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# Electric Generators

Electric generators usually consist of a set of coils (rotor) spinning between two strong magnets (stator).  In general any moving magnetic force induces some electricity in the wires (conductors) that are close to it. The main challenges in designing an electric generator are identifying ways to optimize the production of electricity. Some of the ways you can increase the efficiency of an electric generator are using a very strong magnet and keeping the magnet very close to the coil. Here are some of the electric generators available at MiniScience.

Use this link for a Complete Price List of Generators.

## Bicycle Generator, 6-Volts

This is a small electric generator that may be attached to a bike or any turning tire to produce electricity. The amount of electricity depends on the speed of turning. It is rated as 6 Volt and 3 Watts.

When attached to a working model of windmill or water mill it can produce electricity to lit a few light a few miniature light bulbs. It must spin at a rate of 600 rpm or more to produce electricity.

## Bicycle Generator, 12-Volts

This is a small electric generator that may be attached to a bike or any turning tire to produce electricity. The amount of electricity depends on the speed of turning. It is rated as 12 Volt and 6 Watts.

When attached to a working model of windmill or water mill it can produce electricity to lit a few light a few miniature light bulbs. It must spin at a rate of 600 rpm or more to produce electricity.

## Wooden Generator, Science Kit

This is a DIY electrical generator for students who want to make their own electrical generator. In this model to rotor is a strong magnet (inside the box) that turns inside a conductive coil.

Fast turning of the wood dowel will lit the lights.

## Motor Generator DCGM301

 This is a motor generator rated for 3 V up to 18 V operation. When used as a motor the speed depends on the operating voltage. At 3 volts the speed is 120 RPM. Each additional volt increases the speed by 40 RPM. The exposed shaft is 4 mm in diameter and 10 mm long. The speed reduction mechanism in this motor is a planetary gear box.  Overall length: 66.5 mm  Diameter: 24 mm max  Connection wires: 20 cm long  Rated voltage: 5V - 18V  Operating voltage: 3V - 18V

Other features: Contain strong magnets and can operate as an electric generator.

Condition: Used
Warranty: 90 days

## Motor Generator DCGM302

 This is a motor generator rated for 3 V up to 18 V operation. When used as a motor the speed depends on the operating voltage. At 3 volts the speed is 170 RPM. Each additional volt increases the speed by about 70 RPM. The exposed shaft is 4 mm in diameter and 12 mm long. The speed reduction mechanism in this motor is a spur gear box.  Overall length: 64 mm  Diameter: 25 mm max  Connection wires: 15 cm long  Rated voltage: 5V - 18V  Operating voltage: 3V - 18V

Other features: Steel body; Off center shaft; , Contain strong magnets and can operate as an electric generator.

Condition: Used
Warranty: 90 days

## Motor Generator DCGM303

 This is a motor generator rated for 3 V up to 18 V operations. When used as a motor, the speed depends on the operating voltage. At 3 volts the speed is 83 RPM. Each additional volt increases the speed by about 40 RPM. The exposed shaft is 4 mm in diameter and 12 mm long. The speed reduction mechanism in this motor is Epicyclic gearing or planetary gearing. Overall length: 64 mm  Diameter: 25 mm max  Connection wires: 15 cm long  Rated voltage: 5V - 18V  Operating voltage: 3V - 18V

Condition: Used
Warranty: 90 days
Other features: Steel body; center shaft; , Contain strong magnets and can operate as an electric generator.

## Motor Generator DCGM304

 This motor operates with any voltage from 3 V up to 18 V. The speed depends on the operating voltage. At 3 volts the speed is 120 RPM. Each additional volt increases the speed by 50 RPM. The exposed shaft is 4 mm in diameter and 10 mm long. The speed reduction mechanism in this motor is a planetary gear box. Overall length: 66.5 mm Diameter: 24 mm max Connection wires: 20 cm long Rated voltage: 5V - 18V Operating voltage: 3V - 18V

Other features: Contain strong magnets and can operate as an electric generator.
Condition: Used
Warranty: 90 days

## DC Motor Generator, 1.5 V

A strong motor that can also be used as a generator to create semi DC electricity. Strong magnets used in this motor provide an extra torque at the expense of some lower speed.

A pair of this may be used to demonstrate the conversion of electrical energy to mechanical energy and vise versa.

## DC Motor Generator, 6 V

A strong motor that can also be used as a generator to create semi DC electricity. Strong magnets used in this motor provide an extra torque at the expense of some lower speed.

A pair of this may be used to demonstrate the conversion of electrical energy to mechanical energy and vise versa.

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