Is DC motor energy saving or AC current?
AC motor energy saving using frequency converter
DC speed control, that is, the alternating current into DC, the use of thyristor conduction angle to adjust, you want to, ah, SCR no loss? Of course, there is no small. Now many places use frequency control, why? Energy saving chant. You should know, now the good air conditioning, frequency conversion technology, frequency conversion is the most energy-efficient, or else enterprises will not invest so much money, research inverter technology.
DC speed depends on the series resistance changes, the motor voltage to speed control purposes, the resistance to consume a lot of active powerThe frequency converter is changed to the AC motor frequency by the power electronic technology to achieve the purpose of speed regulationThe power consumption of the frequency converter is much smaller than that of the DC speed regulating resistorAC motor coil inductance, consumption of reactive power, do not consume active power, but the transmission of these reactive power on the line of the current in the line resistance to consumption of active energy, so to add local capacitor compensationDC motor is characterized by convenient speed regulation, easy to realize high-power motor speed regulationNow, inverters can reach several thousand kilowatts of power
