AN1948_D Freescale Semiconductor / Motorola, AN1948_D Datasheet - Page 8

• Manufacturer Part Number: AN1948_D
• Description: Real Time Development of MC Applications using the PC Master Software Visualization Tool
• Manufacturer: Freescale Semiconductor / Motorola

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Development of Motor Control Applications Using PC Master Software
4.2 Visualization of Calculated Variables
Figure 4-2. Visualization of Phase Currents and DC-Bus Voltage Using the Recorder
During development of control algorithms it is necessary to visualize calculated variables, their
courses, variations and mutual influences. It is especially valuable for development of algorithms,
based on any kind of estimators. PC master software enables visualization of all variables using the
Scope, Recorder or Variable windows.
Visualization of the calculated variables can be shown on the sensorless control algorithm of SR
motors. The position estimation of the motor is based on the estimation of the phase flux linkage. The
correctness of the flux linkage estimation is a key factor in the sensorless drive performance. During
development of the algorithm, the encoder position sensor is used as a position reference for the
evaluation of the sensorless determination of the motor position. The Recorder permits visualization of
the calculated flux linkage together with the phase currents and with the reference position from the
encoder (see
theoretical analysis. The individual parameters of the control algorithm can be easily modified to reach
the desired behavior of the sensorless technique.
Figure
Real Time Development using the PC Master Software
4-3). The shape of the calculated flux linkage can be compared with the
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