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DC Chopper

DC Chopper: DC Chopper are mainly dc to dc single stage conversion devices which provide a variable voltage on the load side when fed from a constant dc voltage source.…

Difference between Converter Fed and Chopper Fed DC Drives

Difference between Converter Fed and Chopper Fed DC Drives: Difference between Converter Fed and Chopper Fed DC Drives - For speed control of a dc motor it is necessary that…

Chopper Control of Separately Excited DC Motor

Chopper Control of Separately Excited DC Motor: Motoring Control : A transistor Chopper Control of Separately Excited DC Motor drive is shown in Fig. 5.41(a). Transistor Tr is operated periodically…

Chopper Fed DC Drives

Chopper Fed DC Drives: The variable voltage to the armature of a dc motor for speed control can be obtained from a dc chopper which is a single stage dc…

Chopper Type DC Amplifier

Chopper Type DC Amplifier: A simple ac amplifier Transformer may be used to amplify a dc input through the use of additional circuit component known as chopper. In this circuit,…

Chopper type DC Amplifier Voltmeter (Microvoltmeter)

Chopper type DC Amplifier Voltmeter (Microvoltmeter): Chopper type DC Amplifier Voltmeter the dc input voltage is converted into an ac voltage, amplified by an ac amplifier and then converted back…

Thyristorised Control of DC Electric Traction Motor

Thyristorised Control of DC Electric Traction Motor: The modern trend is towards the use of dc motors (both separately excited and dc series motors) equipped with thyristor chopper control. The…

Step Down Chopper with RLE Load Working Principle

Step Down Chopper with RLE Load Working Principle: The choppers are widely employed for speed control of dc motors in industrial and traction drives. Figure 27.30 (a) shows the basic…

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