JPS62140989A - Driving device for elevator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Application in Childcare Works] The present invention relates to a simple type elevator operating device, and in particular to a portable elevator operating device incorporating a variable voltage variable frequency control device for controlling the speed of an electric motor. This relates to elevators, driving electric currents, and motive control ζ1 devices.

[Conventional technology]

When removing an aged elevator, the steps outlined in Figure 2 are required, but the removal of equipment installed in the hoistway takes the most time as it requires setting up scaffolding in the hoistway. It is a necessary work. By the way, in recent years there has been a gradual increase in the removal and renovation work of aging single-novator elevators, but in the case of elevators in environments where construction is highly necessary for buildings with only one elevator installed,
Shortening the construction period is an extremely important condition.

Conventionally, elevator operating systems as shown in FIGS. 6, 4, and 5 have been proposed to meet such demands. This figure 3, figure 4, and figure 5 are Tokumon Sho 5.
6 is a circuit diagram, an explanatory diagram of the interior of the elevator hoistway, and a perspective view of the elevator operating device shown in Publication No. 9-108671, in which (1) is a knife switch for a three-phase AC 200V power supply; ) H upward direction detection relay, (211), (2a2), (2,14) are normally open contacts, (2a3)
ld normally closed contact, +81ij downward direction detection relay, (3
al), (3a2), (3a4) are normally open contacts,
(3a3) is a normally closed contact, (4) is an input terminal for low speed motor operation, (5Hd 100V knife switch for power supply, (
6) fl operation switch, (γ) is an indicator light, (8) V'i
Rectifier, (9) C push button switch, (101H buzzer, (1η is push button switch for ascending operation, (formerly Ha push button switch for descending operation, (1B + [ascent limit safety switch, (14) H descending limit safety switch , C5) is the other safety switch, C6) is the electromagnetic brake input terminal, (83) Vi transformer, and 1 Hose.
The figure is an explanatory diagram of the inside of the hoistway to show an overview of the removal work, and shows 117) i. The existing operation panel to be removed; (c) the elevator operating system of the present invention; C19) the machine room; Borope % fztll't Car guide rail, - counterweight guide rail, fm+i cable, (4)) counterweight, basket, (251 is the operation box. Fig. 5 is an overview of the device μs) In the figure, (2)) is a 6-phase AC 20
0v power supply, remote cord, μs) is the input terminal for the socket, Oka hub plug, tap), and 4) is the output terminal.

In other words, the knife switch (1) has a 3-phase or 200
After connecting to the V power supply, turn on the AC 100V power to the knife switch (6). Next, when the switch (6) is turned on, the indicator light (A) lights up. After that, depending on the operation box, if you press the push button switch (9) and the lift operation push button switch (9) on the car at the same time, a buzzer (11 m
sounds, the upward direction detection relay (2) is activated, and (2a1
), (2a2), and (2a4) enter, and as a result, they ascend to the elevator at low speed. If you press the push button switch (9) and the downward operation push button switch (□□□ at the same time, the buzzer αQ will be activated.
sounds, and the direction detection relay (81) does not operate.
), (3a2)*(3a4), the elevator descends at low speed.

At this time, normally closed contacts (2a3) + (3a3) act as a safety interlock. Thereby, equipment in the hoistway can be removed while operating the elevator, regardless of removal of the machine room control panel and the like.

As a result, the work of assembling and dismantling the scaffolding for work becomes unnecessary, making it possible to shorten the construction period.

[Problem that the invention seeks to solve]

Conventional elevator operating devices are mainly used to control the starting and rotational direction of the motor, so they are equipped with two-speed motors, etc., which have low-speed windings (high-speed and low-speed operation can be switched by changing the winding connections). The problem was that the system lacked versatility because the driving device was applied to a single-speed elevator (including electric motors) or electric motors with a low elevator rated speed to meet the low-speed operation requirements during work.

This invention was made to solve the above-mentioned problems, and the object is to obtain a highly versatile elevator operating device that can be applied to a single-speed electric motor with a high elevator rated speed. It is.

[Means for solving problems]

The elevator operating device according to the present invention has a power input terminal that draws power from an existing power line, and an electric 8! means for switching the phase rotation direction in accordance with the elevator operating direction, and a variable voltage for variable speed control of the rotational speed of the electric motor; Variable frequency (hereinafter vv
vF) and is configured to be portable.

[Effect]

The elevator operation device according to the present invention uses a VVVF control device to control the speed of the electric motor, so that even if the electric motor has a high elevator rated speed, the electric motor is operated at a low speed in accordance with the construction operation of the elevator equipment, and the scaffolding is moved at a low speed. In addition, a temporary power source is drawn into the input terminal from the existing power supply equipment and a control output is output to the motor from the output terminal, so it can be a portable operating device suitable for on-site work.

〔Example〕

A first embodiment of the elevator operating device of the present invention will be described below.
This will be explained based on the diagram. In the figure, the same symbols as in FIG. 3 indicate the same parts.

As a component of the rotation switching means (1A), s (2a
5).

(2a6) ii, normally open contact of the upward direction detection relay (2), (3a5), (3a6) the downward direction detection relay (8)
(4') is the input terminal of the hoisting motor, (4') is the travel relay, (41al), (41a2), (41a3)
), (41a4) is its normally open contact. And the 1/4 converter, (6)) is a smoothing capacitor, -μ inverter, (45a) and (45b) are signal level conversion circuits, the ring is a frequency command generation circuit, the number is an arithmetic circuit, and the number (2) is a pace drive circuit. Yes, and constitutes the vvvp' control device (4A).

Next, the operation of this embodiment will be explained based on the above configuration. First, when the push button switch (9) and the upward operation push button switch (6) are pressed simultaneously, the upward direction detection relay (2) is activated, and (2a5) and (2a6) are closed.

Therefore, the running relay (41a1) is energized, its normally open contacts (41al) to (41a4) are opened, and power is supplied to the main circuit and the electromagnetic brake.
5a), a signal is transmitted between the frequency command generation circuit (equipment) and the arithmetic circuit. When the calculation circuit is turned off, the phase rotation direction and frequency command of the inverter output are calculated and processed, and the base drive circuit drives the inverter and rotates the hoisting motor at a predetermined speed. Therefore, the elevator car ascends at a predetermined speed.

The case in the downward direction is also the same as above, and the operations of other parts are the same as in the conventional example.

In addition, in Fig. 1, the frequency setting device (50) indicated by a dashed line
You can further increase versatility by adding .

In addition, in this embodiment, open-loop control is used and the inverter drive method is not precise, so high operating performance cannot be achieved, but it is sufficient for construction use.
It is easy to configure, compact, and lightweight.

〔Effect of the invention〕

As described above, according to the present invention, a variable voltage and variable frequency control device is incorporated in a portable double-motor control device operated by power drawn from the existing power supply equipment, so that it can be used for driving elevators with high elevator rated speeds. This has the effect of providing a highly versatile elevator operating device that can control the electric motor at low speed with a simple configuration.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram showing the overall configuration of an embodiment of the present invention;
Figure 2 shows the method of elevator construction using the conventional elevator construction method and this implementation. Figure 6 is a circuit diagram showing the overall configuration of the conventional elevator operating system. Figure 4 shows the elevator FIG. 5 is a perspective view of the interior of the elevator going up and down using the operating device. In the figure, (1') is an input terminal, (IA) i; is a rotation switching means, (4A) μ variable voltage variable frequency control device, (
4') is the output terminal. In addition, the same reference numerals in each figure indicate the same or equivalent parts. 0 Figure 2 ÷ Homogeneous cleaning Figure 1 Figure 3 Figure 4 Figure 5 Procedural amendment (voluntary) Showa year month date 2゜Name of the invention: Elevator operating device 3, relationship with the amended person case Patent applicant address: 2-2-3 Marunouchi, Chiyoda-ku, Tokyo Name (601) Mitsubishi Electric Corporation Representative Moriya Shiki 4, Attorney Address 2-2-3-5 Marunouchi, Chiyoda-ku, Tokyo
, Detailed description of the invention in the specification to be amended. 6. Contents of the amendment (1) The statement “together with the electric motor” on page 6, line 17 of the specification is amended to read “together with the electric motor”. (2) The statement "moves at low speed" on page 6, line 18 of the specification is corrected to "moves at low speed."that's all

Claims (3)

[Claims] (1) An elevator drive electric motor that receives a temporary power source from the existing power supply equipment at the input terminal for power input, and connects the control output of the motor drive control circuit operated by the temporary power source to the output terminal of the control circuit. An elevator operating device for simply controlling an elevator for delivery to the elevator, comprising: rotation switching means for switching the phase rotation direction of the motor according to the operating direction of the elevator; and a variable voltage for controlling the speed of the motor based on variable voltage variable frequency control. What is claimed is: 1. An elevator operating device comprising: a variable frequency control device; and configured to be portable so that power supply equipment, a control motor, and a control circuit can be freely connected through the input terminal and output terminal. (2) The elevator operating device according to claim 1, wherein the output frequency of the variable voltage variable frequency control device can be lower than the input side frequency. (3) The elevator operating device according to claim 1 or 2, wherein the variable voltage variable frequency control device includes an output frequency setter and variably controls the output frequency.