In what home appliances I can find a 40V (or so) DC motor?
closed as off topic by Chris Cudmore, Niall C.♦, Tester101♦ Aug 23 '12 at 20:22
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probably none. most products that require motors will use AC motors controlled by mechanical timers (which usually use the frequency of the AC line to "tick") or small DC circuits with relays or TRIACs to switch the AC current.
as the size of the motor increases, AC motors are better than DC motors in terms of ease of construction, ease of control and power efficiency. plus, using a DC motor requires converting the AC to DC, and doing so at the higher currents a motor requires significantly increases the cost of the power supply.
so besides small motors for fans, you're likely to never see a DC motor.