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Multi-motor starting control method, system and equipment

A technology for motor starting and starting control, which is applied in the control system, motor starter, motor generator control and other directions to prevent energy consumption and impact on electrodes, prolong maintenance period and reduce overall cost.

Pending Publication Date: 2022-01-11
ATLAS COPCO NANJING CONSTR & MINING EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problem in the prior art that when operating a rock drilling jumbo, it is necessary to start multiple motors according to a fixed sequence and time-sharing, or to start multiple motors sequentially after a fixed time interval based on human subjective, the present invention provides a multi-motor start control method, system and The mining equipment using this system can realize that when the start buttons of multiple motors are activated in no order, the controller outputs the motor start control signals in sequence according to the order in which the start buttons of each motor are activated, and between the start control signals of each motor Automatically add a certain delay to achieve staggered peak start

Method used

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  • Multi-motor starting control method, system and equipment

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Embodiment 1

[0037]At present, the motor starting of double-arm or multi-arm rock drilling rigs mainly relies on the operator to subjectively interval the activation time of each motor start switch to avoid simultaneous starting of multiple motors, thereby avoiding various adverse effects caused thereby. This starting method is generally divided into two ways: manual starting separately and time-sharing sequential starting. Above-mentioned two kinds of start-up modes all have deficiencies. First of all, the manual starting method depends entirely on the operation of the operator. Once the operator accidentally presses the start buttons of multiple motors at the same time, it will cause multiple motors to start at the same time. Secondly, the time-sharing and sequential start-up method requires that the motors that start later can only start after receiving the signal that the previous start-up motor has started, or start up in sequence with a delay. In this case, if the control circuit of ...

Embodiment 2

[0057] This embodiment takes three motors as an example, such as Figure 5 As shown, the control circuit of this embodiment is correspondingly expanded on the basis of the dual-motor control circuit, and a motor and a motor start-up control circuit are added. It should also be noted that the present invention is not limited to three motors, and can also be extended to the application of more than three motors. Moreover, the present embodiment adopts the star-delta step-down starting method for starting each motor, but the present invention is not limited to this starting method. In the actual starting application of the main motor of the rock drilling rig, the starting method of a single motor includes direct starting. Buck start and soft start etc.

[0058] Such as Image 6 with Figure 7Shown is the specific circuit schematic diagram of this embodiment. The 380VAC three-phase alternating current from the power grid is input to the input port of the transformer T16 throug...

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Abstract

The invention discloses a multi-motor starting control method, system and equipment, and belongs to the technical field of mining equipment control. Aiming at solving the problem that a plurality of motors must be started in a time-sharing manner according to a fixed sequence or the plurality of motors must be started in sequence after fixed time is manually and subjectively spaced when the mining equipment such as a drill jumbo is operated in the prior art, the invention provides a multi-motor starting control method, a multi-motor starting control system and mining equipment applying the system; the system comprises a signal generation unit, a controller, a motor starting control unit and a power distribution unit. Meanwhile, the invention discloses a control method based on the system. When starting buttons of a plurality of motors are activated in a non-sequential mode, a controller outputs motor starting control signals in sequence according to the sequence that the starting buttons of the motors are activated, certain time delay is automatically increased among the starting control signals of the motors, and peak shifting starting is achieved. The service cycle is integrally prolonged, the maintenance cycle is prolonged, and the overall cost is greatly reduced.

Description

technical field [0001] The present invention relates to the technical field of mine equipment control, and more specifically relates to a multi-motor startup control method, system and equipment. Background technique [0002] Drilling jumbo (also known as drilling jumbo) is a kind of rock drilling equipment used in tunnel and underground engineering construction by drilling and blasting method. It can move and support multiple rock drills to perform drilling operations at the same time. According to the number of rock drills erected, it can be divided into single-arm, double-arm and multi-arm drilling rigs (several arm rock drills correspond to several main motors). The power of the main motor of the rock drilling rig is relatively large. When a single motor is started, the starting current is generally more than four times its rated current. When multiple motors are started at the same time, the trunk current will be larger. The current is easy to cause impact on the driv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P1/58H02P1/04H02P1/02
CPCH02P1/58H02P1/04H02P1/026
Inventor 顾松林
Owner ATLAS COPCO NANJING CONSTR & MINING EQUIP