Ch-technology PS22A74 Manual de usuario descargar pdf (Pagina 7)

PS22A74

Intellimod™ Module

Dual-In-Line Intelligent Power Module

15 Amperes/1200 Volts

Powerex, Inc., 173 Pavilion Lane, Youngwood, Pennsylvania 15697 (724) 925-7272

6 Rev. 08/09

Protection Function Timing Diagrams

SC REFERENCE VOLTAGE

RC CIRCUIT TIME CONSTANT DELAY

a7a6

SET

RESET

N-SIDE

CONTROL INPUT

PROTECTION

CIRCUIT STATE

INTERNAL IGBT GATE

SENSE VOLTAGE OF R

OUTPUT CURRENT I

FAULT OUTPUT F

Short Circuit Protection (N-side Only with External Shunt Resistor and RC Filter)

a1: Normal operation – IGBT turns on and carries current.

a2: Short circuit current is detected (SC trigger).

a3: All N-side IGBT's gate are hard interrupted.

a4: All N-side IGBT's turn off.

a5: F

output wirh a fixed pulse width (determined by the external capacitance C

a6: Input "L" – IGBT off.

a7: Input "H" – IGBT on, but during the F

output perid the IGBT will not turn on.

a8: IGBT turns on when L→H signal is input after F

is reset.

SET

RESETRESET

CONTROL INPUT

PROTECTION

CIRCUIT STATE

CONTROL SUPPLY

VOLTAGE V

OUTPUT CURRENT I

FAULT OUTPUT F

Under-Voltage Protection (N-side , UV

)

b1: Control supply voltage V

rises – After V

level reaches under voltage reset level (UV

), the circuits

start to operate when next input is applied.

b2 : Normal operation – IGBT turns on and carries current.

b3: V

level dips to under voltage trip level (UV

b4: All N-side IGBT’s turn off in spite of control input condition.

b5: F

is low for a minimum period determined by the capacitance C

but continuously during UV period.

b6: V

level reaches UV

b7: Normal operation – IGBT turns on and carries current.

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Ch-technology PS22A74 Manual de usuario Pagina 7

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