EP1154948B1 - Inverter controller for elevator hoist and door motors - Google Patents

Inverter controller for elevator hoist and door motors Download PDF

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Publication number
EP1154948B1
EP1154948B1 EP00919319A EP00919319A EP1154948B1 EP 1154948 B1 EP1154948 B1 EP 1154948B1 EP 00919319 A EP00919319 A EP 00919319A EP 00919319 A EP00919319 A EP 00919319A EP 1154948 B1 EP1154948 B1 EP 1154948B1
Authority
EP
European Patent Office
Prior art keywords
motor
elevator
controller
door
inverter
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.)
Expired - Lifetime
Application number
EP00919319A
Other languages
German (de)
French (fr)
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EP1154948A1 (en
EP1154948A4 (en
Inventor
Masao Iwasa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Otis Elevator Co
Original Assignee
Otis Elevator Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Otis Elevator Co filed Critical Otis Elevator Co
Publication of EP1154948A1 publication Critical patent/EP1154948A1/en
Publication of EP1154948A4 publication Critical patent/EP1154948A4/en
Application granted granted Critical
Publication of EP1154948B1 publication Critical patent/EP1154948B1/en
Anticipated expiration legal-status Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B13/00—Doors, gates, or other apparatus controlling access to, or exit from, cages or lift well landings
    • B66B13/02—Door or gate operation
    • B66B13/14—Control systems or devices
    • B66B13/143—Control systems or devices electrical
    • 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

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  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Elevator Door Apparatuses (AREA)
  • Types And Forms Of Lifts (AREA)
  • Elevator Control (AREA)

Description

TECHNICAL FIELD
This invention involves an elevator in which the elevator hoist motor and the door motor utilize controlled alternating current power.
BACKGROUND
Elevator cars are typically moved by a hoist motor and the car doors are opened and closed by a door motor. The proper voltage and frequency current is provided by a hoist motor inverter to the hoist motor based on instructions from a hoist motor controller, and the proper voltage and frequency current is provided to the door motor by a door motor inverter based on command input from a door motor controller.
There are instances where the hoist motor and the door motor are operated simultaneously to increase a car's operating efficiency. For example, immediately before the car reaches or leaves a floor, the door motor is driven along with the hoist motor. Also, releveling (aligning the floor of the car with the floor at the entrance) may be performed while doors are opened.
Thus, while high performance, general-use elevators may require that the hoist motor and the door motor be driven simultaneously to increase operating efficiency, certain home elevator applications do not require high operating efficiency. For such elevators, the need to provide separate hoist motor inverters and door motor inverters has contributed to the cost of the product.
What is needed is a means for decreasing the overall cost of a home elevator, or the like.
Patents Abstracts of Japan, vol.1998, no. 4, 31 March 1998 & JP 09 323876 A discloses an elevator controller for controlling an elevator door and an elevator hoist motor, the controller having a door inverter unit and an elevator hoist motor inverter unit, wherein, when the door inverter unit is out of order, the door motor is driven by the elevator hoist motor inverter.
Patents Abstracts of Japan, vol.016, no. 519, 26 October 1992 & JP 04 191263 A discloses an elevator controller comprising a controlling means which is loaded with a microcomputer controlling an electric motor for elevating an elevator car and an electric motor for opening and closing an elevator door by receiving elevator control signals from the microcomputer, wherein the controlling means controls a motor driver circuit and the output of the motor driver circuit is connected through an electronic switch either to the electric motor for elevating the elevator car or to the electric motor for opening and closing the elevator door.
SUMMARY OF THE INVENTION
The invention provides means for providing variable frequency alternating current for driving an elevator hoist motor and an elevator door motor, as set forth in claim 1.
In order to accomplish this purpose, this invention is equipped with a hoist motor that moves a car, a door motor that opens and closes the car door or doors, an inverter section that simultaneously controls the voltage and frequency of the current provided to the hoist motor and the door motor, and a control section that sends instructions to this inverter section to control the speed at which the car travels and the speed at which the door opens and closes. It is constituted so that the proper voltage and frequency current will be provided to the hoist motor from the inverter section until the car reaches a floor; and, after the car reaches a floor, the proper voltage and frequency will then be provided to the door motor from the same inverter section.
BRIEF DESCRIPTION OF THE FIGURES
  • Figure 1 is a block diagram that shows one application example of an elevator associated with this invention.
    • DETAILED DESCRIPTION
    Referring to Figure 1, elevator car 1 is driven in a hoistway (not shown) and includes a horizontally sliding door 5 driven by door operator motor 6. The car 1 is positioned vertically by means of a rope 2 attached to the car 1 and suspended from the elevator drive sheave 3a. The rope 2 terminates at its other end at a counter weight 4 which provides a balancing of the vertical forces on the car1. Drive sheave 3a is rotated by hoist motor 3 which turns an intermediate shaft 3b as shown.
    Both the hoist motor 3 and the door motor 6 are variable voltage alternating current motors which may be precisely controlled for speed and position by varying the voltage and frequency of the supplied motor current.
    According to the present invention, three phase variable frequency alternating current is supplied to either the hoist motor 3 or the door motor 6 by a controlled inverter section 8 which receives fixed voltage alternating current from a power source 7, such as an electric utility supply line. The voltage and frequency of the output current 11 from the inverter section 8 is controlled in response to the inputs from a controller 9 as shown in the figure.
    During vertical movement of the elevator car1, doors 5 are closed and the inverter section 8 supplies variable frequency and voltage current to the hoist motor 3, only. The speed and position of the car 1 are controlled by the controller 9 so as to precisely deliver the elevator car, and its passengers, to the desired floor in the building served by the elevator. Upon arriving at the desired floor level, controller door 9 causes the elevator hoist motor 3 the cease operation and initiates a signal 22 to a relay control 10 actuating the power relay 12. Power relay 12 is operated, in response to the actuator 10, to switch the output 11 of the inverter section 8 from the hoist motor 3 to the door motor 6. After the inverter 8 is connected to the door motor 6, controller 9, using a completely different velocity profile, drives the door motor 6 to open the doors to permit ingress and egress of the passengers to the elevator car 1.
    It would be appreciated by those skilled in the art that the control signals provided to the inverter 8 by the controller 9 will differ in response to the controllers selection of either the hoist motor or the door motor for receiving the inverter output 11. Thus, a single inverter 8 and controller 9 may be used to control both a hoist motor 3 and a door motor 6 in an elevator application. Switching relay 11 prevents the simultaneous connection of the hoist motor 3 and the drive motor 6 to the inverter 8.
    The system according to the present invention thus eliminates the need for a second inverter and controller as is known in the prior art, in exchange for the requirement that the single remaining inverter 8 drive only one of the hoist motor and the door motor at a given time.
    In the event the elevator car were to become misleveled during a period of time in which the door motor 6 was in operation or the doors 5 in an open position, a controller 9, sensing the misleveling of the elevator with the desired floor, would direct inverter 8 to power door motor 6 so as to close doors 5, then command actuator 10 to actuate the relay 12 so as to connect the inverter 8 to the hoist motor 3 and disconnect inverter 8 from door motor 6. The controller 9 would then control the inverter 8 so as to drive hoist motor 3 to position the elevator car 1 at the correct position within the hoistway.
    Relay 12, shown here schematically as a mechanical relay having a mechanical actuator 10, may alternatively be an electronic switch or any other device or structure which can divert the output 11 of the inverter section 8 between either the hoist motor 3 or the door motor 6, in response to signal 22 from the controller 9.

    Claims (2)

    1. Means for providing variable frequency alternating current for driving an elevator hoist motor (3) and an elevator door motor (6), comprising:
      a controller (9) for controlling the elevator hoist motor (3) to position an elevator car (1) within a hoistway and for controlling the elevator door motor (6) to open and close an elevator door (5);
      a single inverter section (8) for receiving alternating current from a supply source (7) and delivering variable frequency, variable voltage driving current in response to a control signal received from the controller (9);
      means for switching (23) the variable frequency, variable voltage current delivered by the inverter between the hoist motor (3) or the door motor (6); and
      means (10) responsive to a second signal (22) from the controller (9) for causing the means for switching (23) to connect an inverter output (21) to either the hoist motor (3) or the door motor (6) individually, whereby the controller (9) initiates the second signal (22) upon sensing the elevator car (1) has reached a desired landing to cause the means for switching (23) to connect the inverter output (21) to the door motor (6), and characterised in that the controller (9) initiates the second signal (22) upon sensing the elevator car (1) is misleveled to cause the means for switching (23) to connect the inverter output (21) to the hoist motor (3).
    2. Means as recited in claim 1, wherein the controller (9) includes a first controller profile for use only when the inverter output (21) is connected to the hoist motor (3), and
         a second controller profile for use only when the inverter output (21) is connected to the door motor (6).
    EP00919319A 1999-02-26 2000-02-18 Inverter controller for elevator hoist and door motors Expired - Lifetime EP1154948B1 (en)

    Applications Claiming Priority (3)

    Application Number Priority Date Filing Date Title
    JP11051008A JP2000247553A (en) 1999-02-26 1999-02-26 Elevator
    JP5100899 1999-02-26
    PCT/US2000/004119 WO2000050329A1 (en) 1999-02-26 2000-02-18 Inverter controller for elevator hoist and door motors

    Publications (3)

    Publication Number Publication Date
    EP1154948A1 EP1154948A1 (en) 2001-11-21
    EP1154948A4 EP1154948A4 (en) 2002-10-30
    EP1154948B1 true EP1154948B1 (en) 2004-05-12

    Family

    ID=12874759

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP00919319A Expired - Lifetime EP1154948B1 (en) 1999-02-26 2000-02-18 Inverter controller for elevator hoist and door motors

    Country Status (6)

    Country Link
    EP (1) EP1154948B1 (en)
    JP (1) JP2000247553A (en)
    CN (1) CN1241812C (en)
    DE (1) DE60010668T2 (en)
    ES (1) ES2220453T3 (en)
    WO (1) WO2000050329A1 (en)

    Families Citing this family (2)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    EP1370482A1 (en) * 2001-03-05 2003-12-17 Manfred Schrödl Electric drive
    CN102241356A (en) * 2011-06-28 2011-11-16 杭州优迈科技有限公司 Energy saving method and device for elevator door motor

    Family Cites Families (6)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    JPH04191263A (en) * 1990-11-27 1992-07-09 Mitsubishi Electric Corp Elevator controller
    JPH06153571A (en) * 1992-10-29 1994-05-31 Toshiba Corp Apparatus for controlling container crane
    US6002218A (en) * 1992-11-20 1999-12-14 Fujitsu General Limited Control device for air conditioner
    US5361565A (en) * 1993-01-19 1994-11-08 Bayer Robert F Elevating system
    JP3324932B2 (en) * 1996-06-05 2002-09-17 株式会社東芝 Elevator control device
    US5936375A (en) * 1997-11-05 1999-08-10 Paceco Corp. Method for energy storage for load hoisting machinery

    Also Published As

    Publication number Publication date
    CN1341074A (en) 2002-03-20
    DE60010668D1 (en) 2004-06-17
    ES2220453T3 (en) 2004-12-16
    EP1154948A1 (en) 2001-11-21
    EP1154948A4 (en) 2002-10-30
    JP2000247553A (en) 2000-09-12
    WO2000050329A1 (en) 2000-08-31
    CN1241812C (en) 2006-02-15
    DE60010668T2 (en) 2004-10-07

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