Who is controlled by the heating speed of the electric heater?

This is to focus on the structure of the electric heater, the frequency converter can only change the frequency of the alternating current, thereby changing the rotational speed of the motor to change the output power of the motor.The electric heater is not rotated, energy efficient space heate and the frequency conversion cannot control the heating speed.Simple method has two types: 1. Use diode half-wave rectification, change the effective value of AC electricity, and achieve the purpose of changing heating power and heating speed; this method is the most application, its advantages are simple to operate simple operation..2. Transformer, small transformer variable pressure, the advantage is that the multi-file adjustment is that the circuit structure is more complex and the production cost is high.