JPH05105352A - Elevator control device - Google Patents

Abstract

PURPOSE:To provide an elevator control device enabling a no-footing installation method without adding special device even in the case of not supplying three- phase AC power. CONSTITUTION:An elevator control device is provided with a first converter 3 for converting AC power supplied from a three-phase AC power supply 1 into DC power; a second converter 7 connected to the output end of the first converter 3 so as to convert DC power into AC power; a winding machine 11 connected to the output end of the second converter 7 so as to drive an elevator cage vertically; a control device 18 for mainly conducting the speed control of the winding machine 11; and a third converter 24 for converting AC power supplied from a single-phase AC power supply 22 into DC power and outputting this DC power to the second converter 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator control device, and more particularly to operation control during elevator installation.

[0002]

2. Description of the Related Art Conventionally, when installing an elevator, there is a method of operating a hoisting machine installed in an elevator to elevate and lower a car frame, and install a device in a hoistway without using a car frame as a work floor without scaffolding. (Hereafter referred to as a scaffold-less installation method). Therefore,
A conventional elevator control system configuration used in the scaffold-less installation method will be described with reference to FIG.

In FIG. 3, an elevator control system includes a commercial three-phase power source 1, an electromagnetic contactor 2, and a three-phase power source 1.
A first converter 3 for converting AC power supplied from the DC power supply to DC power, a smoothing capacitor 4 for smoothing the power supplied from the first converter 3, and a resistor 5 for consuming regenerative power, Insu Iated Gate Bipolar Tran for power regeneration
sistor (hereinafter referred to as IGBT) 6, a second converter 7 that converts the DC power supplied from the first converter 3 into AC power, and a current that detects the output current from the second converter 7. The hoisting machine 11 driven by the detectors 8, 9, 10 and the AC power supplied from the second converter 7 as a drive source, the main sheave 12, the deflecting sheave 13, and the car frame 14 of the elevator car.
, A counterweight 15, an electromagnetic brake 16, a speed command device 17 for generating a speed reference for an elevator, and a speed command device 17
A control device 18 for inputting signals such as a speed reference signal from the vehicle and detection current signals from the current detectors 8, 9 and 10 and a transformer 19 for transforming the power supply voltage from the three-phase power supply 1 And rectifiers 20 and 21 for rectifying the AC power output from the transformer 19 into DC power.
The DC power output from 20 is used as the power supply for the control device, and the DC power output from the rectifier 21 is used as the power supply for the electromagnetic brake 16.

Normally, during the installation method, a speed command is issued from the speed command device 17, and the elevator rated speed is 45 to 105 m / min for a general-purpose elevator, whereas the speed during the installation method is about 10 to 15 m / min. Has been done.

[0005]

In the elevator control system as described above, the scaffold-less installation method is very effective and the workability is extremely excellent. If the delay or the temporary power supply capacity was insufficient, we could not deal with it at all.

Therefore, in order to enable the installation method by using, for example, a small-capacity temporary power supply facility or a single-phase power supply, an auxiliary electric motor and its speed reducer are provided in place of the hoisting machine and coupled to the hoisting machine. There is also a method of separately providing a temporary control device that releases a brake and an operating position that gives a lift command,
There are many parts to add as a device, and in terms of control, a control device different from the main elevator control device is required.
There were difficulties in operability, reliability and safety.

Therefore, an object of the present invention is to provide an elevator control device that enables a scaffold-less installation method without adding a special device even when three-phase power is not supplied.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a first converter for converting AC power supplied from a three-phase AC power supply into DC power, and this first converter. Second, which is connected to the output terminal of DC and converts DC power to AC power
Converter, a hoisting machine that is connected to the output end of the second converter as a load to drive the elevator car up and down, a control device that mainly controls the speed of the hoisting machine, and a single-phase AC power supply. There is provided an elevator control device including a third converter that converts supplied AC power into DC power and outputs the DC power to the second converter.

[0009]

According to the present invention, the AC power supplied from the three-phase AC power source is converted into DC power by the first converter, and the DC power output from the first converter is converted by the second converter. The AC power is converted to AC power and supplied to the hoist as a power source to drive the hoist, and the control device controls the power conversion action of the second converter to control the speed of the hoist. When the power is not supplied from the three-phase AC power supply, the AC power supplied from the single-phase AC power supply is converted into DC power by the third converter, and this DC power is input to the input terminal of the second converter. Since the elevator is output and the elevator speed is controlled in the same manner as described above, the elevator can be operated by the single-phase AC power supply even when the three-phase AC power supply is not supplied.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a configuration of an elevator control device according to an embodiment of the present invention. In FIG. 1, the same components as those of the related art are designated by the same reference numerals and the description thereof will be omitted.

The elevator control device of the present invention has the same configuration as the conventional elevator control device (FIG. 3) but has a single phase of 100 V.
The power supply 22, the electromagnetic contactor 23, the third converter 24 for converting the AC power supplied from the power supply 22 into the DC power, the power supplied from the smoothing capacitor 25 and the power supply 22 as the power supply for the control device 18. Automatic voltage regulator for supply (hereinafter referred to as AVR)
26 and an AVR 27 that supplies the power supplied from the power source 22 as a power source for the electromagnetic brake.

In the elevator controller constructed as described above, the single-phase 100 V AC power supplied from the power source 22 is converted into DC power by the third converter 24 and the smoothing capacitor 25, and the elevator main circuit is operated. Is supplied to both ends of the smoothing capacitor 4 of the DC bus. The supplied DC power is input to the second converter 7 and converted into AC power. The AC power output from the second converter 7 is the AC power controlled by the control device 18 based on the speed reference from the speed command device 17, and the hoist 11 is based on this AC power.
Is controlled and the operation of the car frame 14 is controlled.

Further, as shown in FIG. 3, a power supply for the control device and a power supply for the electromagnetic brake are obtained from the output terminals of the converters of the system 3, and 28, 29
They may be supplied via the DC / DC converters.

When a single-phase 100 V power source is actually rectified, the DC voltage supplied to the second converter 7 becomes 90 V, and the voltage supplied when the elevator operates at a rated speed of 45 to 105 m / min ( When three-phase 200 V is used) Only a voltage equivalent to one-third of 270 V can be obtained, but if the speed during elevator installation travel is about 10 to 15 m / min, induction of the hoisting machine will be sufficient. A voltage higher than the voltage can be obtained.

With the above-mentioned structure, even if only a single-phase 100 V circuit is supplied, the installation method without scaffolding is possible without requiring a special additional device, and since the control device of the permanent installation can be used, safety and control can be achieved. The workability is excellent and the work efficiency can be improved.

[0016]

As described above, according to the present invention, it is possible to provide an elevator control device that enables a scaffold-less installation method without adding a special device even when three-phase power is not supplied.

[Brief description of drawings]

FIG. 1 is a diagram illustrating a configuration of an elevator control device that is an embodiment of the present invention.

FIG. 2 is a diagram illustrating a connection example of a DC / DC converter of an elevator control device that is an embodiment of the present invention.

FIG. 3 is a diagram showing a configuration of a conventional elevator control device.

[Explanation of symbols]

 1 ... 3-phase power supply 3 ... 1st converter 7 ... 2nd converter 11 ... Hoisting machine 18 ... Control device 22 ... Power supply 24 ... 3rd converter

Claims (1)

[Claims] 1. A first converter for converting AC power supplied from a three-phase AC power supply into DC power, and a second converter connected to an output end of the first converter for converting DC power into AC power.
Converter, a hoisting machine that is connected to the output end of the second converter as a load to drive the elevator car up and down, a control device that mainly controls the speed of the hoisting machine, and a single-phase AC power supply. An elevator control device comprising: a third converter that converts supplied AC power into DC power and outputs the DC power to the second converter.