UM0432 datasheet(31/53 Pages) STMICROELECTRONICS

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UM0432

Motor control operations

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7.4.7

"3-phase PMAC motor (sinewave)" advanced settings

When you click on the Advanced Settings button (see Figure 16), the Advanced Settings

dialog box opens (see Figure 17). This is where the advanced "3-phase PMAC motor

(sinewave)" motor type parameters are set.

Figure 17.

"3-phase PMAC motor (sinewave)" advanced parameters window

Table 11.

"3-phase PMAC motor (sinewave)" advanced parameters

Parameters name

Description

Switches PWM

frequency

Pulse width modulation (PWM) frequency in kHz.

Dead times value

Selects from the available preset the dead time duration values in microseconds (µs).

Ph/F curve

The software uses this curve to set the value of the phase shift based on the actual value of the

rotor frequency when the "set phase shift according to Ph/F curve" option is set in the main

window. The curve is a linear interpolation between two knee-points.

First knee-point

Phase shift

Sets the phase shift value of the first knee-point of the curve.

Frequency

Sets the frequency value of the first knee-point of the curve.

Second knee-point

Phase shift

Sets the phase shift value of the second knee-point of the curve.

Frequency

Sets the frequency value of the second knee-point of the curve.

Stop condition

Free wheeling

After stopping, the motor continues to spin freely.

Active braking

Motor is braked, generating a stator field 90° in advance with respect to the rotor field.

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