V12E Series Adds 24V Fans to High-Performance Lineup

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

Another approach considered was the Full Bridge Topology.

Here the motor is energized in Bipolar mode by alternately energizing opposing switches Q1 and Q4, then Q3 and Q2.

In this manner the motor coil is connected to Vin and ground. Diodes D1, D3, D2, D4 are not clamping zeners, rather they are steering diodes used to prevent the reversal of polarity across the switches by returning the current to the source.

Voltage is therefore limited to Vin rather than 2 Vin + Vclamp.

This would appear to be the best choice for driver/motor topology; however, there are some disadvantages.

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Schuster Electronics is a franchised distributor of Nidec UltraFlo cooling fans and blowers and Nidec Servo fans.