Would a US dishwasher work on 220v with a transformer?
A mixer is an intermittently loaded device… the usual interval of use is such that any adverse consequences have less time to impact the motor. Also, the motors themselves are not AC motors, but are DC motors with circuitry in between the mains and the motor to regulate speed. This could be as simple as a phase angle triac driver with a bridge rectifier on the output, and the speed control is the phase angle adjustment. With this scenario, the frequency is much less of an issue. Drawing a conclusion about dishwasher operation based on mixer success is technically unsound. The motors in a dishwasher are almost certainly different… AC induction motors. They run constant speed and are likely connected directly to the mains and they run for much longer periods of time in normal operation. They will also run at at different speed at a different frequency. As frequency decreases, the voltage should decrease, too. If you decide to run the unit on lower frequency, decrease the target volta
If you are moving to the UK keep in mind that the people you can hire to install it will be completely unfamiliar with it. Given that they often suck at installing dishwashers with familiar features I’d be very concerned. Also you could invalidate your home insurance. Our rental lease here actually contains a clause prohibiting us from starting the dishwasher or laundry washer and going out.
I did almost the opposite about 5 years ago, throwing a 220v clothes washer onto a 120v US circuit. No US manufacturer makes a good washer/dryer and the euro brands are $$$$ in the US, so I imported. 1) Don’t. Honestly, don’t. Take a good look at what’s available in the country you’re moving to. Most American appliances are rubbish and are priced appropriately. The only reason I imported my washer & dryer was that I couldn’t find what I wanted in the US. 2) OVERsize the transformer. Not quite as critical with a dishwasher as a clothes washer due to the constant duty cycle of a dishwasher vs. intermittent of a front-load washer, but well worth it. Let’s be honest, we’re already pushing things hard as it is. 3) Frequency doesn’t seem to matter all that much. Yes, motors will run slower if they’re AC motors. Fortunately my washer was all DC motors so no speed difference that I’ve noticed. In your case you’d be going to a slower speed so in theory the motor would run somewhat cooler. DC mo
