DIY Bicycle Generator Test Results Benchmarks

TEST RESULTS - The power data in Watts below is from an actual one hour generating session. 125 beats per minute, 40 year old.

The data was captured using free power monitoring software from http://wattsview.com .

Here is the Wattage output from a different exercise / power generating session.

This data has been smoothed out using an averaging window of 10 data points to make it easier to read the graph.

Here is the specifications for this dynamo / generator

Dynamo Model	MNS-300-DC
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
Peak Operating Temperature	100 Degrees C
Cooling Method	Air Cooled
Shaft Bearing Type	Ball Bearing
Mounting Bolt Size	6 mm
Wire Lead Length	~12"
Wire Lead Size	Size 12 AWG
Approx 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 (See Resistance Graph)
Typical Amp Hours during 1 hour of use	~6 @12V
Typical Amp Hours during 1 hour of use	100 Watt Hours (0.1 KWH)

The test data below shows you Watt Hours and Amps from the bike generator. The vertical axis on the left (green) is the watt hours measurement.

The vertical axis on the right is current measured in Amps from the WattsVIEW current sensor sold at http://wattsview.com

Below you can see a voltage output graph of the do it yourself bike generator while it is hooked up to a 12 Volt Duracell powerpack.