In the same cage type asynchronous motor, in order to make the motor generate asynchronous starting torque, the rotor is also provided with a cage cast aluminum winding. A reaction tank corresponding to the number of poles of the stator (only the action of the salient pole portion, the non-excited winding and the permanent magnet) is opened on the rotor for generating the reluctance synchronous torque. According to the structure of the reaction tank on the rotor, it can be divided into an inner reaction type rotor, an outer reaction type rotor and an inner and outer reaction type rotor. The outer reaction type rotor reaction groove opens the outer circumference of the rotor to make the direct axis and the intersecting axis direction. Air gaps are not equal. The inner portion of the inner reaction type rotor is grooved, so that the magnetic flux in the cross-axis direction is blocked and the magnetic resistance is increased. The internal and external reactive rotors combine the structural characteristics of the above two types of rotors, and the difference between the straight axis and the intersecting axis is large, so that the force energy of the motor is large. Magnetoresistive synchronous motors are also classified into single-phase capacitor operation type, single-phase capacitor start type, and single-phase double-value capacitor type. Pressure sensor usually consists of a pressure sensor and a signal processing unit for measuring the pressure of liquids and gases. According to different test pressure types, pressure sensors can be divided into gauge pressure sensors, differential pressure sensors and absolute pressure sensors. According to the working principle, it can be divided into Ceramic Pressure Sensor, diffusion silicon pressure sensor, piezoresistive pressure sensor, sapphire pressure sensor and so on. Pressure Sensor,Miniature Pressure Transducer,Pressure Transducer,Hydraulic Pressure Transducer,pressure transmitter Xi'an Gavin Electronic Technology Co., Ltd , https://www.cngamicos.com