Introduction of Linear Stepper Motor

time:2019-06-11 Browse:

   Linear stepper motors are used extensively for many high precision requirements, including manufacturing, precision calibration, precision fluid measurement, and precision positioning motion.

    Linear stepper motor terminology

  Positioning or residual torque:

  When no current is passed through the winding, the output of the motor can be rotated to the required torque.
 

  Dynamic torque:

  The torque produced by the motor at a certain step rate. Dynamic torque can be expressed as PULL IN torque or PULL OUT torque.
 

Introduction of Linear Stepper Motor

  Maintain torque:

  When the winding is in steady state DC, it can rotate the motor to the required torque on the output shaft.
 

  Inertia:

  Inertial measurement of acceleration or deceleration of an object. This is used to indicate the inertia of the load moved by the motor or the inertia of the rotor of the motor.

  Linear step increment (or step size):

  Linear displacement produced by the lead screw per revolution.
 

  The highest temperature rise:

  The designed motor allows for an increase in temperature. When the motor is energized, the temperature rise of the motor is inherent to an increase in the temperature loss of the electrical energy. Power loss mainly includes resistance heating (copper loss), iron loss and friction loss. The temperature of the motor is the sum of the total loss heating temperature and the ambient temperature.
 

  Pulse:

  The number of pulses (PPS) applied to the motor windings per second. The pulse rate is equal to the motor step rate.

  Pulses per second (PPS):

  The number of steps the motor produces in one second (sometimes called "steps/seconds"). This is determined by the frequency of the pulses generated by the motor drive.
 

  Boost speed:

  A drive technique that increases a given load from the original low step rate to a maximum without sacrificing the motor and then reducing to the original rate.
 

  Single step response:

  The time it takes for the motor to perform a full step.
 

    Stepping:

  The angle at which the rotor rotates each time the motor receives a pulse. For linear motors, this step is a linear distance.
 

    Step angle:

  The rotation produced by each step of the rotor is measured in degrees.
 

    Weekly steps:

  The total number of steps required for the rotor to rotate 360°. The sum of the resistance torque and the moment of inertia.
 

    Torque:

  The sum of the resistance torque and the moment of inertia.
 

    Pull out the torque:

  The maximum torque that the motor produces at a constant speed. Because the speed is constant, there is no moment of inertia. The kinetic energy and inertial load in the rotor during the circumference increases the pulling moment.
 

    Pull in (pull) torque:

  The acceleration torque of the rotor inertia must be overcome, as well as the external connections and various frictional torques that are fixedly connected during acceleration. Therefore, the traction torque is usually less than the traction torque.
 

  Torque inertia ratio:

  Linear Stepping Motor Introduction The basic principle of linear stepping motor: using screws and nuts to engage, take some measures to prevent the nut from rotating relative to the axis. In general, there are currently two ways to implement this conversion. The first is to install an internally threaded rotor in the motor, the internal thread of the rotor meshes with the screw for linear motion, and the second is a screw. The motor shaft moves linearly outside the motor by external drive nuts and screws. The result is a greatly simplified design that enables linear stepper motors to achieve precise linear motion without the need for external mechanical connections in many applications.

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