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Motor slip ring during use should pay attention to the problems by usb3-0 espow






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Motor slip ring during use should pay attention to the problems by
Article Posted: 10/07/2013
Article Views: 1363
Articles Written: 55
Word Count: 628
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Motor slip ring during use should pay attention to the problems


 
Blogs,Business,Ezine
collector rings is used for motor commutator or slip ring , as export and import current sliding contact body , its electrical conductivity , thermal conductivity and good lubricating properties , and has a certain mechanical strength and commutation sparks instinct. Almost all motors use brushes , which are important components of the motor . Widely used in a variety of AC and DC generators, synchronous motor , battery DC motor, crane motor slip ring, various types of welding machine and so on.

With the development of science and technology , the motor type and use more diverse working conditions , and thus require a variety of different grades of brushes to meet these requirements , it is also the type of brush as the motor industry development more and more. Then we use electrical slip ring in the process should pay attention to what the problem?

Slip ring motors in use should be noted:

( A ) general design slip rings motor at an altitude of no more than 1000m, ambient air temperature does not exceed 40 ? to run the place . ( 2 ) slip ring motor voltage change in the additional within ± 5% when the fixed rate can be rated for continuous operation . If the voltage changes more than ± 5% , then shall be specified by the manufacturer or limit the load test results .

( 3 ) to the cooling air from the outside of the motor , in order to avoid moisture , after the shutdown , must be promptly stopped the supply of cooling air .

( 4 ) Check the spark is normal under the brush , the motor slip ring ( or steering ) have burns and wear.

( 5 ) Check the motor slip ring in operation for unusual noise and vibration , the stator and rotor are relative to the friction .

In the collector ring brushes when running on a contact surface to form a layer on its uniform , moderate and stable oxide film , which is the main indicator of the motor running good one . When the brushes wear to the normal position and the pressure can not be maintained , or when worn brush to the original height of 1/ 3, the replacement specification requirements should brush blocks , replacement of the new brush and slip ring contact surface of the motor to be processed the corresponding arc, to ensure the motor brush and collector ring has a good contact ( the contact surface is not less than 75% of the total area ) . Processing with a fine emery cloth attached to the motor slip ring surface , the brush simulate conditions on the ground in emery cloth to the desired arc . When the motor slip ring surface is worn or spark burns black , a minor can carefully polish, fine emery cloth and abrasive clean ; serious ( if there groove ) , you need to finish turning the motor slip ring surface, so that the roughness of 1.6 , runout less than 0.04mm. Underside of the motor brush holder collector slip ring surface distance should be kept about 3mm . Motor core or casing temperature rise should not exceed the level required by the motor insulation temperature rise . E-class is : 80k ( resistance method ); F level is : 105K ( resistance method ) . The motor should be repaired , should be minor repairs per month , one year shall be for a major overhaul . Weekly deal for motor slip ring motor inspection and cleaning motor surface dust . These are some of Shenzhen Jing Pei Electronics engineers to use the motor slip ring customers with little comment.

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