Induction synchronizer is a kind of electromagnetic position detection element, which is divided into linear type and rotary type (disc type) according to its structural characteristics. The linear induction synchronizer is composed of a fixed length and a sliding scale; the rotary induction synchronizer is composed of a stator and a rotor. The former is used to measure linear displacement and is used in a fully closed-loop servo system, and the latter is used to measure angular displacement and is used in a semi-closed-loop servo system. Their working principles are similar to resolvers.
The working principle of inductosynThe induction synchronizer uses the relative displacement between the excitation winding and the induction winding, due to the change of electromagnetic coupling, the induced voltage in the induction winding changes with the change of the displacement, so as to detect the displacement. As shown in the picture.
The winding on the sliding scale of the induction synchronizer is the excitation winding, and the winding on the fixed length is the induction winding.
The fixed length is fixed on the bed, and the sliding rule is installed on the moving parts of the machine tool. Through the measurement of the induced voltage, the displacement can be accurately measured.
A certain alternating excitation voltage is added to the excitation winding, and the induction electromotive force of the same frequency is generated in the fixed-length winding, and its amplitude changes with the movement of the slider in a cosine law. The slider moves one pitch, and the induced electromotive force changes one cycle.
The signal processing principle of inductosyn1. Magnitude discriminating type
The displacement is measured by detecting the amplitude of the induced electromotive force. As long as the phase difference θ1 between Us and Uc can be measured, the relative displacement x of the sliding ruler and the fixed ruler can be obtained.
2. Phase detection type
The displacement is measured by detecting the phase of the induced electromotive force. The relative displacement x has a linear relationship with the phase angle θ. As long as the phase angle θ can be measured, the displacement x can be obtained.
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