Stepper motor speed is achieved by adjusting the pulse width or the number of pulses
Stepper motor is a kind of induction motor, its working principle is the use of electronic circuit, direct current (dc) into time-sharing power supply, multiphase sequential control current, in this current for stepper motor power supply, step motor to work properly, is time-sharing power supply for step motor drive, multiphase timing controller. Although the stepping motor has been widely used, the step motor is not used as a normal dc motor and ac motor is used regularly. It must be used by the control system such as double ring pulse signal and power drive circuit. Therefore, it is not easy to use a good step motor, which involves a lot of specialized knowledge, such as machinery, electrical machinery, electronics and computers. Stepping motor is one of the key products of mechanical and electrical integration, and is widely used in various automatic control systems. With the development of microelectronics and computer technology, the demand for stepping motors is increasing, and there are applications in the national economy.
Stepper motor speed is achieved by adjusting the number of pulses, and the number of steps to step into the motor is the number of pulses, not the pulse width. The other thing to note is that the pulse frequency should not exceed the pulse frequency and the frequency of the motor response. The step motor is an open loop controlling element which converts the electrical pulse signal into angular displacement or line displacement. In the case of the overload, motor speed, stop position depends only on the pulse signal frequency and pulse number, and not affected by load change, when the stepper driver receives a pulse signal, it is driving a stepper motor according to set the direction of a fixed Angle, known as the "step Angle", its rotation is based on the Angle of the fixed step by step. It can control the amount of angular displacement by controlling the number of pulses, so as to achieve accurate positioning. At the same time, the speed and acceleration of the motor can be controlled by controlling the pulse frequency to achieve the goal of speed adjustment.
Is the frequency! By the frequency generator, the PWM modulation operation is assigned to the axes (the partial motor), The frequency is basically fixed, non-linear composite motion, different axial pulse width. The number of pulses is the amount of the rotor, also called the step number, and each motor has a fixed (Angle/step) number. When the non-linear compound motion, the calculating axis frequency and the width of the pulse are fixed (relative, the linear cutting is affected by the processing current), and the other axis is changed by the change of the fixed quantity!
It is the step of the drive that drives the pulse to drive the step into the motor, the faster the pulse frequency, the number of pulses is the number of steps in the case of not losing a step. Driver receives the pulse signal to use PWM pulse width modulation to control the power electronic components (such as thyristor) to control the shut off to get the required power model to drive the motor. It seems like this, wait for the expert to answer ~ ~ PWM is how to what effect
Motor speed regulation is now PWM modulation, PWM modulation is also known as pulse width modulation, which is the frequency of changing the output signal.
