About Quentin Ch

Quentin Ch · 2023-03-03

Hello,I've generated a functional FOC project, with speed encoder. I also have Hall sensors wired (only used for my 6-step mode).I'd like to implement a basic 6-step control mode in this project.The FOC code allows me to set (eg. during the encoder a...

Quentin Ch · 2022-11-21

Hello, I'm controlling a BLDC motor with MCSDK 6.0.0 and IHM08M1, with FOC with 1024 PPR encoder. I compute torque (Iq_ref) commands to achieve speed control, this works ok except in rare case described below:Sometimes the MCSDK seems "stalled": I se...

Quentin Ch · 2022-10-18

The MC Workbench tool generate a CubeMX 6.5.0 project, that in turns generate C code.Actual behaviorWhen I select in this CubeMX project Project Manager > Code Generator > Copy only the necessary files, the generated IAR 8.0 project does not compile ...

Quentin Ch · 2022-10-05

Hello,By analysing the encoder alignement procedure, it generates a magnetic field aligned with stator phase A (arbitrary name) by setting Iq = 0, Id = high_value.To do the same but with the adjacent phase B (for example), am I right saying I just ne...

Quentin Ch · 2022-09-29

Hello,I can successfully control my motor in torque mode and speed mode.However sometimes (randomly ?), at the first call to MC_StartMotor1(), after encoder aligment, the motor starts to spin in the wrong direction, faster and faster up to its max sp...

Quentin Ch · 2022-11-21

Just to confirm: the approach Iq = high_value * cos(angle), Id = * sin(angle) allowed me to align the magnetic field at whatever angle, included phase B at 120°.

Quentin Ch · 2022-11-21

I implemented such solution as a workaround and it really improved the success rate. (However it will still fil e.g. under heavy load where the pre-alignement can't move enough the shaft or under elastic load, it's not a 100% reliable solution)

Quentin Ch · 2022-10-05

@RBrec.1 Hey, I finnaly understood the loss of control at specifi points in my case, it may help yours:it occurs when the rotor's field is 180° from the A phase field along which the MCSK tries to align the rotor, leading to nearly no torque and so ...

Quentin Ch · 2022-10-05

Okay, after investigation:For the aligning the encoder, the MCSDK forces a stator magnetic field along the A phase, and then the rotor tends to align with this field.However in some rare cases, the rotor is so that the rotor's field is at 180° of the...

Quentin Ch · 2022-09-29

(At the beginning, I suspected a link with https://community.st.com/s/question/0D53W00001JANcuSAH/loss-of-control-whenever-the-motor-starts-at-some-specific-points)

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Doing 6-step using FOC algorithm

FOC command is sometimes stuck

[Bug report MCDSK 6.0.0] Missing files when generating code with "Copy only the necessary files" option

Generating field along stator phase B for encoder alignement

Motor sometimes starts in wrong direction, because of wrong sign of Iq measured

Re: Generating field along stator phase B for encoder alignement

Re: Motor sometimes starts in wrong direction, because of wrong sign of Iq measured

Re: Loss of control whenever the motor starts at some specific points

Re: Motor sometimes starts in wrong direction, because of wrong sign of Iq measured

Re: Motor sometimes starts in wrong direction, because of wrong sign of Iq measured