Multisim simulation IR2103

深情不及久伴

Multisim simulation IR2103 [Copy link]

 

I used multisim to make a driver simulation, but I don't know where the problem is. When the signal generator outputs a square wave, it says there is a problem with the simulation. I have been looking for it for a day, but still can't find the problem. I hope the experts passing by can take a look at


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深情不及久伴

qwqwqw2088

Should post screenshots, it's multisim14 version, not all netizens use multisim

深情不及久伴

qwqwqw2088 posted on 2020-4-27 21:39 You should post a screenshot. This is the multisim14 version. Not all netizens use multisim

Brother, on the 2nd floor

qwqwqw2088

Deep affection is not as good as long-term companionship. Posted on 2020-4-27 21:46 Brother, on the second floor

The circuit is a full-bridge driver

Only one IR2104 signal is given, it cannot work

The work of a single 2104 should be that the high-end Ho signal is consistent with the IN signal waveform, and the low-end Lo waveform is in anti-phase with the IN waveform.

Two 2104 drive full bridge drives have upper and lower arm dead time to work

深情不及久伴

qwqwqw2088 posted on 2020-4-27 22:36 The circuit is a full-bridge driver that only gives one IR2104 signal and cannot work. The work of a single 2104 should be the high-end Ho signal and the IN signal waveform...

Hi, I don't quite understand. I use an IR2104 to control the two MOS on the right. As long as the MOS on the lower right corner is turned on, it will be OK if it is given a high level. Therefore, I connected one IR2104 to the ground, so Lo outputs a high level and HO outputs a low level. The other IR2104 is controlled by PWM. Why can't this be done? Please advise.

qwqwqw2088

Deep affection is not as good as long-term companionship published on 2020-4-28 07:32 Hello brother, I don’t quite understand. I use an IR2104 to control the two MOS on the right. As long as the MOS in the lower right corner is turned on and a high level is given, it will be fine soon...

Since it is a simulation, put a few more oscilloscopes to see what the input signal output looks like.

深情不及久伴

qwqwqw2088 posted on 2020-4-28 07:38 Since it is a simulation, put a few more oscilloscopes to see what the input signal output looks like

I added an inverter, but it still doesn't work.

qwqwqw2088

The requirement for the square wave is that when the control signals of the two 2104 are in opposite phases, the upper and lower arms are switched on alternately, and the motor works.

Note that the SD signal can only be driven when it is high

深情不及久伴

qwqwqw2088 Published on 2020-4-28 08:02 The requirement for the square wave is that when the control signals of the two 2104 are in opposite phases, the upper and lower arms are turned on alternately. When the motor is working, pay attention to the SD signal being high before it can be driven...

Yes, please look at the picture I sent. I have always connected SD to a high level, and the two IR outputs pass through the inverter. Please see what else needs to be changed.

rudy233

Is it solved, bro?

rudy233

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