This article discusses the development of motor protection equipment design Mechanical jam is measured high current value is wrong. Caused by the lock motor or the congestion of the motor.This value is the same. But when the locking of the motor or the congestion of the motor. Value of the comparison of the waveform in each period are not equal, which flows in this period จะสูง wrong, Mechanical defenses. Jam.Motor protection algorithm simulation program, Matlab / Simulink Then, the program has written down in the board STM32F4DISCOVERY to detection and signal Trip to prevent damage of the motor.
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