This information is part of the Modelica Standard Library maintained by the Modelica Association.

This example of an H bridge with DC drive demonstrates the operation of the DC machine in four quadrants. The DC output voltage is equal to 2 * (dutyCycle - 0.5) times the input voltage.

start time (s)	machine speed	machine torque	mode
0	zero	zero
3	positive	zero
6	positive	positive	motor
9.5	positive	negative	generator
12.5	negative	negative	motor
15.5	negative	positive	generator
19	negative	zero
22	zero	zero

Plot machine current dcpm.ia, averaged current meanCurrent.y, machine speed dcpm.wMechanical, averaged machine speed dcpm.va and torque dcpm.tauElectrical.

f	Value: 1000 Type: Frequency (Hz) Description: Switching frequency
Ld	Value: 3 * dcpmData.La Type: Inductance (H) Description: Smoothing inductance
tauNominal	Value: dcpmData.ViNominal * dcpmData.IaNominal / dcpmData.wNominal Type: Torque (N·m) Description: Nominal torque
dMin	Value: 0.2 Type: Real Description: Minimum duty cycle
dMax	Value: 1 - dMin Type: Real Description: Maximum duty cycle
dcpmData	Value: Type: DcPermanentMagnetData Description: Data record of PM excited DC machine