Now the use of electrical technology is becoming more and more sophisticated. For example, IH technology is widely used in rice cooker. The electromagnetic coil is connected to an alternating current, directly on the metal liner for surrounding heating. Used IH technology for electric rice cooker can to realize accurate procedures for rice stew of process control, according to the needs of rice in each phase of heating set different heating schemes. To achieve all the processes, there is a key point is the electromagnetic coil, a normal operation of the electrical appliances must rely on it. Most of the time it's easy to ignore, so few people pay attention to the quality and so on. Now it is to change the, after all, is our common home appliance, but also on the safety aspects of. We all need to know about it.