The resistor series

Frequency sensitive resistors

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Description: Frequency sensitive rheostat is folded into the core of cast iron sheet or plate, and then put out of the reactor phase windings, the rotor winding is connected to the circuit, the winding and the core loss of electrical resistance determined by the imped

Frequency sensitive rheostat is folded into the core of cast iron sheet or plate, and then put out of the reactor phase windings, the rotor winding is connected to the circuit, the winding and the core loss of electrical resistance determined by the impedance of the rotor current the frequency change.
        Frequency sensitive rheostat for three-phase AC 50 Hz, winding capacity of 40-1000 kW motor, connected to the motor rotor circuit, as occasionally from the action.
Advantages are: the structure is relatively simple, low cost, easy maintenance, smooth start.
     Disadvantages are: inductance exists, cosΦ low starting torque is not great, suitable for light load motor start winding.
      Frequency sensitive rheostat of light load and heavy start of two types; including light load type is used for air compressors, refrigeration machines, machine tools, exhaust fan, etc., and heavy-starter for the ball mill, crusher, belt conveyor, etc. .
   Frequency sensitive rheostat is a great loss of reactor core shape with three columns and three windings, three windings connected in star, and through the slip ring and brush motors with wound rotor three-phase winding phase .
       Its core column uses thick steel pipe, thick steel yoke used as a skeleton composed of magnetic and eddy currents induced in the body, the outer tube is equipped with coil, namely light-load starting frequency sensitive rheostat. For heavy starting frequency sensitive rheostat Online outsiders jacketed tubes, aluminum tubes is shorted secondary coil, it has to improve power factor and increase the starting torque effect.

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