MOTIX™ MCU Forum Discussions

Infineon_TLE987x_UM_UserManual |27 节 ,关于这个电荷泵加在VSD和VCP之间的作用，请教一下，谢谢！

Hi,

In my project I want to apply the break with below FET status, will it be considered as break condition?

L1,H1,L2,H2  (Ch_en, Ch_off, Ch_en, Ch_off)  because I observed back electromotive current when I used below option:

(Ch_On, Ch_off, Ch_On, Ch_off).

Reference board is TLE9869.

Hi,

I want to understand the difference, between complementary FET firing and only one FET with PWM?  is there any effect on duty.

Hi all

TLE9879_EvalKit_BLDC_HALL 

The official program, adjust the motor speed using the potentiometer set Poti_Handler(), the motor can work normally. However, if  you set a fixed speed,  such as Emo_SetRefSpeed(1000)  , then when the motor starts, it needs to be turned by hand to enable the motor to start normally, otherwise it will not turn.

I've tried to debug the startup duty cycle and the PID parameters, but nothing works.

I hope I can get help.

BEST REGARDS

大家好。

TLE9879开发板，官方自带程序，调节速度使用电位器设定，电机能够正常工作。但是如果设定一个固定转速，比如Emo_SetRefSpeed(1000 )，那么电机启动的时候，需要用手转一下，电机才能够正常启动运转，否则就不转动。

已经试着调试过启动占空比，给定的速度，以及PID参数，都不管用。 

问下能够得到指点一下，感谢！

I have performed the DC Link short to GND in order to test 7th MOSFET (reverse polarity MOSFET) turn OFF time during fault condition in BLDC application. In this test, the DC link is short to GND and ultimately VDH pin of TLE9877 short to GND. The turn OFF time of the Gate voltage of the 7th MOSFET and the charge pump is around 500us even if I remove all the Software delays.
My questions are:
1. Why do I have this delay even though I don't have any Software delay?
2. What is happening inside TLE9877, when VDH pin short to GND?
3. How could I reduce this 500us delay to Zero?

NOTE: The charge pump (VCP) under voltage diagnosis is enabled with low voltage threshold 7.325V and filter time 16us.