Search

CN-224218301-U - Weft accumulator control system

CN224218301UCN 224218301 UCN224218301 UCN 224218301UCN-224218301-U

Abstract

The utility model provides a weft accumulator control system which comprises a motor, a motor control board and an inductive encoder, wherein the motor comprises a stator and a rotor, the inductive encoder comprises a stator plate and a rotor plate, regular copper coating is arranged on the rotor plate, a coil group, a signal conditioning circuit, a stator plate control module and a stator plate angle transmission and position correction module which are sequentially connected are arranged on the stator plate, the coil group comprises a stator plate excitation coil, a stator plate single-turn induction coil and a stator plate multi-turn induction coil, the motor control board comprises an electronic control module and a motor driving module, the electronic control module is connected with the stator plate angle transmission and position correction module to obtain angle information and position correction information of the rotor plate, the motor driving module is connected with a stator of the motor, the motor control board corrects the position of the motor according to the position correction information, and the motor control board controls the motor to operate according to the angle information of the rotor plate.

Inventors

  • LIU XIANGYANG

Assignees

  • 上海诚桓工业技术有限公司

Dates

Publication Date
20260508
Application Date
20250729

Claims (9)

  1. 1. The weft accumulator control system is characterized by comprising a motor, a motor control board and an inductive encoder; The motor comprises a stator and a rotor; The inductive encoder comprises a stator plate and a rotor plate, wherein the rotor plate is provided with regular copper coating, and the stator plate is provided with a coil group, a signal conditioning circuit, a stator plate control module and a stator plate angle transmission and position correction module which are sequentially connected; The motor control board comprises an electronic control module and a motor driving module, wherein the electronic control module is connected with the stator plate angle transmission and position correction module to obtain angle information and position correction information of the rotor plate, the motor driving module is connected with a stator of the motor, the motor control board corrects the position of the motor according to the position correction information, and the motor control board controls the motor to run according to the angle information of the rotor plate.
  2. 2. The weft accumulator control system according to claim 1, wherein the signal conditioning circuit comprises an output signal conditioning unit and an input signal conditioning unit, the output signal conditioning unit is connected with the stator plate excitation coil and adjusts an excitation signal output to the stator plate excitation coil, the input signal conditioning unit is multiple paths, and the multiple paths of input signal conditioning units are respectively connected with the stator plate single-turn induction coil and the stator plate multiple-turn induction coil and perform signal conditioning on an induction signal input to the input signal conditioning unit.
  3. 3. The weft accumulator control system according to claim 2, wherein the stator plate multi-turn induction coil is N turns, the stator plate single-turn induction coil is 1 turn, the stator plate excitation coil receives the excitation signal output by the output signal conditioning unit to generate a magnetic field, and the rotor plate rotates along with the rotor to cut the magnetic field of the stator plate excitation coil when the motor is in operation, so that the stator plate multi-turn induction coil and the stator plate single-turn induction coil generate sine/cosine signal induction signals, and when the rotor plate rotates once, the stator plate multi-turn induction coil induces N cycles of sine/cosine signals as angle induction signals, and the stator plate single-turn induction coil induces 1 cycle of sine/cosine signals as absolute position reference signals.
  4. 4. A pick holder control system as claimed in claim 3, wherein the input signal conditioning unit conditions the input angle sensing signal and absolute position reference signal and transmits the conditioned angle sensing signal and absolute position reference signal to the stator plate control module, and the stator plate control module decodes and computes the conditioned angle sensing signal and absolute position reference signal into rotor angle information and absolute zero information and transmits the rotor angle information and absolute zero information to the stator plate angle transmission and position correction module.
  5. 5. A weft accumulator control system according to claim 2, characterized in that the output signal conditioning unit comprises a resistor R 23 , a capacitor C 10 , an amplifier U 5B , the positive electrode of the resistor R 23 is connected with the stator plate control module, the negative electrode of the resistor R 23 is connected with the input negative electrode of the amplifier U 5B , the positive electrode of the capacitor C 10 is connected with the negative electrode of the resistor R 23 , the negative electrode of the capacitor C 10 is grounded, the input positive electrode of the amplifier U 5B is connected with the collector electrode of the transistor Q 6 , the output end of the amplifier U 5B is connected with the base electrode of the transistor Q 6 , the collector electrode of the transistor Q 6 is connected with the resistor R 2 and then is connected with the positive electrode of the stator plate excitation coil, the emitter electrode of the transistor Q 6 is connected with the power supply V ref , and the negative electrode of the stator plate excitation coil is connected with the stator plate control module.
  6. 6. The weft accumulator control system according to claim 2, wherein one of the input signal conditioning units connected to the stator plate single turn induction coil includes a resistor R 3 , a resistor R 4 , a capacitor C 2 , a resistor R 11 , Comparator U 1B , digital potentiometer R 15 , The device comprises a resistor R 19 and a capacitor C 6 , wherein the resistor R 3 is connected with the positive electrode of a single-coil induction coil of a stator plate and the input positive electrode of a comparator U 1B , the resistor R 4 is connected with the negative electrode of the single-coil induction coil of the stator plate and the input negative electrode of the comparator U 1B , the capacitor C 2 is connected with the input positive electrode of the comparator U 1B and the input negative electrode of the comparator U 1B , the positive electrode of the resistor R 11 is connected with the input positive electrode of the comparator U 1B , the negative electrode of the resistor R 11 is grounded, the output end of the comparator U 1B is connected with the control module of the stator plate after being connected with the resistor R 19 in series, the two ends of a digital potentiometer R 15 are respectively connected with the input negative electrode of the comparator U 1B and the output end of the comparator U 1B , the regulating end of the digital potentiometer R 15 is connected with the control module of the stator plate, the positive electrode of the capacitor C 6 is connected with the negative electrode of the resistor R 19 , and the negative electrode of the capacitor C 6 is grounded.
  7. 7. The weft accumulator control system according to claim 2, wherein the stator plate control module includes at least a signal processing chip U 1 , and the output signal conditioning unit and the plurality of input signal conditioning units of the signal conditioning circuit are connected to a signal processing chip U 1 .
  8. 8. The weft accumulator control system according to claim 1, wherein the stator plate angle transmission and position correction module comprises at least a signal processing chip U 2 , a resistor R 1 , a resistor R 24 , a transistor Q 1 , Resistor R 25 , resistor R 26 , The signal processing chip U 2 is connected with the stator plate control module and the electronic control module for data interaction, the positive electrode of the resistor R 1 is connected with the electronic control module, the negative electrode of the resistor R 1 is connected with the base electrode of the triode Q 1 , the collector electrode of the triode Q 1 is connected with the stator plate control module, the emitting electrode of the triode Q 1 is grounded, the resistor R 24 is connected with the base electrode of the triode Q 1 and the emitting electrode of the triode Q 1 , the positive electrode of the resistor R 25 is connected with the stator plate control module, the negative electrode of the resistor R 25 is connected with the base electrode of the triode Q 9 , the collector electrode of the triode Q 9 is connected with the electronic control module, the emitting electrode of the triode Q 9 is grounded, and the resistor R 26 is connected with the base electrode of the triode Q 9 and the emitting electrode of the triode Q 9 .
  9. 9. The weft accumulator control system according to claim 1, wherein the electronic control module comprises at least a signal processing chip U 3 , the motor driving module comprises at least a three-phase driving unit, the three-phase driving unit is respectively connected with the stator of the motor and the electronic control module, wherein one phase of driving unit comprises at least a semiconductor power device Q 2 and a semiconductor power device Q 3 , the base electrode of the semiconductor power device Q 2 and the base electrode of the semiconductor power device Q 3 are respectively connected with the electronic control module, the emitter electrode of the semiconductor power device Q 2 and the collector electrode of the semiconductor power device Q 3 are connected with the stator of the motor, and the collector electrode of the semiconductor power device Q 2 and the emitter electrode of the semiconductor power device Q 3 are respectively connected with the positive electrode and the negative electrode of a capacitor C 1 .

Description

Weft accumulator control system Technical Field The utility model belongs to the technical field of weft accumulator control, and particularly relates to a weft accumulator control system. Background The existing electronic weft accumulator is driven by a motor to drive a yarn winding assembly to wind and store yarns, and actively control or passively release weft yarns to keep a certain number of weft yarns on a yarn storage drum so as to enable weft insertion devices such as a loom to continuously or intermittently insert weft yarns. The position detection of the motor is generally controlled by a sensorless algorithm, a hall position sensor, a photoelectric encoder or a magnetic induction encoder. The sensorless algorithm and the Hall position sensor mode have the advantages of poor control response at low speed, large speed fluctuation, high precision of the photoelectric encoder, quick response, easiness in being influenced by dust and oil pollution, incapability of achieving good sealing due to the fact that the weft accumulator system is a hollow shaft motor, influence on the use stability of the photoelectric encoder, various solutions of the magnetic induction encoder are realized, the low-cost application scheme on the hollow shaft is still immature, the response is insufficient when the magnetic induction encoder is applied at high rotating speed, and the application on the weft accumulator is limited. The existing inductive encoder is applied to occasions such as motors, joint motors and the like. The encoder feeds back the detected position signals to the control system in a pulse or communication mode, and the signal conditioning aiming at the application scene is lacked, so that the detection precision and stability are affected. Therefore, it is necessary to provide a weft accumulator control system that improves response speed, detection accuracy, and stability. Disclosure of utility model The utility model provides a weft accumulator control system which improves response speed, detection precision and stability. In order to achieve the above purpose, the present utility model provides the following technical solutions. A weft accumulator control system comprises a motor, a motor control board and an inductive encoder; The motor comprises a stator and a rotor; The inductive encoder comprises a stator plate and a rotor plate, wherein the rotor plate is provided with regular copper coating, and the stator plate is provided with a coil group, a signal conditioning circuit, a stator plate control module and a stator plate angle transmission and position correction module which are sequentially connected; The motor control board comprises an electronic control module and a motor driving module, wherein the electronic control module is connected with the stator plate angle transmission and position correction module to obtain angle information and position correction information of the rotor plate, the motor driving module is connected with a stator of the motor, the motor control board corrects the position of the motor according to the position correction information, and the motor control board controls the motor to run according to the angle information of the rotor plate. The input signal conditioning unit is multipath, and the multipath input signal conditioning unit is respectively connected with the single-turn induction coil of the stator plate and the multi-turn induction coil of the stator plate to perform signal conditioning on induction signals input to the input signal conditioning unit. The stator plate excitation coil receives an excitation signal output by the output signal conditioning unit to generate a magnetic field, and when the motor operates, the rotor plate rotates along with the rotating shaft to cut the magnetic field of the stator plate excitation coil, so that the stator plate multi-turn induction coil and the stator plate single-turn induction coil generate sine/cosine signal induction signals, and when the rotor plate rotates for one circle, the stator plate multi-turn induction coil inducts N cycles of sine/cosine signals to serve as angle induction signals, and the stator plate single-turn induction coil inducts 1 cycle of sine/cosine signals to serve as absolute position reference signals. Preferably, the input signal conditioning unit conditions the input angle sensing signal and the absolute position reference signal, and then sends the conditioned angle sensing signal and the conditioned absolute position reference signal to the stator plate control module, and the stator plate control module decodes and calculates the conditioned angle sensing signal and the conditioned absolute position reference signal into rotor angle information and absolute zero information and sends the rotor angle information and the absolute zero information to the stator plate angle transmission and position correction module. Preferably, the output signal conditioning unit comprise