The inverter no-load current is greater than the load current

Stator Motors Rotor 

Specifications
1. 20 years manufacturing experience 
2. competitive price,high quality 

3. Brand Name: FUJIAN DONGFENG MACHINERY ELECTRICAL LIABILITY CO., LTD

A 75 kw micro can WIN - G9 inverter commissioning the strange phenomenon Cause: a cement plant users to send a 75 kw can WIN - G9 frequency converter, the cause of the problem is, in the operation of the fire smoke in the inverter, the inverter downtime. Check, the power input circuit of the machine for three phase half controlled bridge, using the principle of controlled rectifier, on the main loop of the dc energy storage capacitor "soft power" and save the small power inverter commonly used rechargeable contactor. In fact half controlled bridge in this here is equivalent to non-contact soft blunt electricity switch. Inspection found that one of the thyristor module electrical motor 12v 1000w terminals have obvious signs of flashover arc burning, but the measurement is not short circuit. Found in the disassembly easily fixed nut landed, flashover reason seems to be a connecting screw loose, causing poor contact. The module for a combination of a diode and a one-way thyristor. And then check the control panel and inverter main circuit, without exception. The module, more than two phase half controlled bridge as the ac electric motor power input, after power on, with a small power 2.2 kW three-phase motor, feel no problem, switch to the new module after a same model, then to the site for installation. 


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

Precaution, first will run to 5 hz frequency, frequency converter load as a fan, motor connector off first, make the motor no-load running. This trial run, got a fright! Frequency at 5 hz, no-load running current 45 a, although feel slightly larger, but consider for a possible repair, or frequency converter for motor winding parameters such as starting curve or torque compensation made adjustment caused by waiting for a reason, without notice. When up to 10 hz inverter panel shows the current and the output current is measured with clip-on table, have reached the 100 a! And the oscillation amplitude of the output current is great, but test the three-phase output voltage, about 70 v, balanced and stable. The motor cable release, electric logging on the inverter output, output frequency 10 hz, the output voltage is 70 v, 20 hz to 150 v, 35 hz to 250 v, after decreasing with frequency, to 50 hz, 400 v. In this process, the measurement of three-phase output voltage balance is very good. The inverter output of V/F curve electricalmotor1.blogspot.com accords with quadratic load torque characteristics. No problem. Output voltage balance and stability, and the output current is too large and the current volatility, obviously for the load caused by abnormal. This is lead to the conclusion of conventional judgment.

Frequency conversion air conditioning inverter motherboard power supply

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

Air-conditioning outdoor mainboard work power supplied with switching power supply, motherboard + 12 v and + 5 v power supply circuit. Mainly generator set spare parts for outdoor electrical relay (led outdoor power supply is no longer PTC but straight), fan control relay, four-way valve control relay to motor parts provide power supply. The main working voltage for outdoor CPU. Therefore, wholesalemotor.blogspot.com only the frequency conversion lamination power circuit of switching power supply work, to make the control of outdoor work, can maintain normal CPU communication between inside and outside the machine. 

Brushless motor

Permanent magnet brushless motor is mainly composed of rotation (rotor) and three set of uniform distribution of the coil (stator), surrounded by a coil of the stator is fixed on the outside. Current flows through the coil magnetic field, three groups of overlay each other to form a magnetic field vector field. electric motor 12v 500w By respectively control the size of three groups on the coil current, we creates an arbitrary direction and magnitude of stator magnetic field. At the same time, through the attraction and repulsion between the stator and rotor magnetic field and torque can be controlled freely. For the arbitrary Angle of rotor and stator are an optimization of the magnetic field direction, can produce a maximum torque; Also, the stator can produce a magnetic generator set spare parts field direction of the torque output. Simply put, if the stator magnetic field generated and permanent magnet rotor magnetic field direction, motor will not output any moment. 

In this case, there are two magnetic field motor electric force of each other, but because of the force direction of rotation and the rotor, so the two magnetic field makes the bearing pressure, have not generated any rotary force. On the other hand, if the stator magnetic field direction orthogonal to the rotor magnetic field direction, it will wholesalemotor.blogspot.com generate a force to the rotor rotation, and this is also the location of the maximum torque. Any direction and size of the stator magnetic field can be divided into parallel and perpendicular to the two components of the rotor magnetic field direction. Such, mutually orthogonal magnetic field to produce rotary force, and parallel magnetic field is produced on the bearing pressure. For this reason, an efficient brushless motor driven function is to reduce the magnetic field of parallel to each other and to maximize the mutually orthogonal magnetic fields.

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.

Pump and fan vane

Pump and fan is to use plus can denier conveying fluid permanent magnet motor fluid machinery.They are widely used in gas and heating and ventilation.According to the working principle of pump and fan,usually they can be classified as follows:Vane pump and the fan motor run capacitor is rotating,the main structure fixed casing and impeller blade.Of fluid work through the rotation of the impeller,allowing fluid to diesel generating gain energy.According to the fluid flow conditions,they then can be divided into the following several kinds: 1.wholesalemotor.blogspot.com The centrifugal pump and fan;2.Axial flow pump and fan;3.The mixed flow pump and fan,the fan is a combination of the first two.4.Tubular fan.

Motor nameplate data and rating

Model:the series of varieties,the performance of the motor,protective structures,such as rotor type rotor and stator product code.Rated power:it means the runtime on the output mechanical power rating of the motor shaft,unit KW or HP,1 HP = 0.736 KW. Voltage:directly to the line on the stator winding voltage (V),the motor has two kinds of Y and delta connection,the connection shall be consistent with connection of regulation of motor nameplates,to ensure that corresponding to the rated voltage.

Current:motor under rated voltage and rated frequency,and www.dongfeng-

motor.com the output power rating of the stator winding current of three-phase line Frequency motor,which refer to gasoline generator spare partsconnect the ac power frequency of 50 hz+1 Chinese regulations Speed:motor under the rated voltage,rated frequency,rated load,motor speed (r/min) per minute; The generator stator 2 pole motor synchronous speed is 2880 / min.The duration of the work quota:refers to the motor running.Insulation class:the level of motor insulation materials,decided to allow temperature rise of the motor.Standard number:said design motor technical documents basis.Excitation voltage:refers to the synchronous motor excitation voltage (V) when the rated work.Field current:refers to the synchronous motor excitation current (A) when the rated work.

High efficiency motor energy saving effect is remarkable Huge market upside

Efficient motor is refers to the general standard motor has high efficiency.Efficient motor using new motor design,new technology and new materials,by reducing the wastage of the electromagnetic energy,heat energy and mechanical energy,improve the output efficiency.Compared with the standard motor,motor using efficient energy-saving effect is very obvious,normally efficiency can be increased by 4% on average.Figures show that China's industrial production of energy waste is serious,the motor power consumption accounts for 64% of the total electricity consumption in our country,based on the analysis of domestic motor application,most still ac electric motor is given priority to with ordinary motor,represented by efficient motor energy saving products market space is huge.Efficient motor is refers to the general standard motor has high efficiency.Efficient motor using new motor design,new technology and new materials,by reducing the wastage of the electromagnetic energy,heat energy and mechanical energy,improve the output efficiency.Compared with the standard motor,motor using efficient energy-saving effect is very obvious,normally efficiency can be increased by 4% on average.

Statistics show that's about 1.7 billion kilowatts,annual power consumption of about 3 trillion KWH,motor power consumption accounted for 64% of China's total power consumption,industrial electricity 75% efficient motor in domestic existing stock motor proportion less than 5%,the production of high efficiency motors are mainly sold to electric motorforeign countries.At the same time,the application of highly efficient motor in China at present is only 23% ~ 23%.Although our country in 2008 will be included in motor system energy saving country one of the ten major energy conservation projects,www.dongfeng- motor.com 2009 also include high efficiency,super efficient motor application in huimin engineering,June 2,2010,according to the notice will be highly efficient motor in energy-saving products huimin project scope,make efficient motor marketing focus.Embarrassing situation is that the high efficient motor has promotion on the market for many years,high efficiency motor has not fully integrated into the market,at present efficient motor proportion is still relatively low.Efficient motor research and development in our country basic keep pace with the international level,the technical progress in recent years,very optimistic,especially on the motor efficiency and abroad there is no difference.

But it is a pity that our country produce IE3 motors domestic application of too little,most for export.Domestic well-known motor expert member of ren-yuan tang said.Statistics from the ministry of industry and information technology,according to the current domestic with motor in efficient accounted for only about 5%.To solve the problem of efficient motor in domestic promotion difficult,China's government departments to the New Deal is constantly,in order to promote the development of industry.Energy efficiency standards 2012 China once in order to speed up the promotion of high efficiency motor,organized to GB18613-2006 "the small and medium-sized three-phase asynchronous motor limited value of energy efficiency and energy efficiency rating" revision,completed by China standardization institute and other units of the new GB18613-2012 "the small and medium-sized three-phase asynchronous motor limited value of energy efficiency and energy efficiency rating" countries have released in May 2012,and on September 1,2012.

After implementation,the standard of energy efficiency products will be banned from production,sales of

imports."2013 special action plan for energy saving and green industrial development from the miit on

IE2/IE3 electric motor March 26,issued by the 2013 industrial energy saving and green development action plan for special notice,in 2013 will focus on promoting the implementation of motor efficiency under special plans.: special action to implement goals so as to realize the national industrial power saving 1% (30 billion degrees),explore the development patterns and industrial energy saving and green,implementation to point with surface,drive the industrial energy saving and comprehensive utilization of the whole work progress.In 2013,according to plan,miit will from the promotion of efficient motor,eliminate inefficiencies and both the motor system energy saving technical reconstruction in six aspects,such as promotion,elimination and 100 million kw motor and motor system,the reform more efficient motor market,promote the motor product upgrading and industrial upgrading.

lamination electric motor spare parts

In recent years,rope machine mechanical industry developing rapidly,rope machinery manufacturing

enterprises in China has developed quite rapidly,large and small enterprises has arisen.Rope

machinery development will bring many convenience to people's life.In today's society,is suitable for

processing a sword hemp fibers as raw material of rope machine,also suitable for processing with

other natural fiber or synthetic fiber as raw material of rope machine,for the people acmotortrading.blogspot.com has greatly increased the production efficiency.Rope machine,including the frame and installed on the base of the conveying mechanism,closing mechanism,motivation mechanism,conveying mechanism by central axis,synchronous transmission gear train no.1,left,right,square plate and arrangement between left and right square frame board four line tray,closing mechanism by the rope,accept,pendulum string axis,one traction rope shaft axis,the no.2 traction axis,horizontal bevel gear,shaft bevel gear,bearing,bearing right and left 2 synchronous transmission gear train,dynamic mechanism is composed of motor and pulley drive,motor to drive through the belt pulley,deputy and number one and number two synchronous transmission gear train connection,a synchronous transmission gear train drive conveying mechanism to complete the pay-off.

2 synchronous transmission gear train drive the closing mechanism complete the rope and the rope,the fully automatic rope machine,automatic line,the machine can produce two strands of rope,rope three or four strands of rope,high production efficiency,product quality is good,save time,save work,and effort.Rope of the necessary conditions Explain when we are in use today or should pay attention to about the rope mechanical conditions: 1,the first rope machine model according to the class,type classification principle.In block letters with Chinese pinyin "said class of rope machine,model code,if there are repeated,expressed by two typical Chinese pinyin",expressed in the main parameters of generator parts stator rope machine structural characteristics.This kind of product is behind the main parameters of filling series,the main parameters and the serial number with a dash between links. 2,the design of rope machine should conform to the technical requirements of rope process,rational layout,elegant shape,6v electric motor reliable performance,simple operation,designed so that it would be easy to repair when failure occurs,can improve the high seriation,generalization and standardization level,rope machine should be in accordance with the prescribed procedures approval of drawings and technical documents manufacturing; 3,rope machine power and control devices and to ensure that basic performance of rope machine accessories and the use of special tools shall be issued by factory to install,and then supply. 4,the last rope machine should not have the appearance of the surface pattern without obvious bulge,sag,rough and other damage defects,such as rope machine lacquer layer should be uniform color,as long as after reaching the above basic conditions,rope machine can use better.