MOTIX™ MCU Forum Discussions

1. Whether to use ADC or comparator for counter electromotive force

2. Is it only necessary to change the pole pair number to change the motor?

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Hello everyone! There are a couple of phenomena regarding the parameterization of the motor for actual debugging, and I'd appreciate any advice.

1. Startup duty cycle, more than 35% or more, a large number of tests, there will be a probability of power-on direct overcurrent protection, and then the system strike, restart to work properly;

2.Kp Ki parameter design, as if there is not much law, according to Kp/Ki = L / R, this formula does not seem to be very right, because in general, L is particularly small, so must be too large a difference, is not a 2:1 relationship, but at present the test to see how to set up, will only affect the corresponding speed, the motor running stability has not been found to have any effect. Regarding the pi parameter, if there is any opinion, please point it out.

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I am developing CANFD in TLE9893 EVkit.

I am using example code in Tle9893 Reference Manual.

Normal can message TX/RX is OK!

But CanFD message Tx/RX not OK , If I try , occured "BUS OFF".

Pls , Help me.

screenshot

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大家好！

官方程序里的延时函数Delay_us(uint32 delay_time_us)，在实际测试时，有个奇怪的现象。

测试程序看门狗设置1008ms，测试程序延时方式如下：

1. Delay_us(500000); (void)WDT1_Service();     //延时500ms，喂狗
2. Delay_us(600000); (void)WDT1_Service();     //延时600ms，喂狗
3. Delay_us(1000000); (void)WDT1_Service(); //延时1000ms，喂狗

其中，1，3能正常工作，第2项延时600ms喂狗，程序没有喂狗成功，程序不工作。

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!

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Hi Sir,

想請問6EDL7141  OCP 與current amplifier 的位置關係

datasheet 的方塊圖OCP是在current amplifier之前

application note的方塊圖 OCP在current amplifier之後

請問何者是正確的呢?

謝謝!

https://www.infineon.com/dgdl/Infineon-6EDL7141-DataSheet-v01_08-EN.pdf?fileId=8ac78c8c8e7ead30018ec7bd6aac46f3

https://www.infineon.com/dgdl/Infineon-AN_2306_PL88_2307_181713_battery_powered_BLDC_motor_drive_design_using_the_6EDL71x1-ApplicationNotes-v01_00-EN.pdf?fileId=8ac78c8c8929aa4d0189915b093c5f87&da=t