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Selection of energy source depends on several factors, including energy availability, economic and power requirements. Hydro power is more cost effective than any other form of renewable power. This paper studies the performance of various stator designs in a micro hydro generator. The generator generates energy using rainwater that falls from the roof drainage system. The rainwater flows through...
This paper proposes a technique to detect the rotor position in a Switched Reluctance Motor(SRM) which only requires knowledge of the phase resistance and the number of stator and rotor poles. Accuracy can be further improved if prior knowledge of the mutual phase inductance is known. The technique operates by sensing the minimum inductance location which allows positional information to be obtained...
Sensorless position estimation based on signal-injection methods always requires a resistance- or inductance-based anisotropy. Therefore, a short-circuited electrical winding can be attached on the rotor. As will be derived in this paper, this method leads to both a resistance- and inductance-based saliency. By an experimental test setup, both saliencies are analyzed and compared towards their accuracy...
Interior permanent magnet synchronous motor (IPMSM) which has high power and high efficiency is usually applied to traction motor for hybrid electric vehicle. We focused on the following points: flat wire coil, interior permanent magnet.
This paper describes the design and development of a 5 kW, 150 rpm, air-cored, axial flux generator for use as a direct drive generator with small wind and water turbines. The generator uses trapezoidal shaped magnets to obtain a greater active length than that provided by circular magnets. The armature coils are also trapezoidal. A prototype generator has been tested and produces up to 5000 W at...
The commutator of dc motor is approximated by equivalent resistance circuit. Extremely different values are assigned to circuit parameters depending on the angular position of the rotor. Created for diagnostics purposes mathematical model of commutator dc motor with loop rotor winding is a set of stiff nonlinear differential equations. The characteristics of dc motor were investigated in failure conditions...
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