Advanced Users: Modify a Drive Block :: Systems with Electric Drives (SimPowerSystems™)

Advanced Users: Modify a Drive Block

This section contains necessary information in order to modify the heart of a drive block. The modification of a drive can be useful if you have to change the electrical connections or the control modules. The following example uses the ac6_example demo in order to replace the three-phase electric source by a battery. The necessary steps to carry out this modification are:

Disable the Drive Link

Open the ac6_example.mdl demo by typing ac6_example in the MATLAB Command window. The drive is fed by a three-phase voltage source
Simulate the model (in accelerator mode) and observe the results.
Disable the link of the drive block from the electricdrivelib library (right-click on the block > Link Options > Disable Link).
Disable the Drive Link

Modify the Electrical Connections

Double-click on the PM Synchronous Motor Drive drive block (do not select Look under mask).
Delete the following blocks and connections: the three-phase electrical connections, the diode rectifier and the braking chopper.
Add two Connection Ports blocks from powerlib/Elements library, connect them to the positive and negative terminals of the Three-Phase Inverter block, as shown in the next figure:
Remove the AC Blocks
On the top level diagram, delete the three-phase source and replace it by a 300Vdc/1Ah/NiMH Battery block and a 100 µF capacitor block connected in parallel.
Remove the DC bus voltage blocks in the Demux block.
Remove DC Bus Measurement in the Demux Block
Add a Bus Selector block and select the Voltage (V) bus signal coming from the m output of the Battery block.
Observe the Battery Voltage