Overcurrent during start-up

[luke514]

Hi, I have a G474RE controller with an X-Nucleo-IHM08M1 and a BL23E48-02D-03RO LIN motor. I’ve set up MC Workbench and am using ST Motor Pilot V6.4.2; I’m powering it with a bench power supply at 48V, 1A max

When I press START on Motor Pilot, the "alignment" appears, I can hear an internal motor noise (like a gear), but the rotor doesn’t move and after few ms ‘overcurrent’ appears on the screen.

Here's my parameters:

1a) Can we work out together what’s causing this and how to fix it?

I've already read the possible solutions here: file:///C:/Program%20Files%20(x86)/STMicroelectronics/MC_SDK_6.4.2/Documentation/html/md_docs_2firmware__errors.html#over-current

1b) What is this error? ASPEP_RESP MCP_ERROR _UNKNOWN_REG? Is the rev-up only for sensorless?

2) I’d also like to ask why I can’t use Motor Profiler to estimate motor friction:

[GMA]

Hello @luke514,

Verify that the U, V, and W motor phases are correctly associated with the U, V, and W pins on the board connector. Verify that the A, B, and Z signals are correctly associated with the A+, B+, and Z+ input connector.

Use the main speed sensor as the STO-PLL and the auxiliary speed sensor as the quadrature encoder. Using MC Pilot, display the STOPLL_EL_ANGLE and ENCODER_EL_ANGLE signals, and verify that both signals are aligned.
If mirrored, switch EncA and EncB signals. 

Motor profiler is available with "Observer + PLL" for Speed Sensor Mode.

[luke514]

Hi, in my motor there are V, U and W, whereas in the schematic for the x-nucleo-ihm08m1 there are A, B and C.

Please confirm that:

OUTA --> U

OUTB --> V

OUTC --> W

The rotor still isn't turning; in fact, it sometimes gives a slight jolt

"If mirrored, switch EncA and EncB signals." I don’t quite understand what you mean; my endoer has A, B and Z and their respective inverted signals (it operates at 5V) … I’ve only connected A, B, Z and 5V to the IHM inverter connector

I can’t use sensorless; in my application, I’ll have to use an encoder as the primary sensor; at most, I can use STO-PLL as a secondary sensor

[GMA]

Hello @luke514,

The use case is only for test purposes to verify that both signals are aligned, as shown in this post.

[luke514]

OK, I'll send you the screenshots shortly.

[GMA]

Hello @luke514,

The motor must spin by using the STO-PLL sensorless main sensor.

[luke514]

The rotor sometimes starts rotating for less than a second before stopping due to an overcurrent or start-up failure.

Is there a guide or something that shows how to select these parameters? I’ve been trying lots of different combinations for hours, but the problem seems to persist.

[luke514]

Anyway, for some reason I can no longer select the encoder...

@GMA