What is load characteristics of DC generator?
Load characteristic essentially describes how the terminal voltage of the armature of a generator changes for varying armature current Ia. First at rated speed, rated voltage is generated across the armature terminals with no load resistance connected across it (i.e., with S opened) by adjusting the field current.
Which is the characteristics of a DC?
The fundamental characteristic of a DC signal is the absence of changes in polarity. If you connect a DC voltage signal to a resistor, the resulting current will always flow in the same direction. The magnitude of the current may exhibit large variations, but the direction does not change.
What are the characteristics of series wound DC generator?
There are generally three most important characteristics of series wound DC generator which show the relation between various quantities such as series field current or excitation current, generated voltage, terminal voltage and load current.
What is internal characteristics of DC generator?
The internal characteristic curve represents the relation between the generated voltage Eg and the load current IL. When the generator is loaded then the generated voltage is decreased due to armature reaction. So, generated voltage will be lower than the emf generated at no load.
What are the various operating characteristics of different DC generators explain in brief magnetization characteristics of separately excited DC generator?
The external characteristic of the separately excited DC generator is obtained by subtracting the drops due to ohmic loss (Ia Ra) in the armature from generated voltage (Eg). Terminal voltage(V) = Eg – Ia Ra. This curve gives the relation between the terminal voltage (V) and load current.
Which of the following characteristics reveal about the magnetization nature of the DC machine?
Which of the following characteristics reveal about the magnetization nature of the machine? Explanation: Both no-load and load characteristics are required to predict the magnetization of the machine. Explanation: Armature characteristic is observed at constant terminal voltage for emf vs armature current.
Which of the following characteristics reveals about the magnetization nature of the machine?
Which of the following characteristics reveal about the magnetization nature of the machine? Explanation: Both no-load and load characteristics are required to predict the magnetization of the machine.
Which of the following characteristics is also called load characteristics of synchronous generator?
External Characteristic (V/IL): External characteristics are very important to determine the suitability of a generator for a given purpose. Therefore, this type of characteristic is sometimes also called as load characteristic.
Which of the following characteristics reveal about the magnetization nature of the machine?
Which of the following characteristics reveal about the magnetization nature of the DC shunt generator?