A 500/200v single phase transformer has primary resistance of 0.5Ω and reactance of 3.7Ω, while the secondary resistance and reactance […]
CONSTRUCTION OF ELECTRICAL REMOTE CONTROL MOTOR CARPREPARED BY: Soyombo oluwajuwonlo gabriel 2018702030240Sangodoyin ajibola mujeeb 2018702030237Sowunmi sunday Joseph 2018702030239Sunmonu akinkunmi quadri
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MACHINE (WORK 1) (A) M.A = F.R, M.A = load/effort or output force/input forceWhere F.R = force ratio(B) Velocity ratio
Vc = (3 × 10⁶)/√2 • r × inD/r where D is the spacing Conductor and r is the radius
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SHORT CIRCUIT TEST: The secondary is short-circuited through a suitable ammeter, A2, While a lot voltage is applied to the primary and adjusted to circulate full-load current in the primary and secondary circuit iron losses is negligible and wattmeter reading is that of copper losses in the windings [ iron loss a (flux)² applied voltage which is small about 1/30 of V1]
Constant Losses: The iron loss due to hysteresis and Eddy currents are constant at all loads because Flux variation between no load and full load is 2%-5%
Variable Losses: The copper loss depends on the load since variation of load from no load to full load is 100%.
