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Type 57 stepper motor adjusting _ encoder stepper motor load

by:Zhenyu     2020-09-17
The number of phase step motor: refers to the inside of the motor coil set number, at present there are two phase, three-phase, four commonly used phase, five phase stepper motor. Step motor phase number is different, the pitch Angle is different, the general step of the two-phase motor from the Angle of 0. 9° / 1. 8° , the three-phase to 0. 75° / 1. 5° And five phase is zero. 36° / 0. 72° 。



keep torque: refers to the stepper motor power but no turns, locked rotor torque of the stator. It is one of the most important parameters of step motor, stepping motor at low speed torque close holding torque.



phase: create an extremely different N, S magnetic field coil logarithm, refers to the inside of the planetary gear motor coil set number, at present there are two phase, three-phase, four commonly used phase, five phase stepper motor. Step motor phase number is different, the pitch Angle is different, the general step of the two-phase motor from the Angle of 0. 9° / 1. 8° , the three-phase to 0. 75° / 1. 5° And five phase is zero. 36° / 0. 72° 。 When no subdivision driver, user mainly by select the number of different phase stepping motor to meet the requirements of his step Angle. If it USES subdivision driver & lsquo; Phase number & rsquo; Will become meaningless, users only need to change the fine fraction on drives, can change interval Angle. Currently the most widely used is two and four phase, four phase motor generally used as a two phase, the high cost of five phase.



take count: the number needed to complete the periodic changes in a magnetic field pulses or conducting state expressed with n, or refers to the motor turns a pitch Angle of the pulse number, four phase motor, for example, there are four phase AB - four operation modes BC - CD - DA- AB, four phase eight operation mode is A - AB- B - BC - C - CD - D - DA- 一个。



inherent interval Angle: corresponds to a pulse signal, motor rotor turning angular displacement with & theta; Said. θ = 360 degrees ( The rotor teeth number J * run beats) To conventional phase two, four, rotor teeth of 50 motor as an example. Four run time interval Angle for & theta; = 360 degrees/( 50 * 4) = 1. 8 degrees ( Commonly known as the whole step) , eight runtime interval Angle for & theta; = 360 degrees/( 50 * 8) = 0. 9 degrees ( Commonly known as half step) 。 Where the step Angle can call & lsquo; Step motor inherent elongation & rsquo; The practical work, it is not necessarily the motor when the real interval of Angle, the real interval Angle and drive on.



positioning torque ( 启动转矩) : in the condition of no electricity, motor rotor's own locking torque ( Caused by the tooth harmonic magnetic field and mechanical error) And DETENT TORQUE at home there is no uniform way of translation, to make you misunderstanding; As a result of the reactive stepping motor rotor is not a permanent magnetic material, so it does not DETENT TORQUE.



the maximum static torque: also called holding torque ( 保持转矩) , the motor in the rated under the action of static electricity, Electricity) Does not make the rotary motion of the, motor, motor rotor locking torque, stator locked rotor torque. This moment is to measure motor volume ( Geometric size) The standard, has nothing to do with the drive voltage and drive power supply, etc. Usually stepper motor at low speed torque close to holding torque. As a result of the stepper motor output torque along with the increase of speed and continuous attenuation, the output power also along with the increase of speed change, so keep the torque has become a measure of stepper planetary gear motor is one of the most important parameters. For example, when people say 2 n. M of stepper motor, in the absence of special instructions refers to holding torque is 2 n. M the stepper motor.



although static torque is proportional to the electromagnetic excitation ampere turn, with the air gap between the rotor teeth, but excessive use reduced the air gap, increase the excitation ampere turns to improve the static torque is not desirable, it will cause heating of the motor and the mechanical noise.



the maximum static moment of choice:



the dynamic torque stepper motor a while it is difficult to determine, we tend to make sure the static torque of motor. Static moment of choice was based on motor work load, the load can be divided into two kinds of inertia load and friction load. Single inertial load, and there is no single friction load. Direct starting ( Generally by the low speed) When two kinds of load are to consider, when accelerating starting main consideration of inertia load, constant speed run into as long as considering the friction load. In general, static moment should be 2 - friction load Good within 3 times, once selected, static torque motor frame and length can be set down, Geometric size) 。


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