josh brown

[josh brown]

Awesome, yea your Dad is pretty awesome, I watched that video, and it clarified a lot for me, all this time, I really didn’t understand how they really worked, now I have a much better understanding, Thanks again!

[josh brown]

Sam! Thanks, I’m assuming you’re the Samurais, Kid?
I think you could give your pops a run for his money!

Thanks for the clarification.

I have a couple other questions, hopefully I can figure out the quote thing.

A motor start capacitor (and indeed, any capacitor in an AC circuit) is constantly charging and discharging as the polarity reverses from positive to negative and back again.

Is this happening at 60hz?
Or just when the motor starts?
Or is that the wrong question to ask?

Actually, thats all the questions I have.
Im going to check out that webinar you linked, and I definitely need to review, I’ve been looking more into motors lately, and I realize there is still so much I don’t understand about them.

Thanks for the response!!

[josh brown]

Well looks like i didn’t do the quote thing correctly.
But…
I have another question,

On micro farads.
1. Does the higher the mfd, create a greater phase angle?
2. Does it hold a higher charge?

[josh brown]

Scott,
Been a long time!
I drifted off the topic for a bit, but always find myself coming back to it.
Thanks for the in-depth explanation, I have a couple other questions.

Not sure if i did the quote thing right?…

It works by increasing the electrical phase angle between the main winding voltage and the starting winding voltage. With motor, it’s not about zapping or kick-starting, as many people mistakenly believe. It’s all about phase angle. The greater the phase angle, the greater the starting torque.

So, I’ve heard some people call capacitors, “batteries”.
So does the capacitor hold a charge, and then when the motor is called to start, the capacitor releases that charge to the start winding? And thats what creates the phase angle?

Is that phase angle a literal angle? Like 60 degrees? Or is that just how it is described?

With Run capacitors, the motor doesn’t need help starting?
How does it start if its just alternating 60hz?

Thanks again!!

[josh brown]

Hey Susan, thanks for the follow up.
I do have a better understanding now, I’m getting ready to do the mid-term, and I have been studying the guide you provide.
Thanks again!!

[josh brown]

Scott I was also confused by this.
At 0:42 it talks about the compressor transferring (compressing) the refrigerant in gas form into the condenser coils where the gas is condensed into a hot liquid. Then the liquid moves into the evaporator coil where it is turns into a gas. Then, via a suction line the gas is drawn back into the compressor and the compressor (at 1:31) “converts the gas back into a liquid”.
So It kind of sounded like, in the video, that the gas is converted to liquid within the compressor… Instead of within the condenser coils…

[josh brown]

ok, yes it does make sense, I guess I was really just wondering if the PWM was actually DC voltage, or some type of other signal? Thank you for clarifying that it is DC

Are variable speed compressors considered BLDC? Or are they AC motors?

Thanks!

[josh brown]

Got it!
Thanks for the clarification!
Great work with the site by the way!

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