Meet, the heart warm

Once again when the spring breeze over time of the lintel and heart is always with the footsteps of spring, roaming in the nature culturelle, breathe the fresh air, the brow and heart, just like is the awaken of spring is abundant, smell the scent of soil, the heart as if already was pale green, all things are lost in the spring tides occur, a little bit, a little bit, in imperceptible in, change the color of the season, at this time, my thoughts always with ink, in the spring tide of the ups and downs, sea through the window of time pavilion, through the cycle of the changes of the earth, drift in the depths of time. Stagnation in the season we met…

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High efficiency motor promotion

At present, many countries have attached great importance to energy-saving motor system. The United States, Europe, Canada, Australia and other countries and regions have established energy efficiency standards for motor. In 2008 October, the International Electrotechnical Commission ( IEC ) issued a IEC60034-30 " single speed, three-phase squirrel cage induction motor efficiency classification " standard, unified the motor efficiency standards around the world, will unify motor energy efficiency standards are divided into IE1, IE2, IE3, IE4 four grades. Among them, the standard IE1 efficiency, IE2 efficiency, IE3 for ultra high efficiency, IE4 is a h…

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Development of frequency conversion technology

How to use the existing technology to achieve the purpose of energy saving is the most effective, has been one of the national science and technology development direction, frequency conversion technology at this time will inevitably enter the country. Every corner of VVVF technology we have in-depth life, control method of variable frequency speed system including V/F, vector control ( VC ), direct torque control ( DTC ). The V/F control is mainly used in performance at low cost, less demanding applications; and vector control are introduced, then started to the application of frequency control system in high performance applications. In recent ye…

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