參數(shù)資料
型號: IRMDSS1
廠商: International Rectifier
英文描述: IR1110 Soft Start IC Reference Design Kit For AC Motor Drives, UPS, Welders, and other applications
中文描述: IR1110軟啟動IC參考設計套件交流電機驅動器,不間斷電源,焊工,和其他應用程序
文件頁數(shù): 6/23頁
文件大小: 121K
代理商: IRMDSS1
6
IRMDSS1
4(c)
Adjusting the dc loop gain.
successive SCR firing points, with loads that have abnormally high
ripple voltage. Such ripple instability - should it occur - can be
corrected by reducing the dc loop gain.
Remove the zero ohm link R58. Re-insert R58, and insert R54
with values calculated as follows.
The dc loop gain will be reduced by a factor of R54/(R54+R58).
R54 and R58 should be chosen so that their sum is 200-250k Ohms.
The voltage regulation loop can exhibit uneven timing between
4(d)
Deactivating the voltage regulation function.
If regulation of the bus voltage is not required, i.e. the rectifier
is always required to deliver maximum possible dc bus voltage in
normal operation, connect JP4/1 to JP4/3.
Note that the soft start function is always activated, whether or not the voltage
regulation function is used.
4(e)
Low line voltage.
removal of the SCR firing pulses. When the line voltage returns to
normal, the bus voltage is automatically ramped back to the set
value.
If the input line voltage falls below the specified minimum
operating value, as shown in Table 1, the rectifier is deactivated by
4(f)
Temporary loss of all three input line voltages.
When all three input phases are temporarily lost, the dc bus voltage
starts to decreases during the outage.
(a)
initial operating bus voltage, VBUS1, then when the input
voltage returns, the bus capacitor is recharged without phase-
control of the SCRs. This allows the bus voltage to be restored
as quickly as possible for relatively minor dips of bus voltage,
and minimizes the effect of the line outage on system
operation.
If the bus voltage does not dip below a set fraction, k, of the
IRMDSS1
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