參數(shù)資料
型號(hào)： 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(dòng)IC參考設(shè)計(jì)套件交流電機(jī)驅(qū)動(dòng)器，不間斷電源，焊工，和其他應(yīng)用程序
文件頁(yè)數(shù)： 8/23頁(yè)
文件大?。?/td> 121K
代理商： IRMDSS1
8
operation, allowing the rectifier to operate as a one phase bridge
when one phase is missing.
Note that these remarks apply to loss of one phase when the IR1110 is set
for normal 3-phase operation. If the IR1110 is set for dedicated 1-phase operation
(See Table 1), the 1-phase shut down function is inactive.
The following modifications disable the one-phase shut-down
function at full bus voltage - but keep this function enabled when
the output voltage is below a set value during ramp-up.
(1) Cut traces and add link as illustrated in Fig 7.
(2) Remove R92, R7.
(3) Add D14, R6, R95, R96, D15, Q5, Q6. Connect 0.1
μ
F across base
and emitter of Q7. Add diode (MA 116CT) across the open
R85 pads, with cathode towards pin 41 of the IR 1110.
(4) Change R101 to 220k, R100 to 0 Ohm link.
(5) Change R53 to 470k, 5%, 1/16W. Change C19 to 0.1
μ
F, 6.3V,
10%. Remove R58, insert R57 (0 Ohm, link).
4(i)
DC bus short-circuit.
Design automatically limits the fault current when the dc bus is
short-circuited.
If a bus short-circuit exists when the line voltage is switched
on, the SCR firing angle will not advance to more than about 35
electrical degrees ahead of the line voltage crossover.
If a bus short-circuit occurs during operation, the SCR firing
angle is phased back in less than half a cycle, to within about 35
electrical degrees of the line voltage crossover.
Short circuit current is thus limited to a much lower level than
would be obtained with an uncontrolled rectifier bridge.
Note that this function is active when the IR 1110 Reference
Design is set up for 3-phase operation, but not for dedicated 1-phase
operation.
When operating from a 3-phase supply, the IR 1110 Reference
4(j)
Omission of on-board SCR Snubbers/use of external-power supply.
protection, if external ac line filters are fitted.
If the on-board snubbers are omitted, it will be necessary to
provide external isolated +-15V (20mA) power to the PCB. The
required power supply connections to the PCB are shown in Fig 8.
The on-board SCR snubbers may not be required for dv/dt
IRMDSS1
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