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← ScienceWhich risk increases when a motor drive's DC link capacitance degrades?
A)Overshooting voltage transient propagation✓
B)Reduced common-mode harmonic emission
C)Decreased regeneration current ripple
D)Increased flux-vector decoupling margin
💡 Explanation
Degraded DC link capacitance causes increased voltage ripple during switching because the charge storage capability declines; transient overshooting occurs due to under-damped filter characteristics. Therefore, ringing amplification, rather than ripple smoothing occurs, which leads to increased failure rate.
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