High-frequency vibration motor frequency conversion speed regulation system

Abstract

The utility model relates to a frequency conversion speed regulation system of a high-frequency vibration motor, which relates to construction tools. The motor in the current system cannot be soft-started and when it is stopped, it cannot be forbidden to close the branch control cabinet when the inverter is working, and the inverter is vulnerable and the AC contactor is easy to arc, which will increase the system maintenance cost. At the same time, hidden dangers are increased, and there are complicated interlocking circuits, which is not conducive to maintenance. The control circuit of the present invention includes a detection circuit and a protection circuit. The detection circuit is provided with a signal detection terminal, which is connected to a signal output terminal of the frequency converter. The detection circuit includes a relay, and the relay coil is connected in series in the detection circuit. The normally open contacts and normally closed contacts are set in the protection circuit. It achieves the purpose of protecting the frequency converter and the AC contactor, prevents the arcing phenomenon of the AC contactor, improves the production safety while prolonging the product life, and has a simple interlock circuit and convenient maintenance.

Description

【Technical field】 [0001] The invention relates to construction tools, in particular to a frequency conversion speed regulation system of a high-frequency vibration motor, which belongs to the field of manufacturing railway track infrastructure equipment. 【Background technique】 [0002] High-frequency vibration motor frequency converter speed control system is mainly used in the construction of concrete prefabricated components of high-speed railways, expressways, highway bridges, and engineering buildings. A set of high-frequency vibration motor frequency converter speed regulation system includes a frequency converter, a plurality of parallel branch circuit control cabinets connected to the frequency converter, and multiple parallel connection motors connected to the branch circuit control cabinet. Each branch circuit control cabinet controls all the motors on a concrete precast mold to run or stop at the same time, and each concrete precast mold has 8 to 9 motors. In orde...

AI Technical Summary

Problems solved by technology

In order to prolong the service life of the components when the system is working, it is required to do the following: 1. The motor adopts soft start to protect the motor and the frequency converter, first start the branch control cabinet, and then start the frequency converter; 2. When stopping, first turn off the frequency converter Output and then close the branch control cabinet to prevent arcing between the contacts of the AC contactor; 3. The branch control cabinet is interlocked during operation, that is, only one branch control cabinet is allowed in a branch control cabinet connected to an inverter When the control cabinet is powered on, other branch control cabinets must be powered off. If the user starts two branch control cabinets at the same time, especially the second branch control cabinet, it will easily cause damage to the inverter.

The current system cannot meet the requirements of the first and second points, resulting in the inverter being easily damaged, and the phenomenon of arcing of the AC contactor, which increases the maintenance cost of the system and reduces the service life of the system

For the third requirement, the AC contactor and the auxiliary contact of the AC contactor are often interlocked at present, or the start / stop buttons of other branch circuit control cabinets are connected in series to the start / stop button of the branch circuit control cabinet. The wiring is very complicated, which brings trouble to the wiring, and is prone to failure, which is not easy to repair

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