2015年1月5日星期一

A permanent magnet ac servo motor


three phase induction electric motor Y series B35 1.5KW 2.2KW 37KW 75KW

Specifications
-One year warranty 
-Within 25 days delivery 

-Life: 5-7 years 
Launched by Japan yaskawa motor manufacture small ac servo motors and drives, the D series is suitable for numerical control diesel engine machine (the maximum speed of 1000 R/min, torque is 0.25 ~ 2.8 N.m), R series is www.facebook.com/guohong.trading suitable for the robot (the maximum speed of 3000 R/min, torque is 0.016 ~ 0.16 N.m). After introduced M, F, S, H, ac synchronous generator C, G six series. In the 1990 s has launched a new D series and R series. Driven by the old series of auto 3 phase induction motor spare parts rectangular wave, 8051 single chip microcomputer control to the sine wave drive, 80 c, 154 CPU and gate array (fpga) chip control, torque fluctuation decreased from 24% to alternator generator 24%, and the and improves reliability. In this way, only a few years time formed eight series (power range of 0.05 ~ 6 kw) is a complete system, to satisfy the diesel generator set working machinery, handling, welding robot and assembly robot, electronic parts, machinery, printing machine, high speed winding machine, winding machine and so on the different needs. Famous for production of machine tool numerical control device of laws that g (Fanuc) companies in Japan, also www.dongfeng- motor.com introduced in the mid - 1980 - S series (13) and L series specifications (5) of permanent magnet ac servo motor. L series diesel engine have smaller moment of inertia and mechanical time constant, this is suitable for fast response requirements of the position servo system.

2015年1月4日星期日

Step-down start



small motor spares suppliers of motor parts 

Specifications
1.20 years fan&motor manufactruer 
2.We can open mould&punch&diecast&finish&winding 

3.competitive price,high quality 
1, autotransformer (also called compensator) step-down start wiring: (1) high pressure side of the autotransformer into power grid, the low voltage side to the motor, there are several different voltage than tap to choose from. (2) features: set autotransformer change ratio of K, the original side voltage of U1, U2 = vice side voltage U1 / generator price K, vice edge current I2 (that is, through the line current of the motor stator winding) also according to the proportion is reduced, and because of I1 = I2 / K, the power supply of the motor starting current is directly 1 / K2 times when it generator is started. 1 / K times due to lower voltage, ac synchronous generator torque reduced to 1 / K2 times. Autotransformer vice edge from two to three groups of tap, such as secondary voltage of primary side voltage respectively 80%, 60%, 40%. Advantages: can auto spare parts be according to allow 3 phase induction motor the starting current and starting torque required for different tap to choose autotransformer achieve step-down start, use Y or Δ stator windings. Weakness: the equipment is big, the investment is more expensive. 


3 Phase induction Electrical Motor MS Series for winding machine

Specifications
ambient temperature:-15 -40 
above sea level : not exceed 1000m 

rated voltage:+-5%
2, star - triangle (Y - Δ) step-down start: (1) wiring startup of the stator into a star, first pick into Δ start over again. (2) the normal operation of the startup. Stator connect Δ alternator generator stator coil Y phase voltage U Δ = line voltage phase current UY = U1N = U Δ phase voltage U1N I Δ = line current IS current IY I Δ = = = IS IS (therefore diesel generator set starting current for direct use Δ connection starting current 1/3) due to the torque IS directly proportional to the square of water pump price the voltage, starting torque only Δ 1/3 connection IS started directly. Advantages: simple equipment, low price. Disadvantages: only when used in normal operation for Δ connection, buck than fixed, have can not meet the requirement of the launch. 3, yanbian triangle. Part which starts the motor stator windings into Y, another part of Δ form. Features: start, each phase winding of voltage, than connect. Full y connection, starting torque is bigger, but the winding structure is relatively complex, application restricted. 4, resistance (or reactance) step-down start. The capacity is not a lot of squirrel cage asynchronous motors can be used in tandem step-down at boot time for the stator circuit resistance (or reactor) to acmotor2.blogspot.com start the motor, to stay at the end of the motor starting resistance (or sub reactor), the resistance on the heat loss, with the reactor volume, the cost is large, this method is seldom used.

Wire and cable, electrical should know some common sense


Must pay attention to the connection 3 phase induction motor is correct and reliable, and the secondary side are not allowed to answer the fuse or switch. Even if for some reason to dismantle the secondary side of the instrument or other devices, also must first to secondary side short circuit, then on again. Low voltage switch is lamination machine refers to under 1 kv isolating switch, circuit breaker, fuse and so on low voltage power distribution equipment controlled by load, must branch out, it is forbidden to more than a brake control and confusion. Low voltage rotor power distribution equipment and interlock of self-provided generator which should be reliable. It is strictly prohibited to bring their own power equipment and power grid parallel operation without permission. Low voltage power distribution equipment around before and after the operation and maintenance of channels should be laid on the insulation pad, piled up other items are strictly prohibited in the channel at the same time. Welding equipment: equipment first, followed by power supply. Dismantle rotor and stator devices: power supply, before equipment. Zero circuit: the first, followed by the line of fire. Down the line: after the first wire, scattered line. 

Low voltage fuse cannot as the motor overload protection. Fuse rated squirrel cage induction motor voltage must be greater than or equal www.facebook.com/dongfeng.motor to the working voltage of power distribution lines. Rated current of the fuse must be greater than rotor or equal to the rated current of the melt. Fuse breaking capacity must be greater than the possible maximum short-circuit current distribution circuit. Melt the selection of rated current, must meet the line normal working current and the starting current of the motor. For electric and lighting load short circuit protection, the rated lamination machine current of the melt is equal to or slightly greater electric generator than the rated current of the load. For single motor, melt rated current (1.5 2.5) or the motor rated permanent magnet generator current melt rated current in the power distribution system, and at a lower level shall coordinate, in order to realize the selective protection purposes. The next level should be smaller than at the next higher level. Ceramic plug fuse should be installed vertically, qualified fuse, must be used in other copper wire, etc. Replace the fuse. Spiral can fuse power into the line on the ac motors center of the base terminal, they can pick up the load for the shell of the screw terminals.

DBJ08-20-98 household electric equipment should meet the following standard

 three phase induction electric motor Y series B35 1.5KW 2.2KW 37KW 75KW
Specifications
-One year warranty 
-Within 25 days delivery 
-Life: 5-7 years
7, balcony should establish artificial water pump lighting. The balcony lighting device, can improve the environment, easy to use. Especially the closed balcony set lighting is necessary. The balcony wear tube Electric motor dark apply flare path. If building embedded at the end, the application of sheath line Ming fu. 8, residential public position must be set of artificial lighting, in addition to the high-rise residential elevator hall and emergency lighting, the rest should use energy-saving switch. Power supply small diesel engine is connected to the public on the meter. According to the fire code, high-rise residential elevator hall and emergency lighting is not diesel generator set closed, so can't use energy-saving three phase induction motor single phase induction motor switch. 9, houses should be equipped with line TV system, its equipment and wiring should meet the requirements of cable diesel generator set networks, a small set of household should set terminal box of a double hole TV system, medium and large set of each set should be not less than two television system double aperture terminal box, terminal box diesel engine side shall have the acmotor2.blogspot.com power outlet. In construction, whether the area cable in place, should have the TV terminal box.

2014年12月28日星期日

Wire and cable, electrical should know some common sense

 iron motor shell motor parts pig casting iron 
Specifications
1.iron or steel 
2.sand casting 
3.ISO,UL,FM,LPCB,VDS,TS16949 
4.timely delivery 
5.reasonable price 
Replacing the melt, must first disconnect the electric equipment, in order to prevent the cause arc fuse line should be water pump installed in each phase. In two phase Water pump line three and three phase four wire loop of neutral line generator price it is forbidden to install fuse fuse is used primarily as a short circuit protection fuse for quarantine purposes, the fuse must be installed in the line head end. Fuse is 3 phase induction motor short circuit protection. Isolated power supply, safety maintenance. Knife switch function is to www.facebook.com/guohong.trading isolate the power and safety maintenance. Rubber cover porcelain bottom knife switch as general electric lighting, electric circuit control 3 phase induction motor switch, also can be used for distribution of branch circuit switch triode rubber cover knife switch when appropriate to reduce capacity can be used to frequent starting motor control switch operation, not three pole rubber cover knife switch power alternator generator supply into line should press into the line on the static contact end seat, electric equipment below the outlet of a fuse. 


3 Phase induction Electrical Motor MS Series for winding machine
Specifications
ambient temperature:-15 -40 
above sea level : not exceed 1000m 

rated voltage:+-5% 
Knife switch when cutting condition, the handle should be down, turned on, the handle should be upward, cannot flip or paperback, three pole rubber cover knife switch is short circuit protection. Isolated power supply, safety maintenance. Low voltage load switch shell should be reliable grounding. When choosing automatic air switch as diesel generator set main switch, the switch into the line side must have a clear disconnect point, apparent disconnect point can ac motor use isolating switch, knife switch and fuse, etc. The main purpose of the fuse is overload or short circuit protection. Parallel capacitor compensation is directly with the capacitor compensation device and received the same circuit, in order to improve the power factor. There are many measures to improve the power factor, parallel compensation capacitor is the most convenient way.

What are the factors impact on long-term allow cable current carrying capacity?


Carrying capacity refers to a cable line in the transmission of electricity through the flow of electricity, under the condition of thermal stability, when the cable conductor to achieve long-term allowed working temperature of cable current carrying capacity is called cable allows carrying rotor capacity for a long time. In practical engineering, can according to need to refer to the cable in a different environment and allows for a long time under the condition of load flow, choose different types of cable, and determine the number of the cable and cable laying. Therefore, the calculation rotor and stator of cable to allow for a electric motor parts long time spare parts load flow is of great significance. 

Factors affecting cable long-term allow carrying capacity mainly: (1) wholesalemotor.blogspot.com long-term allowed Induction motor working temperature magnetic generator of cable conductor, the higher the temperature, the greater the long-term allow loads of cable; (2) the environment around the cable temperature, ambient air and soil temperature rotor and stator is different, allowing different carrying capacity; (3) the cable conductor cross-sectional area, the greater the conductor cross-sectional area, it allows 3 phase induction motor greater permanent magnet generator carrying capacity; (4) the resistance of the cable conductor material coefficient, the electric generator greater the resistance coefficient, allowing the smaller carrying capacity; (5) cable ambient thermal resistance, heat resistance, the greater the cooling the slower, the smaller the current carrying capacity.

The method of three-phase to single-phase electrical operation

full load 75% load 50%load three phase induction electric motor Y series B35
Specifications
-One year warranty 
-Within 25 days delivery 

-Life: 5-7 years
 If only single-phase power generator source and the three-phase asynchronous motor use, can adopt the method of shunt capacitance change the 3 AC motor phase induction motor three-phase asynchronous motor to single phase operation. As shown in auto spare parts the figure below: (a) is Y connection motor connection auto spare parts method; Figure (b) as the delta connection motor connection method. In order to improve the starting www.dongfeng-motor.com torque, QC will start the capacitance on startup single phase induction motor access lines, at startup after exit. Work capacity calculation formula: GC = 1.950 I/Ucos phi (U F) : I for the rated current of the motor, U for single phase motor single-phase power supply voltage, cos phi for the power factor of the motor. When calculate the ac motor working capacity, start capacitance QC choose work 1 -- 4 times.