Stepper motor is a kind of induction machine, its work principle is to use electronic circuit, will become a time-sharing power supply, dc multiphase sequential control current, in this current for stepper motor power supply, stepper motor can be normal operation, is a stepper motor drives of time-sharing power supply, multiphase timing controller. Despite stepping motor has been widely used, but the step motor doesn't like a general dc motor, ac motor used in practice. It has to be made by double circular pulse signal, power drive circuit of control system can use. So good with step motor is not easy, it involves the mechanical, electrical, electronic and computer and many other professional knowledge. Stepper motor as the performance of the component, is one of the electromechanical integration of key commodities, widely used in all kinds of automation control system. Follow the development of microelectronics and computer technology, accumulate over a long period, the demand for stepping motor has already come into common use in various fields of national economy. Stepper motor can only use the digital signal control, pulse provides stepper motor drives, in a short time, control the number of pulses announced too much, also is the pulse frequency is too high, will cause plugging a stepping motor. To solve this question, it is necessary to choose way of deceleration. That said, the stepper motor started to gradually increase the pulse frequency, pulse frequency demand gradually slowing. This is what we call 'deceleration' measures. Stepper motor speed, which is based on the change of the input pulse signal to change. In theory, to drive a pulse, stepper motor is a step away from the Angle of rotation (Segmentation for a subdivision step Angle)。 In fact, if the pulse signal change too fast, step motor as the internal counter electromotive force of the damping effect, between rotor and stator magnetic response will follow the change of electrical signals, cast the locked-rotor and step. Stepping motor driven actuators move from one location to another location, to experience rising speed, constant speed and deceleration process. When the stepper motor operation frequency is less than its own start frequency, can start directly with operating frequency and frequency operation, demand was suspended, can be directly from operating frequency to zero speed. So the stepper motor in high speed startup, needs to choose pulse frequency up to also have to slow down the process when suspension, to ensure the completion of stepper motor fine positioning control. The principle of acceleration and deceleration are the same. The rise and fall of commonly used stepping motor frequency control method has two kinds: linear lifting and exponential curve fluctuation frequency. Index curve method has stronger Shadowed, but poor balance when speed change is larger. Good stability, the method of lines and rapid positioning method can be used for a wide speed change. Concentrate on the following mini stepper motor and intelligent stepper motor drive engineering solutions experts mountain club will accelerate instances to illustrate: motor skills engineers to accelerate the process, is by the root frequency (Below the step-motor direct starting the highest frequency)To jump frequency (Gradually accelerated frequency)Constitute the acceleration curve (Slow down process instead)。 Jump frequency refers to the stepper motor on the bedrock frequency progress step by step frequency, this frequency is not too big, otherwise it will produce locked-rotor and step. Deceleration curve is commonly index curve or by repairing the exponential curve, of course, also can choose a straight line and sine curve. Using single-chip microcomputer PLC, probably end can be deceleration control. About the different load and different speed, the warp and woof of demand to choose suitable frequency and jump frequency, can achieve the best control effect. Exponential curve, in software programming, good first time constant of storage in a computer memory, while working to choose. End, stepper motor, deceleration time for more than 300 ms. Electrical engineer also advocates mountain club if using the deceleration time is too short, for the vast majority of the stepper motor, stepper motor of high speed end will be difficult to rotate. the main products: stepper motor, brushless motor, servo motor, stepping motor drive, brake motor, linear motor and other kinds of models of the stepper motor, welcome to inquire. Telephone:
