CN201113403Y - Elevator large power electronic energy-saving apparatus - Google Patents
Elevator large power electronic energy-saving apparatus Download PDFInfo
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- CN201113403Y CN201113403Y CNU2007200746597U CN200720074659U CN201113403Y CN 201113403 Y CN201113403 Y CN 201113403Y CN U2007200746597 U CNU2007200746597 U CN U2007200746597U CN 200720074659 U CN200720074659 U CN 200720074659U CN 201113403 Y CN201113403 Y CN 201113403Y
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Abstract
The utility model relates to the electronics and information and energy multidisciplinary technical field, in particular to an elevator high-power energy electronic saving device which adopts the modern means of science and is mainly used for realizing the low energy consumption. The device comprises a filter, a frequency transformator, a motor and a logic circuit, etc. and at least comprises a logic protecting module, a singlechip controller, an elevator regenerating DC power, an IGBT contravariant bridge and an electronic energy saving device of a contravariant synchronizing circuit formed by an AC network. The utility model mainly solves the technical problem of how to feedback the motor output energy in the operation of the frequency control elevator in the state of the motor generating electricity to the electric network. The elevator high-power energy electronic saving device has the advantages that the modern power electronics, the control technique and the computer technique are adopted to realize the feedback of the elevator system regenerating energy to the AC network, the protections of overvoltage, overcurrent and overheat of the system can be performed and the device has simple and convenient as well as effective control, etc.
Description
Technical field
The utility model relates to a kind of electronics, information, the multi-disciplinary technical field of the energy, refers to a kind of modern means of science and technology of utilizing especially, is mainly used in the elevator high-power electric energy-saving device of the high-tech technical products of realizing elevator energy-saving.
Background technology
At present, in the elevator operation control system, nearly all at the speed-regulating tool that uses the ac-dc-ac inverter device as drive motors.This class transducer power factor height, efficient height, precision height, speed-regulating range width are so obtain extensive use.Variable-frequency control technique relates to a plurality of ambits such as electronics, electrician, information and control.Adopting variable-frequency control technique is the important channel of saving energy and reduce the cost, improving control performance, improving the quality of products, and has obtained good effect and remarkable economic efficiency in application.But, aspect the operation and control of elevator, the problem that also exists further excavation frequency conversion speed-adjusting system energy-saving potential and raise the efficiency.Two important channels have been addressed this problem.The one, take a kind of control strategy to make the loss of variable frequency drive motors minimum and most effective; The 2nd, utilize a kind of technological means to make the manufacturing machine energy stored in time feed back to electrical network efficiently.First problem can realize " energy-on-demand " by variable-frequency control technique and optimal control technology thereof, promptly under the prerequisite that satisfies manufacturing machine speed, torque and dynamic response requirement, reduces the intake of converter plant as far as possible; Second problem can will be stored in the Way of Regenerating Energy Feedback of frequency converter DC side to AC network by the active inversion device.What this patent related to is second problem---the ac-dc-ac frequency control lift energy feedback control technology of frequency control elevator energy-saving control.
The problem that frequency-changing elevator exists in application is:
Universal frequency converter mostly is the voltage-type ac-dc-ac frequency converter.The principle of this class frequency converter is, three-phase alternating current is not at first controlled rectifier bridge through diode and obtained Rectified alternating current, again through the electrochemical capacitor filtering voltage regulation, after the alternating current of active inversion output voltage, frequency adjustable power to motor.But universal frequency converter can not be directly used in and need rise fast, brake and the governing system of frequent forward and backward, again can not be with the electric energy feedback grid of electric power generation state generation.Because this system requirements motor four quadrant running, when deceleration of elevator, braking and ascending for elevator, motor is in regenerative power generation state.Because the control rectifier power transfer is not irreversible for the diode of frequency converter, the regenerative electric energy of generation is transferred on the DC side filter capacitor, produces the pump up voltage.Too high pump up voltage might damage switching device, electrochemical capacitor, even can destroy the insulation of motor, thereby threaten system safety work, can only consume the form of this part energy by energy consumption resistance at present with heat energy, because resistance heating is serious, and the functional reliability of system, stability are adversely affected.
Domestic and international lift energy feedback technical research present situation:
Be in the regenerated energy that regenerative power generation state produces in order to solve elevator, Siemens has been released the voltage-type ac-dc-ac frequency converter of motor four quadrant running, and states such as Japan, Canada have also successfully developed the power supply regenerative device.Simultaneously, seen the development report that four-quadrant voltage-type ac-dc-ac frequency converter and grid side pulse rectifier etc. are arranged abroad.Ubiquitous problem is that these devices cost an arm and a leg, and it is very high to the requirement of electrical network to add some products, is not suitable for the national conditions of China.The domestic dynamic braking mode that mostly adopts in medium and small capacity system, promptly realize the four quadrant running of motor though this method is simple, following critical defect being arranged by the built-in or method that adds brake resistance with power consumption in Power Resistor:
(1) the waste energy reduces system effectiveness.(2) resistance heating is serious, influences other part operate as normal of system.(3) simple dynamic braking can not in time suppress the pump up voltage that fast braking produces sometimes, has limited the raising of braking ability.
The report of domestic existing hydraulic elevator energy conserving system, and utilize energy feedback control technology to realize that the research of elevator energy-saving is fewer.Do not see the report of practical product as yet about the research of lift energy feedback electric energy-saving aspect.
Summary of the invention
In order to overcome above-mentioned weak point; it is that object is directly controlled with grid line voltage that main purpose of the present utility model aims to provide a kind of; the frequency converter dc voltage is through changing as the control circuit power supply; the power inverting controller that adopts has six IGBT of three brachium pontis (Insulated Gate Bipolar Transistor; insulated gate bipolar transistor) forms; and adopt a slice 89C52 single-chip microcomputer to produce inverter control signal and carry out system's overvoltage; overcurrent; overheated safeguard protection, again can be with the elevator high-power electric energy-saving device of elevator regenerated electric energy feedback AC network.
The technical problems to be solved in the utility model is: how mainly to solve the technical problem of motor output energy feedback grid under the frequency control elevator electric power generation state in service, how to utilize modern power electronics technology, control technology, computer technology to realize the relevant technologies problems such as feedback of elevator device regenerated energy to AC network.
The technical scheme that its technical problem that solves the utility model adopts is: this device is made up of parts such as filter, rectifier, frequency converter, motor, power supply, logical circuit and single-chip microcomputers, and this device comprises at least:
Logic protection module, singlechip controller, elevator regenerated DC power supply, insulated gate bipolar transistor IGBT inverter bridge, AC network and synchronous detection module are combined as the electric energy-saving device of an inversion synchronous circuit;
The output of one logic protection module is connected with the input of singlechip controller module, the output of singlechip controller module is connected with the input of insulated gate bipolar transistor IGBT inverter bridge module, one output of insulated gate bipolar transistor IGBT inverter bridge module is connected with the input of logic protection module, and another output is connected with the input of AC network module;
The output of one elevator regenerated DC power supplier is connected with the input of insulated gate bipolar transistor IGBT inverter bridge module;
The output of one AC network module is connected with the input of singlechip controller module after via synchronous detection module.
The input signal of the computer control of the singlechip controller of described elevator high-power electric energy-saving device and virtual protection circuit has three-phase synchronous signal and over-current over-voltage protection signal; output signal is the control signal of turn-on and turn-off of six IGBT of inverter controller, wherein:
Second pin of the road AND A of the pin P1.0 of singlechip controller is connected, and a road the 3rd pin through inverter AND A of the pin P1.1 of singlechip controller is connected, and first pin of NOR gate A is connected with the overcurrent protection end;
Second pin of another road AND B of the pin P1.1 of singlechip controller is connected, and another road of the pin P1.0 of singlechip controller is connected through the 3rd pin of inverter AND B, and first pin of NOR gate B is connected with the overcurrent protection end;
Second pin of the road AND C of the pin P1.2 of singlechip controller is connected, another road is connected through the 3rd pin of inverter AND D, a road the 3rd pin through inverter AND C of the pin P1.3 of singlechip controller is connected, and first pin of NOR gate C is connected with the overcurrent protection end;
Second pin of another road AND D of the pin P1.3 of singlechip controller is connected, and another road of the pin P1.2 of singlechip controller is connected through the 3rd pin of inverter AND D, and first pin of NOR gate D is connected with the overcurrent protection end;
Second pin of the road AND E of the pin P1.4 of singlechip controller is connected, another road is connected through the 3rd pin of inverter AND F, a road the 3rd pin through inverter AND E of the pin P1.5 of singlechip controller is connected, and first pin of NOR gate E is connected with the overcurrent protection end;
Second pin of the road AND F of the pin P1.5 of singlechip controller is connected, another road is connected through the 3rd pin of inverter AND E, another road of the pin P1.4 of singlechip controller is connected through the 3rd pin of inverter AND F, and first pin of NOR gate F is connected with the overcurrent protection end;
The output of NOR gate A, NOR gate B, NOR gate C, not gate D, NOR gate E and NOR gate F all is connected with the base stage of each insulated gate bipolar transistor respectively through inverter, is the control signal of computer output.
The AB phase line voltage of the insulated gate bipolar transistor IGBT inverter bridge of described elevator high-power electric energy-saving device is connected with IGBT insulated gate bipolar transistor T1, T2, T3, T4 respectively; Begin to make T1, T4 conducting constantly in AB phase line voltage 60 degree phase places, AB phase line voltage 120 degree phase places make T1, T4 end constantly; AB phase line voltage 240 degree phase places make T2, T3 conducting constantly, and AB phase line voltage 300 degree phase places make T2, T3 end constantly;
The BC phase line voltage of described insulated gate bipolar transistor IGBT inverter bridge is connected with IGBT insulated gate bipolar transistor T3, T4, T5, T6 respectively; Begin to make T3, T6 conducting constantly in BC phase line voltage 60 degree phase places, BC phase line voltage 120 degree phase places make T3, T6 end constantly; BC phase line voltage 240 degree phase places make T4, T5 conducting constantly, and BC phase line voltage 300 degree phase places make T4, T5 end constantly;
The CA phase line voltage of described insulated gate bipolar transistor IGBT inverter bridge is connected with IGBT insulated gate bipolar transistor T5, T6, T1, T2 respectively; Begin to make T5, T2 conducting constantly in CA phase line voltage 60 degree phase places, CA phase line voltage 120 degree phase places make T5, T2 end constantly; CA phase line voltage 240 degree phase places make T6, T1 conducting constantly, and CA phase line voltage 300 degree phase places make T6, T1 end constantly.
The singlechip controller of described elevator high-power electric energy-saving device is a slice 51 serial chip microprocessor 89C52.
The beneficial effects of the utility model are: this device solves the technical problem of motor output energy feedback grid under the frequency control elevator electric power generation state in service; modern power electronics technology, control technology, computer technology have been utilized; realize of the feedback of elevator device regenerated energy to AC network; and carry out system's overvoltage, overcurrent, overheated safe protection, have the simple and direct advantage such as effectively of control.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Accompanying drawing 1 is the integrally-built circuit block diagram of the utility model;
Accompanying drawing 2 is the utility model computer control and virtual protection circuit theory diagrams;
Accompanying drawing 3 is the utility model inverter bridge circuit theory diagrams;
Label declaration in the accompanying drawing:
The 1-virtual protection;
The 2-singlechip controller;
The elevator regenerated DC power supply of 3-;
4-insulated gate bipolar transistor IGBT inverter bridge;
The 5-AC network;
The 6-synchronous detecting;
The 10-overcurrent protection;
20-NOR gate A;
21-NOR gate B;
22-NOR gate C;
23-NOR gate D;
24-NOR gate E;
25-NOR gate F
Embodiment
See also shown in the accompanying drawing 1,2,3, the utility model is made up of parts such as filter, rectifier, frequency converter, motor, power supply, logical circuit and single-chip microcomputers, and this device comprises at least:
The output of one virtual protection, 1 module is connected with the input of singlechip controller 2 modules, the output of singlechip controller 2 modules is connected with the input of insulated gate bipolar transistor IGBT inverter bridge 4 modules, one output of insulated gate bipolar transistor IGBT inverter bridge 4 modules is connected with the input of virtual protection 1 module, and another output is connected with the input of AC network 5 modules;
The output of one elevator regenerated DC power supply 3 modules is connected with the input of insulated gate bipolar transistor IGBT inverter bridge 4 modules;
The output of one AC network, 5 modules is connected with the input of singlechip controller 2 modules after via synchronous detecting 6 modules.
The computer control of the singlechip controller 2 of described elevator high-power electric energy-saving device and the input signal of virtual protection circuit have three-phase synchronous signal and over-current over-voltage protection signal; output signal is the control signal of turn-on and turn-off of six IGBT of inverter controller, wherein:
Second pin of the road AND A20 of the pin P1.0 of singlechip controller 2 is connected, a road the 3rd pin through inverter AND A20 of the pin P1.1 of singlechip controller 2 is connected, and first pin of NOR gate A20 is connected with overcurrent protection 10 ends;
Second pin of another road AND B21 of the pin P1.1 of singlechip controller 2 is connected, another road of the pin P1.0 of singlechip controller 2 is connected through the 3rd pin of inverter AND B21, and first pin of NOR gate B21 is connected with overcurrent protection 10 ends;
Second pin of the road AND C22 of the pin P1.2 of singlechip controller 2 is connected, another road is connected through the 3rd pin of inverter AND D23, a road the 3rd pin through inverter AND C22 of the pin P1.3 of singlechip controller 2 is connected, and first pin of NOR gate C22 is connected with overcurrent protection 10 ends;
Second pin of another road AND D23 of the pin P1.3 of singlechip controller 2 is connected, another road of the pin P1.2 of singlechip controller 2 is connected through the 3rd pin of inverter AND D23, and first pin of NOR gate D23 is connected with overcurrent protection 10 ends;
Second pin of the road AND E24 of the pin P1.4 of singlechip controller 2 is connected, another road is connected through the 3rd pin of inverter AND F25, a road the 3rd pin through inverter AND E24 of the pin P1.5 of singlechip controller 2 is connected, and first pin of NOR gate E24 is connected with overcurrent protection 10 ends;
Second pin of the road AND F25 of the pin P1.5 of singlechip controller 2 is connected, another road is connected through the 3rd pin of inverter AND E24, another road of the pin P1.4 of singlechip controller 2 is connected through the 3rd pin of inverter AND F25, and first pin of NOR gate F25 is connected with overcurrent protection 10 ends;
The output of NOR gate A20, NOR gate B21, NOR gate C22, not gate D23, NOR gate E24 and NOR gate F25 all is connected with the base stage of each insulated gate bipolar transistor respectively through inverter, is the control signal of computer output.
The AB phase line voltage of the insulated gate bipolar transistor IGBT inverter bridge 4 of described elevator high-power electric energy-saving device is connected with IGBT insulated gate bipolar transistor T1, T2, T3, T4 respectively; Begin to make T1, T4 conducting constantly in AB phase line voltage 60 degree phase places, AB phase line voltage 120 degree phase places make T1, T4 end constantly; AB phase line voltage 240 degree phase places make T2, T3 conducting constantly, and AB phase line voltage 300 degree phase places make T2, T3 end constantly;
The BC phase line voltage of described insulated gate bipolar transistor IGBT inverter bridge 4 is connected with IGBT insulated gate bipolar transistor T3, T4, T5, T6 respectively; Begin to make T3, T6 conducting constantly in BC phase line voltage 60 degree phase places, BC phase line voltage 120 degree phase places make T3, T6 end constantly; BC phase line voltage 240 degree phase places make T4, T5 conducting constantly, and BC phase line voltage 300 degree phase places make T4, T5 end constantly;
The CA phase line voltage of described insulated gate bipolar transistor IGBT inverter bridge 4 is connected with IGBT insulated gate bipolar transistor T5, T6, T1, T2 respectively; Begin to make T5, T2 conducting constantly in CA phase line voltage 60 degree phase places, CA phase line voltage 120 degree phase places make T5, T2 end constantly; CA phase line voltage 240 degree phase places make T6, T1 conducting constantly, and CA phase line voltage 300 degree phase places make T6, T1 end constantly.
The singlechip controller 2 of described elevator high-power electric energy-saving device is a slice 51 serial chip microprocessor 89C52.
Operation principle of the present utility model is:
Elevator is in running, because of the elevator device counterweight, deceleration during operation, braking, it is consumed power not that half the time is arranged approximately, the kinetic energy of elevator, potential energy are converted to power storage in the dc bus capacitor of frequency converter by motor, and this part energy normally is converted into thermal waste by energy consumption resistance and falls; The utility model successfully utilizes this part energy from newly sending electrical network back to again.
The power inverting controller that the utility model adopts has six IGBT of three brachium pontis (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) and forms.Input signal is the control signal from singlechip controller, and its output links to each other with the three-phase ac power cord of AC network respectively.Be A, B, the C three-phase of three-phase alternating current electrical network, whenever link to each other with an IGBT brachium pontis respectively mutually.Six IGBT take turns conducting every certain angle, convert direct current to the per second alternating current in 50 weeks, send electrical network then back to.
The input signal of synchronous circuit is the line voltage of three phase network, converts pulse signal to through detecting translation circuit, gives singlechip controller with this pulse signal then, realizes that the inversion three-phase alternating voltage is identical with the phase place of electrical network three-phase alternating voltage.
Singlechip controller of the present utility model adopts a slice 51 serial chip microprocessor 89C52, add the logical circuit forming control system, to inverter bridge IGBT (Insulated GateBipolar Transistor, insulated gate bipolar transistor) controls, make its requiring conducting and close according to the rules, finish the inversion of direct voltage to three-phase alternating voltage.The input signal of singlechip controller 2 has three-phase synchronous signal and over-current over-voltage protection signal, and output signal is the control signal of turn-on and turn-off of six IGBT of inverter controller.Produce three-phase alternating voltage control signal sequence by singlechip controller, and produce the system protection signal.
The input signal of virtual protection circuit is IGBT (Insulated Gate BipolarTransistor; insulated gate bipolar transistor) overcurrent, overvoltage and heat alarm; these signals are sent to singlechip controller through after the protective circuit, and single-chip microcomputer output protection control signal is blocked the conducting of inverter controller.
See also shown in the accompanying drawing 2,3, illustrate:
1). among Fig. 2,1., 2., 3., 4., 5., the control signal of 6. exporting for computer, deliver to respectively among Fig. 3 1., 2., 3., 4., 5., 6. number IGBT (InsulatedGate Bipolar Transistor, insulated gate bipolar transistor) high power transistor.
2). Ud is frequency converter DC side regeneration direct voltage among Fig. 3.
3). A, B, C connect AC network A phase, B phase, C phase three-phase voltage respectively among Fig. 3.
System of the present utility model characteristics:
1). this utility model can be with elevator regenerated electric energy feedback AC network;
2). adopt a slice 89C52 single-chip microcomputer generation inverter control signal and carry out the guarantor of system Protect;
3). directly control take grid line voltage as object;
4). the frequency converter dc voltage is through changing as the control circuit power supply;
5). have overvoltage, overcurrent, overheated safeguard protection.
Claims (4)
1, a kind of elevator high-power electric energy-saving device, this device has filter, rectifier, frequency converter, motor, power supply, logical circuit and single-chip microcomputer, it is characterized in that: this device comprises at least:
Virtual protection (1) module, singlechip controller (2), elevator regenerated DC power supply (3), insulated gate bipolar transistor IGBT inverter bridge (4), AC network (5) and synchronous detecting (6) module combinations are the electric energy-saving device of an inversion synchronous circuit;
The output of one virtual protection (1) module is connected with the input of singlechip controller (2) module, the output of singlechip controller (2) module is connected with the input of insulated gate bipolar transistor IGBT inverter bridge (4) module, one output of insulated gate bipolar transistor IGBT inverter bridge (4) module is connected with the input of virtual protection (1) module, and another output is connected with the input of AC network (5) module;
The output of one elevator regenerated DC power supply (3) module is connected with the input of insulated gate bipolar transistor IGBT inverter bridge (4) module;
The output of one AC network (5) module is connected with the input of singlechip controller (2) module after via synchronous detecting (6) module.
2, elevator high-power electric energy-saving device according to claim 1; it is characterized in that: the computer control of described singlechip controller (2) and the input signal of virtual protection circuit have three-phase synchronous signal and over-current over-voltage protection signal; output signal is the control signal of turn-on and turn-off of six IGBT of inverter controller, wherein:
Second pin of the road AND A (20) of the pin P1.0 of singlechip controller (2) is connected, a road the 3rd pin through inverter AND A (20) of the pin P1.1 of singlechip controller (2) is connected, and first pin of NOR gate A (20) is connected with overcurrent protection (10) end;
Second pin of another road AND B (21) of the pin P1.1 of singlechip controller (2) is connected, another road of the pin P1.0 of singlechip controller (2) is connected through the 3rd pin of inverter AND B (21), and first pin of NOR gate B (21) is connected with overcurrent protection (10) end;
Second pin of the road AND C (22) of the pin P1.2 of singlechip controller (2) is connected, another road is connected through the 3rd pin of inverter AND D (23), a road the 3rd pin through inverter AND C (22) of the pin P1.3 of singlechip controller (2) is connected, and first pin of NOR gate C (22) is connected with overcurrent protection (10) end;
Second pin of another road AND D (23) of the pin P1.3 of singlechip controller (2) is connected, another road of the pin P1.2 of singlechip controller (2) is connected through the 3rd pin of inverter AND D (23), and first pin of NOR gate D (23) is connected with overcurrent protection (10) end;
Second pin of the road AND E (24) of the pin P1.4 of singlechip controller (2) is connected, another road is connected through the 3rd pin of inverter AND F (25), a road the 3rd pin through inverter AND E (24) of the pin P1.5 of singlechip controller (2) is connected, and first pin of NOR gate E (24) is connected with overcurrent protection (10) end;
Second pin of the road AND F (25) of the pin P1.5 of singlechip controller (2) is connected, another road is connected through the 3rd pin of inverter AND E (24), another road of the pin P1.4 of singlechip controller (2) is connected through the 3rd pin of inverter AND F (25), and first pin of NOR gate F (25) is connected with overcurrent protection (10) end;
The output of NOR gate A (20), NOR gate B (21), NOR gate C (22), not gate D (23), NOR gate E (24) and NOR gate F (25) all is connected with the base stage of each insulated gate bipolar transistor respectively through inverter, is the control signal of computer output.
3, elevator high-power electric energy-saving device according to claim 1 is characterized in that: the AB phase line voltage of described insulated gate bipolar transistor IGBT inverter bridge (4) is connected with IGBT insulated gate bipolar transistor T1, T2, T3, T4 respectively; Begin to make T1, T4 conducting constantly in AB phase line voltage 60 degree phase places, AB phase line voltage 120 degree phase places make T1, T4 end constantly; AB phase line voltage 240 degree phase places make T2, T3 conducting constantly, and AB phase line voltage 300 degree phase places make T2, T3 end constantly;
The BC phase line voltage of described insulated gate bipolar transistor IGBT inverter bridge (4) is connected with IGBT insulated gate bipolar transistor T3, T4, T5, T6 respectively; Begin to make T3, T6 conducting constantly in BC phase line voltage 60 degree phase places, BC phase line voltage 120 degree phase places make T3, T6 end constantly; BC phase line voltage 240 degree phase places make T4, T5 conducting constantly, and BC phase line voltage 300 degree phase places make T4, T5 end constantly;
The CA phase line voltage of described insulated gate bipolar transistor IGBT inverter bridge (4) is connected with IGBT insulated gate bipolar transistor T5, T6, T1, T2 respectively; Begin to make T5, T2 conducting constantly in CA phase line voltage 60 degree phase places, CA phase line voltage 120 degree phase places make T5, T2 end constantly; CA phase line voltage 240 degree phase places make T6, T1 conducting constantly, and CA phase line voltage 300 degree phase places make T6, T1 end constantly.
4, elevator high-power electric energy-saving device according to claim 1 is characterized in that: described singlechip controller (2) is a slice 51 serial chip microprocessor 89C52.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200746597U CN201113403Y (en) | 2007-09-13 | 2007-09-13 | Elevator large power electronic energy-saving apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200746597U CN201113403Y (en) | 2007-09-13 | 2007-09-13 | Elevator large power electronic energy-saving apparatus |
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| CN201113403Y true CN201113403Y (en) | 2008-09-10 |
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| CNU2007200746597U Expired - Fee Related CN201113403Y (en) | 2007-09-13 | 2007-09-13 | Elevator large power electronic energy-saving apparatus |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101950978A (en) * | 2010-09-03 | 2011-01-19 | 合肥联信电源有限公司 | Energy-saving emergency type elevator feedback power system |
| CN101895214B (en) * | 2009-05-20 | 2012-06-13 | 深圳市英威腾电气股份有限公司 | Three-phase synchronous rectification circuit and control method thereof |
| CN101746656B (en) * | 2008-12-16 | 2014-06-11 | 中国建筑科学研究院建筑机械化研究分院 | Elevator regenerated electricity utilizing system |
-
2007
- 2007-09-13 CN CNU2007200746597U patent/CN201113403Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101746656B (en) * | 2008-12-16 | 2014-06-11 | 中国建筑科学研究院建筑机械化研究分院 | Elevator regenerated electricity utilizing system |
| CN101895214B (en) * | 2009-05-20 | 2012-06-13 | 深圳市英威腾电气股份有限公司 | Three-phase synchronous rectification circuit and control method thereof |
| CN101950978A (en) * | 2010-09-03 | 2011-01-19 | 合肥联信电源有限公司 | Energy-saving emergency type elevator feedback power system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080910 Termination date: 20100913 |