KR101754972B1 - Safety circuit for elevator muting noise - Google Patents

Safety circuit for elevator muting noise Download PDF

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Publication number
KR101754972B1
KR101754972B1 KR1020150126045A KR20150126045A KR101754972B1 KR 101754972 B1 KR101754972 B1 KR 101754972B1 KR 1020150126045 A KR1020150126045 A KR 1020150126045A KR 20150126045 A KR20150126045 A KR 20150126045A KR 101754972 B1 KR101754972 B1 KR 101754972B1
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KR
South Korea
Prior art keywords
power supply
elevator
magnetic contactor
driving power
power
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Application number
KR1020150126045A
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Korean (ko)
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KR20170029123A (en
Inventor
김병우
Original Assignee
주식회사 나우테크
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Priority to KR1020150126045A priority Critical patent/KR101754972B1/en
Publication of KR20170029123A publication Critical patent/KR20170029123A/en
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Publication of KR101754972B1 publication Critical patent/KR101754972B1/en

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    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B1/00—Control systems of elevators in general
    • B66B1/34—Details, e.g. call counting devices, data transmission from car to control system, devices giving information to the control system
    • B66B1/3415—Control system configuration and the data transmission or communication within the control system

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  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Elevator Control (AREA)

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator safety circuit for allowing an elevator to operate safely, and more particularly, To an elevator safety circuit.
An elevator safety circuit for reducing operation noise according to the present invention comprises: a magnetic contactor for opening / closing a power supply line for supplying driving power to a traction machine for raising and lowering a car of an elevator; A power supply for supplying driving power to the magnetic contactor; A control switch for controlling supply of driving power to the power supply unit under the control of a controller of the elevator; And an on-noise reduction unit for gradually increasing an initial driving power supplied by the power supply unit by turning on the control switch.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to elevator safety circuits,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator safety circuit for allowing an elevator to operate safely, and more particularly, To an elevator safety circuit.

An elevator installed on a building is very useful as a mechanism for facilitating the movement of people or cargo between layers easily and quickly.

An elevator is a device that carries people or cargo and requires strict safety requirements. Therefore, the elevator is equipped with various safety devices.

For reference, in the prior art relating to the stabilizing device provided in the elevator, the elevator emergency stop device is disclosed in Japanese Patent No. 10-1457616 entitled " Elevator safety device and its braking method ", Japanese Patent Application Laid-open No. 10-2003-0069512 10-2006-0059871 "Elevator safety device and its operation test method" and the like have been disclosed.

Among the safety devices provided in the elevator, there is a safety circuit that prevents the traction machine from malfunctioning by opening and closing the power supply line for supplying driving power to the traction machine for raising and lowering the elevator car according to the safety condition.

The elevator includes a car on which a person or a cargo is carried, a wire rope connected to the car, a hoisting machine for rotating the hoisting rope by pulling or loosening the wire rope so as to move up and down the hoisting rope, And a controller for controlling the power supply and the like,

The safety circuit is provided in a power supply line that electrically connects the power supply and the traction machine and supplies driving power output from the power supply to the traction machine.

When the elevator is in a stopped state, the power supply line is opened to prevent a safety accident by preventing the power supply from being supplied even if the power supply operates abnormally. When the elevator is operated, it is checked that all the safety conditions are satisfied The power supply line is closed and the driving power is supplied to the traction machine to prevent a safety accident and if the emergency state occurs during the operation of the elevator, the power line is opened so that the car of the elevator is stopped in an emergency, .

The safety circuit includes a main contact that opens and closes a power supply line. A magnetic contactor is used as the main contact to electrically open and close the power supply line electrically and reliably shut off the driving power of the power supply.

Wherein the magnetic contactor comprises: a coil for generating an electromagnetic force when power is supplied; a switch block having an open / close switch which moves by an electromagnetic force generated from the coil to close the power supply line; A spring that pushes the switch block to open the power supply line, and a housing that houses the switch.

The magnetic contactor thus constructed generates noise when the switch block is moved by the electromagnetic force and the spring of the coil to move away from the mechanical structure.

Thus, the noise generated when the magnetic contactor is operated is a level that can not be ignored and deteriorates the residential environment of the residents around the machine room where the magnetic contactor is installed.

Thus, there is a need to improve the residential environment by reducing the noise of the magnetic contactor generated every time the elevator is operated, but such prior art is not yet disclosed.

It is an object of the present invention to provide an elevator safety circuit capable of reducing noise generated in a safety circuit provided for safe operation of an elevator and improving the residential environment of a resident of the surrounding area.

An elevator safety circuit for reducing operation noise according to the present invention for achieving the above object

A magnetic contactor for opening / closing a power line for supplying driving power to a traction machine for moving up and down a car of an elevator;

A power supply for supplying driving power to the magnetic contactor;

A control switch for controlling supply of driving power to the power supply unit under the control of a controller of the elevator;

And an on-noise reduction unit for gradually increasing an initial driving power supplied by the power supply unit by turning on the control switch.

And an off-noise reduction unit for generating a counter electromotive force from the magnetic contactor and gradually reducing the power when the control switch is turned off to interrupt the supply of driving power to the power supply unit.

Wherein the off-noise reduction unit comprises a diode, a capacitor, and a resistor that form a closed loop through which a counter-electromotive force generated by being connected in parallel to the magnetic contactor flows,

And the on-noise reduction unit is an NTC element provided on a power supply line for supplying the driving power of the power supply unit to the magnetic contactor.

An elevator safety circuit for reducing operation noise according to the present invention is constructed such that when the control switch is turned on and off for the operation of the magnetic contactor, the switch block of the magnetic contactor smoothly moves, Which is a useful technology for industrial development.

1 is a circuit diagram of an elevator safety circuit for reducing operational noise according to the present invention;
2 is a circuit diagram according to another embodiment of an elevator safety circuit for reducing operational noise according to the present invention;
3 is an example of a circuit for protecting an NTC device used as an on-noise reduction unit in an elevator safety circuit for reducing operation noise according to the present invention.

Hereinafter, an elevator safety circuit for reducing operation noise according to the present invention will be described in detail with reference to the drawings.

Before describing the present invention in more detail with reference to the drawings,

While the present invention has been described in connection with certain embodiments, it is obvious that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

In the drawings, the same reference numerals are used for the same reference numerals, and in particular, the digits of the tens and the digits of the digits, the digits of the digits, the digits of the digits and the alphabets are the same, Members referred to by reference numerals can be identified as members corresponding to these standards.

In the drawings, the components are expressed by exaggeratingly larger (or thicker) or smaller (or thinner) in size or thickness in consideration of the convenience of understanding, etc. However, It should not be.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the term " comprising " or " consisting of ", or the like, refers to the presence of a feature, a number, a step, an operation, an element, a component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

As shown in the drawings, the elevator safety circuit according to the present invention

A power supply line 1 for electrically connecting a traction machine TM for raising and lowering the elevator car and a power supply PS for supplying driving power to the traction machine TM, The power supply line 1,

And includes a magnetic contactor MC, a power supply V, a control switch SAR, safety switches SW1, SW2 and SW3, a warm noise reduction unit NTC and an off noise reduction unit D or R and C .

For reference, a magnetic contactor MC (which may be a safety circuit including a magnetic contactor MC) that opens and closes a power supply line 1 connecting a traction machine TM and a power supply PS, It is equipped for double prevention to prevent safety accidents.

The magnetic contactor MC includes a coil L1 for generating an electromagnetic force when an electric power is applied and a coil L1 for closing the power line 1 by an electromagnetic force generated in the coil L1, And an open / close switch S1 for opening the power supply line 1.

The magnetic contactor MC includes a switch block (not shown) including the open / close switch S1 in a mechanical structure and a switch block (not shown) by elastically supporting the switch block so that the open / A cable (that is, the power supply line 1) connected to the power supply PS and a cable (that is, the power supply line 1) connected to the traction machine TM And a housing (not shown) in which the coil L1 and a spring are housed, and the switch block is coupled to be capable of being drawn out and drawn.

The electromagnetic force of the coil L1 and the elastic force of the spring are very strong because the opening and closing of the power supply line 1 must be performed reliably for the sake of safety. Therefore, the switching block having the opening / closing switch S1 generates a large noise due to an impact caused by the electromagnetic force of the coil L1 or the elastic force of the spring when the switching block is pulled out from the housing.

The power supply unit V supplies driving power for driving to the coil L1 of the magnetic contactor MC.

The power supply unit V may use a battery to stably supply DC power as a driving power source, or may be a converter that converts commercial power to DC power.

The control switch SAR is provided on a power line connecting the power supply unit V and the coil L1 of the magnetic contactor MC so that the driving power of the power supply unit V is applied to the magnetic contactor MC .

The control switch (SAR) is controlled on and off by a controller (not shown) of the elevator.

As the control switch (SAR), a relay may be used, and in addition, an electronic device such as a transistor or a triac having a switching function may be used as the control switch (SAR).

The safety switches SW1, SW2 and SW3 are provided on a power supply line 3 connecting the power supply unit V and the coil L1 of the magnetic contactor MC to open and close the power supply line 3, A plurality of sensors are provided for interlocking with various sensors and detectors provided to prevent elevator safety accidents.

The coil L1 of the power supply unit V, the control switch SAR, the safety switches SW1, SW2 and SW3 and the magnetic contactor MC are connected in series via the power supply line 3, The driving power is not supplied to the coil L1 of the magnetic contactor MC if any one of the safety switches SW1, SW2 and SW3 is off. In other words, the magnetic contactor MC opens the power supply line 1 and the driving power of the power supply PS is not supplied to the traction machine TM because the safety condition of the car of the elevator is insufficient .

The on-noise reduction unit NTC is configured such that the control switch SAR is turned on so that the driving power of the power supply unit V is initially supplied to the coil L1 of the magnetic contactor MC, Thereby gradually increasing the noise generated by the magnetic contactor (MC). That is, the electromagnetic force generated in the coil L1 of the magnetic contactor MC is gradually increased so that the switch block is smoothly drawn out (or introduced) so that no noise is generated.

The on-noise reduction unit NTC is provided in a power supply line 3 connecting the power supply unit V and the coil L1 of the magnetic contactor MC. The NTC has a negative resistance Coefficient element can be used.

The NTC element has a property that its resistance value decreases when the temperature rises.

Therefore, the temperature of the NTC element gradually rises as the driving power is supplied, while the resistance value of the NTC element is large at the initial stage when the control switch (SAR) is turned on and the power supply unit (V) As a result, the resistance value of the NTC element becomes gradually smaller, and the driving power supplied to the coil L1 of the magnetic contactor MC gradually increases due to the output of the power supply V.

Since the electromagnetic force generated in the coil L1 of the magnetic contactor MC is proportional to the intensity of the driving power supplied thereto, the switch block having the opening / closing switch S1 in the magnetic contactor MC is increased in electromagnetic force (Or drive-in) to prevent (reduce) shock noise by gradually pulling (or pulling in) against the elastic force of the spring.

There may be a problem that the resistance value does not change or the overcurrent flows and is damaged because the NTC element is defective and the driving current begins to flow.

To solve this problem, as shown in FIG. 3, the relay (Ry) may be connected to the NTC element in parallel.

The relay Ry is turned on several seconds after the control switch SAR is turned on (for example, 2 seconds), so that the driving power output from the power supply unit V is transmitted through the relay Ry without passing through the NTC element Let it flow.

The relay Ry allows the driving power outputted from the power supply unit V to flow through the relay without flowing the NTC element after the control switch SAR is turned on so that the magnetic contactor MC is turned on, The resistance value does not increase after the control switch (SAR) is turned on because the NTC element is defective and the magnetic contactor MC is not supplied with sufficient driving power so that the magnetic contactor MC is turned on A sufficient amount of driving power is supplied to the magnetic contactor MC through the relay so that the magnetic contactor MC is turned on.

The off-noise reduction unit (D or R, C) is configured such that when the control switch (SAR) is turned off and the driving power of the power supply unit (V) is cut off, a back electromotive force And reduces the noise generated by the magnetic contactor (MC). That is, the electromagnetic force generated in the coil L1 of the magnetic contactor MC is gradually reduced so that the switch block is smoothly drawn (or drawn out) so that no noise is generated.

The off-noise reduction unit D or R, C is connected in parallel to the coil L1 of the magnetic contactor MC to form a closed circuit.

A counter electromotive force is generated in the coil L1 of the magnetic contactor MC when the driving power of the power supply unit supplied to the coil L1 of the magnetic contactor MC is cut off. ), A closed circuit is necessary. Thus, the off-noise reduction unit (D or R, C) is connected in parallel to the coil L1 to form a closed circuit.

The back electromotive force generated by cutting off the driving power of the power supply part V supplied to the coil L1 of the magnetic contactor MC gradually decreases and the electromagnetic force generated by the coil L1 gradually decreases The switch block (switch S1) of the magnetic contactor MC is smoothly drawn out (or drawn in) to reduce the generation of noise.

The off-noise reduction unit (D or R, C) comprises a diode D (see FIG. 1) or a capacitor and resistors R and C (see FIG. 2) So that the current corresponding to the power source does not flow to the off-noise reduction section (D or R, C).

Since the closed loop for the coil L1 of the magnetic contactor MC must be formed when the control switch SAR is turned off, the off-noise reduction unit D or R, L1 and the safety switches SW1, SW2 and SW3 are turned off when an emergency situation occurs, the magnetic contactor MC must immediately open the power supply line to prevent a safety accident, so that the off- It is preferable that the safety switches SW1, SW2 and SW3 are connected to the power line 3 between the terminals D and R or C and the coil L1.

Therefore, the on-noise reduction unit NTC and the off-noise reduction unit D or R, C are connected between the control switch SAR and the safety switches SW1, SW2, SW3, D or R, C) may be connected before or after the NTC as indicated by solid and dotted lines in FIGS.

While the present invention has been described in connection with the preferred embodiments thereof with reference to the accompanying drawings, it is to be understood that the present invention is not limited to the above embodiments, And should be construed as falling within the scope of protection of the invention.

PS; Power Supply TM: Traction Machine
MC: Magnetic contactor SAR: Control switch
V: Power supply part NTC: NTC element of on-noise reduction part
D: Diode of the off-noise reduction section C: Capacitor of the off-noise reduction section

Claims (4)

A magnetic contactor for opening / closing a power line for supplying driving power to a traction machine for moving up and down a car of an elevator;
A power supply for supplying driving power to the magnetic contactor;
A control switch for controlling supply of driving power to the power supply unit under the control of a controller of the elevator;
And an on-noise reduction unit for gradually increasing an initial driving power supplied by the power supply unit by turning on the control switch, the elevator safety circuit comprising:
Wherein the on-noise reduction unit is an NTC element provided on a power supply line for supplying driving power of the power supply unit to the magnetic contactor. The method according to claim 1,
And an off-noise reduction unit for reducing back-electromotive force generated by the magnetic contactor to gradually decrease when the control switch is turned off to cut off supply of driving power to the power supply unit. . 3. The method of claim 2,
Wherein the off-noise reduction unit comprises a diode, a capacitor, and a resistor for forming a closed loop through which a back electromotive force generated by being connected in parallel to the magnetic contactor flows. delete
KR1020150126045A 2015-09-07 2015-09-07 Safety circuit for elevator muting noise KR101754972B1 (en)

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KR1020150126045A KR101754972B1 (en) 2015-09-07 2015-09-07 Safety circuit for elevator muting noise

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Application Number Priority Date Filing Date Title
KR1020150126045A KR101754972B1 (en) 2015-09-07 2015-09-07 Safety circuit for elevator muting noise

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KR20170029123A KR20170029123A (en) 2017-03-15
KR101754972B1 true KR101754972B1 (en) 2017-07-06

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004159423A (en) * 2002-11-06 2004-06-03 Fujitec Co Ltd Controller of motor

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004159423A (en) * 2002-11-06 2004-06-03 Fujitec Co Ltd Controller of motor

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