when needed.
In above-mentioned elevator power supply implementation method scheme, first according to the target voltage values of setting, by turn-offing electronic switch, the PN voltage of input is adjusted, then carried out after voltage arranges exporting the voltage of setting;
Then, output voltage and electric current carry out detecting real-time, if when detecting low voltage or raising, by turn-offing electronic switch, the PN voltage of input are adjusted, then are carried out the magnitude of voltage that voltage arrangement is being set output voltage stabilization;
If detect electric current while going beyond the scope, by turn-offing, electronic switch turn-offs or restriction out-put supply;
Finally, when power supply does not need to power, can turn-off the output of electronic switch power.
This programme has replaced traditional power supply with digital adjustable power supply, improved the conversion efficiency of power supply, guaranteed the stable of power line voltage, can turn-off by demand, voltage that can be different according to different load set, effectively solves the existing problem of transmission elevator power supply.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, further illustrate the present invention.
Fig. 1 is the schematic diagram of traditional elevator power supply;
Fig. 2 can turn-off the schematic circuit diagram of formula elevator power supply in the present invention;
Fig. 3 is for turn-offing the voltage finishing circuit schematic diagram in BUCK loop in formula elevator power supply;
Fig. 4 is for turn-offing the voltage finishing circuit schematic diagram of FLYBACK forward converter in formula elevator power supply;
Fig. 5 is the application principle figure that can turn-off formula elevator power supply in the present invention.
The specific embodiment
For technological means, creation characteristic that the present invention is realized, reach object and effect is easy to understand, below in conjunction with concrete diagram, further set forth the present invention.
Referring to Fig. 1, the schematic circuit diagram that turn-off formula elevator power supply provided by the invention shown in it.As seen from the figure, this elevator power supply mainly comprise driving circuit 1, can turn-off electronic switch 4, voltage finishing circuit 3, circuit for detecting 5, MCU microprocessor 2.Wherein, the input end of voltage finishing circuit 3 connects PN power supply by turn-offing electronic switch 4, its mouth is as the mouth of elevator power supply, and driving circuit 2 drives control can turn-off electronic switch, circuit for detecting 5 is arranged on the mouth of voltage finishing circuit 3, MCU microprocessor connects respectively driving circuit and circuit for detecting simultaneously, coordinate thus to form and can turn-off formula elevator power supply adjustment loop, this can turn-off formula elevator power supply and adjust loop control connection PN power supply, and by voltage adjustment and be stabilized in the voltage range of setting, and can turn-off out-put supply when needed.
Concrete, voltage finishing circuit 3, for voltage is arranged, forms reliable and stable output voltage.This voltage finishing circuit 3 can adopt the BUCK loop shown in Fig. 3 to form, but is not limited to this, and the loop that it can also other structure, such as adopting FLYBACK forward converter formation shown in Fig. 4 etc.As an example, referring to Fig. 2, the voltage finishing circuit 3 that can turn-off shown in it in formula elevator power supply adopts BUCK loop structure, mainly by inductance 31, electric capacity 32 and flywheel diode 33, formed, inductance 31 one end are connected as an input end with the negative electrode of flywheel diode 33, the P that is connected to PN power supply by turn-offing electronic switch 4 holds, and a side of inductance 31 one end and electric capacity 32 is joined, and exports as direct-flow positive pole; The anode of flywheel diode 33, as another input end, connects the N end of PN power supply, and the opposite side of the anode of flywheel diode 33 and electric capacity 32 joins, and exports as direct current negative pole.
Can turn-off electronic switch 4, it is arranged between the P end of voltage finishing circuit 3 and PN power supply, inputs to the voltage of voltage finishing circuit 3 for regulating or turn-off PN power supply.Electronic switch 4 can be turn-offed and specifically other electronic switchs that can turn-off such as IGBT or SCR can be adopted.As an example, if adopt IGBT as turn-offing electronic switch, can, by adjusting the dutycycle of the turn-on and turn-off of IGBT, realize and regulate or turn-off the voltage that PN power supply inputs to voltage finishing circuit 3.
The mouth control linkage of driving circuit 1 can be turn-offed electronic switch 4, and input end is controlled by MCU microprocessor 2, for obtaining the control command of MCU microprocessor 2, convert this control command to action command that control can be turn-offed electronic switch 4, and to turn-offing electronic switch 4, control thus.
Circuit for detecting 5 mainly comprises voltage detection circuit 51, or current-sensing circuit 52, or voltage detection circuit 51 and current-sensing circuit 52, for the output voltage to this power supply, or electric current, or voltage and current carries out real-time monitoring.The concrete composition structure of circuit for detecting 5 can be determined according to the actual requirements.As an example, referring to Fig. 2, the circuit for detecting 5 that can turn-off shown in it in formula elevator power supply comprises circuit for detecting 51 and current-sensing circuit 52, and both are located on the mouth of voltage finishing circuit 3 simultaneously, and the output voltage and the current value that through over voltage finishing circuit 3, arrange are carried out to real-time monitoring.
MCU microprocessor 2 is as the control center of whole elevator power supply, and it is control linkage driving circuit 1 and circuit for detecting 5 respectively, thereby form, can turn-off formula elevator power supply adjustment loop.These MCU microprocessor 2 target setting voltages, and according to this target voltage, control driving circuit 1 and drive and can turn-off electronic switch 4 and regulate voltage that PN power supplys input to voltage finishing circuit 3 to target voltage; Output voltage and/or the electric current of the voltage finishing circuit 3 that the real-time reception circuit for detecting 5 of MCU microprocessor 2 monitors simultaneously, and calculate with the target voltage of setting, according to result of calculation, control in real time driving circuit 1 driving again and can turn-off the voltage that electronic switch 4 adjusting PN power supplys input to voltage finishing circuit 3, make the output voltage stabilization of voltage finishing circuit 3 at the target voltage of setting.
As seen from the figure, this MCU microprocessor 2 mainly comprises parameter setting module 21, logical operation module 22, I/O OR PWM interface 23, reactive circuit 25,27 and A/D change-over circuit 24,26.
Reactive circuit 25 forms voltage signal feedback units with A/D change-over circuit 24, for receiving and feeding back the voltage signal that circuit for detecting 5 voltage detection circuits 51 detect.The input end of A/D change-over circuit 24 is connected to the mouth of voltage detection circuit 51, and the mouth of A/D change-over circuit 24 is connected to the input end of reactive circuit 25, and the mouth of reactive circuit 25 is connected to logical operation module 22.Wherein, A/D change-over circuit 24 converts the voltage analog signal of the transmission of voltage detection circuit 51 to corresponding digital signal, and this digital signal is sent to reactive circuit 25, reactive circuit 25 converts this digital signal to be convenient to the value of feedback that logical operation module 22 is calculated to, and is sent to logical operation module 22.
Reactive circuit 27 forms current signal feedback units with A/D change-over circuit 26, for receiving and feeding back the current signal that circuit for detecting 5 current-sensing circuits 52 detect.The input end of A/D change-over circuit 26 is connected to the mouth of current-sensing circuit 52, and the mouth of A/D change-over circuit 26 is connected to the input end of reactive circuit 27, and the mouth of reactive circuit 27 is connected to logical operation module 22.Wherein, A/D change-over circuit 26 converts the current analog signal of the transmission of current-sensing circuit 52 to corresponding digital signal, and this digital signal is sent to reactive circuit 27, reactive circuit 27 converts this digital signal to be convenient to the value of feedback that logical operation module 22 is calculated to, and is sent to logical operation module 22.
Parameter setting module 21, for setting different output voltages, produces different voltage sources, also can set the current limit of output, can adjust or power cutoff protection power source and load surpassing when abnormal.
The input of logical operation module 22 connects parameter setting module 21 and reactive circuit 25,27, and mouth is connected to I/O OR PWM interface 23.The parameter that it is set according to parameter setting module 21 and the value of feedback of reactive circuit are carried out logical calculated and are obtained corresponding control command, and reach I/O OR PWM interface 23.
I/O OR PWM interface 23, its input end is connected to logical operation module 22, and mouth is connected to driving circuit 1, according to the digital control instruction of logical operation module 22 outputs, controls driving circuit 1.
The turn-offed formula elevator power supply forming is thus adjusted loop by the numeral of a closed loop, out-put supply is detected in real time, and thus the PN voltage of input is adjusted in real time and is stabilized within the scope of the vdc of setting, and can turn-off out-put supply when needed.
The turn-offed formula elevator power supply forming thus, when concrete application, can be independent of existing elevator device and redesign parts, also can be incorporated in existing elevator device.
By a concrete application example, further illustrate this programme below.
Referring to Fig. 5, it is depicted as the application principle figure that can turn-off formula elevator power supply in this example.Turn-offed formula elevator power supply in this example, it can turn-off electronic switch 4 and adopt IGBT, and voltage finishing circuit 3 adopts BUCK loop structure, mainly inductance 31, electric capacity 32 and flywheel diode 33, consists of.
In this exemplary application, in order effectively to utilize the resource of elevator device, PN power supply is directly taken to the DC bus of frequency converter.Wherein: the P end of frequency changer direct current bus is connected to the upper end of IGBT, one end of the lower termination inductance 31 of IGBT and the negative terminal of afterflow diode 33, another termination capacitor 32 of inductance 31 and the anode of detecting voltage 51 and one end of current sense 52, the anode of the negative terminal of detecting voltage 51 and cond 32 and afterflow diode 33 is connected to the N end of frequency changer direct current bus, forms the major loop of power supply.
In order effectively to utilize the resource of elevator device, microprocessor 2 directly uses the logic control MCU of elevator, concrete: according to the target voltage of parameter setting module 21, through computing and logic module 22, process, control opening or closing of I/O OR PWM interface 23, after the further processing of overdrive circuit 1, open or turn-off IGBT, the voltage that output is set after the voltage arrangement of inductance 31, electric capacity 32 and afterflow diode 33.
Thus, on the low side or while raising in frequency converter bus voltage, through detecting voltage 51, A/D change-over circuit 24, reactive circuit 25, after computing and logic module 22 are processed, adjust opening or closing of I/O OR PWM interface 23, after the further processing of overdrive circuit 1, adjust the dutycycle of the turn-on and turn-off of IGBT, the voltage that output voltage stabilization is being set.
Moreover, through current sense 52, A/D change-over circuit 26, reactive circuit 27, out-put supply can be turn-offed or limit to parameter setting module 21 and computing and logic module 22 after finding that electric current goes beyond the scope, after processing.
Moreover when elevator stops or locks ladder and wait power supply not need to power, elevator is controlled MCU can be by computing and logic module 22 or I/O OR PWM interface 23, through overdrive circuit 1 shutoff IGBT, thus the output of power cutoff.
Finally, can comprehensively analyze the safety of elevator device according to the situation of the detecting value of power supply, when abnormity of power supply can affect elevator safety, make fault, and allow elevator enter safe condition, wait Awaiting Overhaul.
From upper example, the power supply that this programme provides is with detecting function, when input voltage changes, can oneself adjust, the voltage that guarantees output voltage and setting keep one to, and can close out-put supply when needed.
The power supply that this programme provides has been realized the digital adjustment of out-put supply, and system can clearly be controlled the situation of elevator power supply, can adjust according to this state of elevator.
The power supply that this programme provides, can be integrated the input end of elevator different electrical power not impact of output voltage in the variation of input voltage, as adopted the DC bus of frequency converter as input power, is beneficial to the integration of system and integrated.
The power supply that this programme provides substitutes traditional voltage transformer with turn-offing electronic switch, has improved the efficiency of power supply conversion, the noise while having eliminated voltage transformer work.
The power supply that this programme provides can be closed, and in elevator standby and when ladder lock PTO Power Take Off as required, reduces stand-by power consumption.
More than show and described groundwork of the present invention, principal character and advantage of the present invention.The technical personnel of the industry should be understood; the present invention is not restricted to the described embodiments; that in above-described embodiment and specification sheets, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (9)
1. one kind can be turn-offed formula elevator power supply, it is characterized in that, described elevator power supply comprises that can turn-off formula elevator power supply adjusts loop, the described formula elevator power supply that turn-offs is adjusted loop control connection PN power supply, and by voltage adjustment and be stabilized in the voltage range of setting, and can turn-off out-put supply when needed.
2. a kind of formula elevator power supply that turn-offs according to claim 1, it is characterized in that, the described formula elevator power supply adjustment loop of turn-offing comprises driving circuit, can turn-off electronic switch, voltage finishing circuit, circuit for detecting, MCU microprocessor, the input end of described voltage finishing circuit connects PN power supply by turn-offing electronic switch, its mouth is as the mouth of elevator power supply, described driving circuit drives to control and can turn-off electronic switch, described circuit for detecting is arranged on the mouth of voltage finishing circuit, described MCU microprocessor connects respectively driving circuit and circuit for detecting.
3. a kind of formula elevator power supply that turn-offs according to claim 2, is characterized in that, described voltage finishing circuit is BUCK loop or FLYBACK forward converter.
4. a kind of formula elevator power supply that turn-offs according to claim 2, is characterized in that, described circuit for detecting is voltage detection circuit or current-sensing circuit or voltage detection circuit and current-sensing circuit.
5. a kind of formula elevator power supply that turn-offs according to claim 2, it is characterized in that, described MCU microprocessor comprises parameter setting module, logical operation module, I/O OR PWM interface, and at least one signal feedback unit, the input end of described logical operation module connects respectively parameter setting module and signal feedback unit, its mouth is connected to the input end of I/O OR PWM interface, the mouth of described I/O OR PWM interface is connected to driving circuit, the input end of described signal feedback unit is connected to circuit for detecting, its mouth is connected to the input end of logical operation module.
6. a kind of formula elevator power supply that turn-offs according to claim 5, it is characterized in that, described signal feedback unit comprises reactive circuit and A/D change-over circuit, the input connection sensing circuit of described A/D change-over circuit, its output is connected to reactive circuit, and described reactive circuit is connected to logical operation module.
7. according to claim 5, it is characterized in that, described MCU microprocessor can be to combine with the control MCU microprocessor of elevator, also can be independent of elevator and control outside MCU microprocessor, separately sets up a MCU microprocessor.
8. the implementation method that can turn-off formula elevator power supply, it is characterized in that, described method is adjusted loop by the numeral of a closed loop, out-put supply is detected in real time, and thus the PN voltage of input is adjusted in real time, out-put supply is stabilized in the voltage range of setting, and can turn-offs out-put supply when needed.
9. a kind of implementation method of turn-offing formula elevator power supply according to claim 8, it is characterized in that, first according to the target voltage values of setting, by turn-offing electronic switch, the PN voltage of input is adjusted, then carried out after voltage arranges exporting the voltage of setting;
Then, output voltage and electric current carry out detecting real-time, if when detecting low voltage or raising, by turn-offing electronic switch, the PN voltage of input are adjusted, then are carried out the magnitude of voltage that voltage arrangement is being set output voltage stabilization;
If detect electric current while going beyond the scope, by turn-offing, electronic switch turn-offs or restriction out-put supply;
Finally, when power supply does not need to power, can turn-off the output of electronic switch power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410417930.7A CN104210911B (en) | 2014-08-22 | 2014-08-22 | One can turn off formula elevator power supply and implementation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410417930.7A CN104210911B (en) | 2014-08-22 | 2014-08-22 | One can turn off formula elevator power supply and implementation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104210911A true CN104210911A (en) | 2014-12-17 |
| CN104210911B CN104210911B (en) | 2016-09-14 |
Family
ID=52092897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410417930.7A Active CN104210911B (en) | 2014-08-22 | 2014-08-22 | One can turn off formula elevator power supply and implementation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104210911B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4719995A (en) * | 1986-05-08 | 1988-01-19 | Mitsubishi Denki Kabushiki Kaisha | Control apparatus for A.C. elevator |
| EP1225150A1 (en) * | 2001-01-09 | 2002-07-24 | Inventio Ag | Device for noiseless operating of elevator brake |
| JP2004131207A (en) * | 2002-10-08 | 2004-04-30 | Mitsubishi Electric Corp | Brake control system for elevator |
| CN101068736A (en) * | 2005-07-26 | 2007-11-07 | 三菱电机株式会社 | Elevator device |
| CN101367479B (en) * | 2007-08-17 | 2012-07-04 | 株式会社日立制作所 | Brake device of elevator |
| CN204211291U (en) * | 2014-08-22 | 2015-03-18 | 上海吉亿电机有限公司 | One can turn off formula elevator power supply |
-
2014
- 2014-08-22 CN CN201410417930.7A patent/CN104210911B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4719995A (en) * | 1986-05-08 | 1988-01-19 | Mitsubishi Denki Kabushiki Kaisha | Control apparatus for A.C. elevator |
| EP1225150A1 (en) * | 2001-01-09 | 2002-07-24 | Inventio Ag | Device for noiseless operating of elevator brake |
| JP2004131207A (en) * | 2002-10-08 | 2004-04-30 | Mitsubishi Electric Corp | Brake control system for elevator |
| CN101068736A (en) * | 2005-07-26 | 2007-11-07 | 三菱电机株式会社 | Elevator device |
| CN101367479B (en) * | 2007-08-17 | 2012-07-04 | 株式会社日立制作所 | Brake device of elevator |
| CN204211291U (en) * | 2014-08-22 | 2015-03-18 | 上海吉亿电机有限公司 | One can turn off formula elevator power supply |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104210911B (en) | 2016-09-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104210982B (en) | A kind of elevator internal contracting brake control system and control method | |
| CN203872056U (en) | Direct-current power supply controlled by constant power | |
| CN104901566A (en) | Inversion device and control method | |
| CN101237185A (en) | Energy feedback and harmonic wave passive compensation system applicable to commutation device | |
| CN105098786A (en) | System and method for stabilizing voltage fluctuation of wind power micro-grid employing super capacitors | |
| WO2024078198A1 (en) | Energy storage system control method and apparatus, and energy storage system | |
| CN110784095A (en) | High-efficiency switching power supply circuit and LED display screen | |
| CN204046415U (en) | The quick startup control circuit of converter | |
| US11637431B2 (en) | Inverter | |
| CN109167392B (en) | System control method, photovoltaic system and air conditioning system | |
| CN207955365U (en) | A kind of charging pile and its charging module | |
| CN103796389B (en) | High-high brightness hoisting module, controllable silicon light modulation LED drive circuit and system | |
| CN101247073B (en) | Energy feedback and harmonic reactive-load compensation system suitable for multi-group commutating device | |
| Zhang et al. | Autonomous control strategy of bidirectional AC/DC converter in low voltage hybrid microgrid | |
| CN104242645A (en) | Method and device for controlling step-down circuits | |
| CN204211291U (en) | One can turn off formula elevator power supply | |
| CN204211417U (en) | A kind of elevator internal contracting brake control system | |
| CN208369467U (en) | totem PFC circuit and air conditioner | |
| CN107681687B (en) | Energy storage-based bus overvoltage suppression control method and system for distributed system | |
| CN104210911A (en) | Turn-off type elevator power supply and realization method of turn-off type elevator power supply | |
| CN201608689U (en) | Electric variable pitch control device and electric variable pitch control system | |
| CN204928161U (en) | Electric wire netting reactive power and voltage compensation device | |
| CN103944386B (en) | DC-DC boost converting device and boost conversion method of work thereof | |
| CN202205077U (en) | Self-adaptive PID (Proportion Integration Differentiation) control system applied to active front end | |
| CN105720891A (en) | Photovoltaic water pump system with super-frequency control device and super-frequency control method of photovoltaic water pump system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20171127 Address after: 201615 Shanghai, Songjiang District, No. nine new road, No. 99 Patentee after: Yungtay elevator equipment Co., Ltd. (China) Address before: 201615 Shanghai city Songjiang District town Jiuting Yaohan Road No. 77 Patentee before: Shanghai GIE EM Co., Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190731 Address after: 201615 Shanghai city Songjiang District town Jiuting Yaohan Road No. 77 Patentee after: Shanghai GIE EM Co., Ltd. Address before: 201615 Shanghai, Songjiang District, No. nine new road, No. 99 Patentee before: Yungtay elevator equipment Co., Ltd. (China) |
|
| TR01 | Transfer of patent right |