Core losses occur in the steel core of the transformer due to themagnetizing currentneeded to energize the core. The magnetizing current remains the same during no-load and full load. Core losses are also known as iron losses in transformers. The core losses constitute two components: Hysteresis...
(1) Unbalanced three-phase load will increase the loss of transformer: The loss of transformer includes no-load loss and load loss. Under normal conditions, the operating voltage of the transformer is basically unchanged, that is, the no-load loss is a constant. The load loss changes with t...
Evaluation of No-Load Losses in the Single-Sheet, Double-Sheet, and Triple-Sheet Step Lap Joints of the Transformer Core Power transformers are crucial pieces of equipment in power grids, and the working of transformers directly impacts the safety of the power system. Transfo... Dawood, Kamran...
Linear Voltage Differential Transformer (LVDT): An inductive transducer having a primary winding and two secondary windings of wire around a magnetic core. The primary winding is excited by an AC voltage; the movement of the magnetic core by an applied force then causes a difference in the ind...
Excessive heating of magnetic cores, as a result of harmonic frequencies due to hysteresis and eddy current losses (equations (1.12) and (1.13)). 2. Overloading of neutral conductors due to third harmonic currents flowing through the neutral. The size of the neutral must be increased by 150...
The transformer which has a symmetrical shape is implemented with the thick metal for low IL propose. The simulated results show that the proposed SPDT switch achieves a minimum insertion loss of 1.64[Formula: see text]dB and the IL is better than 2.2[Formula: see text]dB across the range ...
3.The energy loses encountered in ferromagnetic cores are essentially of two groups: hysteresis losses and eddy-current losses .铁心中的能耗分为两部分:磁滞损耗和涡流损耗。 4.Discussion of Reducing the No-Load Loss and the Noise for Step-Laminated Core Transformer“阶梯叠”铁心变压器降低空载损耗和...
A microprocessor-based relay system is used in combination with relay contactors and a control circuit therefor to protect an electric motor from overload currents in addition to phase faults, ground faults, load losses, and load jams. T... RP Alley,WH Bicknell - US 被引量: 86发表: 1991...
1.1 Ventilation of the transformers As mentioned before, during its service a transformer produces heat due to losses. This heat must be dissipated from the room where the transformer is installed. For this purpose, one must ensure that there is adequate natural ventilation in the room. If not...
The invention provides a power supply apparatus for supplying electric power to a capacitive load. The apparatus has a transformer, a positive half-period driver and a negative half