High-Wattaged Ballast
10-16-03, 08:20 AM
#16
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Operation of the Controller
The operation of the Controller as follows.
1. Detect V2 corresponding to the lamp voltage by "voltage detecter" VDT, and get the voltage signal VVL. Detect I2 corresponding to the lamp current by "current detecter" IDT, and get the current signal VIL.
2. Generate VWR corresponding to the target wattage by "reference wattage generator" WREF. And divide VWR by VVL, and get the the target current signal VIR.
3. Estimate the error signal VER corresponding to the difference of VIL and VIR by "error amplifier" EA. And then, adjust the duty ratio of BLS by "Pulse Width Modulator" (PWM).
1. Detect V2 corresponding to the lamp voltage by "voltage detecter" VDT, and get the voltage signal VVL. Detect I2 corresponding to the lamp current by "current detecter" IDT, and get the current signal VIL.
2. Generate VWR corresponding to the target wattage by "reference wattage generator" WREF. And divide VWR by VVL, and get the the target current signal VIR.
3. Estimate the error signal VER corresponding to the difference of VIL and VIR by "error amplifier" EA. And then, adjust the duty ratio of BLS by "Pulse Width Modulator" (PWM).
Last edited by SOARISTO; 10-16-03 at 08:52 AM.
10-17-03, 04:14 PM
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What Defines?
Originally posted by lcc014
Very good explanation. Please also include the procedure of the circuit/part that you modified to achieve vary wattage output. The resistor that you replaced may not be the same in different brand of ballast, but the idea is the same. What is the size of the potentiometer that you used to change the power output ??
Very good explanation. Please also include the procedure of the circuit/part that you modified to achieve vary wattage output. The resistor that you replaced may not be the same in different brand of ballast, but the idea is the same. What is the size of the potentiometer that you used to change the power output ??
What defines the output power (wattage) of the ballast?
Yes, "Reference Wattage Generator" WREF dose!
VWR which is generated by WREF specifies the target wattage of the ballast. The brightness changes as VWR is changed. So, you can control the brightness by replacing a tip register to a volume register, in order to change the voltage of VWR.
This method is applicable also to other makers' ballast.
Last edited by SOARISTO; 10-17-03 at 05:51 PM.
I've made your Q45 brackets,worked out good.I want to try this mod too.Have two ballast I can try it on. 
03-01-06, 08:58 PM
#20
I'm going in on the real deal.Had to try it on the dead ballast first.The resistor is made of some sort of ceramic mat'l.Will post picture of how I bend way all in the way.Hope I don't mess it up. Here are some pictures.So all I have to do is attach two wire to where the ceramic resistor was?Right.and put the volume ***.Right.
http://halloweenbash4.com/denso_ballast/
Look at img 1288 thru 1294
http://halloweenbash4.com/denso_ballast/
Look at img 1288 thru 1294
03-01-06, 10:04 PM
#21
im not trying to rain on your parade or anything but why would you need to make those HIDs bighter? , my 4300k 35w HIDs are already quite blinding. it would be like driving with my highbeams on all the time.
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