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   alt.electronics      Electronics design, repair, worship, etc      7,706 messages   

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   Message 7,035 of 7,706   
   Jimmy Wilkinson Knife to Andrew Gabriel   
   Re: Why are motors not current limited?   
   21 Apr 18 18:33:08   
   
   XPost: uk.d-i-y, alt.home.repair   
   From: nowhere@somewear.co.uk   
      
   On Sat, 21 Apr 2018 17:55:20 +0100, Andrew Gabriel  wrote:   
      
   > In article ,   
   > 	"James Wilkinson Sword"  writes:   
   >> How hard can it be to put some kind of electronic limiter on a power tool   
   so if you over-stress it, it doesn't consume enough current to melt the coils?   
   >   
   > You can buy professional power tools with that sort of protection,   
   > or you can buy much cheaper DIY tools without it. My Metabo SDS   
   > drill has it, but it cost well over £300.   
      
   But why should we have to pay £300 to get some basic electronics included?   
      
   >> I assume something like this must be done on electric cars, or instead of   
   stalling the engine, you'd wreck the motor.   
   >   
   > Vastly more expensive power controller than the light dimmer used   
   > as a speed control in DIY power tools.   
      
   Yes, but cars have very powerful motors.  Even a washing machine has a very   
   complex control unit.   
      
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