Description features:General Description
Y,YKS.YKK series medium-sized high voltage three phase asynchronous notors are our latest products,there are totally 5 frame size ranging from H355 to H630.
TO develop these series motors,advanced analytic and calculaals and excellent workmanship are also adopted during manufacturing.All of those give series motors high efficiency,low noies,low noise,low vibration and high reliability.
All motors in basic design are of horizontal with feet mounting type (IMB3).duty type is continulus operation(S1).
Normally,the motors have three types of enclosure protection degree:IP23,IP44 or IP54.
In respect to cooling type,the motors basically have IC01,IC81W or IC611 three types to be selected.
Briefing of construction
A steel plate welded construction has been used to reduce the frame weight and increase the rigidity,optimum construction design also makes sries motors convenience for installation and maintenance.
One piece laminations for the stator and rotor are precision-stamped from low loss electrical steel,thus the iron loss is minimized and the efficiency is improved.
The insulatio class of series moteors is class F.The stator coil is a double layer formed coil,the stator core is stacked and assembled with coils outside the frame,coil braces are applied on the circumference of the stator coil ends with spacers inserted between coils to improve rigidity.After the connection between coils is made, the completed stator winding is placed in a vacuum tank and impregnated,then the stator winding is put into the stator frame and fixed with it.
The standard design of the rotor is of copper bar construction,depending on starting conditions,the rotor bar are made of copper of copper alloy.Advanced brazing technology of the rotor bars to the end rings insures mechanical integrity and results in uniform strength and electrical conductivity at the brazed joints.By swaging the rotor bars against the slot sides,the vibrations of rotor bars due to electromangnetic force or centrifugal force are eliminated and insure long notor life.
For the frame size below shaft height 500mm ,the cast aluminum rotor constructio is also possible.Because of the tight fitness between the rotor conductor and slot sides,the heat generated in the rotor conductor is easy to be dissipated,the safety locked rotor time is longer4 and the permittd moment of inertia to be driven by the motor is bigger.
For 2P motors from H400~H450 and all 4~12P motors,the standard designed series motors adopt anti-friction bearings,self-lubricated with grease or oil according to motor's frame size and operating speed,separate oil supply sysem is not needed.Split sleeve bearings are used for 2P motors from H500~H630 or when specified by purchaser,they are either ring-lubricated or forced-oil lubricated depending on the loadin