Permanent Magnet Motors

The following chart was produced by TLG Wind Power Products. Their website can be found here. I'm sure you'll find this information as useful as I have, referring to it often. Thanks TLG Wind Power!

AMETEK PM MOTORS

Since everyone keeps asking questions about the Ametek PM Motors I thought it was time to see what I could find. I searched the web and I have found the following data on the different Ametek motors. I've learned some things along the way as well, like Ametek made several different versions of the 40 and 50 volt motor (maybe more). All I know about these motors to date is here.

One thing I have found to be true, the best PM motor for use as a generator is the one that has the highest rated voltage at the lowest rpm. Meaning that if you have a PM motor that took 120 volts DC in and only turned the shaft at 300 rpm, you would know that it would put out some serious voltage as a generator. Windings make a difference in the amount of amperage they can produce. If you had a motor with windings the size of hair your output will be very low in amperage because the fine wire cannot carry the amperage.

I was not able to find exact Ametek part numbers but it seem that you can tell which one it is by the size of the motor and the difference in the shafts. All the motor have the Nominal voltage printed on them. Measure your motor and compare your measurements to this chart to know which Ametek motor you have. I did not take the reading, I simply found the data to share.

Some pictures of the Ametek motors below.

Ametek 20VDC KC8079F7	• Nominal voltage 20 VDC • 10/15 VDC • No load amps 0.47 • Shaft 5/8" diameter. x 11/16" long • 4" diameter. x 7" long • 550 RPM @ 20 VDC • Weight. 13 lbs.
Ametek 30VDC 080987K7 VERY GOOD Output Data	• Nominal voltage 30 VDC • 12/24 VDC • No load amps 0.15 • Shaft 5/8" diameter. x 1 7/8" long • 4" diameter. x 4 7/8" long • 325 RPM @ 30 VDC • Weight. 7 3/4 lbs.
Ametek 37VDC Also known as Ametek 36VDC NO GOOD	• Nominal voltage 37 VDC • 12/24 VDC • No load amps 0.35 • Shaft 5/8" diameter. x 2.0" long • 4" diameter. x 4 7/8" long • 2100 RPM @ 37 VDC • Weight. 8 lbs.	It seem that the most current version floating around of the Ametek 36 VDC motor has the same voltage to rpm ratio as the Ametek 30, but it does NOT have the output like the Ametek 30 has. It will work, but only as a trickle charger. (around 1 to 1.5 amps expected).
Ametek 40VDC 030689F7	• Nominal voltage 40 VDC • No load amps 0.50 • Shaft 5/8" diameter. x 1 1/4" long • 4" diameter. x 4 7/8" long • 1050 RPM @ 40 VDC • Weight. 11 lbs.
Ametek 40VDC 210988F7 Below Average	• Nominal voltage 40 VDC • No load amps 0.55 • Shaft 5/8" diameter. x 2" long • 4" diameter. x 7" long • 1600 RPM @ 40 VDC • Weight. 12 lbs.	Requires too many rpm to produce power in winds of less than 20 mph. If you want to use this one gear it up.
Ametek 50VDC	• Nominal voltage 50 VDC • No load amps 0.40 • Shaft 1/2" diameter. x 1 1/4" long • 4" diameter. x 4 7/8" long • 1200 RPM @ 50 VDC • Weight. 11 lbs.
Ametek 50VDC	• Nominal voltage 50 VDC • No load amps 0.60 • Shaft 5/8" diameter. x 1 7/8" long • 4" diameter. x 7" long • 1700 RPM @ 50 VDC • Weight. 12 lbs.
Ametek 50VDC 061087F7 GOOD	• Nominal voltage 50 VDC • No load amps 1.0 • Shaft 5/8" diameter. x 2" long • 4" diameter. x 7" long • 1800 RPM @ 50 VDC • Weight. 12 lbs. Has a 1" x 1/2" shaft out the backside	Although it requires higher rpm's to produce power, it has a higher amperage curve in output which makes up for the higher rpm needed. Click here to see a picture of the one I believe to be the best of the 50's Note the shaft out the back
Ametek 50VDC NO GOOD	• Nominal voltage 50 VDC • No load amps 0.60 • Shaft 1/2" diameter. x 1 1/4" long • 4" diameter. x 4 7/8" long • 2100 RPM @ 50 VDC • Weight. 11 lbs.
Ametek 60VDC NO GOOD!	Not even worth typing the info. (that bad)
Ametek 72VDC	• Nominal voltage 72 VDC • No load amps 0.41 • Shaft 5/8" diameter. x 1 7/8" long • 4" diameter. x 7" long • 1800 RPM @ 72 VDC • Weight. 12 lbs.
Ametek 99 VDC 010300F6 THE BOSS EXCELLENT Output Data	• Nominal voltage 99 VDC • No load amps 0.59 • Shaft 5/8" diameter. x 2 3/16" long • 4" diameter. x 9" long • 535 RPM @ 99 VDC • Weight. 16 lbs.	ALL GONE. No surplus that I have been able to find. I have not ran across one for close to two years. If you find one congratulations to you! ;)

Click on the images above to view larger pictures.