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LDmicro Forum - pwm |
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pwm (by ikram)
How much khz pwm we can get by 20mhz crystal with 0.20 clock time from pic16f877
(no subject) (by MGP)
Software PWM :
max. 50Hz at 100 steps -> 100x 0.0002 = 20mS or 50Hz or 100hz at 50steps --> 50 x 0.0002 = 10mS or 100Hz or 200Hz at 25 steps. ---> 25 x 0.0002 = 5mS or 200Hz On the PWM pin XX kHz.
(no subject) (by ikram)
Yes but tell me my crystal 20mhz cycle time 0.2ms
on the pwm pin how max xx khz I will. I means how much maximum .
(no subject) (by MGP)
The cycle time has no effect on the max PWM frequency and with a 20Mhz crystal you can insert 20000kHz in LDmicro without a error.
(no subject) (by ikram)
Thanks a lot
(no subject) (by MGP)
Typo: Must be 2000kHz (2Mhz) not 20000kHz
MGP (by MEIYAZHAKAN)
SIR SEND ME 3PHASE INVERTER SEQUENCE
3PHASE (by MEIYAZHAKAN)
3 PHASE SWITCHING SEQUENCE HOW TO WRITE LD MICRO WITH IR2130 MOSFET
(no subject) (by Jonathan Westhues)
Can you sketch the waveform that you're trying to generate? The PWM hardware almost certainly can't generate it directly. You might be able to make it in software with a fast cycle time, or with some additional logic.
(no subject) (by aydin)
Hi,
Between 1 and 20 kHz, variable, I would. (Potentiometer or top-bottom button I use) 16F876 PWM processor. A-Time-cycle? B-crystal frequency? What is needed to be? Potentiometer and top-bottom button, you can give an example with FREQUENCY made me change? I will be very grateful Best Regards
about frequency inverter 3 ph (by MFQ)
Dear
Frequency inverter need 6 PWM output Controller for three phase induction motor if you need ups squire wave you can generate ( not PWM control ) thnaks
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