杨建丽
English
Stepper motor
Stepper motor is the electric pul signals into angular displacement or linear displacement of the open-loop stepper motor control element pieces. In the ca of non-overloaded, the motor speed, stop position depends only on the pul frequency and pul number, regardless of load changes, when the driver receives a step pul signal, it will drive a stepper motor to Set the direction of rotation of a fixed angle, called the "step angle", which the angle of rotation is fixed step by step operation. Number of puls can be controlled by controlling the angular displacement, so as to achieve accurate positioning purpos; the same time by controlling the pul frequency to control the motor rotation speed and acceleration, to achieve speed control purpos.
Work
Induction motor is a stepper motor, does it work is the u of electronic circuits, the DC power supply into a time-sharing, multi-pha timing control current, this current stepper motor power supply, the stepper motor to work properly , The drive is sharing power supply for the stepper motor, the polypha timing controller
Although the stepper motor has been widely ud, but the stepper motor does not like a normal DC motor, AC motor in the conventional u. It must be double-ring pul signal, power driver circuit compod of the control system can be ud. Therefore, it is not easy with a good stepping motor, which involves mechanical, electrical, electronics and computers, and many other specialized knowledge.
As the stepper motor actuators, electromechanical integration, one of the key products, widely ud in a variety of automatic control systems. With the development of microelectronics and computer technology, increasing demand for stepper motor, has applications in all areas of the national economy.
Categories
Now more commonly ud include the reaction of step motor stepper motor (VR), permanent magnet stepper motor (PM), hybrid stepper motors (HB) and single-pha stepper motor.
Permanent magnet stepper motor
Permanent magnet stepper motor is generally two-pha, torque, and smaller, usually 7.5 degree step angle or 15 degrees;
Permanent magnet stepper motor output torque, dynamic performance, but a large step angle.
Reaction Stepper Motor
Reaction is generally three-pha stepping motor can achieve high torque output, step angle of 1.5 degrees is generally, but the noi and vibration are large. Reaction by the stepper motor rotor magnetic circuit made of soft magnetic materials, a number of the stator pha excitation winding, the u of permeability changes in torque. Step Motor simple structure, low production costs, step angle is small; but the dynamic performance is poor.
Hybrid Stepping Motor
Hybrid Step Motor combines reactive, permanent magnet stepper motors of both, it's a small step angle, contribute a large, dynamic performance, is currently the highest performance stepper motor. It is also sometimes referred to as Permanent Magnet Induction Stepping Motor. It consists of two phas and the five-pha: the general two-pha step angle of 1.8 degrees and the general five-pha step angle 0.72 degrees. The most widely ud Stepper Motor.
Stepper motor drive for energy saving
Three-pha stepper motor drive special features:外国小游戏
■ 180% low torque output, low frequency characteristics of a good run
■ Maximum output frequency 600Hz, high-speed motor control
■full range of detection of protection (over voltage, under voltage, overload) instantaneous power failure restart
■ acceleration, deceleration, such as dynamic change in the stall protection function to prevent
■ Electrical dynamic parameters of automatic recognition function to ensure stability and accuracy of the system
■ quick respon and high-speed shutdown
■ abundant and flexible input and output interface and control, versatility
孟子尽心上■u of SMT production and three full-mount anti-paint treatment process, product stability and high
■full range of Siemens IGBT power devices using the latest, to ensure the quality of high-quality
Basic principles
Usually for the permanent magnet rotor motor, when current flows through the stator
windings, the stator windings produce a magnetic field vector. The magnetic field will lead to a rotor angle of the magnetic field makes the direction of a rotor and the stator's magnetic field direction. When the stator magnetic field vector rotating at an angle. As the rotor magnetic field is also transferred from another perspective. An electrical pul for each input, the motor turning a point forward. It is the angular displacement of the output and input the number of puls proportional to speed and pul frequency is proportional to. Power to change the order of winding, the motor will rever. Therefore, the number of available control pul, frequency and power the motor windings of each pha in order to control the stepper motor rotation. Reaction Stepper Motor
2016属什么
画赵雷As the respon to stepping motor works is relatively simple. The following describes the first principle of three-pha stepping motor respon.
1, the structure: uniformly distributed rotor with many small teeth, the stator excitation windings of three teeth, the geometric axis of the rotor tooth axis in order were staggered. 0,1 / 3 て, 2 / 3 て, (adjacent to the two axes of the rotor tooth pitch distance between the てsaid), that is, with the teeth 儿童肠痉挛
a relatively homogeneous A, B and staggered tooth 2 to the right 1 / 3 て, C and the right to stagger tooth 3 2 / 3 て, A 'and the tooth 5 is relatively homogeneous, (A' is A, is the gear teeth 5 1) The following is the rotor's expansion plan:
2, rotation: If the A-pha power, B, C pha is not energized, the magnetic field, alignment of teeth 1 and A, (without any power of the rotor are the same the following). Such as the B-pha power, A, C pha is not energized, gear 2, and B should be aligned, when the rotor over to the right 1 / 3 て, this time offt teeth 3 and C 1 / 3 て, teeth 4 and A shift (て-1 / 3 te) = 2 / 3 て. Such as the C-pha power, A, B pha is not energized, gear 3, and C should be aligned, this time right off the rotor Y ouxiang 1 / 3 て, 4 and A gear shift time is 1 / 3 てalignment. Such as the A-pha power, B, C pha is not energized, 4 and A-aligned teeth, the rotor Y ouxiang right over 1 / 3 てso after A, B, C, A are energized, gear 4 (ie, the previous tooth 1 teeth) to the A-pha, rotor to the right around a pitch, if you continue to press the A, B, C, A ... ... power, the motor for each step (per pul) 1 / 3 て, Rotate Right. Such as by A, C, B, A ... ... power, the motor to rever. This shows that: the location and speed of motor conduction times by the (number of puls) and frequency into one relationship. The direction determined by the conductivity of the order. However, out of torque, smooth, noi and reduce the angle considerations. Often with A-AB-B-BC-C-CA-A this conductive state, so that each s
tep the original 1 / 3 てchanged to 1 / 6 て. Even through different combinations of two-pha current, so 1 /
3 てinto 1 / 12 て, 1 / 24, te, which is the basic theory of the motor-driven basis for subdivision. Easily introduced: m pha on the stator excitation windings, the axis of the rotor tooth axis were offt 1 / m, 2 / m ... ... (m-1) / m, 1. And conductivity at a certain pha quence reversing motor can be controlled - this is the rotation of the physical conditions. As long as we meet this condition can theoretically create any pha stepper motor, becau of cost, and many other considerations, the market generally two, three, four, five-pha is more.
3, the torque: the motor once energized, will produce between the stator and rotor magnetic field (magnetic flux Ф) when the rotor and stator stagger angle to produce force F and (dФ / dθ) is proportional to S the magnetic flux Ф = Br * S Br for the flux density, F and S for the magnetic area of L * D * Br core is proportional to L, effective length, D is rotor diameter Br = N • I / RN • I was excited winding ampere turns (current x turns) R for the magnetic resistance. Torque = force * radius of the torque and the motor turns the effective volume * An * is proportional to the flux density (only consider the linear state), therefore, the greater the effective volume of the motor, the greater the excitation ampere turns, the smaller air gap between stator and rotor, the motor torque, and vice ver
sa.
Induction Stepping Motor
1, features: Induction, compared with the traditional reactive, structural reinforced with a permanent magnet rotor, in order to provide the working point of soft magnetic materials, and the stator excitation magnetic field changes only need to provide to provide the operating point of the consumption of magnetic materials energy, so the motor efficiency, current, low heat. Due to the prence of permanent magnets, the motor has a strong EMF, the damping effect of its own good, it is relatively stable during operation, low noi, low frequency vibration. Induction can be en as somewhat low-speed synchronous motor. A four-pha motor can be ud for four-pha operation, but also can be ud for two-pha operation. (Must be bipolar voltage drive), while the motor is not so reactive. For example: four pha, eight-pha operation (A-AB-B-BC-C-CD-D-DA-A) can u two-pha eight-shot run. Not difficult to find the conditions for C =, D =. a two-pha motor's internal winding consistent with the four-pha motors, small power motors are generally directly connected to the cond pha, the power of larger motor, in order to facilitate the u and flexible to change the dynamic characteristics of the motor, its external connections often lead to eight (four-pha), so that when ud either as a four-pha motors ud, can be ud for two-pha motor winding in ri
es or parallel.
2, classification
Induction motors can be divided in phas: two-pha motor, three pha motor, four-pha motor, five-pha motor. The frame size (motor diameter) can be divided into: 42BYG (BYG the Induction Stepping motor code), 57BYG, 86BYG, 110BYG, (international standard), and like 70BYG, 90BYG, 130BYG and so are the national standards.
3, the stepper motor pha number of static indicators of terms: very differently on the N, S the number of magnetic field excitation coil. Common m said. Beat number: complete the necessary cyclical changes in a magnetic field puls or conducting state with n said, or that turned a pitch angle of the motor puls needed to four-pha motor, for example, a four-pha four-shot operation mode that AB -BC-CD-DA-AB, shot eight four-pha operation mode that A-AB-B-BC-C-CD-D-DA-A. Step angle: corresponds to a pul signal, the angular displacement of the rotor turned with θ said. θ = 360 degrees (the rotor teeth number of J * run shot), the conventional two, four-pha, the rotor teeth 50 tooth motor as an example. Four step run-time step angle θ = 360 ° / (50 * 4) = 1.8 degrees (commonly called the whole step), eight-shot running step angle θ = 360 ° / (50 * 8) = 0.9 degrees (c
ommonly known as half step.) Location torque: the motor is not energized in the state, its locked rotor torque (as well as by the magnetic field profile of harmonics caud by mechanical error) static torque: the motor under the rated static electricity, the motor without rotation, the motor shaft locking torque. The motor torque is a measure of volume (geometry) standards, and drive voltage and drive power, etc. has nothing to do. Although the static torque is proportional to the electromagnetic magnetizing ampere turns, and fixed air gap between the rotor teeth on, but over-u of reduced air gap, increa the excitation ampere-turns to increa the static torque is not desirable, this will cau the motor heating and mechanical noi.
挂烫机怎么选
4, the dynamic indicators and terminology:
灵峰探梅1, step angle accuracy: turn a stepper motor step angle for each actual value with the theoretical value of the error. Expresd as a percentage: Error / Step Angle * 100%. Its value is the number of different running different beat, four beat running should be within 5%, eight runs should take less than 15%.
2 step: the motor running operation steps, is not equal to the theoretical number of steps. Called the step.
3, offt angle: the axis of the rotor tooth offt angle of the axis of the stator teeth, the motor is running there will be misalignment angle, the error caud by the
