Home > Permanent Magnet Alternators >

DC-520 High Wind Permanent Magnet Alternator
Wind Blue High Wind Permanent Magnet Alternator
Ready to Bolt-On to your Wind or Hydro Project Today!!

Additional Photos:

DC-520 Permanent Magnet Alternator
Price $219.00

Quantity in Stock:(Out of Stock)
Availability:: Usually Ships in 24 to 48 Hours
Product Code: DC-520

Features a 303 Stainless Steel Shaft for ultimate corrosion protection and increased power output. The shaft also features a standard thread size of 5/8 x 18 threads per inch and a KEYWAY for easy adaptation to your project.

It has a 5mm x 5mm x 12mm keyway in the shaft in order to make custom adaptations easier to apply. Using the key will ensure that a counterclockwise rotation will not loosen the shaft nut. It will also make it easier to use a lovejoy, etc. The pulley and spacers still need to be sandwiched between the shaft nut and front spacer. Failure to do so will result in damage to the PMA.

All WindBlue DC-520 and DC-540 Alternators are equipped with a 3-phase External Rectifier Output pigtail. This small black connector on the back of the unit allows you to run less costly 3-conductor wire to your battery location instead of large heavy battery cables. Once at the battery location the 3-phase power is fed into an External Rectifier (sold separately) and converted to DC for connection to the battery.

Note: WindBlue External Rectifier output equipped alternators can still be connected for DC output by using the battery terminal on the back of alternator, however, only one output should be connected to your batteries at a time. The other should be left unconnected.

WARNING: The 3-phase External Rectifier output connector DOES NOT make your alternator a “Grid-Tie” unit so don’t try to wire the AC leads into the fuse box of your house as death, fire, and destruction will likely result !!

The DC-520 model is best suited for wind generator applications in areas which average 10 MPH winds or more. Reaches 12 Volts at 240 RPM. The chart below represents actual output on a test stand. Voltage readings were recorded with the circuit open (No Load) while Amperage was recorded with the output shorted (Max Load). Your system setup will determine what output you will see in the “real world”. For example a dead battery will pull much more current similar to the shorted output reading than will a fully charged battery. Also the voltage will rise until it meets the voltage of your battery and then level off as the battery is “absorbing” the excess voltage as it charges. The output is unregulated. You should be sure and run a 30 or 40 amp fuse on the output to prevent damage to the unit if your load becomes excessive. Also, consider using a charge regulator so your batteries don’t become overcharged. On our test stand with a 12 Volt battery connected, the PMA produced 28 Amps at 2000 RPM.

Below is amp graph, tested with maximum load (output shorted). This test is based on a 12 volt dc circuit:

Here is the voltage graph, tested with no load, (open circuit) :

For use as a direct drive wind generator, select a fast set of blades and you should start charging a 12 volt battery setup in about 12 mph winds. This unit passes the 12 volt mark at just 275 RPM. The “Hyper-Spin” rotor from is a good choice. Many other websites offer good rotor designs and even plans for rotors if you would like to build your own, just make sure it has a 17mm hub to fit a standard Delco alternator shaft.

  • This PMA features the following:
  • Completely Brushless design eliminates the need for maintenance and reduces friction.
  • Specially wound High-Output stator.
  • Super Strong N50 grade Neodymium rare earth magnets are at its core to replace the inefficient electromagnetic field coil.
  • Zero Cogging
  • It is built using Brand New GM Delco alternator components including Stator Coils, factory balanced shafts and New Rotor Pole Shoes. Replacement bearings and parts will be available for years.
  • Built-in rectifier. (DC output is unregulated)
  • This unit can be used in a direct drive wind turbine, hydro-electric application, geared up wind systems.
  • Built to last with new bearings and a baked on clear ceramic finish that will last for years in harsh outdoor environments.
  • 90 day full replacement warranty on all units (Warranty void if PMA has been opened or tampered with)
  • Reaches 12 Volts output at just 240 RPM and the voltage keeps going up from there.
  • Produces 28 Amps into a 12 Volt battery at 2000 RPM.
Average Customer Review: 5 of 5 Total Reviews: 2 Write a review.

  0 of 0 people found the following review helpful:
Its working as of today. June 15, 2013
Reviewer: Maui Tropical Plants Maui from Waihee, HI United States  
When looking for a PMA always look at the review and warranty when buying because some say only 15 days some say 1 month and others give you dumb answers on warranty some never get back to you.

So far so good it give me what it says it will great product and clean and neat highly recommend this product and company.

Was this review helpful to you?

  15 of 17 people found the following review helpful:
hydro app September 22, 2008
Reviewer: roys ellis from Waihee Valley, HI United States  
Built a water wheel using a 540 PMA. Got 80 Amp/hrs per day. Got one of these 520 units and installed it a week ago. Out put has almost tripled to 230 amp/hrs per day into my 12V system. roys@aloha.net if you would like details. Excellent product with super service from WincBlue.

Was this review helpful to you?

(Your shopping cart is empty)