Current transformer dynamic stability and thermal stability check

 electric motor stator rotor lamination motor parts 
Specifications
1. Lamination of electric motor 
2. IP54 class F 
3. 100% copper 
4. silicon steel stamping 
5.stunning performance 
Manufacturer of the product technical parameters are given in dynamic stability multiples Kes and thermal stability of multiple Kt, so according to the following formula check dynamic stability and thermal degrees respectively. 1) dynamic stability check of Kes x I1N acuity iSh and 2) thermal stability check (KtI1n) 2 t p I (3) up tima type, t for the thermal stability of the current time. 1) wiring shall comply with the series of current transformer principle: namely a winding shall be measured circuit in series, and while the secondary winding with all instrument load series; 2) according to the measured current size, select the appropriate change, otherwise the error will increase. At the same time, secondary side must be grounded at one end, in case once insulation damage, a side high pressure into the second low voltage side, personal and ac motor prices equipment accident; 3) secondary side is absolutely not allowed to open, because once the open circuit, the primary side current I1 all become the magnetizing current, causing phi m and E2 in, cause excessive iron core saturation magnetization, serious fever and burning coil; At the same time, the excessive saturation magnetization, magnetic circuit make error increases. In addition, two ANP gost motor side open-circuit make E2 reaches hundred volts, once touched cause accident getting an electric shock. Therefore, the current transformer secondary side is equipped with short circuit switch, prevent side open at a time. 

OEM industrial electric motors
Specifications
1. effiency: IE2 and IE1 
2. 20 years manufacturing experience 
3. 12 months guarantee 

4. low noise and vibtration
As shown in figure l K0, in use process, once a secondary side open circuit must be removed immediately circuit load, then, to stop processing. Handle all the rear can be used again. 4) in order to meet the measuring instrument, relay protection, acmotortrading.blogspot.com circuit breaker failure judgment and fault wave record device, the generator, transformer, wire, bus section circuit breaker, bus coupler circuit breaker and the bypass circuit breaker loop are set with 2 ~ 8 secondary winding of current transformer. For large current grounding system, generally by the three-phase configuration; For small current grounding system, in accordance with the specific requirements according to the two phase or three phase configuration; 5) for the protection of press with current transformer installed location should be as far as possible eliminate protection device of the Lord is not reserve to set. For example, if there are two sets of current transformers, and location allowed, should the circuit breaker, on both sides make the circuit breaker is in the scope of protection of the cross; 6) in order to prevent the pillar type current transformer bushing flashover caused by bus fault, current transformer is usually arranged in line or transformer side of the circuit breaker; 7) damage, in order to reduce the generator internal fault is used to automatically adjust the excitation device of current transformer should be arranged in the outlet of the generator stator winding side. In order to facilitate analysis and found that internal fault before generator into the system, used for measuring current transformer should be mounted on the generator neutral point.

Trapezoidal wave type in phase 5

AC induction cooling fan motor 
Specifications
1.Customised
2. good quality
3. 20 years manufacturing experience

 In the case of vector control, we main control corresponding to the rotor magnetic field parallel and perpendicular direction of motor current and voltage. This suggests that we measured by electrical current must pass a PI controller for mathematical calculations, and then from the stator three phase static structure into the lamination dynamic structure of rotor d - q (parallel and perpendicular to the rotor magnetic field direction). Also, the control voltage at the motor also need through mathematical calculation to its by the rotor structure of d - q into the stator three phase static structure, and then input to the PWM modulation part. These transformation requires that we have the ability of mathematical processing, DSP and high-performance processors will be used as the core of the vector control. Although the www.dongfeng-motor.com transformation of the structure to need one step calculation could be done, but we will use two steps to describe more convenient. 

Motor current first from the structure of the physics 120 degree phase stator three phase into a stable dynamic orthogonal orthogonal d - q structure, and then by the dynamic structure of the stator into the three-phase static structure of the rotor. In order to ensure effective results, these calculations must be P - I controller made within a sampling period. The above this kind of transformation and P - I needed for the controller voltage signal from the d - q structure into the phase structure of the stator coil operation just the opposite. Once the motor current is converted into d - q structure, control becomes very simple. We need two way P - I controller; A parallel control and rotor magnetic field of current, a vertical current control. Because of the parallel to the current control signal is zero, so it's make motor is parallel to 12v motor the current component is zero, it also have driven motor current vector all into vertical current. Since there is only vertical electric current to produce effective torque, motor efficiency is maximized. One P - I controller is mainly used to control the fan cover vertical current, torque demand in order to obtain consistent with the input signal. This also makes the vertical current was controlled in accordance with the requirements in order to obtain the required torque.

3 okw motor, 380 v voltage. The power factor is 0.2, could you tell me how to calculate the rated current?

electric motor 20hp aluminum body 
Specifications
1.AC motor aluminum body 
2.customized 
3. 20 years manufacturing experience 
4. competitive price,high quality 

Rated current I = P30KW U0.38 KV / 1.732 * * 0.2 = 227.9081 A, but electric motor 12v 500w 30 kw motor power factor can't be so low ah, do you want to calculate no-load running current of motor. The question you ask is problematic. ac three phase motor 30 kw motor power factor should be above 0.75. If according to the capacity of current rating: I = P30KW U0.38 KV / 1.732 * * 0.75 = 60.7755 A. Teach you two formula, very useful: "capacity divided by the number of kv, dealer by coefficient of seventh. "A kw, two current" can estimate the rated current of three-phase motor. Low power factor, then the acmotor2.blogspot.com motor should be banned the example of the net. Line current of three-phase ac asynchronous motor I material 2 P, P - power, kw. I material 2 x 60 kw motor current 30 = 60 a.

Air conditioning refrigerating capacity calculation formula

Air conditioning refrigerating capacity calculation formula:a:air conditioning,horse originally refers to the input power,including compressor,fan motors and electrical control part,due to different brand their specific system and 8500w gasoline generator electric control design,the output of the refrigerating capacity of different so the refrigerating capacity in terms of output power.In general,the refrigerating capacity of the electricalmotor1.blogspot.com 1 horse big efforts to 2000 calories,converted to international units should be multiplied by 1.162,so the refrigerating capacity of 1 horse stress 2000 kcal x 1.162 = 2324 (w),w here (tile) indicates that the refrigerating capacity,the horse should be 1.5 2000 kcal x1.5 x1.162 = 3486 (w),and so on,

according to the situation,can roughly determine the horse number of air conditioning and refrigerating capacity,in general,can be called a 2600 w,2200 w,1,4500-5100 (w) (w) can be called two horses,a 3600 w,3200 w can be referred to as 1.5.Refrigerating capacity is determined,can according to the motor vehicle actual situation to estimate the capacity of his own family,choose a suitable air conditioner.The greater part of household appliances consume refrigerating capacity,TV,lamp,refrigerator and other every w (w) power consumption refrigerating capacity 1 (w),the direction of the doors and Windows also consumes a refrigerating capacity,the east diesel generators prices window 150 w/m2,west Windows 280 / m2,the south window 180 w/m2,north of 100 w/m2,window so the roof and may consider appropriate to increase the capacity of with a western. When choosing air conditioning,please according to the above introduction,the refrigerating capacity of the estimate for the own size,and choose to the satisfaction of the air conditioner.

What Y112M - 6 at the back of the motor,why have a plenty of 4,the difference is?

 Refers to the series motor,the speed number,tell you series on behalf of the number of speed,level 2 is about 2900 turn,grade 4 is 1450 turn around,level 6 is single phase generator around 950 RPM,a magnitude 8,70acmotor2.blogspot.com0,10 is around 550.1 motor model y112m - 4-4 kw is what mean? Is 4 kw or more kw? Y:three-phase asynchronous motor.112:high stand center.M:short frame length code base M frame length L of the 4:magnetic pole small electric motors number 4 kw,4 kw 2 "Y112M - 2 4 kw motor no-load current should be? Y112m - 2 no-load current rated current 7.99.2.7 y112m - 4 rated current no-load current of electrical motor 3.8 3.8.This is the national standard,general market standards.

Motor are briefly introduced

Motor is a kind of rotary electric machine, motor. Motor electrical energy into mechanical

www.facebook.com/guohong.trading energy, it mainly includes a magnetic field to

produce electromagnetic winding or the distribution of the stator winding and a rotating armature or rotor. Under the effect of rotating magnetic field of stator winding, the effective of the electric motor stator winding is energized and make its rotation by the role of the

magnetic field. According to the reversible motor principle, if the motor without any change in its

structure, motor or motor use, also can be used for the generator. It is the electrical

asynchronous motor energy into mechanical energy of a machine. Usually work part of

the motor rotation, called the motor rotor motor; Also has a linear movement, known as linear motor. Electric function provides a large range of power, class from milliwatts to kw. Machine tools, water pumps, motor drive; Electric locomotive, elevators, traction motor is electric motors pricerequired. Family life of the electric fan, refrigerator, washing machine, and even all

kinds of motor toys is inseparable from the motor. Motor has been used in all aspects of modern

social life.

The same power of motor, one is two, one is 4 pole in the speed and frequency condition

1. The logarithm is poles? Bipolar electric mechanic frequency speed in 2800-2900 revolutions, no-load speed close to 3000 RPM. 60 hz tribute American standard (Japan) is 3400-3600. Quadrupole motor is 1300-1450 revolutions, no-load speed close to 1500 RPM. Logarithm of np, synchronous speed for W = 3000 / np, rated speed = W * (1 - s), s is slip, generally about 5%. 2. 2, 4 or 6 pole of the motor is given polarity logarithm, the less pole logarithm, the higher the speed. 2 pole (1 to pole) synchronous speed is 3000 generator stator RPM of the motor, induction motor speed than the synchronous speed slightly wholesalemotor.blogspot.com low, about 2850 turn around, the difference between the asynchronous and synchronous speed is known as slip. 4 pole (2 pole) synchronous speed is 1500 RPM of the motor, induction motor speed than the single phase electric motor synchronous speed slightly low, about 1470 to turn around. 

Their relationship: n = 60 f/P (synchronous speed) (n = RPM, f = power frequency, P = pole logarithmic) 3. The diode in the three-phase circuit of 50 hz motor rated speed 2850 RPM, quadrupole 1450 turn around, the less the number of speed faster, the fastest speed in three-phase circuit of 50 hz is clips, the slowest is 16 】 【 I used, electric motors price direct current (dc) function of twenty thousand turn above. Diode quadrupole refers to 【 】 360 degrees in the motor stator coil of the magnetic field generated in several N S pole at the same time. 4.2 and 4 pole is targeted at the poles, the number, the more is, the more its logarithm, its corresponding rated speed is smaller, but the number is even, so no 2 4 pole pole turn fast, requirement is the same to say so

The purpose of the motor

Motor USES many to heavy industry,and a small toy,in its tracks.In different circumstances can choose different types of wholesalemotor.blogspot.com motor,the following are some examples: The wind device,such as electric fans Electric toy car,boat,etc Elevator,the elevator With electric powered vehicles,such as underground railway,trams Automobiles,jet and helicopter starting motor (starter motor) Factory with big lots of conveyor belt The electric automatic doors on the rotor balancing machinebus Electric roller shutter Consumer goods drive The printer The

washing machine The water pump Disk drive Electric shaver The tape recorder Video camera CD players Industrial and commercial purposes Express elevator Machine tools (such as: machine tool) loom 8500w gasoline generator A blender.