Motorola M68HC08 Reference Manual page 140

User Guide
NOTE:
Designer Reference Manual
140
Freescale Semiconductor, Inc.
#define CURR_PIREG_I_GAINSCALELEFT 0
Range: <0,8>
/* MUST_CHANGE_5_EXPER: */
#define CURR_PIREG_I_GAIN
Range: <0,255>
where the current regulator integral gain is:
KP = CUR_PIREG_I_GAIN*2
These constants can be calculated according to regulators theory. The
current sampling (regulator execution) period is PER_CS_T1_US = 128
s, at the default software setting. Normally it does not need to be
changed (if change is required see
Sampling Period Setting). Another recommended solution is an
experimental setting.
CURR_PIREG_P_GAINSCALELEFT, CURR_PIREG_P_GAIN,
CURR_PIREG_I_GAINSCALELEFT, CURR_PIREG_I_GAIN can be
evaluated with PC master software tuning file tuning_bldc.pmp.
We suggest using PC master software with tuning file tuning_bldc.pmp
for regulator parameters evaluation. You can use this procedure:
1. Set const_cust_x.h:
CURR_PIREG_P_GAINSCALELEFT 0
CURR_PIREG_P_GAIN 0
CURR_PIREG_I_GAINSCALELEFT 0
CURR_PIREG_I_GAIN 0
2. Temporarily change the software: in code_start.c file, label
TUNING_1 enable goto Align (it will cause infinite time for
alignment state, where the current is tuned)
3. Build and run the code (see
from Evaluation
4. Start the PC master software tuning project
5. Select Current Parameters Tuning subproject (see
Parameters Tuning with PC Master Software Project
order to be able to modify the current regulator
6. You can see the actual current (and required alignment current)
User Guide
For More Information On This Product,
Go to: www.freescale.com
64
CURR_PIREG_I_GAINSCALELEFT
PWM Frequency and Current
Software Execution, Build,
Board)
(EQ 6-5.)
Execute
Software
File) in
DRM028 — Rev 0
MOTOROLA