About Nikolaj_TL

Nikolaj_TL · 2025-01-16

I am running a bluetooth application using freeRTOS on a Nucleo-WB55 (STM32WB55RG). I am in the process of implementing Emulated EEPROM (X-Cube-EEPROM) to store som data. After implementing eeprom emulated in a ble_heartrate_freertos example I have h...

Nikolaj_TL · 2024-11-29

I have a custom board, which is based on the STEVAL-SPIN3201, it is used to control a low inductance BLDC motor with hall-sensors (100µH). The motor controller is running and is able to control the motor. Unfortunately the phase currents tell that th...

Nikolaj_TL · 2024-08-08

I have a custom board with a STMWB55 (master) and a STM32F031 (slave). They communicate over SPI using DMA. Unforturenately there are communication problems. In order to identify the problem I have simplified the setup. I have used a ST NUCLEO-F031...

Nikolaj_TL · 2024-06-18

Hello ST Community, I have setup a SPI master and a SPI slave, both use DMA in Normal mode. The word size is 8-bits and the data size is 8-bytes. The problem is that the slave transmits messages which contains old data. When it should send:MISO: { 0x...

Nikolaj_TL · 2024-04-08

Hello, I am working on a motor control project that is to be driven battery-powered. This means that the DC current has to be monitored in order to avoid overloading the battery. I have made a Control Loop which takes in a DC Current reference as inp...

Nikolaj_TL · 2025-01-10

Hello @Gael A,For a given electrical speed, the frequency at which the max duty window is switched is the same, whatever the PWM frequency. I suspect that higher PWM frequencies are subject to other sources of noise as well. This was the reason for c...

Nikolaj_TL · 2025-01-07

Hello @Gael A, I have investigated the samplings cases for different PWM frequencies and excecution rates.10kHz, 1 exec. rate20kHz, 2 exec. rate15kHz, 1 exec. rate30kHz, 2 exec. rateAt lower PWM frequencies (10kHz & 15kHz, at intermediate load) ADC s...

Nikolaj_TL · 2024-12-10

Hello @Gael A, I have tried to increase the deadtime (SW_DEADTIME_NS from 850ns to 1200ns) but without any effect on the current instabilities. Yes, the pin toggle is delayed by the ADC Conversion Time of Second Sampling + DMA Transfer time + ToggleP...

Nikolaj_TL · 2024-12-09

Hello @Gael A,The total estimated sampling time in my case is (as you mentioned):(ADC_TRIG_CONV_LATENCY_CYCLES + ADC_SAMPLING_CYCLES*2 + ADC_SAR_CYCLES)/ADC_CLK_MHz(4+7.5*2+12.5)/14MHz = 2.25µsNumbers from MCWB SDK are based on ds10111.stm32f031c6 Ta...

Nikolaj_TL · 2024-12-05

Hello @Gael A,I have set the PWM frequence down to 20kHz in order to ease the chip. This results in significantly larger ripples (due to the low motor inductance) and less frequent distortion in the phase currents, but larger distortion. I managed t...

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User Activity

EEPROM Emulated Timing (x-cube-eeprom)

Noisy Torque/Phase Currents

Unstable SPI Slave

SPI MISO shifted

Motor Power Calculation (Watt)

Re: Noisy Torque/Phase Currents

Re: Noisy Torque/Phase Currents

Re: Noisy Torque/Phase Currents

Re: Noisy Torque/Phase Currents

Re: Noisy Torque/Phase Currents