STM32 MCUs Motor control

Hello all,I am planning to purchase the EVLSERVO1 to control an industrial three-phase PMSM servo motor (rated 220V AC) for a hobby project. I will be running it at a lower voltage and accept the speed loss.The motor has a 17-bit absolute encoder using RS485 physical layer (protocol is currently unknown, likely proprietary, which I plan to reverse engineer).The EVLSERVO1 manual states: "The 120 Ohm termination resistors R84/R85 must be removed if termination is embedded at encoder side." My encoder has a built-in 100 Ohm termination resistor.While I understand the manual's instruction to prevent double termination, I would prefer not to modify a new board if possible.If I leave the resistors on the board, the parallel combination results in a ~54.5 Ohm load. Given that I plan to use a short cable (< 1 meter), is the EVLSERVO1's transceiver robust enough to drive this lower impedance without signal collapse? Or is the "must remove" warning critical because the board uses 3.3V logic a

Good day,I'm trying to get motor profiler running on an X-Nucleo-IHM17M1. The only compatible Nucleo board I have is a F303RE.To enable the motor profiler application, it requires the selection of 3 shunt current sensing. According to this link, it seems that both the IHM17M1 and F303RE support 3 shunt current sensing.Yet, when I try and configure the project, only single shunt is available. This is not the case for the other Nucleo boards.That said, I do receive the following warning when creating the project.Is there any solution for this, or should I use a different Nulceo board?

I am currently evaluating the X-NUCLEO-IHM16M1 motor control expansion board and would like to ask whether it is suitable for measuring the electrical parameters of the motor described below.The motor specifications (translated from the datasheet image) are as follows:Rated Voltage: DC 24 VRated Torque: 0.063 N·mRated Speed: 4,000 RPM ±10%Rated Current: < 1.7 ARated Output Power: 26 WNo-load Speed: 5,000 RPM ±10%No-load Current: < 0.3 ANumber of Poles / Phases: 8 poles / 3 phasesInsulation Class: Class BOperating Temperature: –10 °C to 40 °CAccording to the X-NUCLEO-IHM16M1 documentation, the maximum output current is specified as 1.5 A RMS. My question is:Is it possible to use the Motor Profiler tool in STM32 Motor Control Workbench to measure Rs, Ld/Lq, and Ke for this motor when using the X-NUCLEO-IHM16M1, considering its 1.5 A RMS current limitation?Any guidance or recommended measurement limitations would be greatly appreciated.Thank you very much for your support.Best

Motor Proiler 识别无刷空心杯电机的时候，卡在28%,套件用的是 Translation: When the Motor Profiler identifies a brushless coreless motor, it gets stuck at 28%. The kit uses...  

Dear ST Support Team,We are using the STM platform in our motor controller for the past one year. Our controller is developed for the automotive EV application.Currently, we are facing challenges at the software and code level related to motor control performance and optimization. We are stuck with code-level improvements and require technical support to analyze and fix the issues completely.We are looking for guidance and support on:Motor control software optimizationCode-level improvements and debuggingA complete and stable software solution suitable for automotive EV requirementsWe request your support from the STM motor control software team to help us resolve these issues.Please let us know the next steps to proceed further.Regards,Govind Dhongadi

Hello,I am new to STM and have been using TI MCUs in the past for motor control. I am considering using STM for a new project. I need to be able to control 5 BLDC motors with position control. They will each have their own closed loop control but will be somewhat be intertwined. I would like to start with an STM dev board and start with the control of one motor and move to more then continue to develop my own PCB. Any guidance on MCU selection/dev board selection would be greatly appreciated. And any suggestions on example projects to start with and easily modify for 5 motors. Also, I would like to know if it is possible to use absolute encoders for the motors rather than incremental for the position feedback. Thanks you!

HelloI am working on an academic research project involving a hybrid converter topology, where a controlled shoot-through state is intentionally required as part of the converter’s operating principle.I am currently using:STM32F446REIHM16M1 inverter driver boardMCSDK (Motor Control SDK)From my understanding, the IHM16M1 gate driver enforces hardware-level interlocking and dead-time, which prevents simultaneous conduction of the high-side and low-side devices in each inverter leg. Even when overlapping PWM signals are generated at the MCU level, the driver appears to mask them internally.My question is:Is there any supported or undocumented method to override or bypass the hardware interlocking / cross-conduction protection on the IHM16M1 board?I would like to clarify whether:This limitation is strictly hardware-bound, orAny alternative configuration (timer mode, driver pin usage, or hardware modification) exists that could allow controlled shoot-through for research purposes.Thank you

We noticed that the Overcurrent warning appears even when Overcurrent Protection is disabled. Could this be related to the missing feedback capacitors C38 and C42 on the OPAMPs for current sensing? Thank you for your support.Best regardsPelino

Hi Everybody!At this time I would like to use two EVAL6498L board for a DC brushed motor, (H-bridge setup).Selected mosfet is: IRFZ34NPBF.Selected PWM frequency: 20kHz width the STM32G431 MCU.The PWM signals are generated on the GPIOs, and I’ve verified that they reach the driver’s HIN and LIN pins. The low-side MOSFETs switch correctly, but the high-side MOSFETs won’t turn on. The bootstrap capacitors are charged to about 12 V (measured directly across the capacitor leads). The control table is the following:TIM1 chDriver InputForwardRevers1A LINForced HighForced Low2A HINForced LowPWM3B LINForced LowForced High4B HINPWMForced Lowhttps://www.st.com/resource/en/data_brief/eval6498l.pdfAdded R4 and R7 with 10 Ω resistors.What am I doing wrong? 

my mcsdk ver is 6.3.2，I want to driver my BLDC moto with steval_esc001v1,but the moto will stop and shake after 3-phases speed up. as the motor shake,and bus voltage(current) shakes.i want to know the Possible causes and how shuld to solve it.my motor is a2212， 2200kv ，7pole pairs，7.4V - 12.6V。appendix is my stwb6 filesthanks a lot。

 Hello ST Support Team,While reviewing the current sensing configuration of the EVSPIN32G4-DUAL board, I noticed a mismatch between the schematic and the description shown in Motor Control Workbench.In Motor Control Workbench, the current sensing section explains the presence of resistors related to the current sensing configuration.However, when I check the EVSPIN32G4-DUAL schematic, it is difficult to identify where these resistors are located, or which components correspond to the description shown in the tool.Could you please help clarify the following points?Which specific resistors or components in the EVSPIN32G4-DUAL schematic correspond to the current sensing resistors described in Motor Control Workbench?Is the current sensing implemented as single-shunt or another configuration, and where is this reflected in the schematic?Is there any additional documentation or reference design note that explains the current sensing implementation more clearly?I would appreciate your c

Dear All, I just stat to evaluate the MC SDK. My platform: MC SDK v6.3.0, NUCLEO-H563ZI, X-NUCLEO-IHM08M1. Have anyone know what's the difference between "Dead Time" and "SW Dead Time" as follow figure?Per it's default configuration, (SW dead-time is 850ns,  dead time is 1000ns), what is the exact value of dead-time to the power stage?Best Regards,  

Hi, I am using L476 controller with MCSDK 6.3.0  to control the BLDC motor, able to control the motor with Motor pilot application. However, i need to control the motor using serial communication IDEs like Realterm or Putty.I referred the document "Motor Control Protocol Suite" but didnt succeed in understanding and implementing the same. Please share some examples of the commands.I want to use command service only not the ASPEP. Looking forward for the support as soon as possible.

What is the P variant of STDRIVE102 and how does it vary from the STDRIVE102H?I can find datasheets for STDRIVE102H/STDRIVE102BH - with the BH variant having 3 Shunts(OpAmps) vs the standard H having 1 Shunt(OpAmp).The boards manager in ST Motor Control Workbench has the EVLDRIVE102P & EVLDRIVE102BP Evaluation Boards that point to the following (broken) links:https://www.st.com/en/product/EVLDRIVE102Phttps://www.st.com/resource/en/data_brief/EVLDRIVE102P.pdfI see Digikey and Mouser have stock of STDRIVE102P.

I am using Motor Pilot 6.4.1 Profiler and noticed that there is no "Start Hall Profiling" option available.Could you please confirm if this feature has been removed or if it is located elsewhere?Best regardsPelino 

I am currently working with the STM32 Motor Control SDK and would like to ask a question regarding the Placement Electrical Angle.Due to hardware limitations (single-shunt current sensing) and tool constraints, I am unable to use the Motor Profiler.In this situation, I would like to know:Is it possible to measure or determine the Placement Electrical Angle without using the Motor Profiler?If so, does ST recommend a manual or alternative procedure (for example, forced alignment using d-axis current, open-loop control, or hall-sensor-based methods)?Are there any application notes, user manuals, or example projects that describe this procedure in detail?For your reference, I am using a motor with Hall sensors and the STM32 Motor Control SDK.Thank you in advance for your support.Best regards,Pelino  

I am currently using the X‑NUCLEO‑IHM16M1 expansion board and noticed a discrepancy between the Motor Control Workbench and the official ST documentation regarding the rated current.In Motor Control Workbench, the Rated Current is shown as 2.1 A.On the official product page and data brief, it states Output current up to 1.5 A rmshttps://www.st.com/en/evaluation-tools/p-nucleo-ihm03.html Could you please clarify the following:What is the basis for the 2.1 A figure shown in Motor Control Workbench (e.g., RMS, peak, or internal limit)?Which current rating should be considered as the actual board limit for design purposes?Does the difference relate to the STSPIN830 driver’s internal specifications or to a configuration setting in the tool?Thank you very much for your support.Best regards,HyeonSeok​

Hi, the MotorControlWorkbench is generating the Feedforward control constants:M1_CONSTANT1_QM1_CONSTANT1_DM1_CONSTANT2_QDHow are the calculated, are there any documentation or formula for it?The Feedforward seems to be relevant for my project because I see current ripple aligned with my DC bus voltage ripple. But in practice there is no improvement, if I activate the FeedForward control. Also the bus voltage is measured with 1 ms and a filter with 6 values is applied. Are there any tips for my application if I have a bus voltage ripple period of 10 ms (3 Phase, 50 Hz)? Thanks for Help Sebastian 

Hi!I’m working on a motor controller design that utilizes an stm32f4 and a magnetic angular position sensor which communicates via spi.My design currently performs current sensing; I use channel4 of timer1 to trigger ADC reads near the center of my center-aligned UVW PWM period.This works great so far, but now I’m trying to think through how/when to schedule SPI reads of my angular sensor. I can straightforwardly perform an spi read when the ADC conversion completes, as part of my inner torque control loop. Is this reasonable to do? Is there a better way? It seems like the best time to touch off such a read is at the same time as when I trigger my ADCs. But I can’t quite figure out how I might do this.Thanks!

Hi all!I am using the IHM08M1 power board for a BLDC/PMSM motor application, and I have a doubt regarding the L6398 gate driver input logic.My question is:If I use PWM to control the high-side MOSFET and a GPIO to control the low-side MOSFET, is this approach correct when working with the L6398 gate driver?I am asking because I am currently using complementary PWM mode on my microcontroller. In complementary mode, the signals are inverted (PWM and its opposite), so HIN and LIN cannot receive the same logic level. Because of this, the L6398 truth table does not match, since the driver expects:HIN = HIGH, LIN = HIGH → High-side ONHIN = LOW, LIN = LOW → Low-side ONWith complementary PWM, this is impossible because the two signals are always opposite.So I am considering using:PWM → HIN (high-side)GPIO → LIN (low-side)I would like to know whether this method is valid, or if there is a better recommended way to drive the L6398 when only complementary PWM outputs are available.Please let me k

Hallo,i try to run an B-G473E-ZEST1S with STEVAL-LVLP01A. I generate code with the default setting from MCSDK 6.4.1., STM32CubeMX 6.16.1, STM32 FW V1.6.1 (Recommended)I changed nothing on the board hardware or MCSDK settings, i choose the 2 boards and generate code, but after startup I end always in an "<signal handler called at 0xffffffe9>".The error occours after MX_NVIC_Init(); without MX_NVIC_Init(); the code is running, so it has something to do with the interrupts, but I don't get it.Does anyone know what could be the cause of this error? Has anyone successfully used this board with the MCSDK 6.4.1?Thank you!

I am using Nucleo L476RG for controlling BLDC motor. In the FOC control, i need to change the motor ID in the code. What is the procedure to change motor ID??

Hi,I wonder how the motor control unit should behave if a speed ramp is programmed right after a torque ramp?Following code snippet shows this setup:// Set Torque/Iq limit MC_ProgramTorqueRampMotor1(iqLimit, 0); // Programm speed ramp MC_ProgramSpeedRampMotor1(speed, 500); // Start motor MC_StartMotor1();Do I understand correctly that this code should lead to the following behavior?the motor starts in speed modeif the load driven by the motor increases the speed will decreaseif the load increases further the motor will run with decreasing speed until it reaches the torque/iq limit set by  the MC_ProgramTorqueRampMotor1() functionthe motor will stop and deliver a constant torque - the torque programmed with MC_ProgramTorqueRampMotor1() Best regardsB0bbyR4y

Hi everyone,I’m currently working on a project using the ST B-G431B-ESC1 discovery kit to drive a 24V 250W BLDC hub motor. I'm using the SimpleFOC library for control and have added a small heatsink to the board to manage temperatures.The issue is that after running for a short period, I keep losing MOSFETs; they just randomly burn out. The motor wasn't even under heavy load when it happened, but I was trying to tune the PID, so there was some jerking.What could be causing this? Is it likely an overvoltage spike, an overcurrent issue, or something else entirely? How can I find the root cause, and is this board truly capable of driving a 250W–350W motor continuously, even with enough cooling?

Hello, I am driving a motor using the STEVAL-SPIN3201. The code is generated via the mc workbench.When I test the programm, the motor behaves like that:The motor starts up slowly according to the start up procedure I chose in the workbench.Then suddenly the motor moves with fullspeed for some seconds.After this the motor slowes down to the desired speed. Now I am able to change this speed via the motor pilot. When I change the Kp and Ki value, I can reduce the duration of the "full speed periode". However, it is still there. Can you explain what is happening and why the motor moves to full speed for a short time? Thanks a lot for your help!Florian