Motor Voltage Waveform Simulation

Use the App below to simulate the voltage response at the motor terminals for a drive, cable, and motor system based on drive, cable, and motor parameters. Adding filters can reduce the dv/dt and peak voltages.

System model

See the Home page and Simulation Details page for more information.

Simulation Inputs

Enter the required information below to initialize the simulation. Hover over input boxes for more information.

Motor Parameters:
Lm: [H]
Re: [Ω]

Cable Parameters:
Lc: [H/m]
Cc: [F/m]

Cable Length: 5 [m]

Reactor Parameters:
Lf1: [H]
Rf1: [Ω]
Suggested Damping: ~? [Ω]

LC dv/dt Filter Parameters:
Lf2: [H]
Cf2: [F]
Rf2: [Ω]
Suggested Damping: ~? [Ω]

Drive Waveform Parameters:
trise: [sec]
VDC: [V]

Plotting Parameters:
Vmax: [sec]
tmax: [sec]

Preload Example Values:
SiC Drive with Inverter-Rated Motor
Si Drive with Gen-Purpose Motor and Long Cable


Simulated Responses at Motor Terminals to Drive Voltage Rising Edge

Calculated Peak Voltage
Unfiltered: 0 [V]
L Filter 1: 0 [V]
LC Filter 2: 0 [V]
Typical Design Values:
≤ 1000 Volts (for 460 V motors)
Calculated 0 to VDC Rise Time
Unfiltered: 0 [sec]
L Filter 1: 0 [sec]
LC Filter 2: 0 [sec]
Typical Design Values:
≥ 100 ns (for inverter-rated motors)
≥ 2 μs (for general purpose motors)

Simulation by Andy Schroedermeier © 2018
Version 0.3 last updated 25 July 2018.
Plots created using Flot. Numerical integration by Numeric Javascript.

Questions? Comments? Contact Andy Schroedermeier here.