ST92141 datasheet(119/179 Pages) STMICROELECTRONICS

No de pièce	ST92141

Description	8/16-BIT MCU FOR 3-PHASE AC MOTOR CONTROL

PDF	179 Pages

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Fabricant	STMICROELECTRONICS [STMicroelectronics]

Site Internet	http://www.st.com

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ST92141 - 3-PHASE INDUCTION MOTOR CONTROLLER (IMC)

INDUCTION MOTOR CONTROLLER (Cont’d)

PWM signals generation in Classical mode

In this mode, each of the three PWM signals set to

‘0’ when the PWM Counter reaches, in up-count-

ing, the corresponding 11-bit Compare register

value and they are set to ‘1’ when the PWM Coun-

ter is cleared.

If the 11-bit Compare register value is greater than

the extended Compare 0 register (the 11th bit is

set to ‘0’), the corresponding PWM output signal is

held at ‘1’.

If the 11-bit Compare register value = 0, the corre-

sponding PWM output signal is held at ‘0’.

Figure 66 shows some Classical PWM waves in

an example where the Compare 0 register value =

Figure 66. Classical PWM Waveforms (Compare 0 Register = 8)

01234567801

‘1’

‘0’

1 Compare Register value = 4

2 Compare Register value = 8

3 Compare Register value > 8

4 Compare Register value = 0

ST92141 Fiches technique(PDF) 119 Page - STMicroelectronics