An intelligent frequency conversion control system for an evaporative cooling ventilator

Abstract

The invention discloses an intelligent frequency conversion control system for an evaporative cooling ventilator. The system comprises an operation panel, a main board and a motor. The operation panel and the motor are both connected with the main board. The main board comprises a CPU control unit, a high-power integrated control module, a relay unit, a water level detection circuit, a second communication module, a motor current detection circuit and a power processing module. The high-power integrated control module, the relay unit, the water level detection circuit, the motor current detection circuit and the second communication module are connected with the CPU control unit. The high-power integrated control module is connected with the motor. A control algorithm of SVPWM superior to SPWM is adopted, harmonic components of output current of an inverter and harmonic losses of the motor can be reduced, the pulsating torque and noise are reduced, motor efficiency is improved, the power use rate is increased, and complex and diverse menu operation and parameter setting can be achieved.

Description

[0001] 【Technical field】 [0002] The invention relates to the technical field of evaporative cooling ventilators, in particular to the technical field of an intelligent frequency conversion control system for evaporative cooling ventilators. [0003] 【Background technique】 [0004] Existing evaporative cooling ventilator control systems are generally divided into single-speed models and speed-adjustable models, which are used in different occasions. The advantage of using speed regulation is that, first, to meet the actual needs, continuous high-speed operation may cause the temperature to be too low, which is unbearable. The second is that when the fan is running at low speed, it is more energy-saving and power-saving. The third is the noise requirement. When the user sleeps or needs to be quiet, it is necessary to reduce the fan speed to achieve it. [0005] Three-phase asynchronous motors are commonly used in evaporative cooling ventilators. The only mature and feasible m...

AI Technical Summary

Problems solved by technology

The disadvantages of its use are: the harmonic component of the inverter output current and the harmonic loss of the motor are large, which increases the pulsating torque and noise, the motor efficiency is low, and its power utilization rate is low

In the evaporative cooling ventilator control system used in the market, the panels used all use one LCD, most of which are segment code display screens. Realize complex and diverse menu-based operations and parameter settings, thus affecting the realization and expansion of its functions

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