Permanent Magnet Moving Coil PMMC

Tushar Jain, Shubham Chauhan, Ramkesh Sharma


The permanent magnet moving coil instrument or PMMC type instrument uses two permanent magnets in order to create stationary magnetic field. These types of instruments are only used for measuring the dc quantities as if we apply ac current to these type of instruments the direction of current will be reversed during negative half cycle and hence the direction of torque will also be reversed which gives average value of torque zero.


Permanent; Magnet Moving; Coil PMMC

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Copyright (c) 2014 Tushar Jain, Shubham Chauhan, Ramkesh Sharma

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