# What are the major issues caused by VFD (Variable Frequency Drive) and impact of VFD issues

**URL:** <https://forumautomation.com/t/what-are-the-major-issues-caused-by-vfd-variable-frequency-drive-and-impact-of-vfd-issues/838>\
**Category:** Industrial Automation\
**Created:** [March 8, 2016, 5:27am UTC](https://forumautomation.com/t/what-are-the-major-issues-caused-by-vfd-variable-frequency-drive-and-impact-of-vfd-issues/838 "2016-03-08T05:27:36Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![denizen](https://forumautomation.com/letter_avatar_proxy/v4/letter/d/848f3c/32.png) [@denizen](https://forumautomation.com/u/denizen)\
**Post date:** [March 8, 2016, 5:27am UTC](https://forumautomation.com/t/what-are-the-major-issues-caused-by-vfd-variable-frequency-drive-and-impact-of-vfd-issues/838/1 "2016-03-08T05:27:36Z")

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Issues of VFD (Variable Frequency Drive)

**Common Mode Current**

Electrical noise emission that can a)Disrupt nearby equipment b)Cause downtime c)Create quality control issue or process variability

**Capacitive coupling and cable charging**

Adjacent cable and motor leads absorb current from the motor and as a a result their performance degraded.This may cause drive to trip and go offline or lead to induced voltages in adjacent systems.

**Reflected wave voltage**

Voltage is reflected back to the motor and this increases the probability of motor or cable failure

**Application safety and reliability**

Electrical noise,additional current or reflected voltage may impact the safety and reliability of equipment