KR200157844Y1 - Lifter - Google Patents

Abstract

The present invention relates to a control device of a permanent magnet hoisting machine, in particular, by setting the maximum value (10) of the output by the microcomputer 20, the pickup switch (2-1), the maximum adsorption switch (2-) of the switch box (2) 2) a step set value 11 selected by the detachable switch 2-3; A ramp signal generator 12 for adjusting the acceleration / deceleration output according to the characteristics of each magnet; A voltage adder (14) that adds the output value of the ramp signal generator (12) and the minimum set value (13) for setting the minimum output at startup; When it is sent to the gate trigger waveform generator 15 of the silicon controlled rectifier according to the result value of the voltage adder 14, the waveform generated by the trigger waveform generator 15 is changed into a waveform that can be turned on by the silicon controlled rectifier. A waveform transformer 16 for giving; As the silicon-controlled rectifier is turned on by the output of the waveform transformer 16, the current signal amplifier detects the current generated by the thyristor modules 22 and 23 in the current sensor and amplifies the voltage to a voltage corresponding to the input of the controller 6 ( 17); Control device of a permanent magnet hoisting machine, characterized in that it consists of a microcomputer 20 to perform magnetization and demagnetization by the signal of the time set value 18 to set the time to send the output and the output of the switch signal 19 It is about.

Description

Control device of permanent magnet hoist

The present invention relates to a control device of a permanent magnet hoisting machine, and more particularly, to a control device of a permanent magnet hoisting machine for controlling a permanent magnet hoisting machine using cranes for unloading steel slabs, hot coils, various round rods, and rebars. will be.

As shown in FIG. 1, a hoist using a permanent magnet (PERMANENTMAGNET) is an Alnico alloy magnet 28 that uses low carbon steel as an outer yoke 30 and an intermediate pole 29 and is exposed to both sides of a quad pole. .

As shown in FIG. 2, a samarium cobalt (Sm-Co) rare earth permanent magnet (26) is wound with a solenoid coil (25) at the lower end and N / S magnetic is momentarily applied when a constant power is applied thereto. The pole is changed to change the direction of the magnetic flux line (MAGNETIC FLUX) to adsorb and transport the package object, and after the work is completed, the direction of the magnetic force line (MAGNETIC FLUX) is changed again to remove the package.

This permanent magnet hoisting machine is lighter than the hoisting machine using electromagnets, which can reduce the crane manufacturing cost and consume little power.

As described above, the hoisting machine using a permanent magnet is a magnetic circuit of a hoisting machine using high performance alnico magnet (ALNICO) (ALNICO), rare earth magnet samarium cobalt magnet (Sm-Co), (Nd-Fe-B) neodymium iron boron magnet By constructing a large-capacity hoisting machine can be used for transporting large heavy goods in steel mills and the like.

Conventionally, there is no separate device that can control the hoist using the permanent magnet.

The object of the present invention is to provide a permanent magnet hoisting control device for controlling the permanent magnet hoist used for unloading work of steel slabs, hot coils, various round rods, rebars, etc. using a crane.

1 is a system configuration of a permanent magnet hoisting machine.

2 is a cross-sectional view showing a permanent magnet hoisting machine.

3 is a schematic view showing a crane installation equipped with a permanent magnet hoisting machine.

Figure 4 is a block diagram showing a control device of a permanent magnet hoist according to the present invention.

5 is a block diagram showing a controller of the permanent magnet hoist according to the present invention.

* Explanation of symbols for main parts of the drawings

1: permanent magnet hoisting machine 2: switch box

2-1: Pickup switch 2-2: Magnet switch

2-3: Magnetic switch 3: Safety switch

4: buzzer 5: lamp

6 controller 7 hoisting object

20: micom 25: solenoid coil

26: samarium cobalt 27: base scroll

28: Alnico 29: electrode

30: York

A step set value for setting a maximum value of the output to select the pickup switch, the maximum suction switch, and the detachable switch of the switch box by the microcomputer to achieve the above object; A ramp signal generator for adjusting the acceleration / deceleration output according to the characteristics of each magnet; A voltage adder that adds an output value of the ramp signal generator and a minimum set value for setting a minimum output at startup; A waveform transformer which, when sent to the gate trigger waveform generator of the silicon controlled rectifier according to the result of the voltage adder, converts the waveform generated by the trigger waveform generator into a waveform capable of turning on the silicon controlled rectifier; A current signal amplifier for amplifying a current generated from a thyristor module by a current sensor while a silicon controlled rectifier is turned on as an output of the waveform transformer and amplifying the current to a voltage corresponding to an input of a controller; Provided is a control device for a permanent magnet hoist, characterized in that it is composed of a microcomputer to perform magnetization and demagnetization by the signal of the time set value for setting the time to send the output and the output of the switch signal.

With reference to the drawings will be described the configuration and operation of the subject innovation.

4 is a block diagram showing a control device of a permanent magnet hoist according to the present invention, Figure 5 is a block diagram showing a controller of the permanent magnet hoist according to the present invention.

First, if you want to adsorb the steel (7) to the permanent magnet hoisting machine (1) by pressing the Pick Up switch (2-1) of the switch box (2) from the switch signal 19 of the input port of the microcomputer 20 ( INPUT PORT 1 receives the 'H' signal and the microcomputer 20 receives only 75% of the set value of the MAX REFERENCE 10 by the value of the TIME REFERENCE 18. To be provided).

When the PULL MAG SWITCH 2-2 is turned ON, the microcomputer 20 provides 100% of the set value of the MAX REFERENCE 10 to the ramp signal generator 12. do. The control angle α and β of the thyristor gate are configured by configuring a voltage adder 14 for adding the output of the RAMP GENERATOR 12 and the MINIMUM REFERENCE 13. It is configured to provide a signal for the angle to the TRIGGER waveform generator 15.

In addition, the control angle signal of the thyristor gate is sent from the gate waveform generator 15 to the PULSE TRANSFORMER 16 in accordance with the synchronization signal obtained from the transformerFORMER 24, and the waveform transformer 16 In accordance with the magnetizing signal from the microcomputer 20, the thyristor module (THYRISTO bridge module) 23 is operated to supply electric power so that the magnetic force (MAGNETIC FLUX) direction of the permanent magnet hoisting machine can pass through the steel. By changing the / S pole, a large amount of magnetic flux passes through the steel, causing the steel to magnetize (adsorption).

On the other hand, if you want to demagnetize the steel (7) to the permanent magnet hoisting machine (1), that is, the permanent magnet hoisting machine magnetizes the package to move to the destination, and then when the product is attached and detached (DEMAG SWITCH) (2-3) When ON, the microcomputer 20 receives the "H" signal from the switch signal 19 to the INPUT PROT 2, and the microcomputer 21 receives the maximum set value by the value of the time set value 19. 100% of the set value of 10) is provided to the RAMP GENERATOR 12.

A voltage adder 14 is configured to sum the output of the RAMP GENERATOR 12 and the set value of the minimum set value 13 to control angles α and β of the thyristor gate. Signal to the trigger waveform generator 15.

Then, the control angle signal of the thyristor gate is sent from the trigger waveform generator 15 to the waveform transformer 16 according to the synchronization signal obtained from the transformer 24, and from the waveform transformer 16, the degreasing signal from the MICRO CONTRPLLER 20. According to the operation of the reverse thyristor module (THYRISTORY MODULE) 23 to obtain the power waveform required for demagnetization, the magnetic flux passing through the steel by changing the direction of the magnetic force (MAGNETIC FLUX) of the permanent magnet hoisting machine (1) N / S pole The magnetic flux line (MAGNETIC FLUX) is composed to remove the adsorbed product.

The present invention not only increases the productivity of the work but also provides the effect of preventing safety accidents.

Claims (1)

Setting the maximum value (10) of the output and selecting the pickup switch (2-1), the maximum suction switch (2-2), and the detachable switch (2-3) of the switch box (2) by the microcomputer (20). A setpoint 11; A ramp signal generator 12 for adjusting the acceleration / deceleration output according to the characteristics of each magnet; A voltage adder (14) that adds the output value of the ramp signal generator (12) and the minimum set value (13) for setting the minimum output at startup; When it is sent to the gate trigger waveform generator 15 of the silicon controlled rectifier according to the result value of the voltage adder 14, the waveform generated by the trigger waveform generator 15 is changed into a waveform that can be turned on by the silicon controlled rectifier. A waveform transformer 16 for giving; As the silicon-controlled rectifier is turned on by the output of the waveform transformer 16, the current signal amplifier detects the current generated by the thyristor modules 22 and 23 in the current sensor and amplifies the voltage to a voltage corresponding to the input of the controller 6 ( 17); Control device of a permanent magnet hoisting machine, characterized in that it consists of a microcomputer 20 to perform magnetization and demagnetization by the signal of the time set value 18 to set the time to send the output and the output of the switch signal 19 .