High-torque full intelligent soft starter

Abstract

The invention discloses a high-torque full intelligent soft starter, and belongs to the technical field of manufacture of starters. For solving the technical problems, the invention provides the soft starter which is safe and reliable, has self-testing load and carries out instantaneous increasing start after a motor is started according to the load condition. The invention adopts the main technical scheme that when a control program flow of a main CPU receives a running command, the soft starter outputs a starting torque and then realizes a starting process according to a torque slope. The torque control realizes current closed-loop control through current feedback; aiming at different heavy and light loads, the soft starter outputs different torques to successfully start the loads of different types; and the soft starter has broad application prospect, not only can be applied to equipment which needs slow start such as scraper conveyors, blowers, water pumps and the like under mines, but also can be applied to severe environments such as coal dressing yards, metallurgy, harbors and wharfs, chemical plants and the like, and realizes speed adjusting start and control of an alternating current machine.

Description

technical field [0001] The invention relates to starter manufacturing technology, in particular to a manufacturing method of a high-torque fully intelligent soft starter with self-testing load and instantaneous continuous increase. Background technique [0002] The soft starter is used to start the three-phase AC asynchronous motor. It mainly adjusts the power supply voltage of the motor through the central processing unit and the thyristor to improve the starting and braking process of the induction motor, so that the motor starts and brakes smoothly and reduces the motor's load. The impact of starting on the power grid, while reducing the damage to the mechanical and electrical equipment during the starting process, but a bypass device needs to be added. The starting process of the soft starter is completed by the thyristor, and then switched to the bypass contactor to maintain operation , instead of relying on the thyristor to maintain operation, adding a bypass contactor...

AI Technical Summary

Problems solved by technology

[0004] First of all, the parameter setting is cumbersome, there are many starting modes, and different parameters need to be set according to different loads

This makes it very difficult for users to use. In many applications, it is difficult to start successfully.

Some need to go to the site by the technicians of the manufacturer to adjust different starting modes, starting rise time, starting voltage, etc. to start the load, and some can't start successfully at all, which brings troubles to the direct users and is very inconvenient to debug.

[0005] Secondly, there is only one set of soft starter parameters in the past, and it can only adapt to motors with the same motor parameters.

There are many customers who need one-to-two control, and the parameters of the two motors are different, so the soft starter can only configure parameters for one motor, but cannot guarantee the starting effect and protection of the other motor

[0006] In addition, the diversification of parameter codes makes it impossible to directly identify its functions

Different soft starter manufacturers have different function codes. Users must hold the user manual in one hand and set it in the other hand. The parameter setting is very cumbersome.

If the user manual is not with you or lost, you will be helpless to view and modify parameters

There are few or no operating parameters, the user does not know the running state of the motor, cannot display and view certain motor status data, lacks fault memory, and when the soft starter suddenly stops tripping or is reset by others, the user cannot directly know the reason It leads to faults, and it takes users a lot of time to find the cause of the fault. Many soft-start manufacturers cannot lock the parameters, so it is impossible to ensure that others can modify the parameters, and the result may cause equipment and personnel injuries.

Images