Nidec UltraFlo™ cooling fans and blowers
V12E Series Adds 24V Fans
to High-Performance Lineup		 New 24V Models for V12E Series

The full scope of high-end performance offered by the UltraFlo® V12E M9 series of cooling fans is now available to 24V applications.

The addition of 10 new 24V vane axial models includes both free-running and feedback-governed, speed-stable versions that span the broad PQ operating range of the popular Nidec 120 x 38mm series. All are offered with a comprehensive array of monitor and control options.

On-line documentation of the expanded V12E series is available here:

Speed-Stable V12E M9 Fans
Free-Running V12E M9 Fans

The minimum voltage that could be used for clamping is two times Vin max. That is because the BEMF will add to the input voltage.

For 18 volts applied at High Line a BEMF of 18 volts will be generated. This would result in a Voff of 36 volts.

Clamps, which have a tolerance, must be guard-banded, therefore, 42 volts would be a reasonable minimum clamp level to choose.

The motor current at 12 volts and 1500 RPM would be developed in a linear fashion with a 6 volt BEMF and 1.5 MH coil inductance

This current will start at about 0.5 amps and ramp to about 0.7 amps, whereby di = E dt/L, at which time the PWM would command the switch to turn OFF.

® UltraFlo is a registered trademark of Nidec Corporation.

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R. O. Whitesell and Associates is a manufacturer's sales representative for Nidec UltraFlo cooling fans and blowers and Nidec Servo fans.

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