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electrical_engineering_2:polyphase_networks [2024/06/18 03:20] – [Excercises] mexleadminelectrical_engineering_2:polyphase_networks [2024/11/17 10:30] (aktuell) – [7.2.2 Three-Phase System] mexleadmin
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   * Simple three-phase machines can be used for generation.   * Simple three-phase machines can be used for generation.
-  * Rotary field machines (e.g. synchronous motors or induction motors) can also be simply connected to a load, converting the electrical energy into mechanical energy.+  * Rotary field machines (e.g., synchronous or induction motors) can also be simply connected to a load, converting electrical energy into mechanical energy.
   * When a symmetrical load can be assumed, the energy flow is constant in time.   * When a symmetrical load can be assumed, the energy flow is constant in time.
   * For energy transport, the voltage can be up-transformed and thus the AC current, as well as the associated power loss (= waste heat), can be reduced.   * For energy transport, the voltage can be up-transformed and thus the AC current, as well as the associated power loss (= waste heat), can be reduced.
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 === Three-phase generator === === Three-phase generator ===
  
-  * The windings of a three-phase generator are called $\rm U$, $\rm V$, $\rm W$; the winding connections are correspondingly called: $\rm U1$, $\rm U2$, $\rm V1$, $\rm V2$, $\rm W1$, $\rm W2$ (see <imgref imageNo10>). \\ <WRAP> +  * The windings of a three-phase generator are called $\rm U$, $\rm V$, $\rm W$. \\ Often they are also colour-coded as red, yellow and blue - and consecutively sometimes also called $\rm R$, $\rm Y$, $\rm B$. 
 +  * The winding connections are correspondingly called: $\rm U1$, $\rm U2$, $\rm V1$, $\rm V2$, $\rm W1$, $\rm W2$ (see <imgref imageNo10>). \\ <WRAP> 
 <imgcaption imageNo10 | Motor Terminal></imgcaption> {{drawio>Motorterminal.svg}} </WRAP> <imgcaption imageNo10 | Motor Terminal></imgcaption> {{drawio>Motorterminal.svg}} </WRAP>
-  * The typical **winding connections**  in a three-phase generator are called **Delta connection** (for ring connection) and **Wye connection** (for star connection). This winding connection can simply be changed by reconnecting the motor terminal. In <imgref imageNo11> the two types of winding connections are shown. For the Wye connection, is often the star configuration shown, and for the Delta connection the ring configuration. For the Wye connection, it is also possible to have the star point on a separate terminal. <WRAP> +  * The typical **winding connections**  in a three-phase generator are called **Delta connection** (for ring connection) and **Wye connection** (for star connection). This winding connection can simply be changed by reconnecting the motor terminal. In <imgref imageNo11> the two types of winding connections are shown. For the Wye connection, it is often the star configuration shown, and for the Delta connection the ring configuration. For the Wye connection, having the star point on a separate terminal is also possible. <WRAP> 
 <imgcaption imageNo11 | Motor Terminal Setup for the two Connections></imgcaption> {{drawio>MotorterminalConnections.svg}} </WRAP> <imgcaption imageNo11 | Motor Terminal Setup for the two Connections></imgcaption> {{drawio>MotorterminalConnections.svg}} </WRAP>
   * The **phase voltages**  are given by: <WRAP>    * The **phase voltages**  are given by: <WRAP>