CN2311480Y

CN2311480Y - Lifting electromagnet controller

Info

Publication number: CN2311480Y
Application number: CN 97247324
Authority: CN
Inventors: 朱国梁
Original assignee: NANJING TENGFEI AUTOMATIZATION EQUIPMENT FACTORY
Current assignee: NANJING TENGFEI AUTOMATIZATION EQUIPMENT FACTORY
Priority date: 1997-09-23
Filing date: 1997-09-23
Publication date: 1999-03-24
Anticipated expiration: 2007-09-23

Abstract

The utility model discloses a lifting electromagnet controller which comprises a rectifying circuit, an excitation degaussing loop and a trigger control circuit, wherein the excitation degaussing loop is provided with a lifting electromagnet, a main thyristor, an auxiliary thyristor and a diode. One end of the lifting electromagnet coil is connected with an output terminal of the rectifying circuit, and the other end is connected with the anode of the main thyristor. The cathode of the main thyristor is connected with a zero pole, and the gate pole of the main thyristor is connected with a trigger control circuit. The utility model has the advantages of simple circuit, few elements, low cost, high safety, economy, practicability, small volume and light weight.

Description

The lifting electromagnet control setup

The utility model relates to a kind of control setup of hoisting crane, especially a kind of lifting electromagnet control setup.

The all bound contactless switch of existing lifting electromagnet control setup circuit component.For example 25 pages of " improving the discussion of hoisting DC electromagnet apparatus functional reliability " civilian disclosed controller circuitrys mainly are made up of transformation link, rectification link, just contrary excitation conversion links, electromagnet " Electrified Transmission " magazine 89 years 1 phases, just contrary excitation conversion links wherein is made of excitatory degaussing loop, ON-OFF control circuit in fact, adopts two DC contactor to control the excitatory and degaussing of electromagnet respectively.Because the contact of contactless switch often burns out, and all has bigger limitation in its working stability and service life, therefore adopt the reliability of the lifting electromagnet control setup of this control circuit, safety not ideal enough always, and volume is big, the cost height.The utility model patent " lifting electromagnet non-contact controlling device " that application number is 94232081.6, notification number is CN2212579Y has proposed a kind of by excitatory, degaussing loop and afterflow, discharge loop, the lifting electromagnet control setup that adopts two-phase half-wave mode to constitute.Though this device has solved the problem that contactor control exists to a certain extent, the circuit complexity, element is many, cost is high, and does not have short-circuit protection, so economical and practical inadequately.

The purpose of this utility model is: at above-mentioned the deficiencies in the prior art part, propose a kind of not only safe and reliable but also economical and practical lifting electromagnet control setup.

In order to achieve the above object, lifting electromagnet control setup of the present utility model comprises rectifying circuit (1), excitatory degaussing loop (2), trigger control circuit (FC), lifting electromagnet coil (YL) is contained in excitatory degaussing loop, main thyristor (VS1) is contained in excitatory degaussing loop, auxiliary triode thyristor (VS2), diode (V4), discharging resistance (R6), one end of lifting electromagnet coil links to each other with the mouth of rectifying circuit, the anode of another termination main thyristor, the negative electrode connecting to neutral of main thyristor, control circuit is sent out in its gate pole contact, the anode of auxiliary triode thyristor connects rectification circuit output end through resistance (R7), connect the anode of main thyristor simultaneously through electric capacity (C6), control circuit is sent out in the gate pole contact of auxiliary triode thyristor, its negative electrode connecting to neutral, the anode of diode (V4) connects the anode of main thyristor, its negative electrode connects the mouth of rectifying circuit through discharging resistance (R6), constitutes afterflow degaussing loop.

When trigger control circuit made the main thyristor conducting, the lifting electromagnet coil got electric, the excitatory suction of electromagnet; When trigger control circuit made the auxiliary triode thyristor conducting, main thyristor was turned off, and the lifting electromagnet coil is through the loop discharge of diode and discharging resistance formation, electromagnet degaussing blowing.

Lifting electromagnet control setup in the such scheme has replaced contactless switch with thyristor, and circuit is simple and direct, and element is less, and cost is lower, therefore have not only safe and reliable but also economical and practical advantage, and volume is little, in light weight.

Below in conjunction with accompanying drawing the technical solution of the utility model is described further.

Fig. 1 is the circuit diagram of an embodiment of the utility model.

Lifting electromagnet control setup among Fig. 1 mainly can be divided into rectifying circuit 1, excitatory degaussing loop 2, flip-flop circuit FC three big links.

The power supply of rectifying circuit link connects the three-phase be made up of resistance R i, capacitor C i, diode Vi (i=1-3) formula rectifying circuit in addition through fuse FU, earth leakage protective automatic switch QA, and the 380V alternating current is transformed into the 220V direct current (DC).

Excitatory degaussing loop main composition element has lifting electromagnet coil YL, main thyristor VS1, auxiliary triode thyristor VS2, diode V4 and discharging resistance R6.The end of lifting electromagnet coil YL links to each other with the mouth of rectifying circuit, the anode of another termination main thyristor VS1, and the negative electrode of main thyristor VS1 is held through (11) that sample resistance R5 connecting to neutral, gate pole meet binary pair FC, constitutes energizing loop; The anode of auxiliary triode thyristor VS2 connects rectification circuit output end through resistance R 7, connects the anode of main thyristor VS1 simultaneously through capacitor C 6, and the gate pole of auxiliary triode thyristor VS2 connects (13) end, the negative electrode connecting to neutral of binary pair FC, constitutes the breaking circuit of main thyristor VS1; The anode of diode V4 connects the anode of main thyristor VS1, and its negative electrode connects the mouth of rectifying circuit through resistance R 6, constitutes afterflow degaussing loop.

Flip-flop circuit FC is made up of 15 pin integrated circuit component L292 and peripheral circuit, its (12) termination zero, and+24V power supply connects 3 pin of integrated circuit component L292, and through divider resistance R10.R12 connects control switch SA's (5), (7) end, 6 pin of (6) termination integrated circuit component L292 of control switch SA respectively.

In addition, the negative electrode of main thyristor VS1 when accessing sample resistance R 5, through diode V5, and the RC parallel circuit formed of R9 and C9 connect 6 pin of integrated circuit component L292, constitute short-circuit protection circuit.

When (6) of control switch SA, when (7) termination is logical, binary pair FC makes main thyristor VS1 conducting, and lifting electromagnet coil YL gets electric, the excitatory suction of electromagnet; When (6) of control switch SA, when (5) termination is logical, binary pair FC makes auxiliary triode thyristor VS2 conducting, thereby turn-offs main thyristor VS1, and lifting electromagnet coil YL is through the discharge of degaussing loop, electromagnet degaussing blowing.

When lifting electromagnet coil YL etc. located to leak electricity, earth leakage circuit-breaker QA automatic trip was immediately cut off the electricity supply; When lifting electromagnet coil YL etc. located short circuit, sample resistance R5 to binary pair FC output short-circuit signal, made auxiliary triode thyristor VS2 conducting through short-circuit protection circuit, thereby turn-offed main thyristor VS1, in time cutting-off of short-circuit electric current.Therefore, the lifting electromagnet control setup of present embodiment can be guaranteed the safe handling of electromagnetism weight-lifting equipment, and stable performance, long service life.

Except that above embodiment, the utility model also has other embodiments.For example, when the lifting electromagnet among Fig. 1 was replaced by electromagnetic separator, control setup of the present utility model can be used for the similar control field outside the lifting electromagnet.

Claims

1. lifting electromagnet control setup, comprise rectifying circuit (1), excitatory degaussing loop (2), trigger control circuit (FC), lifting electromagnet coil (YL) is contained in described excitatory degaussing loop, it is characterized in that: main thyristor (VS1) is also contained in described excitatory degaussing loop, auxiliary triode thyristor (VS2), diode (V4), discharging resistance (R6), one end of described lifting electromagnet coil links to each other with the mouth of rectifying circuit, the anode of another termination main thyristor, the negative electrode connecting to neutral of main thyristor, control circuit is sent out in its gate pole contact, the anode of auxiliary triode thyristor connects rectification circuit output end through resistance (R7), connect the anode of main thyristor simultaneously through electric capacity (C6), control circuit is sent out in the gate pole contact of auxiliary triode thyristor, its negative electrode connecting to neutral, the anode of diode connects the anode of main thyristor, its negative electrode connects the mouth of rectifying circuit through discharging resistance (R6).

2. lifting electromagnet control setup according to claim 1 is characterized in that: described rectifying circuit is other formula rectifying circuit, and power supply connects described three-phase formula rectifying circuit in addition through earth leakage protective automatic switch (QA).

3. lifting electromagnet control setup according to claim 1 is characterized in that: described trigger control circuit is made up of 15 pin integrated circuit component L292 and peripheral circuit.

4. lifting electromagnet control setup according to claim 1; it is characterized in that: also contain short-circuit protection circuit; described short-circuit protection circuit is made up of sample resistance (R5), diode (V5), capacitance-resistance parallel connection (R9, C9) circuit; the negative electrode of described main thyristor (VS1) is through sample resistance (R5) connecting to neutral, simultaneously through diode (V5), and the RC parallel circuit contact send out a control circuit.