I came to the forum looking for some help in solving a circuit problem that I am having. The basic circuit is taking 26v AC power supplied from an accessory circuit on a portable welder (not the main welding circuit) rectifying it with a bridge rectifier, and then using it to power a 24V DC motor.
My challenge is that when I add a capacitor in parallel after the rectifier, the voltage in the circuit goes up to 42V. I am using a Digital multimeter to check my voltages. Without the capacitor the voltmeter shows 24v after the rectifier. This seems to happen regardless of what size capacitors I hook up, (33 uF, 2000 uF) What I am suspecting is that I have some stray AC voltage that goes undetected on the AC side of the circuit.
After the it is rectified and capacitors are added it becomes measurable. Is this possible?
The 26V AC power supply shares a neutral wire with the 115V AC accessory circuit on the welder. This is making me wonder if I have some voltage somehow back feeding into my circuit.
My challenge is that when I add a capacitor in parallel after the rectifier, the voltage in the circuit goes up to 42V. I am using a Digital multimeter to check my voltages. Without the capacitor the voltmeter shows 24v after the rectifier. This seems to happen regardless of what size capacitors I hook up, (33 uF, 2000 uF) What I am suspecting is that I have some stray AC voltage that goes undetected on the AC side of the circuit.
After the it is rectified and capacitors are added it becomes measurable. Is this possible?
The 26V AC power supply shares a neutral wire with the 115V AC accessory circuit on the welder. This is making me wonder if I have some voltage somehow back feeding into my circuit.