文件列表:

Phase84\V0-0-0\phase84.c (7967, 2001-07-10)
Phase84\V0-0-0\phase84.hex (472, 2001-07-10)
Phase84\V0-0-0 (0, 2001-07-25)
Phase84\V0-0-1\phase84.c (8879, 2001-07-10)
Phase84\V0-0-1\phase84.hex (574, 2001-07-10)
Phase84\V0-0-1 (0, 2001-07-25)
Phase84\V0-0-2\phase84.c (9983, 2001-07-16)
Phase84\V0-0-2\phase84.hex (533, 2001-07-16)
Phase84\V0-0-2 (0, 2001-07-25)
Phase84\phase84.c (9983, 2001-07-16)
Phase84\phase84.hex (533, 2001-07-16)
Phase84\Phase84_V0.jpg (96874, 2001-07-16)
Phase84\phase84.map (6667, 2001-07-16)
Phase84\Phase84_99SE.s01 (35880, 2001-07-16)
Phase84\phase84.sym (3397, 2001-07-16)

> -----Original Message----- > From: Mike Pearce [mailto:mimemike@paradise.net.nz] > Sent: Wednesday, 11 July 2001 4:28 p.m. > To: Shane > Subject: The Attached File > Importance: High > > The attached file is a single channel phase controller for a PIC16x84 @ 10Mhz. > It includes all versions of the code, plus schematic in protel 99 binary and > jpg formats. > > V0.0.0 - uses PORTB as a 7 bit input (0-128) > > V0.0.1 - uses 2 pins on PORTB to Increase/Decrease the level. > This is checked every 10ms - only done for a quict test. > > V0.0.2 is the version that matches the circuit diagram, and by using the > #defines can select input and output options. > > RB0/INT is used for the zero cross detection. > > RA0 is an active LOW output to an opto isolator to drive a TRIAC or IGBT > circuit. > > Phase control is a simple even time-slice method, with 255 levels of output. > > This has samples of how to use the interrupt routine for TMR0 and INT. > > Should be easy for people to modify the main loop to suit there own needs. > > Timing for 50Hz and 60Hz has been included - selectable by commenting out the > unwanted option. > > Also TRIAC or IGBT output is avalaible by commenting out the unwanted option. > > There is more info in the c file pertaining to TRIAC/IGBTS and EMI standards. > > P.S. - It worked on the first compile :) How often does that happen????? > > Mike :) --- from phase84.c --- * Simple Phase control using PIC16F84 - 100% C Program. * Using even time slicing method for both Triac and IGBT Drive methods. * Just change specific #define to choose which method is in use. * * Output pin for phase ctrl is RA0 * Zero Cross input is RB0 * Remainder of PORTB is used for level setting 0 to 255 in incs of 2 * * Output is Active LOW - i.e. it is desigend to pull an LEDs Cathode in an * opto-coupler low to turn the output ON. * * Output Driver Types: * Either TRIAC or IGBT control can be used with this software by selecting * the appropiate #define command. * * IGBT Driver: * An IGBT driver turns the output ON at the zero cross point and turns * the output OFF part way through the cycle - this has really low * EMI properties and is one of the few methods allowed for phase control * in European countrys (i.e complies with EN55015 EMI standard). * Other countries are following suit for example New Zealand and Austrailia * are almost there (See AS/NZS 4051 and CISPR15 EMI Standards ) * This method of dimming is audibly quiet, does not require extra filter * componets (If designed properly).It also has a better lamp life and can * control a wider range of lamps than the TRIAC method of dimming. * * TRIAC Driver: * A TRIAC driver turns the output OFF at the zero-cross and turns the * output ON part way through the cycle - this has high EMI output and needs * filter inducors etc. This has been the most popular method of phase * control since it was first demonstraited in London in 1962. To make * the TRIAC dimmer complient with modern EMI standards it requires * carefully designed filter circuits using large Toroid Inductors * and mains voltage AC rated capacitors. * This is still the simplest method to do, and quite cheap, but not * recommended for comercial designs any more. * It also has a tendancy to reduce Lamp life, and creates alot of audiable * noise in both the inductors and lamps. --- end ---

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