Motor surges We have a Kitchen Aid Pro 600 and the motor surges at low speeds

There are several potential reasons why your KitchenAid dough mixer might be shutting off. Here are a few possible causes:
Overheating: If the mixer has been running for an extended period of time, the motor may overheat and shut off as a safety precaution. In this case, you should allow the mixer to cool down for a while before using it again.
Faulty wiring: If the mixer is shutting off when you turn it on or when you change the speed, there may be a problem with the wiring. You should check the wiring to see if there are any frayed or damaged wires that could be causing the issue.
Clogged air vents: The mixer may shut off if the air vents are clogged, as this can cause the motor to overheat. You should check the air vents to make sure they are clean and unobstructed.
Failed motor: If none of the above issues are present, the problem could be with the motor itself. A failed motor can cause the mixer to shut off, and it may need to be replaced.
If you are not comfortable troubleshooting the mixer yourself, you should consider contacting KitchenAid customer service or a professional appliance repair service for assistance.

I can't say with any confidence I know how it works, however it is a series wound brush type motor that without control produces high torque at low speed - directly wired such a motor would only be running slow because of an excess load when it would consume enough current to self destruct.

Speed control is accomplished by electronic circuitry reducing the power to the motor which is fine when no load is applied but that is completely unsatisfactory so there is also a centrifugal governor to provide a more stable speed under load and that could be the problem - maybe a spring dropped out or something.

Sounds like the speed control, easy to replace and the model is on the bottom. Simple google search to find part

Kitchen Aid does have different bowls for several different models. You can also contact Kitchen Aid direct to get information about your model. Here is a link with information about your model mixer.

http://www.kitchenaid.com/shop/-%5BKP26M1XNP%5D-404905/KP26M1XNP/

After many years dealing with Kitchen Aid mixers I purchased a pro 600 for my wife as an early Xmas gift. After just a few usages it started making a clunking noise in the gear housing. I removed the housing and discovered the casting is of very poor tolerances and the main drive assembly was lifting from the torque of the motor and causing the gear assembly to lift out of the casting and skipping on the worm gear. I am sure it is going to happen to many more of these units as the casting area that holds the bearing in is to large obviously an overdue mold in the casting process. Time for a recall Kitchen Aid.

Bad motor = $125.00
bad speed switch = $38.00
bad plug = $17.00

All are easy fixes in that model and all parts are available on the internet and ebay. A kitchenaid parts manual can be downloaded off of the internet and it is basically a tear down guide. Shoul be able to accomplish any of the three fixes in 15 to 60 minutes

bread is very tuff on mixers. always buy the strongest mixer that you can afford. im guessing the field in the motor fried.

Looking at the diagram here:

http://shared.whirlpoolcorp.com/assets/pdfs/literature/Repair%20Part%20List%20-%208212278.pdf

You will see the motor controller Item Number 19. Looks like a pretty simple taks to remove and replace it. there is also a hall effect sensor Itme Number 24 which monitors the motor speed. That might be faulty as well, but my best bet is the controller.

Unfortunately the parts list does not specify the part number for the controller so a call to Kitchenaid is probably required.

It sounds like you may have a governor issue. which is located at the back of your unit. it controls the amount of current going to your motor by way of centripetal force. the part number for the governor assembly is 4159675. this can become weaker over time and will eventually cause it to sputter or speed up suddenly. hope this helps.

Thanks

i want to buy a kitchen aid

and i was wondering about the voltage since i'm in Qatar


and i found this answer , Hope its useful

http://www.110220volts.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=750-WATT&Category_Code=DownVoltageTransformer