Let’s focus on the TMdrive-MVe2’s Exceptional by Design™ feature:  Built-in Reactive Power Control

All Variable Frequency Drives (VFDs) provide motor speed control (with potential energy savings and improved process control),

and some degree of motor protection.  Voltage-source VFDs (typically with diode rectifiers and capacitor DC link) isolate the

poor power factor of their connected motors from the utility.  For example, a motor with a power factor of .82 lagging would

have its power needs met by the output of the VFD, while the input reflects a much improved power factor of (typical) 0.95

lagging.

TMEIC’s TMdrive-MVe2 VFD input converter is configured with a unique “Active Front End” that uses active switches in place of

diode rectifiers.  This allows the converter of the VFD to hold unity power factor at its input terminals.  But the TMdrive-MVe2

and control goes beyond that and can actually correct the system Power Factor demands of other nearby utility loads without

adding capacitors.

Utility Plant Power

Typical Industrial loads such as shown in the one-line below consist of motors for plant processes, special equipment unique

to the facility, and other loads such as plant lighting and HVAC.  In AC systems, the current that flows is divided into two

components, real power measured in kiloWatts (kW) and reactive power measured in kilovars (kVARs).  Both types of power

draw current (amperes) from power delivery equipment such as transformers, cable, and switchgear.  Current flow results in

voltage drop, heating and wasted energy.