control winding การใช้

• Two magnetic cores are used because the AC current will generate high voltage in the control windings.
• A small DC current from a low-impedance source is fed into the series-connected control windings.
• The amount of control current fed into the control winding sets the point in the AC winding waveform at which either core will saturate.
• The AC power windings are also usually configured so that they cancel out AC voltages that would otherwise be induced into the control winding.
• Ferrods were mounted in pairs, usually with different control windings, so one could supervise a switchward side of a trunk and the other the distant office.
• Regulation of the output voltage is achieved by controlling the current through a winding, either the field coil, or a control winding around a permanent magnet.
• The typical magnetic amplifier consists of two physically separate but similar transformer magnetic cores, each of which has two windings : a control winding and an AC winding.
• In addition, because of the particular arrangement of the power windings, the control winding, and the core, the control winding is well isolated from the AC power.
• In addition, because of the particular arrangement of the power windings, the control winding, and the core, the control winding is well isolated from the AC power.
• The currents would differ during wheel slip, producing a resultant flux that acted as the Control winding, developing a voltage across a resistor in series with the AC winding which was sent to the wheel slip correction circuits.
• Saturable reactors provide a very simple means to remotely and proportionally control the alternating current ( AC ) through a load such as an incandescent lamp; the AC is roughly proportional to the direct current ( DC ) in the control winding.