Reviews and Development Trend of Rotor Position Sensors for Motors

As a common electrical drive devices,motors are widely used in aerospace,industrial automation,home appliances and other occasions. With the expansion of research,switched reluctance motors,permanent magnet synchronous motors,brushless DC motors and other new types of motors have been proposed. These motors cannot work without rotor position signal. Rotor position sensor is the most commonly used device to detect rotor position,and the accuracy and environmental adaptability will directly affect the performance of system. This paper summarizes several types of sensors and elaborates their operating principles. Finally,applications and development trends of position sensors are discussed in order to provide a reference for selection and research of the motor position sensors.