Simple integration. Direct connection to the mains and motor is achieved by ElectroDrives ED27 VFD structure itself with an input multi-winding phase-shifting transformer and series connection of power cells from the motor supply.
Due to the high voltage operation, the MV VFD keeps the input and output currents very low, therefore a much smaller cable section is required.
Versatile operation of any motor. ElectroDrives ED27 operates squirrel cage induction motors, synchronous motors as well as permanent magnet motors. Due to the low overvoltage obtained with our unique technology, ElectroDrives ED27 is capable to operate with existing old motors with standard insulation, as well as with the new motors designed for VFD applications, with reinforced insulation. All this is obtained without any additional output filters.
The multilevel pulse width modulation (PWM) provides a pure sine waveform in the output current, with a very low harmonics distortion current (THDi ≤ 2%) and voltage (THDu ≤ 5%).
Multi-cell topology and power quality. ElectroDrives ED27 topology with a multiple-winding phase-shifting transformer, with a multi-pulse rectifier (18-pulse up to 54-pulse rectifier), reduces the harmonics content dramatically and increases the power factor at the input, making unnecessary any additional filter or capacitor bank in the plant. Additionally, the multi-cell technology simplifies the construction of the drive making maintenance extremely easy.