AN1913D Freescale Semiconductor / Motorola, AN1913D Datasheet - Page 47
AN1913D
Manufacturer Part Number
AN1913D
Description
3-phase BLDC Motor Control with Sensorless Back-EMF ADC Zero Crossing Detection using DSP 56F80x
Manufacturer
Freescale Semiconductor / Motorola
Datasheet
1.AN1913D.pdf
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7.3.7 State Diagram - Process Speed PI Controller
The Speed PI controller algorithm controllerPItype1 is described in the SDK documentation. The
controller execution (sampling) period is PER_SPEED_SAMPLE, period of Speed Control Timer
Interrupt.
Speed Control
PI (Reference Speed - Actual Motor Speed)
Request
Figure 7-12. State Diagram - Process Speed PI Controller
U_Desired =
BLDC control with BEMF Zero Crossing using ADC
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
Stopped/Alignment/Starting
Set Speed Control
Commutation
Request
Running
Commutation
(PER_SPEED_SAMPLE)
Timer Interrupt
Speed Control
Speed Control
Disabled
Software Design
Reset
47
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