Ametek Permanent-Magnet 40-volt DC Servo Motor/DC Electric Wind Turbine Generator

This Ametek 40V PMDC motor is near-new and not scavenged from an open-reel mainframe tape drive. Never used or installed, merely run 70-hours to produce data for a statistical quality-control database. . . . . It was originally designed to precisely position magnetic tape at slow or fast speed, so it has a 21-bar commutator, minimal starting voltage, and a linear torque curve. Magnetically shielded, RFI suppressed, and UL recognized. This "7980" series Ametek motor has four carbon brushes instead of the usual two. This results in lower resistance at the commutator, generates less waste heat, and prolongs brush life to 15,000 hours. . . . . Use it as a DC generator in a bicycle-style emergency power generator, a water-wheel electric generator, or a wind-electric generator. The simplest and quickest way to get into small-scale electrical generation is with an Ametek PMDC motor. This is a good motor for use as a direct-drive windmill electric generator because of its powerful magnets and high torque constant. It produces higher voltages and more current at a lower rpm than regular DC permanent magnet motors. . . . . This Ametek motor has a reputation for doing a decent job of generating electrical power from wind to charge 12V battery systems. This Ametek will generate 12+ volts (enabling it to charge 12 volt batteries) at about 360-rpm and higher. Under a full load this dynamo will max-out at roughly 420-rpm because as more torque input energy is applied to rotate the shaft, that rotational force is mostly converted into more electrical current rather than higher rpm. Maximum generated power output is roughly 400-watts under load. This load can be something such as a battery charger, a hydrolytic cell producing hydrogen fuel from water, or a "grid-intertie inverter" which synchronizes the power output of the wind electric generator and dumps it back into your house AC current line.