- The diode is connected across load in the controlled or uncontrolled converter circuit. This diode is called as freewheeling diode or flywheel diode.
- The freewheeling diode is connected across R – L load in the half controlled rectifier circuit as shown in the figure A.
- The load current passes through load as the SCR T1 is turned on during positive half cycle of the alternating supply.
- The energy stored in the inductor of the load.
- The stored energy of the load passes through freewheeling diode during negative half cycle of the alternating supply.
- If there is no freewheel diode, the stored energy of load back to the input supply.
Function of
freewheeling diode
- It improves input as well as system power factor.
- The load voltage polarity does not change.
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