Stepper motor current attenuation model

 Y series best cast iron three phase induction motor
Specifications
1. 20 years manufacturing experience 
2. 12 months guarantee 
3. low noise and temperature rise 
4. high starting torque 
5. AC Voltage: 220V/380V, 380V/660V,400V/690V,220V/400V

Stepping motor subdivision way now basically is the current segmentation method, the phase current according to the sine wave current point as electric motor 12v 500w segmentation point tangent. Control current at the phase current to achieve segmentation points to control the attenuation, otherwise the message will appear angles overshoot will not accurate stay on view point of electric motor fan cover breakdown. Different attenuation pattern choice of motor speed. When high speed fast, when low speed slow decay. When high speed slow attenuation will appear big vibration and high noise. Low speed choice fast attenuation will lead to serious when a motor is unable to locate. Motor control IC is wholesalemotor.blogspot.com for H bridge by current attenuation on the control of the switch tube model. Slow attenuation high side tube shut, fast attenuation at high and low side pipe is closed. Hybrid damping is first in a quick and then to slow decay, mix proportion of time of decay because of chips and power is not the same.

Frequency conversion control principle of frequency conversion air conditioning

Air conditioning switched on, the PTC get indoor to outdoor 220 v alternating current (ac), if the diaphragm normal frequency conversion power, switching power supply output + 5 v to the CPU to work outside the machine, and machine within the CPU to establish communication between inside and outside the machine, the machine have to electric power relay and absorption, make the electric motor fan cover mechanical and electrical source is no longer by PTC, as shown in figure 14. Three minutes later, the machine CPU output "three phase six take" trigger signals and outer fan running, outside the compressor and the fan operation. Machine outside the CPU through the galvanometer coil machine wholesalemotor.blogspot.com plate compressor operation to set up the feedback signal, if the compressor can not start properly, abnormal operation feedback AC lamination synchronous generator signal, output frequency signal to stop 1 minute after the CPU and fan after 30 seconds to stop running. IPM flow or overheating, Vfo end output signal to the machine outside the CPU, outage protection.

What maintenance electrician to specific professional skills

A door technology can foothold in society.Maintenance electrician belongs to technical professionals,our country is lack of senior technicians,if electric motor 12v 500w you learn good,also is very promising in the future.Main master electrician: maintenance electrician knowledge and basic skills,indoor wiring installation,grounding device installation and maintenance,repair and maintenance of common transformer,disassembling and maintenance of various commonly used motor,commonly used low voltage apparatus and distribution equipment installation and maintenance,motor control circuit basic installation and maintenance,commonly used machine tools installation and maintenance of electrical wiring,electronic circuit installation and debugging,acmotortrading.blogspot.com electrical control circuit design,programmable power electric motors controller and its application.As to hard to learn,the key see yourself don't work hard,go for it,have confidence in myself,should be able to learn well.

Dc resistance test in the road

 A multimeter is ohm block,the direct measurement of IC on the PCB pin and peripheral components to a direct current 8500w gasoline generator resistance,and compared with the normal data,electrical motor the method to identify and determine the fault.When measuring the attention should be paid to the following three points:(1) measurement to disconnect the power before,to avoid damage when testing meters and components.(2) the multimeter internal electricalmotor1.blogspot.com voltage electric block shall not be greater than 6 v,range it is better to R * 100 or R * 1 k.(3) measurement IC pin parameters,pay attention to the measurement conditions,such as the model to be tested,the electrical motor 24v moveable arm of a potentiometer position related to IC,etc.,also consider the stand or fall of peripheral circuit component.

The maintenance of construction machinery used in motor brush?

(1) brush label shall comply with the working characteristic of motor,shall not be used on 1 electric motor brush two different symbols.(2) there should be no shaking of the brush in the brush and stagnation phenomenon,brush and brush holder should 220v electric motor be 0.10 ~ 0.20 mm gap between brush edge to the slip ring or distance on the surface of the commutator with 2 ~ 4 mm advisable.(3) the brush and the connection of copper braid,the connection of copper braid and brush holder shall be ensure good contact perkins diesel generator and secure. Copper braid shall not and motor rotational part to touch or touch shell grounding.(4) the brush on the slip ring or commutator pressure numerical should comply with the regulations of brush label and manufacturing plants,or adjust to the lowest pressure,no sparks in general is 0.15 ~ 0.25 KGF/cm~2 (5) brush wear IE2/IE3 electric motor degree,shall not be more than two-thirds of the original standard height.(6) after brush wear,should be replaced by the original label,and will contact with glass sand,make www.dongfeng-motor.com the contact area of not less than 75%.

Motor USES the application

Is the most widely used in all kinds of motor ac asynchronous motor (also known as induction

motor).Is it convenient to use,reliable operation,low cost,firm structure,but power factor is low,speed is also more difficult.220v ac electric motors The large capacity of low speed synchronous motor is commonly used engine motor motor (see synchronous motor).Synchronous motor power factor is high,and its speed has nothing to do with the size of the load,only depends on the power grid frequency.Work more stable.In wide scope use dc motor speed control occasions.But it has a commutator,the structure is complex,expensive,maintenance difficulties,not suitable for bad environment.Since the 1970 s,with the development of Motor vehicle power electronic technology,ac motor speed control technology is mature,equipment increasingly lower prices,already applied.

Motor work in the prescribed format (continuous duty system,short-time duty system,intermittent cycle) can assume and will not cause the maximum output mechanical power of the motor overheating is called its rated power,should pay attention to when using the provisions of the nameplate.Must be noticed when the motor running to make it match the load characteristics and the characteristics of the motor,avoid www.facebook.com/guohong.trading coasters or shut down.Electric function provides a large range of power,class from milliwatts to kilowatts.The use of the motor and control is very convenient and has since starting,acceleration,braking,reverse and stopper live ability,can meet various operation requirements; The work efficiency of the motor is higher,and without dust,smell,no pollution,noise is small.Because of its series of advantages,so in industrial and agricultural production,transportation,national defense,commercial and household appliances,medical electrical equipment and so on various aspects are widely used.General 220v ac electric motors motor drive its output power will change with the rotational speed.

The cause of the three-phase asynchronous motor burn machine

The cause of the three-phase asynchronous motor burn machine can be divided into; Load, power supply, electrical insulation, lack of phase Power supply: add load under the condition of rated voltage is too low, current increase, motor overheating. The power supply voltage is too high, burning machine. Or motor open phase running. This kind of situation is less, is easy to determine, mainly the line with traces www.dongfeng-motor.com of burning. Load) : more than load operation, leading to a motor fever. Or frequent motor start, causing the motor overheating. This opportunity to burn motor will be blackened on both ends of the inner stator, the blackened parts was homogeneous (general motors has a fixed operating power, three phase generator call it the rated power and unit for tile, if under certain circumstances make up more than the actual use of power of the motor rated power, has described the phenomenon as motor overload). Insulation: motor internal insulation does not accord with a standard, existence and turn-to-turn short circuit. Or internal wiring error. This burning machine and sometimes confusing overload burning machine, stator can also be blackened, but in the short circuit parts will have obvious burn marks, such as copper lutetium will appear sometimes. The local severe burn winding. Lacks burning machine is: 1, the motor is star (Y) connection: there are two phase winding will burn, can use a megger (shaking table) to measure the two phase winding insulation damage. In short: if the motor is because of lack of phase and to burn, there will be a winding is not burned, if because of the heavy load and motor burn is full of three-phase motor winding insulation damage. 2, the motor is delta connection: will burn off only one phase winding, can use a megger (shaking table) to measure the phase winding 8500w gasoline generator insulation damage.