We now look at the magnet used in the appliance, the magnet in the electrical works its application based on the principle of magnetic field on the role of current-carrying conductors to generate amps can convert electrical energy into non-energy part of the role of magnetic fields on the current-carrying conductor. The magnet produced in the headset main vibration frequency is consistent with the current waveform of the same signal. If there is no ring magnet the magnet, the first half-cycle sinusoidal current through the coil generates a magnetic field in the electromagnet to attract the diaphragm, and a magnetic field generated in the other half cycle once again attract the diaphragm, each change of signal current week, the diaphragm will vibrate back and forth twice inside and outside, so that the sound emitted by the two frequencies of the signal current. These have brought a lot of convenience magnet pieces for our manufacturing and production, which can also bring a richer society for our lives. The main use of samarium cobalt magnets in passenger cars and trucks: now developed automotive sector in Europe, America and Japan have put samarium cobalt magnet eddy current brake technology products achievements - samarium cobalt magnet retarder as standard in more species-level passenger cars, medium and heavy-duty vehicles with a coat, as the existing automobile braking systems necessary complement system. Its retarder with its unparalleled advantages retarder start getting all the attention and favor manufacturers. High-speed trains: the kinetic energy of the high-speed trains trains several times larger than the average, while sticking coefficient and friction factor between the shoe and the drive wheels at high speeds between wheel and rail have reduced an order of magnitude, it must adopt a new high-speed train braking system . Use these industries are large, used in many small industries is a lot, and we will not list them here. _ New Tong Xin ring magnet magnetic magnets _ provided by the Dongguan City, Tong Xin magnetic Limited. Xin Tong, Dongguan City, the new magnetic Limited (www.dgxtxmagnet.com/) is Dongguan, Guangdong, magnetic leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In the new Tong Xin magnetic leadership with the staff warmly welcome all inquiries to discuss, with new magnetic Tong Xin a better future.