CN212740555U

CN212740555U - Electric hoist control system adopting alternating current contactor

Info

Publication number: CN212740555U
Application number: CN202021515086.9U
Authority: CN
Inventors: 徐铁华
Original assignee: Nantong Baowo Hoisting Machinery Co ltd
Current assignee: Nantong Baowo Hoisting Machinery Co ltd
Priority date: 2020-07-28
Filing date: 2020-07-28
Publication date: 2021-03-19
Anticipated expiration: 2030-07-28

Abstract

The utility model provides an electric hoist control system adopting an alternating current contactor, a power supply provides a rectifier bridge I, a control button, a contactor KM1 coil wiring terminal and a contactor KM2 coil wiring terminal, the positive pole of the direct current output end of the rectifier bridge I is connected with a K3 normally open contact of a contactor KM1 and an M3 normally open contact of a contactor KM 2; the negative electrode of the direct-current output end of the rectifier bridge I is connected with a K4 normally closed contact of a contactor KM1 and an M4 normally closed contact of a contactor KM 2; the K3 normally open contact of the contactor KM1 and the M4 normally closed contact of the contactor KM2 are connected with the motor rotor, the other end of the motor rotor is connected with the input end of a rectifier bridge II, the M3 normally open contact of the contactor KM2 and the K4 normally closed contact of the contactor KM1 are connected with the other input end of the rectifier bridge II, and the output end of the rectifier bridge II is connected with the motor stator; the control button controls the power on and off of the coils of the alternating current contactor KM1 and the alternating current contactor KM2, so that the action of the main contact of each contactor is controlled, the on and off of two input ends of the rectifier bridge II are realized through the action of the main contact, and the running direction switching of the motor is realized.

Description

Electric hoist control system adopting alternating current contactor

Technical Field

The utility model relates to an electric hoist control system, especially adopt ac contactor's electric hoist control system, ac contactor is given to micro-gap switch's signal, controls the operation of electric hoist motor through ac contactor, improves micro-gap switch's life-span.

Background

The electric hoist is also called an electric hoist, is a special lifting equipment, is used for places such as industrial and mining enterprises, storage, wharfs and the like, is used for lifting, descending and translating and carrying heavy objects, and has the characteristics of small volume, light dead weight, simple operation, convenient use and the like.

The existing electric hoist adopts a microswitch, but the electric hoist has larger current and small current of the microswitch, and the microswitch is easy to damage.

SUMMERY OF THE UTILITY MODEL

The utility model provides an adopt ac contactor's electric hoist control system, realize the lift control of electric hoist, adopt following technical scheme: the method comprises the following steps: the direct current power supply comprises a power supply, a contactor KM1, a contactor KM2, a rectifier bridge I, a rectifier bridge II and a control button, wherein the power supply supplies power to the rectifier bridge I, the control button, a contactor KM1 coil wiring terminal and a contactor KM2 coil wiring terminal, and the positive electrode of the direct current output end of the rectifier bridge I is connected with a K3 normally open contact of the contactor KM1 and an M3 normally open contact of the contactor KM 2; the negative electrode of the direct-current output end of the rectifier bridge I is connected with a K4 normally closed contact of a contactor KM1 and an M4 normally closed contact of a contactor KM 2; the K3 normally open contact of the contactor KM1 and the M4 normally closed contact of the contactor KM2 are connected with the motor rotor, the other end of the motor rotor is connected with the input end of a rectifier bridge II, the M3 normally open contact of the contactor KM2 and the K4 normally closed contact of the contactor KM1 are connected with the other input end of the rectifier bridge II, and the output end of the rectifier bridge II is connected with the motor stator; an auxiliary contact N0 of the contactor KM1 is connected with a KM1 coil, and the other end of the KM1 coil is connected with an uplink control end of a control button; an auxiliary contact N0 of the contactor KM2 is connected with a KM2 coil, and the other end of the KM2 coil is connected with a control end of a control button downlink.

Preferably, the power supply is introduced through a 3-wire aviation socket.

Preferably, the control button adopts a 5-core aviation socket, wherein a pin 1 is connected to a negative electrode of a power supply, a pin 3 is connected to a positive electrode of the power supply, a pin 4 is an uplink control end, and a pin 5 is a downlink control end.

Preferably, KBPC5010 is adopted as the rectifier bridge I and the rectifier bridge II.

Preferably, the K1 normally open contact of the contactor KM1 is connected with a resistor R1, and the other end of the resistor R1 is connected with the M3 normally open contact of the contactor KM 2.

The utility model has the advantages that: in this patent application, the alternating current inserts alternating current contactor KM1 after I rectification step-down of rectifier bridge, alternating current contactor KM2, utilize control button control alternating current contactor KM1 in the operation process, getting of alternating current contactor KM2 coil loses the electricity, realize controlling the action of the main contact of each contactor, the break-make of two input ends of rectifier bridge II is realized again in the action of main contact, realize the switching of motor traffic direction, control button gives alternating current contactor with signal transmission, alternating current contactor electric current is big, long service life.

Drawings

Fig. 1 is a schematic circuit diagram of the present invention.

Detailed Description

The present invention will now be further described with reference to the accompanying drawings.

As shown in fig. 1, the method includes: the power supply supplies power to the rectifier bridge I, the control button, a contactor KM1 coil wiring terminal and a contactor KM2 coil wiring terminal; the rectifier bridge I rectifies and reduces the voltage of an introduced alternating current power supply and outputs the alternating current power supply as direct current voltage, and the positive pole B1 of the direct current output end is connected with the K3 normally-open contact of the contactor KM1 and the M3 normally-open contact of the contactor KM 2; the negative electrode B2 of the direct-current output end of the rectifier bridge I is connected with a K4 normally-closed contact of a contactor KM1 and an M4 normally-closed contact of a contactor KM 2; the K3 normally open contact of the contactor KM1, the M1 normally open contact of the contactor KM2 and the M4 normally closed contact of the contactor KM2 are connected with a pin 18 of a motor rotor, and the other end of the motor rotor is connected with the input end of a rectifier bridge II; the M3 normally open contact of the contactor KM2 and the K4 normally closed contact of the contactor KM1 are connected with the other input end of the rectifier bridge II, and the output end of the rectifier bridge II is connected with the motor stator; an auxiliary contact N0 of the contactor KM1 is connected with a KM1 coil to realize the self-locking function of the contactor KM1, and the other end of the KM1 coil is connected with an uplink control end of a control button; an auxiliary contact N0 of the contactor KM2 is connected with a KM2 coil to realize the self-locking function of the contactor KM2, and the other end of the KM2 coil is connected with a downlink control end of a control button.

Preferably, the power supply adopts 220V alternating current, and the power supply is led in through a 3-core aviation socket.

Preferably, the control button adopts a 5-core aviation socket, wherein a pin 1 is connected with the cathode of a power supply, a pin 3 is connected with the anode of the power supply, a pin 4 is an uplink control end, and a pin 5 is a downlink control end.

Preferably, the K1 normally open contact of the contactor KM1 is connected with a resistor R1, the other end of the resistor R1 is connected with the M3 normally open contact of the contactor KM2, and the resistor R1 plays a role in peak absorption so as to prevent faults and accidents.

In the application, after the 220V voltage is rectified and reduced in voltage through the rectifier bridge I, stable direct-current voltage is output, and the output end of the direct-current voltage is connected with main contacts of the contactor KM1 and the contactor KM 2; and the power on of the coil of the contactor KM1 or the contactor KM2 is selected by using a control button (or called a microswitch), such as: the pin 4 of the control button acts, after a coil of the contactor KM1 is electrified, normally open contacts K1, K2 and K3 are closed, a normally closed contact K4 is disconnected, self-locking is realized through an NO auxiliary contact (the same principle of the contactor KM 2), and one side of a motor rotor of a rectifier bridge II connected with a motor hoist is communicated after the K3 is closed, so that forward rotation (or reverse rotation) is realized for ascending; on the contrary, if the pin 5 of the control button acts, the coil of the contactor KM2 is electrified, the input end on the other side of the rectifier bridge II is electrified, and the motor rotates reversely (or rotates forwards) for descending.

Finally, it should be noted that: the above embodiments are only used for illustrating but not limiting the technical solutions of the present invention, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made thereto without departing from the spirit and scope of the invention, and the appended claims are intended to cover such modifications and equivalents as fall within the spirit and scope of the invention.

Claims

1. Adopt ac contactor's electric hoist control system, its characterized in that: the method comprises the following steps: the direct current power supply comprises a power supply, a contactor KM1, a contactor KM2, a rectifier bridge I, a rectifier bridge II and a control button, wherein the power supply supplies power to the rectifier bridge I, the control button, a contactor KM1 coil wiring terminal and a contactor KM2 coil wiring terminal, and the positive electrode of the direct current output end of the rectifier bridge I is connected with a K3 normally open contact of the contactor KM1 and an M3 normally open contact of the contactor KM 2; the negative electrode of the direct-current output end of the rectifier bridge I is connected with a K4 normally closed contact of a contactor KM1 and an M4 normally closed contact of a contactor KM 2; the K3 normally open contact of the contactor KM1 and the M4 normally closed contact of the contactor KM2 are connected with the motor rotor, the other end of the motor rotor is connected with the input end of a rectifier bridge II, the M3 normally open contact of the contactor KM2 and the K4 normally closed contact of the contactor KM1 are connected with the other input end of the rectifier bridge II, and the output end of the rectifier bridge II is connected with the motor stator; an auxiliary contact N0 of the contactor KM1 is connected with a KM1 coil, and the other end of the KM1 coil is connected with an uplink control end of a control button; an auxiliary contact N0 of the contactor KM2 is connected with a KM2 coil, and the other end of the KM2 coil is connected with a control end of a control button downlink.

2. The electric hoist control system using an ac contactor according to claim 1, wherein: the power supply is introduced through a 3-core aviation socket.

3. The electric hoist control system using an ac contactor according to claim 1, wherein: the control button adopts 5 core aviation sockets, and 1 pin inserts the power negative pole, and 3 pins insert the power positive pole, and 4 pins are ascending control end, and 5 pins are descending control end.

4. The electric hoist control system using an ac contactor according to claim 1, wherein: the rectifier bridge I and the rectifier bridge II adopt KBPC 5010.

5. The electric hoist control system using an ac contactor according to claim 1, wherein: the K1 normally open contact of the contactor KM1 is connected with a resistor R1, and the other end of the resistor R1 is connected with the M3 normally open contact of the contactor KM 2.