【正文】 d synchronous motor. A fourphase motor can be used for fourphase operation, it can be used for twophase operation. (Must be bipolar voltage drive), and reactiontype motor can not be the case. For example: four phase, eightphase operation (AABBBCCCDDDAA) can use twophase eightshot operation mode. Is not difficult to find the conditions for C =, D =. 1 Twophase motor windings and the fourphase motor internal consistent, lowpower motor directly connected to the second phase generally, and larger motor power, for the convenience of use, flexibility to change the motor39。s dynamic characteristics, often to the external wiring for the 8lead (d phase), such use can not only make use of fourphase motors, can be used for twophase motor winding in series or parallel connection. 2, classification Induction Motor with Phase can be divided into: twophase motor, three phase motor, fourphase motor, fivephase motor. To Frame (motor diameter) can be divided into: 42BYG (BYG stepper motor for the Induction code), 57BYG, 86BYG, 110BYG, (international standard), but as 70BYG, 90BYG, 130BYG so are domestic standards. Some of the basic parameters of stepper motor Natural step angle motor Control system that made it one step per pulse, the motor rotation angle. Motor factory, a step angle is given a value, such as 86BYG250A type motor gives the value of 176。 / 176。 (halfstep work that was 176。, when the whole work step 176。), the step angle can be called 39。natural step angle motor39。, it is not necessarily true when the actual work motor step angle, the real step angle and drive about. Phase Stepping 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 is 176。 / 176。, threephase for the 176。 / 176。, 5 phase was 176。 / 176。. In the absence of subdrive, the user select a different phase mainly by the number of stepper motor step angle to meet their requirements. If you use the subdrive, then 39。Phase39。 will bee meaningless, users simply change the drive number of segments, you can change the step angle. Holding Torque (HOLDING TORQUE) Refers to the stepper motor power but not rotated, the stator locked rotor torque. It is the stepper motor one of the most important parameters, usually stepper motor torque at low speeds close to maintain the torque. As the stepper motor39。s output torque increases with the constant decay rate, the output power also increases with the speed of change, it bees a measure to maintain torque stepper motor one of the most important parameters. For example, when people say the stepper motor in case of no special note is to keep the stepper motor torque . DETENT TORQUE: Stepper motor power is not the case, the stator locked rotor torque. DETENT TORQUE translation in China there is no uniform way, easy to misunderstand us。 In response to the step motor39。s rotor is not a permanent magnet, so it does not DETENT TORQUE. Characteristics of stepper motor 1. General stepper motor step angle accuracy of 35%, and not cumulative. 2. Stepper motor allows the maximum surface temperature. Stepper motor temperature is too high the first magnetic motor will demagnetization, leading even torque step down, so the maximum motor surface temperature should be allowed depending on motor demagnetization of magnetic material points。 Generally speaking, the magnetic material of the demagnetization points are above 130 degrees Celsius, some even as high as 200 degrees Celsius, so stepping motor outside temperature 8090 degrees Celsius pletely normal. 3. Stepper motor torque will increase with the speed of decline. When the stepper motor rotation, 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 the frequency (or speed) with the increase of current decreases, resulting in decreased torque. 4. Lowspeed stepper motor can operate normally, but higher than a certain speed can not start, acpanied by howling. Stepper motor has a technical parameters: Noload starting frequency, ie stepper motor in case of the normal boot load pulse frequency, pulse frequency is higher than the value if the motor does not start, possible lost step or block transfer. In the case of a load, start frequency should be lower. If you want to achieve highspeed rotation motor, pulse frequency should speed up the process, which started less frequently, and then by a certain acceleration to rise to the desired frequency (motor speed from low rise to highspeed). Stepper motor with its significant features in the era of digital manufacturing plays important purposes. With a different digital technology development and technology to improve its own stepper motor, stepper motor will be applied in more areas. Stepper motor Tips 1. What is a stepper motor? Stepper motor is an electrical pulse into the angular displacement of the implementing agencies. Popular talk a little: When receiving a stepper drive pulse signal, it drives the direction of stepping motor rotation by setting a fixed angle (and step angle). You can control the pulse number to control the amount of angular displacement, so as to achieve accurate positioning purposes。 the same time you can control the pulse frequency to control the motor rotation speed and acceleration, so as to achieve speed control purposes. 2. What kinds of stepper motor points? Stepper motor divided three ways: permanent magnet (PM), reactive (VR) and mixed (HB) permanent magnet stepper usually twophase, torque and smaller, usually degree step angle or 15 degrees。 reaction is generally threephase stepper can achieve high torque output, step angle of degrees is generally, but the noise and vibration are significant. In Eu