CN-122001158-A - Non-effective potential suppression structure for small induction synchronizer

Abstract

A non-effective potential suppression structure for a small-sized induction synchronizer belongs to the technical field of induction synchronizers. The invention aims at the application requirements of the induction synchronizer on high precision and small volume. The stator effective conductor of the induction synchronizer is arranged on the front surface of the stator base plate and is arranged along the whole circumference of the stator base plate, the stator base plate and the rotor base plate of the induction synchronizer are made of ferromagnetic materials, the stator ineffective conductor of the induction synchronizer is arranged on the back surface of the stator base plate and is arranged along the whole circumference, the stator ineffective conductor is connected with the stator effective conductor through dense through holes, and the stator effective conductor and the rotor conductor of the induction synchronizer are arranged in radial alignment. The stator design scheme based on the double-layer metal-based MCPCB utilizes ferromagnetic materials to improve signal strength and shield non-effective potential, improves precision and signal-to-noise ratio, and reduces space occupation in radial and axial directions at the same time so as to meet the application requirements of the induction synchronizer in a small-sized precise servo system.

Inventors

• LIU CHENGJUN
• SUN JIANFEI
• ZHANG XINBIN

Assignees

• 哈尔滨工业大学

Dates

Publication Date

20260508

Application Date

20260206

Claims (6)

1. 1. A non-effective potential suppression structure for a small induction synchronizer is characterized in that a stator effective conductor (2) of the induction synchronizer is arranged on the front face of a stator base plate (1) and is arranged along the whole circumference of the stator base plate (1), the stator base plate (1) and a rotor base plate (6) of the induction synchronizer are made of ferromagnetic materials, the stator non-effective conductor of the induction synchronizer is arranged on the back face of the stator base plate (1) and is arranged along the whole circumference, the stator non-effective conductor is connected with the stator effective conductor through dense through holes arranged on the stator base plate (1), and the stator effective conductor (2) and the rotor conductor (3) of the induction synchronizer are arranged in radial alignment.
2. 2. The non-effective potential suppressing structure for a small induction synchronizer according to claim 1, wherein the stator substrate (1) has a thickness of 1-2mm and the rotor substrate (6) has a thickness of 2-3mm.
3. 3. The non-effective potential suppressing structure for a miniature inductive synchronizer of claim 1 wherein the stator and rotor windings of said inductive synchronizer are uniform in radial dimension.
4. 4. The non-effective potential suppressing structure for a small-sized induction synchronizer according to claim 1, wherein the stator non-effective conductor is an inter-group connection (4) of a stator winding of the induction synchronizer and a conductor end (5).
5. 5. The non-effective potential suppressing structure for a miniature inductive synchronizer of claim 1 wherein said ferromagnetic material is a high permeability permalloy.
6. 6. The non-effective potential suppressing structure for a small-sized induction synchronizer according to claim 1, wherein the stator non-effective conductor of the induction synchronizer is fabricated on the back surface of the stator substrate (1) by a double-layer metal-based MCPCB technique.

Description

Non-effective potential suppression structure for small induction synchronizer Technical Field The invention belongs to the technical field of induction synchronizers, and particularly relates to a non-effective potential suppression structure for a small-sized induction synchronizer. Background The induction synchronizer is an electromagnetic position sensor which has ultrahigh precision and is suitable for extreme environments, is widely applied to various high-precision servo control systems, has the same electromagnetic principle as a rotary transformer, generates an alternating magnetic field through an exciting winding, generates a pair of constant-amplitude orthogonal sine and cosine signals through an output end sine and cosine winding, and completes angle measurement through shaft angle transformation. Since the number of poles of the induction synchronizer is very high (360 poles or 720 poles), the induction synchronizer has extremely high angular accuracy and resolution. At present, all position sensors face miniaturization challenges, angle measurement precision is the most important index of an induction synchronizer, and meanwhile, the requirements of users in the tip field can be met by taking the structure of the induction synchronizer with precision, size and anti-interference capability into consideration. As shown in fig. 1, the structure of the existing induction synchronizer is that the stator and rotor substrates are made of aluminum, the stator side is excited by a non-contact transformer, the stator side is output, the stator conductors are reversely connected in series at the back of the substrate, and the structure mainly faces the following two problems in miniaturization: 1. The amplitude of the output signal of the induction synchronizer is in direct proportion to the radial effective coupling length, the original signal is weak (mV level) under the traditional structure, the original output signal is smaller under the small size, the signal to noise ratio is reduced, and meanwhile, the requirement on a pre-amplifying circuit is higher. 2. The radial conductor of the induction synchronizer is an effective conductor, and the end part of the circumferential conductor and the inter-group connection wire on the back surface of the stator can generate ineffective induced potential, so that the accuracy is reduced. The conventional structure suppresses the influence of the inter-group connection between the conductor end and the back by radially dislocating the stator and rotor conductors and ensuring the thickness of the stator substrate. But this space utilization is low and in small inductive synchronizers the space for the active conductors is further compressed. In recent years, a precise servo system is rapidly developed, the requirements on the precision and the size of a position sensor are higher and higher, and the prior induction synchronizer structure cannot meet the requirements on the advanced field. No structure is seen in the current products to shield the non-effective potential (non-effective potential refers to the induced potential coupled between non-radial conductors) by a double layer metal-based PCB. Disclosure of Invention The invention aims at providing a non-effective potential suppression structure for a small-sized induction synchronizer aiming at the application requirements of the induction synchronizer on high precision and small volume. The stator design scheme based on the double-layer metal-based MCPCB utilizes ferromagnetic materials to improve signal strength and shield non-effective potential, improves precision and signal-to-noise ratio, and reduces space occupation in radial and axial directions at the same time so as to meet the application requirements of the induction synchronizer in a small-sized precise servo system. In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: The non-effective potential suppression structure for the miniature induction synchronizer is characterized in that stator effective conductors of the induction synchronizer are arranged on the front surface of a stator base plate and are arranged along the whole circumference of the stator base plate, the stator base plate and a rotor base plate of the induction synchronizer are made of ferromagnetic materials, the stator non-effective conductors of the induction synchronizer are arranged on the back surface of the stator base plate and are arranged along the whole circumference, the stator non-effective conductors are connected with the stator effective conductors through dense through holes arranged on the stator base plate, and the stator effective conductors and the rotor conductors of the induction synchronizer are arranged in radial alignment. Further, the thickness of the stator base plate is 1-2mm, and the thickness of the rotor base plate is 2-3mm. Further, the radial dimensions of the stator and rotor windings of the i