Innkjøring av el motorer

[Niklas]

Kjøpte en ny motor til Slow Sticken her en dag, og lurer derfor på hvordan jeg på best måte kan få den til å vare en stund, innkjøring, vedlikehold ol.

Niklas

[Vingemutteren]

Kjør den uten belastning (plukk av giret eller ihvertfall uten propel) i 1-2 timer på 1/3 til 1/2 av den spenningen motoren er beregnet for (normalt ca 3V burde vere ok) og børstene burde ha satt seg. Ett alternativ er å koble på 2 D cell 1,5V batterier i serie og la motoren gå til batteriene er tomt.

Her står det på engelsk med litt ekstra info:

Electric motors

Q What does "breaking-in" a motor actually do?
A. Terry Gamble

Basically, a new motor comes with flat brushes and a round commutator. the idea is to wear the brushes down in such a manner that you have a curved surface (and thus more contact area) at the commutator/brush interface. if you try to break it in by simply flying it at full load, you create a lot of arcing which pits the surfaces and degrades performance. note that you must break in the motor prior to using it. if you've already pitted the brushes and commutator, it is too late. you then have to settle for what you have, or buy a new motor. you can expect this procedure to improve power output 10-30 %. inexpensive ferrite "can" motors need all the help they can get so don't forget this step! some motors do not need to be broken in. manufacturers of these high-quality motors will mention this in the motor's manual. if in doubt, break it in.

Q. How do I break-in a motor?
A. Terry Gamble

Ideally you'd like to run the motor at about 1/3-1/2 it's rated voltage with no load (without prop) for an hour or two. long enough to wear the brushes down without arcing. the r/c car guys have special transformers for this, but all you really need for a typical 05 can motor is 2 alkaline d cell batteries and some spare 12 gauge wire. simply hook the batteries up in series so you have a 3 volt power source and hook the wires to the appropriate terminals on the motor. let the motor run until the batteries are dead, and presto...you have a broken in motor. if you have an old electric train transformer and a voltmeter, you can also dial in 3-4 volts with the transformer and save the cost of 2 batteries.

Q. What is a Water break-in?
A. Steve Krainish, Destroy, Jim Petro and others from the Ezone forums

This is an alternative way of breaking in a can motor by running it at least partly underwater (at the low voltages used this is not at all dangerous). Doing it this way takes only a few minutes so is a lot quicker than the traditional way of running the motor dry for several hours. There are a number of different ways of doing a water break-in. All seem to work. It's up to you which you prefer. All versions have in common the fact that the new motor is run with no load and immersed in water. The break-in is complete when you see the water go slightly gray or hear the motor speed up.

The main variations are :
The water can be tap water or distilled water.
You can optionally add a VERY SMALL amount of dish washing liquid to the water
The motor can be run on normal voltage, on one cell less than normal, on 2 alkaline cells or on a low voltage from a power supply (I have used 5V)
Some motors have very hard brushes and will never bed in properly however long you leave them. If you see/hear no results within 10 minutes you may as well give up.

When you have finished, dry the motor carefully. A hairdryer on a low setting works well. Then lubricate the bearings with a couple of drops of thin oil and you're ready to go.

Mye mye mere finner du her:
Electric Flight - RC Groups

[Niklas]

3,7 V er vel grei strøm? har kjørt den i ca en time nå, det funker greit. den blir verken varm eller noe annet.

Niklas

[Vingemutteren]

3,7V er hel ok. Gi den en 1/2 time til så er det sikkert helt ok.

[Niklas]

Jeg satt mamma til å høre på spetakkelet (hun holdt på med noe tull på dataen), og hun satt vel en times tid til .

[Vingemutteren]

Var det en EPS350 du satte på? hvordan var effekten og draget? og merket du at den nye motoren går stillere etter innkjøringen?

[ToreH]

Har drevet med modell bil en stund på konkurranse nivå.
For beste innkjøring av børster og kommutator kjører vi dremelen direkte på akselen på laveste hastighet en halv times tid.
Eneste sak er at motoren virker da som en dynamo... Vær forsiktig så den ikke kortsluttes. Og IKKE kjør den med regulatoren tilkoblet.

[Vingemutteren]

Kul ide.