2014年8月12日星期二

The role of small power motor


Motor as an ac synchronous motor important device of electromechanical energy conversion,is the basis of the electric drive
components,its power consumption occupies more than 60% of the total electricity consumption,to the national economy,energy,environmental protection and the improvement of people's living quality plays a very important role.Therefore,development of high efficiency,energy saving,consumption
reduction,high reliability,small power motor products,recommend a batch of product technology high quality and good market reputation famous quality products to the customers at home and abroad choose
small power motor,creating a national brand motor products,enhance the international
competitiveness,to ensure the sustainable development of national economy is of www.dongfeng-motor.com great strategic
significance. With the rapid development of science and technology and the continuous improvement of
people's living standard,all kinds of motor in the industrial automation and the life of people work
is to play a greater role.Small power motors as a driving source,they are widely used in the
development of world economy occupies a more and more important position,the industry for rapid
development of traction many industrialised countries economic development plays an important role.As household appliances and small power motor car mechanical and electrical energy conversion and the core of the degree of automation to improve drive execution parts,motor performance indicators
related to directly determine the performance of household electrical appliances,equipment and
technology level.It is not only the power of industrial equipment,but also the modernization of
life.Motor quality and advanced levels also reflect a country's automation level indicators,motor
quality decides the quality of life of people and the country's industrialization level. 

Domestic usually according to the power of the motor can be divided into large motor,small and medium-sized
motor,small power and other three categories.With the deepening of the reform and opening up,our
country joining WTO,and the transfer of world manufacturing center of gravity is to China,China has become the world's small power motor manufacturing base,small power motor output accounts for more than 60% of the world total.Therefore,seize the favorable development opportunity,realize the industry restructuring,build national brand of electrical products,enhance the international
competitiveness,has become an important subject of our country's motor industry. Basis "electrician
noun predicate GB2900.27-1995 small power motor" standard definition,small power motor is equivalent to 1500 r/min,the maximum continuous rating of no more than 1.1 kW motor,which motor 1.1 kW and below
are collectively referred to as "small power motor",it contains the people often say "fractional
horsepower motors" and "micromotor.Because it is so intertwined with the lives of the people,have
been listed in the national rotor balancing machine compulsory certification.There are many different kinds of small power motor,can be roughly divided into three phase asynchronous motor,three-phase electric pump,washing machine motor,air conditioner fan motor,etc.27 classes. Small power motor is an important basis of mechanical parts and smart actuators,most of the products in the industry are listed in the national focus on encouraging the development of the industry,product and technology directory,conform to the requirements of the informatization spurs industrialization development,by the national industrial policy support,in line with national development direction of industrial structure.

Phase ac motor capacitor after the start and use?


The rotation of the single phase ac motor principle Only a single phase ac motor winding,is squirrel cage rotor.When a single-phase sinusoidal current in the stator winding,the motor can produce an alternating magnetic field,The magnetic field strength and direction of interplanting sine law of change at any time,but on the spatial orientation is fixed,so the magnetic field is also called alternation pulse magnetic field.The pay Variable pulse magnetic field can be decomposed into two at the same speed and direction of rotation are instead of a rotating magnetic field,when the rotor static,the two two rotating magnetic field in the rotor An equal and opposite torque,making synthetic torque is zero,so the motor can't rotate.When we use the motor rotates in the direction of a force (clockwise),then the rotation of the rotor and clockwise direction magnetic field between the cutting lines of magnetic force movement decreases; Rotor and the spin counterclockwise direction Turn the cutting lines of magnetic force between field.This balance is broken,the total electromagnetic torque generated by the rotor will no longer be zero,the rotor will spin down driving direction Turn up.To make single-phase acmotortrading.blogspot.com electric function automatically spin,we can add a starter in the stator winding,starting with the main windings in space by 90
degrees,starting Winding to concatenate a suitable capacitance,makes differ with on the phase of
wholesalemotor.blogspot.com the primary winding current approximate 90 degrees,the
so-called split-phase principle.These two are on time 90 degrees of electricity flow into
motor lamination the two differ 90 degrees of winding on the space,will be produced
in the space (two-phase) rotating magnetic field,under the effect of the rotating magnetic field,the rotor is Can automatic starting,after the start,to speed up certain,with the aid of an installed on the rotor of the centrifugal switch or other automatic control device will start winding
disconnect,The only main winding work in normal working conditions.Therefore,starting winding can
make short work.But there are a lot of time,starting winding is not broken,we induction
motor refer to this Single-phase motor,motor for capacitive's turn to change this motor,can be achieved by changing the position of the capacitor is concatenated.

2014年8月11日星期一

380 v motor circuit of PVC cable selection table

380 v motor circuit of PVC cable selection table.Note: according to electric vehicle motor the specification for design of low-voltage distribution GB50054-95, S (was) phase line conductor section 16 or less, use the cross section such as the electric motor cooling fanfour core cable; Phase line conductor cross section 16 < S (was) 35, or less with PE line section 4 core cable for wholesalemotor.blogspot.com 16 (was); Phase line conductor cross-section (was) > 35 S, with PE line cross section for the S / 2 (was) 4 core
cable.

2014年8月10日星期日

Motor model

Motor model is easy to use,design,manufacturing and other departments for business contact and simplified technology files in the product name,specification,type of narration and referenced by a symbol.Product code is made up of motor type codes,codes of characteristics and design of the serial
number electric vehicle motor of three section sequence.Motor type code with:Y - said asynchronous motor;T - synchronous motor;Motor characteristic code represent the performance of the motor,the structure or purpose and use of the Chinese phonetic alphabet. Such as explosion-proof type letters EXE (type) of increasing safety,EXB (flameproof),EXP (positive pressure type),etc.Design the serial number is high in center,core diameter,frame number,the flange length,length of frame,core code,power,speed,or series of said.Such as:Y2-160 M1-8 Y:models,asynchronous motor;wholesalemotor.blogspot.com 2:design the serial number,"2" for the first time based on the improved design of the product;160:high center,is the shaft center to the base plane height;M1:frame length specifications,M is medium,including footnotes "2" is the second M type core specification,type and "2" longer than "1" type iron core.8:pole,"8" refers to eight pole motor.Such as:Y 630-10/1180 Y said asynchronous motor;630 said power 630 kw;10,stator core diameter 1180 mm.The length of the frame adopt the internationally used symbol of letter;S is 8500w gasoline generator short frame type,M is the base type,type L is the length.Core length of letter with Numbers 1,2,3,in turn,said.

Brushless synchronous generator is how to generate electricity?

Three-phase brushless synchronous generator excitation system are connected by a coaxial communication issue of ac exciter,after rotating rectifier rectifier for direct current (dc), Then sent to the generator exciting winding.Ac exciter is diesel generators prices
rotating armature type of three-phase medium frequency generator,the frequency of generator frequency three times Left electricalmotor1.blogspot.com and right sides,which can improve the
perkins diesel generator set excitation response speed.Exciting winding is
stationary,controlled by the automatic voltage regulator AVR excitation.Rotating rectifier Have high reliability,using the three-phase half wave bridge rectifier and three-phase full-wave bridge
rectifier,firmly fixed on the rotor,with the www.dongfeng-motor.com current measurement And fault indicating device.

Variable voltage speed control of brushless dc motor

General essentially belongs to the servo motor,brushless dc motor made up of synchronous motor and drive,frequency conversion speed regulating motor.Variable voltage speed control of brushless dc
motor is In the true sense of the centrifugal pump brushless dc motor,it consists of stator and rotor,stator consists of core,coil adopts "shun - inverse - direct - reverse..." Winding,the resulting N - S group Fixed magnetic field of the rotor is composed of a cylinder magnet with axis (middle),or is composed of electromagnet and collector ring,the brushless wholesalemotor.blogspot.com dc motor can produce torque,but can't Controls a direction,no matter how to say,this machine is a significant invention.When as a dc generator,the present invention can produce continuous amplitude of the direct current Flow,thus motor fan avoid the use of filter capacitor and the rotor can be permanent magnet,with brushless excitation or brushless excitation.When as a large motor,this electricity to produce self-induction,the need to adopt With protection device.

2014年8月8日星期五

YB series flameproof three-phase asynchronous motor

YB series flamepro of three-phase asynchronous motor YB series flameproof three-phase asynchronous motor 1.1,2 dangerous gas places electric motor parts;2.A and B Ⅱ Ⅱ classes T1 - T4 group explosive gas or steam environment;3.Indoor,outdoor (IP54).YB series flameproof three-phase asynchronous motor acmotor2.blogspot.com technical characteristics 1.Cast iron shell,the surface coating;2.With high efficiency,rotor balancing machine large torque,low temperature,low noise,small vibration,safe and reliable;3.The cable or steel pipe wiring.