4LikesCapacitors on speedos
09-22-2020 | 01:24 AM
#17
Tech Lord
Joined: Aug 2007
Posts: 14,052
From: Holland
12-15-2020 | 10:47 AM
#18
I did a small test (not yet on a car) and made a capacitor bank from ceramic capacitors. The bank contains 9x 100uF-16v ceramic capacitors, these are not polarity sensitive. Why 9? Looks close to 2x 470uF normally used.
At work we have a capacity with ESR meter and the capacity is 870uF and the ESR is 27mOhm ! I looked in the specs of a normal 470uF capacitor which is used on the Euro spec Fleta ESC, the normal has an ESR of 220mOhm and a low ESR has 170mOhm (not measured but based on some specs I found).
At work we have a capacity with ESR meter and the capacity is 870uF and the ESR is 27mOhm ! I looked in the specs of a normal 470uF capacitor which is used on the Euro spec Fleta ESC, the normal has an ESR of 220mOhm and a low ESR has 170mOhm (not measured but based on some specs I found).
12-15-2020 | 11:35 AM
#19
Tech Lord
Joined: Aug 2007
Posts: 14,052
From: Holland
12-15-2020 | 01:15 PM
#20
Tech Master
iTrader: (19)
Joined: Oct 2007
Posts: 1,913
From: South Dakota
Low ultra low ESR capacitors are typically used in low noise amplifiers to increase efficiency, audiophiles, and other shaman devices. Used in Switching power supplies output stage with relatively high frequencies in the kHz-MHz range. Low ESR capacitors are not really needed at the mains filtering.
Equivalent series resistance, due note I2R heating and may actually cause more DC ripple or feedback.
What kind of frequency is being seen here as ‘lossless‘ low esr capacitors are not a dime a dozen, putting a low esr Capacitor on a rectifier that is not running at high frequency would be pointless as most half, full, or doubling rectifiers run at mains frequency.
You should use a low ESR capacitor when the expected I^2 R heat loss (ripple current, squared, times the ESR), is too much heat for a standard esr component.
Equivalent series resistance, due note I2R heating and may actually cause more DC ripple or feedback.
What kind of frequency is being seen here as ‘lossless‘ low esr capacitors are not a dime a dozen, putting a low esr Capacitor on a rectifier that is not running at high frequency would be pointless as most half, full, or doubling rectifiers run at mains frequency.
You should use a low ESR capacitor when the expected I^2 R heat loss (ripple current, squared, times the ESR), is too much heat for a standard esr component.
Last edited by Juglenaut; 12-15-2020 at 01:25 PM.
12-15-2020 | 03:04 PM
#22
Low ultra low ESR capacitors are typically used in low noise amplifiers to increase efficiency, audiophiles, and other shaman devices. Used in Switching power supplies output stage with relatively high frequencies in the kHz-MHz range. Low ESR capacitors are not really needed at the mains filtering.
Equivalent series resistance, due note I2R heating and may actually cause more DC ripple or feedback.
What kind of frequency is being seen here as ‘lossless‘ low esr capacitors are not a dime a dozen, putting a low esr Capacitor on a rectifier that is not running at high frequency would be pointless as most half, full, or doubling rectifiers run at mains frequency.
You should use a low ESR capacitor when the expected I^2 R heat loss (ripple current, squared, times the ESR), is too much heat for a standard esr component.
Equivalent series resistance, due note I2R heating and may actually cause more DC ripple or feedback.
What kind of frequency is being seen here as ‘lossless‘ low esr capacitors are not a dime a dozen, putting a low esr Capacitor on a rectifier that is not running at high frequency would be pointless as most half, full, or doubling rectifiers run at mains frequency.
You should use a low ESR capacitor when the expected I^2 R heat loss (ripple current, squared, times the ESR), is too much heat for a standard esr component.
12-22-2020 | 10:49 AM
#24
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
