Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

brushless motor won't re-start - IR2110 control IC w/charge pump

Status
Not open for further replies.
E

EPL803

Newbie level 4
Joined
Feb 25, 2015
Messages
7
Helped
0
Reputation
0
Reaction score
0
Trophy points
1
Activity points
45
Hello, I use IR2110 to control power mosfet to power a three-phase brushless motor. I have to run the engine for a start. I mounted a charge pump that provides a voltage of 30V to VB but every time the PWM stop the engine does not start. VCC = + 15 = Vmot= + 24 PWM= 15 Khz
Every time I turn on the circuit the engine will not start: I lightly touch the tree to start working.
Can anyone help? thanks Luciano
 

I assume your motor is sensorless?
What algorithm are you using to identify the rotor position?
 

Thank you for your immediate response,
I use UCC3626. My engine has Hall sensors 120 °, two quadrant.
I believe that the problem is the management of the IR2110 in HO out that despite the bootstrap capacitor and a charge pump system, made with a 7 kHz oscillator, does not change status than its LIN. After turning on the circuit by increasing the voltage PWM you see out I always high and just moving the motor shaft that starts regularly. The current consumption is minimal and it seems to run very well. thanks Luciano
 

After turning on the circuit by increasing the voltage PWM you see out I always high and just moving the motor shaft that starts regularly.
Click to expand...
We actually don't "see" anything as long as you don't post the circuit and waveforms.
 

Hello, to start my testing I used the UCC3626 circuit application information Texas. I tried small changes but without result. I can not get to work HO out of IR2110.
I tried to drive the mosfet with MAX4427 and the motor can stop and start without problems. But I would like to understand how to work with IR2110.
Thanks for your time Luciano
 

Attachments

  • img579.jpg
    img579.jpg
    476.9 KB · Views: 115
  • img579.jpg
    img579.jpg
    476.9 KB · Views: 107

Hello, I finally solved the problem.
is very important to maintain the voltage VB and for this we need a pump charg I made with a frequency of about 8 kHz. When the power to give way to VB to bring the right tension I had to delay the start of the UCC3626 using a trigger smit 4093. For a second there remain high Coast of UCC3626 after which everything is ready ...
was very useful reading vs Forum and I was able to learn many things that led me to get the result. thanks Luciano
 

These are the waveforms: 1) Vb, 2) Vs, 3) to gate Hout.
The two images relate with engine ON and engine OFF.
When the engine is off you can better see the difference between VS and VB where Vb thanks to Charge Pump is polarized so that it can work in a continuous manner.
But now I formulate my question: the waveform obtained is correct in your opinion?
Should I try to clean again?
thanks Luciano
 

Attachments

  • _3104933.jpg
    _3104933.jpg
    670.4 KB · Views: 96
  • _3104931.jpg
    _3104931.jpg
    631.6 KB · Views: 97

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top