Electromagnet is only suitable for intermittent work, such as 1 seconds on and 1 seconds off,electromagnet in the work increase the temperature, can not keep open for a long time, so the need to control the power time, to avoid power time too long caused by too high temperature damage electromagnet,fast cooling environment is more conducive to service life. Widely used in automation equipment, such as game machines, slot machines, ticket vending machines, cash registers,Automatic equipment, etc.