Submersible pump motor repair 10 points for attention

Mine submersible pump motor electromagnetic part and ordinary motor basic same, therefore, electromagnetic failure and repair, but due to the particularity of explosion-proof motor. In carries on the repair or reconstruction, it shall comply with the following provisions: The relevant personnel should understand, repair units and the relevant national laws and regulations, explosion-proof standards for repair work and the relevant provisions of the qualified products. Second, the unit should have for explosion-proof motor repair process equipment and the necessary inspection and test apparatus. Before three, maintenance, should prepare the necessary technical data. Four, commissioning before the motor repair, check the cable entry, relay protection and wiring system, to ensure that the company is still in good condition and conform to the requirement of explosion protection. Five, to engage in explosion-proof motor maintenance personnel should undertake the necessary training. After six, after inspection and acceptance of the inspection items, is made by authorization of the explosion-proof test unit or recognition, can be in repair units; Think it is necessary to project still explosion-proof test unit by explosion-proof inspection unit.

After repair, explosion-proof motor should be to use the department to provide the following documents: 1) fault inspection; 2) repair work instructions; 3) Motor vehicle replacement and repair parts catalog; 4) inspection and test results; 5) repair certificate. Eight, are not allowed to repair the piano pieces 1) by the size of glass, plastic or other unstable parts made of materials; 2) fasteners; 3) the manufacturer or explosion-proof code that can't repair parts, such as encapsulation component. A sign of nine, after the repair will not affect the explosion-proof performance of repair, after repair without repair. Ten, the flame-proof certification after after repair motor repair the repair unit inspection department shall issue certificate of approval. Described above shall include at least by repairing the name, type, specification, water pump explosion-proof motor logo, the name of the class units and its approval certificate number, explosion-proof certificate number, date of repair, etc. The standard code for GB3836.13-1997 after the repair. Signs must be norm, durable, and resistant to chemical corrosion. Signs should be metal materials, commonly permanently fixed on the motor after the repair, repair again, after repair, the previous repair sign shall be removed.

Electrical engineer driver amplifier

In electrical engineer concluded driver amplifier including logical explanation module and current amplification module. Driving amplifier accept stepper pulse, the direction signal input, such as output in the two groups (or groups) controlled current to two (or more) of the motor winding. Logical explanation module according to user's PC from stepping pulse and direction signals and offline, make each coil winding current switch in turn, so that the stepper motor rotor spinning. The motor works only two kinds of control engineering net all rights reserved, namely the whole work step and half step, step Angle is determined by the motor structure. When the basic step Angle can't meet the requirements, need to be subdivided driving. Where each input pulse switch, without current rotor cutting machine all-pass or broken, but only change the corresponding part of the winding current, thus the rotor are only part of the basic step is apart from the Angle of rotation. Segmentation function by precise control of motor phase current generated by the driver, has nothing to do with the motor. After segmentation, relatively stable output current change, to some extent, improve the output torque, reduce the low frequency oscillation of motor, improving precision permanent magnet motors for sale of step distance. Specific depending on the degree of segmentation and improve the quality of the driving circuit.

For good quality motor, generally more than 16 ~ 32 subdivision has no significant effect, but may slightly reduce the www.dongfeng-motor.com vibration and noise. Current amplification module logic signal amplification into working current. More commonly used is made up of field effect tube H bridge circuit. Field effect tube can be an electronic switch control engineering net all rights reserved, like the light switch. The use of this type on-off switch to adjust the current commonly used way is chopping constant current. Constant current is constant current. Chopper is cut need higher current wave. To a leaking water in the cup, for example, such as the speed is greater than the water leakage of water, sugar, and so as to avoid overflow. The field effect tube opening, the current rise. When the current just over, field effect tube shut off, the electricity was cut, fall off. Dropped to below setting, open field effect tube again, current rise again. Repeatedly switch with motor coil inductance, current stays at the set value. Need to point out that some of the driver amplifier calorific value (temperature) is not very big, some are small. The main reason is that most of the field effect tube hundreds of milliohm resistance are. Most optimal company Shanghai drive field effect tube resistance between 10-30 milliohm, so much smaller calorific value than ordinary drives. The surface temperature of the drive is associated with heat and heat dissipation area. Shanghai optimal abro drives due to the small size (matchbox size), so although the calorific value is very small (typically less than 1-2 w), but in some large current (4 to 8 a) the workplace, still need to install it on the offer of flange and fixed on the motor or the cabinet to heat dissipation.