AN1905 ST Microelectronics, Inc., AN1905 Datasheet - Page 19

• Manufacturer Part Number: AN1905
• Description: St7mc Three-phase BLDC Motor Control Software Library
• Manufacturer: ST Microelectronics, Inc.

Figure 7. Linear curve for coefficient computation
3.4 NOTE ON DEBUGGING TOOLS
3.4.1 Low voltage applications (below 30V)
For these voltage levels, the real-time emulator can be connected to the application, taking
care to connect the protective boards provided with the MDT50 emulator (refer to the emulator
datasheet for details). It offers trace and advanced breakpoint capabilities, as well as the pos-
sibility to automatically disable the PWM outputs on a breakpoint to avoid any DC current in-
jection in the motor (see
This emulator is delivered with a set of three boards to protect some of the motor control ded-
icated I/Os from voltages greater than 5V. It is highly recommended to have them connected
during the development. A neutral board is also provided in case the protection networks im-
pedance (1K series resistor plus 5V3 zener diode) is an issue for the application. Refer to the
ST7MDT50-EMU3 Probe user guide Section 3.1 for details.
An In-Circuit Debugging tool can also be directly connected, as long as an ICC connector is
available on the application.
Important Note:
Rising_Fmin, Falling_Fmin
Ki_Fmin, Kp_Fmin
Ki_F_2, Kp_F_2
Rising_Fmax, Falling_Fmax
Ki_Fmax, Kp_Fmax
Rising_F_1, Falling_F_1
Ki_F_1, Kp_F_1
Rising_F_2, Falling_F_2
Rising/Falling Bemf
Ki, Kp
F_min
ST7MC THREE-PHASE BLDC MOTOR CONTROL SOFTWARE LIBRARY
When using ICD, during a breakpoint, the clock circuitry is not disabled:
a permanent DC current may flow in the motor as the PWM outputs are
enabled. It is thus recommended to use a power supply with fast
current limitation capabilities or if possible to disable the PWM outputs
(by inserting MTC_DisableMCOutputs function) before the breakpoint.
Figure
F_1
8).
F_2
F_max
Target rotor
frequency
electrical
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