CN201193187Y

CN201193187Y - Electric control equipment for electric translational slab clamp

Info

Publication number: CN201193187Y
Application number: CNU2008200763120U
Authority: CN
Inventors: 刘大淮; 姚战峰; 张松林
Original assignee: Taiyuan Heavy Industry Co Ltd
Current assignee: Taiyuan Heavy Industry Co Ltd
Priority date: 2008-01-30
Filing date: 2008-01-30
Publication date: 2009-02-11
Anticipated expiration: 2018-01-30

Abstract

The An electric control device of an electric translation slab clamp relates to the special hangers on the elevating machinery. The disadvantages of the electric control device of the traditional electric translation slab clamp include high error rate, low efficiency and frequent adjustment and change of the magnetic particle clutch. The electric control device of an electric translation slab clamp consists of a drive motor, a brake and a torque output controller. The torque output controller is a frequency converter. The electric control device of an electric translation slab clamp has the advantages ofis characterized in small starting current and no impact on machinery. The magnetic particle clutch in a driving chain is cancelled. ; The the utility model directly controls the output torque of the motor. , thus the Work work reliability of the clamp is increased.

Description

A kind of electrical controller of electric translational type slab clamp

Technical field

The utility model belongs to the special hanger on the handling machinery, particularly a kind of electrical control gear of slab clamp.

Background technology

At present, the electrical control of Mitsubishi heavy industry, the designed electric translational type slab clamp of Taiyuan heavy industry is to add magnetic-powder clutch at motor in the mechanical drive train of chela, and motor adds the full voltage full voltage starting, full speed running, after chela was clamped slab, chela was out of service, motor this moment high speed revolution still, magnetic-powder clutch skids, provide actuating signal when the zero-speed switch detects when clamping slab, the motor outage is stopped the rotation, finish clamp and clamp action.This automatically controlled following shortcoming that exists: the motor full voltage starting, starting current is big, and machinery is had greater impact; The gripping power that outputs to chela in the messenger chain is to rely on the output torque of adjusting magnetic-powder clutch to obtain, because the influence that magnetic-powder clutch is subjected to the magnetic wearing and tearing and distributes, output torque easily changes, and influences the use of clamp, needs to adjust regularly, safeguard and even change; The adjustment of exciting current, the rectangular distribution of magnetic should not be grasped precision; Clamp caliper temperature height, magnetic-powder clutch damages easily, and magnetic-powder clutch is difficult in maintenance etc.

Summary of the invention

The purpose of this utility model is to overcome the shortcoming of prior art, provides that a kind of fault rate is low, efficient is high, exempts from the electrical controller of the electric translational type slab clamp of regular adjustment, replacing.

The purpose of this utility model is achieved through the following technical solutions:

A kind of electrical controller of electric translational type slab clamp comprises: drive motor, drg, moment o controller is characterized in that: described moment o controller is a kind of frequency converter.

Modern frequency converter not only can the accuracy control electrical motor rotating speed, output torque that also can the accuracy control electrical motor.Adopt Torque Control, when the moment of motor output greater than load moment, the motor full speed running, when the moment of motor output less than load moment, motor is in the stall state.But no matter motor is in running state still is the stall state, and stator current is in the safe range all the time.

Adopt the motor on the frequency converter moment output control clamp, can cancel magnetic-powder clutch fully.When electric motor starting, give a bigger moment, overcome the static friction resistance, when motor torque surpasses the static friction resistance, speed can reach command speed after the normal operation, adjusts the motor output torque, makes the gripping power appropriateness (excessive gripping power may cause block existing picture) of clamp to slab; Promptly impulsive force is less when motor rotation blockage, avoids physical shock to damage.Frequency converter detects motor rotation blockage and stops output immediately.The electric motor starting electric current is set moment and is limited, and can not produce the overload impact electric current, also is subjected to the restriction of given moment when motor rotation blockage, and electric current is kept smaller value.So just guarantee the safety of frequency converter and electrical motor, reduced deadline factor.

Utilize Frequency Converter Control, elements such as the magnetic-powder clutch in the alternative traditional solution, zero-speed switch are realized the smooth running that electric bar plate clamp opens and closes, the accuracy control of gripping power, operation steady in a long-term.

The utility model and background technology relatively have the following advantages:

Electric machine soft starting, starting current is less, and machinery is not impacted.Magnetic-powder clutch in the cancellation messenger chain, the output torque of direct control electrical motor, output is stablized constant, improves the reliability of clamp work.The adjusting accuracy height, and support is held easily.Frequency converter is contained in condition preferably in the electric panel room, and is not fragile.Frequency converter is safeguarded easier.

Description of drawings

Fig. 1 adopts conventional electric translational type slab clamp physical construction block diagram;

Fig. 2 is an electric translational type slab clamp physical construction block diagram of the present utility model;

Fig. 3 adopts conventional electric translational type slab clamp electrical control block diagram;

Fig. 4 is an electrical control block diagram of the present utility model;

Fig. 5 is an electrical schematic diagram of the present utility model.

Describing typical case of the present invention in detail below in conjunction with accompanying drawing implements.

The specific embodiment

Shown in Fig. 4,5, a kind of electrical controller of electric translational type slab clamp comprises: drive motor, drg, moment o controller, its moment o controller is a kind of frequency converter.

As shown in Figure 1, be to adopt conventional electric translational type slab clamp structured flowchart; In this block diagram, be equipped with magnetic-powder clutch and overspeed switch.

As shown in Figure 2, be electric translational type slab clamp structured flowchart of the present utility model, cancellation magnetic-powder clutch and overspeed switch in this block diagram.Magnetic-powder clutch is rapid wear and the parts that are difficult to adjustment.

As shown in Figure 3, be to adopt traditional electrical control block diagram, traditional clamp driving motor is a full voltage starting, and needs a cover complicated magnetic-powder clutch control and commutation system.

As shown in Figure 4, be electrical control block diagram of the present utility model, be with frequency converter Torque Control mode controlling and driving electrical motor.Control of cancellation magnetic-powder clutch and commutation system, the cancellation zero-speed detects.

Claims

1. the electrical controller of an electric translational type slab clamp, comprising: drive motor, drg, moment o controller is characterized in that: described moment o controller is a kind of frequency converter.