21/03/2017

Type E Chopper ( Class E Chopper )

Introduction of type E chopper

The type E chopper is a four quadrant chopper. The type E chopper is parallel combination of two type C chopper. The combination of chopper CH1, chopper CH2, diode D1 and diode D2 makes one type C chopper and other is made from chopper CH3, chopper CH4, diode D3 and diode D4.  The DC supply is short circuited if chopper CH1 and CH4 or chopper CH2 and CH3 is simultaneously switched on. 

Power circuit diagram of type E chopper

Type E chopper, working of Type E chopper, Type E chopper circuit diagram, Type E chopper pdf, explain Type E chopper, Type E chopper pdf, Type E chopper diagram, four quadrant chopper,  class E chopper

Working of type E chopper

The working of type E chopper is explained here.

First quadrant

When chopper CH1 and chopper CH2 are switched on, the load current flows through (+)Vdc – A – CH1 – LOAD – G – CH2 – K – Vdc( – ). The output voltage and current both are positive therefore it is first quadrant operation.


Type E chopper, working of Type E chopper, Type E chopper circuit diagram, Type E chopper pdf, explain Type E chopper, Type E chopper pdf, Type E chopper diagram, four quadrant chopper,  class E chopper


Second quadrant

When chopper CH3 and chopper CH4 are switched off, the stored energy of inductor dissipates through G – LOAD – F –D1 – (+)Vdc – Vdc( – ) – L – D2 – H – G. The output voltage is positive but output current negative during that period therefore it is second quadrant operation.

Third quadrant

When chopper CH3 and chopper CH4 are switched on, the load current flows through (+)Vdc – C – CH3 – G – LOAD – F – E – CH4 – Vdc( – ). The output voltage and current both are negative therefore it is third quadrant operation.

Fourth quadrant

When chopper CH1 and chopper CH2 are switched off, the stored energy of inductor dissipates through F – LOAD – G – H – D3 – D –(+)Vdc – Vdc( – ) – D4  – F. The output voltage is negative but output current is positive during this period therefore it is fourth quadrant chopper operation.

Type E chopper, working of Type E chopper, Type E chopper circuit diagram, Type E chopper pdf, explain Type E chopper, Type E chopper pdf, Type E chopper diagram, four quadrant chopper,  class E chopper

Type E chopper as step down chopper

When the chopper works in first and third quadrant, the output voltage is always less than the input voltage resulting it is step down type chopper

Type E chopper as step up chopper

Similarly when the chopper works in second and fourth quadrant, the output voltage is always greater than the input voltage resulting it is step up chopper

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