Application of pic16f874 microcontroller in poleless speed - adjusting of dc motor 874单片机在直流电机无级调速系统中的应用
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Electronic units are applied to this device and poleless power regulating method is employed to control heating units , therefore the water temperature near the gate is prevented from being affected by the temperature change of surroundings and ice - free temperature is maintained all the time 该装置利用电力电子元件，采用无极调功的形式控制加热元件，使闸门附近的水温不受环境温度变化的影响，始终保持在不冻的温度。
