Ammeter pointer during no-load or load running back and forth

1),2) squirrel cage rotor broken bar,a phase winding rotor circuit (3),a phase of wound rotor type motor brush contact bad 4),wound rotor type motor Poor contact slip ring wholesalemotor.blogspot.com short circuit devices 9.The cause of motor vibration 1),2) unbalanced rotor,shaft bending head 3) 4),imbalance of pulley,pulley eccentric shaft hole 5),fixed the loose bolts 6) of the motor,fixed The acmotortrading.blogspot.com foundation of the motor not firm or uneven 10.The cause of the motor bearing perkins diesel generator set overheating 1),2) bearing damage,lubricating oil too much,too little,or oily bad with 3),bearing and perkins diesel generator set shaft too loose walk in circle or too close with 4),bearing and end cover too loose walk outside Or too close.5),sliding bearing ring rolling or slow rotation 6),on both sides of motor end cover or bearing cover is not flat 7),belt tight 8),coupling packed Not good.

Capacitor start motor

In capacitor start motor,start capacitance and start winding string together,thus forming a LC circuit,the circuit has good phase shift (and thus have a very good starting torque).The resistance for the motor will also increase the cost.Fixed phase capacitor motor Another motor is fixed phase capacitor (PSC) motor (i.e.,capacitor motor) up and running.This kind of motor operation mode is similar to the capacitor start motor described above,but it does not have the centrifugal switch,so

its secondary winding is connected to the grid.PSC motor is usually used in hair dryer,electric fans,blowers,and other need to change.Under the condition of invariable load by changing www.dongfeng-motor.com the running winding signal to achieve the purpose of make the motor run at different speeds.All six winding connection respectively,a three-phase motor can connect two winding together through the rest of the a winding capacitance connected to start winding to run into one capacitor start motor.The repulsion motor Repulsion motor is single-phase ac motor rotor winding,it is similar to ac/dc motor.In the repulsion motor armature with brush nipple rather than and in series with the magnetic field.

Already have a few kinds of repulsion motor into production use,but most of all,with repulsion start sensing (RS)-IR motor operation.RS-IR motor with a centrifugal switch all the short commutator connect together,so when it is up to full speed it will run in the form of induction induction motor sales motor.RS-IR was used in the motor under low temperature and low voltage per ampere provide large starting torque.In 2005,almost did not sell any type of repulsion motors.Single-phase ac synchronous motor Small single-phase motor can also be designed to be magnetized rotor.This does not require any motor in the rotor induction motor,so they will not be lower than the main frequency.Instead,they will be as the rotation frequency synchronization.Because of their high speed precision,this kind of motor is typically used in electric power mechanical clock,record machine and tape recorder; They are also used in such as ribbon machine and telescope driving mechanism requires precise time of equipment.Shaded pole type synchronous motor is one of them.Because of inertia,so it is difficult to the rotor from state stopped immediately accelerated to synchronous speed.This kind of motor usually need some special way to start.A variety generator rotor and stator of different Design with a small induction motor (it will share the same and the synchronous motor excitation coil and rotor) or one- way speed (guarantee the rotor startup positive speed) as the very light of the rotor.

New technology of double speed motor

Because of the pump station drainage standard is low, and the drainage area and large variation range of water level, so often occurs in the pump station has been built for super lift was forced to stop. For this kind of pumping station renovation, such as simply to replace the existing high lift water pump water pump, although is can solve the problem of pumping station super head, but is likely to accompany a pump under low head gravely deviates from the high efficient www.facebook.com/dongfeng.motor area, causing new problems such as cavitation and vibration. Two-speed motor is new technology on the basis of the original water pump, by changing the line will be converted into motor with high and low two two-speed motor speed. Allows the unit to the there was a high lift pump station, corresponding to run at high speed, low in pump motor part station head, corresponding to the low speed running, which can run in the pump station super lift requirements under the premise of guarantee the magnet generator pump running in high efficient area for a long time. At present, the double-speed motor has got application in dongshen water supply project, at the same time by wuhan university of hydraulic and electric engineering of pump and pump station laboratory under the support of the department of the ministry of water resources, also have finished the old motor into two-speed motor research topic (the technology has been declared national patent), and using the new technology of double speed motor pump station created good conditions. Old motor modification two-speed motor method is to remove the old motor winding, and according to the original polar logarithmic nested new winding. When nested new winding, a new tap, derivation of new winding coil through the tap can be back together, so that the motor of the logarithm change, so that the motor has two logarithm, namely has the function of double speed.