STM32 MCUs Motor control

Hi, I have a project, based on a STM32L071CB MCU, where I use two L6470 stepper motor drivers attached together in a daisy chain configuration: a pin of MCU configured as general purpose output is connected to both the Chip Select of the two L6470 devices; the SCLK output of SPI1 is connected to both the CK inputs; the SPI1's MOSI from MCU goes into SDI of the first L6470 device and the SDO of the second L6470 chip is attached to the SPI1's MISO of MCU. I'm here to ask help on how to pack data to proper form a valid SPI frame, that send on the SPI bus, allow me to put L6470's commands. At the moment I cannot receive any kind of data from one or more L6470 devices when I issue a GETSTATUS or a GETPARAM command to them. Here I depict the SPI frame I sent on the SPI daisy chain bus when I want to ask to the second L6470 device (the one whose SDO pin is connected to the MISO) its STATUS register value, by means of a GETSTATUS command: CS\ ---\ /--- \__________________________________

My motor control application uses the STM32G431. The code has a serial command that reports the Vbus voltage. To get the Vbus voltage I run the following in a low priority timer callback at triggers once per second. float V_d = (float)PQD_MotorPowMeasM1.pVBS->AvBusVoltage_d; volts = V_d * ((ADC_REFERENCE_VOLTAGE / BUS_PARTITIONING_FACTOR))/65535.0;The motor supply is 5Vdc and with the motor On or Off a scope trace and DVM show the 5Vdc is not changing more than 2-3mV. The divider is 30k to +5Vdc and 10k to Gnd and the tap has a 4700pf cap to ground. The tap goes to PA3 (ADC1_in5)When the motor is not running I typically report 4.8vdc but running I may see 4.5vdc on some boards and 5.3vdc on others. The supply rail is not changing but the reported ADC reading is changing.I am using the following ADC for motor current, Vbus and Temperature: U adc1_in3 V adc1_in2, adc2_in2 W adc2_in1 Temp adc1_in4 Vbus adc1_in5My pwm frequency is 23kHz and the Vbus and Temp ADC's are set per the attach

Hi,I have EVSPIN32F0601S3 Development Board and NUCLEO-F302R8 Board:and have to interface below AC Servo Motor for Speed, Torque and position control application.Part Number: MHMD082G1Vhttps://www3.panasonic.biz/ac/ae/search_num/index.jsp?c=detail&part_no=MHMD082G1VWill it possible to use1) EVSPIN32F0601S3 Board ?2) NUCLEO-F302R8 with Drive Board (Suggest Part Number )?For above interfacing . Where I can find demo code ?Can I use MCSDK or Motor Profiler Tool for AC Servo Motor ? Thanks in advance..--Karan

Hi,I used Nucleo-F446RE and X-Nucleo-IHM08M1 for FOC control of PMSM motor.Motor Profiler to determine parameters.Then WB, CubeMX and CubeIDE able to generate code. Start Motor using Monitor screen, the motor fluctuates at +80rpm and -80rpm.Need help.

After profiling my motor with motor profiler, I start a new project with workbench and generate code for Cube IDE. compile it and flash it with STlink utility at adress 0x08000000.then back to workbench and try to start motor but I have an immediate overcurrent fault. I decrease Iq and Id pid Gains down to 0 and the overcurrent fault disappear. that does not makes the motor spin of course but with Id/Iq gains set to 0 I still measure high current by monitoring with workbench. My config is as follow: cube IDE v1.6.1 / workbench v5.4.5 / cube MX v6.2.1 / firwmare package version 1.4.0 / ESC1 batch03I did the exact same process than shown in the tutorial : https://www.youtube.com/watch?v=MF7-tHG_qiQ except the guy is running with true studio but obvisously either I am missing something or there is something wrong with the code generation. The board seems fine because motor profiler manage to spin the motor well. Also if I flash the firmware from motor profiler and then back to workbench,

All my inputs are assigned to the PWM , but by default only on rotates and if i switch one ore do another PWM it doesn't work . Don't understand why's that.Looked at both schematic and ii don't know why that's happening.

Hi,I have a control board with the MCU F302R8, and a power board with the ST L6230. For my tests, I want to shift the motor phase voltages, so that the phase shift offset is not 120 degrees, and I want to be able to change the offset manually. My question is: is this actually possible with the ST L6230? Or shall I look for another motor driver?

Unfortunately, I do not have much info as to what causes this. I am using the FOC library with a 3-phase BLDC and encoder as speed feedback. Sometimes when I send a ramp command, the motor flies to ~5000 RPM regardless of the target speed I set. It is very infrequent. It can be fixed by cycling power it seems. Anyone run into similar issue?

Hi,I'm using ACIM GUI. I want to generate code for ACIM motor but I'm taking this fault : The file C:/Program Files (x86)/STMicroelectronics/MC_SDK_5.Y.2/Utilities/PC_Software/..stmcx does not exist.Can you help me this problem?Have a good day.

I have a 2 pole pair BLDC 24V 2A motor capable of 49kRPM. I used the 5.Y.2 Profiler to create a motor profile and the 5.Y.1 to import the motor profile into a SPIN32G4EVAL project. Using the default 5mohm sense resistors, I am able to spin the motor up to 38kRPM without issue in Pilot. When I change the board to 50mohm sense resistors and change the profile to match, I can start the motor in Pilot but when I command speeds above 11.3kRPM the mechanical speed max's out at 11.3kRPM and it doesn't error. I'm seeing less than 400mA of draw on the 24V so it is hard to imagine the current is out of range. Question 1: What could be causing this RPM limit with a larger sense resistor?I'm not sure if it is related, but I also noticed the default resistor values in the gain for the sense resistors don't match the SPIN32G4EVAL board. I've attached a screenshot of the default but the actual values are 1.5k/11k.

Hello ST Community,in my application I use an STSPIN32F0B in FOC.The design is similar to the STEVAL-SPIN3202 demo board. I used the STSPIN32F0A in Motor Control Workbench to generate the code (STSPIN32F0B is not in the Motor Control Workbench). I use it to control a BLDC motor sensorless. PWM frequency is 20kHz and the deadtime 900ns. The control of the motor works fine.the only thing that strikes me as strange is the oscillogram of the 3 phases. Here there are sporadic short intermediate pulses between the 20KHz pulses (see oscillogram)Do you have any idea what is happening here?Thank you very muchBest regardsFranz

hi st community,I am using NUCLEO-G431RB control board and STEVAL-IPM20B power board, generate the code using st-workbench. the board is connected with 1kw PMSM motor of 3000rpm.Motor run fine up to 1200 rpm but rpm not increase after that, at that point the motor output power showing 200 W on monitor dial.st work bench monitor screen has power dial of maximum 200W, is that limit or what? the power board capacity 2000W.how can I achieve the full RPM with increase in output power. thanks,

I use the 'cut off' STLINK board from a Nucleo 446 module to program other STM boards using the STMcube programer software. This works fine for all my STM processors. However, I cannot connect to the STEVAL-PTOOLV1 motor control eval board - cannot find the target. I have verified that the STLINK board works ( it programs a separate Nucleo446 fine) - I have checked the wiring to make sure SWclk, SWdio, NRST, VDD, gnd are all wired one to one between STLINK and PTOOLv1 board, etc. I have powered the PTOOLv1 board and enabled the 'trigger' to put power on the processor. Cube programmer sees the STLINK module, set to SWD port, latest firmware loaded to STLINK, etc - never connects to PTOOLV1 processor...Any ideas?

I have connected 3 motor shields in a daisy chain however, for some reason i can figure out, only the first motor is running. I tired debugging the code and realised that the movement function for the other two motors is never executed but im not sure how to fix this.

Are there software project examples of how to use the PTOOL1V1 without the hall sensors? Also, what programming device should be used for the SWD? Thank you!

Hello, I am using a B-G431B-ESC1 board and want to set up my motor with speed control via back emf in MotorControl Workbench 5.4.7 or 5.Y.2 (I checked both there and there). On the board, these are pins PA4, PC4, PB11 and PB5, but I don't see this initialized in the SDK. In the speed sensing section, I have sensor-less (Observer + PLL) installed.

What is the type of right motor in picture ? both of them are brushless yes ? but what kind of brushless exactly ? pmsm ,blac , ... ?Is the right motor Stepper ? what is that notch at top of it's stator winding for ?  

I'm considering STM32G431 for a motor control project with 4 stepper motors driven by step and direction.Can all 4 steppers be controlled by using TIM1's four PWM Generation channels 1 thru 4 and be made to move by different amounts of pulses simultaneousy?Or do I need to use a separate TIMx for each motor, e.g., TIM1, TIM8, TIM2, TIM3?

I have "Nucleo F303-RE" and "STEVAL-IPM15B" .( and some custom PCB which are not important in this question)So I have connected 2 board together and test two BLDC motor . And run first bldc and everything works good and get me detail about motor ( Rs , LS , Ke and ...) But when I connect next motor to get detail It gives me error which shows in below picture :*** Also speed feedback little circle will red sometimes . ***so after this I have changed RPM to more high and more low and some random value . But none of them work .So I think our second motor is not bldc or is some especial type of bldc I will add the picture of inside of motor maybe help to more answer : So as It shows it seems to be not synchronous motor but sure bldc . so why st motor profiler can't specify motor paramater ?

So we have "Over Current Protection" part in Motor Control Workbench . but it seems it needs an external circuit on board to sense current , and there is 2 question here :1- what circuit should I use and where should the output of that circuit be connected ( in "Over Current Protection" dialogue there is no place to choose a pin for over current detection .2- why we should use an external extra circuit for current sensing when we already have three shunt on our MOSFETs ? Can we add just a simple if where we measure Ia or Ib and check if this value has been passed just stop anything ? ( I've already did it and it seems to work -But I know it should be a trigger to TIM break input to work properly - So is there any easy way to do this protection by just comparing Ia and Ib ? )

I have a project, we have two sites working on it. One site using stm32cubeIDE, I use IAR.Currently we met a problem, when compiled by IAR, program runs all fine. But using stm32CubeIDE to compile and downlod to run, some functions of the program failedFor example, the stepper motor, in IAR it can run smoothly without problems. But in Stm32CubeIDE, stepper motor can not run smoothly, can see obvioously stuck when running.I can not find any clue about this, can anybody help to prompt to find a way to solv it.

How can the initially delivered hardware/software configurations for an "evaluation" product intended to market a suite of motor control product offerings be so poor?NONE of the current ST software directly supports the "Active" product STEVAL-STEP3202.All I am trying to do is spin a small 24 V 400-watt BLDC CNC "spindle" motor in open-loop, sensor-less, FOC-mode (plans were to add "hall feedback" later). The evaluation board suggests that with a simple hex binary load supplied in the available product software package, that the eval board should spin up a "generic" BLDC motor using the on-board RESET, SW1, and SW2 buttons for ON/OFF functionality and the on-board potentiometer for speed command.NONE of the pre-compiled "binary" examples for "UART" and "Potentiometer", which are directly referenced in the STEVAL-SPIN3202 documentation, actually exist in the delivered software folders as described in the product's documentation. So much for a quick and initial evaluation BEFORE one

Hello,I have big troubles driving a motor with the STEVAL-SPIN3201 using FOC-Algorithms.The motor is connected to the board and the code is generated using the MC workbench. The motor always starts turning but then suddenly stops. I think it is the moment, when the final value of the speed ramp is reached. The motor pilot then shows speed feedback or start-up failure. I already tried different parameter settings.Do you have an idea about the cause of this problem?It would be great if you could help me.Best regards,Florian

Hello,We are using Discover board 407G to drive a 48V-BLDC motor using a development board from Texas DRV8353. The motor has hall sensors for position/speed measurements.We are using Motor control workbench (MCSDK_v5.4.5-Full) to generate the code and to control the operation of the motor.We managed to get the motor to spin, however, the motor speed is uncontrolled. Using any speed setpoint will make the rotor to spin at the same speed.We have even tried the torque control and it is doing the same, motor is spinning at a single speed even if we send iqref=0.The speed shown in the Motor control trace shows 750rpm, we measured the speed using an external tachometer and it shows 2150rpm. please see the attached photo.Another Photo with the MCWB dashboard shows the settings for reference.We think that the code might have been broken at some point, we wonder if we can get some directions from you guys where exactly in the code may have been broken.

The motor I'm using does not have Hall Effect sensors or encoders. What I'm confused about is what could cause an over current error. I'd like to note that for the motor I'm using, I do not know the specific values of certain parameters, such as the number of pole pairs. What specific motor parameters would influence the likelihood of an over current error? Are there any start up parameters or drive settings that could influence it as well? I'd like to note that any settings that I have not attached here were untouched. The only motor parameters I had changed were the number of pole pairs, the nominal current, the resistance, and the B-emf constant, keeping in mind that these numbers are not necessarily accurate. I also changed the final current ramp value and current final ramp value in the start up parameters, and the PWM frequency and execution rate (since apparently the ratio between the two must be less than 14k). I'd like to know what values could be causing the over current erro