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AN2281 Datasheet(PDF) 31 Page - STMicroelectronics

Part # AN2281
Description  Low cost self-synchronizing PMAC motor drive using ST7FLITE35
PDF  38 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN2281 Datasheet(HTML) 31 Page - STMicroelectronics

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AN2281
List of software functions and interrupt service routines
31/38
Appendix A
List of software functions and interrupt
service routines
My_functions.c Module
Set_Spinning_Direction
Soft_Start
DoRotorAlignment
DoMotorControl
Description:
This function allows you to set the rotation direction of the motor before the
start-up procedure
Input:
Value CW or CCW ("direction" type has been defined in My_functions.h
header file)
Returns:
None
Caution:
This function must be called when the motor is stopped, before the start-up
procedure. Calling the function while the motor is running could cause
damage to the motor.
Description:
This function carries out a soft motor start up by performing a linear
increase of the three-phase sinusoidal voltage.
Input:
None
Returns:
None
See also::
Start-up procedure description in Section 5.2
Note:
start_up_on_going variable is equal to 1 if soft start is on-going, 0 if it is
over.
Description:
This function performs the rotor alignment by exciting the motor phase W
(see Figure 9) and keeping the other two at ground
Input:
None
Returns:
None
Caution:
The function is compiled only if rotor alignment phase is enabled
Duration:
~ ALIGNMENT_DURATION.
See also::
Start-up procedure description in Section 5.2
Description:
This function performs a closed loop speed control. It utilizes a PI
(proportional and integral) regulation algorithm to determine the most
appropriate voltage value to get the expected rotor speed.



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