Heya all,
A long story made short...
Basicly i have a power supply that gives out 18 Volts DC...
During the long story i discovered that if you go from the negative or positive of this power supply down to earth there is a potential diffrence of 110 V AC.
Now i cant understand why could anyone point me in the right direction ??
The power supply seems to operate okay give out the 18 volts DC is suppose to and its a double insulated device.
So im using the house earth when measure the potential.
Is this 110 V AC created from the PWM modulation devices that help keep the DC supply stable ?? or is there something wrong maybe capacitor causing this problem or something ??
EDIT * Also if you measure potential diffrence in AC across the postive and negative its 1v or something so shows its in phase on both conductors too*
At first i thought the bridge rectifier was defective but test and all is okay.
Cheers for reading and any advice or comments you have .
Tom.
A long story made short...
Basicly i have a power supply that gives out 18 Volts DC...
During the long story i discovered that if you go from the negative or positive of this power supply down to earth there is a potential diffrence of 110 V AC.
Now i cant understand why could anyone point me in the right direction ??
The power supply seems to operate okay give out the 18 volts DC is suppose to and its a double insulated device.
So im using the house earth when measure the potential.
Is this 110 V AC created from the PWM modulation devices that help keep the DC supply stable ?? or is there something wrong maybe capacitor causing this problem or something ??
EDIT * Also if you measure potential diffrence in AC across the postive and negative its 1v or something so shows its in phase on both conductors too*
At first i thought the bridge rectifier was defective but test and all is okay.
Cheers for reading and any advice or comments you have .
Tom.
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