open loop control in MCSDK 6.4.1, CW and CCW have huge difference speed

[VictorChiou]

[VERSION]: MCSDK 6.4.1

[TOOL]:

• 6-Step Firmware

• Control by MC Pilot

[DETAILS]:
In open loop mode, the same duty causes a big speed difference between CW and CCW.
It doesn’t make sense.

[EXPECTED BEHAVIOR]:

• In open loop control, CW and CCW should not have a big speed difference.
• I guess the ".PhaseShift" parameter does not consider CW and CCW.
  The ".PhaseShift" of CW and CCW should be complementary,
  and the sum should be 60° electrical angle.

[HOW TO REPRODUCE]:

1. Control the motor with 6-step algorithm, current mode.

2. Use Hall signal for commutation and speed calculation.

3. Control by MC Pilot.

4. Set CW or CCW direction.

5. Enable open loop mode and set open loop duty.

6. Start the motor.

7. Get the CW or CCW speed.