Order A Permanent Magnet DC Generator Now For Your Project

There are two basic types of generators to choose from. Belt – Pulley style and roller style.   They can be ordered from Amazon or directly from us to ship internationally for a shipping cost of $100 to $300 depending on how fast you want it shipped and to which country.


Dynamo with 2 inch pulley

datasheet pdf     user manual pdf

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Rubber Roller Dynamo Generator

datasheet pdf  user manual pdf

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This data was recorded using a WattsVIEW power monitor while charging a 12V Deep Cycle Duracell Battery Powerpack during a one-hour charging session.

For more information see the FAQ WEBPAGE.   If you want to buy a generator stand ready to go out of the box then go  HERE.


Generator Voltage Output Vs. RPMs

The data below shows actual data from a belt – pulley generator during a one hour bike riding session.   Remember that Watts  = Volts X Amps.  So the 2nd chart below (green chart)  is Watts which is simply the product of the red (Amps) and white (Volts) lines of the first chart.

Chart 1

Test / Benchmark Results
Volts / Amps
Chart 2

Test / Benchmark Results
Chart 3

Test / Benchmark Results
Calories / Watt-hours / Amp-hours


Dynamo Model PPG-PM300-P (Pulley Version)

PPG-PM300-R (Roller Version)

Output Voltage Range 0 to 40 Volts DC
Nominal Current Rating 15 Amps
Peak Current Rating 20 Amps
Peak Power Output (Charging 12V Battery) 300 Watts (15V x 20 Amps)
Drive Type 2″ Diameter Pulley . 1.5″ Diameter Roller 60 Durameter
Peak Operating Temperature 100℃
Cooling Method Air-cooled
Shaft Bearing Type Ball Bearing
Mounting Bolt Size 6 mm
Wire Lead Length ~12″
Wire Lead Size Size 12 AWG
Approximate Weight ~8 Lbs
Number of Poles (Brushes) 4
Generator Type This is a DC permanent magnet motor being used as a generator.
Peak to Peak Voltage Varies depending on RPMs (See this output waveform)
Voltage Output Vs. RPM Voltage Curve Graph
Rated Operating Speed 2800 RPMs
Internal Resistance ~ 0.35 Ohms
Dynamo PM generator internal resistance bicycle generating for different currents
Dynamo Internal Resistance

Typical Amp-hours During 1 Hour of Use5 to 10 @12VTypical Power During 1 Hour of Use100 Watt Hours (0.1 KWH)