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A06B-0127-B577#7008  FANUC MOTOR A6/2000 I64 STRAIGHT AC

A06B-0127-B577#7008  FANUC MOTOR A6/2000 I64 STRAIGHT AC

Manufacturers ：FANUC
Model(s)  ：A06B-0127-B577#7008
Additional Information ：MOTOR A6/2000 I64 STRAIGHT AC
Estimated Shipping Size
Dimensions: 263 × 58 × 28mm
Weight:.4.3 kg
Country of Origin: United States of America

 

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Essential details：A06B-0127-B577#7008  FANUC MOTOR A6/2000 I64 STRAIGHT AC

1. Dc power current flows along the positive side of the power supply to the left brush above, brush and commutator friction, the current through the left commutator (also called commutator piece, this motor has two commutator pieces) flow into the coil, from the right side of the coil, through the right commutator piece and the right brush flow back to the negative side of the power supply, forming a closed loop
2. Because the coil is in the magnetic field of the main magnetic pole (N and S in the figure), the coil will be affected by the electromagnetic force, and the two sides of the coil will be affected by the electromagnetic force in the opposite direction due to the different direction of the current (the electric flow on the left side flows in, the right side flows out), so the two coil sides are affected by the same size and the opposite direction of the electromagnetic force, and the two electromagnetic forces just form the electromagnetic torque. The coil began to turn. The coil in the DC motor is embedded in the rotor slot, and the motor begins to rotate
3. The left and right commutator piece rotates with the rotating axis, and the brush is fixed, after rotating a circle, the right coil goes to the left, the left line goes to the right, but because of the existence of the commutator piece, the current direction in the left coil now flows in the same direction as the original current in the left coil, so the direction of the electromagnetic force is unchanged, and the right side is the same. Therefore, from the perspective of space, the direction of the electromagnetic force received by the coil side in the same position is always unchanged, which ensures the cyclic rotation of the motor.
4. But a coil, because the magnetic field is not the same when the coil is turned to different positions, the electromagnetic force subjected to the coil has been changing, so the coil is unstable, fast and slow. Therefore, more coils can be installed to ensure that the coil force is uniform and stable.

A06B-0127-B577#7008 

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A06B-0127-B577#7008  FANUC MOTOR A6/2000 I64 STRAIGHT AC

In an AC servo motor, in addition to the requirement that the motor cannot “rotate”, it is also required to change the size and phase of the voltage applied to the control winding to change the size and direction of the motor speed.
According to the theory of rotating magnetomotive force, a rotating magnetic field is produced by the interaction of the exciting winding and the control winding, and the direction of the rotating magnetic field is changed from the phase advanced winding to the phase delayed winding. Changing the phase of the control voltage in the control winding can change the lead-lag relationship of the two-phase winding, so as to change the rotation direction of the rotating magnetic field, and the speed direction of the AC servo motor will also change. Changing the size and phase of the control voltage can change the flux of the rotating magnetic field, thus changing the electromagnetic torque of the motor, and the speed of the AC servo motor will also change.
The speed control methods of AC motor include amplitude control, phase control and amplitude phase control.
(1) Amplitude control is to control the speed of the motor by changing the amplitude of the control voltage Uc, and the phase of Uc is always unchanged, so that the control current Ic and the excitation current If maintain the phase relationship of 90° electrical Angle. If Uc=0, the speed is 0 and the motor stops.
(2) Phase control is to control the speed of the motor by changing the phase of the control voltage Uc, so as to change the phase Angle between the control current Ic and the excitation current If, in this case, the size of the control voltage Uc remains unchanged. When the phase Angle between the two-phase current Ic and If is 0°, the speed is 0 and the motor stops.
(3) Amplitude and phase control means to control the speed of the motor by simultaneously changing the amplitude of the control voltage Uc and the phase Angle between Ic and If. The specific method is to string a phase-shifting capacitor C into the excitation winding loop, and then connect to the voltage regulator U1, then the voltage Uf on the excitation winding = U1-UEF. The same control voltage Uc as U1 is added to the control winding, then when the amplitude of the control voltage Uc is changed to control the motor speed, due to the coupling between the rotor winding and the excitation winding, the current If of the excitation winding will also change with the change of the speed, and the voltage Uf at both ends of the excitation winding and the voltage Uef on the capacitor C will also change. Such transformation of Uc amplitude changes the amplitude of Uc and Uf, as well as the phase Angle between them and the corresponding current.
Among the three control methods, although the mechanical and regulatory characteristics of amplitude-phase control are the worst, it is the most widely used because of the simple control equipment used in this method and the absence of phase shifting devices.

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