Permanent Magnet DC Generators

Windstream offers a selection of Low RPM Permanent Magnet DC generators. We have supplied manufacturers, schools, contractors, science museums, inventors and hobbyists with generators for over 35 years. Performance curves and specifications are available on each generators.

These are by far our most popular generators. The predecessor of this line of generators, the TC-25G sold over 10,000 units in the 1970's. These generators are so sensitive that they generate power at any RPM. They are compact and have a wide operating range so they are sure to work in many applications. In fact, these are the same generators found in our own Human Power Generator, and Bike Power Generator .

One of the best qualities of these generators in battery charging applications is that the generator will generate electric current based on load. This means that if a battery is fully discharged it will accept a great deal of power to charge it, but as it approaches a full charge, the amount of electricity accepted will be very little. In terms of the generator, the generator will be more difficult to turn when the battery is discharged and very easy to turn when it is full.

• More about Torque in Generators
• More about Startup Torque

You may want to purchase a "POWER-UP" Diode Kit with your Generator if you are charging at 10 amps or under.  We also have the Full Wave Bridge Rectifier for applications charging at up to 35 amps - see spare parts.

These generators are not waterproof. If you are using them in an outdoor application, they must be sealed from the weather.

Note: While we do our best to support hobbyists and inventors with their projects, we cannot supply complete designs for power generation without charging engineering consulting fees.

It is imperative that one come to their project with an understanding of the function of rpm and load and how these factors affect power output. With unique applications, it is very common to experience trial and error. It is not always possible to match a generator to the application without trying it first - though we will do our best to assist, there are often so many unique and unknown variables we can only guarantee what we know - which is the operating range of each generator ( please see continuous vs.intermittent duty information for each generator).   Our generators are a non-returnable item.