MEDIUM VOLTAGE INDUSTRIAL VARIABLE （中压工业变量）.pdf

MEDIUM VOLTAGE INDUSTRIAL VARIABLE SPEED DRIVES Joable Andrade Alves, Gilberto da Cunha and Paulo Torri joable@weg.net , gilbertoc@weg.net and pjtorri@weg.net WEG AUTOMAÇÃO (Brazil) Av. Prefeito Waldemar Grubba, 3000 – 89256-900 – Jaraguá do Sul – SC - Brazil Abstract – This study presents different technologies A dynamic response at least equivalent to that of a DC and topologies of medium-voltage (MV) drives available motor can be achieved. It is widely known that induction on the market. The paper describes the advantages and motors are simpler in structure than other motors: they disadvantages of each configuration and the impact in the are more robust, more reliable and require little quality of energy in the mains and motor sides when maintenance. The induction motor is fed by a drive that using them is also analyzed. Technical requirements and provides an instantaneously controlled set of phase practical considerations for end users and system currents that form the stator space vector current which designers are identified for a proper selection in this field. consists of two components: the first is the magnetizing In addition, results of experimental tests are presented current which is controlled to have constant magnitude to using a Neutral Point Clamped High Voltage IGBTs maintain constant rotor flux linkage and the second is the (NPC-HV-IGBTs) on a Voltage Source Inverter (VSI) torque current which is instantane