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Derivation of Driving Torque Equation for Energy Meter By- Pawan Chandani

ecc angle Pc PC Highly Inductive (Energy Meter) PC-Highly Resistive (Wattmeter) Pc 90 C ecc ep

cc, epc e c ecc

414 T cos (L or VI cos (90+a) () VI [2coso(sin(a- )] 2coso(-,Constant riing Torgue

Energy Meter Idealle, PC Highly Inductive Gear 0 5617 Registrating System +-Spindle Shunt Shading 1 Phase AC Supply Braking Magnet Al Disc 90 Magnet ep ecc

414 T cos (L Pc ecc/ VI [2coso( sin (a- )

= VI sin ( VI | sin (a-f)-cos thatoe use hading ing to increase the value of A close to 9o' ?ng to increase the value of A close to 30 o that we use

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