MOTIX™ MCU Forum Discussions

Hello everyone! I have some questions about tle9879 driver bldc, pwm frequency selection, and would like to get answers.

For the same motor, the motor inductance parameter is measured and the results are measured:

Frequency 1khz ------Ls-900uH Lr-0.8Ω

Frequency 10khz ------Ls-880uH Lr-5.4Ω

Frequency 15khz ------Ls-850uH Lr-10.2Ω

Frequency 20khz ------Ls-830uH Lr-16.1Ω

If you look at it according to impedance, the lower the frequency, the lower the impedance, then the greater the output capability of the motor; conversely, if the frequency is high and the impedance is high, then the output capability will be reduced.

But the actual test to see, the results are not so, ccu6- >T12 is also on the pwm setting frequency 10hkz when the carry capacity is very weak, a little bit of load may be held back; and 20khz than 10khz carry capacity is much stronger. Here may have something to do with the renewal current, but exactly what is not understand.

Anyone who understands the relationship between frequency and torque would be grateful for an answer!

smartconx_target@Q!w2e3r4t5y6u7i8o9p0||/t5/MOTIX-MCU/BLDC-PWM%E9%A2%91%E7%8E%87%E5%92%8C%E6%89%AD%E7%9F%A9%E7%9A%84%E9%80%89%E6%8B%A9/td-p/742036

Hello,

I'm buying the TLE9879 from Digikey, do they come with pre-programmed BLDC Driver? (same as the one on the Arduino shield).

If not, where can I order pre-programmed chip?

Thanks in advance.

Best,

Thai.

Hi, 

I am using a malloc and calloc functionality for a DAQ implementation purpose. I am using TLE9893 series chip . the code compile well but seems to stuck while in debug mode on calloc and malloc function. I tried to set heap size to 16K but didnt work. Any suggestions/alternative method of using this. !! 

I am not looking for any optimistic memory allocation, just need a basic memory allocation method. 

Thanks

Prakash 

Hi

One of my client is looking for flush door handle to drive 12V/1A motor with minimal circuitry using full bridge topology & required inbuilt LDO / LIN Communication & if mosfet inbuilt will be better.

I have chosen TLE9853QX + IPG20N04S4-18A to support here. Any other recommendation let me know.

Regards

Lucky Kumar