Inversor de frequência

Abstract

Frequency converters, also known as frequency inve rters are electronic devices designed to convert line voltage alternatin g sinusoidal voltage in the latter and finally converted in a voltage amplitude and frequency variables. They are used on ships in three-phase induction ele ctric motors to replace the systems of mechanical speed variation, such as pull eys and hydraulic drives, as well as the expensive DC motors by all asynchron ous motor and inverter, cheaper maintenance simpler and simpler replacement for existing market variety of options and profuse supply of components . The frequency converters also often also act as pr otection devices for various electrical network problems that can occur, such as imbalance between phases, overload, voltage drop... The frequ ency inverters of the latest generation not only control the spindle speed of el ectric motors three phase alternating current, but also control other paramet ers inherent to the electric motor, one of which is the control torque. The frequency converters have become indispensable control devices on board in various functions such as security, spe ed control of electronic pumps etc.