【導讀】步進電機是將電脈沖信號轉(zhuǎn)變?yōu)榻俏灰苹蚓€位移的開環(huán)控制元步進電機件。在非超載的情況下，電機的轉(zhuǎn)速、停止的位置只取決于脈沖信號的頻率和脈沖數(shù)，可以通過控制脈沖個數(shù)來控制角位移量，從而達到準確定位的目。它必須由雙環(huán)形脈沖信號、功率驅(qū)動電路等組成控制系統(tǒng)方。因此用好步進電機卻非易事，它涉及到機械、電機、電子及計算機等許。動化控制系統(tǒng)中。隨著微電子和計算機技術(shù)的發(fā)展，步進電機的需求量與日俱增，在各個國民經(jīng)濟領(lǐng)域都有應用。永磁式步進電動機輸出力矩大，動態(tài)性能好，但步距角大。反應式步進電機的轉(zhuǎn)子磁路由軟磁材料制成，定子上有多相。反應式步進電動機結(jié)構(gòu)簡單，生產(chǎn)成本低，步距角小；但動態(tài)性能差。角小，出力大，動態(tài)性能好，是目前性能最高的步進電動機。這種步進電機的應用最為廣泛。控制脈沖數(shù)量、頻率及電動機各相繞組的通電順序來控制步進電機的轉(zhuǎn)動。用時，既可以作四相電機使用，可以作二相電機繞組串聯(lián)或并聯(lián)使用。

　　

【正文】 nductor high current motor. 7, the resonance point of the motor: stepping motor has a fixed resonance region, two, fourphase Induction in the resonance region is generally between 180250pps ( degree step angle) or about the 400pps (step angle degrees), the higher the motor drive voltage, motor current increases, the lighter the load, the smaller the size the motor, the resonance shift upward, and vice versa, the motor output torque is large, yet further, and the whole system noise reduction, the general operating point should be offset more resonance. 8, motor reversing control: timing is energized when the motor windings ABBCCDDA or () is a positive turn, power the timing for the DACDBCAB or () when reversed. Some of the basic parameters of the stepper motor Natural step angle motor It said each of the control system sends a pulse signal, the motor rotation angle. Motor factory, a step angle is given a value, such as 86BYG250A motors is given in 176。 / 176。 (halfstep work that is 176。, when the work of the whole step 176。), the step angle can be called 39。natural step angle motor39。, which is not necessarily true when the actual work the motor step angle, the real step angle and drive on. Stepper motor step angle is usually the general puting β calculated as follows. β = 360 176。 / (Z ? m ? K) Where βstepper motor step angle。 Zrotor teeth。 mphase stepper motor number。 Kcontrol factor, the film is the ratio of the number of coefficients with the phase number Phase stepper motor Refers to the number of the motor coil group, the monly used twophase, three phase, fourphase, fivephase stepper motor. Different number of motor phases, the step angle is different, the general twophase motor step angle of 176。 / 176。, threephase for the 176。 / 176。, fivephase for the 176。 / 176。. In the absence of subdrive, the user select a different number of phases depends mainly on the stepper motor step angle to meet their own requirements. If you use the subdrive, the 39。phases39。 will bee meaningless, the user simply changes in the subdivision number on the drive, you can change the step angle. Holding torque (HOLDING TORQUE) Stepper motor is energized but no rotation, the stator locked rotor torque. It is the stepper motor one of the most important parameters, usually when the stepper motor torque at low speed near the holding torque. As the stepper motor39。s output torque increases with the speed and continuous attenuation, output power increases with the speed change, so keep the torque stepper motor to bee a measure of one of the most important parameters. For example, when people say the stepper motor in case of no special note is the holding torque of the stepper motor for the . DETENT TORQUE: Stepper motor is not energized, the stator locked rotor torque. DETENT TORQUE translation in the country there is no uniform way, easy to misunderstand us。 the reaction is not a permanent mag stepper motor rotor material, so it does not DETENT TORQUE. Characteristics of the stepper motor 1. The general accuracy of the stepper motor step angle of 35%, and not cumulative. 2. Appearance of the stepper motor to allow the maximum temperature. Stepper motor causes the motor temperature is too high the first magic demagization, resulting in loss of torque down even further, so the motor surface temperature should be the maximum allowed depending on the motor demagization of magic material points。 Generally speaking, the magic demagization points are above 130 degrees Celsius, and some even as high as 200 degrees Celsius, so the stepper motor surface temperature of 8090 degrees Celsius is normal. 3. Stepper motor torque will decrease with the increase of speed. When the stepper motor rotates, the motor winding inductance of each phase will form a reverse electromotive force。 the higher the frequency the greater the back emf. In its role, the motor with frequency (or speed) increases with the phase current decreases, resulting in decreased torque. 4. Lowspeed stepper motor can operate normally, but if not higher than a certain speed to start, acpanied by howling. Stepper motor has a technical parameters: noload starting frequency, ie the stepper motor with no load to start the normal pulse frequency, pulse frequency is higher than the value if the motor does not start, you may lose steps or stall occurs. In the case of a load, start frequency should be lower. If you want the motor to achieve highspeed rotation, the pulse frequency should speed up the process, which started lower frequency, and then rise by a certain acceleration of the desired frequency (motor speed from low rise to highspeed). Stepper motor with its significant features, in the era of digital manufacturing play an important purpose. Along with the different development of digital technology and the stepper motor itself, improvements in technology, the stepper motor will be applied in more fields.