No spark machine

 AC fan cooling motor fan cover 
Specifications
1. Customised 
2. good quality 
3. Surface treatment: Galvanize 
4. Type: Motor Cover 
Refers to the normal operation condition, not lit around the explosive mixture, and generally will not happen again light the motor fault. Compared with increased safety type motor, in electric fan motor addition to the insulation dielectric strength test voltage, winding temperature rise, te (at ambient temperature reached highest rated running after the final temperature of ac winding, since started by starting current meter to temperature rise to the limit of time) and starting current than not Single phase motor like increased safety type has special provisions, and other aspects to add safety type magnet generator motor design requirements.

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

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.

Brushless motor base 2

And the stator magnetic field, the space of the stator current vector can be decomposed into vertical and parallel to the rotor magnet axis of two components. Vertical direction of the magnetic fields generated by the motor vehicle spare parts current component orthogonal to the rotor's magnetic field, this creates a rotating torque. And the magnetic axis parallel to the rotor current component, in line with the rotor magnetic field generated by the magnetic field, won't produce any moment. So, will need to make this a good control algorithm in parallel to fan motor the direction of the rotor magnetic axis and minimum current component, because the current component can make the motor only produce excess heat, and bearing wear. We need to control current of coil, in order to make magnetic axis perpendicular to the rotor current component in the direction of maximum. 

Thus the motor torque and in proportion to the size of the current component. In order to effectively achieve sustained steady torque, we need an ideal steady magnetic field, to produce a stable stator current space vector, and the magnetic field need to follow the rotation of the rotor magnetic field with real-time vertical remain forever. From ac motor the perspective of the rotation of the rotor and the stator current space vector wholesalemotor.blogspot.com on the numerical value should be a stable value. So in the process of motor rotation, the space of the stator current vector representation should be a circle. As a result of the stator current vector is produced by the three groups of coil current component will overlap and become, and on the physical structure of the coil is the spacing between 120 degrees, so the motor current vector should be a string of three groups of ideal wave signal will overlap and become, at the same time, the three sets of strings is 120 degree phase Angle between wave signal.

Multimeter use the matters needing attention

(1) before using the multimeter,should be "mechanical zero",namely when no power being measured,the multimeter pointer refers to in the position of zero voltage or zero current.(2) in the process of using the multimeter,can't use hand to touch pens and metal parts,so that on the one hand can guarantee the accuracy of the measurement,on the other asynchronous motor hand also can generator generator set guarantee personal safety.(3) in the measurement of a certain power,not in the measurement of shift at the motor vehicle same time,especially in measuring high voltage and large current,more attention should be paid to.Otherwise,can make the multimeter.For shifting,should first disconnect pens and,after the shift to measure again.(4) multimeter when use,must be placed,so as not to cause the error.At the same time,but must pay attention to avoid the influence of external magnetic field on the multimeter.(5) the multimeter after use,should be the biggest block switch in the ac voltage.acmotortrading.blogspot.com If you don't use for a long time,also should be multimeter out internal battery,so as to avoid battery corrosion of other devices in the table.