17
Chapter Three: Motor Application Design
How will feedback be detected? How much intelligence the system needs depends on the
BLDC's complexity:
• What are the timer characteristics?
• What kind of safety functionalities can you insert to detect the shortcut mode,
overcurrent, or undervoltage?
• What are the signal characteristics—in particular, the maximum PWM given the
load? Will variable voltages change with the speed and position of the motor?
So, even though your answers will differ when designing BLDC motors compared with
their brushed DC motor counterparts, the design process and questions are similar.
"Superior positioning
motors are vital for
dynamic systems with
higher performances.
BDLCs offer this in a
more 'natural' manner
than other motors
due to their internal
construction allied with
a properly designed
control."
Pyter Ely da Silva
Hardware Engineer,
Whirlpool Corporation
