阅读说明：本技术 一种扭矩加载方法、系统及装置 (Torque loading method, system and device ) 是由 简优宗 杨合民 胡静 王小红 侯凯 原晓琦 郭海山 吴彦飞 程谦 张青杰 隗华荣 于 2021-07-23 设计创作，主要内容包括：本发明公开了一种扭矩加载方法、系统及装置,本发明在低转速时,仅有磁粉制动器输出扭矩,在低转速向高转速切换过程中,磁粉制动器的输出扭矩逐渐降低,电涡流制动器的输出扭矩逐渐增大,在高转速时,仅有电涡流制动器向电机输出扭矩,实现了兼顾高低转速工况的扭矩加载方式。(The invention discloses a torque loading method, a torque loading system and a torque loading device.)

1. A method of torque loading, comprising:

controlling the magnetic powder brake to output torque to the motor in response to the low-speed running of a motor transmission shaft, and controlling the eddy current brake coaxially connected with the magnetic powder brake not to output torque;

responding to the switching of a motor transmission shaft from a low rotating speed to a high rotating speed, controlling the output torque of the magnetic powder brake to gradually decrease and controlling the output torque of the eddy current brake to gradually increase under the condition of keeping the inconvenient output torque;

and controlling the eddy current brake to output torque to the motor and controlling the magnetic powder brake not to output torque in response to the high-speed operation of the motor transmission shaft.

2. A torque loading method according to claim 1, wherein the output torque of the magnetic particle brake is controlled by controlling the input current of the magnetic particle brake; the output torque of the magnetic powder brake is controlled by controlling the input current of the eddy current brake.

3. The torque loading method according to claim 1, wherein the eddy current brake is controlled to output the torque to the motor, the magnetic particle brake is controlled to be disconnected from the eddy current brake, and the magnetic particle brake is controlled not to output the torque in response to the motor shaft operating at a high rotation speed.

4. A torque loading system, comprising:

the low rotating speed control module: controlling the magnetic powder brake to output torque to the motor in response to the low-speed running of a motor transmission shaft, and controlling the eddy current brake coaxially connected with the magnetic powder brake not to output torque;

a switching control module: responding to the switching of a motor transmission shaft from a low rotating speed to a high rotating speed, controlling the output torque of the magnetic powder brake to gradually decrease and controlling the output torque of the eddy current brake to gradually increase under the condition of keeping the inconvenient output torque;

the high rotating speed control module: and controlling the eddy current brake to output torque to the motor and controlling the magnetic powder brake not to output torque in response to the high-speed operation of the motor transmission shaft.

5. A torque loading system according to claim 4, wherein the output torque of the magnetic particle brake is controlled by controlling the input current to the magnetic particle brake; the output torque of the eddy current brake is controlled by controlling the input current of the eddy current brake.

6. The torque loading system of claim 4, wherein the high speed control module: and responding to the high-rotating-speed operation of a motor transmission shaft, controlling the eddy current brake to output torque to the motor, controlling the magnetic powder brake to be disconnected with the eddy current brake, and controlling the magnetic powder brake not to output torque.

7. A torque loading device is characterized by comprising a controller, an eddy current brake, a coupler and a magnetic powder brake, wherein the eddy current brake, the coupler and the magnetic powder brake are coaxially connected, the eddy current brake is coaxially and externally connected with a motor transmission shaft, the controller is connected with the eddy current brake, the coupler and the magnetic powder brake, and the output torque of the eddy current brake and/or the magnetic powder brake is controlled by the method of claims 1-3.

8. The torque loading device of claim 7, wherein the controller is connected to the eddy current brake via a first current source and the controller is connected to the magnetic particle brake via a second current source.

9. The torque loading device of claim 7 wherein the controller is coupled to the coupling via a clutch controller.

10. The torque loading device according to claim 7, further comprising a torque sensor and an encoder coaxially connected to the motor transmission shaft, wherein both the torque sensor and the encoder are connected to a signal acquisition device, and the signal acquisition device is connected to the controller.

Technical Field

The invention relates to a torque loading method, a torque loading system and a torque loading device, and belongs to the field of motor transmission.

Background

The torque loading is used in the occasions of constant tension control (paper making, textile and the like), variable frequency development test beds and the like, the torque is usually generated by adopting power such as electric power, hydraulic pressure and the like, the current common torque loading mode is a frequency converter loading mode, a hydraulic loading mode and the like, the loading modes are usually applied under specific working conditions, and the torque loading mode which gives consideration to high and low rotating speed working conditions is not available.

Disclosure of Invention

The invention provides a torque loading method, a torque loading system and a torque loading device, and solves the problem that no torque loading mode with high and low rotating speed working conditions is taken into consideration at present.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

a torque loading method, comprising:

controlling the magnetic powder brake to output torque to the motor in response to the low-speed running of a motor transmission shaft, and controlling the eddy current brake coaxially connected with the magnetic powder brake not to output torque;

responding to the switching of a motor transmission shaft from a low rotating speed to a high rotating speed, controlling the output torque of the magnetic powder brake to gradually decrease and controlling the output torque of the eddy current brake to gradually increase under the condition of keeping the inconvenient output torque;

and controlling the eddy current brake to output torque to the motor and controlling the magnetic powder brake not to output torque in response to the high-speed operation of the motor transmission shaft.

Controlling the output torque of the magnetic powder brake by controlling the input current of the magnetic powder brake; the output torque of the magnetic powder brake is controlled by controlling the input current of the eddy current brake.

And responding to the high-rotating-speed operation of a motor transmission shaft, controlling the eddy current brake to output torque to the motor, controlling the magnetic powder brake to be disconnected with the eddy current brake, and controlling the magnetic powder brake not to output torque.

A torque loading system, comprising:

the low rotating speed control module: controlling the magnetic powder brake to output torque to the motor in response to the low-speed running of a motor transmission shaft, and controlling the eddy current brake coaxially connected with the magnetic powder brake not to output torque;

a switching control module: responding to the switching of a motor transmission shaft from a low rotating speed to a high rotating speed, controlling the output torque of the magnetic powder brake to gradually decrease and controlling the output torque of the eddy current brake to gradually increase under the condition of keeping the inconvenient output torque;

the high rotating speed control module: and controlling the eddy current brake to output torque to the motor and controlling the magnetic powder brake not to output torque in response to the high-speed operation of the motor transmission shaft.

Controlling the output torque of the magnetic powder brake by controlling the input current of the magnetic powder brake; the output torque of the eddy current brake is controlled by controlling the input current of the eddy current brake.

The high rotating speed control module: and responding to the high-rotating-speed operation of a motor transmission shaft, controlling the eddy current brake to output torque to the motor, controlling the magnetic powder brake to be disconnected with the eddy current brake, and controlling the magnetic powder brake not to output torque.

A torque loading device comprises a controller, an eddy current brake, a coupler and a magnetic powder brake, wherein the eddy current brake, the coupler and the magnetic powder brake are sequentially and coaxially connected, the eddy current brake is coaxially and externally connected with a motor transmission shaft, the controller is connected with the eddy current brake, the coupler and the magnetic powder brake, and a torque loading method is adopted to control the output torque of the eddy current brake and/or the magnetic powder brake.

The controller is connected with the eddy current brake through a first current source, and the controller is connected with the magnetic powder brake through a second current source.

The controller is connected with the coupler through the clutch controller.

The motor driving shaft is coaxially connected with the motor driving shaft, the motor driving shaft and the motor driving shaft, the motor driving shaft is coaxially connected with the motor driving shaft, the motor driving shaft and the motor driving shaft are coaxially connected with the motor driving shaft, the motor driving shaft is coaxially connected with the motor driving shaft, and the motor driving shaft is also comprises a motor driving shaft, and a torque sensor and a motor driving shaft, and a torque sensor and a motor, and a signal acquisition device, and a motor driving shaft, and a motor, and a signal acquisition device, and a motor, which are respectively, and a motor, and.

The invention achieves the following beneficial effects: in the invention, only the magnetic powder brake outputs torque at low rotating speed, the output torque of the magnetic powder brake is gradually reduced and the output torque of the eddy current brake is gradually increased in the switching process from the low rotating speed to the high rotating speed, and only the eddy current brake outputs torque to the motor at the high rotating speed, thereby realizing a torque loading mode giving consideration to the working conditions of high and low rotating speeds.

Drawings

FIG. 1 is a schematic view of the apparatus of the present invention;

FIG. 2 is a graph of torque, power limit values, and corresponding brake control current for an example.

Detailed Description

The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

A method of torque loading comprising the steps of:

1) controlling the magnetic powder brake to output torque to the motor in response to the low-speed running of a motor transmission shaft, and controlling the eddy current brake coaxially connected with the magnetic powder brake not to output torque;

2) responding to the switching of a motor transmission shaft from a low rotating speed to a high rotating speed, controlling the output torque of the magnetic powder brake to gradually decrease and controlling the output torque of the eddy current brake to gradually increase under the condition of keeping the inconvenient output torque;

the process of switching the motor transmission shaft from high rotating speed to low rotating speed is opposite to the process of switching the motor transmission shaft from low rotating speed to high rotating speed;

3) and responding to the high-rotating-speed operation of a motor transmission shaft, controlling the eddy current brake to output torque to the motor, controlling the magnetic powder brake to be disconnected with the eddy current brake, and controlling the magnetic powder brake not to output torque.

The output torque is related to the input current, namely the output torque of the magnetic powder brake is controlled by controlling the input current of the magnetic powder brake; the output torque of the magnetic powder brake is controlled by controlling the input current of the eddy current brake.

When the low-speed rotation, only there is magnetic powder brake output torque, can avoid the poor defect of linearity of eddy current brake under the low-speed rotation, switch the in-process at the low-speed rotation to high-speed rotation, magnetic powder brake's output torque reduces gradually, eddy current brake's output torque increases gradually, when high-speed rotation, only eddy current brake is to motor output torque, can avoid magnetic powder brake card powder phenomenon under the high-speed rotation, under the rotational speed operating mode of difference, switch different braker, the moment of torsion loading mode of considering high low-speed rotation operating mode has been realized.

The corresponding software system of the method, namely the torque loading system, comprises:

the low rotating speed control module: controlling the magnetic powder brake to output torque to the motor in response to the low-speed running of a motor transmission shaft, and controlling the eddy current brake coaxially connected with the magnetic powder brake not to output torque;

a switching control module: responding to the switching of a motor transmission shaft from a low rotating speed to a high rotating speed, controlling the output torque of the magnetic powder brake to gradually decrease and controlling the output torque of the eddy current brake to gradually increase under the condition of keeping the inconvenient output torque;

and responding to the high-rotating-speed operation of a motor transmission shaft, controlling the eddy current brake to output torque to the motor, controlling the magnetic powder brake to be disconnected with the eddy current brake, and controlling the magnetic powder brake not to output torque.

Based on the method, the torque loading device shown in fig. 1 can be constructed, and specifically comprises a controller (not shown in the figure), an eddy current brake, a coupling and a magnetic powder brake; the eddy current brake, the coupler and the magnetic powder brake are coaxially connected in turn, the eddy current brake is coaxially externally connected with a motor transmission shaft, so that the motor transmission shaft, the eddy current brake, the coupler and the magnetic powder brake are coaxial, the controller is connected with the eddy current brake, the coupler and the magnetic powder brake, and the torque loading method is adopted to control the output torque of the eddy current brake and/or the magnetic powder brake.

The torque output of the eddy current brake and the magnetic powder brake is related to the input current; therefore, the controller is connected with the eddy current brake through the first current source, namely the controller sends a control instruction to the first current source, and the first current source outputs current corresponding to the control instruction, so that the controller controls the output torque of the eddy current brake; the controller is connected with the magnetic powder brake through the second current source, namely the controller sends a control instruction to the second current source, and the second current source outputs current corresponding to the control instruction, so that the control of the controller on the output torque of the magnetic powder brake is realized.

When the magnetic powder brake runs at a low rotating speed, the output current of the first current source is 0, the torque is provided by the magnetic powder brake, and the magnitude is controlled by the second current source; when the motor runs at a high rotating speed, the second current source outputs current that the torque is provided by the eddy current brake and the magnitude is controlled by the first current source; and in the process of switching from low rotating speed to high rotating speed, the output current of the second current source is gradually reduced, the output current of the first current source is gradually increased, and when the output current of the second current source is reduced to 0, the output value of the first current source corresponds to the system torque value.

The coupler adopts quick detach formula coupler, realizes through the coupler that eddy current brake and magnetic powder brake are connected, when motor drive shaft low rotational speed moves, the coupler does not break off, and eddy current brake accompanies the magnetic powder brake and rotates, but not output torque, when motor drive shaft high rotational speed moves, the coupler disconnection makes eddy current brake and magnetic powder brake break away from, can effectively protect magnetic powder brake, avoids the unsmooth condition of magnetic, and magnetic powder brake stops under the effect of resistance.

When the open-loop system or the precision requirement is higher, the device also comprises a torque sensor and an encoder which are coaxially connected with the motor transmission shaft, wherein the torque sensor and the encoder are both connected with a signal acquisition device, and the signal acquisition device is connected with a controller; the encoder is used for acquiring the rotation angle, and the torque sensor is used for acquiring torque.

The allowable torque value, power value, and corresponding control signal setting curve of the device are described by way of specific examples, and specifically, as shown in fig. 2, the pulse is a clutch release control signal.

When the rotating speed is less than 840 r/min, the torque of the device can reach the maximum torque limit value of the motor, and the power of the device changes in direct proportion with the rotating speed; when the rotating speed exceeds 840 r/min, the power of the device is limited by the maximum power of the motor, and the torque of the system and the rotating speed are changed in inverse proportion.

When the rotating speed is less than 250 r/s, the first current source outputs current 0, the eddy current brake does not output torque, the torque is output by the magnetic powder brake, and the magnitude of the torque is linearly controlled by the second current source.

When the rotating speed is greater than 250 revolutions per minute, the output current of the second current source is reduced according to the calculation rate, and the output current of the first current source begins to increase so as to ensure that the output torque of the system reaches a target value; the output current of the second current source is decreased at the rate of current change, so that the current is decreased to 0 within 100 rpm of the change of the rotating speed.

When the rotating speed is greater than 350 r/m, the output current of the second current source is 0, the magnetic powder brake does not output torque, the torque is output by the eddy current brake, and the magnitude of the torque is linearly controlled by the second current source.

When the rotating speed reaches 360 revolutions per minute, the clutch control coupler is separated, the magnetic powder brake is separated, and the rotating speed is gradually reduced under the action of resistance until the rotating speed is stopped.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

The present invention is not limited to the above embodiments, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention are included in the scope of the claims of the present invention which are filed as the application.