On Thursday, 21 March 2019 10:35:28 UTC, J.B. Wood wrote:
On 3/20/19 9:49 PM, tabbypurr wrote:
On Wednesday, 20 March 2019 14:56:16 UTC, J.B. Wood wrote:
On 3/20/19 6:57 AM, J.B. Wood wrote:

Hello, all.Â* This isn't a repair question but, not having seen any
circuit schematics, I've been wondering what circuitry constitutes the
time base (what governs the 60 Hz AC output freq) in consumer inverter
generators (e.g. the Honda EU series)?Â* Is it crystal-controlled or
something else? I'm assuming it depends on the inverter portion itself,
not the rpm of the engine.Â* Since these appliances are designed to
function in a variety of temperature/humidity environments I would think
frequency stability is important.Â* Thanks for your time and comment.
Sincerely,

Hello, all and I appreciate the responses thus far, but my assumption
about the inner workings of these appliances is that the output voltage
and frequency is independent of the rotational speed of the
engine-driven generator portion. The generator's function is to supply
DC input to the inverter which in turn provides the 120/240 VAC output..
I'm assuming the same/similar circuitry as that of an inverter designed
for connection to a motor vehicle battery. So what component(s) control
the inverter generator's output frequency to the required degree of
accuracy? Sincerely,

Whatever components the designer chose to use in said oscillator. It could be anything, but a crystal is unlikely, they cost at least a penny more..


NT


Hello, and I already addressed your other post. I think a crystal is
probably likely. You said it was unlikely but don't offer sensible
reason(s) why (e.g. temperature and vibration stability, etc)

cost, as I said.

Lacking
knowledge of the internals, you might ust as well have said "They use
whatever they need to use". Not exactly an erudite response. Sincerely,

sorry to hear the reality doesn't meet your approval.