Can voltage be changed to 110?

You simply can't use any 110V device at 220V, be it a cellphone converter or a food mixer.. Some artifacts have a switch to be used at 110/220 and those, once changed to 220V, can be used.

First here is the link to a good suuplier with OEM parts for 110 and 220 volt http://www.appliancezone.com/SearchProducts.aspx?ID=9707627&x=12&y=7

you can change any KA mixer from 110 to 220 and 220 to 110, you need the armature stato phase control board and speed swith for eith conversion, the 220 madel number or 220 model has a letter in front of the ka which is the indicator for 220 volt go to http://www.kitchenaid.com/webapp/wcs/stores/servlet/OCManualsLiteratureSearchResultView?catalogId=10552&langId=-1&storeId=10202 for a exploded parts list and part numbers look any where for a KA 220 volt model and you can find the same thing

You need a Step Down Voltage Converter (also called a Voltage Transformer)
which steps down 240, 230, 220 volts to 110 volts and
allows you to use 110 volts Devices from USA in 220 v / 230 v / 240 v Countries

You need a Step Down Voltage Converter (also called a Voltage Transformer)
which steps down 240, 230, 220 volts to 110 volts and
allows you to use 110 volts Devices from USA in 220 v / 230 v / 240 v Countries

Bosch is not very good about putting manuals or other documentation online for older products, so I'll have to give you generic advice.

Some electric motors have optional voltage connections. If your motor has this feature, there will be a box or removable plate on the motor with 110 Volt and 220 Volt connections inside. You would need to replace the line cord with a 220 Volt cord having the correct plug for the location you plan to use the mixer, and connect the motor "hot" wire to the 220 V connection in the motor junction box instead of the 110 V connection (the neutral wire goes to the same neutral).

If there is no such option available on the motor, you would also have to replace the motor with a 220 Volt version. Check the labeling on the speed control (inside the mixer) to be sure it is rated for 240 VAC, and check the power label by the power cord. If the label gives a single range of input voltages spanning both 110 VAC and 220 VAC (e.g., "Input 97 V- 265 V") then you only need to change the plug. Unless the electrical parts are all rated for 240 VAC or higher, conversion is not safe.

Some products (especially desktop computers) have a recessed switch on the back that lets you select either 115 VAC or 230 VAC input power. If you have this on the mixer, all you have to do is use a small tool to push it to the other position.

An alternative is to get a 230 VAC - 115 VAC transformer or inverter rated for at least 800 Volt-Amps and wire it with a 230 Volt plug on the primary side and a 115 Volt socket on the secondary side; then you can just plug in your unmodified mixer to this. If you cannot find a box like this, you can buy a "control transformer" from an industrial equipment supplier and put it in a suitable metal box. I recommend including a power switch and a 4 Amp dual-element fuse or breaker on the primary side circuit; you don't want somebody burning up the transformer with a 1200 Watt microwave oven or griddle.

Maiins Voltage in Aus is nominally 240 Volts, so plugging in directly with an adaptor will fuse motor. The only way to use the Miixer is to purchase a step down transformer (ie 240 V to 110 V) with a minimum rating at least equal to the power of the mixer which is 250 Watts. You should be able to purchase the transformer online or through Jaycar Electronics (branches in most major cities) . They are not that cheap but would be less than getting a new mixer rated at the correct voltage and it would also let you power other 110 V items that you have provided you don't exceed the transformer rating.

There is a transformer sold for US travelers that should work just fine.

http://www.amazon.com/VOLTAGE-CONVERTER-PRODUCTS-COUNTRIES-SM-1875/dp/B000W91XBO/ref=pd_sbs_a_5

Why not use a transformer?

http://www.amazon.com/VOLTAGE-CONVERTER-PRODUCTS-COUNTRIES-SM-1875/dp/B000W91XBO/ref=pd_sbs_a_5

You would need to provide the correct power to match the maching, or replace the rotor, stator, controls to match the higher voltage, and worm gears to correct the speed, from 60 to 50 Hz. Unless you don't mind it running slower. Cheaper to find one that matches your local spec..

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