CN101340106B - Power supply system of elevator - Google Patents
Power supply system of elevator Download PDFInfo
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- CN101340106B CN101340106B CN2008101319790A CN200810131979A CN101340106B CN 101340106 B CN101340106 B CN 101340106B CN 2008101319790 A CN2008101319790 A CN 2008101319790A CN 200810131979 A CN200810131979 A CN 200810131979A CN 101340106 B CN101340106 B CN 101340106B
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention provides a power supply system for an elevator. The power supply system for an elevator includes: an inverter device (111) which inverts sine-wave power supplied from an industrial power source (101) to a rectangular wave to output; a storage battery (113) which stores power of the industrial power source (101) while normal operation and offers the stored power to the inverter device (111) upon power failure. Hence, power of the rectangular wave is supplied to a drive system and a control system of the elevator from the inverter device (111) at the time of both normal operation and power failure. Accordingly, a backup operation can be switched to rapidly once the power failure occurs, in order to rescue passengers.
Description
Technical field
The present invention relates to a kind of elevator electric power supply system that possesses following function, this function is supplied with the electric power of elevator drive system and control system for carrying out with square wave.
Background technology
Usually in elevator, use three-phase alternating-current supply as industrial power, the control system of the drive system of hoist engine etc. and control panel etc. is supplied with required electric power.Moreover, when power failure has taken place industrial power, use stored electric power in the storage battery, cage operation is arrived nearest floor (for example, referring to patent documentation 1).
Here, in Figure 12, represent the electric power supply system structure of elevator in the past.In the accompanying drawing 101 is industrial power (three-phase alternating-current supplies).The figure shows out, from the drive system of 101 pairs of elevators of this industrial power and the structure of control system supply required electric power.
As the drive system of elevator, possess rectifier 102, smmothing capacitor 103, DC-to-AC converter (inverter) 104 and hoist engine 105.
The sine wave AC voltage of being supplied with from industrial power 101 offers DC-to-AC converter 104 via rectifier 102 and smmothing capacitor 103.By DC-to-AC converter 104, it is transformed to the needed frequency of driving and the voltage of hoist engine 105.On hoist engine 105, hanging car 11 and counterweight 12 by steel wire rope 13.If drive hoist engine 105 by DC-to-AC converter 104 rotations, then car 11 and counterweight 12 carry out lifting action by steel wire rope 13 with bucket type.
In addition, after the power circuit 106 of the sine wave AC voltage that will be supplied with from industrial power 101 by control system is transformed into required voltage, provide it to the control power circuit 107～108 that various control device are used.
Moreover, the reserve operation usefulness during as power failure, the drive system and the control system of elevator are provided with charger 201, storage battery 202 and power supply switched circuit 203 side by side relatively.When normal operation, in storage battery 202, store electric power by charger 201 in advance, when having a power failure with this storage battery 202 in stored electric power supply with to above-mentioned drive system and control system.In the accompanying drawing 204 and 205 is switches that electric power switches usefulness, opens when having a power failure.
Patent documentation 1 spy opens the 2005-126171 communique
As mentioned above, in electric power supply system in the past, when normal operation and when power failure all with sinusoidal wave supply capability.Though if supplied with electric power with sine wave, then can stably drive elevator, response is not good when having a power failure.Therefore, the problem that exist to take place that moment stops (instantaneous power-off) and take place to postpone etc. in the reserve operation of elevator.
Summary of the invention
The present invention makes in view of above-mentioned the sort of problem place, its purpose for provide a kind of can be to the drive system of elevator and control system supply capability and can when taking place to have a power failure, switch to reserve operation fast stably to rescue passenger's elevator electric power supply system.
The present invention is a kind of electric power supply system of elevator, is used for the drive system and the control system of elevator are supplied with required electric power, it is characterized by, and possesses: DC-to-AC converter, and the sinusoidal wave power converter that will supply with from industrial power is a square wave, exports; Storage battery store the electric power of above-mentioned industrial power when normal operation, and the electric power that it is stored offers above-mentioned DC-to-AC converter when having a power failure; When normal operation and when power failure all supply with the electric power of square wave from above-mentioned DC-to-AC converter.
Description of drawings
Fig. 1 is the block diagram of the structure of the related elevator electric power supply system of expression the present invention the 1st execution mode.
Fig. 2 is the block diagram of the structure of the related elevator electric power supply system of expression the present invention the 2nd execution mode.
Fig. 3 is the block diagram of the structure of the related elevator electric power supply system of expression the present invention the 3rd execution mode.
Fig. 4 is the block diagram of the structure of the related elevator electric power supply system of expression the present invention the 4th execution mode.
Fig. 5 is the block diagram of the structure of the related elevator electric power supply system of expression the present invention the 5th execution mode.
Fig. 6 is the block diagram of the structure of the related elevator electric power supply system of expression the present invention the 6th execution mode.
Fig. 7 is the block diagram of the structure of the related elevator electric power supply system of expression the present invention the 7th execution mode.
Fig. 8 is the block diagram of the structure of the related elevator electric power supply system of expression the present invention the 8th execution mode.
Fig. 9 is the block diagram of the structure of the related elevator electric power supply system of expression the present invention the 9th execution mode.
Figure 10 is the block diagram of the structure of the related elevator electric power supply system of expression the present invention the 10th execution mode.
Figure 11 is the block diagram of the structure of the related elevator electric power supply system of expression the present invention the 11st execution mode.
Figure 12 is a block diagram of representing the structure of elevator electric power supply system in the past.
Embodiment
Below, with reference to accompanying drawing embodiments of the present invention are described.
(the 1st execution mode)
Fig. 1 is the block diagram of the structure of the related elevator electric power supply system of expression the present invention the 1st execution mode, expresses the structure that the drive system and the control system of elevator are supplied with required electric power.In the accompanying drawing 101 is industrial powers, supplies with sinusoidal wave electric power.
As the drive system of elevator, possess rectifier 102, smmothing capacitor 103, DC-to-AC converter 104 and hoist engine 105.Rectifier 102 is a direct voltage with AC voltage conversion.Smmothing capacitor 103 makes the output voltage smoothing of rectifier 102.DC-to-AC converter 104 is the direct voltage that is provided via smmothing capacitor 103 from rectifier 102, by PWM (Pulse WidthModulation, the pulsewidth adjustment) control change is the alternating voltage of optional frequency, magnitude of voltage, and it is supplied with to hoist engine 105 as driving electric.
On the rotating shaft of hoist engine 105, not shown rope sheave is installed.By rolling up the steel wire rope of hanging 13 on this rope sheave, car 11 and counterweight 12 carry out lifting action with bucket type in hoist trunk.
In addition, as the control system of elevator, possesses the control power circuit 107～108 that power circuit 106 and various control device are used.Supplying with after electric power to control system is transformed into required electric power by power circuit 106, provide it to the control power circuit 107～108 that various control device are used.
Here, possess power supply device 109 in the present embodiment, this power supply device possesses the square wave output function.This power supply device 109 comprises rectifier 110, DC-to-AC converter 111, charger 112 and storage battery 113.
110 pairs of sinusoidal wave electric power of supplying with from industrial power 101 of rectifier carry out waveform shaping.DC-to-AC converter 111 will be predefined square wave by the sinusoidal wave power converter after rectifier 110 rectifications, export.Charger 112 carries out the charging control to storage battery 113.
In this structure, sinusoidal wave electric power set rectifier 110 by power supply device 109 of being supplied with from industrial power 101 carries out being transformed to square wave by DC-to-AC converter 111 after the waveform rectification.Be provided for the drive system and the control system of elevator from the square wave electric power of these DC-to-AC converter 111 outputs.In view of the above, rotate driving hoist engine 105 by rectifier 102, smmothing capacitor 103 and DC-to-AC converter 104, and supply with required electric powers by the control power circuit 107～108 of 106 pairs of various control device of power circuit, elevator normally moves.
In addition, during this period, the electric power with industrial power 101 in power supply device 109 is stored in the storage battery 113 by charger 112.
Here, for example if because of certain reason of earthquake etc., power failure has taken place in industrial power 101, then in power supply device 109, switches to storage battery 113 and carries out electric power and supply with.When having a power failure, utilize that stored electric power makes car 11 move to nearest floor in this storage battery 113.At this moment, supply with,, can switch to reserve operation fast so to compare response good with sine wave because carry out electric power with square wave.
Like this, according to the 1st execution mode of the present invention, because constituting with square wave, it carries out the electric power supply, so can be to the drive system and the control system stable supplying electric power of elevator, and can when power failure has taken place, switch to reserve operation fast, rescue the passenger.
In addition because it constitutes, when normal operation and when power failure all carry out electric power and supply with square wave, thereby compare with the electric power of only when having a power failure, just supplying with square wave, circuit structure is further oversimplified, can seek cost and descend.
(the 2nd execution mode)
Below, describe for the 2nd execution mode of the present invention.
In above-mentioned the 1st execution mode, it constitutes when normal operation and when power failure all carries out electric power with square wave and supplies with, but in the 2nd execution mode, carries out electric power with sine wave when normally moving and supply with, and switches to square wave and carry out electric power and supply with when having a power failure.
Fig. 2 is the block diagram of the structure of the related elevator electric power supply system of expression the present invention the 2nd execution mode.Also have, to above-mentioned the 1st execution mode in the identical additional identical symbol of part of structure of Fig. 1, omit explanation to it.
In the 2nd execution mode, except the structure of above-mentioned Fig. 1, also be provided with switch 114, power cut detection circuit 115 and switch drive circuit 116.
Switch 114 switches industrial power 101 and DC-to-AC converter 111 according to the switching signal from 116 outputs of switch drive circuit.Power cut detection circuit 115 detects the situation that power failure takes place industrial power 101.Switch drive circuit 116 to switch 114 output switching signals, carries out from the switching of industrial power 101 to DC-to-AC converter 111 when being detected power failure by power cut detection circuit 115.
In this structure, when normally moving switch 114 is switched to industrial power 101 sides, carry out sinusoidal wave electric power supply from the drive system and the control system of 101 pairs of elevators of industrial power.In view of the above, drive hoist engine 105 by rectifier 102, smmothing capacitor 103 and DC-to-AC converter 104, and supply with required electric power by the control power circuit 107～108 of 106 pairs of various control device of power circuit, elevator normally moves.
In addition, during this period, the electric power with industrial power 101 in power supply device 109 is stored in the storage battery 113 by charger 112.
Here, if detect the power failure of industrial power 101 by power cut detection circuit 115, then, switch 114 is switched to power supply device 109 sides, supply with from the electric power that the drive system and the control system of 111 pairs of elevators of DC-to-AC converter are carried out square wave by switch drive circuit 116.In view of the above, can make car 11 move to nearest floor.At this moment, supply with,, rescue the passenger so can switch to reserve operation fast because carry out electric power with square wave from DC-to-AC converter 111.
Like this, identical according to the 2nd execution mode of the present invention with above-mentioned the 1st execution mode, supply with by carry out electric power with square wave, just can switch to reserve operation fast, rescue the passenger.In addition, when normal operation, carry out the electric power supply, just can stably drive elevator, can guarantee ride comfort by switching to sine wave.
(the 3rd execution mode)
Below, describe for the 3rd execution mode of the present invention.
In the 3rd execution mode, industrial power has taken place to switch to when unusual in the output of the square wave of DC-to-AC converter carried out electric power and supply with.
Fig. 3 is the block diagram of the structure of the related elevator electric power supply system of expression the present invention the 3rd execution mode.Also have, to above-mentioned the 1st execution mode in the identical additional identical symbol of part of structure of Fig. 1, omit explanation to it.
In the 3rd execution mode, except the structure of above-mentioned Fig. 1, also be provided with SW (switch) 117, output detector (transducer) 118a, output detection circuit 118 and protective circuit 119.
SW117 carries out the switching of industrial power 101 and DC-to-AC converter 111 according to the switching signal from protective circuit 119 outputs.Output detector 118a is arranged on DC-to-AC converter 111 sides, detects the output of square wave.The detection signal of output detection circuit 118 input and output detector 118a, the output abnormality of detection DC-to-AC converter 111, the output of square wave just has no abnormal.Protective circuit 119 exists, and exports switching signal to SW117 when detecting the output abnormality of DC-to-AC converter 111 by output detection circuit 118, carries out from the switching of DC-to-AC converter 111 to industrial power 101.
In this structure, when normal operation and when power failure, SW117 switches to power supply device 109 sides, supplies with from the electric power that the drive system and the control system of 111 pairs of elevators of DC-to-AC converter are carried out square wave.When normal operation, drive hoist engine 105 by rectifier 102, smmothing capacitor 103 and DC-to-AC converter 104, and supply with required electric power by the control power circuit 107～108 of 106 pairs of various control device of power circuit, elevator normally moves.
In addition, during this period, the electric power with industrial power 101 in power supply device 109 is stored in the storage battery 113 by charger 112.And, if power failure has taken place, then utilize electric power stored in the storage battery 113, make car 11 move to nearest floor.At this moment, supply with,, rescue the passenger so can when having a power failure, switch to reserve operation fast as mentioned above because carry out electric power with square wave from DC-to-AC converter 111.
Here; if the fault because of DC-to-AC converter 111 when normal operation has taken place unusual in square wave output; then start protective circuit 119 by output detector 118a and output detection circuit 118; switching signal according to from these protective circuit 119 outputs switches to industrial power 101 sides with SW117.Whereby, to the drive system and the control system of elevator, with sinusoidal wave supply capability.
Like this, identical according to the 3rd execution mode of the present invention with above-mentioned the 1st execution mode, supply with by carry out electric power with square wave, just can when having a power failure, switch to reserve operation fast, rescue the passenger.In addition, certain having taken place when unusual, utilized sinusoidal wave electric power to supply with by switching to, just can continue to move under the situation that elevator is stopped in square wave output.
(the 4th execution mode)
Below, describe for the 4th execution mode of the present invention.
In the 4th execution mode, in the structure that the electric power that when having a power failure the drive system and the control system of elevator is utilized square wave is supplied with, infer the life-span of the DC-to-AC converter of output square wave, and give a warning.
Fig. 4 is the block diagram of the structure of the related elevator electric power supply system of expression the present invention the 4th execution mode.Also have, to above-mentioned the 1st execution mode in the identical additional identical symbol of part of structure of Fig. 1, omit explanation to it.
In the 4th execution mode, except the structure of above-mentioned Fig. 1, also be provided with life-span deduction circuit 120 and acknowledge circuit 120a.Life-span is inferred the life-span that circuit 120 is inferred DC-to-AC converter 111.Acknowledge circuit 120a infers the inferred results of circuit 120 according to the life-span, gives a warning.
In this structure, when normal operation and when power failure, all supply with from the electric power that the drive system and the control system of 111 pairs of elevators of DC-to-AC converter are carried out square wave.When normal operation, drive hoist engine 105 by rectifier 102, smmothing capacitor 103 and DC-to-AC converter 104, and supply with required electric power by the control power circuit 107～108 of 106 pairs of various control device of power circuit, elevator normally moves.
In addition, during this period, the electric power with industrial power 101 in power supply device 109 is stored in the storage battery 113 by charger 112.And, if power failure has taken place, then utilize electric power stored in the storage battery 113, make car 11 move to nearest floor.At this moment, supply with,, rescue the passenger so can when having a power failure, switch to reserve operation fast as mentioned above because carry out electric power with square wave from DC-to-AC converter 111.
Here, square wave output was inferred by life-span deduction circuit 120 with the life-span of DC-to-AC converter 111.As life-span deduction method, the method for judging the service time of for example with good grounds DC-to-AC converter 111, the method judged according to the temperature of DC-to-AC converter 111 etc.That is to say, reach predefined replacing during fiducial time, judge the degree that the life-span has dropped to the needs replacing in the service time of DC-to-AC converter 111.In addition, under the sort of situation of temperature more than or equal to predetermined temperature of DC-to-AC converter 111, there are the aging possibilities of circuit element such as switch element, judge the degree that the life-span has dropped to the needs replacing.
When the life-span has dropped to the degree that needs replacing, the warning of sending this meaning by acknowledge circuit 120a.This acknowledge circuit 120a for example is made of emergency warning lamp, lights action according to the signal of inferring circuit 120 outputs from the life-span.In view of the above, the attendant can grasp the life-span of DC-to-AC converter 111, the counter-measure of taking to change etc.
Also have, also can make acknowledge circuit 120a have communication function, for example monitoring room in the building or outside remote monitroing center are reported to the police.
Like this, identical according to the 4th execution mode of the present invention with above-mentioned the 1st execution mode, supply with by carry out electric power with square wave, just can when having a power failure, switch to reserve operation fast, rescue the passenger.In addition, the life-span by inferring DC-to-AC converter 111 also gives a warning, thereby can implement the counter-measure of replacing etc. before DC-to-AC converter 111 breaks down, to guarantee fail safe.
Also have, though the structure with above-mentioned the 1st execution mode is that prerequisite is illustrated here, even if but the structure of above-mentioned the 2nd execution mode, carry out electric power with sine wave when just normally moving as shown in Figure 2 and supply with, when having a power failure, switch to the structure that square wave carries out the electric power supply, also can use.
(the 5th execution mode)
Below, describe for the 5th execution mode of the present invention.
In the 5th execution mode, in the structure that the electric power that when having a power failure the drive system and the control system of elevator is utilized square wave is supplied with, infer the life-span of the DC-to-AC converter of output square wave, carry out the output control of elevator drive system.
Fig. 5 is the block diagram of the structure of the related elevator electric power supply system of expression the present invention the 5th execution mode.Also have, to above-mentioned the 1st execution mode of u in the identical additional identical symbol of part of structure of Fig. 1, omit explanation to it.
In the 5th execution mode, except the structure of above-mentioned Fig. 1, also be provided with life-span deduction circuit 120 and output control circuit 121.Life-span is inferred the life-span that circuit 120 is inferred DC-to-AC converter 111.Output control circuit 121 is inferred the inferred results of circuit 120 according to the life-span, carries out the output control as the DC-to-AC converter 104 of elevator drive system.
In this structure, when normal operation and when power failure, all supply with from the electric power that the drive system and the control system of 111 pairs of elevators of DC-to-AC converter are carried out square wave.When normal operation, drive hoist engine 105 by rectifier 102, smmothing capacitor 103 and DC-to-AC converter 104, and supply with required electric power by the control power circuit 107～108 of 106 pairs of various control device of power circuit, elevator normally moves.
In addition, during this period, the electric power with industrial power 101 in power supply device 109 is stored in the storage battery 113 by charger 112.And, if power failure has taken place, then utilize electric power stored in the storage battery 113, make car 11 move to nearest floor.At this moment, supply with,, rescue the passenger so can when having a power failure, switch to reserve operation fast as mentioned above because carry out electric power with square wave from DC-to-AC converter 111.
Here, square wave output was inferred by life-span deduction circuit 120 with the life-span of DC-to-AC converter 111.As life-span deduction method, as illustrated in above-mentioned the 4th execution mode, the method that the service time of for example with good grounds DC-to-AC converter 111, temperature rise and judge.
When DC-to-AC converter 111 is closed on the degree of needs replacing, from the DC-to-AC converter 104 output output control signals of 121 pairs of elevator drive systems of output control circuit.In view of the above, the output of DC-to-AC converter 104 only is suppressed lowlyer by predetermined level, and hoist engine 105 and normal phase are than driving slowlyer.
Like this, identical according to the 5th execution mode of the present invention with above-mentioned the 1st execution mode, supply with by carry out electric power with square wave, just can when having a power failure, switch to reserve operation fast, rescue the passenger.In addition, carry out the output control of elevator drive system when having descended, just can continue the operation of elevator during before attendant's arrival long or shortly by life-span in DC-to-AC converter 111.
Also have, preferential is when the life-span of DC-to-AC converter 111 has descended, to give a warning as above-mentioned the 4th execution mode.
In addition, though the structure with above-mentioned the 1st execution mode is that prerequisite is illustrated here, even if but the structure of above-mentioned the 2nd execution mode, carry out electric power with sine wave when just normally moving as shown in Figure 2 and supply with, when having a power failure, switch to the structure that square wave carries out the electric power supply, also can use.
(the 6th execution mode)
Below, describe for the 6th execution mode of the present invention.
In the 6th execution mode, when having a power failure, can not carry out electric power when supplying with because of the fault of DC-to-AC converter, the operation by switch makes the electric power of storage battery supply with to braking circuit and drives elevator.
Fig. 6 is the block diagram of the structure of the related elevator electric power supply system of expression the present invention the 6th execution mode.Also have, to above-mentioned the 2nd execution mode in the identical additional identical symbol of part of structure of Fig. 2, omit explanation to it.
In the 6th execution mode, except the structure of above-mentioned Fig. 2, also be provided with outside SW (switch) 122, voltage raising and reducing circuit 123 and braking circuit 124.Outside SW122 is used for making the hand switch of the electric power of storage battery 113 to braking circuit 124 supplies.Voltage raising and reducing circuit 123 is controlled to be the electric power voltage raising and reducing of storage battery 113 the needed level of driving of braking circuit 124.Braking circuit 124 drives set electromagnetic brake 105a on the hoist engine 105.
In this structure, when normally moving switch 114 is switched to industrial power 101 sides, carry out sinusoidal wave electric power supply from the drive system and the control system of 101 pairs of elevators of industrial power.In view of the above, drive hoist engine 105 by rectifier 102, smmothing capacitor 103 and DC-to-AC converter 104, and supply with required electric power by the control power circuit 107～108 of 106 pairs of various control device of power circuit, elevator normally moves.
In addition, during this period, the electric power with industrial power 101 in power supply device 109 is stored in the storage battery 113 by charger 112.And, if detect the power failure of industrial power 101 by power cut detection circuit 115, then by switch drive circuit 116, switch 114 is switched to power supply device 109 sides, utilize the drive system of 113 pairs of elevators of storage battery and electric power that control system is carried out square wave to supply with.Therefore, can make car 11 move to nearest floor.At this moment, supply with,, rescue the passenger so can when having a power failure, switch to reserve operation fast as mentioned above because carry out electric power with square wave from DC-to-AC converter 111.
Here, when its state can not carry out the electric power supply for DC-to-AC converter 111 when having a power failure breaks down, operate outside SW122.If operated outside SW122, then after the electric power with storage battery 113 is transformed to predetermined level by voltage raising and reducing circuit 123, provide it to braking circuit 124.In view of the above, the electromagnetic brake 105a of hoist engine 105 opens, and can utilize the out-of-balance force between car 11 and the counterweight 12, makes car 11 move to nearest floor.
Like this, identical according to the 6th execution mode of the present invention with above-mentioned the 1st execution mode, supply with by carry out electric power with square wave, just can when having a power failure, switch to reserve operation fast, rescue the passenger.In addition, because possess the function that the operation by outside SW122 makes the electric power of storage battery supply with to braking circuit in advance, so, also can rescue operation even if can not carry out electric power when having a power failure when supplying with at its state.
In addition, though be that prerequisite is illustrated with the structure of above-mentioned the 2nd execution mode here,, also can use even if the structure of above-mentioned the 1st execution mode is all carried out the structure that electric power is supplied with sine wave when just normally moving as shown in Figure 1 and when having a power failure.
(the 7th execution mode)
Below, describe for the 7th execution mode of the present invention.
In the 7th execution mode, in the structure that the electric power that when having a power failure the drive system and the control system of elevator is utilized square wave is supplied with, utilize the regenerated electric power of elevator that storage battery is charged.
Fig. 7 is the block diagram of the structure of the related elevator electric power supply system of expression the present invention the 7th execution mode.Also have,, omit explanation it to the additional identical symbol of the part identical with the structure of Fig. 2 in above-mentioned the 2nd execution mode.
In the 7th execution mode, in the structure of above-mentioned Fig. 2, replace and the charger 112 that directly is linked on the industrial power 101, charger 125 is set, and is provided with and is used for this charger 125 is sent into the regeneration resistance 126 and the switch element 127 of regenerated electric power.Regeneration resistance 126 is to be used for regenerated electric power is converted to the resistance of heat energy.Switch element 127 is opened when the regeneration operation, and the regenerated electric power that comes from DC-to-AC converter 104 reverse flow is flowed to regeneration resistance 126.
In this structure, when normally moving switch 114 is switched to industrial power 101 sides, carry out sinusoidal wave electric power supply from the drive system and the control system of 101 pairs of elevators of industrial power.In view of the above, drive hoist engine 105 by rectifier 102, smmothing capacitor 103 and DC-to-AC converter 104, and supply with required electric power by the control power circuit 107～108 of 106 pairs of various control device of power circuit, elevator normally moves.
Here, will feed back to power supply device 109 at the regenerated electric power that produces in service of elevator, and provide it to storage battery 113.
That is to say, for example at the car 11 of elevator during to the following direction motion of hoist trunk because as long as this moment car 11 load ratio counterweight 12 weights, just do not need power, so the motor of hoist engine 105 plays a role as generator, produce regenerated electric power.In addition, at car 11 upward to when motion because as long as this moment car 11 load ratio counterweight 12 light, just do not need power, so produce regenerated electric power.Like this, will not need power and the situation of car 11 operation is called " regeneration operation ", will need the operation of power to be called on the contrary " running under power ".
The electric power that produces in when operation regeneration is owing to flow to regeneration resistor 126 by switch element 127, thereby provides it to 125 pairs of storage batterys 113 of charger and charge.And, if detect the power failure of industrial power 101 by power cut detection circuit 115, then by switch drive circuit 116, switch 114 is switched to power supply device 109 sides, utilize the drive system of 113 pairs of elevators of storage battery and electric power that control system is carried out square wave to supply with.In view of the above, can make car 11 move to nearest floor.At this moment, supply with,, rescue the passenger so can when having a power failure, switch to reserve operation fast as mentioned above because carry out electric power with square wave from DC-to-AC converter 111.
Like this, identical according to the 7th execution mode of the present invention with above-mentioned the 1st execution mode, supply with by carry out electric power with square wave, just can when having a power failure, switch to reserve operation fast, rescue the passenger.In addition, can utilize the regenerated electric power of elevator, storage battery is effectively charged.
Also have, though be that prerequisite is illustrated with the structure of above-mentioned the 2nd execution mode here, even if the structure of above-mentioned the 1st execution mode, the structure of all carrying out the electric power supply with square wave when just normally moving as shown in Figure 1 and when having a power failure also can be used.
(the 8th execution mode)
Below, describe for the 8th execution mode of the present invention.
In the 8th execution mode, in the structure that the electric power that when having a power failure the drive system and the control system of elevator is utilized square wave is supplied with, possesses the adjustment function of level.
Fig. 8 is the block diagram of the structure of the related elevator electric power supply system of expression the present invention the 8th execution mode.Also have, to above-mentioned the 2nd execution mode in the identical additional identical symbol of part of structure of Fig. 2, omit explanation to it.
In the 8th execution mode, except the structure of above-mentioned Fig. 2, also be provided with voltage adjuster 128.Voltage adjuster 128 is arranged on the output of switch 114, adjusts the level of the electric power of supplying with from the drive system and the control system of industrial power 101 or 111 pairs of elevators of DC-to-AC converter.
In this structure, switch 114 switches to industrial power 101 sides when normally moving, and carries out sinusoidal wave electric power supply from the drive system and the control system of 101 pairs of elevators of industrial power.In view of the above, drive hoist engine 105 by rectifier 102, smmothing capacitor 103 and DC-to-AC converter 104, and supply with required electric power by the control power circuit 107～108 of 106 pairs of various control device of power circuit, elevator normally moves.
In addition, during this period, the electric power with industrial power 101 in power supply device 109 is stored in the storage battery 113 by charger 112.And, if detect the power failure of industrial power 101 by power cut detection circuit 115, then by switch drive circuit 116, switch 114 is switched to power supply device 109 sides, utilize the drive system of 113 pairs of elevators of storage battery and electric power that control system is carried out square wave to supply with.Therefore, can make car 11 move to nearest floor.At this moment, supply with,, rescue the passenger so can when having a power failure, switch to reserve operation fast as mentioned above because carry out electric power with square wave from DC-to-AC converter 111.
Here, even if when the sine voltage change of supplying with from industrial power 101 is big, when when having a power failure, having taken place from square-wave voltage change that power supply device 109 is supplied with, also can level be adjusted into appropriate value, supply with the drive system and the control system of giving elevator afterwards by voltage adjuster 128.
Like this, identical according to the 8th execution mode of the present invention with above-mentioned the 1st execution mode, supply with by carry out electric power with square wave, just can when having a power failure, switch to reserve operation fast, rescue the passenger.In addition, for variation in voltage, also can always keep certain voltage and come the stabilized driving elevator.
Also have, though the structure with above-mentioned the 2nd execution mode is that prerequisite is illustrated here, even if but the structure of above-mentioned the 1st execution mode, just as shown in Figure 1 when normal operation and when power failure all carry out the structure that electric power is supplied with square wave, also can use.
(the 9th execution mode)
Below, describe for the 9th execution mode of the present invention.
In the 9th execution mode,, when having a power failure, utilize the electric power of square wave to supply with to each elevator drive system and the control system of A system and B system.
Fig. 9 is the block diagram of the structure of the related elevator electric power supply system of expression the present invention the 9th execution mode.Also have, to above-mentioned the 2nd execution mode in the identical additional identical symbol of part of structure of Fig. 2, omit explanation to it.
In the 9th execution mode, it constitutes each elevator that is driven A system and B system by 1 power supply device 109 simultaneously.The elevator of A system possesses rectifier 102A, smmothing capacitor 103A, DC-to-AC converter 104A and hoist engine 105A as drive system, and possesses power circuit 106A and control power circuit 107A～108A as control system.On hoist engine 105A, hanging car 11A and counterweight 12A by steel wire rope 13A, the rotation driving by hoist engine 105A makes car 11A and counterweight 12A carry out lifting action with bucket type in hoist trunk.
Elevator for the B system also is identical structure, possesses rectifier 102B, smmothing capacitor 103B, DC-to-AC converter 104B and hoist engine 105B as drive system, and possesses power circuit 106B and control power circuit 107B～108B as control system.On hoist engine 105B, hanging car 11B and counterweight 12B by steel wire rope 13B, by the rotation driving of volume machine 105B, car 11B and counterweight 12B carry out lifting action with bucket type in hoist trunk.
In this structure, when normally moving switch 114 is switched to industrial power 101 sides, each elevator drive system and the control system of A system and B system are carried out sinusoidal wave electric power supply.In view of the above, in the elevator of A system, drive hoist engine 105A by rectifier 102A, smmothing capacitor 103A and DC-to-AC converter 104A, and by power circuit 106A the control power circuit 107A～108A of various control device is supplied with required electric power, elevator normally moves.Elevator for the B system is also identical, drive hoist engine 105B by rectifier 102B, smmothing capacitor 103B and DC-to-AC converter 104B, and by power circuit 106B the control power circuit 107B～108B of various control device is supplied with required electric power, elevator normally moves.
In addition, during this period, the electric power with industrial power 101 in power supply device 109 is stored in the storage battery 113 by charger 112.And, if detect the power failure of industrial power 101 by power cut detection circuit 115, then by switch drive circuit 116, switch 114 is switched to power supply device 109 sides, utilize each elevator drive system of 113 pairs of A systems of storage battery and B system and electric power that control system is carried out square wave to supply with.In view of the above, can make car 11A, 11B move to nearest floor respectively.At this moment, supply with,, rescue the passenger so can when having a power failure, switch to reserve operation fast because carry out electric power with square wave from DC-to-AC converter 111.
Like this, also identical according to the 9th execution mode of the present invention with above-mentioned the 1st execution mode for the multi-section elevator, supply with by carry out electric power with square wave, just can when having a power failure, switch to reserve operation fast, rescue the passenger.
Also have, though the structure with above-mentioned the 2nd execution mode is that prerequisite is illustrated here, even if but the structure of above-mentioned the 1st execution mode, just as shown in Figure 1 when normal operation and when power failure all carry out the structure that electric power is supplied with square wave, also can use.
In addition, in the example of Fig. 9, though only illustrate 2 elevators, even if also identical when having more elevator.
(the 10th execution mode)
Below, describe for the 10th execution mode of the present invention.
In the 10th execution mode, power supply device with DC-to-AC converter is set in every elevator, when having a power failure, utilize the electric power of square wave to supply with respectively, and when fault has taken place in the power supply device corresponding with certain elevator, use the power supply device corresponding, carry out the electric power of two elevators is supplied with another elevator.
Figure 10 is the block diagram of the related elevator electric power supply system structure of expression the present invention the 10th execution mode.Also have, to above-mentioned the 9th execution mode in the identical additional identical symbol of part of structure of Fig. 9, omit explanation to it.
In the 10th execution mode, it constitutes by driving each elevator of A system and B system respectively with each self-corresponding power supply device 109A, 109B.In the elevator of A system, power supply device 109A possesses: rectifier 110A and DC-to-AC converter 111A, with generating and export square wave; Charger 112A and storage battery 113A, the electric power when being used for having a power failure is supplied with.Rectifier 110A carries out waveform shaping to the alternating voltage of industrial power 101.DC-to-AC converter 111A controls frequency, the level by the sine wave AC voltage after the rectifier 110A rectification changeably, generates and export the alternating voltage of square wave.
In addition, identical with above-mentioned the 2nd execution mode (Fig. 2), the structure that the electric power when being used for having a power failure switches is provided with switch 114A, power cut detection circuit 115A and switch drive circuit 116A.Switch 114A switches the sinewave output of industrial power 101 and the square wave output of power supply device 109A according to the switching signal from switch drive circuit 116A output.Power cut detection circuit 115A detects the situation that power failure takes place industrial power 101.Switch drive circuit 116A to switch 114A output switching signal, switches to the square wave output of power supply device 109A from the sinewave output of industrial power 101 when being detected power failure by power cut detection circuit 115A.
Elevator for the B system is also identical, and power supply device 109B possesses: rectifier 110B and DC-to-AC converter 111B, with generating and export square wave; Charger 112B and storage battery 113B, the electric power when being used for having a power failure is supplied with.DC-to-AC converter 111B controls frequency, the level by the sine wave AC voltage after the rectifier 110B rectification changeably, generates and export the alternating voltage of square wave.
In addition, the structure that the electric power when being used for having a power failure switches is provided with switch 114B, power cut detection circuit 115B and switch drive circuit 116B.Switch 114B switches the sinewave output of industrial power 101 and the square wave output of power supply device 109B according to the switching signal from switch driving circuit 116B output.Power cut detection circuit 115B detects the situation that power failure takes place industrial power 101.Switch drive circuit 116B to switch 114B output switching signal, switches to the square wave output of power supply device 109B from the sinewave output of industrial power 101 when being detected power failure by power cut detection circuit 115B.
Moreover, as the structure that is used for switching A systematic electricity feed unit and B systematic electricity feed unit, be provided with output detection circuit 129, output circuit breaker 130A, 130B and power supply and supply with contactor 131.
Power supply is supplied with contactor 131 between the electric power feed unit of the electric power feed unit of A system and B system, output signal according to output detection circuit 129 is carried out switch motion, will supply with to another elevator from the electric power that an electric power feed unit is supplied with under the state of closure.
In this structure, at the electric power feed unit of A system and B system just often, output circuit breaker 130A, 130B are in closed state, and power supply is supplied with and is in the state of opening with contactor 131, carries out the electric power supply separately respectively.
That is to say, when normally moving switch 114A, 114B are switched to industrial power 101 sides, each elevator drive system and the control system of A system and B system are carried out sinusoidal wave electric power supply.In view of the above, in the elevator of A system, drive hoist engine 105A by rectifier 102A, smmothing capacitor 103A and DC-to-AC converter 104A, and by power circuit 106A the control power circuit 107A～108A of various control device is supplied with required electric power, elevator normally moves.
Elevator for the B system is also identical, drive hoist engine 105B by rectifier 102B, smmothing capacitor 103B and DC-to-AC converter 104B, and by power circuit 106B the control power circuit 107B～108B of various control device is supplied with required electric power, elevator normally moves.
In addition, during this period, the electric power with industrial power 101 in power supply device 109 is stored among the storage battery 113A by charger 112A.And, if detect the power failure of industrial power 101 by power cut detection circuit 115A, then by switch drive circuit 116A, switch 114A is switched to power supply device 109A side, and the electric power that utilizes storage battery 113A that the drive system and the control system of the elevator of A system are carried out square wave is supplied with.In view of the above, can make car 11A move to nearest floor.At this moment, supply with,, rescue the passenger so can when having a power failure, switch to reserve operation fast because carry out electric power with square wave from DC-to-AC converter 111.
Also identical in power supply device 109B, the electric power of industrial power 101 is stored among the storage battery 113B by charger 112B.And, if detect the power failure of industrial power 101 by power cut detection circuit 115B, then by switch drive circuit 116B, switch 114B is switched to power supply device 109B side, the electric power that utilizes storage battery 113B that the elevator drive system and the control system of B system are carried out square wave is supplied with.In view of the above, can make car 11B move to nearest floor.At this moment, supply with,, rescue the passenger so can when having a power failure, switch to reserve operation fast because carry out electric power with square wave from DC-to-AC converter 111.
Here, when fault has taken place the some electric power feed units when having a power failure in A system and the B system, will utilize another electric power feed unit.
That is to say, fault has taken place in the electric power feed unit of for example supposing the A system, and then output detection circuit 129 is opened output circuit breaker 130A, disconnects the electric power feed unit of A system, and closed power supply is supplied with contactor 131, and the electric power feed unit of B system and the elevator of A system are linked.In view of the above, can utilize from the square wave electric power of power supply device 109B output and supply with, make the elevator operation of A system.
Like this, identical according to the 10th execution mode of the present invention with above-mentioned the 1st execution mode, supply with by carry out electric power with square wave, just can when having a power failure, switch to reserve operation fast, rescue the passenger.In addition, in the structure that is provided with the corresponding power supply device of each elevator,, also can drive elevator, rescue the passenger by the power supply device that utilizes other even when fault has taken place certain power supply device when having a power failure.
Also have, though the structure with above-mentioned the 2nd execution mode is that prerequisite is illustrated here, even if but the structure of above-mentioned the 1st execution mode, just as shown in Figure 1 when normal operation and when power failure all carry out the structure that electric power is supplied with square wave, also can use.
In addition, in the example of Figure 10, though only illustrate 2 elevators, also identical when having more elevator.
(the 11st execution mode)
Below, describe for the 11st execution mode of the present invention.
In the 11st execution mode, power supply device with DC-to-AC converter is set in every elevator, when having a power failure, utilize the electric power of square wave to supply with respectively, and with the battery capacity of the corresponding power supply device of certain elevator when not enough, switch to and the corresponding power supply device of another elevator by predetermined timing, carry out the electric power of this elevator is supplied with.
Figure 11 is the block diagram of the related elevator electric power supply system structure of expression the present invention the 11st execution mode.Also have, to above-mentioned the 10th execution mode in the identical additional identical symbol of part of structure of Figure 10, omit explanation to it.
Though basic structure is identical with above-mentioned the 10th execution mode (Figure 10), replaces output detection circuit 129 here, and is provided with battery capacity testing circuit 132.This battery capacity testing circuit 132 monitors storage battery 113A set in power supply device 109A and the capacity of set storage battery 113B in power supply device 109B, when a battery capacity is not enough when having a power failure, output circuit breaker 130A, 130B and power supply supply are carried out switch control with contactor 131, switch electric power and supply with.
In this structure, at the electric power feed unit of A system and B system just often, output circuit breaker 130A, 130B are in closed state, and power supply is supplied with and is in the state of opening with contactor 131, carries out the electric power supply separately respectively.
That is to say, when normally moving switch 114A, 114B are switched to industrial power 101 sides, each elevator drive system and the control system of A system and B system are carried out sinusoidal wave electric power supply.In view of the above, in the elevator of A system, drive hoist engine 105A by rectifier 102A, smmothing capacitor 103A and DC-to-AC converter 104A, and by power circuit 106A the control power circuit 107A～108A of various control device is supplied with required electric power, elevator normally moves.
Elevator for the B system is also identical, drive hoist engine 105B by rectifier 102B, smmothing capacitor 103B and DC-to-AC converter 104B, and supply with required electric power for the control power circuit 107B～108B of various control device by power circuit 106B, elevator normally moves.
In addition, during this period, the electric power with industrial power 101 in power supply device 109A is stored among the storage battery 113A by charger 112A.And, if detect the power failure of industrial power 101 by power cut detection circuit 115A, then by switch drive circuit 116A, switch 114A is switched to power supply device 109A side, the electric power that utilizes storage battery 113A that the elevator drive system and the control system of A system are carried out square wave is supplied with.In view of the above, can make car 11A move to nearest floor.At this moment, supply with,, rescue the passenger so can when having a power failure, switch to reserve operation fast because carry out electric power with square wave from DC-to-AC converter 111.
Also identical in power supply device 109B, the electric power of industrial power 101 is stored among the storage battery 113B by charger 112B.And, if detect the power failure of industrial power 101 by power cut detection circuit 115B, then by switch drive circuit 116B, switch 114B is switched to power supply device 109B side, the electric power that utilizes storage battery 113B that the elevator drive system and the control system of B system are carried out square wave is supplied with.In view of the above, can make car 11B move to nearest floor.At this moment, supply with,, rescue the passenger so can when having a power failure, switch to reserve operation fast because carry out electric power with square wave from DC-to-AC converter 111.
Here, when the some battery capacitys when having a power failure in A system and the B system are not enough, will switch electric power and supply with.
That is to say, for example suppose the situation of the off-capacity of the storage battery 113A of A system, specifically being capacity compares still less state with the needed predetermined volumes of operation of rescuing of elevator.In this case, output detection circuit 129 is after the elevator of B system is rescued operation, open the electric power feed unit disconnection of output circuit breaker 130B, and the supply of closed power supply links the electric power feed unit of B system and the elevator of A system with contactor 131 with the B system.In view of the above, can utilize, make the elevator operation of A system from the electric power supply of the square wave of power supply device 109B output.
Like this, identical according to the 11st execution mode of the present invention with above-mentioned the 1st execution mode, supply with by carry out electric power with square wave, just can when having a power failure, switch to reserve operation fast, rescue the passenger.In addition, in the structure that is provided with the corresponding power supply device of each elevator, even if when having a power failure during with the battery capacity deficiency of the corresponding power supply device of certain elevator, also can by from the corresponding power supply device supply capability of another elevator, rescue the passenger in this elevator.
Also have, though the structure with above-mentioned the 2nd execution mode is that prerequisite is illustrated here, even if but the structure of above-mentioned the 1st execution mode, just as shown in Figure 1 when normal operation and when power failure all carry out the structure that electric power is supplied with square wave, also can use.
In addition, in the example of Figure 11, though only illustrate 2 elevators, also identical when having more elevator.
Also have, the present invention is not defined as the previous status of the respective embodiments described above, the implementation phase can in the scope that does not break away from its main idea, be specialized by flexible structure important document.In addition, can utilize the appropriate combination of a plurality of structure important documents of institute's publicity in the respective embodiments described above, form variety of way.For example, also can from the entire infrastructure important document shown in the execution mode, omit several structure important documents.Moreover structure important document that also can different execution modes is related is appropriate combination in addition.
According to the present invention, can adopt with square wave and carry out the structure that electric power is supplied with, to the drive system of elevator and control system supply capability stably, and can when taking place to have a power failure, switch to reserve operation fast, rescue the passenger.
Claims (10)
1. the electric power supply system of an elevator is supplied with required electric power to the drive system and the control system of elevator, it is characterized by,
Possess:
DC-to-AC converter, the sinusoidal wave power converter that will supply with from industrial power is a square wave, exports;
Storage battery store the electric power of described industrial power when normal operation, and the electric power that it is stored offers described DC-to-AC converter when having a power failure; And
Switch switches described industrial power and described DC-to-AC converter;
When normal operation, supply with sinusoidal wave electric power, and described storage battery is charged, when having a power failure, switch to described DC-to-AC converter, supply with the electric power of square wave by described switch from described industrial power.
2. the electric power supply system of elevator according to claim 1 is characterized by,
Possess:
Output detection circuit detects the output abnormality of described DC-to-AC converter;
Switch when detecting the output abnormality of described DC-to-AC converter by described output detection circuit, switches to described industrial power.
3. the electric power supply system of elevator according to claim 1 is characterized by,
Possess:
Life-span is inferred circuit, the life-span of inferring described DC-to-AC converter;
Acknowledge circuit infers that according to this life-span the inferred results of circuit gives a warning to the outside.
4. the electric power supply system of elevator according to claim 1 is characterized by,
Possess:
Life-span is inferred circuit, the life-span of inferring described DC-to-AC converter;
Output control circuit according to the inferred results of this life-span deduction circuit, carries out the output control of the drive system of described elevator.
5. the electric power supply system of elevator according to claim 1 is characterized by,
Possess switch, this switch is used for making when having a power failure electric power set braking circuit in the drive system at described elevator of described storage battery to supply with.
6. the electric power supply system of elevator according to claim 1 is characterized by,
Possess charger, the electric power that this charger utilizing is produced when the regeneration operation of described elevator charges to described storage battery.
7. the electric power supply system of elevator according to claim 1 is characterized by,
Possess voltage adjuster, this voltage adjuster is adjusted the level of the electric power of the drive system and the control system of described elevator being supplied with from described industrial power or described DC-to-AC converter.
8. the electric power supply system of elevator according to claim 1 is characterized by,
To the drive system and the control system of multi-section elevator, the common power supply device that is provided with described DC-to-AC converter.
9. the electric power supply system of elevator according to claim 1 is characterized by,
Drive system and control system to the multi-section elevator, power supply device with described DC-to-AC converter is set respectively, when breaking down, utilize and the corresponding power supply device of another elevator, carry out the electric power of these two elevators is supplied with a certain the corresponding power supply device of elevator.
10. the electric power supply system of elevator according to claim 1 is characterized by,
Drive system and control system to the multi-section elevator, power supply device with described DC-to-AC converter is set respectively, switching to and the corresponding power supply device of another elevator by predetermined timing when not enough, carry out the electric power of this a certain elevator is supplied with the battery capacity of a certain the corresponding power supply device of elevator.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007176499A JP5240684B2 (en) | 2007-07-04 | 2007-07-04 | Elevator power supply system |
| JP176499/2007 | 2007-07-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101340106A CN101340106A (en) | 2009-01-07 |
| CN101340106B true CN101340106B (en) | 2011-07-20 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101319790A Expired - Fee Related CN101340106B (en) | 2007-07-04 | 2008-07-04 | Power supply system of elevator |
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| Country | Link |
|---|---|
| JP (1) | JP5240684B2 (en) |
| CN (1) | CN101340106B (en) |
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| JP4866923B2 (en) * | 2009-02-10 | 2012-02-01 | 株式会社日立製作所 | Elevator control system |
| US8960371B2 (en) | 2009-06-30 | 2015-02-24 | Otis Gmbh & Co. Ohg | Gravity driven start phase in power limited elevator rescue operation |
| JP5456527B2 (en) * | 2010-03-19 | 2014-04-02 | 東芝エレベータ株式会社 | Elevator control device |
| WO2012172590A1 (en) * | 2011-06-13 | 2012-12-20 | 三菱電機株式会社 | Elevator control device |
| TWI460958B (en) * | 2012-03-22 | 2014-11-11 | Atomic Energy Council | Integrated generation control system |
| CN103684141B (en) * | 2012-08-31 | 2016-09-07 | 安川电机（中国）有限公司 | Controller for motor and motor control method |
| JP2014114107A (en) * | 2012-12-07 | 2014-06-26 | Toshiba Elevator Co Ltd | Elevator control device |
| CN104181471B (en) * | 2013-05-28 | 2016-12-28 | 阳光电源股份有限公司 | A kind of inverter power consumption monitoring method and apparatus |
| JP2015124074A (en) * | 2013-12-27 | 2015-07-06 | 東芝エレベータ株式会社 | Elevator |
| CN104150298B (en) * | 2014-08-18 | 2018-07-20 | 叶荣伟 | A kind of elevator and its control method with Auxiliary Control Element |
| JP6578253B2 (en) * | 2016-07-04 | 2019-09-18 | 株式会社日立製作所 | Elevator system |
| EP3323761B1 (en) * | 2016-11-16 | 2023-11-15 | Kone Corporation | Method, elevator control unit and elevator for moving an elevator car to landing floor in case of event related to main electrical power supply of the elevator |
| CN110621603B (en) * | 2017-05-18 | 2021-09-14 | 三菱电机株式会社 | Control device for elevator |
| CN109720949A (en) * | 2017-10-30 | 2019-05-07 | 上海三菱电梯有限公司 | Elevator power supply system |
| CN114873415B (en) * | 2022-06-07 | 2023-06-02 | 日立楼宇技术（广州）有限公司 | New energy elevator electric multi-drive system and new energy elevator |
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| CN101340106A (en) | 2009-01-07 |
| JP2009012929A (en) | 2009-01-22 |
| JP5240684B2 (en) | 2013-07-17 |
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