- #1
XZ923
- 136
- 63
Hi, I'm trying to build a voltmeter that will simultaneously measure all three phases unloaded of a 3-phase permanent-magnet alternator off a motorcycle (Honda Goldwings mostly, not that that's relevant...) The way these are typically checked in the industry is to set a voltmeter to measure AC, disconnect the stator and measure the unloaded AC output Line 1-2, 2-3, 3-1. This is sometimes a pain to do in the garage so I'm looking to make a tool I can simply plug into the 3P outlet and read all three at the same time. The meter I use already is this:
http://www.ebay.com/itm/Blue-AC0-500V-LCD-Digital-Volt-Panel-Meter-Voltmeter-/111161235696?pt=LH_DefaultDomain_0&hash=item19e1b9d8f0
I've used this successfully as a single-phase meter for a while, so my though was to tie three of the together, powered by an independent 9-volt battery (when it says "power supply needed" the spec is 8-15VDC). I've attached a PDF of my proverbial tool and was just looking for input as to any design mistake I've made.
http://www.ebay.com/itm/Blue-AC0-500V-LCD-Digital-Volt-Panel-Meter-Voltmeter-/111161235696?pt=LH_DefaultDomain_0&hash=item19e1b9d8f0
I've used this successfully as a single-phase meter for a while, so my though was to tie three of the together, powered by an independent 9-volt battery (when it says "power supply needed" the spec is 8-15VDC). I've attached a PDF of my proverbial tool and was just looking for input as to any design mistake I've made.