sequential (81) motor

https://wodewangzhishime.blogspot.com/2021/10/httpswodewangzhishime_18.html

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Ref: https://wodewangzhishime.blogspot.com/2022/02/httpswodewangzhishime_11.html .

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1) if the circuit is inductor-orientated, the voltage lead the current.

2) if the circuit is capacitor-orientated, the current lead the voltage.

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3) If we put a capacitor or resistor on the circuit of the "stator", the magnetic flux of the stator will drop, as a result, the the current lead the voltage, and then, the rotor rotate faster. . .We call that field weakening control or flux control.

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Me: Pratically, we use resistors instead of capacitors to control flux. . Have a look.

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T1,2,3,4 represents transistors 1, 2, 3, 4,

R1,2,3,4 represents resistors 1,2,3,4,

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if (T1,2,3,4 = cut-off) // Note: We can't manually control the on/off of those transistors;

{

Level of resistance = 4; //Note: the transistors are controlled by integrated circuit/

Speed of Rotor = 4;

}

else  if (T2,3,4 = cut-off)

{

Level of resistance = 3; // Note: you can use capacitors instead. . . However, pratically, we use resistors instead.

Speed of Rotor = 3;

}

else if (T3,4 = cut-off) // Note: If Transistors 1,2 are saturated, Resistors 1,2 can't play the role of resistors.

{

Level of resistance = 2;

Speed of Rotor = 2; // Note: The more resistors lose its resistance, the more the current of the stator lead the voltage of the stator. . .As a result, more and more flux is controlled and then the speed of the rotor become higher.

}