The dual motor drives the total mass of 30KG for 2 meters per minute and requires more strides into the motor. The single motor drives the total mass of 8KG for 20 meters per minute or so, and requires more strides into the motor. The precision requirement is not high, the motor is directly connected with the gear and rack, and the silk stalk is not considered.
57 stepper motor according to the length of the fuselage is not the same, not the same current, static torque from zero to two nm are few, from the power perspective, using 2 nm above 57 motor, friction control is good, the two scheme can be realized, the first scheme reliability is much higher. 30*9.8*2/60=9.8W; 8*9.8*20/60=26W motor power estimation: 2*2*3.14*150/60=31.4W. Gear size (motor speed, you want to reach the speed) to choose the right, the election of small speed can not reach, the election of the big lost step.
Stepper motor is an induction motor, its working principle is the use of electronic circuit, the DC power supply variable components, multi-phase timing control current this current stepper motor power supply, stepper motor can work normally, the power supply for the stepper motor driver is divided into the multi phase sequence controller.Although the stepper motor has been widely used, but stepper motors can not be like ordinary DC motors, AC motors in the regular use. It must be composed of double ring pulse signal, power drive circuit and so on, and the control system can be used. Therefore, it is not easy to make good use of stepping motor. It involves many specialized knowledge, such as mechanical, electrical, electronic and computer. Stepping motor, as an actuator, is one of the key products of mechatronics. It is widely used in various automatic control systems. With the development of micro electronics and computer technology, the requirement of stepping motor is increasing day by day, and it is applied in every national economic field
The stepping motor is an open loop control element which transforms the electric pulse signal into angular displacement or linear displacement. In the case of non overloaded, the motor speed and stop position depends only on the pulse frequency and pulse number, regardless of load changes, when the stepper driver receives a pulse signal, it drives stepper motor to set the direction of rotation of a fixed angle, called "step", it is the rotation of the fixed point of the operation step by step. Number of pulses can be controlled by controlling the angular displacement, so as to achieve the purpose of accurate positioning; at the same time by controlling the pulse frequency to control the motor rotation speed and acceleration, so as to achieve the purpose of speed.
