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Hello..
During my last measurements I used the my power supply circuit input on to Siglent SPD3303X laboratory
power supply. The Siglent laboratory power supply had very low ripples and
Noise. For this reason, I have the power supply circuit again under real conditions
tested on a toroidal transformer.
Now I have connected the power supply circuit to a toroidal transformer with 160VA 2x15V / 5A
to measure the Rippel & Noise. I only used a transformer winding with 15VCA for the measurement.
According to the data sheet, the LM317HV can handle a maximum input voltage of 60V. With a change
voltage of 2x15VAC, the voltage at the rectifier is 42V. A standard type of the LM317
only tolerates 40V.
circuit
With an output load of 3A and 10Volt I have a Rippel & Noise of 2Vpp on the rectifier
measured. The LM317HV has a ripple rejection ratio of typically 65dB (factor 1778) power
Adam Riese at the output of the regulator approx. 1mV Rippel & Noise. According to the data sheet, you can use the ripple
Improve & Noise with a 10uF electrolytic capacitor at the adj connector of the controller to a maximum of 80dB (factor 10,000).
Vin no load (measured at C2)
Vin 3A Load (measured at C2)
Vout 3A Load (measured on C6)
Greetings Rolf -
Thanks Rolf anyway yes it is different, I had to use some brain power and work it out...100k !!
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Very good for the green world
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Hello..
I have also examined the switch-on and switch-off behavior on the power supply (Power switch).
The result is very well. An overshoot is not noticeable.
Power On No Load
Power On 3A Load
Power Off 3A Load
It is recommended to add a resistor of 2.2KOhm to the power supply output,
so that the voltage at the output can discharge after switching off. At a maximum
Output voltage of 32V, for example, the resistor should have a power of at least 0.5Watt.
Greetings Rolf -
Hello..
Just got the 50Ohm adapter for my scope and again a load measurement
10V / 3A made. Result approx. 2mVpp Ripple & Noise (see picture).
50Ohm BNC measuring adapter for the scope
Ripple & Noise 10V / 3A Load
Greetings Rolf -
... Just got the 50 Ohm adapter for my scope and again a load measurement 10V / 3A made. ...
10V / 50 Ohm = 2W !
You have 1W adapter.
Think about it, Rolf... -
If it's not smoking he's good.
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Yes you are right. But it was only a short measurement time.
Next time I measure with 5Volt
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Hello..
My power supply circuit with the LM317 has a little problem. she can
are not readily reduced to 0 volts. Try the
Output voltage at the ADJ pin with an OpAmp and negative operating voltages was not very special
successful.
For this reason, I continued to look for another solution.
The following power supply circuit comes from ELV and controls the
Power transistors with a constant current source (R1, R2, R3 and T1).
This allows the output voltage from 0-30V to be easily via a
Standard operational amplifier IC3 and IC4 with + -5V supply voltage
regulate.
Link:
https://de.elv.com/elv-prozessor-netzteil-pps-5330-komplettbausatz-075572
The special thing about the circuit is the separate power supply for
Control and load circuit as well as current and voltage control via one
Microcontroller.
I was particularly interested in the control loop for the output voltage, because
I want to control it via the RD6006 controller. The circuit did
I built it on a test board. As a power transistor, I have
used a 2N6284 Darlington transistor. The operating voltage of
+ 32V + 5V and the control voltage of 0-2.0 volts provided a siglent
SPD3303X laboratory power supply. The negative supply voltage for the
Operational amplifier supplied an LT1054 voltage converter.
Video: https://youtu.be/OXn64HzqIYY
Greetings Rolf -
Hi,
There are now 2 RD power supplies. The first one at 6A max and the new one at 12A. Abilities are very close.
This ad present the two datasheets : http://www.aliexpress.com/item/4001053200176.html
Mains differences are :
- price 110eur (for RD6006) and 150eur (for RD6012)
- weight 607g and 642g. The heaviest is maybe more durable, for the same current load, at about 4A.
- ammeter resolution : 1mA and 10mA. Do you use this 1mA resolution inside a power supply ? I can read multimeter-ammeter data on my laptop.
- current charge, low limit is 10mA and 100mA. Is this function useful ? low limit 100mA seems very high ?
Are both a tension consign and a current consign not suffisant in order to charge a battery (with a diode) ?
- noise output tension : 100mV and 250mV ?
Lower is better ! but I don't know if theses values create issues that I can't solve with a electrolytic capacity (often 100µF), I don't play with RF.
- fan start condition higher for the RD6012 : 4A and 8A.
Do you have any advice for an hobby use. -
Price 100+ EUR is probably for the whole kit including the module itself, power supply and enclosure
Regarding charge termination current, 100mA is more useful as for most Li-Ion of reasonable capacity it is close to datasheet values. 10 mA is way too low. But this should be a setting, not a hardcoded parameter. -
Ripple and noise to an RD6012 is very high 250mV. I build a new power supply with PPS 5330 power board and RD6006 controller. I change the PPS Pannel to RD6006 pannel without Step Up converter.
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Hello
I recorded my test circuit once. Q2 is the
Constant current source and ensures that the power transistor Q1
is opened. The operational amplifier X2 controls the diode D11
Current flow at the base of Q1. If the control voltage Vctrl at X3
the output voltage at X2 drops less and thus the current flow
the basis of Q1. Part of the control current now flows through the diode
D11 and the output of X2. If the control voltage is 0V, the
complete current through D11 and closes the power transistor Q1.
The operational amplifiers are operated with an operating voltage of + -5V
provided. The LT1054 generates the necessary -5V. I am aware of
decided for a transformer with one winding, because I also have the
RD6006 controller must supply a positive voltage.
What you have to pay attention to is the following: The GND potential of the
Control electronics is not connected to the -pole of the output voltage,
especially with the + pole of the output voltage. If not, then
the circuit does not work.
Greetings Rolf -
My next step ..
I actually wanted the necessary components for the power supply separately
to order. But only the costs for the hollow-rib fan unit
were already around 70 euros. And if you still have a suitable housing
and if you add the necessary small items, you can quickly get to 100 euros
or more.
ELV PPS5330 Origin
PPS5330 electrinics
PPS5330 with RD6006 control
For this reason, I chose a complete power supply kit
PPS5330 decided by ELV. This kit contains everything I need
my RD6006 power supply including housing. The complete control
of the PPS5330 power supply is then taken over by the RD6006 controller
USB and WLAN interface. The whole thing could look like this (1st picture).
Maybe I'll make a new front panel too.
Greetings Rolf -
Hello..
Great joy and a little disappointment. The power supply kit from ELV
arrived today and I can use the long weekend to
Solder circuit boards and then assemble the power supply.
PPS 5330 Front case
Unfortunately, when unpacking, I found that the front frame
something is bent. However, I think I have the front frame again
can set up and then the assembly works without further problems.
Greetings Rolf -
So .. base board works.
It was a bit difficult to assemble the cooling unit and attach the
Power transistors including white hands from the thermal paste ..
But everything worked out with a little patience and calm.
PPS 5330 Basic board and transformer
To test the function of the basic board without the front board (MCU), I did
two separate control voltages of 0-5 volts on the connection pins
U target and I target placed. I was then able to release current and voltage
to adjust.
PPS 5330 Basic board circuit
I did a short stress test. Voltage and current are
stable. So far everything is ok. The cooling unit gets evenly warm.
The next step is to solder the front panel and install it in the
Casing.
Greetings Rolf -
Hello friends
My PPS 5330 power supply is now ready. Here are some measurements and my Video.
PPS 5330 DIY Power supply
Rippel & Noise no Load
Rippel & Noise 3A Load
1A Load peak
3A Load peak
3A Load off peak
Power Up with 1A Load
Power Down with 1A Load
Power Down without Load
Here my Video https://youtu.be/MjL6gLWncd4
Have fun for watching. Regards Rolf -
Hello..
It is not necessary to replace the LDC display. At the
I made a mistake assembling. The silver coated
I have the side of the reflector disc on the side of the LED lamps
directionally installed. The light could not shine on the
Reflocter disk seem. I have rotated the reflector disc by 180 *
and now the LCD display lights up in all its glory smile
Installation of the LCD display
DIY manual in german
Front view with LCD backlight
Front view with incorrectly mounted LCD display
Greetings Rolf -
Hello..
I wanted to test when the overtemp. The temperature protection indicator in the power supply starts to flash. At 82 degrees on the cooling unit, I measured ..
I made a video. Link: https://youtu.be/GwYWNdFv-LQ
Greetings Rolf -
Hello all,
Has anyone been able to get the keypad unlocked while communicating over serial. The RD6006 seems to ignore the keyboard lock register when communicating over serial. It doesn't make much sense to me why they would perma-lock the keypad while communicating over serial. Any ideas to get the keypad function while communicating?
Thanks! -
Quote from: jasonshepherd19 on June 20, 2020, 04:59:53 am
Has anyone been able to get the keypad unlocked while communicating over serial. The RD6006 seems to ignore the keyboard lock register when communicating over serial. It doesn't make much sense to me why they would perma-lock the keypad while communicating over serial. Any ideas to get the keypad function while communicating?
This blocks is made inside firmware, any received command on serial port (WIFI/TTL) will lock the keypad for some time...
Cause the software make requests continuously, so you get locked keypad until stop the software.
There is no simple ways to change it, only if patch the firmware.
I recovered firmware source code of RD6006...
Here is my beta version, if anyone interested.
https://mega.nz/file/ZW5CwYTA#jnOAoec-fOpXhUFWO4UaH2lWeLCYNT0LEmase0Oa9aM
You can always return to stock firmware at anytime.
RD60062_V1.28.1.bin - my custom beta firmware.
RD60062_V1.28.bin - original (stock) firmware.
Still have some limits!
Cause I still didn't debug WIFI initialization, so temporary just disable that code. So WIFI will not work!
Maybe in future I will add it (if anyone will need it)...
What was changed:
The menu was complete remade, now I can easy add new items.
And now it looks better:
SHIFT + Left/Right — switches the current style (without save in settings)
(if need to set style after power on, then can do it over settings menu, as before).
For 'style 1', can be enabled/disabled items.
Other Styles:
Added OPP (Over Power Protection).
SHIFT + MEM — used to setup OPP
OVP, OCP, OPP — now can be disabled by setting it to 0
When entering OVP, OCP, OPP, SHIFT button will be highlighted as well
(to visually distinguish input: V-SET from OVP, I-SET from OCP).
The RIGHT button now works as a Backspace when typing.
When turned on the internal fan (the one that is on the module itself), icon will be displayed.
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Hi UniSoft!
Your work looks impressive!
Is it also possible to add a setting for current cutoff in battery charger mode? In the original firmware, preset value of 10mA is not very useful, it would be really nice to have possibility to set the limit as needed -
Is it also possible to add a setting for current cutoff in battery charger mode?
Yes, sure...
Give me more info... What range do you need?
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That's great!
I think you can make the setting range equal to the whole current range here (can't do too much harm with setting too big). It is also good to have this value visible on screen (maybe dedicated screen layout for charging batteries with all relevant settings and measurements- V-set, I-set, I-off, Ah, Wh, battery temperature). The value of battery voltage in RD6006 is meaningless, it's just the output voltage reduced by a fixed bias (0.05V IIRC), so no much sense to display it (IMO).
As an absolute extra I could imagine to have an additional setting to turn charging off if the battery temp exceeds the set value. But it's not that important.
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This is great! Really impressive work! This custom firmware looks great. I'll definitely be installing it later on my RD6006. The source code would fit really well on github, if it isn't already and if you have time/want to. I'm sure once people have a base they would happily contribute to it. Really cool project overall!
As for the keypad, any chance you could patch the firmware to enable the keypad while communicating with the computer? Or would something bad happen? Thanks!