步进电机使用的一些问题(国外英文资料).doc

步进电机使用的一些问题(国外英文资料) Selection, calculation method and some problems of application of stepping motor A stepper motor is an electromagnetic actuator that converts a digital input pulse into a rotating or linear incremental motion. Each input shaft of a pulse motor moves into a step angle increment. The total rotation angle of the motor is proportional to the input pulse number, and the corresponding rotation speed depends on the input pulse frequency. Stepper motor is one of the key components of mechatronic products. It is usually used for positioning control and constant speed control. Stepper motor has low inertia, high positioning accuracy, no accumulation error, simple control and so on. Widely used in mechanical and electrical integration products, such as: CNC machine tools, packaging machinery, computer peripherals, copiers, fax machines, etc.. When stepping motor is selected, the output power of stepping motor should be ensured to be greater than the power required by the load. When selecting the power step motor, the load torque of the mechanical system should be calculated first, and the torque frequency characteristic of the motor can meet the mechanical load, and there is a certain margin to ensure the operation of the motor. In the actual work process, the load torque at various frequencies must be within the range of the torque frequency characteristic curve. Generally speaking, the maximum static torque Mjmax large motor, load torque. When stepping motor is selected, the step angle should be matched with the mechanical system so that the pulse equivalent of the machine tool can be obtained. In the mechanical transmission process, in order to make a smaller pulse equivalent, one can change the lead of the screw, and two can be completed by stepping motor subdivision drive. But segmentation can only change its resolution without changing its accuracy. The accuracy is determined by the inherent characteristics of the motor. Stepper motor power to choose,