阅读说明：本技术 细纱机电锭供电电路 (Power supply circuit for electric spindle of spinning frame ) 是由 倪远 于 2019-11-22 设计创作，主要内容包括：本发明提供了一种环锭细纱机电锭供电电路,包括交流动力电源、电源转换器、锭位控制器、电机和输送电路,其特征在于动力电源由变压器降压或开关电源转换为安全电压,再分配输送到各锭位控制器,锭位控制器输出的电源供给该锭位的电锭电机,该技术方案,具有系统运转、维护和操作安全性好、锭位控制元器件成本较低、综合性价比较高的特点。(The invention provides an electric spindle power supply circuit of a ring spinning frame, which comprises an alternating current power supply, a power supply converter, spindle controllers, a motor and a conveying circuit, and is characterized in that the power supply is reduced by a transformer or converted into safe voltage by a switching power supply and then redistributed and conveyed to each spindle controller, and the power supply output by the spindle controllers is supplied to the electric spindle motor of the spindle.)

1. The power supply circuit for spinning frame includes AC power supply, power converter, spindle controllers, motor and conveying circuit, and features that the power supply is stepped down by transformer or converted into safe voltage by switch power supply and then redistributed to each spindle controller, and the three-phase pulse power supply output by the spindle controllers is supplied to the motor in the spindle position in the section via the conveying circuit.

2. The ring spinning frame electric spindle power supply circuit according to claim 1, wherein the power converter is a three-phase transformer, the transformer stepping down the ac power supply to a three-phase safe ac voltage, which is fed to the spindle controller in three paths.

3. The ring spinning frame electric spindle supply circuit according to claim 1, wherein the power converter is a three-phase transformer, the three-phase transformer stepping down the ac power supply to three safe ac voltages, which are delivered to the spindle controller in three ways.

4. The ring spinning frame electric spindle power supply circuit according to claim 1, wherein the power converter is a three-phase transformer + three-phase bridge rectifier (filter) AC-DC converter, the three-phase transformer steps down the AC power supply to AC safe voltage, and the AC safe voltage is converted into DC power through the three-phase bridge rectifier and filter and then transmitted to the spindle controller.

5. The ring spinning frame electric spindle power supply circuit according to claim 1, wherein the power converter is three single phase transformers + three bridge rectifier (filter) AC-DC converters, the three single phase transformers step down the AC power supply to three AC safe voltages, and the three AC safe voltages are rectified and filtered to become DC power to be transmitted to the spindle controller in three paths.

6. The ring spinning frame electric spindle supply circuit according to claim 5, characterized in that three single-phase transformers are connected with the alternating current power supply in a star connection of phase line and zero line, and the single-phase bridge rectifier filter is a direct current safety voltage; or the connection is a triangular connection method of interconnection between phase lines, and the single-phase bridge rectifier filter is direct-current safe voltage.

7. The ring spinning frame electric spindle power supply circuit according to claim 1, wherein the power converter is three switching power supplies AC-DC, and the three switching power supplies convert three single-phase or interphase AC power supplies into a safe DC power supply, which is divided into three paths to be supplied to the spindle controller.

8. The ring spinning frame electric spindle power supply circuit according to claim 7, wherein the three switching power supplies are connected with the alternating current power supply in a star connection of a phase line and a zero line, and the single-phase bridge rectifier filter is a direct current safety voltage; or the connection is a triangular connection method of interconnection between phase lines, and the single-phase bridge rectifier filter is direct-current safe voltage.

9. The power supply circuit for electric spindles of ring spinning frame according to any one of claims 1 to 8, wherein the safety voltage output by the segment power supply is 12 to 48 volts, preferably 24 or 36 volts.

10. A ring spinning frame is characterized in that the ring spinning frame is provided with an electric spindle power supply circuit of the ring spinning frame as claimed in any one of claims 1 to 9.

Technical Field

The invention relates to a technical scheme for supplying power to an electric spindle of a ring spinning frame of spinning equipment, in particular to a power supply method and a power supply circuit for an electric spindle of a low-voltage (safe voltage) permanent magnet motor.

Background

The permanent magnet motors including the permanent magnet direct current brushless motor and the like have the characteristics of high efficiency, good rotating speed adaptability and stability, convenience in control and the like, so that the method is a better application choice for driving the electric spindle.

Because the electric spindle motor generally adopts a power supply with safe voltage to supply power, the electric spindle motors of hundreds of ingot positions are connected in parallel to supply power, the ingot positions are densely distributed in a long distance, the total installed capacity is large, and the machine station is a special machine station energy supply type. In the prior art, the power supply scheme generally adopted by the permanent magnet direct current brushless electric spindle motor of the spinning frame is as follows:

1) three-phase power supply (ac) -spindle position rectification (high voltage dc) -spindle position controller (three-phase high voltage pulse) -dc brushless motor (high voltage);

2) the three-phase power supply (ac) -spindle position switching power supply (safe voltage dc) -spindle position controller (three-phase safe voltage pulse) -dc brushless motor (safe voltage), and (representing long-distance to spindle position transportation and short-distance transportation).

In the above power supply scheme, 1) because each link of power supply is high voltage, and the high voltage is transmitted to each spindle position, the safety of operation, maintenance and operation is poor, the cost of high-voltage-grade components is high, and the failure rate is relatively high; 2) the scheme is high-voltage transmitted to each ingot controller, so that the operation, maintenance and operation safety is poor.

Whether the power supply scheme is reasonable or not directly influences the cost, safety, failure rate and other factors related to cost performance of the technical scheme.

Disclosure of Invention

The invention aims to provide a power supply method and a circuit for the safe voltage of an electric spindle motor of a ring spinning frame, which adopts the technical scheme that a high-voltage power supply is reduced by a transformer or is converted into the safe voltage by a switching power supply and then is transmitted to a spindle position, and has the characteristics of good system operation, maintenance and operation safety, lower cost of spindle position control components and parts and higher comprehensive cost.

The technical scheme of the invention is as follows: the spinning frame electricity spindle supply circuit, including alternating current power supply, power converter, spindle controller, motor and conveying circuit, characterized by that the power supply is stepped down by the transformer or switching power supply converts to the safe voltage, redistributes and conveys to each spindle controller, the electric spindle motor of this spindle position of power supply that spindle controller output, namely:

the machine station power source (alternating current) -power converter (safe voltage) -spindle controller (safe voltage) -electric spindle motor (safe voltage). (═ for long distance transport to the spindle position-for short distance transport).

The electric spindle power converter of the spinning frame has the following power conversion modes:

firstly, a power converter is a three-phase transformer for AC-AC conversion, the transformer reduces the voltage of an alternating current power supply into three-phase alternating current safe voltage, and the three-phase alternating current safe voltage is transmitted to an ingot position controller in three paths;

the power converter is AC-AC conversion of three single-phase transformers, and the three single-phase transformers step down the alternating current power supply into three paths of alternating current safe voltages which are transmitted to the spindle controller in three paths;

thirdly, the power converter is a three-phase transformer and three-phase bridge rectification (filtering) AC-AC-DC conversion, the three-phase transformer reduces the voltage of the alternating current power supply into alternating current safe voltage, and the alternating current safe voltage is rectified and filtered into direct current power supply to be transmitted to the spindle controller;

fourthly, the power converter is composed of three single-phase transformers and three bridge rectification (filtering) AC-AC-DC converters, the three single-phase transformers step down the alternating current power supply into three safe alternating current voltages, and the three safe alternating current voltages are rectified and filtered into a direct current power supply which is transmitted to the spindle controller in three paths;

and fifthly, the power converter is three switching power supplies AC-DC, the three switching power supplies convert the three single-phase or interphase alternating current power supplies into direct current safety power supplies, and the direct current safety power supplies are transmitted to the spindle controller in three ways.

In the above one or two conversion modes, the alternating current safety power supply is directly transmitted to the spindle controller.

In the three, four or five conversion mode, the direct current safety power supply is transmitted to the ingot position controller.

When more than one power supply exists in the conversion mode, all the power supplies are distributed and transmitted to all the ingot position controllers in a balanced mode.

The safe voltage output by the power converter is 12-42 volts, and preferably 24 or 36 volts.

Drawings

Fig. 1 is a power supply schematic block diagram of embodiments 1 and 2 of the present invention.

Fig. 2 is a power supply schematic block diagram of embodiment 3 of the present invention.

Fig. 3 is a power supply schematic block diagram of embodiment 4 of the present invention.

Fig. 4 is a power supply schematic block diagram of embodiment 5 of the present invention.

Detailed Description

The spinning frame electricity spindle supply circuit, including alternating current power supply, power converter, spindle controller, motor and conveying circuit, characterized by that the power supply is stepped down by the transformer or switching power supply converts to the safe voltage, redistributes and conveys to each spindle controller, the three-phase pulse power supply that the spindle controller outputs supplies the electricity spindle motor of this spindle position, namely:

the machine station power source (alternating current) -power converter (safe voltage) -spindle controller (safe voltage) -direct current brushless motor (safe voltage). (═ for long distance transport to the spindle position-for short distance transport).

The electric spindle power converter of the spinning frame has the following power conversion modes:

embodiment 1 as shown in fig. 1, a power converter is a three-phase transformer AC-AC converter, and the transformer steps down an AC power supply to a three-phase safe AC voltage, which is sent to an ingot controller in three paths. Such as a transformer, steps down the 380 volt ac power supply to a three-way ac safe voltage (A, B, C).

Embodiment 2 as shown in fig. 1, the power converter is an AC-AC converter with three single-phase transformers, which step down the AC power to three safe AC voltages, which are delivered to the ingot controller in three ways. Such as a transformer, steps down the 220 volt ac power supply to a three way ac safe voltage (A, B, C).

Embodiment 3 as shown in fig. 2, the power converter is a three-phase transformer and a three-phase bridge rectifier (filter) AC-DC converter, the three-phase transformer steps down the AC power supply to an AC safe voltage, and the AC safe voltage is converted into a DC power supply through the three-phase bridge rectifier and filter and then delivered to the ingot controller. For example, a transformer can step down a 380V AC power supply into a three-phase AC safe voltage, and a three-phase bridge rectifier can filter the voltage into a DC safe voltage.

Embodiment 4 as shown in fig. 3, the power converter is three single-phase transformers and three bridge-type rectifying (filtering) AC-DC converters, and the three single-phase transformers step down the AC power supply to three AC safe voltages, which are rectified and filtered to become a DC power supply and then delivered to the ingot position controller (A, B, C) in three paths. Three single-phase transformers are connected with an alternating current power supply in a star connection mode of a phase line and a zero line, if 220V is converted into alternating current safe voltage, and single-phase bridge type rectification filtering is converted into direct current safe voltage; or the connection can be a delta connection method for interconnection between phase lines, for example, 380V is converted into AC safe voltage, and single-phase bridge rectifier filter is converted into DC safe voltage.

Embodiment 5 as shown in fig. 4, the power converter is a three-switch power supply AC-DC, which converts three single-phase or inter-phase AC power supplies into a safe DC power supply, which is divided into three paths to be supplied to the ingot controller (A, B, C). The three switching power supplies are connected with an alternating current power supply in a star connection mode of a phase line and a zero line, for example, 220 volt line voltage is converted into direct current safety voltage, and single-phase bridge type rectification filtering is performed to obtain the direct current safety voltage; or the connection can be a delta connection method for interconnection between phase lines, for example, 380V phase voltage is converted into direct current safe voltage, and single-phase bridge rectifier filter is converted into direct current safe voltage.

In the above embodiment 1 or 2, the ac safety power source is directly supplied to the ingot controller.

In the above embodiment 3, 4 or 5, the dc safety power is supplied to the ingot controller.

In order to obtain the interphase power supply current balance of the three-phase power supply, when more than one power supply exists in the power supply mode, each power supply can be configured in a near-remote distance balanced mode, and the number of the segments can be configured to be integral multiples of the number of the power supplies as far as possible.

The safe voltage output by the power converter is 12-48 volts, and preferably 24 or 36 volts.

For convenience of assembly and maintenance, the power supply and transmission circuit is connected by a connector.

In order to facilitate the respective power supply and management of the spindles on the two sides of the spinning frame, each path of the safety power output by the power converter in each embodiment can be divided into 1-10 branches according to the number of the spindles of the spinning frame, and the branches are conveyed to the spindle controller.

The power supply circuit of the ring spinning frame driven by the electric spindle adopts the technical scheme that any one power converter is adopted to transmit safe voltage to a spindle controller, and the ring spinning frame has the characteristics of good system operation, maintenance and operation safety, lower cost of spindle position control components and higher comprehensive cost performance.