步进电动机

Stepper motorConvert electrical pulse signal into angular displacement of the stepping motor to control the micro &special motor rotors. As actuators in the automatic control device. For each pulse signal input, further before stepping motors, also known as the pulse motor. Stepper motor used in digital computer peripheral equipment, as well as the printer, plotter, and disk device.Stepper motor is the electrical pulse signal into angular displacement or line open loop control elements of displacement. In the case of the overload, motor speed, stop position depends only on the pulse signal frequency and pulse number, and not affected by load change, which give the motor a pulse signal, a step from the Angle of motor is turning. This line sexual relations, and the error of the stepper motor only periodic without cumulative error, etc. Made in the field of speed and position control with stepper motor to control becomes very simple. Although the stepper motor has been widely used, but stepping motor does not like ordinary dc motor, ac motor under normal use. It must be driven by double annular pulse signal and power circuit of control system can use. So good with step motor is not easy, it involves the mechanical, electrical, electronic and computer and many other professional knowledge. Today, the manufacturer of stepper motor is indeed many, but has the professional and technical personnel, can be developed, developed at the factory are very few, most manufacturers only a, 20 people, even the most basic equipment. Only in a stage of blind imitation. This gives households in product selection, use lots of trouble.Stepping motor driving power source by frequency pulse signal generator, pulse distributor and pulse amplifier, thus provide pulse current drive power supply to the motor windings. The performance of the stepper motor depends on the good cooperation between the motor and drive power supply.Stepper motor is no cumulative error, the advantages of simple structure, convenient operation and maintenance, low manufacturing cost, the ability of stepper motor to drive the load inertia is big, suitable for small and medium-sized machine speed and accuracy is not high, defect is low efficiency, fever, sometimes out of step. Stepper motor is widely used in the digital control system, such as d/a conversion device, numerical control machine tools, computer peripherals, recorder, clocks, such as in the industrial automation production lines, printing equipment, etc are used.Stepper motor is divided into electromechanical, magnetoelectric and linear three basic types.Electromechanical stepper motor consists of core, coil, gear mechanism, etc. Will produce magnetic solenoid coil electricity, promote its core panels, through a rotary Angle of the output shaft gear mechanism, rotating the gear 天行健，自强不息；地势坤，厚德载物。

1/5to keep the output axis of resistance in the new job position; Again electrify coil, a rotary Angle of rotation and, in turn to step into the work. Magnetoelectric stepper motor, its simple structure, high reliability, low price and wide application. Mainly include permanent magnet, the magnetic resistance type and hybrid.Permanent magnet stepper motor rotor magnetic pole of permanent magnet, polarity alternating magnetic field in air gap, the stator is composed of four phase winding. When A phase winding current, will shift to the phase winding rotor magnetic field direction of the identified. When A blackout, B phase winding is electricity field, produce A new magnetic field direction, at this point, the rotor is rotating Angle and is located in A new direction of the magnetic field, is determined by the order of excitation in the rotor rotation direction. If the change of the stator excitation too fast, the rotor will not consistent with the change of the stator magnetic field direction, the rotor is out of step. Start frequency and low frequency, and it is a disadvantage of the permanent magnet stepper motor. But permanent magnet stepper motor smaller power consumption, high efficiency. Appeared in the early 1980 s, the rotor is a permanent magnet disc disc stepper motor, the interval Angle and working frequency of magnetic resistance type stepping motor.Magnetic resistance of the stepper motor, the rotor iron core of the internal and external surface is equipped with distribution according to certain rule similar tooth groove, using the groove, the rotor iron core causes the change of the magnetic circuit magnetic resistance, the relative position to produce torque. The rotor iron core made of silicon steel sheet or soft magnetic materials, when one of the stator is excitation, the rotor will go to make the position of the magnetic circuit reluctance minimum. When another phase excitation, the rotor to another location, hours and magnetic circuit magnetic resistance for most motor will stop running. At this time, the rotor turns a step away from the Angle of theta b, namely type of N as the rotor turns a pitch run number; ZR for rotor teeth.Magnetic resistance type stepping motor structure form is more. Stator core has a single conductor, multiple stages; Has the radial, axial magnetic circuit; Winding phase number of three-phase, four, five. Magnetic resistance type stepper motor step Angle can do 1 ° ~ 15 °, and even smaller, easy to guarantee accuracy, starting and running frequency is higher, but large power consumption and low efficiency.Hybrid stepping motor, and its set, the structure of the rotor iron core and magnetic resistance type stepping motor is similar. With permanent magnet rotor single polarity in the air gap magnetic field, the magnetic field was also on the rotor alveolar modulation soft magnetic materials.Hybrid stepping motor and permanent magnet stepping motor with the 天行健，自强不息；地势坤，厚德载物。