Indoor machine control circuit principle

Y series totally enclosed protect Asynchronous 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

47 c862an special chip indoor machine control circuit adopts frequency conversion air conditioning - Gc5l. The chip single phase motor price inside besides writing special air conditioner program, also contains a microprocessor, program memory, data memory, CPU, input and output interface and timing counter Induction motor circuit and other circuit computation and comparison of wholesalemotor.blogspot.com input signal, on the lamination basis of the result of the operation and compare of separate-bodied air-conditioners, fans, timing, cooling, heating and wetted condition control.

PLC control two pump start-up failure solutions to problems

 Situation:in the double liang steam double-effect lithium bromide absorption air-conditioning unit,the use of omron PLC (PA204S C200HE-CPU42,power supply) to control the start of two pumps. When,in turn,start the two pumps,often led to the suspension of the power of the PLC,thus stop running program.Second,the detection of 1,use the meter to measure the voltage electric motor 12v 500w waveform of two pump ordinal startup PLC power PA204S ac voltage of the power supply change found:when did not start the electrical motor 12v 1000w pump,the voltage of the power supply is normal,when start the two pumps,instantaneous fell to the power supply voltage of 184 v,184 v and the duration of the above 25 ms,PLC to stop working,and to determine the effect of pump power of PLC.2,in order to solve this problem,respectively for the following tests: A) driving the pump first,delay around 10 s to start small pump,power supply voltage drop to about 190 v,the instructions first,pump makes instantaneous voltage drops,later start small pump,affect smaller,but it need to modify the PLC program.

B) because the pump power supply is turned by high tension line through a transformer,transformer capacity,can be considered a large capacity of transformer,may make the pump will be smaller influence on the PLC power supply voltage.C) in the PLC power supply termination a large capacitance,but the effect is not obvious.D) finally in one power supply transformer converted by a 220 v power supply to PLC,found that even in the start two pumps at the same time,PLC power supply voltage drop is only about 204 v,204 v,the can.Conclusion:as a result acmotortrading.blogspot.com of the PLC power supply is supplied with water pump in the same way,and the plant's transformer capacity is small,so in the start two pumps,caused the PLC power supply voltage drops below 85% of rated voltage,and duration of more than 10 ms,resulting in PLC detected power interruption,stop working. So the advice from the transformer converted one by one in the 220 v power to separate for PLC,which can solve the problem.

Motor points for attention

(1) before disassembly,should surface dust with compressed magnet generator air blowing off the motor,and scraped clean surface dirt.2 choose motor working place,the disintegration of the clean up the scene environment.(3) familiar with acmotor2.blogspot.com the motor structure characteristics and maintenance technical requirements.(4) ready to collapse the required tools and equipment (including special tools).5] in 220v electric motor order to further understand the defects of the motor running,conditional when can do an inspection test before disassembly.For this,turn motor with load test,the detailed check parts,such as temperature,sound,vibration motor,and test the voltage,current,speed,etc.,and then disconnect the load,do a no-load check test,no-load loss and no-load current is measured and recorded.

[6] to cut off the power supply,electrical wiring to remove,recorded.Once the appropriate voltage test motor insulation resistance by megger are.Maintenance in order to keep pace with electric motors price The Times when measured insulation resistance compared to determine the motor insulation change trend and insulating state,should be measured under different temperature insulation resistance value of the conversion to the same temperature,the average conversion to 75 ℃ .Being tested to absorb than K.When the absorption ratio greater than 1.33,which indicates that the motor insulation or degree of be affected with damp be affected with damp be affected with damp be affected with damp or not serious.In order to compare with previous data,also want to add any temperature measured absorption than the conversion to the same temperature.

Low voltage circuit breaker H series and three series of ve

1) H series:H series is the introduction of American Westinghouse technology products,suitable for

power distribution,electrical control line can be used in normal working conditions not frequent

transformation.5) 3 ve series:3 ve series is the introduction of German electric motor 12v 500w Siemens company technology manufacturing products,domestic code-named DZ108.In electrical control circuit is used in the motor overload protection,short circuit protection,plus accessories,also can carry on remote control and

protection.3 ve series annotation type as mini electric motor follows:(1) 3 v is circuit breaker code;(2) use the category code (E-type motor protection,N-only short circuit protection,A-only overload protection,T-type distribution protection);(3) basic specifications codes (1-20 a,3,32 a,4,63 a).(4) auxiliary contacts of 3 digit code (005-3 ve1 without auxiliary contacts,015-3 ve1 auxiliary contact,a normally open normally closed,025-3 ve1 auxiliary contacts,two normally open,035-3 ve1 auxiliary contacts,wholesalemotor.blogspot.com two normally closed,000-3 ve3 without auxiliary contacts,200-3 ve4 without auxiliary contacts).(5) the trip

current setting range code (case 2 bu-3 ve1,trip current setting range of 0.1 ac electric motor ~ 0.16 A,ma 2-3 ve3,trip current setting range for 10 to 16 A,CL-3 ve4,trip current setting range of 6.3 ~ 10 A,etc.).

Structure and working principle of the generator is what?

Generators are usually made of stator and rotor,end cover and bearing

www.facebook.com/guohong.trading components.By the stator core,stator line

winding,stand and fixed the parts of other structures.Rotor by the rotor core (or a magnetic pole,the

conjugate) 220v electric motor winding,retaining rings,central ring,slip ring,fan and shaft parts.The generator rotor rotate by the prime mover,when direct current (dc) after the rotor winding for carbon brush and slip ring access,rotor can produce magnetic fields.Due to the rotor is constantly perkins diesel generator rotating,so the diesel generator magnetic field is a rotating magnetic field,it and the relative motion is formed between the stillness of the stator winding,equivalent to the stator winding in constant cutting lines,and will in the stator winding induction electromotive force.The direction of the induced electromotive force of the stator,is decided by the right-hand rule.For Ren Yigen of coil wire,in the process of the rotation of the rotor,sometimes N pole toward it,S very on it,sometimes different

polarity in the winding induction electric potential orientation is not the same.Back and forth

direction change,this is an alternating current.

The cause of the three-phase asynchronous motor can't start

1),2) didn't plug in,blown fuse 3),4) circuit,stator winding of the stator or rotor winding grounding

5),and stator winding short circuit 6),7) of the stator winding wiring error,overload acmotortrading.blogspot.com or mechanical transmission was crushed loose article 8),the rotor copper 9),no oil in the bearing,axis due to heat expansion,obstruction in the bearing rotating 10) wrong wiring,control equipment or damage to the 11),over-current relay size 12),old starting switch oil cup of gasoline generator spare parts oil,13),wound rotor type motor starting operation error 14),wound rotor type motor rotor resistance with 15),bearing damage Three-phase asynchronous motor can't start many factors,a detailed analysis should be done according to Motor vehicleac tual condition and symptoms,carefully check,can't get to start for many times,especially when the starter motor when abnormal noise or overheating,should immediately cut off the power supply,after find out the reason and rule out any 220v ac electric motors starting,in case of failure to expand.

Programmable controller

(PLC) and its application of relay contactor control system is widely used in production for a long

time,but because of its complex mechanical contact more,wiring,High reliability,low power

consumption,and when the production process changes need to be redesigned 6v electric motor and control circuit,versatility and flexibility is poor,so can't satisfy increasingly The complicated and

changeable modern production process control requirements.And the programmable controller will relay contactor control combined with computer technology,the advantages of using "software Cheng "instead of the relay contactor control" hardware wiring ".When the system function need single phase induction motor to be changed,just change a few external connection,mainly by modifying the corresponding control procedures Can.Using PLC to replace the ordinary relay circuit to realize Y/Δ starter will be more convenient and reliable,to solve the above problems are also more easily.PLC (programmable Controller) is a kind of microcomputer technology as the core of the automatic control device,is superior to other control device of acmotortrading.blogspot.com many functions,such as:(1) high reliability and anti-interference ability Strong;Variable,(2) the control program can achieve flexible control;(3) control and processing function is perfect (analog input P output,PID control,arithmetic,etc.);(4) network and communication functions (configure the network adapter or can communication card and network or other communication controller),etc.When USES the PLC control ac asynchronous motor,it Are better able to realize logic control,process control and data communication,to achieve automatic control of a new level.

With a brush brushless

Brushless dc motor is composed of stator main body of the motor and drive, is a

typical mechatronics product. The stator winding of the motor to make more balanced three-phase y

connection, With three phase asynchronous motor is electrical motor 24v very similar. On the rotor of the motor with the magnetization of the permanent magnet has, in order to detect the polarity of the motor rotor, inside the motor is equipped with position sensing Device.

Drive consists of power electronic devices and integrated circuit, its function is: accept the motor

start, stop, brake signal, to control the start and stop of the motor Check and brake; Accept the

position sensor signals and positive &negative, used to control the inverter bridge on and off of

each power tube produce continuous torque; Accept the speed instruction and feedback Signal, which is used to control and adjust the speed; To provide protection and display, and so on. Because of brushless dc motor based on self-control type operation, so don't like frequency control of motor

speed synchronous motor overload start under plus startup winding on the www.dongfeng-

motor.comrotor, also do not When the load mutation generate oscillation and step out.

Medium and small capacity of the permanent magnet brushless dc motor (BLDCM), now more than using high magnetic energy product of rare earth ndfeb material (Nd - Fe - B) Material. As a result, the volume of rare earth permanent magnet brushless motor than three-phase asynchronous motor with capacity reduces a frame number. Nearly thirty years in view of the asynchronous motor frequency control of motor speed Research, in the final analysis is looking for a way to control the asynchronous motor torque, rare earth permanent magnet brushless dc motor is bound to its wide speed range, small volume, high efficiency and steady state Speed and small error characteristics appeared

in the field of speed advantage. Because of brushless dc motor has the characteristics of a dc motor, is also the electrical motor 12v 1000w device of frequency variation, so also known

as straight Flow frequency conversion, the international general term for BLDC) motors running

efficiency of the brushless dc motor, torque at low speed, precision of speed is more good than any

of the control technology of inverter, so value Attention to the industry. The product has

production more than 55 kw, can design to 400 kw, can meet the requirements of industry energy saving

and high performance drive. 

1, fully replace the dc motor speed control, comprehensive alternative, comprehensive alternative to asynchronous motor frequency converter + frequency conversion motor + reducer speed; 2, can run for high power at low speed, can save the reducer direct drive big load; 3, have all the advantages of traditional dc motor, and cancelled the carbon brush and slip ring structure; 4, torque characteristic is excellent, medium and low speed torque performance is good, big start torque, small starting current; 5, stepless speed regulation, wide speed range, strong overload capacity; 6, small volume, light weight, large output; 7, soft and soft stop, good braking performance, saves the original mechanical braking or electromagnetic braking device; 8, high efficiency, no excitation loss and carbon brush motor itself loss, eliminate the multiple reduction consumption, comprehensive energy-saving rate can reach 20% ~ 60%, power saving a year only to recover Cost; 9, high reliability, good stability and strong adaptability, simple maintenance and maintenance; 10, turbulence shock resistance, low noise, little vibration, smooth operation, long service life; 11, no radio interference, does not produce sparks, especially suitable for explosive place, explosion-proof type; 12, according to the needs of optional trapezoidal wave motor and is XuanBo magnetic field magnetic field. 

21 points for attention (1) before disassembly, should surface dust with compressed air blowing off the motor, and scraped perkins diesel generator setclean surface dirt. 2 choose motor working place, the disintegration of the clean up the scene environment. (3) familiar with the motor structure characteristics and maintenance technical requirements. (4) ready to collapse the required tools and equipment (including special tools). 5] in order to further understand the defects of the motor running, conditional when can do an inspection test before disassembly. Therefore, the motor with load test, detailed inspection machine Parts, such as temperature, sound, vibration, and test the voltage, current, speed, etc., and then disconnect the load, do a no-load check test, measure and no-load current No-load loss, recorded. [6] to cut off the power supply, electrical wiring to remove, recorded. Once the appropriate voltage test motor insulation resistance by megger are. Maintenance in order to keep up with The Times when measured insulation resistance compared to judge the trend of change motor insulation and insulation State, different temperature should be measured insulation resistance value conversion to the same temperature, the average conversion to 75 ℃. Being tested to absorb than K. When the absorption ratio greater than 1.33, which indicates that the motor insulation or degree of be affected with damp be affected with damp be affected with damp be affected with damp or not serious. In order to compare with previous data, should will likewise Any temperature measured absorption than the conversion to the same temperature.