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Wireless Sensor Networks
Published in Dariusz Pleban, Occupational Noise and Workplace Acoustics, 2020
The highest power values are obtained when the generators are loaded with low-value resistance receivers and voltages generated at their outputs are included in the range from 0.2 to 1.2 V. When applied in power supply systems, the generators need to be equipped with electric power conversion circuits with MPPT capacity and a voltage booster. Even for small temperature differences between the hot side and the cold side of the generator, it is possible to obtain electric power values up to 10–20 mW which is sufficient to supply some sensor modules. The power values exceeding 90 mW can be achieved at higher temperature differences and are adequate to power sensor modules in which the electric power demand is relatively high. From the above-described merits, it follows that thermoelectric generators have the potential to be widely used as power sources for certain immovable components of wireless sensor networks in industrial conditions. Figure 4.11 presents an example design solution of a noise sensor powered by a thermoelectric generator.
Hydropower and Marine Energy
Published in Radian Belu, Fundamentals and Source Characteristics of Renewable Energy Systems, 2019
DC generators or dynamos are electrical machines that produce direct current with the use of a commutator. Dynamos were the first electrical generators capable of delivering power for industry, and the foundation upon which many other later electric-power conversion devices were based, including the electric motor, the alternating-current alternator, and the rotary converter. Today, the simpler alternator dominates large-scale power generation, for efficiency, reliability and cost reasons. A dynamo has the disadvantages of a mechanical commutator. Also, converting alternating to direct current using power rectification devices (vacuum tube or more recently solid state) is effective and usually economic.
Control of Three-Phase Induction Machine Drives During Open-Circuit Fault: A Review
Published in IETE Journal of Research, 2022
Rahemeh Tabasian, Mahmood Ghanbari, Abdolreza Esmaeli, Mohammad Jannati
In electric drive systems, the electric power conversion is done by power electronic converters. In recent years, different advanced electric drive systems have been presented. The goal of these studies is to increase drive performances respecting efficiency, cost, size, reliability, etc. [103,104,105]. The configuration of a typical machine drive utilizing TPIM is shown in Figure 1. The system consists of sensors, TPIM, control unit, and converter. In Figure 1, the sensors give information about the real operation of the TPIM. Then, the control unit uses this information and compares it with the reference value, and lastly the supplied voltages or currents to the machine are modified through a power converter.