The PWM generator block of ST7MC motor control peripheral for SVPWM

AN2154

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Figure 3.

The 12-bit PWM block generator of ST7MC motor control peripheral

Figure 4.

Center-aligned PWM waveform: compare 0 register = 8, compare register

value = 4

Figure 5.

Edge-aligned PWM waveform: compare 0 register = 8, compare register

value = 4

2.1

Symmetrical space vector modulation

As discussed in Chapter 2 , the goal of SVPWM is to generate three appropriate PWM

signals in order to create, on the phases of the motor, three vectors V shifted (by 120°

between each other) and continuously rotating inside the space vector hexagon on the

complex plane. Moreover, it has been also discussed that, to create vectors V inside one of

the six sectors, the reference vectors which bound that sector have to be "time weighted"

using Equation 10 - 12.

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Product(s)

- Obsol