dV/dt Series A Filters

Product Overview

dV/dt Seres A Filters are designed to protect AC motors from the destructive effects of long-lead peak voltages. Depending on the turn-on time of the power semiconductors used in the inverter, size of the motor and cable length, these peak voltages can be extreme. Cable lengths as short as eight feet can result in motor peak voltages that exceed the rating of the motor’s insulation system. Using the filter guarantees the motor terminal voltage will not exceed a 1.5 drive bus voltage up to a distance of 1000 feet between the drive and motor. In specific applications, the filter has provided excellent performance with cable runs up to 3000 feet.

The MTE dV/dt Series A Filter is a passive fourth order device that reduces transmission line effects of motor cables by dampening the rate of voltage increase and minimizes the peak voltage that occurs at the motor terminals.

Performance Features & Benefits

Cooler running motor extends motor life
Reduced motor temperature & audible noise (typically 20–40^oC cooler).

Protects the motor and cable from high frequency components of PWM
Maximum peak motor terminal voltage with 1,000 feet cable or less is guaranteed not to exceed 150% of bus voltage.

Wide range of applications
For PMW inverters with switching frequencies between 900 Hz and 8 kHz, available in voltage ranges of 380VAC to 600VAC and motor sizes from 0.5 HP to 600 HP.

Protect motors from long lead effects
Reduce the destructive effects of peak voltages facilitated by long cable runs between the inverter and motor.

Literature & Documentation