WO2009154618A1 - Dynamic elevator group sizing for energy saving - Google Patents
Dynamic elevator group sizing for energy saving Download PDFInfo
- Publication number
- WO2009154618A1 WO2009154618A1 PCT/US2008/067267 US2008067267W WO2009154618A1 WO 2009154618 A1 WO2009154618 A1 WO 2009154618A1 US 2008067267 W US2008067267 W US 2008067267W WO 2009154618 A1 WO2009154618 A1 WO 2009154618A1
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- WO
- WIPO (PCT)
- Prior art keywords
- elevator
- cars
- fully powered
- current
- powered state
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B1/00—Control systems of elevators in general
- B66B1/24—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration
- B66B1/2408—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration where the allocation of a call to an elevator car is of importance, i.e. by means of a supervisory or group controller
- B66B1/2458—For elevator systems with multiple shafts and a single car per shaft
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B2201/00—Aspects of control systems of elevators
- B66B2201/10—Details with respect to the type of call input
- B66B2201/102—Up or down call input
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B2201/00—Aspects of control systems of elevators
- B66B2201/10—Details with respect to the type of call input
- B66B2201/103—Destination call input before entering the elevator car
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B2201/00—Aspects of control systems of elevators
- B66B2201/20—Details of the evaluation method for the allocation of a call to an elevator car
- B66B2201/241—Standby control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B2201/00—Aspects of control systems of elevators
- B66B2201/40—Details of the change of control mode
- B66B2201/404—Details of the change of control mode by cost function evaluation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B50/00—Energy efficient technologies in elevators, escalators and moving walkways, e.g. energy saving or recuperation technologies
Definitions
- Elevator systems require some form of dispatch control to assign elevator cars to passenger requests for service.
- Traditional elevator systems have included hall call buttons that allow a passenger to indicate a desire to be carried up or down from a particular landing. Once in the car, a car operating panel allows the passenger to indicate the desired destination floor. More recently, destination entry systems have been introduced that allow a passenger to indicate their desired destination prior to entering an elevator car. In either case, a dispatch controller decides which of the available elevator cars will be assigned to respond to the passenger request.
- Various strategies are employed to control how elevator cars are assigned in a dispatching algorithm. Example dispatching strategies are shown in U.S. Patent Nos. 5,248,860; 5,345,049; and 5,831,226. Such dispatching techniques allow for more efficient elevator system usage.
- a typical dormant mode would include the lights and fan associated with the elevator car being turned off to conserve energy.
- An exemplary method of controlling an elevator system having a plurality of elevator cars includes determining a current traffic condition of the elevator system. A determination is made regarding current elevator system performance. A dormant mode of at least one of the elevator cars, which includes at least one associated elevator car component in a reduced power consumption mode, is controlled based upon the determined current traffic condition and the determined current elevator system performance.
- An exemplary elevator system includes a plurality of elevator cars.
- a dispatch controller is configured to determine a current traffic condition of the elevator system, determine a current elevator system performance and control a dormant mode of at least one of the elevator cars, which includes at least one associated elevator car component in a reduced power consumption mode, based upon the determined current traffic condition and the determined current elevator system performance.
- Figure 1 schematically illustrates selected portions of an elevator system incorporating an embodiment of this invention.
- Figure 2 is a flowchart diagram schematically illustrating an example approach.
- FIG. 1 schematically shows selected portions of an elevator system 20.
- a dispatch controller 22 communicates with a car controller 24 that controls operation of an elevator car 26.
- the dispatch controller 22 also communicates with a car controller 28 associated with a car 30, a car controller 32 associated with a car 34 and a car controller 36 associated with a car 38.
- the dispatch controller 22 responds to passenger requests for service by assigning a particular one of the elevator cars 26, 30, 34 or 38 to service a particular request.
- the dispatch controller 22 is configured to respond to a destination entry device 40 that allows a passenger to indicate a desired destination prior to entering one of the elevator cars.
- the example dispatch controller 22 is also capable of responding to a passenger service request placed at a hall fixture 42 having a hall call button for indicating a desire to travel up or down from a particular floor, for example.
- the example dispatch controller 22 is configured to determine a current traffic condition of the elevator system 20.
- the dispatch controller 22 also is configured to determine a current elevator system performance level.
- the dispatch controller 22 controls how many elevator cars are in a group considered candidates to service a passenger request by controlling a dormant mode of at least one of the elevator cars 26, 30, 34 and 38 based upon the determined current traffic condition and the determined current elevator system performance.
- the dormant mode of the elevator car includes at least one associated elevator car component being in a reduced power consumption mode. In the example of Figure 1, each of the elevator cars includes a fan 44 and a light 46.
- FIG. 1 includes a flowchart diagram 50 summarizing an example approach by which the dispatch controller 22 controls the amount of power consumption of the elevator system 20 by controlling whether the various elevator cars are in a fully powered state or in a dormant mode.
- the dispatch controller 22 monitors the traffic and performance of the elevator system.
- One example includes using a passenger counter to determine a current traffic condition.
- Another example includes using hall call placements and estimations of associated numbers of passengers.
- Another example includes using load weight monitors as indication of an amount of traffic.
- Another example includes using the percentage of time that the elevator cars spend serving demand compared to the percentage of time spent idle. The selection of how to determine a current traffic condition may include more than one of these example techniques. Those skilled in the art who have the benefit of this description will be able to select appropriate traffic condition determination techniques to meet the needs of their particular situation. [oooi7]
- the dispatch controller 22 also determines the current elevator performance.
- Tracking a particular performance metric or a combination of relevant metrics allows the dispatch controller 22 to determine whether the elevator performance satisfies a selected criterion. For example, elevator performance may be measured based upon an average wait time for passengers to be picked up responsive to a request for service. Other performance metrics include service times and car registration times, for example. In one example, the dispatch controller 22 is configured to determine whether a current elevator performance is within an acceptable range, above or below the acceptable range.
- the dispatch controller 22 determines whether the performance of the elevator system is acceptable (e.g., whether a selected criterion is satisfied). If the elevator performance is at least acceptable, a determination is made at 56 whether an acceptable level of performance can still be achieved with fewer cars than are currently fully powered and active. Given the current traffic level, the current performance level and the number of cars that are fully powered, a determination is made at 58 whether one or more of the elevator cars could be placed into a dormant mode where at least one elevator car component is turned off or the elevator car is effectively shut down. In one example, once the passenger demand and population values are determined, a five minute handling capacity using known formulas is calculated. Using this information and desired wait time and service time metrics, the determination is made at 58.
- the dispatch controller 22 determines if one or more of the elevator cars can be placed into a dormant mode. If so, at 60 at least one of the elevator cars is shut down or placed in the dormant mode. [00019] If the determination at 54 is that the elevator system performance is not acceptable, a determination is made at 62 whether any of the elevator cars are currently in a dormant mode or shut down. If not, there are no changes to make regarding how many cars are in a fully powered state because all cars that could be available are currently being used to attempt to service the current traffic load to satisfy the selected criterion regarding elevator performance.
- a configurable value e.g., twenty seconds
- an elevator car that is currently in a dormant mode is not considered as a candidate for responding to a passenger request unless a determination is made that the currently available elevator cars (i.e., those already in a fully powered state) are not enough to service pending requests and keep the elevator performance at an acceptable level.
- the disclosed examples allow an elevator car that is currently in a dormant mode to remain that way as long as practical, which enhances energy conservation.
- the disclosed examples are different than prior techniques that did not discriminate between cars for purposes of assigning them to service passenger requests based on whether they were currently in a dormant mode. Additionally, the disclosed examples allow for sizing the group of elevator cars currently considered available to service a current traffic load (i.e., determining how many cars to keep in a fully powered state) based upon the current traffic and elevator performance levels. This allows for turning off more elevator car components under some circumstances compared to previous arrangements that rely purely on timers for deciding when an elevator car could be considered idle and placed in a dormant mode.
- the enhanced power control strategy of the disclosed examples can provide additional energy conservation without sacrificing elevator system performance.
- the disclosed example techniques are useful alone or in combination with timer-based control over whether an elevator car enters a dormant mode.
Abstract
An exemplary method of controlling an elevator system having a plurality of elevator cars includes determining a current traffic condition of the elevator system. A determination is made regarding a current elevator system performance. A dormant mode of at least one of the elevator cars including at least one associated elevator car component in a reduced power consumption mode is controlled based upon the determined current traffic condition and the determined current elevator system performance.
Description
DYNAMIC ELEVATOR GROUP SIZING FOR ENERGY SAVING
BACKGROUND
[0001] Elevator systems require some form of dispatch control to assign elevator cars to passenger requests for service. Traditional elevator systems have included hall call buttons that allow a passenger to indicate a desire to be carried up or down from a particular landing. Once in the car, a car operating panel allows the passenger to indicate the desired destination floor. More recently, destination entry systems have been introduced that allow a passenger to indicate their desired destination prior to entering an elevator car. In either case, a dispatch controller decides which of the available elevator cars will be assigned to respond to the passenger request. [0002] Various strategies are employed to control how elevator cars are assigned in a dispatching algorithm. Example dispatching strategies are shown in U.S. Patent Nos. 5,248,860; 5,345,049; and 5,831,226. Such dispatching techniques allow for more efficient elevator system usage.
[0003] One issue of concern is how much energy an elevator system consumes. Proposed elevator dispatching techniques have taken into account an amount of energy consumed. Examples are described in U.S. Patent Nos. 6,857,506 and 7,032,715.
[0004] One way in which elevator systems have traditionally saved energy is to place an elevator car into a dormant mode when the elevator car remains idle for a selected period of time. A typical dormant mode would include the lights and fan associated with the elevator car being turned off to conserve energy.
[0005] One shortcoming of previous dispatching algorithms is that they do not account for whether a car is in a dormant mode or a fully powered state when determining whether to assign a particular passenger request to that car. If a car is in the dormant mode and has to be turned back on to respond to a service request, that involves consuming additional energy. It would be useful, for example, to be able to keep an elevator car dormant as long as possible to maximize energy conservation.
SUMMARY
[0006] An exemplary method of controlling an elevator system having a plurality of elevator cars includes determining a current traffic condition of the elevator system. A determination is made regarding current elevator system performance. A dormant mode of at least one of the elevator cars, which includes at least one associated elevator car component in a reduced power consumption mode, is controlled based upon the determined current traffic condition and the determined current elevator system performance.
[0007] An exemplary elevator system includes a plurality of elevator cars. A dispatch controller is configured to determine a current traffic condition of the elevator system, determine a current elevator system performance and control a dormant mode of at least one of the elevator cars, which includes at least one associated elevator car component in a reduced power consumption mode, based upon the determined current traffic condition and the determined current elevator system performance.
[0008] Controlling whether an elevator car is in a dormant mode based upon the current traffic and performance conditions allows for enhancing energy conservation.
[0009] The various features and advantages of the disclosed examples will become apparent to those skilled in the art from the following detailed description. The drawings that accompany the detailed description can be briefly described as follows.
BRIEF DESCRIPTION OF THE DRAWINGS [00010] Figure 1 schematically illustrates selected portions of an elevator system incorporating an embodiment of this invention.
[00011] Figure 2 is a flowchart diagram schematically illustrating an example approach.
DETAILED DESCRIPTION
[oooi2] Figure 1 schematically shows selected portions of an elevator system 20. A dispatch controller 22 communicates with a car controller 24 that controls operation of an elevator car 26. The dispatch controller 22 also communicates with a
car controller 28 associated with a car 30, a car controller 32 associated with a car 34 and a car controller 36 associated with a car 38.
[oooi3] The dispatch controller 22 responds to passenger requests for service by assigning a particular one of the elevator cars 26, 30, 34 or 38 to service a particular request. In the example of Figure 1, the dispatch controller 22 is configured to respond to a destination entry device 40 that allows a passenger to indicate a desired destination prior to entering one of the elevator cars. The example dispatch controller 22 is also capable of responding to a passenger service request placed at a hall fixture 42 having a hall call button for indicating a desire to travel up or down from a particular floor, for example.
[oooi4] The example dispatch controller 22 is configured to determine a current traffic condition of the elevator system 20. The dispatch controller 22 also is configured to determine a current elevator system performance level. The dispatch controller 22 controls how many elevator cars are in a group considered candidates to service a passenger request by controlling a dormant mode of at least one of the elevator cars 26, 30, 34 and 38 based upon the determined current traffic condition and the determined current elevator system performance. When an elevator car is dormant, it is not considered a member of the group of available or candidate cars for handling current traffic demands. [oooi5] The dormant mode of the elevator car includes at least one associated elevator car component being in a reduced power consumption mode. In the example of Figure 1, each of the elevator cars includes a fan 44 and a light 46. In a dormant mode, at least one of the fan 44 or the light 46 is placed in a reduced power mode. In some examples, the fan 44 and light 46 will be turned off in the dormant mode. In some examples, the dormant mode of an elevator car includes completely shutting down the elevator car and placing the associated controller 24, 28, 32 or 36 in a sleep mode, for example. Given this description, those skilled in the art will realize how to configure a dormant mode for an elevator car to best meet the needs of their particular situation. [00016] Figure 2 includes a flowchart diagram 50 summarizing an example approach by which the dispatch controller 22 controls the amount of power consumption of the elevator system 20 by controlling whether the various elevator cars are in a fully powered state or in a dormant mode. As indicated at 52, the dispatch controller 22 monitors the traffic and performance of the elevator system.
One example includes using a passenger counter to determine a current traffic condition. Another example includes using hall call placements and estimations of associated numbers of passengers. Another example includes using load weight monitors as indication of an amount of traffic. Another example includes using the percentage of time that the elevator cars spend serving demand compared to the percentage of time spent idle. The selection of how to determine a current traffic condition may include more than one of these example techniques. Those skilled in the art who have the benefit of this description will be able to select appropriate traffic condition determination techniques to meet the needs of their particular situation. [oooi7] At 52, the dispatch controller 22 also determines the current elevator performance. Tracking a particular performance metric or a combination of relevant metrics allows the dispatch controller 22 to determine whether the elevator performance satisfies a selected criterion. For example, elevator performance may be measured based upon an average wait time for passengers to be picked up responsive to a request for service. Other performance metrics include service times and car registration times, for example. In one example, the dispatch controller 22 is configured to determine whether a current elevator performance is within an acceptable range, above or below the acceptable range.
[00018] At 54, the dispatch controller 22 determines whether the performance of the elevator system is acceptable (e.g., whether a selected criterion is satisfied). If the elevator performance is at least acceptable, a determination is made at 56 whether an acceptable level of performance can still be achieved with fewer cars than are currently fully powered and active. Given the current traffic level, the current performance level and the number of cars that are fully powered, a determination is made at 58 whether one or more of the elevator cars could be placed into a dormant mode where at least one elevator car component is turned off or the elevator car is effectively shut down. In one example, once the passenger demand and population values are determined, a five minute handling capacity using known formulas is calculated. Using this information and desired wait time and service time metrics, the determination is made at 58. For example, if the average passenger wait time is less than a configurable value (e.g., twenty seconds), the dispatch controller 22 determines if one or more of the elevator cars can be placed into a dormant mode. If so, at 60 at least one of the elevator cars is shut down or placed in the dormant mode.
[00019] If the determination at 54 is that the elevator system performance is not acceptable, a determination is made at 62 whether any of the elevator cars are currently in a dormant mode or shut down. If not, there are no changes to make regarding how many cars are in a fully powered state because all cars that could be available are currently being used to attempt to service the current traffic load to satisfy the selected criterion regarding elevator performance.
[00020] If, on the other hand, some of the elevator cars are currently in a dormant mode, a determination is made at 64 based on the current traffic level to decide how many of the elevator cars should be in a fully powered state. This may result in turning on an elevator car that is currently turned off, for example. Using handling capacity equations as known allows for determining how many cars are needed for a given current traffic load or a desired handling capacity for deciding how many cars ideally would be in a fully powered state for servicing the current traffic. In Figure 2, at 66, at least one of the elevator cars is switched from a dormant mode to a fully powered state.
[00021] In the above-described examples, an elevator car that is currently in a dormant mode is not considered as a candidate for responding to a passenger request unless a determination is made that the currently available elevator cars (i.e., those already in a fully powered state) are not enough to service pending requests and keep the elevator performance at an acceptable level. By first choosing cars that are already in a fully powered state, the disclosed examples allow an elevator car that is currently in a dormant mode to remain that way as long as practical, which enhances energy conservation.
[00022] The disclosed examples are different than prior techniques that did not discriminate between cars for purposes of assigning them to service passenger requests based on whether they were currently in a dormant mode. Additionally, the disclosed examples allow for sizing the group of elevator cars currently considered available to service a current traffic load (i.e., determining how many cars to keep in a fully powered state) based upon the current traffic and elevator performance levels. This allows for turning off more elevator car components under some circumstances compared to previous arrangements that rely purely on timers for deciding when an elevator car could be considered idle and placed in a dormant mode. The enhanced power control strategy of the disclosed examples can provide additional energy conservation without sacrificing elevator system performance.
[00023] The disclosed example techniques are useful alone or in combination with timer-based control over whether an elevator car enters a dormant mode.
[00024] The preceding description is exemplary rather than limiting in nature. Variations and modifications to the disclosed examples may become apparent to those skilled in the art that do not necessarily depart from the essence of this invention. The scope of legal protection given to this invention can only be determined by studying the following claims.
Claims
I claim: 1. A method of controlling an elevator system having a plurality of elevator cars, comprising the steps of: determining a current traffic condition of the elevator system; determining a current elevator system performance; and controlling a dormant mode of at least one of the elevator cars including at least one associated elevator car component in a reduced power consumption mode based upon the determined current traffic condition and the determined current elevator system performance.
2. The method of claim 1, wherein controlling the power consumption level comprises controlling whether the at least one of the elevator cars remains in the dormant mode or is switched to a fully powered state.
3. The method of claim 1, wherein the reduced power consumption mode comprises the at least one elevator car being shut down.
4. The method of claim 1, wherein the reduced power consumption mode comprises the associated elevator component being turned off.
5. The method of claim 4, wherein the associated elevator component comprises at least one of a light or fan in the at least one elevator car.
6. The method of claim 1, comprising determining whether the current elevator system performance level satisfies a selected criterion; and changing a power consumption level of the at least one of the elevator cars responsive to whether the selected criterion is satisfied.
7. The method of claim 6, comprising determining how many elevator cars need to be in a fully powered state to satisfy the selected criterion based on the current traffic condition; increasing a number of elevator cars in the fully powered state if the current traffic condition requires more elevator cars than are currently in the fully powered state to satisfy the selected criterion; and increasing a number of elevator cars in the dormant mode if the current traffic condition requires fewer elevator cars than are currently in the fully powered state to satisfy the selected criterion.
8. The method of claim 1, comprising assigning a passenger request to an elevator car that is currently in fully powered mode before assigning the passenger request to an elevator car that is currently in the dormant mode.
9. The method of claim 1, comprising changing a number of the elevator cars in a fully powered state from a current number to a different number responsive to determining that the current elevator traffic requires the different number of cars for the elevator system performance to satisfy a selected criterion.
10. The method of claim 9, comprising one of increasing or decreasing the number of elevator cars in the fully powered state.
11. An elevator system, comprising: a plurality of elevator cars; and a dispatch controller that is configured to determine a current traffic condition of the elevator system; determine a current elevator system performance; and control a dormant mode of at least one of the elevator cars including at least one associated elevator car component in a reduced power consumption mode based upon the determined current traffic condition and the determined current elevator system performance.
12. The system of claim 11, wherein the controller controls whether the at least one of the elevator cars remains in the dormant mode or is switched to a fully powered state.
13. The system of claim 11, wherein the reduced power consumption mode comprises the at least one elevator car being shut down.
14. The system of claim 11, wherein the reduced power consumption mode comprises the associated elevator component being turned off.
15. The system of claim 14, wherein the associated elevator component comprises at least one of a light or fan.
16. The system of claim 11, wherein the controller is configured to determine whether the current elevator system performance level satisfies a selected criterion; and change a power consumption level of the at least one of the elevator cars responsive to whether the selected criterion is satisfied.
17. The system of claim 16, wherein the controller is configured to determine how many elevator cars need to be in a fully powered state to satisfy the selected criterion based on the current traffic condition; increase a number of elevator cars in the fully powered state if the current traffic condition requires more elevator cars than are currently in the fully powered state to satisfy the selected criterion; and increase a number of elevator cars in the dormant mode if the current traffic condition requires fewer elevator cars than are currently in the fully powered state to satisfy the selected criterion.
18. The system of claim 11, wherein the controller is configured to assign a passenger request to an elevator car that is currently in fully powered mode before assigning the passenger request to an elevator car that is currently in the dormant mode.
19. The system of claim 11, wherein the controller is configured to change a number of the elevator cars in a fully powered state from a current number to a different number responsive to determining that the current elevator traffic requires the different number of cars for the elevator system performance to satisfy a selected criterion.
20. The system of claim 19, wherein the controller changes the number of the elevator cars in the fully powered state by one of increasing or decreasing the number of elevator cars in the fully powered state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/US2008/067267 WO2009154618A1 (en) | 2008-06-18 | 2008-06-18 | Dynamic elevator group sizing for energy saving |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/US2008/067267 WO2009154618A1 (en) | 2008-06-18 | 2008-06-18 | Dynamic elevator group sizing for energy saving |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2009154618A1 true WO2009154618A1 (en) | 2009-12-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US2008/067267 WO2009154618A1 (en) | 2008-06-18 | 2008-06-18 | Dynamic elevator group sizing for energy saving |
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| WO (1) | WO2009154618A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013176670A1 (en) * | 2012-05-24 | 2013-11-28 | Otis Elevator Company | Adaptive power control for elevator system |
| US20190322482A1 (en) * | 2018-04-24 | 2019-10-24 | Otis Elevator Company | Automatic cognitive analysis of elevators to reduce passenger wait time |
| US10604378B2 (en) | 2017-06-14 | 2020-03-31 | Otis Elevator Company | Emergency elevator power management |
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|---|---|---|---|---|
| EP0662443A2 (en) * | 1994-01-10 | 1995-07-12 | Otis Elevator Company | Elevator swing car assignment to plural groups |
| JP2004083151A (en) * | 2002-08-23 | 2004-03-18 | Mitsubishi Electric Corp | Control device for elevator |
| WO2005080247A1 (en) * | 2004-01-29 | 2005-09-01 | Otis Elevator Company | Energy saving elevator dispatching |
| EP1876129A1 (en) * | 2006-06-12 | 2008-01-09 | Inventio Ag | Method and device to reduce the energy consumption of an elevator. |
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2008
- 2008-06-18 WO PCT/US2008/067267 patent/WO2009154618A1/en active Application Filing
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0662443A2 (en) * | 1994-01-10 | 1995-07-12 | Otis Elevator Company | Elevator swing car assignment to plural groups |
| JP2004083151A (en) * | 2002-08-23 | 2004-03-18 | Mitsubishi Electric Corp | Control device for elevator |
| WO2005080247A1 (en) * | 2004-01-29 | 2005-09-01 | Otis Elevator Company | Energy saving elevator dispatching |
| EP1876129A1 (en) * | 2006-06-12 | 2008-01-09 | Inventio Ag | Method and device to reduce the energy consumption of an elevator. |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013176670A1 (en) * | 2012-05-24 | 2013-11-28 | Otis Elevator Company | Adaptive power control for elevator system |
| CN104334486A (en) * | 2012-05-24 | 2015-02-04 | 奥的斯电梯公司 | Adaptive power control for elevator system |
| US9908743B2 (en) | 2012-05-24 | 2018-03-06 | Otis Elevator Company | Adaptive power control for elevator system using power profiles |
| US10604378B2 (en) | 2017-06-14 | 2020-03-31 | Otis Elevator Company | Emergency elevator power management |
| US20190322482A1 (en) * | 2018-04-24 | 2019-10-24 | Otis Elevator Company | Automatic cognitive analysis of elevators to reduce passenger wait time |
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