Arduino EC Motor Control: BLDC with 0-10V PWM, Transistor BD139 & Regulator R-1/010 Integration

Question

I have an EC motor in the recuperator with 0-10V control. When the 10V jumper is closed with the 0-10V jumper, the engine works at maximum speed.

Can you control this voltage with arduino via PWM?
Is it enough to connect a transistor, e.g. BD139, to the PWM pin on the arduino?

I enclose a picture of how regular adjustment looks like with the Regulator R-1/010.

tmf · Answer

You can ordinary PWM + transistor to make 0-10V and RC filter on the output.

1wheler · Answer

Here I have the exact EC engine control scheme.
and all in all i have no idea how to connect this to the transistor. PWM from Arduino on Base ?? what about the rest??

edit.

I made the layout according to the attached diagram, it works. only has a disadvantage, when PWM is 0V, then output voltage is 10V and when PWM is 5V, output voltage is 0.2V.

Is it possible to build a system to increase Vwy as PWM increases.

Because in this option, if I turn off the arduino, the fan will run at maximum speed.

dondu · Answer

Change the PWM signal to the opposite with the program (see microcontroller documentation - search: inverting-mode).

1wheler · Answer

inverting-mode will only change for me from the side of the program, physically it will be the same.
at 0.2V base U; Uwy will be max

and I mean physical dependence, U control increases (base, PWM there) and Uwy increases simultaneously.

This can use LM538 ??

dondu · Answer

Think about what you write.
The transistor introduces signal inversion. It is enough to negate the PWM signal fed to the base of the transistor.
This is done by programming the PWM signal type in "inverting mode".

What would the LM538 do?

1wheler · Answer

I thought about it and supported what I wrote. What happens if I turn off the arduino or disconnect the PWM ???? Uwy will not be 0V, only 10V.

dondu · Answer

You haven't written about it before. What does it mean to disconnect PWM? Where How? Physically or programmatically?

tmf · Answer

Then add an additional negation. By the way, after turning on ATMega has all the pins as input, so just add a resistor polarizing the transistor and after the problem.

1wheler · Answer

I was building the layout from post # 3
at first I did tests without RC, but without connecting the EC motor
now I have attached the RC filter, and in the idle state of operation, the R680 heats up a lot.
I also have some concerns whether such a filter will quite effectively smooth the sine wave (I do not have an oscilloscope, so I will not check)
maybe some other sure way to drive an EC motor through arduino. (the fan alone cost PLN 950) so I don't want to release it.

raven5 · Answer

And who told you that Harmann EC fans are controlled by a pulse from the pwm comparator? , but there is clearly shown in the diagram and probably in the manual is also described that the change in speed occurs by adjusting the analog voltage from 0v to 10v. I have already worked on this topic some time ago it is probably just ebm papst blowers have both pwm dc and ec control. For this harmony you need a regular potentiometer and if you want to have a digital control then you need to look for some digital potentiometer.

1wheler · Answer

ok, the topic is over.
I know that the EC fan is not controlled by pwm, that's why the RC filter is installed.
I made the whole system as in the above scheme, instead of 680R I gave a 3k3 resistor and a BC337 transistor.
The whole is controlled with arduiono mini pro.
Speed control is smooth.
The goal has been achieved.
It is a control of the recuperator which I built on two EC 150/650 fans and a countercurrent exchanger.

cezarek2 · Answer

Hello gentlemen, I have a problem and I ask for advice. I have ebm papst ec fans controlled by pwm and a 0-10v signal driver from tech st-340 - how to reconcile it?

es2 · Answer

Use a second PWM to generate 0..5V and operational amplifier to multiply the voltage by 2. Naturally, pay attention to the amplifier's input and output voltage range.

cezarek2 · Answer

could you give exactly what to buy and how to connect it?

es2 · Answer

Naturally. It will take me an hour or two. How is the hourly rate for electronics now?

Anonymous · Answer

There is no need to use an operational amplifier to get a PWM signal with an amplitude of 10V ... (this is probably the requirements of this motor (?). Unnecessary complication of the system. All you need is an optocoupler pulled up with a 10V resistor and powered by a 5V PWM signal (resistor in the diode circuit!), Generated for example by Arduino. Only attention should be paid to the frequency of the PWM signal. Depending on the timer used (pin number), the default signal generated from Arduino is f = 490Hz (T1 and T2) or 980Hz (T0) which can be easily changed by editing the relevant registers. A higher frequency will probably be required to control the motor. Technical documentation of this ventilator may be helpful here. Nevertheless, for the tests I would advise starting from 3 kHz to 10 kHz. e marcus

es2 · Answer

This should be a voltage in the range of 0..10V and not a PWM signal with an amplitude of 10V. Of course, you can sculpt on transistors, give OC output, pull up to +10, then RC filter and buffer on the transistor. I prefer to give an operational amplifier.

Anonymous · Answer

You use one method (0 to 10 V analog signal) or PWM (10V) and not both at the same time. A smoothing filter (RC) is built into the controller part in the engine housing. Read more here: Find the fragment: in which or means alternative control, not simultaneous. Of course, you will give an operational amplifier in the ordered service contract. e marcus

es2 · Answer

No matter what method you use, you need to give 0..10V: Whether in the form of pulses or direct voltage. The R-1/010 regulator is a potentiometer for me (130 PLN).

Arduino EC Motor Control: BLDC with 0-10V PWM, Transistor BD139 & Regulator R-1/010 Integration

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