Kirby Dual Sanitronic Question…

[oatmealman]

So I recently got a DS 50.
I was wondering why it shifts to a higher speed only when the hose is attached rather than just always have the higher speed on. Sorry if it’s a silly question but I don’t understand why you wouldn’t want maximum power at all times. Thanks

 

[lesinutah]

The

Motors weren't made to run on higher amperage with the field coil and the carbon brushes. You can make it run on high but it cuts the motor life in half and carbon brushes and bearing wear out alot quicker.

 

[electrolux137]

Because the motor will soon burn out. The higher speed is to give higher suction through the hose and wand but not meant to be used for long periods of time.

 

[ct77]

Overpowering motors

I'm sorry, I have something a tiny bit off topic from the post, but I thought it was hilarious.

There is a guy on Youtube from the UK (I think his channel is "ibaisaic") and he was showing some vintage vacuum cleaners he had actually imported from the US. He was talking about how he of course had to use a step-down transformer since the UK uses 240 volts. One of the vacuums he was showing from the US interestingly had a rating for 120 volts either AC or DC. I would assume that must mean it has a series-wound, "universal" motor. He said he wouldn't even WANT to know what would happen to the vacuum if he powered it with UK mains...

I thought about that...imagine running a series-wound motor in a vacuum with DOUBLE the voltage it was designed for. LOL how long would it survive? I just imagine it would turn into a screaming, screeching jet engine before probably catching fire.

 

[lesinutah]

Difference

The vacuums produce more watts less amps. Basically double the 110 to 220 5 amps to 2.5 amps. The reason you need a step-down is the current is different. They don't have souped up vacuums just altered to work as needed.