A line commutated phase-controlled inverter is operating at its inverter limit. There can be a commutation failure if

Both voltage and frequency change such that v / f is constant.

A line commutated phase-controlled inverter is operating at its invert

1.	A line commutated phase-controlled inverter is operating at its inverter limit. There can be a commutation failure if
A.	The frequency decreases
B.	The voltage increases
C.	The frequency increases
D.	Both voltage and frequency change such that v / f is constant.
Answer» D. Both voltage and frequency change such that v / f is constant.