CN2834014Y

CN2834014Y - Energy-saving drive controller for elevator

Info

Publication number: CN2834014Y
Application number: CNU2005200604351U
Authority: CN
Inventors: 陈国丰; 梁东明; 周云翔; 吴俊杰
Original assignee: Guangzhou Hitachi Elevator Co Ltd
Current assignee: Hitachi Elevator China Co Ltd
Priority date: 2005-06-28
Filing date: 2005-06-28
Publication date: 2006-11-01
Anticipated expiration: 2015-06-28

Abstract

The utility model discloses an energy-saving drive controller for an elevator, which is composed of a three-phase power supply, a wave filter, a frequency changer and a drawing ac motor. The utility model is characterized in that the frequency changer is an alternating current-alternating current converter, and a phase lack protection circuit is connected between the three-phase power supply and the wave filter. The utility model has superior AC-AC converting performance, the higher harmonic of the power supply does not have, a power supply back-feed function of no harmonic pollution is realized, and the utility model can be in the continuous operation with low speed. The purposes of electric force environmental protection, energy saving and the reduction of the installing volume of an elevator machine room are obtained.

Description

The energy-conservation driving governor of a kind of elevator

Technical field

The utility model belongs to the technical field of elevator drive, particularly relates to the energy-conservation driving governor of a kind of elevator.

Background technology

Along with rapid economic development of China, the city of domestic economy prosperity, enter the construction ranks of international metropolis one after another, the city expansion, high-rise, high-rise building are constantly built, need high speed, ultrahigh speed, big capacity elevator supporting with it, along with the demand of express elevator increasing, the control mode of express elevator is also had higher requirement.The control mode of express elevator mainly contains two kinds at present: 1) the DC control direct current machine of frequency conversion; 2) adopt AC-DC-AC converter technology control alternating current machine; 3) variable frequency control of employing three-phase active prime.For first kind of control mode, adopt the DC control of the frequency conversion of AC-DC, use direct current machine as driving, the carbon brush of direct current machine damages easily, and maintenance difficulties is higher, and reliability is not high; For second kind of control mode, adopt AC-DC-AC converter technology, the regenerated energy that elevator produces drives the regeneration resistance consumption by brake unit, and for the elevator of low speed and little carrying capacity, this method is feasible, but at a high speed big carrying capacity elevator, regenerated energy is very huge (10～20KW even bigger), if by resistance consumption, both wasted the energy, produce a large amount of heating consumption again, influenced environment; For the third control mode, adopt the variable frequency control of three-phase active prime, it is AC-DC-AC converter mode that prime adopts controlled rectifier, energy back telegram in reply net with regeneration, this mode easily produces the pollution of harmonic wave to electrical network, need increase the shaping that big inductance carries out waveform by front end, be difficult to reach ideal effect.

Summary of the invention

The purpose of this utility model is exactly in order to save the energy, reduce the pollution of prior art to environment, provide a kind of elevator energy-conservation driving governor, matrix frequency converter AC-AC Application of frequency conversion technique in the control of express elevator, has very superior AC-AC property, the non-transformer high order harmonic component has realized the power supply feedback function of no-harmonic wave pollution, but and low speed operation and the control of d-q shaft current continuously.

The technical solution of the utility model is achieved in that the energy-conservation driving governor of a kind of elevator; form by three phase mains, filter, frequency converter, traction alternating current machine; it is characterized in that: described frequency converter is the AC-AC frequency converter, and is connected with open-phase protection circuit between three phase mains and filter.

Described AC-AC frequency converter is matrix frequency converter or matrix form power converter.

Described filter is single-stage or multistage LC filter.

Advantage of the present utility model is: have very superior property, do not produce harmonic pollution, overcome of the pollution of the regenerated energy of elevator generation to electrical network generation harmonic wave, reduce the elevator(lift) machine room installation volume, overall performance is higher than the variable frequency control of three-phase active prime and adopts the AC-DC of multiple technology-AC converter control, in countries in the world growing interest sustainable development, carry out today of power environment protection, green power supply energetically, its application has realistic meaning, is following extremely rising product.

Description of drawings

Accompanying drawing 1 is an operation principle schematic diagram of the present utility model;

Accompanying drawing 2 is the control circuits in the utility model open-phase protection circuit;

Accompanying drawing 3 is AC-DC-AC converter technology Control work principle schematic of prior art;

Accompanying drawing 4 is test mode of operation figure;

Accompanying drawing 5 is energy consumption comparison diagrams of the utility model and prior art embodiment one;

Accompanying drawing 6 is year electricity charge comparison diagrams of the utility model and prior art embodiment one;

Accompanying drawing 7 is weight and volume schematic diagrames of prior art embodiment one frequency converter part;

Accompanying drawing 8 is weight and volume schematic diagrames of the utility model frequency converter part;

Accompanying drawing 9 is in the prior art.Adopt the variable frequency control operation principle schematic diagram of three-phase active prime;

Accompanying drawing 10 is the phase voltage of prior art embodiment two, the input oscillogram of phase current;

Accompanying drawing 11 is the phase voltage of prior art embodiment two, the output waveform figure of phase current;

Accompanying drawing 12 is input oscillograms of phase voltage of the present utility model, phase current;

Accompanying drawing 13 is output waveform figures of phase voltage of the present utility model, phase current;

In the accompanying drawing:

The 1st, open-phase protection circuit;

The 2nd, filter;

The 3rd, the AC-AC frequency converter;

The 4th, the control circuit in the open-phase protection circuit;

The 5th, the main circuit contact device line bag in the open-phase protection circuit;

5A is the main circuit contact device normally opened contact in the open-phase protection circuit;

The 6th, AC-DC-AC converter;

The 7th, the AC-DC-AC converter of employing three-phase active prime;

Below by accompanying drawing prior art and embodiment of the present utility model are further described:

Embodiment

Accompanying drawing 1 is an operation principle schematic diagram of the present utility model; three phase mains er; es; et is input to open-phase protection circuit 1; open-phase protection circuit 1 is to cause voltage or electric current too high in order to prevent the power supply phase shortage; matrix frequency converter 3 is caused damage; phase shortage control circuit 4 wherein detects three phase mains er; es; whether et phase shortage; if three phase mains er; es; et does not have phase shortage; phase shortage control circuit 4 output K1; the K3 closure; make contactor line bag 5 energisings on the control main circuit; main contacts 5A moves closed; connect main circuit; normal three phase mains carries out filtering through LC filter 2; filter 2 can adopt single-stage or multistage LC filter; mainly be in order to absorb the switching frequency harmonic wave in matrix frequency converter 3 input currents; after the three phase mains filtering; be input to the three-phase input end of matrix frequency converter 3; matrix frequency converter 3 is a kind of inner alternating current direct voltage changers that adopt two-way gate-controlled switch to be the matrix form arrangement; adopt the PWM control method; its inside does not contain any passive component; basic purpose is exactly to adopt suitable control algolithm that three-phase input voltage is converted to the adjustable three-phase output voltage of first-harmonic width of cloth phase frequency; transmission power supply as traction motor M; thereby the operation of control motor; because matrix frequency converter 3 is to adopt two-way gate-controlled switch; can realize the energy two-way flow; be convenient to motor and realize four quadrant running, output voltage amplitude and frequency wide region are adjustable continuously.Matrix frequency converter 3 can the unit's of realization input power factor, and irrelevant with load impedance characteristic; Can improve the Electro Magnetic Compatibility of converter inside after realization power is integrated, the PWM voltage characteristics of its output and adjustable input power factor can improve the Electro Magnetic Compatibility between motor, converter and the power supply; Simple in structure, no energy-storage travelling wave tube is convenient to integratedly, and energy density is big, transmits the energy efficiency height.Therefore, matrix frequency converter 3 has very superior property, during elevator brake, can carry out reactive power compensation to electrical network when itself not producing harmonic pollution, has saved the energy.

Accompanying drawing 2. is the control circuits 4 in the utility model open-phase protection circuit, its input input three phase mains er, es, et, when three phase mains er, es, et balance, phase shortage control circuit 4 output K1, K3 closure, make the contactor line bag energising on the control main circuit, main contacts 5A moves closed, and main circuit is connected; When three phase mains er, es, et phase shortage, phase shortage control circuit 4 output K1, K3 disconnect, the contactor line bag no power on the control main circuit, and main contacts 5A disconnects, and main circuit disconnects; Like this, guaranteed effectively that just main circuit works under the situation of normal input power supply, thereby protected matrix frequency converter not to be damaged.

Prior art embodiment one:

Accompanying drawing 3 is AC-DC-AC converter technology Control work principle schematic of prior art, three phase mains er, es, et are input to frequency converter 6, at first, alternating current is become direct current, be input to the inversion part again through its inner rectifying part, be transformed into the alternating current that has changed supply frequency, output to traction motor M, thus the operation of control motor, during elevator brake, the regenerated energy that produces drives by brake unit, consumes by external regeneration resistance R.

We have carried out the energy consumption test to the utility model accompanying drawing 1, prior art accompanying drawing 3, and experimental condition is as follows:

Rated load 1150kg motor 16kw 174rpm

Car load 1200kg motor power (output) 0.95kw

To heavy load 1775kg actuator power

Elevator speed 150m/min AC-DC-AC converter 0.95kw

Acceleration 0.8m/sec ²Matrix frequency converter 0.97kw

One day average operation week issue 500 times

The operation week issue that converted 1 year 182,500 times

0.61 yuan/kwh of the electricity charge

Operational mode such as Fig. 4.

Fig. 5 is the energy consumption comparison diagram of the utility model embodiment Fig. 1 and a cycle of operation of prior art embodiment Fig. 3, and Fig. 6 then is that their the year electricity charge are compared.Move from one-period, the average power consumption of prior art is 6.52kw, and average power consumption of the present utility model is 2.47kw, and energy-saving effect reaches 62%, 6,013 yuan of year saving electricity charge.

We are more once weight and the volume of accompanying drawing 3, accompanying drawing 1 embodiment again.

Accompanying drawing 7 is weight and volumes of accompanying drawing 3 embodiment, critical piece has: AC-DC-AC converter of 400V, 22KW, and brake unit, resistor, calculate with our present employed specification, the weight of frequency converter is 44Kg, and the weight of brake unit is 1.8Kg, and the weight of resistor is 50Kg, its total weight is 95.8Kg, and cumulative volume is about 0.1177m ³

Accompanying drawing 8 is weight and volumes of accompanying drawing 1 embodiment, and critical piece has: the matrix frequency converter of 400V, 22KW, to calculate with our present employed specification, and its total weight is 30Kg, cumulative volume is 0.0395m ³

Through above comparison, the utility model embodiment has all reduced 2/3 than prior art embodiment on total weight and cumulative volume, and this carries out small room or do not have the machine room technology present elevator industry undoubtedly, and very realistic meanings is arranged.

Prior art embodiment two:

Accompanying drawing 9 is variable frequency control operation principle schematic diagrames of available technology adopting three-phase active prime, three phase mains e is input to frequency converter 7, at first through its inner controlled rectification part, alternating current is become direct current, be input to the inversion part again, be transformed into the alternating current that has changed supply frequency, output to traction motor M, thereby the operation of control motor, during elevator brake, because the inversion of frequency converter 7 inside part and controlled rectification partly are two-way, the regenerated energy of generation is by the mode of AC-DC-interchange, inversion is and the synchronous alternating current of electrical network same frequency, feeds back to electrical network.

Accompanying drawing 10 is the phase voltage of this prior art embodiment Fig. 9 and the input waveform of phase current;

Accompanying drawing 11 is the phase voltage of this prior art embodiment Fig. 9 and the output waveform of phase current;

Accompanying drawing 12 is the phase voltage of the utility model Fig. 1 and the input waveform of phase current;

Accompanying drawing 13 is the phase voltage of the utility model Fig. 1 and the output waveform of phase current;

Difference comparative drawings figs 12 and accompanying drawing 10, accompanying drawing 13 and accompanying drawing 11, as can be seen, aspect the phase voltage and phase current of input, outlet side, obviously than the reduction that had of prior art, this has very large help for energy saving of system to high order harmonic component composition of the present utility model.

Above description is certain embodiments of the present utility model, the present utility model is not limited only to the specific structure of above diagram or description, and claim will cover all changes scheme in connotation of the present utility model and the scope.

Claims

1, the energy-conservation driving governor of a kind of elevator is made up of three phase mains, filter, frequency converter, traction alternating current machine, it is characterized in that: described frequency converter is the AC-AC frequency converter, and is connected with open-phase protection circuit between three phase mains and filter.

2, the energy-conservation driving governor of a kind of elevator according to claim 1 is characterized in that: described AC-AC frequency converter is matrix frequency converter or matrix form power converter.

3, the energy-conservation driving governor of a kind of elevator according to claim 1 is characterized in that: described filter is single-stage or multistage LC filter.