How to choose and switch

high efficiency high power electric motor Y2 motor

Specifications
1. effiency: IE2 and IE1 
2. 20 years manufacturing experience 
3. 12 months guarantee 

4. low noise and vibtration
Switches as the main equipment of the network connection, determines the performance and stability of the network itself. Along with the company size is different, the structure of the network also has the very big difference, the switch must also depends on the specific circumstances, but in order to make the company can undertake a large number of network data transmission and lasting stable running safely, must choose to comply with the 3 phase ac induction motor performance of the conditions and price appropriate switches. Personally, electric motor parts I engaged in this work for a while, the technology and properties of the current switch has some basic views, the hope can give you some reference: Switches in recent years there are a lot of new technology, some technology is very useful. (1), Trunking, Trunking technology can be without changing the existing network equipment and wiring of the original conditions, multiple low bandwidth will switch ports bundled into a high bandwidth link exchange, through several port link load balancing, avoiding the phenomenon of link congestion. In the part of the company's network backbone equipment can use this technology: the network traffic is bigger, but actual condition is not allowed to use under the condition of cable, using Trunking can solve the bottleneck problem of data transmission. Induction motor (2), the third layer switch based on the development of the fourth layer switches. This is a relatively new feature, introduce in detail here.

Switch function three

gost motor 7.5kw

Specifications
1. effiency: IE2 and IE1 
2. 20 years manufacturing experience 
3. 12 months guarantee 

4. low noise and vibtration
Switches can be carried out at the same time between multiple ports for data transfer. Each port can be regarded as independent segment, connected to the network device alone enjoy full bandwidth, do not need to compete with ANP gost motor other equipment to use. When the node A to node D send data, node B can send data to the node C at the same time, and it all has two transmission network bandwidth, have their own virtual connection. If used here is 10 MBPS Ethernet switch, electric motor price the switch at this moment in circulation is equal to 2 x 10 MBPS = 20 MBPS, while using 10 MBPS Shared HUB, a HUB in circulation will not exceed 10 MBPS. Anyhow, switch is a kind of based on MAC address recognition, can finish the package forwarding packets function of network equipment. Switches can "learn" MAC address, and keep it in the internal address table, Single phase motor through between the originator of a data frame and target receivers to establish a temporary switching path, make the data frame directly by the source address to reach the destination address.

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.

The classification and characteristics of ac regulated power supply

Able to provide a stable voltage and frequency of power supply according to ac regulated power supply.At present most domestic manufacturers is the work done by ac voltage stability.Below the market some ac regulated power supply,the classification characteristics. motor vehicle spare parts Parameter adjustment (resonance):this kind of regulated power supply,voltage stability is the basic principle of LC series resonance,the early type of magnetic saturation voltage stabilizer is belong to this category.It has the advantage of simple structure,without many of the components,reliability is quite high ac electric motor voltage range is wide,strong anti-jamming and resistance to overload ability.The disadvantage is that large energy consumption,noise big,bulky and high cost.On the basis of the principle of magnetic saturation of development into the formation parameters voltage stabilizer and China have been popular in the 50 s of "magnetic amplifier gather digital ac voltage stabilizer" (614) are the principle of ac voltage stabilizer.Autoformer (than) gather: 1,mechanical pressure regulating type,i.e.,according to the servo motor to drive the carbon brushes in autotransformer winding sliding surface move,change Vo on the ratio of the Vi,in order to realize the adjustment of the output voltage and stability.

The voltage stabilizer can from several hundred to several kilowatts.It is characterized by simple structure,low cost,the output waveform distortion small; But because the carbon brush sliding contact are prone to edm,brush damage that burned and failure; Slow speed and voltage regulation.Type 2,change the tap,autotransformer to make multiple fixed tap,through a relay or SCR (SSR) as switch machine 10,automatically change the tap position,so as to realize the stability of output voltage.This type of circuit voltage regulator the method is simple,wide voltage stabilizing range (130 v to 280 v),high efficiency (95%) or higher,the price is low.While the disadvantage is that low voltage stabilizing precision (plus or minus 8 ~ 10%) working life is short,it is suitable for the family to the air conditioner power supply.Power voltage compensation type electrical motor - purifying type (including precise voltage stabilizer) it USES compensation link to realize the output voltage stability,easy to implement microcomputer control.It has the advantage of good anti-jamming performance,high precision voltage (+ / - 1%) or less,fast response (40 ~ 60 ms),simple circuit,reliable operation.

The disadvantage is that: with the computer,program-controlled switches,such as nonlinear load are low frequency oscillation phenomenon; Input side current distortion degree is big,the source power factor is low; The output voltage to input voltage phase shift.Against interference function to demand higher units,it is advisable to apply in the city,computer power supply,must choose the computer about 2 to 3 times the total power voltage regulator to use.Because has stabilized,anti-jamming,the advantages of fast response speed,moderate price,so widely used.Switching regulated power supply: it is applied to the high frequency pulse width modulation technology,and it is the difference between general switch power supply output must be with the input side of the same frequency and phase ac voltage.It had quasi square wave output voltage wave type,type of ladder wave,sine wave,etc.,in the market for uninterruptible power supply (UPS) from the storage power supplies and chargers,ac voltage regulator is a switch mode power supply voltage regulator and control function is strong,easy to realize intelligent,is a very promising ac regulated power supply.But because of its circuit www.facebook.com/dongfeng.motor is complex,the price is higher,so to promote more slowly.

Trapezoidal wave type in phase one

 Brushless motor driven trapezoidal wave control mode of the frame. motor parts Here a PI control circuit is used to to control current. We use the actual measurement of the current demand and current comparison, get a deviation signal. This deviation signal through the integral and magnified and produce an output correction value, the deviation value is used to reduce the error. This spare parts produced by P - I control loop correction value through PWM setting, then to provide output bridge road. The purpose of this procedure is to ensure that any of the current in the coil remained stable state. Change of phase current control part without any contact. Motor hall sensor in fan motor the wholesalemotor.blogspot.com position signal is used to choose which a pair of coil way need to pass to current corresponding to the output of the bridge, while the other bridge road keep current status. Current sensing circuit is mainly used to real-time current of electric coil, and the feedback signals to the current control loop.

IRMCF341 in the application of variable frequency electrical appliances

 IRMCF341 international rectifier (IR) in the United States new sensorless control for variable frequency electrical appliances application of high performance low cost motor control IC. It adopts the most advanced based on the motor vehicle spare parts magnetic field orientation vector control technology, using the single resistance current sampling the motor can be realized in three phase current refactoring, so as to realize the FOC current loop and speed AC synchronous generator loop, double closed-loop vector control, drive mode for 180 degrees of sine wave. IRMCF341 contains two high-performance processing engine, one is 8 bits high- speed 8051 cores, generator set spare parts the other one is to control the motor sensorless control of 16 engines (MCE). 8051 nuclear execution speed for every two system clock an instruction (such as: 60 MIPS @ 120 MHZ system clock). 8051 nuclear and MCE processor: by dual port RAM data exchange between so as to realize the function of data monitoring and command input. 


MCE contains all the necessary based on hardware circuit control motor control resources, such as PI regulator, vector rotation, Angle estimator, multiplication/divider, low loss of SVPWM, and single resistance current sampling/restructuring, and so on. Sensorless control algorithm of the key elements of complex (such as: Angle estimator) all have defined acmotortrading.blogspot.com control module, the user can through the use of the seamless connection with MATLAB/SIMULINK environment graphical compiler to design your own motor control algorithm (in MATLAB/SIMULINK environment by connecting the modules function module and compiles). 8051 code simulation and debugging can be through a third party based on JTAG mouth debugging tools to complete. Procedure in 51 IRMCF341 memory to 48 k RAM, packaging form for small QFP64 lead-free packaging.

Motor common fault analysis and maintenance - electrical fault

Electrical failure of the stator windings without phase operation,the reverse of the stator winding unbalanced three phase current,winding short circuit and grounding,heating winding and rotor broken bar,open circuit,etc.Lack of phase operation is one of the common faults.As long as there is a phase in the asynchronous motor three-phase power supply circuit can cause motor open phase running.Lack of phase operation may be due to line fuse melt fuse,switch contact or wire connector causes such as poor contact.When the power is short of a three-phase motor phase,such as in stop state,due to the synthesis of zero torque and blocked,the inability to start).The locked-rotor currents of the motor current is much larger than normal work.Apply generator generator set power,therefore,in this case the time is too long or more frequent start turning on the power supply will lead to motor burn down.

Running motor is short of a phase,such as load torque is small,still can maintain operation,only speed decreases slightly,and abnormal noise; When the loads,the operation time is too long,will make the motor winding burn.Three-phase winding fore and electricalmotor1.blogspot.com aft misconnect when,after turning on the power supply will be three phase current serious imbalance,reduced jumps,vibration,temperature rise of the rotating speed,the phenomenon such as voice radically.If not protection device,it is easy to burn out motor winding,so must see first,tail motor wire end,before electricity operation.Three phase current unbalance fault,often caused by motor external power supply voltage imbalance,the motor parts internal reason mainly is the winding interturn short circuit or in motor rewind coil number of turns or wiring errors when repaired.Winding grounding and short circuit current is too large.Ground fault available megohmmeter.Can reduce in the stator winding voltage short-circuit fault case,judged by measuring the current,can also measure the dc resistance to judgment.

Frequency conversion air conditioning really save electricity?

First,the frequency conversion air conditioning really save electricity,frequency conversion air

conditioning energy saving principle 1.The principle of frequency conversion air conditioning is air conditioning adopted more advanced 220v ac electric motor stechnology,the startup voltage is small,but under the condition of low voltage and low temperature start,that www.dongfeng-motor.com in some areas due to the low voltage instability or winter indoor temperature and air conditioning,it is hard to start a certain improvement effect.Due to realize the stepless variable speed compressor,it can also adapt to more widespread refrigeration and heating demand.2.Simply put on the principle of frequency conversion air conditioning is in the structure of conventional permanent magnet motors for saleair conditioning increased by a frequency converter.

The heart of the air conditioning compressor,its speed directly affects the efficiency of the use of air

conditioning,frequency conversion air conditioning inverter is used to control and adjust the

compressor speed control system,make it always in the best state of rotational speed,thus,improve the

energy efficiency ratio is larger than that of conventional air conditioning energy saving 20% ~

30%.Second,the frequency conversion air conditioning really save electricity,high frequency operation

more efficient 1.The frequency conversion air conditioning in addition to just boot with high

frequency operation,other operating at low frequency,most of the time consumed power is far less than the air conditioning that decide frequency.Compressor is Motor vehicle a large energy consumption of air conditioning,its rated output accounted for about 90% of the air conditioning machine power,the other 10% for fan motor and other electric parts;The frequency conversion air conditioning compressor

efficiency is higher than the ordinary air conditioning that decide frequency compressor.2.The number of frequency conversion air conditioning open stop is much lower than that of the air conditioning that decide frequency switching frequency,the air conditioning that decide frequency boot will consume a lot of energy.Ac frequency conversion air conditioning than the air conditioning that decide frequency to save electricity by 30%,while dc frequency conversion air conditioning power saving 50%.

The main structure of a generator?

Generators are usually made of stator and rotor,end cover and bearing components.By the stator core,stator line winding,stand electric motors price and 220v electric motorfixed the parts of other structures.Rotor by the rotor core (or a magnetic pole,the conjugate) winding,12v motor retaining

rings,acmotortrading.blogspot.com central ring,slip ring,fan and shaft parts.By bearing and end cover of generator stator and rotor connected together,can make the rotor spinning in the stator,do the exercise cutting lines,thus induced potential,through terminal lead,in the circuit,the electric current is produced.

Hot summer, the motor running problems should be paid attention to

In the operation of the motor in the hot summer work should pay attention to the following: 1, monitoring the power supply voltage change in voltage should not be more than or less than 10% of the rated voltage range, if lower than this range, should be appropriately reduced load operation. At the same time, the three-phase voltage imbalance also cannot too much. The difference of any two phase voltage should not exceed 5%, otherwise will make motor fever too fast. Motor power are best a voltmeter and switch directly to monitor. 2, monitors the running motor current Under normal circumstances operation shall not exceed the nameplate rating. Also should pay attention to whether the three phase current balance and any two interphase current difference should not be more than 10% of the rated current, otherwise the motor has a fault. Particular attention to whether there is a lack of phase operation. Shall furnish ammeter monitoring of large capacity motor running current, capacity should also be smaller motor line current is measured with a clip-on ammeter at any time. 3, monitoring the temperature of the motor The temperature rise shall not exceed allow the limits of the motor nameplate. In operation of the motor temperature rise is monitoring the motor running condition of direct and reliable way. 

Check the temperature rise method can refer to the 144 q. Online road furnish voltmeter, ammeter, and overload protection device, also is Motor vehicle the main way to monitor the temperature rise. 4, monitor the motor running in induction motor price the noise, vibration and smell when the motor running, voice even, smooth operation, insulating paint smell and the smell. In case of abnormal noise, vibration, insulating paint smell, etc., that motor overheating or other failures. 5, surveillance gear work To watch if there's any loose for pulley or coupling, transmission belt with and without sliding phenomenon (sliding belt is too loose), belt joint are in good condition. 6, monitor the condition of the bearing Pay attention to the bearing noise and fever. When using a thermometer to measure, rolling bearing heating temperature not over 95 ℃, sliding bearing heating temperature not over 80 ℃. Bearing abnormal sound or overheating, is poor lubrication bearing, wear and tear caused by severe. 7, monitor the condition of the fuse Should always pay attention to whether there is a photograph of blown fuse, lest cause lack of phase operation make the motor overheating. In a word, the motor in the process of running, monitoring the current, the change of temperature, found problems in a timely manner.