Measurement of Leakage reactance using resonant??

Discussion in 'General Electronics Chat' started by micktosin, May 16, 2014.

  1. micktosin

    micktosin Thread Starter New Member

    Joined:
    Mar 20, 2012
    Messages:
    19
    Please how can I measure leakage reactance of a transformer using resoance? With C-=1.4uF, Leakage inductance= 20uH, magnetizing inductance=100uH, Switching frequency 30kHz, Turn ratio 9:3.

    P.s I have been trying to research on it, but no luck.
    Last edited: May 16, 2014
  2. crutschow

    crutschow AAC Fanatic!

    Joined:
    Mar 14, 2008
    Messages:
    6,965
    Location:
    L.A. USA
    If you short the transformer secondary, than any remaining reactance is due to the leakage inductance, stray winding capacitance, and the primary and secondary winding resistance. So if you determine the primary resonant frequency with the output shorted, you should be able to calculate the leakage inductance from that. This may help.
  3. studiot

    studiot E-book Developer

    Joined:
    Nov 9, 2007
    Messages:
    4,239
    Location:
    Somerset UK
    crutschow is correct.

    Here is the measurement procedure. You need three meters, current, voltage and power.

    Refer to the attachment.

    Short one winding and apply a low voltage to the other, increasing it until the rated current in that winding is achieved.

    At this point the equivalent circuit is as shown and the effective resistance, power angle, and leakage reactance can be calculated from the readings.

    Attached Files:

Similar Threads
Forum Title Date
General Electronics Chat Power Supply DC-ripple measurement Oct 23, 2014
General Electronics Chat How to convert DC V + A measurements values to AC +A values? Oct 13, 2014
General Electronics Chat Meter Guard Measurements Guard input Oct 3, 2014
General Electronics Chat IDAC and resistance measurement Sep 29, 2014
General Electronics Chat Oscilloscope Differential Measurement Sep 10, 2014

Share This Page