英语论文网

d production of CNC machine tools and other CNC equipment to promote , and by that time the Japanese CNC system effects , reluctance stepping motor began to develop a series of products to the stator 6 -pole, three-phase magnetic rotor 40 teeth resistance motor based, there stators 10 pole rotor 100 teeth five phase reluctance motor and four -phase motors. 1980s began to develop hybrid stepping motor , the stator 8 pole rotor 50 teeth two -phase ( four -phase ) hybrid stepper motor based. 1987 began to design pole stator 10 and rotor 50 teeth five -phase hybrid stepping motor , and also developed a number of different foreign atypical products, such as 8-pole stators , rotors 60 teeth of two -phase ( four -phase ) mixed stepper motors. This is to the reluctance stepping motor step angle is consistent . Rotor 200 teeth five -phase hybrid stepping motor , the rotor 100 teeth nine phase ( phase ) hybrid stepping motor , the main features are high resolution and variable step angle .

After years of development, China stepper motor to form a many varieties and specifications of the situation shown in Figure 1 .

The most important product lines , one in the 1970s formed reluctance stepping motor products in the low-end applications is still more of the market, continue to produce ; second is a series hybrid stepper motor products, including the introduction of technology and production equipment, in accordance with the design and production of two foreign -phase and five -phase hybrid stepping motor , as well as its own domestic development and production of hybrid stepping motor , still have their different fields of application , the short term is difficult to unify to several qualified specifications varieties . Stepper motor decades of development experience, reluctance for smooth operation and speed is greater than 1 000 r / min purposes ; permanent magnet low cost, mainly used in inexpensive consumer products ; Permanent Magnet Induction more suitable for low speed and high torque applications.

This was undoubtedly the most promising hybrid stepping motor , while the hybrid motor ED also the following four directions:

   One trend is to continue along the direction of miniaturization . With the motor itself and a variety of application areas to broaden the continuous miniaturization machine , requiring ancillary motor must also be getting smaller and smaller , in 57,42 frame size motor applications for many years now after its frame size extending downward to 39,35,30,25 . Switzerland ESCAP has also recently developed a diameter of only 10mm stepper motors.

The second trend is the change round a square motor motors. Since the motor using rectangular structure, making it possible to design the rotor than large round , and thus its volume ratio of torque will be greatly improved. The same frame size of the motor torque than the circular square will increase by 30 % to 40% .
The three trends , integrated design of the motor . That is, the rotor position sensor , gear reducer and motor body integrated design together, so that it can easily form a closed loop system , which has more superior control performance.

Trends of four to five and three-phase motor direction. The widely used two -phase and four -phase motor , the vibration and noise is large, while the five -phase and three-phase motor wi本论文由英语论文网提供整理，提供论文代写，英语论文代写，代写论文，代写英语论文，代写留学生论文，代写英文论文，留学生论文代写相关核心关键词搜索。