BLDC motor controller using IR2101 mosfet driver

Thread Starter

KranthiKumarR

Joined Aug 27, 2017
13
Hello everyone,

I'm trying to design a motor controller
I'm trying to simulate the circuit in proteus
Issue I'm facing here is all the mosfets are turned on even when I'm giving only two inputs
Please find the screenshots and help me in understanding the circuit better
myc.PNG mos.PNG mos.PNG mos.PNG
 

jtn

Joined Mar 27, 2017
10
Troubleshoot your circuit one section at a time. Check the PWM signals input to Driver if they are phasing properly as you expected. Check signals after Driver. You could disconnect signals from Driver and inject AC pulses to FET to make sure the power section function properly
 

Thread Starter

KranthiKumarR

Joined Aug 27, 2017
13
Hi,

If have tried to simulate just one block and the outputs of IR2101 are not switching between high and low and are remaining constant , please find the screenshots
 

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jtn

Joined Mar 27, 2017
10
You rmodel looks correct. Eliminate the High Side Drive and High side FET. Just run the Low side FET to drive LS FET. If it doesn't work, something wrong with IR2101 model. Use different Driver model to check ig it works
 
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