Electric Motors/rotation of electric motor
I work on a Hobart mixer 302SE. it look like the very old one. the electric motor is consist of stator with 4 wire out(Red,white,Blue,white) and the arrangement of connection in terminal is Red connect to live(+) white connect to neutral(-), blue and other white are connected to gather. rotor is a wind one and in the end there are 4 carbon brush position is 90 degree round the collector of rotor that by a metal ring connect together. this motor suppose to turn clockwise to turn the gearbox and eventually turn the mixer hock. before I do any thing the situation was as follow:
by turning on the motor the rotor was click right and left for a few second then start to turn either way. I checked the back of motor and see the carbon brush assembly is lose and turn with rotor.I fix the assembly and replace the missing brush.( during the click left and right some smoke was coming from motor but not a grate deal.) the motor turn anti clock wise my question is:
dose the brushes must be connect to any source of power at all?
how I can correct the turning direction.?
many thanks for your time and help.
That is based on an OLD repulsion induction motor, those were made for very high torque applications and some are very very valuable not only as motors but as collectibles,
They are the strongest AC induction motor type period, the smoke bothers me,
It has to mean something burnt now was it serious I dont know,
I think this Hobart is recent machine with maybe a cheaper made repulsion induction motor, the best bet is to find a motor shop this is no regular motor, but lets look at it anyway and you tell me there are a couple types of rep ind motors some raise the brushes with a spring device some have the brushes on all the time no the rotor is not excited by itself see the link below it will show you
When it starts in both directions that means the starting circuit is open letting the run winding follow whatever mechanical push in whatever direction but wont get up to speed normally
This motor is very complicated,
Look over the link above if you are really good with mechanical and electrical maybe you start to diagnose this motor, the brushes short out the rotor then depending on the type of Repulsion Induction motor there may be a spring loaded device that pushes the brushes off and on the rotor the face of the rotor is like an armature it has the segments so the brushes are contacting in a horizontal plane versus a vertical plane,
Take a look at the link and then we will talk more
YOUR QUESTIONS DIRECTLY ;
dose the brushes must be connect to any source of power at all? NO it does not need power like a slip ring motor
how I can correct the turning direction.? by shifting the brush holder device in a circular direction until you get the rotation you want, there might be marks somewhere if you look close enough
Rotation see the bottom link video it is shifting the brush rack to change directions but the brush holder device has to be correct the brushes seated flat against the commutator segments and all springs working on the brush holder FIRST
I need the motor data if you have it
The motor was made for Hobart, so it is OEM to Hobart LONG LINK BELOW
more sites for hobart parts
YOUR questions are good but take a lot to type out and explain look over these links and see what you think you have my personal address if you need it