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Method for determining speed of electric motor, elevator control unit and computer program product

A technology for elevator control and electric motors, applied in the estimation/correction of motor parameters, elevators in buildings, electric components, etc., can solve problems such as danger, damage to elevators, personal discomfort, etc., and achieve the effect of low risk

Inactive Publication Date: 2017-09-22
KONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

No information available to the operator about the speed of the car other than by visual inspection
[0004] A disadvantage of prior art solutions is that the person manually operating the elevator car lacks information about the speed of the car, so the movement can become uncomfortable or even dangerous for individuals inside the car
There is also a high risk of damaging the elevator due to the fact that the operator is more or less ignorant of the nature of the movement of the elevator car

Method used

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  • Method for determining speed of electric motor, elevator control unit and computer program product
  • Method for determining speed of electric motor, elevator control unit and computer program product
  • Method for determining speed of electric motor, elevator control unit and computer program product

Examples

Experimental program
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Embodiment Construction

[0038] figure 1 An elevator 100 according to an embodiment of the invention is schematically shown. according to figure 1 In the illustrated embodiment, the elevator 100 includes an elevator car 1, an elevator motor 2 (ie, hoist motor 2). figure 1 The hoisting motor 2 in includes a rotor 3 . Elevator 100 may include configuration 4 . The elevator 100 may also comprise an elevator control unit 10 . Elevator 100 may also include an elevator shaft. Shown are the various floors 5A-5C and the corresponding floor doors 6A-6C on each floor 5A-5C. There may also be an electric drive 7 for controlling the operation of the electric motor 2 . The controllable parameters may preferably be at least the rotational speed of the rotor 3 and the power fed / absorbed to the motor 2 .

[0039] exist figure 1 In an embodiment of the present invention, the elevator control unit 10 may be configured to control at least one of the following: the operation of the electric drive 7, the operation...

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PUM

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Abstract

The invention provides a method for determining a speed of an electric motor (2) of an elevator (100) comprising a plurality of phases (30A, 30B, 30C) for supplying electric current to the electric motor (2). The method comprises forming an effective short-circuit between at least two of the plurality of phases (30A, 30B, 30C) of the electric motor (2), determining a short-circuit current, the short-circuit current being the current flowing in the effective short-circuit, and determining the speed of the electric motor (2) based on at least one characteristic of the short-circuit current.

Description

technical field [0001] The present invention generally relates to the technical field of electric motors used in elevators. The invention relates in particular to determining the speed of an elevator's motor, such as a hoisting motor, in the event the elevator's elevator car needs to move due to a stop between two floors or floors. Background technique [0002] In the event of an operational failure of the elevator, for example due to a power failure in the electrical network, an operational failure of a unit controlling the elevator, an opening of a safety circuit or a failure of the battery system, the elevator car may stop between two floors. In such emergency or rescue situations, individuals inside the elevator car are trapped and cannot safely exit the elevator car without assistance. [0003] In an emergency, the elevator car must be manually moved to free an individual trapped in the elevator car. When the elevator brakes are opened, the imbalance between the count...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66B11/04H02P23/14
CPCB66B11/04H02P23/14H02K1/278B66B5/027B66B1/30B66B1/32
Inventor T.科尔霍宁
Owner KONE CORP