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

This is continuous operation only. If the motor is put into a current limit state with current limit set to 120% of max I nom or 2.5A, then we would lose 10 watts in the clamp diodes.

This power loss, especially under fault conditions, limits this method to lower power fans only.

The principles remain constant; however, the absolute power drops to a manageable level in the smaller fans.

As was indicated previously the duty cycle ratios are skewed also. This is due to the decay of the motor current over the large voltage used for clamps.

During the PWM OFF time the motor winding is clamped by the clamp diode, and that clamp diode provides the current decay path.

® UltraFlo is a registered trademark of Nidec Corporation.

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Electro Reps, Carmel, IN, phone 317-569-7202, is a manufacturer's sales representative for Nidec UltraFlo cooling fans and blowers and Nidec Servo fans.