A simple method is to use a permanent magnet DC motor as a generator and install a wind wheel. Since it is impossible to rotate at high speed, you can choose a DC motor with a high voltage resistance, so that you can do this. Get higher voltage even if it is low, you can choose low voltage power supply, which can stabilize the voltage to charge the battery. You can choose the lithium battery used in mobile phones. You no longer need to stabilize the voltage. than 4.5V. You can connect a silicon diode in series to illuminate the light-emitting diode with high brightness. This type of battery No memory, you can use it with confidence, the mechanical part can be done by yourself according to your own needs.
How much does a small wind turbine cost?
Although there are many types of wind turbines, theyThey can be divided into two categories: ① Horizontal axis wind turbines, the axis of rotation of the wind wheel is parallel to the direction of the wind; wind turbines, the wind wheel The axis of rotation is perpendicular to the ground or to the direction of the air flow. Horizontal axis wind turbine: Horizontal axis wind turbines can be divided into two types: lifting type and drag type. Lift wind turbines spin quickly, while drag wind turbines spin slowly. For wind power generation, step-up type horizontal axis wind turbines are mainly used. Most horizontal axis wind turbines are equipped with a wind-facing device that rotates when the wind direction changes. For small wind turbines, this wind device uses a tail rudder, while for large wind turbines, a wind direction sensing element and a servo system are used. A wind turbine withof a transmission mechanism consisting of a motor and a wind wheel in front of the tower is called a leeward wind turbine, while the wind wheel behind the tower is a leeward wind turbine. There are many styles of horizontal axis wind turbines. Some have the wind turbine blades reversed, some are installed on another tower, which can reduce the cost of the tower when the power output is certain, and some generate vortices around the wind turbine to focus . air flow. Increase airflow speed. Vertical Axis Wind Turbines: Vertical axis wind turbines do not need to face into the wind when the wind direction changes, which is a major advantage over horizontal axis wind turbines. This not only simplifies the structural design, but also reduces the gyroscopic force when the wind wheel faces the wind. There are several types of vertical axis wind turbines that use reresistance to turn. One of them is a wind wheel made of flat plates and quilts, which is a pure resistance device; the S type wind turbine has some lift, but is. primarily a resistance device. These devices have a high starting torque but a low tip speed ratio and provide low power output when the size, weight and cost of the wind turbine are fixed.
A complete set of small wind turbines for home use costs between 2,000 and 5,000 yuan, and the capacity and quality of the batteries vary greatly. The biggest weakness of wind turbines is their strong seasonality. Northern coastal areas can provide stable power supply most days in spring, but it is intermittent in summer and inland areas can only provide power intermittently.