12v DC direct to DCCD?

xCatch22x · 05-15-2008, 05:56 PM

What is the effect of this? Do I just get the diff at 100% lock or will it burn out?

If I dont have a controller then is there a way to limit the current to the coil to stop it burning out?

Cheers,

Wayne.

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DS1 · 05-15-2008, 06:10 PM

Burns out, one of my customers tried that.

MasterKwan · 05-15-2008, 06:38 PM

Interesting. I know the controllers send a duty cycle to the DCCD clutch. Basically 12 volts all the time's 100% duty cycle. Wonder what the max duty cycle the clutches see in real life?

I run my car at the track with an open center diff (no controller). Locking the center diff and driving like that 100% of the time will probably destroy your drivetrain, just like it would in a part time 4WD truck.

Spiider · 05-15-2008, 09:28 PM

I run my duty cycle in all my products to exactly the maximum of what Subaru does....it's no where near 100%.

a6n6d6y · 05-18-2008, 11:43 AM

place a resistor in the circuit so as not to burnout the solenoid

MasterKwan · 05-18-2008, 04:44 PM

Lets say you want 4 volts on the clutch. That's 14-4 volts or 10 volts dropped across the resister. Lets say the clutch needs 3 amps to actually activate (it's probably higher).

I * E = W

10 volts * 3 amps = 30 watts of power.

R = E/I

R = 10/3
R = 3 ohms.

So, you'd want probably a 3 ohm 30-60 watt resistor to be safe.

05-15-2008, 05:56 PM	#1
xCatch22x Scooby Newbie Member#: 109018 Join Date: Mar 2006	12v DC direct to DCCD? What is the effect of this? Do I just get the diff at 100% lock or will it burn out? If I dont have a controller then is there a way to limit the current to the coil to stop it burning out? Cheers, Wayne. * Registered users of the site do not see these ads.

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05-15-2008, 06:10 PM	#2
DS1 Vendor Member#: 111780 Join Date: Apr 2006 Chapter/Region: MWSOC Location: Schaumburg, IL	Burns out, one of my customers tried that.

05-15-2008, 06:38 PM	#3
MasterKwan Scooby Guru Member#: 98961 Join Date: Oct 2005 Chapter/Region: MAIC Location: NOVA Vehicle: 2003 WRX Black	Interesting. I know the controllers send a duty cycle to the DCCD clutch. Basically 12 volts all the time's 100% duty cycle. Wonder what the max duty cycle the clutches see in real life? I run my car at the track with an open center diff (no controller). Locking the center diff and driving like that 100% of the time will probably destroy your drivetrain, just like it would in a part time 4WD truck.

05-15-2008, 09:28 PM	#4
Spiider Scooby Newbie Member#: 13680 Join Date: Dec 2001 Location: DCCDPro.com Vehicle: 2002 WRX WRB	I run my duty cycle in all my products to exactly the maximum of what Subaru does....it's no where near 100%.

05-18-2008, 11:43 AM	#5
a6n6d6y Scooby Specialist Member#: 123347 Join Date: Aug 2006 Chapter/Region: NWIC Location: SEATTLE Vehicle: 1993 POS burgandy legacy	place a resistor in the circuit so as not to burnout the solenoid

05-18-2008, 04:44 PM	#6
MasterKwan Scooby Guru Member#: 98961 Join Date: Oct 2005 Chapter/Region: MAIC Location: NOVA Vehicle: 2003 WRX Black	Lets say you want 4 volts on the clutch. That's 14-4 volts or 10 volts dropped across the resister. Lets say the clutch needs 3 amps to actually activate (it's probably higher). I * E = W 10 volts * 3 amps = 30 watts of power. R = E/I R = 10/3 R = 3 ohms. So, you'd want probably a 3 ohm 30-60 watt resistor to be safe.