Inverted rotor induction motor has additional rotor rings. These rings are used to make connection for the rotor measurement coils. These coils have been used to investigate induced voltage on the rotor.
Induction motor 3 phase can be analyzed by using the equivalent circuit of one phase. Work factor can be calculated using the impedance vector calculating input, but this may not be able to give an immediate association between the input voltage to decrease with the increase of power factor. For this analysis the amount of torque required and speed rotary motor that can be represented by the amount of slip.
A high-voltage, direct current (HVDC) electric power transmission system uses direct current for the bulk transmission of electrical power, in contrast with the more common alternating current systems. For long-distance transmission, HVDC systems may be less expensive and suffer lower electrical losses.
Subtransmission is part of an electric power transmission system that runs at relatively lower voltages. It is uneconomical to connect all distribution substations to the high main transmission voltage, because the equipment is larger and more expensive.
Steel is a metal made of iron with carbon mixture. Based on a mixture of carbon, steel is categorized into three kinds, namely: steel with low carbon content (0-25%), steel with medium carbon content (0.25 to 0.55%), and steel with high carbon content (above 0 , 55%).
Copper has high electrical conductivity that is 57? mm2 / m at a temperature of 200C. Temperature coefficient (?) copper 0.004 per 0C. Copper resistivity against temperature curve is not Linie.
Pure aluminum has a density of 2.7 g/cm3, ? her 1.4. 10-5, melting point 6580C and not corrosive. Conductivity of aluminum by 35 m/ohm.mm2 or roughly 61, 4% conductivity copper. Be formed because of soft pure aluminum, the tensile strength only 9 kg/mm2. For that if aluminum is used as the Conductor of dimensions large enough, always.