Free Expert Guides on Power Systems, Circuit Design & Electrical Troubleshooting

Protection circuit of Vce increaseing when IGBT overcurrent is adopted

Shunt Wound DC Generator DefinitionIn shunt wound DC generators, the field windings are connected in parallel with the armature conductors. In these types of generators the armature current (Ia) splits into two parts: the shunt field current (Ish) flows through the shunt field winding, and the load current (IL) flows through the external load.Three most important characteristic of shunt wound DC generators are discussed below:Magnetic CharacteristicThe magnetic characteristic curve shows the rel

Wave Winding: Simplex, Duplex, Retrogressive And Progressive Wave WindingsKey learnings:Wave Winding Definition: A wave winding is defined as a type of armature winding where the end of one coil connects to the start of another, creating a wave-like pattern.Simplex Wave Winding: Simplex wave winding has odd back pitch and front pitch that are nearly equal and suitable for high voltage, low current machines.Duplex Wave Winding: Duplex wave winding involves two parallel paths and is used for highe

Magnetization Curve of DC GeneratorKey learnings: Magnetization Curve Definition: The magnetization curve of a DC machine shows the relationship between field current and armature terminal voltage on an open circuit. Importance: The magnetization curve indicates the saturation of the magnetic circuit, crucial for understanding the generator’s efficiency. Saturation Point: This point, also known as the knee of the curve, shows where further increases in field current yield minimal increases in fl

Phase protection circuit of three-phase three-wire system

Series Generator DefinitionA series wound DC generator is defined as a generator where the field windings, armature windings, and external load circuit are connected in series, causing the same current to flow through each part.In these types of generators the field windings, armature windings and external load circuit all are connected in series as shown in figure below.Therefore, the same current flows through armature winding, field winding and the load.Let, I = Ia = Isc = ILHere, Ia = armatu

Definition of Separately Excited DC GeneratorA separately excited DC generator is defined as a DC generator where the field winding is powered by an external source.Magnetic or Open Circuit CharacteristicThe curve which gives the relation between field current (If) and the generated voltage (E0) in the armature on no load is called magnetic or open circuit characteristic of a DC generator. The plot of this curve is practically same for all types of generators, whether they are separately excited

Phase protection circuit of three-phase four-wire system

Overvoltage, undervoltage, overheat protection circuit

Surge proof soft start circuit with relay