How do you calculate the inertia and torque on the output shaft of the motor
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. 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.
The moment of inertia and torque calculated on the output shaft of the motor is calculated by the torque = force * force arm, which is a circle of 5cm long, which can be a radius of 0.8 cm. Torque = 20 * 0.8 = 16kg. Cm. How fast the weight is required to convert to the unit RPM (RPM) Now the important parameters of the motor are available, and you can simply find the step of the 16kg. Cm moment when you ask for it. It is best to multiply by a safety factor of 1.2, and the output torque is required to reach about 20kg. Cm.
The inertia of the step motor is usually associated with the starting frequency. In general, the higher the inertia of the start and stop frequency, the suggestion is to use the low inertia motor or the lower drive current, the voltage. If the object of a rectangular cube is flat, the surface of contact is large, and the force of friction is greater. Friction is the ability to overcome inertia. The force of friction is usually greater than the inertia of the step motor.
The rotational inertia of the stepper motor and torque are fixed parameters, different electric opportunity have different moment of inertia and torque, the motor is not calculated made when one of the biggest parameters. You can only choose a matching machine based on the inertia and torque of your load. The moment of inertia is a square centimeter, so let's do it ourselves. Load torque and transmission parts have considerable relationships.
Every move slowly into the motor drive moment of inertia, mostly manufacturer tests, because there were some fuzzy parameters, the calculation of inertia force and the biggest difference is that moment of inertia is a set of quality area, torque is set the length of the unit quality. The formula is: the moment of inertia equals the mass of the object. The inertia of the step motor is produced by the rotor, so it is important to calculate the rotor weight of the step motor.
