SPEED DETECTION CIRCUITS FOR PERMANENT MAGNET ALTERNATORS

摘要

A permanent magnet alternator (PMA) includes a rotatable shaft, windings, a shunt regulator circuit, and a speed detection circuit. The rotatable shaft is connected electromagnetically to the windings. The shunt regulator circuit is electrically connected to the windings. A current sense transformer with a primary coil is electrically connected to the shunt regulator circuit. A secondary coil is electrically connected to a comparator circuit with reference voltage and generates voltage pulse indicating PMA speed. The voltage pulses form an output corresponding to and indicative of rotation speed of the shaft suitable for processing by a processor to present a PMA speed indication for use in the overall system architecture as a measurement parameter.

主权项

1. A permanent magnet alternator, comprising:
a rotatable shaft electromagnetically connected to windings; a shunt regulator circuit connected to the windings; a speed detection circuit connected to the shunt regulator by a current sense transformer having a primary coil and a secondary coil, wherein the primary coil is electrically connected to the to the shunt regulator, and wherein the secondary coil is electrically connected to the speed detection circuit for generating voltage pulses corresponding to and indicative of shaft rotation speed using current returning to the windings through the shunt regulator circuit.