The development trend of program-controlled exchange technology and trends

 generator Stator Rotor 
Specifications
1. 20 years manufacturing experience 
2. competitive price,high quality 
3. Accessories Series: stator and rotor 
1. The development of new type special large scale integrated circuit, improve the level of integration and modular hardware, in order to further reduce the volume, reduce costs, enhance function and improve reliability. 2. Improve the decentralized control, flexibility and reliability of phase in distributed way. 3. Using CCITT (ITU) suggested a high-level language (e.g., CHILL, SDL, MML), improve electric fan motor the level of software and modularization. Enhance the development of support system, powerful software generation system is established. 4. Actively promote total signal system. 5. To phase in the business, such as data, fax, Telex (Telex) and intelligent Telex (Teletax), visual data (Videotex), figure on 220v electric motor the visual (Teletext) and E-mail (Electronic Mail), image information and so on, the acmotortrading.blogspot.com development of the corresponding interface, constitute a comprehensive information exchange system. 6. Strengthen the program-controlled exchange system and other types of communication network (such as fax net, packet-switched networks, or public data network, computer local area network (LAN) interface, connection and networking capability. 7. In order to adapt to high speed information business growing demand and the development of optical fiber communication, to carry out the broadband integrated services digital network (ISDN) - B environment exchange theory, system and key technology research. One of the highlights of the present study for asynchronous transfer mode of ATM.

Research on the positioning control of asynchronous motor - fuzzy controller

(1) to determine the fuzzy controller input variables and output variables (2) design control rules of fuzzy controller (3) establish the blurred with the fuzzy method (4) select the fuzzy controller input variable and output variable in the theory field and determine the parameters of the fuzzy controller (quantitative factor and scaling factor) (5) the preparation of the application of fuzzy control algorithm (6) the rational selection of sampling time fuzzy control algorithm electric vehicle motor Generally use a two-dimensional fuzzy controller to the change of the error and error as input variables, to control the change of the quantity of output. The design of the fuzzy control rules generally includes: choose the word set of input/output variables, define a fuzzy variable fuzzy subsets and establish the control rules of fuzzy controller. The word set input and output variables, as a general rule, be {NB, NM, NS, NO, PO, PS, PM, PB}. Fuzzy variables of the fuzzy subset is to determine the shape of membership function of fuzzy ac electric motor subset. 


General use normal distribution. Control rules available conditional statements describe, that is, If A and B, Then C, Then control rules table is established. Blur is the accurate quantity into fuzzy quantity, can use formula: Y = 12 X (a + b) / 2 / (b - a) accurate quantity is the actual range [a, b]. The output of the fuzzy control is a fuzzy quantity, it cannot directly control the controlled object, needs to be converted into precise volume. There are three methods: (1) selection of maximum membership degree method. The method is simple, less but the use of information; (2) take the median method; (3) the weighted average decision method, the use of information, but the large amount of calculation. Controller of the control algorithm can be written as if E = A (I) then EC = B (j) then U = C (ij) (I = 1, 2, 3,... m; j = 1, 2, 3,..., n) based on the sampling error, error change, can calculate the corresponding control quantity changes, to all the X, Y all the elements in the entire portfolio to calculate the corresponding control quantity change, U can be written as matrix (ij) (n * m) will be made table electricalmotor1.blogspot.com matrix, as A lookup table, to be stored in memory. After the real-time control, based on the fuzzy quantitative error value and error changes of look-up table directly, then set the scaling factor can be as the output to control the controlled object.

Anion generator

Anion generator through the anion generator using pulse, oscillation electrical dc negative high voltage, low voltage to use carbon brush tip dc high corona, high speed to release a large number of electronic (e -), and electron cannot is present in the air for a long time (electronic life exists only nS), will be immediately oxygen (O2) to catch in the air, www.dongfeng-motor.com thus forming motor electric a device of the negative ions. Simple anion generator, negative ion increased to hypnosis, stop sweat, analgesia, stomachic, refreshment, eliminate fatigue. Anion generator, 220 v ac mains after rectification to the C2 and C3 charging, charging when C2 to hydrogen bubble small diesel generator conduction and trigger SCR conduction, C3 SCR, B L1 fan cover discharge, after B induction booster, D2 reverse rectification by 8 kv dc make generator M high ionization and produce negative ions.

The application of squirrel-cage asynchronous motor soft starter - the traditional method for motor starting

Squirrel-cage motor direct total pressure of the large current when starting the motor stator coil and produce very big impact,rat cage bar damage caused squirrel-cage winding insulation and faults,cause 8500w gasoline generator motor failure; Large current will produce a lot of heat,winding insulation damage,reducing the life of the motor.Can be used to increase the power distribution capacity or limitation of motor starting current method to solve the above problems.If only increase the distribution capacity for starting motor,it is not economic.Therefore,usually equipped with limit starting device of generator generator set motor starting current.The commonly used methods are: 1) the stator cascade reactor or resistance starting.Stator reactance starting,reduces the starting current,but also reduces the starting voltage and starting torque is reduced more.Therefore,stator reactor step- down starting applies only to the electrical motor light load motor starting. 


2) ya a delta step-down starting.Ya a delta step-down starting is also applicable to the light load motor starting,and limited to the normal operation of delta connection of the motor.Louboutin leather plant low pressure air compressor motor is to use this way. 3) the autotransformer step-down starting.Using autotransformer step-down starting,compared with the direct starting,starting voltage reduced a lot (for the rated voltage of 1/4,1/7),and the starting torque to reduce more; And autotransformer is wholesalemotor.blogspot.com not allowed to frequent starting,which limits its wide use. 4) yanbian triangle step-down starting.Yanbian triangle is made after the starting of motor,tap can't change,limiting the application of yanbian triangle starting method.These belong to step decompression starter,start-up mode and obvious shortcomings,namely the secondary impact appeared in the process of starting current.