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Magnetic Amplifier (Positive & Negative Feedback)


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Magnetic Amplifier (Positive & Negative Feedback)

Magnetic Amplifier Trainer Positive & Negative

Amplification is the control of a larger output quantity by the variation of a smaller input quantity. Such amplification can be performed by a magnetic device called Magnetic Amplifier or Magamp. This set up is designed to study the basic characteristics of such amplifier with +Ve & “Ve feedback. The set up consists magnetic amplifier, AC and DC power supply, two meters for load and control currents and a fixed value RL. The set up to study the characteristics of magnetic amplifier, has two identical gate windings wound upon split deltamax cores, which are joined together to form a common central limb. The DC control winding is wound upon this central limb with the amplifier feedback winding in / out mode. A control bias battery in form or regulated DC 0-3 volt supply with a DC m Ameter to read IC, and current limit resistance is provided to study control winding may be changed with polarity selector. Afixed value (50 ohm) RL with stepped down fixed AC supply, with a dc ammeter to read load current IL, is provided with gate winding 

TECHNICAL SPECIFICATIONS

To study input-output characteristic of a magnetic amplifier

  • Two saturable reactors in one frame.
  • Two Rectifiers.
  • Fixed Resistive load.
  • DC bias voltage.
  • One potentiometer.
  • Two digital meters.
  • IC regulated power supply for complete circuitry.
  • 220V ±10%, 50Hz mains operated.
  • User’s Manual with patch cords.

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