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Startmodus vum Starter
Startmodus vun dräi Phas asynchronous Motor
1, direkt Start. However, when the three-phase asynchronous motor starts directly, the current can reach 6-7 times the rated current, which has a large impact on the power grid, especially the high-power motor.
2, reduzéiert Spannung. De Buck fänkt haaptsächlech eng waarm Autorot Buck Start a Star Dräieck Buck Start.
Hot autobuck starting means that the motor voltage is reduced and the starting current is reduced at the same time when the autotransformer is started. Et gëtt allgemeng op ongeféier 55% -75% vun der raséiert Volet. De Virdeel ass datt d'Startspannung ganz einfach geännert ka ginn andeems d'Zuel vun den Taps vum Autotanonomer ännert. Den Nodeel ass de Besoin d'Noutwendegkeet ze benotzen, d'Käschte méi grouss ze benotzen.
Star triangle step-down starting refers to a method of changing the starting voltage by changing the connection mode of the motor, so as to reduce the starting current, which can only be applied to the normal connection mode of the triangle connection of the motor. When starting, the relay method is used to make the motor wiring mode star-shaped, at this time, the voltage of each phase of the motor is reduced to one-third of the original root sign, the motor speed reaches about 80% of the rated speed, and the control relay changes the motor wiring mode to triangle, and the motor starts to operate normally. De Virdeel soll datt et d'Autotionen zöéckelt kann, gëtt d'Käschte reduzéiert an d'Werforhmet fir Method fäerdeg an d'Zouverlabilitéit ass einfach an d'Zefriddenheet méi grouss. Den Nofantatioun ass datt de Verhältnis vun de Startrot ka geännert ginn, an de Motor konnt an der Stäre verëffentlechen ginn.
3, Frequenz resistor Start. Frequency sensitive resistance starting means that the frequency sensitive resistance is connected in series in the main circuit when the motor is started, thereby reducing the starting current. Frequenz sensibel Resistent kann d'Start aktuell glat änneren an manner Impakt op d'Stroumbrëff, sou datt et en öffentlechen Erklärungsmodus ass. However, high-power frequency-sensitive resistors are in the form of inductors, so they will produce a large electromagnetic eddy current in use, which will reduce the power factor of the grid.