Practical knowledge of electrical engineering

 Three-phase 3 phase induction motor five wire with color yellow, green, red, light blue, respectively the U, V, W, N protective earthing line double color (PE) transformer in operation, each transformer phase current should not exceed electric motor rated current; The maximum unbalance current shall not exceed 25% of the rated rotor current. Transformer operation should be performed periodically maintenance. The same transformer power supply system, unsuitable mixed protective earthing and protection by zero. The voltage transformer secondary coil normally rated voltage 100 v. Secondary side of voltage permanent magnet generator transformer at work may not be rotor and stator short circuit. Due to short circuit will produce a lot acmotor2.blogspot.com of short circuit current, may burn out diesel generator set transformer, voltage transformer for this time, secondary side are installed fuse protection. Secondary side of voltage transformer must be grounded at one end. This is to prevent the secondary synchronous generator coil insulation breakdown, a high pressure into the secondary small diesel engine side, endanger the safety of person and equipment. Current transformer secondary side close to the short circuit conditions at work. Rated current of the secondary coil is commonly 5 a current transformer secondary side is not electric generator allowed to open at work, current transformer secondary side generator must be grounded at one end, to prevent the first and second coil insulation breakdown, the side of a high voltage into the secondary side.

Three permanent magnet ac servo motor

 3 Phase induction Electrical Motor MS Series for winding machine

Specifications
ambient temperature:-15 -40 
above sea level : not exceed 1000m 
rated voltage:+-5% 
A - B (ALLEN - BRADLEY) companies in the United States to drive the division production type 1326 ferrite permanent magnet water pump ac servo motor and 1391 type ac PWM diesel engine servo controller. Motor including three stand diesel generator number, a Water pump total of 30 specifications. I.D. (Industrial Drives) is a famous American Industrial drive arm of cole (Kollmorgen) Morgan had production of BR - 210, BR - 310, three series, a total of 41 BR - 510 specifications of the brushless servo motor and BDS3 type servo Drives. Since 1989, launched a new series design auto spare parts of mixed Jian stolen deity (Goldline) permanent magnet ac servo motor, including B (small inertia), M (inertia) and EB (explosion-proof) three categories, there are 10, 20, 40, 60, 80 five stand, each categories has 42 specifications, are all made of ndfeb permanent magnet materials, range of 0.84 ~ 0.84 N.m torque, power range of www.dongfeng-motor.com 0.54 ~ 15.7 kW. 


iron motor shell motor parts pig casting iron 
Specifications
1.iron or steel 
2.sand casting 
3.ISO,UL,FM,LPCB,VDS,TS16949 
4.timely delivery 

5.reasonable price 
Form a complete set of drives have BDS4 (simulation), BDS5 (digital model, including position control) and Smart single phase induction motor Drive type (digital) three series, 55 a maximum continuous current. Goldline series represents a new level of modern permanent magnet ac servo technology. Ireland originally Inland Kollmorgen abroad a division, is now incorporated into the AEG, ac synchronous generator to produce dc servo motor, dc torque motor and servo amplifier is known. Production BHT1100, 2200, 3300, three stand, a total of 17 kinds of specifications of the SmCo permanent magnet ac servo motor and eight kinds of controllers. French Alsthom group alternator generator in Paris Parvex factory LC series (long) and GC series (short) ac servo motor, a total of 14 specifications, and production AXODYN series drives.

Servo motor type selection calculation method

CCC CE ROHS UL VDE Certification and 115/120 V AC Voltage 220V&120V induction motor

Specifications
1. Specifications1.3-phase asynchronous motors 
2. IEC standard 
3. OEM 
4. Voltage:50HZ &60HZ;380V&415V 

5.Protection class: IP54 
The 3 phase motor 3 phase induction motor confirmation of a, rotational speed and the encoder resolution. Second, the motor shaft load torque conversion and deceleration torque generator calculation. Third, electric water pump the computational load inertia, moment of 3 phase induction motor inertia of the match, yaskawa servo motor as an example, the partial products of inertia matching up to 50 times, but actually as small acmotor2.blogspot.com as possible, so good for precision and response speed. Four, regeneration of resistance calculation and selection, for servo, generally more than 2 kw, outside to ac synchronous generator configuration. Twisted-pair cable shielding five, cable selection, encoder, absolute value encoder diesel engine magnetic generator for yaskawa servo plot of products is 6 core, incremental is four core.

Wire and cable fault judgment

ac three phase asynchronous electric motor stator 
Specifications
1. 20 years manufacturing experience 

2. competitive price,high quality
1, the damage of rectifier module: water pump price is usually caused by power grid voltage three phase induction motor or internal short circuit. Under the condition of eliminate internal diesel engine short circuit, replace the rectifier bridge. generator price At the scene to deal with failure, verify the user should focus on power grid, such as power grid voltage, whether of power grid Water pump pollution equipment such as electric welding ac synchronous generator machine, etc. 2, the inverter module damage: general is caused by motor or cable damage and drive circuit fault. After repair of drive circuit, good condition, the measured waveform change module. After replacement driver board in the on-site service, but also must pay attention to check the motor and connecting cable. ac synchronous generator Without any fault is decided, the operating frequency converter. 


MS160 Electrical Induction Motor
Specifications
MS160 Electrical Induction Motor 
1.100% Copper Wire 
2.Voltage Tolerance 5% 
3.Aluminum , CE, ISO9001 

4.Factory Promotion IE2 
3, the electricity no display, usually due to damage or soft charging circuit switch power supply damage caused no dc dc, such as starting resistance is damaged, it is possible that the panel damage. 4, after power on display over voltage or under voltage: general due to the input phase, be affected with damp be affected with damp circuit aging and circuit boards. Find out the voltage detection circuit acmotortrading.blogspot.com and check points, to replace the damaged parts. 5, after power on display over current or grounding short circuit is generally due to the damage of electric current squirrel cage induction motor detection circuit. And such as hall element. 6, start, display overcurrent: is usually caused by inverter module drive circuit or damaged.

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.

Current transformer, transformer principle

Totally Enclosed Protect Feature and Three-phase Phase low rpm ac electric motor
Specifications
Specifications1.3-phase asynchronous motors 
2.IEC standard 
3.OEM 
4.Voltage:50HZ &60HZ;380V&415V 

5.Protection class: IP54 
Large and small current in the power supply electric circuit voltage difference from several to tens of thousands of AnDouYou Ann. For convenience of secondary instrument measuring need into a more uniform current, in addition line voltage is high, such as direct measurement is very dangerous. Current transformer is current 3 phase ac induction motor transformer and electrical isolation effect. Earlier, most of display instrument is a pointer type current meter, so the current transformer secondary level most of the electric current is the ampere (e.g., 5 a, etc.). Now wholesalemotor.blogspot.com most of the power measurement, digital and computer sampling signal is commonly milliamperes (0 to 5 v, 4-20 ma, etc.). Micro ct (current transformer) secondary current as milliamperes, between the main transformer and sampling. Micro current transformer has also been called "instrument use current transformer". (the instrument with a current transformer with a layer of meaning is using more current than Induction motor the precision of the current transformer in the laboratory, is generally used electric motor in expanding instrument range.)

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.