NTC temperature sensor in the induction cooker

　　The electromagnetic cooker mainly uses the principle of electromagnetic induction and current thermal effect. From the AC power supply side, a bridge -type rectifier obtains a DC high -voltage connection to the exciting coil containing Ripple. Target the fast switch of the control power device IGBT to generate a high -frequency current in the excitement coil, which then generates a high -frequency magnetic field. The magnetic field induction of the metal container on the exciting magnetic coil (that is, the cooker) The container is heated and heated the food in the container.

　　Generally, two types of thermistor are used inside the induction cooker: one detection of the furnace surface temperature and the other to detect the working temperature of IGBT. Their role is that the temperature information transmitted is an important parameter of the temperature of the pot heated by the induction cooker. When the temperature of the furnace reaches the pre -set temperature, the induction cooker will be automatically closed. The induction cooker will be shut down. The temperature sensor feeds the measured temperature into the control system of the induction cooker to regulate the size of the current to achieve heating requirements of different functional modes.

　　In the process of generating a magnetic field, the induction cooker will generate large heat. It can detect changes in temperature through NTC thermistor to detect temperature changes to control the working conditions of the heat dissipation fan, thereby ensuring the safety of the heating process.

　　The resistance parameter used by the induction cooker is 100K, 1%accuracy, and the temperature sensor that needs to be encapsulated with a glass -packaged thermistor is required. Because the temperature range is high, the high temperature resistance is generally used. Whether it is a wire or or The resistance requires high temperature.

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