Soft start and compensation integrated device

Abstract

The invention discloses a soft start and compensation integrated device, which comprises a main body module, a quick response module, a flow compensation module and an angle change module, and the main body module is used for adjusting the resistance value of a liquid resistor during soft start, and the quick response module is used for quickly adjusting the main body module according to the current change during soft start; the main body module comprises a liquid storage outer box and a liquid storage inner box, the liquid storage inner box is arranged in the liquid storage outer box, the front side and the rear side of the liquid storage inner box are fixedly connected with the inner wall of the liquid storage outer box, a movable pole plate and a fixed pole plate are arranged in the liquid storage inner box, and sliding grooves are formed in the front side and the rear side of the inner wall of the liquid storage inner box; and magnet blocks are fixedly connected to the middle parts of the front and rear sides of the movable pole plate. Through the main body module and the quick response module, the movable pole plate can be rapidly moved, and the control precision is higher.

Description

technical field [0001] The invention relates to the technical field of motor control, in particular to a soft start compensation integrated device. Background technique [0002] When the AC motor is started directly at full voltage, the starting current will reach 4-7 times the rated current. When the capacity of the motor is relatively large, the starting current will cause a sharp drop in the grid voltage and affect the normal operation of other equipment on the same grid. In order to reduce the impact on other equipment, soft start is used. The starting current is generally 2-3 times the rated current, and the grid voltage fluctuation rate is generally within 10%. Realize the smooth start of the motor and mechanical load, reduce the impact of the starting current on the power grid, and protect the power grid and mechanical system. Soft start means soft start, and dynamic compensation refers to dynamic compensation of power factor. Soft start compensation refers to the dy...

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Problems solved by technology

[0003] However, at present, the distance between the plates in the liquid resistance soft start is adjusted by the servo motor, and the speed of the servo motor moving the plates through the transmission system is relatively slow, resulting in low control accuracy, and the electrolyte usually has a certain amount after each soft start. Temperature rise. If the temperature of the liquid resistance box cannot be lowered in time in the occasion of frequent starting, it will seriously affect the starting performance of the motor, and the temperature rise will accelerate the diffusion of the electrolyte. It is difficult for the servo motor to measure the current measured in real time. Precise control of the moving distance of the electrode plate is not conducive to smooth start of the motor. In addition, the metal electrode plate of the liquid resistance soft start is soaked in the electrolyte for a long time, and the surface will be corroded to a certain extent. Regular surface treatment is required, and maintenance is more troublesome.

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