help with IR2110 chips

[Maglatron]

ok do you know any other way of making positive negative and vice versa, thanks for reply!

 

[Alec_t]

H-bridge.

 

[Maglatron]

can you modify the schematic or tell me how to modify the schematic so that the negative turns to positive please,? thanks I'm not to sure how to wire it so that the positive is negative and vice versa, could you have a crack at it?

 

[Maglatron]

im thinking of using a 1:1 transformer and a signal generator to make the ac from the 55dc and then rectify it back to dc with a diode bridge after the transformer the reason I want to have the polarity switched is because when I use the multimeter positive probe to positive line and negative probe to negative line, it reads +55v but only draws 0.65Amps. when I measure positive probe to negative line, and negative probe to negative line, it reads -55v but draws 1.25Amps!

 

[Maglatron]

I bought a new meter because the readings im getting do not match up with what should be happening. It arrives in two weeks!

 

[Alec_t]

Sorry, you've completely lost me. Changing V2 to a negative voltage (is that what you want?) would prevent the circuit working.

 

[bertus]

Hello,

As far as I can see you already have a H-bridge.

H-bridge - Wikipedia

en.wikipedia.org

Bertus

 

[Maglatron]

Sorry, you've completely lost me. Changing V2 to a negative voltage (is that what you want?) would prevent the circuit working.

Nevermind mate, I've got two meters and they are giving me different results so not sure whats going on, when I use the clamp meter and put it around the positive lead of the battery on the positive wire, it reads 3.4Amps and when I put the clamp around the negative it reads 1.37Amps so something is up and my other meter isn't a clamp meter, so can't measure the current because there is nowhere to put the probes in line, using this one, the out put when I put the probes positive to positive negative to negative the voltage reads -50volt and current -0.43Amps, and then when put the probes positive to negative and second probe negative to positive the voltage reads +50volts and the amps are 0.82Amps with the clamp meter p - p, n - n the voltage reads -50volts and the amps -0.43Amps, and then if p - n, n - p the amps read +1.15Amps BUT the amps should read the same number regardless and just have opposite signs! so I have invested in a better meter! to see whats going on!
either way in both cases I get the desired 20watts needed!
just to add, because the results are better positive to negative, negative to positive of the probes to the output I wanted to use the higher current from the negative line I wanted to flip the polarity!

 

[Maglatron]

Sorry, you've completely lost me. Changing V2 to a negative voltage (is that what you want?) would prevent the circuit working.

I found that out when trying to simulate in spice!!

 

[Maglatron]

Hello,

As far as I can see you already have a H-bridge.

H-bridge - Wikipedia

en.wikipedia.org

Bertus

Hi there bertus, do you know the order that I should turn on the arduino signal generator to the IR2110 Hbridge, turn on the power to the Hbridge, and the 55v to be inverted to ac? thanks
yay, nay?

 

[bertus]

Hello,

With M2 and M3 activated will be one direction of the current.
With M1 and M4 activated will be the other direction of the current.

Bertus

 

[Maglatron]

Hello,

With M2 and M3 activated will be one direction of the current.
With M1 and M4 activated will be the other direction of the current.

Bertus

ok cool thanks for that! so do you know which order you turn on the circuit, then the arduino signals, then the 55v to be inverted? thanks

 

[bertus]

Hello,

Does this page help?

Arduino IR2110 Based H-Bridge HIGH Voltage Motor Control

Fully functional h-bridge motor control using 2 IR2110 half-bridge drivers. Tested using Arduino.

www.bristolwatch.com

And a more extended explanation here:

Tahmid's H Bridge - Does it work?

Hi, In the following days i'm planning to build an H bridge to help a friend that needs to control speed on a DC motor of 12V and around 6A nominal. I have been searching information on the past weeks on how these bridges operate with mosfets and IGBT's, but I want to ask for an expert if this...

forum.arduino.cc

Bertus

 

[Maglatron]

Hello,

Does this page help?

Arduino IR2110 Based H-Bridge HIGH Voltage Motor Control

Fully functional h-bridge motor control using 2 IR2110 half-bridge drivers. Tested using Arduino.

www.bristolwatch.com

And a more extended explanation here:

Tahmid's H Bridge - Does it work?

Hi, In the following days i'm planning to build an H bridge to help a friend that needs to control speed on a DC motor of 12V and around 6A nominal. I have been searching information on the past weeks on how these bridges operate with mosfets and IGBT's, but I want to ask for an expert if this...

forum.arduino.cc

Bertus

found it!!!

When dealing with an H-bridge circuit, especially when inverting a high voltage like 55VDC, the sequence in which you power up the components is important to avoid damaging them. Here's a recommended power-up sequence:

1. Arduino Power On:
   • Start by powering up your Arduino. Ensure that it is properly connected and powered.
   • Allow the Arduino to complete its initialization process.
2. IR2110 Power On:
   • After the Arduino has powered up, you can apply power to the IR2110 drivers.
   • This ensures that the control signals from the Arduino are not applied to the IR2110 drivers until they are fully operational.
3. Apply 55VDC Power:
   • Once the IR2110 drivers are powered up, you can then apply the 55VDC power to the H-bridge circuit.
   • Ensure that the 55VDC power supply is stable and within the operating limits of your components.

By following this sequence, you reduce the risk of applying control signals to the IR2110 drivers before they are ready. It's generally good practice to power up the low-voltage control components before applying power to high-voltage sections.
When shutting down the system, you should follow the reverse sequence:

1. Disconnect 55VDC Power:
   • First, disconnect the 55VDC power supply.
   • Ensure that the circuit has had sufficient time to settle before proceeding to the next steps.
2. Turn Off IR2110 Power:
   • Turn off the power to the IR2110 drivers.
3. Turn Off Arduino:
   • Finally, turn off the power to the Arduino.

This sequence helps ensure a safe startup and shutdown procedure for your H-bridge circuit. Always check the datasheets for your components and ensure that you are within their specified operating conditions. If there are any specific requirements or recommendations in the datasheets, follow those guidelines.

 

[Maglatron]

thank you very informative

And a more extended explanation here:

Tahmid's H Bridge - Does it work?

Hi, In the following days i'm planning to build an H bridge to help a friend that needs to control speed on a DC motor of 12V and around 6A nominal. I have been searching information on the past weeks on how these bridges operate with mosfets and IGBT's, but I want to ask for an expert if this...

forum.arduino.cc

I edited the circuit with the alterations suggested which is better in your opinion?

 

[Maglatron]

I want to add a power on LED does anyone know how?

 

[Martaine2005]

Probably the simplest is from the 5V regulator (U3) with obviously a current limiting resistor.

 

[Maglatron]

nice one matey!

 

[Maglatron]

so I think I've spotted a flaw in the schematic peak to peak is around 480volt but I need it to be 230volt! please help, the input to the transformer is still 55voltAC, the transformer is ratio 1:4.2 so need to make changes peak to peak should be around 230volt
edit: nevermind what I just said it is fine, got confused for a second! was going off of this image but this image shows me that it's correct

 

[Maglatron]

and this