How to visually distinguish between ac and dc motor?

motor Lamination ac motor blender parts 
Specifications
1. Lamination of electric motor 
2. IP54 class F 
3. 100% copper 
4. silicon steel stamping 

5.stunning performance 
Look from the other end of the motor output shaft, a blade is ac motor, can see the commutator (or see 3 phase ac auto parts induction motor commutator and carbon brush dc motor. If told two motors as big power, small volume of ac motor. Generally it is. Don't look at brand dc and ac motor is to judge? Can only see the inside of the motor acmotor2.blogspot.com terminal block wiring board, from Induction motor below strips can tell, is the dc and ac motor.

TB6560 stepper motor drive circuit design

Stepper motor is a kind of electrical pulses into angular displacement of the actuator. Driver receives a pulse signal, after driving a stepper motor according to set the direction of a fixed Angle. First of all, by acmotortrading.blogspot.com controlling the pulse number to control the amount of angular displacement, so as to achieve the purpose of accurate positioning; Secondly, by controlling the pulse rate to control the motor rotation speed and acceleration, so as to achieve the goal of quick generator set spare parts rinse. At present, the stepper motor with low inertia, high positioning accuracy, no accumulation error, simple control and so on, has been widely applied in electromechanical ac motor integration products, commonly used for positioning control and constant speed control. Stepper motor driver circuit commonly used chip L297 and L298 composite applications, 3977, 8435 and so on, these chips are generally single lamination drive current is controlled in 2 A, unable to drive more powerful motor, limits its application scope. This article is based on Toshiba company launched in 2008, stepper motor driver chip TB6560 put forward a kind of stepping motor drive circuit design.

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.