Frekvenční měniče Katalogy, manuály (EN+CZ)

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Vydal: ABB s.r.o, ELSYNN Autor: ABB ELSYnn

Strana 714 z 825







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every ps) in the advanced motor software m odel the high-speed digital signal processor. This allows fast startup after safety interruptions.e. Low losses The inherently low total losses the IGCT require low cooling capacity and small cooling equipment. DTC ensures the absolute lowest losses by switching the power semiconductors only when necessary. Fuseless design The ACS 6000 medium voltage drive is designed operate safely without fuses, resulting less spare parts and better overall reliability. ABB uses high power semiconductor switching devices and topology that brings down the part count minimum. In DTC, stator flux D l Typical torque (T) response DTC drive, compared with flux vector control with open loop Pulse Width Modulation (PWM) and torque are used primary control variables. Encoderless Encoders are known cause failures due to their exposed position the motor. Control the drive is immediate and smooth under all conditions and the audible noise the motor is considerably reduced. 8 ACS 6000 Control The ACS drive control platform is based BB’s award-winning Direct Torque Control (DTC), resulting in the highest torque and speed performance as ell low est losses ever achieved in medium voltage drives. What Direct Torque Control? DTC revolutionary motor control method for drives that allows accurate control of both motor speed and torque without pulse encoder feedback from the motor shaft. BB’s ACS 6000 medium voltage drive can operate without encoder, thereby reducing maintenance costs and ensuring high levels availability. Fast response mains fluctuations and process side changes The exceptionally fast torque step response of the ACS 6000 means that can respond to process and mains changes extremely fast. The motor state calculations are updated 40,000 times second (i. Due to the continuous updating the motor state and the comparison the actual values to the reference values, every single switching in the inverter determ ined separately.Technology highlights Reliability has been the main guiding principle the research and development activities for ABB’s medium voltage drives. Part count The fewer the parts the higher the reliability. IGCT switching devices ABB has developed high power semiconductor called IGCT (Integrated ate Commutated Thyristor) allow the use modern control algorithm hich can elim inate harm onics, improve dynamic response time and maintain, or even control, the power factor. This enables easy handling power-loss situations and sudden load changes. ABB . This results a reliable, compact and service-friendly drive