Just bought a new Leeson DC 12 volt .75 Horse Power 60 Amp single phase ( I assume its single phase ) motor. I want to protect it from the DC 12 300 CCA ( cold cranking Amps ) battery. Out of my books Make Electronics and/or Electronics For Dummies ...it states:
page 48 " sparking "
" For this reason, you must use a switch that is appropriate for the voltage and amperage that you are dealing with. Electronic circuits generally are low- current low-voltage, so you can use almost any switch, but if you are switching a motor, it will tend to suck an initial surge of current that is at least double the rating of the motor when it is running constantly. You should probably use a 4-amp switch to turn a 2 amp motor on and off. "
My questions are:
1. what is the initial surge called ( B emf ? ) or I read somewhere that it is the opposing emf...
2. the auto battery cables should be able to carry the correct amount of current to the motor ( or is it over kill )...
3. I intend to use a blade switch ( spst ) to connect to the battery... which side neg or pos as it will be a battery that is not connected to a car ( cars are grounded on the neg side ( which is convention electricity - meaning pos is where the emf side and not electron theory that states it comes the neg side )
4. conversations ( from AAC ) stated Fuses don't really protect semiconductors... they protect from fires....so what size Fuse ( Fast acting or slow )...
thanx in advance
Have recovered from the surgeries of 2015 and ready to work on circuit s again...
page 48 " sparking "
" For this reason, you must use a switch that is appropriate for the voltage and amperage that you are dealing with. Electronic circuits generally are low- current low-voltage, so you can use almost any switch, but if you are switching a motor, it will tend to suck an initial surge of current that is at least double the rating of the motor when it is running constantly. You should probably use a 4-amp switch to turn a 2 amp motor on and off. "
My questions are:
1. what is the initial surge called ( B emf ? ) or I read somewhere that it is the opposing emf...
2. the auto battery cables should be able to carry the correct amount of current to the motor ( or is it over kill )...
3. I intend to use a blade switch ( spst ) to connect to the battery... which side neg or pos as it will be a battery that is not connected to a car ( cars are grounded on the neg side ( which is convention electricity - meaning pos is where the emf side and not electron theory that states it comes the neg side )
4. conversations ( from AAC ) stated Fuses don't really protect semiconductors... they protect from fires....so what size Fuse ( Fast acting or slow )...
thanx in advance
Have recovered from the surgeries of 2015 and ready to work on circuit s again...