EP0703182A2 - Energy saving device for an elevator - Google Patents
Energy saving device for an elevator Download PDFInfo
- Publication number
- EP0703182A2 EP0703182A2 EP95114463A EP95114463A EP0703182A2 EP 0703182 A2 EP0703182 A2 EP 0703182A2 EP 95114463 A EP95114463 A EP 95114463A EP 95114463 A EP95114463 A EP 95114463A EP 0703182 A2 EP0703182 A2 EP 0703182A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- elevator
- battery
- energy
- direct voltage
- converter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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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
- B66B1/28—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical
- B66B1/30—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical effective on driving gear, e.g. acting on power electronics, on inverter or rectifier controlled motor
- B66B1/302—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical effective on driving gear, e.g. acting on power electronics, on inverter or rectifier controlled motor for energy saving
-
- 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
- B66B1/28—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical
- B66B1/30—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical effective on driving gear, e.g. acting on power electronics, on inverter or rectifier controlled motor
- B66B1/308—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical effective on driving gear, e.g. acting on power electronics, on inverter or rectifier controlled motor with AC powered elevator drive
Definitions
- the present invention relates to a system as defined in the preamble of claim 1 for saving energy in an elevator.
- a three-phase mains voltage is applied to a frequency converter 15 consisting of a rectifier 3, an inverter bridge 2 and an intermediate circuit 4,10,11 connected between these.
- a frequency converter 15 consisting of a rectifier 3, an inverter bridge 2 and an intermediate circuit 4,10,11 connected between these.
- the inverter bridge 2 converts the alternating voltage supplied by the drive motor 1 into a direct voltage, which is applied to the conductors 10 and 11 of the intermediate circuit 4,10,11.
- a direct voltage converter 5 a battery 6 is charged with this voltage. In the solution of the invention, only one battery 6 is needed.
- the power generated by the braking operation in frequency converter driven elevators (the voltage is about 650V and the current 1...3 A) is converted by means of a chopper type direct voltage converter 5 to a level of approx. 30V / 20...50A, which is well suited as a power source for an elevator and for the charging of 24V batteries.
- 'Chopper type converter' means a transformer implemented using semiconductors and small-size ferrite core transformers which has an efficiency comparable to that of a transformer but which provides a better degree of regulation.
- the same direct voltage converter 5 is used to supply power to the whole control system.
- the direct voltage converter 5 can be used to produce a raised voltage for the elevator's safety circuit, which consists of door contactors and other safety switches and prevents the elevator from starting when the doors are open or it is otherwise hazardous to set the elevator in motion.
- the elevator acts as an energy source, charging the battery 6 with a large current of 20...50A, and during approx. 80% of the time the the energy stored in the battery 6 is used to supply power to the control equipment of the elevator, the control system, the brake and the signalling etc. Energy is supplied e.g. to the elevator control unit, identified by number 7 in the figure. This control unit needs a significant amount of electric energy.
- the brake 8 of the elevator refers in the first place to the braking electromagnet, which also consumes quite a deal of energy
- elevator lighting 9 refers in the first place to the car light, which generally requires a battery as a reserve power source.
- the capacitor 4 reduces high-frequency noise passed to the mains network.
- the energy generated during braking is converted to a lower voltage and supplied to elevator equipment as specified above and to the battery 6.
- operation is almost the same as above but the power is taken from the electric network.
- the transmission of braking energy into the battery 6 is controlled by adjusting the voltage to a suitable level. Voltage control also ensures that the battery 6 has a sufficient voltage.
- Another feature of the invention is that it integrates the power sources of the elevator's drive and control systems into a single whole. So far, these have been separate from each other, which has caused additional expenses and problems relating to quality and disturbances.
- reserve power operation of the elevator can be implemented so as to allow the elevator to be driven at a reduced speed for a few hours.
Landscapes
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Elevator Control (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
Description
- The present invention relates to a system as defined in the preamble of
claim 1 for saving energy in an elevator. - In normal volume elevators, there have not been any energy saving systems so far, but the elevator's braking energy has been dissipated in a brake resistor. At present, the standard solution is to use a frequency converter drive that passes the braking energy to a resistor. This system is relatively expensive and it involves problems relating to quality and disturbances. To provide a solution to the problem and to eliminate the drawbacks mentioned, a new type of a system for saving energy in an elevator is presented as an invention. The system of the invention is characterized by what is presented in the characterization part of
claim 1. Other embodiments of the invention are characterized by the features presented in the other claims. - The invention allows the following advantages to be achieved:
- The system is cheaper ad less disturbance-prone than a frequency converter that returns braking energy into the mains network
- Reserve power operation can be implemented without significant expenses
- Lighting, signalling and remote supervision can remain operative during a power failure
- A saving of about 20...30 % on energy is achieved in a geared elevator and about 50...60 % in a gearless one as compared to a frequency converter drive that returns braking energy into the mains network, which is currently the standard solution
- Eliminates the problems associated with returning energy into the mains network
- Improved efficiency
- Fig. 1 presents a simplified circuit as provided by the invention.
- In Fig. 1, a three-phase mains voltage is applied to a
frequency converter 15 consisting of arectifier 3, aninverter bridge 2 and anintermediate circuit conductors intermediate voltage circuit drive motor 1, which is operating as a generator. Theinverter bridge 2 converts the alternating voltage supplied by thedrive motor 1 into a direct voltage, which is applied to theconductors intermediate circuit direct voltage converter 5, abattery 6 is charged with this voltage. In the solution of the invention, only onebattery 6 is needed. The power generated by the braking operation in frequency converter driven elevators (the voltage is about 650V and the current 1...3 A) is converted by means of a chopper typedirect voltage converter 5 to a level of approx. 30V / 20...50A, which is well suited as a power source for an elevator and for the charging of 24V batteries. 'Chopper type converter' means a transformer implemented using semiconductors and small-size ferrite core transformers which has an efficiency comparable to that of a transformer but which provides a better degree of regulation. The samedirect voltage converter 5 is used to supply power to the whole control system. - The
direct voltage converter 5 can be used to produce a raised voltage for the elevator's safety circuit, which consists of door contactors and other safety switches and prevents the elevator from starting when the doors are open or it is otherwise hazardous to set the elevator in motion. During approx. 20% of the travelling time, the elevator acts as an energy source, charging thebattery 6 with a large current of 20...50A, and during approx. 80% of the time the the energy stored in thebattery 6 is used to supply power to the control equipment of the elevator, the control system, the brake and the signalling etc. Energy is supplied e.g. to the elevator control unit, identified bynumber 7 in the figure. This control unit needs a significant amount of electric energy. Thebrake 8 of the elevator refers in the first place to the braking electromagnet, which also consumes quite a deal of energy, andelevator lighting 9 refers in the first place to the car light, which generally requires a battery as a reserve power source. Thecapacitor 4 reduces high-frequency noise passed to the mains network. - The energy generated during braking is converted to a lower voltage and supplied to elevator equipment as specified above and to the
battery 6. When no braking is done, operation is almost the same as above but the power is taken from the electric network. The transmission of braking energy into thebattery 6 is controlled by adjusting the voltage to a suitable level. Voltage control also ensures that thebattery 6 has a sufficient voltage. - Another feature of the invention is that it integrates the power sources of the elevator's drive and control systems into a single whole. So far, these have been separate from each other, which has caused additional expenses and problems relating to quality and disturbances. Using a two-way converter, reserve power operation of the elevator can be implemented so as to allow the elevator to be driven at a reduced speed for a few hours.
- It is obvious to the person skilled in the art that different embodiments of the invention are not restricted to the examples described above, but that they may be varied within the limits defined by the following claims.
Claims (4)
- System for the supply of energy in an elevator, in which system the elevator drive motor (1) is fed by a frequency converter (15) comprising a rectifier (3), an inverter bridge (2) and an intermediate circuit (4,10,11) between them, characterized in that- a direct voltage converter (5) is used to convert a large intermediate voltage to a level suitable for a battery (6) and- the elevator's braking energy is supplied into the battery (6) and- the battery (6) is connected to supply power to other elevator equipment (7,8,9) except the drive motor (1).
- System according to claim 1, characterized in that the direct voltage converter (5) is used for the supply of power to the whole control system.
- System according to claim 2, characterized in that the direct voltage converter (5) is used to produce a raised voltage for the safety circuit.
- System according to any one of the preceding claims, characterized in that the power sources for the drive and control systems are integrated into a single whole.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI944295 | 1994-09-16 | ||
FI944295A FI112008B (en) | 1994-09-16 | 1994-09-16 | Elevator energy saving device |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0703182A2 true EP0703182A2 (en) | 1996-03-27 |
EP0703182A3 EP0703182A3 (en) | 1996-12-04 |
EP0703182B1 EP0703182B1 (en) | 2001-04-04 |
Family
ID=8541384
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95114463A Expired - Lifetime EP0703182B1 (en) | 1994-09-16 | 1995-09-14 | Energy saving device for an elevator |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0703182B1 (en) |
JP (1) | JPH08169653A (en) |
DE (1) | DE69520533T2 (en) |
FI (1) | FI112008B (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0850868A1 (en) * | 1996-12-31 | 1998-07-01 | Inventio Ag | Controlled emergency stop apparatus for elevator |
ES2299310A1 (en) * | 2005-09-22 | 2008-05-16 | David Illescas Romero | System for automatic accumulation of energy for engines, inductive circuits and electrical circuits, has battery system feeding frequency converter and motor, which closes circuit and motor is fed to frequency converter |
WO2008155445A1 (en) * | 2007-06-20 | 2008-12-24 | Kone Corporation | Power control of transport system |
CN101976833A (en) * | 2010-10-31 | 2011-02-16 | 华南理工大学 | System and method for monitoring and managing electric energy of elevator group |
EP2597061A1 (en) * | 2011-11-22 | 2013-05-29 | Industrial de Elevacion, S.A. | Energy saving system for direct current elevators |
US8714286B2 (en) | 2009-12-28 | 2014-05-06 | Sandvik Mining And Construction Oy | Mining vehicle and method for its energy supply |
EP2738130A1 (en) * | 2012-11-30 | 2014-06-04 | Aufzugswerke Schmitt & Sohn GmbH & Co. KG | Lift assembly |
US8955657B2 (en) | 2009-12-28 | 2015-02-17 | Sandvik Mining And Construction Oy | Mining vehicle and method for its energy supply |
CN109088737A (en) * | 2017-06-14 | 2018-12-25 | 上海华为技术有限公司 | A kind of oil machine power-economizing method, relevant device and system |
CN113224808A (en) * | 2021-04-14 | 2021-08-06 | 钟亮 | Novel elevator energy-saving device based on super capacitor |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH1121035A (en) * | 1997-07-04 | 1999-01-26 | Toshiba Corp | Elevator device |
JP4262960B2 (en) * | 2002-10-11 | 2009-05-13 | 東芝エレベータ株式会社 | Elevator lighting equipment |
DE102008002839A1 (en) | 2007-05-08 | 2008-12-18 | Karl-Ludwig Blocher | Energy using method for use in e.g. electrical supply network, involves remote-controlling lift systems from central control station via global system for mobile communication mobile radio, or control and announcement network |
EP3590879A1 (en) * | 2018-07-04 | 2020-01-08 | KONE Corporation | Elevator brake controller with earth fault detection |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5836867A (en) * | 1981-08-25 | 1983-03-03 | 三菱電機株式会社 | Operating device in case of emergency of alternating current elevator |
JPS59203072A (en) * | 1983-05-04 | 1984-11-17 | 三菱電機株式会社 | Controller for alternating current elevator |
JPH05294568A (en) * | 1992-04-22 | 1993-11-09 | Hitachi Ltd | Power supply device for elevator cage |
-
1994
- 1994-09-16 FI FI944295A patent/FI112008B/en active
-
1995
- 1995-09-14 EP EP95114463A patent/EP0703182B1/en not_active Expired - Lifetime
- 1995-09-14 JP JP7236310A patent/JPH08169653A/en active Pending
- 1995-09-14 DE DE69520533T patent/DE69520533T2/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
None |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0850868A1 (en) * | 1996-12-31 | 1998-07-01 | Inventio Ag | Controlled emergency stop apparatus for elevator |
US5893432A (en) * | 1996-12-31 | 1999-04-13 | Inventio Ag | Controlled emergency stop apparatus for elevators |
ES2299310A1 (en) * | 2005-09-22 | 2008-05-16 | David Illescas Romero | System for automatic accumulation of energy for engines, inductive circuits and electrical circuits, has battery system feeding frequency converter and motor, which closes circuit and motor is fed to frequency converter |
WO2008155445A1 (en) * | 2007-06-20 | 2008-12-24 | Kone Corporation | Power control of transport system |
US8053931B2 (en) | 2007-06-20 | 2011-11-08 | Kone Corporation | Power control of transport system |
US8714286B2 (en) | 2009-12-28 | 2014-05-06 | Sandvik Mining And Construction Oy | Mining vehicle and method for its energy supply |
US8955657B2 (en) | 2009-12-28 | 2015-02-17 | Sandvik Mining And Construction Oy | Mining vehicle and method for its energy supply |
CN101976833A (en) * | 2010-10-31 | 2011-02-16 | 华南理工大学 | System and method for monitoring and managing electric energy of elevator group |
EP2597061A1 (en) * | 2011-11-22 | 2013-05-29 | Industrial de Elevacion, S.A. | Energy saving system for direct current elevators |
EP2738130A1 (en) * | 2012-11-30 | 2014-06-04 | Aufzugswerke Schmitt & Sohn GmbH & Co. KG | Lift assembly |
CN109088737A (en) * | 2017-06-14 | 2018-12-25 | 上海华为技术有限公司 | A kind of oil machine power-economizing method, relevant device and system |
CN113224808A (en) * | 2021-04-14 | 2021-08-06 | 钟亮 | Novel elevator energy-saving device based on super capacitor |
Also Published As
Publication number | Publication date |
---|---|
FI112008B (en) | 2003-10-15 |
FI944295A (en) | 1996-03-17 |
FI944295A0 (en) | 1994-09-16 |
EP0703182A3 (en) | 1996-12-04 |
DE69520533T2 (en) | 2001-07-12 |
JPH08169653A (en) | 1996-07-02 |
DE69520533D1 (en) | 2001-05-10 |
EP0703182B1 (en) | 2001-04-04 |
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