Step-down starting electric dragging device

Abstract

The utility model relates to a step-down starting electric dragging device, and belongs to the technical field of crane installation and maintenance equipment. According to the technical scheme, a linkage table (3) is connected with the operation end of a step-down starting device (2), a translation mechanism resistance box (1) is connected with the load end of the step-down starting device (2), the step-down starting device (2) comprises a driving module (21), a thyristor set (22) and a display module (23), and the thyristor set (22) and the display module (23) are respectively connected with the driving module (21). The beneficial effects of the utility model are that: by adopting the simplified electrical control of circuit breaker-device-motor, the electrical equipment is stable, the service life of electrical elements is prolonged, the stable operation of the equipment is ensured, the repair time is reduced, and the protection function of the crane motor is increased.

Description

Technical Field

[0001] This utility model relates to a reduced-voltage starting electric drive device, belonging to the technical field of crane installation and maintenance equipment. Background Technology

[0002] Motor starting and electric drive are the most basic functional units enabling the operation of the crane's large traversing and hoisting mechanisms. During daily operation of the crane, motor starting and running often occur because the motor load is directly controlled by the linkage table contacts without an electrical control panel. This results in unstable operation, impacts the electrical system, causes operational instability, excessive current surges that burn out the motor, and ultimately, malfunctions and shutdowns. Summary of the Invention

[0003] The purpose of this utility model is to provide a reduced-voltage starting electric drive device. By adopting a simplified electrical control system of circuit breaker-device-motor, the electrical equipment is stable, the service life of electrical components is extended, the stable operation of the equipment is ensured, the emergency repair time is reduced, the protection function of the crane motor is increased, and the above-mentioned problems existing in the background technology are solved.

[0004] The technical solution of this utility model is: a reduced-voltage starting electric drive device, comprising a translation mechanism resistor box, a reduced-voltage starting device and a linkage platform, wherein the linkage platform is connected to the operating end of the reduced-voltage starting device, the translation mechanism resistor box is connected to the load end of the reduced-voltage starting device, and the reduced-voltage starting device comprises a drive module, a thyristor group and a display module, wherein the thyristor group and the display module are respectively connected to the drive module.

[0005] The thyristor group comprises five thyristors, which are connected in antiparallel and then in series in the stator circuit of the translation mechanism motor.

[0006] The linkage platform has four gears and five operating lines connected to the operating terminals of the step-down starting device.

[0007] The six resistance wires of the translation mechanism resistor box are connected to the wiring screws at the load end of the step-down starting device.

[0008] The display module includes an ammeter and a voltmeter.

[0009] The beneficial effects of this utility model are: by adopting a simplified electrical control system of circuit breaker-device-motor, the electrical equipment is stable, the service life of electrical components is extended, the equipment operation is stable, the emergency repair time is reduced, and the protection function of the crane motor is increased. Attached Figure Description

[0010] Figure 1 This is the electrical schematic diagram of this utility model;

[0011] Figure 2 This is a schematic diagram of the structure of the voltage reduction starting device of this utility model;

[0012] In the diagram: translation mechanism resistor box 1, asynchronous motor rotor 11, reduced voltage starting device 2, drive module 21, thyristor group 22, display module 23, intermediate relay 24, input control 25, auxiliary output 26, linkage table 3, 220V power supply 4. Detailed Implementation

[0013] To make the purpose, technical solution, and advantages of this utility model clearer, the technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described implementation cases are only a small part of this utility model, not all of them. All other implementation cases obtained by those skilled in the art based on the implementation cases of this utility model without creative effort are within the protection scope of this utility model.

[0014] A step-down starting electric drive device includes a translation mechanism resistor box 1, a step-down starting device 2, and a linkage platform 3. The linkage platform 3 is connected to the operating end of the step-down starting device 2, and the translation mechanism resistor box 1 is connected to the load end of the step-down starting device 2. The step-down starting device 2 includes a drive module 21, a thyristor group 22, and a display module 23. The thyristor group 22 and the display module 23 are respectively connected to the drive module 21.

[0015] The thyristor group 22 contains five thyristors, which are connected in antiparallel and then in series in the stator circuit of the translation mechanism motor.

[0016] The linkage platform 3 has four gears and five operating lines connected to the operating terminals of the step-down starting device 2.

[0017] The six resistance wires of the translation mechanism resistor box 1 are connected to the load end wiring screw of the step-down starting device.

[0018] The display module 23 includes an ammeter and a voltmeter.

[0019] In practical applications, when the main circuit is powered on, the drive module is also powered on, and the voltmeter displays the main circuit voltage value. At this time, the thyristor is cut off, disconnecting the main circuit. The auxiliary contacts, synchronized with the thyristor's switching on and off, close, while the normally open contacts open. When the control voltage is input, the ammeter displays the circuit current value, the thyristor conducts, the main circuit closes, the auxiliary normally open contacts close, and the main contacts open. When the control input voltage is removed, the circuit returns to its operating state.

[0020] The linkage console 3 has four gears and five operating lines connected to the operating terminals of the step-down starting device 2. Note the power connection method. The six resistance lines of the translation mechanism resistor box 1 are connected to the load terminal wiring screw of the step-down starting device 2. The controller of the linkage console 3 sends instructions to the inside of the step-down starting device 2, and controls the step-down starting of the translation mechanism resistor box 1 through the on / off control of its thyristor, so as to realize the accelerated operation of the translation mechanism.

[0021] The reduced-voltage starting device 2 uses five thyristors connected in anti-parallel and then in series in the stator circuit of the translation mechanism motor. By using the electronic switching function of the thyristors, the star or delta configuration of the thyristors is controlled by controlling the change of their conduction, thereby changing the magnitude of the motor input voltage, so as to achieve the effect of reduced-voltage starting of the motor and smooth operation of the motor when connected to the power grid.

[0022] This invention features strong anti-interference capabilities and a long lifespan, making it particularly suitable for electrical control systems operating in harsh environments with frequent operations. The product includes a fault code display, enabling rapid on-site fault diagnosis, and the display shows the fault codes. It achieves simplified electrical control of the circuit breaker, device, and motor. Electrical equipment is stable, the lifespan of electrical components is extended, and material consumption is reduced by 38,262 yuan annually. It ensures stable equipment operation, reduces emergency repair time, and guarantees production and outsourcing time.

Claims

1. A reduced-voltage starting electric drive device, characterized in that: It includes a translation mechanism resistor box (1), a step-down starting device (2) and a linkage table (3). The linkage table (3) is connected to the operating end of the step-down starting device (2). The translation mechanism resistor box (1) is connected to the load end of the step-down starting device (2). The step-down starting device (2) includes a drive module (21), a thyristor group (22) and a display module (23). The thyristor group (22) and the display module (23) are respectively connected to the drive module (21).

2. The reduced-voltage starting electric drive device according to claim 1, characterized in that: The thyristor group (22) contains five thyristors, which are connected in antiparallel and then in series in the stator circuit of the translation mechanism motor.

3. The reduced-voltage starting electric drive device according to claim 1, characterized in that: The linkage table (3) has four gears and five operating lines connected to the operating terminals of the step-down starting device (2).

4. The reduced-voltage starting electric drive device according to claim 1, characterized in that: The six resistance wires of the translation mechanism resistor box (1) are connected to the load end wiring screw of the step-down starting device.

5. The reduced-voltage starting electric drive device according to claim 1, characterized in that: The display module (23) includes an ammeter and a voltmeter.

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