Hysteresis-synchronous motor is a term used to describe a type of electric motor that uses hysteresis to operate in synchronism with an alternating current. There are several synonyms for this term, including synchronous motor, synchronous hysteresis motor, and self-starting synchronous motor. The motor operates by utilizing the principles of hysteresis, which is the tendency of a material to resist changes in magnetization. This allows the motor to maintain a constant speed under varying load conditions. Overall, this type of motor is widely used in industrial and commercial applications and is valued for its efficient operation and reliability.