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

Now the end of the winding will rise to the clamp level and the current will decay across the 36 volt difference between clamp voltage and BEMF.

Some time when the motor current is near 0.5 amps the switch will turn on again and the cycle will repeat. The current that drives the motor is the average current.

The motor inductance divided into the winding voltage, 6V and 36 volts respectively determines the rate of winding current change.

We now can see that we have a skewed duty cycle and, as a consequence, a skewed current waveform

A modification that would extend the capabilities of this approach would be to change the winding structure to be bifilar, incidentally converting the motor to bipolar operation. However, the chief benefit of this design change is the self-clamping of the motor voltage through the body diode of the opposite switch. This does not entirely mitigate the clamp loss; leakage inductance between the bifilar strands limits the energy recovery.

® UltraFlo is a registered trademark of Nidec Corporation.

Contact! Home Cooling Fans Brushless DC Motors Spindle Motors

UltraFlo U60T 60mm x 25mm dc-powered tube axial fans with NBRX bearings cooling fans computer fans case fans tube axial fans air movers dc fans brushless dc fans Nidec Servo fans

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

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