Timeline for running AC synchronous motor with DC
Current License: CC BY-SA 3.0
11 events
| when toggle format | what | by | license | comment | |
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| Apr 5, 2015 at 22:22 | comment | added | vlad_tepesch | @SeanBoddy yes - a very rough aproximated sinus ;-). i added a little diagram. the frequency should be variable by a small amount, but the original frequency of the motor is 50Hz. The duty cycle i meant is the ratio of both phases on-time to the complete cycle (the above example has 75%). 100% does mean that one channel is the complete inverted of the other and both channels has a 50% dut cycle pwm | |
| Apr 5, 2015 at 22:14 | history | edited | vlad_tepesch | CC BY-SA 3.0 |
added pulse diagram
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| Apr 5, 2015 at 8:52 | answer | added | user39962 | timeline score: 2 | |
| Apr 5, 2015 at 8:50 | answer | added | Andy aka | timeline score: 2 | |
| Apr 5, 2015 at 8:47 | comment | added | user39962 | Wait, are you using a fixed frequency, fixed duty cycle signal to power this motor? | |
| Apr 5, 2015 at 8:43 | comment | added | vlad_tepesch | me neither thatswhy i am asking ;) My knowledge mainly is in the digital domain. | |
| Apr 5, 2015 at 8:23 | comment | added | Vladimir Cravero | low pass the square wave with an LC filter then. that's not really something I'm an expert of, sorry | |
| Apr 5, 2015 at 8:14 | comment | added | vlad_tepesch | and yes i also assume that it is the square wave. i hoped the inductance of the motor and a small ceramic cap would smooth it out enough. but it does not seem to work. | |
| Apr 5, 2015 at 8:10 | comment | added | vlad_tepesch | i tried the 100nF. with larger values i only have electrolytes that may not fit since the alternating polarities. | |
| Apr 5, 2015 at 8:08 | comment | added | Vladimir Cravero | I am guessing that the problem lies in the square wave you are feeding it now. Try to put a... 1uF cap in parallel with your motor. Try also 100nF that might be better. | |
| Apr 5, 2015 at 8:03 | history | asked | vlad_tepesch | CC BY-SA 3.0 |