Jon Freeman
Code for 'Smart Regulator' featured in 'Model Engineer', November 2020 on. Contains all work to August 2020 including all code described. Top level algorithm development is quite spares, leaving some work for you! Any questions - jon@jons-workshop.com
Dependencies: mbed BufferedSerial Servo2 PCT2075 I2CEeprom FastPWM
FieldControl Class Reference
Functions to control alternator field. More...
#include <field.h>
Detailed Description
Functions to control alternator field.
void set_pwm (double d) { Range 0.0 to 1.0 This PWM used to limit max duty ratio of alternator field energisation. With R25=33k and C4=100n controlling ramp input to CS pin of MCP1630 (not MCP1630V), ramp terminates fet 'on' pulse after a max of approx 980 us. With const int PWM_PERIOD_US = 2000 , duty ratio is thus limited to approx 50% max. This is about right when using 12V alternator on 24V systems A 1.225V reference (U7) is fed to the MCP1630 error amp which compares this to fed-back proportion of system voltage. This adjusts final PWM down to zero % as needed to maintain alternator output voltage.
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