General stepping motor

General stepping motor has eight root lead.It can be configured for single polarity can be configured to bipolar stepper motor.In resolution of this kind of stepper motor windings may cause some confusion,users because of wholesalemotor.blogspot.com the need to master the correct winding polarity and order.Usually,just rely on observation is unable to determine the polarity of the winding.Fortunately,you can through the electronic measurement method to infer it.1.Distinguish general stepping motor winding polarity In order to measure and determine the general stepping motor winding polarity,need a power supply or battery,and a digital multimeter.Please follow the following steps: (1) first of all,using a digital multimeter ohm file to find four leads,and to identify four windings.(2) choose two windings,and generator stator each choose a lead short answer to each other.Will switch to the digital multimeter AC voltage 20 v,connect the two pens and a digital multimeter to measuring the two ends of the winding.

3.Turn the motor shaft,if the get 2 v voltage reading,then found the same set of winding and also determine their polarity f figure of 81.If the multimeter reading is 0 v,as well as determine the polarity of the winding,the reverse polarity f they see electric motors price figure 9).Switch to the winding of the other fuses and short received another winding,in order to verify the previous assumptions.(4) with lead to indicate the polarity of the windings.As to which side as the above graphic mark of black spots in the end it doesn't matter,as long as you know how to group.2.The configuration method of general stepping motor polarity This section about configuration of general stepping motor polarity of three ways: single polarity,bipolar series and bipolar parallel.As shown in figure 10 configuration simulates a single polarity of single phase asynchronous motor the six winding stepper motor.Shown in figure 11 bipolar configuration can work at a relatively low frequency high torque.Its working frequency cannot is higher,because the series winding with high magnetic resistance,peak current,therefore,cannot fast.Dual polarity is shown in figure 12 parallel configuration the output torque is less than bipolar stepper motor cascade configuration,but it has higher operating frequency,because of the parallel winding configuration has a low magnetic resistance,peak current can be quickly.

The choice of single-phase capacitor electric mechanical and electrical capacity

The choice of single-phase capacitor small electric fan motor electric mechanical and electrical capacity Most of single-phase motor capacitor,such acmotor2.blogspot.com as washing machines,electric fans,submersible pump,small woodworking planer,etc.But due to capacitor spoiled or improper selection capacity,Motor running temperature,noise,power consumption increases,the speed is reduced,the phenomenon such as torque decreases,here the selection of electrical and mechanical capacity of the capacitor motor approach to electricity Work friends can do a introduction,for your reference. Calculation method 1:Single-phase capacitor electric mechanical and electrical capacity depends on the size of the deputy winding current.

Because of different sizes,single phase motor power to consider when choosing capacitance rev Dynamic torque,speed,temperature,noise and loss should be within the normal range.So first of all should from the nameplate detect single-phase motor power,calculate the primary winding of the electricity Flow,and then according to the primary winding current (0.5 0.7) times to perkins diesel generator setcalculate the current value of each winding current,according to the formula C = IC * 10 divided by 2 PI fVo.The formula of the I I = P = V is obtained. 2: the selection of capacitor Single-phase capacitor motor should first choose oil-immersed capacitor,pressure value should be above 400 v.Second optional www.facebook.com/guohong.trading ac

electrolytic capacitor,its small size,low prices,but life Life is a bit short.

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.

Why can't arbitrary starting motor in cold environment?

Motor in the low temperature environment is too long,will be:(1) the motor insulation cracking;(2) bearing grease freeze.(3) wire connector solder powder.Motor in a cold electric fan motor parts environment,therefore,should be kept heating,winding and bearing check before operation.What are the cause of the unbalanced three-phase current motor?(1) three-phase voltage imbalance;(2) motor phase within a pumps certain branch welding is bad or contact;(3) the motor winding interturn short circuit or to ground,interphase short circuit;(4) connection errors.Why can't a 60 hz motor with pick up to 50 hz power supply?Generally make the silicon steel sheet when motor design work in the saturated area of the magnetization curve,when the supply voltage must be reduced frequency will increase magnetic flux,exciting current Flow increase,lead to motor current is added,copper loss increase,eventually led to electricalmotor1.blogspot.com the motor temperature rise up,serious when may also be due to the coil overheating and burning motor.