SCR Box and FET Box

SCR Box

SCR Box

SCR Box Internals

Note heat sink to the right, front panel to the left with display board, main board in the middle.

SCR Box Internals

Note front panel with display board to the left, encoder in the middle, and a multitude of switches.

SCR Box Back Panel

Note power inlet and switch, binding posts for external trigger with switch, and grill for ventilating the heat sink.

SCR Box Internals

Note heat sink to the left, front panel to the right.

SCR Box Internals

Close-up of main board

SCR Box Under Load

Operating from 25 VAC L-N three-phase source. Load is 4 mH and 50 ohms.

SCR Box Under Load

Close-up of front panel while running RL load

SCR Box Under Load

Scope Shot of SCR Box

Current (upper) and Voltage (lower) traces while operating as a 3-phase midpoint rectifier with RL load.

Scope Shot of SCR Box

Current (upper) and Voltage (lower) traces while operating as a 3-phase midpoint rectifier with resistive load.

Scope Shot Under Load

Current and Voltage waveforms with RL load.

Scope Shot Under Load

Current and Voltage waveforms with resistive load.