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Thread Tools | Display Modes |
12-31-2014, 02:35 PM
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#11 |
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Not Yet Wild
Join Date: Dec 2014
Posts: 13
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Re: 92 ezgo wont go
I'm showing no voltage between m- and the blue wire
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12-31-2014, 02:41 PM
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#12 |
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Not Yet Wild
Join Date: Dec 2014
Posts: 13
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Re: 92 ezgo wont go
Ok my voltage isn't dropping so I checked across m- and the blue wire and read 0. So am I not getting power to my controller?
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12-31-2014, 03:52 PM
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#13 | |
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Techno-Nerd
 Join Date: Jun 2011
Location: West Virginia
Posts: 19,654
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Re: 92 ezgo wont go
Quote:
I said move the test probe from M- to the blue wire, so it was easy to misread. Sorry. |
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12-31-2014, 03:57 PM
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#14 |
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Not Yet Wild
Join Date: Dec 2014
Posts: 13
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Re: 92 ezgo wont go
Ok sorry about that. Reading between the blue and b- I'm reading 38 volts
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12-31-2014, 04:02 PM
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#15 |
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Techno-Nerd
Join Date: Jun 2011
Location: West Virginia
Posts: 19,654
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Re: 92 ezgo wont go
FWIW: The control element in the controller (about a dozen MOSFETs connected in parallel) is located between the B- and M- terminals.
The output to the motor is PWM (Pules Width Modulated) DC whose duty-cycle varies from 0% to 100% as directed by the throttle signal. When the duty cycle is 0%, the control element is effectively an open, so you measure the full pack voltage across it if the high current circuit is intact. When the duty cycle is 100%, the control element is effectively a short, so you measure zero volts across it unless there is a current flowing through the high current loop. (The MOSFETs drop about 0.05V to 0.10V per 100A of current flow through them, so the voltage in a working system will be slightly more than Zero) |
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12-31-2014, 04:03 PM
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#16 | |
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Techno-Nerd
Join Date: Jun 2011
Location: West Virginia
Posts: 19,654
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Re: 92 ezgo wont go
Quote:
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12-31-2014, 04:06 PM
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#17 |
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Not Yet Wild
Join Date: Dec 2014
Posts: 13
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Re: 92 ezgo wont go
How do I check the throttle signal. Is that the black and white wires?
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12-31-2014, 04:18 PM
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#18 | |
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Techno-Nerd
Join Date: Jun 2011
Location: West Virginia
Posts: 19,654
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Re: 92 ezgo wont go
Quote:
You said you got 5000Ω between them earlier. Did it vary from about 0Ω with the pedal up to about 5000Ω with pedal down? |
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12-31-2014, 04:35 PM
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#19 |
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Not Yet Wild
Join Date: Dec 2014
Posts: 13
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Re: 92 ezgo wont go
Pedal up i have close to 0 And with pedal down I have 5000
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12-31-2014, 05:55 PM
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#20 | |
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Techno-Nerd
Join Date: Jun 2011
Location: West Virginia
Posts: 19,654
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Re: 92 ezgo wont go
Quote:
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