⚡ VSI PWM Propulsion Drive

Telegraph
150FULL AHD
75HALF
38SLOW
15D/SLOW
0STOP
15D/SLOW
38SLOW
75HALF
150FULL AST
STOP
0%
Demo Scenarios
Power Flow
● STOPPED
→ MOTORING
⚡ DYNAMIC BRAKING
💡 Click XFMR, RECTIFIER, DC LINK, INVERTER, MOTOR, or POD to zoom in
Premag Transformer
Status READY
DC Link Precharge 100%
Excitation Transformer
Status HEALTHY
Field Current 0 A
Braking Resistor
Chopper STANDBY
Resistor Temp 35°C
Cooling System
DI Tank
95%
→
DI Pump
RUN
→
Cond.
0.1 µS
→
Thyristors
38°C
→
HX Out
42°C
→
LT Cool
OK
Motor / Pod
0 RPM
0
kW
0
%Torque
0
Amps
0
Hz
DC Link
0
Volts DC
0
Amps DC
Alarms
DRIVE TRIP
DC OVERVOLT
DC UNDERVOLT
IGCT FAULT
COOL FLOW
COND HIGH
COND HI-HI
TEMP HIGH
EXCIT FAULT
PREMAG FAIL
BEARING TEMP
SEAL FAULT
HALF MOTOR
BRK DERATED

Self-Check Quiz

Eight questions covering what you've seen in the trainer so far. Submit each answer to see the rationale. The drive continues running on the Drive tab — flip between the two whenever you want to check something.

0 of 8 answered
0 correct

Quiz Complete

—
out of 8

Component Detail

⏸ Predict — the V–EMF gap
Steady at Half Ahead: the rotor's back-EMF nearly matches the applied voltage, so the stator current is small. Predict: ring the telegraph up to Full and watch the Stator Current Waveform below — what does the current do, and why?
The gap opens. Ringing up raises the commanded voltage faster than the rotor's back-EMF can follow, so V − E jumps. Current ≈ (V − E) / Z, so the stator current spikes. As the rotor accelerates, back-EMF climbs to meet the new voltage, the gap closes, and the current settles. Current is the motor's answer to the gap.