The utility model relates to a
simulation test device for various major
loop control logics of a high-
voltage frequency converter. The
simulation test device comprises a
control signal receiving circuit, a state feedback circuit, a
contactor control circuit and a
power frequency branch control circuit, the device is characterized in that the
control signal receiving circuit is composed of a
relay K1, one end of a coil of the
relay K1 is connected with the positive
electrode of a 24V direct-current power supply, and the other end forms a control input end; the state feedback circuit is used for simulating state signals of an isolation disconnecting link and a
contactor in a main loop topology circuit of the high-
voltage frequency converter; the
relay control circuit is composed of a relay K2, a relay KM3, a relay KM4 and a relay KM5. The
simulation test device for various major
loop control logics of the high-
voltage frequency converter can simulate various forms of major loop topology circuits of the high-voltage frequency converter and then verify an
upgrade program, thereby facilitating
verification of the
upgrade program, saving manpower and
material resources, and being used for training and teaching new employees.