Motor experts enter, motor experts enter!

There are many kinds of motors now! Yes J series JO series motors have been in production for a while! After that, it's the Y series!

After that, iy2 now has y3, do you distinguish it? The best way to distinguish the motor is that the wiring cover is generally 4 screw holes. JO2 is generally 2 screw holes.

There is also a motor hood y of square holes! Dense 1 and jo2 are long strips made up of rows and rows! Traction motors!

It's that the motor rotor is hollow! And the normal motor is solid! The lifting motor has a deceleration device!

The look is different! I can't tell! Anyway, I understand!

I can't tell you! I'm sorry to know that.

J2O should be JO2, JO2 motor appearance is larger than the Y series, and heavier than it, and then the distance between the heat dissipation ribs of JO2 is wider (the appearance is large and wide, the slot) the end cover is drum, the Y series is lighter, the distance of the heat dissipation ribs is closer, most of the end covers are flat covers, more than 11kw, the end covers are some drums, and most of the lifting motors have a brake wheel or brake behind them.

JO2 Y is the series code of the motor, J2 JO2 has been forced to stop production and phased out since the late 80s of the last century, and its mechanical efficiency and power factor are relatively large. Y series is a new series of motors that began to be produced in the late 80s of the last century, with low energy consumption and light weight, which is mandatory by the state. The traction motor and lifting motor you mentioned are all special motors, which are suitable for special industries.

Both appearance and model can be distinguished.

The racing motors are all brushed permanent magnet DC motors, and there are fast loss commutators.

The three coils are for motor starting, and there is no "starting dead center".

Principle please.

What problems you need to solve, you can ask them. Although they are all made of motors, they are involved in different fields, such as: asynchronous motors, synchronous motors, DC motors, and gas turbines.

And so on, some are doing craft, some are doing design, so I don't know what kind of problem you need to solve.

Longhua Lichuang motor tells you that if you want to make the motor (speed regulating motor) of the application not only meet the requirements of the drag machinery, but also can be used safely and reliably for a long time, it is necessary to reasonably choose the motor (speed regulating motor). When choosing a motor (speed regulating motor), it should be reasonably selected according to the technical requirements of the production machinery and the characteristics of the use environment, which should not only ensure the safe and reliable operation, but also pay attention to the convenience of maintenance and save investment and operating costs.

1. Protection level. The protection level of the motor (speed regulating motor) shell should meet the requirements of the installation location environment of the motor (speed regulating motor).

2. Rated voltage and frequency. The rated working voltage and frequency of the motor (speed regulating motor) should be consistent with the voltage and frequency of the power supply used.

3. Rated power. The rated power of the motor (speed regulating motor) should match the mechanical power of the drive as much as possible. Among them, for machinery with undetermined load, it should be selected according to the power of the machinery; For machinery with load fluctuations, it can generally be selected according to the equivalent current method, but the allowable overload capacity should be small.

The induction motor is an asynchronous motor, because the rotor current of the asynchronous motor is the induced current, so it is also called an induction motor. The induction motor generates a rotating magnetic field after the stator is fed with alternating current, and induces an electric potential in the rotor, and the rotor has a closed loop to form a current. Electromagnetic noise is caused by the effect of electromagnetic force on the core of the motor coil, etc., so the symmetry of the motor structure, the stability of the structure, and the process are all causes of the noise.

In addition, the lower harmonics (generally 3 or 5 times) due to the larger amplitude and greater electromagnetic force generated, so the motor manufacturing is generally considered to eliminate short-distance windings and distributed windings, and if the process deviation cannot be completely eliminated. In addition, higher harmonics tend to produce harsh sounds, but the composition is very low. In addition, when the motor runs to a certain frequency at low speed, it will reach the frequency of resonance with its mechanism, and then it will resound the roar, which is normal, and if it is controlled by a frequency converter, the operating frequency can be shielded to eliminate.

Single-phase 220ov induction motors are mainly used in power tools. This motor is wound on the rotor because the wire is turned on, and when it needs to pass through the copper touch ring of the central shaft, it will emit electrical contact spark noise. If you want to avoid noise, only silicon steel sheets are used for the rotor and coils are used for the stator.

This kind of motor has no noise, but this kind of motor is heavier, and the stator coil needs to be pressed in the stator silicon steel sheet groove, and the weight needs to be doubled, which is why power tools are not used. For example, if the stator is made of high silicon steel sheet, the volume can be reduced by a certain amount, and the rotor can be made of neodymium iron and N to remove the noise of the carbon brush motor.

I am a motor designer, electromagnetic noise is mainly related to slot fit and coil design, slot fit after so many years of development, now there are fixed slot fit, the data are there. China is still using the slot fit of the foreign years that is the near groove fit, now the foreign use of the far groove fit, the test results prove that the far groove is smaller than the near groove electromagnetic noise, the main reason for the electromagnetic noise is the high harmonic, the 3rd harmonic and the even harmonic of the motor are automatically canceled, so the main thing is to eliminate the 5th harmonic, the method usually used is to use the short distance winding, in general, the winding pitch is designed to be 5 6 pole distance.

The silicon steel sheet is not tightly stacked, the downline is not tightly tied, and the paint is not good.

Induction motors are asynchronous motors, but they are named from different angles. As for the electromagnetic noise, the asymmetry of the magnetic field mainly causes the buzzer to appear in the silicon steel sheet. The asymmetry of this magnetic field is theoretically related to the distribution of motor windings, stator rotor cogging and other factors, and the manufacturing quality of the core is also very related, such as whether the core is fully compressed, whether the winding core is impregnated, etc.

The single-phase motor you mentioned is noisy, because the single-phase motor uses the orthogonal two-phase winding to form a circular magnetic field, and the single-phase motor uses the capacitor or shaded pole method to make the two-phase winding orthogonal. And the three-phase motor will be better on this issue. However, there are corresponding factors such as winding distribution and cogging, which are related to the motor designer.

The quality of the core makes the manufacturing process problematic.

1. All turn-to-turn instrument: It is a motor winding with the detection of inter-turn withstand voltage inspection equipment, according to the voltage of the motor is different, the voltage requirements for detection are also different, you two one is the high-voltage motor detection, the other is the detection of the low-village motor.

The dust is from the windshield of the motor, the end of the motor is connected to the fan blade on the spindle is to blow air into the motor, to help the stator winding heat dissipation, the fan is straight, regardless of the forward and reverse fan is to send air in, (that is, to suck the air inside) dust is also from here, some motors are equipped with a sponge that is easier to breathe in the end of the motor, which is used to filter dust. Today's distribution cabinets are equipped with this kind of sponge, which can not only ventilate and dissipate heat, but also filter dust, as long as the sponge is broken regularly. This sponge should be thin and sparse.

You can use silk cotton and cut it into the shape of a wind cover. Ask for adoption!

The sealing level of the motor is poor, and it is recommended to use the sealing grade to exceed IP55

If it is a carbon brush, it is normal, and the graphite copper powder produced after the wear of the carbon brush motor is there.

Lubricating oil is related to speed, generally speaking, fast speed is the choice of small viscosity lubricating oil, slow on the contrary 2

There is no comparison between 6kV motors and 380V motors, and motors with a power of 6kw have a voltage of 380V, and vice versa. The selection of lubricating oil also depends on the load of the motor, the large load is selected with large viscosity, and the small one is the opposite.

The oil in the motor comes from the sealing pad, and the hazards after the oil are in

1) Erosion of the insulation of the motor, accelerate the aging of the insulation;

2) Reduce the purity of hydrogen in the motor and increase the amount of hydrogen supplementation for sewage discharge;

3) If the water content in the oil is large, the hydrogen humidity inside the motor will increase, the insulation will be damp, and the electric breakdown strength of the gas will be reduced, which may cause a short circuit between the phases inside the motor in serious cases.

Treatment: (1) Control the hydrogen and oil pressure difference of the motor within the specified range, not too large, to prevent oil ingress;

2) The operation personnel should strengthen the monitoring and find that the oil is discharged in time to prevent a large amount of oil from accumulating;

3) Keep the oil quality qualified;

4) Frequently put in the hydrogen dryer to reduce the humidity of the hydrogen;

5) If the sealing pad is defective, it should be stopped as soon as possible.

It doesn't matter if there is a small amount, it will be naturally dried during operation, if there is more, it will not work, it will form oil scale accumulation, dirt will reduce insulation, and the motor may be burned. Disassemble the motor, clean it with transformer oil, bake it dry, and soak it again if possible. It doesn't matter if there is no insulating qi, you can dry it.

The power supply voltage, and the voltage at both ends of the motor is, and there is no start, so, the voltage added to both ends of the resistance is: , the current is: = , then, your motor winding is: = oh, then, you want to think about the voltage of your motor, you can calculate, remember that the starting current may be larger, not so ideal, your resistance should be smaller, and the power is OK.

Such a simple question, change to a small resistor.