ST7FMC1M2T3 查看數據表（PDF） - STMicroelectronics

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ST7FMC1M2T3

8-bit MCU with nested interrupts, Flash, 10-bit ADC, brushless motor control, five timers, SPI, LINSCI™

STMicroelectronics 

ST7MC1xx/ST7MC2xx

MOTOR CONTROLLER (Cont’d)

Figure 74. Example of Command Sequence for 6-step Mode (typical 3-phase PM BLDC Motor

Control)

Step

Σ1 Σ2 Σ3 Σ4 Σ5 Σ6 Σ1 Σ2 Σ3

HV

Switch

0

T0

T2

T4

1

B

I1

I6

2

I4

3

I3

4

5

Node

HV

A HV/2

0

HV

B

HV/2

0

HV

HV/2

C0

A

I5

T1

T3

I2

C

T5

Note: Control & sampling PWM influence is not represented on these simplified chronograms.

Σ1

Σ2

Σ3

Σ4

Σ5

Σ6

HV

C2

C4

D2

HV/2

Superimposed voltage

(BEMF induced by rotor)

- approx. HV/2 (PWM on)

- approx. 0V (PWM off)

0V

Z2

Demagnetization

Commutation delay

Wait for BEMF = 0

D5 Z5

t

PWM off pulses

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