Automatic vacuum packaging chance basic characteristic is the motor of the electromagnetic process of jump, pulse voltage in turn on different control winding, motor is uneven in space motion in the magnetic field, analyzing the movement of the rotor, to analyze the mechanical rotating system's response to the electromagnetic disturbance, mechanical system has a certain moment of inertia.
automatic vacuum
packaging machinery motor rotor movement, in most cases, are all more or less with the nature of the oscillation, in single pulse, the rotor motion attenuation of vibration;
Under the effect of continuous pulse, the movement is forced vibration.
In the process of vibration frequency, amplitude and attenuation, and linked with the resonance and out-of-step and so on, all depends on the parameters of the electromagnetic mechanical systems, including the shape of the electromagnetic torque curve, etc.
1.
Automatic vacuum packaging machine basic expression formula
including motion equation and circuit equation
M, for fully automatic vacuum packaging machinery motor electromagnetic torque, its positive direction from the direction of the Angle increases.
Its value shall be equal to the value of the current when the same static torque, the two component corresponding to the current electromagnetic torque can be seen as composed of two component, a component is in the winding current component and function of maladjustment Angle, M21 (
, 0)
, known as synchronous torque;
Another component is a function of the winding current component and angular velocity and M2 (
,D,A)
, known as asynchronous torque and damping torque.
M = M21 + M2
M1 as the load torque, the positive direction is in the direction of the Angle decreases, it is determined by the load, the nature of relationship with engine speed change is varied, under special circumstances it may be a corner position function, common have so several types,
such as: (
1)
Thousands of friction torque (
Ma)
, its value has nothing to do with the speed and direction is constant and movement in the opposite direction, that is contrary to the direction of the angular velocity.
By taking the positive direction, when the angular velocity as the timing is also a positive, angular velocity is negative when it is negative, the angular velocity is zero is discontinuous points, expressed in mathematical formulas can be written as,
Mu = sign of sig function as symbols, it's worth for timing is equal to 080 t + 1, D8 / D equals - is negative
1, D8 / = 0, it also is equal to zero.
fixed direction of the load torque (
M2)
, its size and the direction, has nothing to do with speed.
When the motor experiment farmar is of this type.
When the motor rotating towards a certain direction, braking effect, and to the opposite direction, the acceleration effect.
so, in the process of vibration speed under the condition of alternating, its role and dry friction load is not the same.
But do not change in the direction of the rotating speed, the effect of both no difference.
now that you know basic expression and basic parameters of the automatic vacuum packaging machine, if can know more about
packing machine have a more articles on our website.
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