TW202319659A - Auxiliary system for controlling magnetic bearing and method - Google Patents

Abstract

An auxiliary system for controlling magnetic bearing is disclosed in the present invention. The auxiliary system includes a rule module, a controlling module, a timer, and a judging module. The auxiliary system is utilized to set a rule, and make a drive command of a magnetic bearing system increase gradually by the rule.

Description

Auxiliary control system and method for magnetic bearing

The present invention relates to a system and its method, in particular to a magnetic bearing auxiliary control system and its method.

Magnetic bearing assemblies have been widely used in various fields, such as aerospace, energy, and measurement fields, and are usually driven by high-speed motors. Therefore, the control rigidity of magnetic bearing assemblies will be adjusted as high as possible. Avoid the loss of control of the magnetic bearing assembly at high frequency rotation speed. Please refer to the first figure to the fourth figure, wherein the first figure is a schematic diagram showing a prior art magnetic bearing control system; the second figure is a schematic diagram showing a prior art magnetic bearing assembly; the third figure is a schematic diagram showing a prior art drive The schematic diagram of the command; and, the fourth diagram is a schematic diagram showing the position of the rotor center of the magnetic bearing assembly of the prior art.

As shown in the figure, a magnetic bearing control system PA1 includes a position controller PA11, a plurality of power amplifiers PA12a, PA12b, a magnetic bearing assembly PA13 and a position feedback sensor PA14. The magnetic bearing assembly PA13 at least includes a magnetic bearing rotor PA131 , a magnetic bearing stator PA132 , a safety bearing PA133 and a sensing module PA134 .

The position controller PA11 generates a driving command to drive the magnetic levitation rotor PA131 to float up and separate from the safety bearing PA133, wherein the driving command includes a parameter value and a current value. The parameter value is the value of the control parameter (K), and the current value is the value of the bias current. The control parameter and the bias current are collectively referred to as control rigidity, which is common knowledge in the technical field. In practice, the driving command is also used to drive the magnetic bearing assembly PA13 through the power amplifiers PA12a and PA12b. In order to avoid the loss of control of the magnetic bearing assembly at high-frequency rotation speed, the control rigidity of the magnetic bearing assembly will be set as high as possible. Therefore, the position controller PA11 in the prior art will directly generate the control of the maximum value M1 that the magnetic bearing assembly PA13 can bear. Rigidity, as shown in the third figure.

However, if the control rigidity is too high, it is easy to make the magnetic bearing assembly PA13 unstable when the control is started, and then the magnetic bearing rotor PA131 floats away from the safety bearing PA133, and then touches or even hits the safety bearing PA133 due to overshoot, as shown in the fourth figure shown. Wherein, the fourth figure is a schematic representation of a rotor center position of the magnetic levitation rotor PA131 sensed by the sensing module PA134. For example, when the rotor center position is 0.4mm, it means that the magnetic levitation rotor PA131 is currently located at a balance center position between the safety bearings PA133, and 0.2mm and 0.6mm are the positions where the magnetic levitation rotor PA131 touches the safety bearing PA133. , when the rotor center position reaches 0.2mm or 0.6mm, it means that the magnetic levitation rotor PA131 touches or even hits the safety bearing PA133.

In addition, in practice, the position controller PA11 will also receive a position command and a position feedback value generated by the position feedback sensor PA14, which is common knowledge in the technical field, so no more details are given here.

In view of the fact that in the prior art, the value of the drive command is too high, that is, the control rigidity is too high, it is easy to cause the instability of the magnetic bearing assembly when the control is started and the derived problems of the magnetic bearing rotor hitting the safety bearing. One of the main objectives of the present invention is to provide an auxiliary control system and method for magnetic bearings to solve at least one problem in the prior art.

In order to solve the problems of the prior art, the necessary technical means adopted by the present invention are to provide a magnetic bearing auxiliary control system, which is applied to a magnetic bearing control system. The magnetic bearing control system includes a position controller and a magnetic bearing assembly. The position controller It is operated to generate a drive command including a parameter value and a current value to drive the magnetic bearing assembly. The magnetic bearing auxiliary control system includes a rule setting module, a control module, a timing module and a judgment module . The rule setting module is operated to set a control rule, the control rule has a start control parameter value, a steady state control parameter value, a start current parameter value, a steady state current parameter value, a first switching time interval and a The second switching interval. The electrical connection rule setting module of the control module is used to generate a start control command and a start current command according to the start control parameter value and the start current parameter value, and transmit the start control command and the start current command to the position controller, thereby Make the parameter value equal to the starting control parameter value and the current value equal to the starting current parameter value, and make the position controller drive the magnetic levitation rotor of the magnetic bearing assembly to float up and separate from the safety bearing of the magnetic bearing assembly.

The timing module is electrically connected to the control module, and is used to start timing when the control module transmits the start control command and the start current command to the position controller, and obtains a start time after the start of timing. The judging module is electrically connected to the timing module, the control module and the rule setting module, and is used to generate a first switching signal when it is judged that the starting time is greater than the first switching time interval, and use the control module to follow the control rule, Generate an increase control command and an increase current command, so as to increase the parameter value and current value; when it is judged that the starting time is greater than the second switching time interval, a second switching signal is generated, and the control module is used according to The steady-state control parameter value and the steady-state current parameter value generate a steady-state control command and a steady-state current command, so that the parameter value is equal to the steady-state control parameter value and the current value is equal to the steady-state current parameter value.

On the basis of the above-mentioned necessary technical means, an auxiliary technical means derived from the present invention is to make the rule setting module in the magnetic bearing auxiliary control system comprise a manual setting unit, and the manual setting unit is operated to set the start control parameter value , a steady-state control parameter value, a starting current parameter value, a steady-state current parameter value, a first switching time interval, and a second switching time interval.

On the basis of the above-mentioned necessary technical means, an auxiliary technical means derived from the present invention is to make the control module in the magnetic bearing auxiliary control system include a calculation unit, and the calculation unit uses the steady-state control parameter value and the start-up control parameter value The difference between the second switching interval and the first switching interval is divided by the difference between the second switching interval and the first switching interval to generate an increase control command, and the difference between the steady-state current parameter value and the starting current parameter value is divided by the second switching interval and the first switching interval A switching time difference is used to generate a command to increase the current.

On the basis of the above-mentioned necessary technical means, an auxiliary technical means derived from the present invention is to make the rule setting module in the magnetic bearing auxiliary control system include a receiving unit, a comparing unit and a first setting unit. The magnetic bearing control system further includes a sensing module, which is used to sense a rotor center position of the magnetic bearing rotor. The receiving unit is used for receiving the center position of the rotor. The comparing unit is electrically connected to the receiving unit for comparing the center position of the rotor with the balance center position of one of the safety bearings, and generates a balance signal when the center position of the rotor is equal to the balance center position. The first setting unit is electrically connected to the comparing unit, and is used for defining the starting time at that time as the first switching time interval when receiving the balance signal.

On the basis of the above-mentioned necessary technical means, an auxiliary technical means derived from the present invention is to make the rule setting module in the magnetic bearing auxiliary control system further include a second setting unit, the second setting unit is electrically connected to the first setting A unit for defining a second switching time interval by adding twice the current starting time to the first switching time interval.

In order to solve the problems of the prior art, the necessary technical means adopted by the present invention is to provide an additional magnetic bearing auxiliary control method, which is implemented by using the above magnetic bearing auxiliary control system, and includes the following steps: using the rule setting module to set the control Rules: use the control module to generate the start control command and start current command, so that the parameter value is equal to the start control parameter value and the current value is equal to the start current parameter value, and the position controller drives the magnetic levitation rotor to float up and break away from the safety bearing; Use the timing module to calculate the starting time; use the judging module to determine that the starting time is greater than the first switching time interval, and generate the first switching signal; use the control module to generate an increase control command and an increase current command, so as to increase the parameter value and the current value; when the judging module judges that the starting time is greater than the second switching time distance, a second switching signal is generated; the control module is used to generate a steady-state control command and a steady-state current command, so that the parameter value is equal to the steady-state control parameter value and make the current value equal to the steady state current parameter value.

On the basis of the above-mentioned necessary technical means, an auxiliary technical means derived from the present invention is to make the steps in the magnetic bearing auxiliary control method further include the following steps: use one of the manual setting units of the rule setting module to set the start control parameter value, Steady-state control parameter value, starting current parameter value, steady-state current parameter value, first switching interval and second switching interval.

On the basis of the above-mentioned necessary technical means, an auxiliary technical means derived from the present invention is to make the steps in the magnetic bearing auxiliary control method further include the following steps: using one of the calculation units of the control module, according to the steady-state control parameter value and The difference between the starting control parameter value is divided by the difference between the second switching time interval and the first switching time interval to generate an increase control command, and the difference between the steady-state current parameter value and the starting current parameter value is divided by the second switching time The difference between the time distance and the first switching time distance is used to generate a command to increase the current.

On the basis of the above-mentioned necessary technical means, an auxiliary technical means derived from the present invention is to make the magnetic bearing control system further include a sensing module, which is used to sense the rotor center position of the magnetic bearing rotor, The steps in the magnetic bearing auxiliary control method further include the following steps: using a receiving unit of the rule setting module to receive the center position of the rotor; using a rule setting module to compare the unit, when comparing the center position of the rotor is equal to the balance center position , to generate a balance signal; using one of the first setting units of the rule setting module, when receiving the balance signal, define the starting time at that time as the first switching time interval.

On the basis of the above-mentioned necessary technical means, an auxiliary technical means derived from the present invention is to make the steps in the magnetic bearing auxiliary control method further include the following steps: using the second setting unit of the rule setting module to set the first switching The time interval plus twice the current activation time defines the second switching interval.

Based on the above, the magnetic bearing auxiliary control system provided by the present invention uses a rule setting module, a control module, a timing module and a judgment module to assist in controlling the magnetic bearing control system to control the floating of the magnetic bearing rotor. Compared with the prior art, the present invention utilizes the control module to generate start-up control commands and start-up current commands according to the control rules, and generates a step-up control command and a step-up current command at the first switching interval, and at the second switching time interval Generate steady-state control commands and steady-state current commands to gradually control parameter values and current values. Therefore, the present invention can control the magnetic levitation rotor to float smoothly, and can also make the magnetic bearing assembly after gradually increasing the parameter values and current values. It will not run out of control at high-frequency rotation speeds, avoiding the instability of start-up control caused by excessive parameter values and current values in the previous technology, resulting in the magnetic levitation rotor oscillating contact or even touching the safety bearing. In addition, the rule setting module of the present invention can further use the receiving unit, the comparing unit, the first setting unit and the second setting unit to automatically define the first switching time interval and the second switching time interval.

The specific implementation manner of the present invention will be described in more detail below with reference to schematic diagrams. The advantages and features of the present invention will be more clear from the following description and claims. It should be noted that all the drawings are in very simplified form and use imprecise scales, which are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention.

Please refer to the fifth figure, the sixth figure and the tenth figure, wherein, the fifth figure is a block diagram showing the magnetic bearing auxiliary control system provided by the preferred embodiment of the present invention; the sixth figure is a schematic diagram showing the magnetic bearing assembly; And, the tenth figure is a flow chart showing the auxiliary control method of the magnetic bearing provided by the preferred embodiment of the present invention. As shown in the figure, a magnetic bearing auxiliary control system 1 is applied to a magnetic bearing control system 2 and includes a rule setting module 11 , a control module 12 , a timing module 13 and a judgment module 14 .

The magnetic bearing control system 2 includes a position controller 21 , a plurality of power amplifiers 22 a , 22 b , a magnetic bearing assembly 23 and a position feedback sensor 24 . The maglev bearing assembly 23 at least includes a maglev rotor 231 , a maglev stator 232 , a safety bearing 233 and a sensing module 234 . Wherein, the architecture of the magnetic bearing control system 2 is the same as that of the magnetic bearing control system PA1 in the prior art, so no more details are given here.

A magnetic bearing auxiliary control method is implemented by using the magnetic bearing auxiliary control system 1, and includes the following steps S101 to S111.

Step S101: Use the rule setting module to set control rules.

The rule setting module 11 is operated to set a control rule, wherein the control rule has a starting control parameter value, a steady state control parameter value, a starting current parameter value, a steady state current parameter value, a first switching time distance and a second switching time distance.

Step S102: Utilize the control module to generate the starting control command and the starting current command, and send them to the position controller so that the parameter value and the current value are equal to the starting control parameter value and the starting current parameter value respectively, and make the position controller drive the magnetic levitation accordingly The rotor floats up.

The control module 12 is an electrical connection rule setting module 11, which is used to generate a start control command and a start current command according to the start control parameter value and the start current parameter value, and transmit the start control command and the start current command to the position controller 21, so that the parameter value is equal to the start control parameter value and the current value is equal to the start current parameter value, so that the position controller 21 can drive a magnetic levitation rotor 231 of the magnetic bearing assembly 23 to float up and break away from a safety bearing of the magnetic bearing assembly 23 233.

Step S103: Use the timing module to time the time.

The timing module 13 is electrically connected to the control module 12, and is used to start timing when the control module 12 transmits the startup control instruction and the startup current instruction to the position controller 21, and obtains a startup time after the timing starts.

Step S104: Use the judging module to judge the starting time and the first switching time interval.

Step S105: Whether the startup time is greater than the first switching time interval.

If it is judged yes in step S105, go to step S106; and if it is judged no, repeat step S104.

Step S106: The judging module generates a first switching signal.

The judging module 14 is electrically connected to the timing module 13, the control module 12 and the rule setting module 11, and is used for generating a first switching signal when it is judged that the starting time is greater than the first switching time interval.

Step S107: Utilize the control module to generate an increase control command and an increase current command, so as to increase the parameter value and the current value.

Next, use the control module 12 to generate an increase control instruction and an increase current instruction according to the control rules, so as to increase the parameter value and current value in the driving command of the position controller 21 .

Step S108: Use the judging module to judge the starting time and the second switching time interval.

Step S109: Whether the startup time is greater than the second switching time interval.

If it is judged yes in step S109, go to step S110; and if it is judged no, repeat step S108.

Step S110: The judging module generates a second switching signal.

The judging module 14 further judges whether the starting time is greater than the second switching interval, and generates a second switching signal when the starting time is greater than the second switching interval.

Step S111 : Utilize the control module to generate a steady-state control command and a steady-state current command, so that the parameter value and the current value are respectively equal to the steady-state control parameter value and the steady-state current parameter value.

The control module 12 generates a steady-state control command and a steady-state current command according to the steady-state control parameter value and the steady-state current parameter value of the control rule, so that the parameter value and the current value are respectively equal to the steady-state control parameter value and the steady-state Current parameter value.

Next, please refer to the fifth figure to the ninth figure together. Among them, the seventh figure shows the schematic diagram of the drive command provided by the preferred embodiment of the present invention; the eighth figure shows the maglev provided by the preferred embodiment of the present invention. A schematic diagram of the bearing auxiliary control system for auxiliary control of the magnetic bearing assembly; and, Figure 9 is a schematic diagram showing the position of the center of the rotor for auxiliary control of the magnetic bearing assembly of the present invention. As shown in the figure, in this embodiment, the rule setting module 11 further includes a manual setting unit 111 , and the control module 12 further includes a calculation unit 121 .

The manual setting unit 111 is used for a user to manually set the starting control parameter value, the steady-state control parameter value, the starting current parameter value, the steady-state current parameter value, the first switching time interval T1 and the second switching time interval T2, so as to form control rules. Generally speaking, users can set the above values based on empirical rules, big data analysis, product specifications, etc.

The control module 12 will generate a start control command and a start current command according to the start control parameter value and the start current parameter value, and send them to the position controller 21, so that the parameter value is equal to the start control parameter value and the current value is equal to the start current parameter value . Referring to the seventh figure, the starting value M0 indicates that the parameter value and the current value are respectively equal to the starting control parameter value and the starting current parameter value.

At this time, the position controller 21 will drive and control the magnetic levitation rotor 231 to float up along a moving direction D1 and disengage from the safety bearing 233 , please refer to the sixth and eighth figures. In addition, referring to FIG. 9 , the position of the rotor center of the magnetic levitation rotor 231 sensed by the sensing module 234 will gradually rise. Compared with the prior art, please refer to the fourth figure, because the present invention uses smaller starting control parameter values and starting current parameter values to generate starting control commands and starting current commands, so that the rise of the rotor center position of the magnetic levitation rotor 231 is relatively gentle , is also relatively stable, and does not produce the oscillation situation as in the prior art. The central position of the rotor is indicated by a distance L between the central axis of the magnetic levitation rotor 231 and the sensing module 234 , but it is not limited thereto. The sensing module 234 can also sense a first gap distance between the boundary of the magnetic levitation rotor 231 and the sensing module 234, and match the radius of the magnetic levitation rotor 231, a second gap between the safety bearing 233 and the magnetic levitation rotor 231 Distance, etc., so as to sense parameters that can represent the position of the magnetic levitation rotor 231 .

When the judging module 14 judges that the starting time is longer than the first switching time interval T1, the first switching signal will be generated. At this time, the control module 12 generates an increase control instruction and an increase current instruction according to the control rule. In this embodiment, the calculation unit 121 can divide the difference between the steady-state control parameter value and the start-up control parameter value by the difference ΔT between the second switching time interval T2 and the first switching time interval T1 to generate an increase control command , and divide the difference between the steady-state current parameter value and the start-up current parameter value by the difference ΔT between the second switching time interval T2 and the first switching time interval T1 to generate an increase current command.

For example, in this embodiment, when the parameter value and the current value are the starting value M0, the starting value M0 is the starting control parameter value and the starting current parameter value; when the parameter value and the current value are the maximum value M1, the maximum The value M1 is the steady-state control parameter value and the steady-state current parameter value. Therefore, the calculation unit 121 can be regarded as dividing the difference ΔM between the maximum value M1 and the starting value M0 by the difference ΔT, so as to generate an increase control instruction and an increase current instruction respectively.

Therefore, increasing the control command and increasing the current command will increase the parameter value and current value. As shown in the seventh figure, at the first time point t1 represented by the first switching time interval T1 and the second switching time interval T2 Between the represented second time point t2, the parameter value and the current value are operatively increased step by step.

And when the judging module 14 judges that the starting time is longer than the second switching time interval T2, a second switching signal will be generated. At this time, the control module 12 generates a steady-state control command and a steady-state current command according to the steady-state control parameter value and the steady-state current parameter value, so that the parameter value is equal to the steady-state control parameter value and the current value is equal to the steady-state The current parameter value is the maximum value M1 in this embodiment. It should be noted that the maximum value M1 in this embodiment is the maximum value M1 in the prior art.

The third and seventh figures can be compared together. Compared with the prior art, which directly uses the maximum value M1 as the driving command in order to improve the rigidity, the present invention uses the first switching time distance T1 and the second switching time distance T2 to convert the driving command The parameter value and current value gradually increase from the start-up value M0 (start-up control parameter value and start-up current parameter value) to the maximum value M1 (steady-state control parameter value and steady-state current parameter value). Next, compare the fourth figure and the ninth figure together. Through the above-mentioned gradual control of the parameter value and current value, the rotor center position of the present invention rises relatively gently and steadily, and there is no vibration in the prior art. There will be a problem that the magnetic levitation rotor 231 contacts and hits the safety bearing 233 .

In addition to the manual setting unit 111 , in this embodiment, the rule setting module 11 may also include a receiving unit 112 , a comparing unit 113 and a first setting unit 114 .

The receiving unit 112 is used for receiving the rotor center position sensed by the sensing module 234 . The comparing unit 113 is electrically connected to the receiving unit 112 for comparing the rotor center position with a balance center position of the safety bearing 233 , and generates a balance signal when the rotor center position is equal to the balance center position. The first setting unit 114 is electrically connected to the comparing unit 113, and is used for defining the current starting time as the first switching time interval when receiving the balance signal.

For example, when the comparing unit 113 confirms that the center position of the rotor is 0.4 mm, it will generate a balance signal, and the first setting unit 114 will define the starting time at this time as the first switching time interval T1. Therefore, after the first switching time interval T1 is defined, the start-up time will be longer than the first switching time interval T1, and the control module 12 will generate an increase control instruction and an increase current instruction.

In addition, the rule setting module 11 further includes a second setting unit 115, the second setting unit 115 is electrically connected to the first setting unit 114, and is used to define The second switching time interval T2. The second switching time T2 can also be regarded as three times the first switching time T1. When the starting time is greater than the second switching time interval T2, the control module 12 will generate a steady-state control command and a steady-state current command.

The purpose of using the first switching time interval T1 plus twice the current starting time is that the first switching time interval T1 is half the movable distance (the distance between the safety bearings 233) that the magnetic levitation rotor 231 moves from the safety bearing 233 Therefore, in the time interval between increasing the parameter value and the current value (which can be regarded as the interval where the difference ∆T is located), it is recommended to be longer than the first switching time interval T1, or even two times the first switching time interval T1. times, so as to avoid the instability and oscillation of the whole system.

To sum up, the magnetic bearing auxiliary control system provided by the present invention uses the rule setting module, control module, timing module and judgment module to assist in controlling the magnetic bearing control system to control the floating of the magnetic bearing rotor. Compared with the prior art, the present invention utilizes the control module to generate start-up control commands and start-up current commands according to the control rules, and generates a step-up control command and a step-up current command at the first switching interval, and at the second switching time interval Generate steady-state control commands and steady-state current commands to gradually control parameter values and current values. Therefore, the present invention can control the magnetic levitation rotor to float smoothly, and can also make the magnetic bearing assembly after gradually increasing the parameter values and current values. It will not run out of control at high-frequency rotation speeds, avoiding the instability of start-up control caused by excessive parameter values and current values in the previous technology, resulting in the magnetic levitation rotor oscillating contact or even touching the safety bearing. In addition, the rule setting module of the present invention can further use the receiving unit, the comparing unit, the first setting unit and the second setting unit to automatically define the first switching time interval and the second switching time interval.

Through the above detailed description of the preferred embodiments, it is hoped that the characteristics and spirit of the present invention can be described more clearly, and the scope of the present invention is not limited by the preferred embodiments disclosed above. On the contrary, the intention is to cover various changes and equivalent arrangements within the scope of the claimed patent scope of the present invention.

PA1,2: Magnetic bearing control system PA11,21: position controller PA12a, PA12b, 22a, 22b: power amplifier PA13,23: Magnetic Bearing Assembly PA131,231: Maglev rotor PA132,232: Maglev Stator PA133,233: Safety Bearings PA134,234: Sensing module PA14,24: position feedback sensor 1: Magnetic bearing auxiliary control system 11: Rule setting module 111: Manual setting unit 112: Receiving unit 113: Comparison unit 114: The first setting unit 115: the second setting unit 12: Control module 121: Calculation unit 13: Timing module 14: Judgment module D1: moving direction L: distance M0: start value M1: maximum value T1: first switching time interval t1: the first time point T2: second switching time interval t2: second time point ∆M,∆T: difference S101~S111: steps

The first figure is a schematic diagram showing a prior art magnetic bearing control system; The second figure is a schematic diagram showing a magnetic bearing assembly of the prior art; The third figure is a schematic diagram showing the drive command of the prior art; The fourth figure is a schematic diagram showing the position of the rotor center of the magnetic bearing assembly of the prior art; The fifth figure is a block diagram showing the magnetic bearing auxiliary control system provided by the preferred embodiment of the present invention; Figure 6 is a schematic diagram showing the magnetic bearing assembly; The seventh figure is a schematic diagram showing the driving commands provided by the preferred embodiment of the present invention; The eighth figure is a schematic diagram showing the auxiliary control system of the magnetic bearing auxiliary control system provided by the preferred embodiment of the present invention to assist the control of the magnetic bearing assembly; Figure 9 is a schematic diagram showing the position of the rotor center of the auxiliary control magnetic bearing assembly of the present invention; and Figure 10 is a flow chart showing the auxiliary control method for the magnetic bearing provided by the preferred embodiment of the present invention.

1: Magnetic bearing auxiliary control system

11: Rule setting module

111: Manual setting unit

112: Receiving unit

113: Comparison unit

114: The first setting unit

115: the second setting unit

12: Control module

121: Calculation unit

13: Timing module

14: Judgment module

2: Magnetic bearing control system

21: Position controller

22a, 22b: power amplifier

23: Magnetic bearing assembly

234:Sensing module

24: Position feedback sensor

Claims (10)

A magnetic bearing auxiliary control system is applied to a magnetic bearing control system, the magnetic bearing control system includes a position controller and a magnetic bearing assembly, the position controller is operated to generate a parameter value and a current value The drive command to drive the magnetic bearing assembly, the magnetic bearing auxiliary control system includes: A rule setting module is operated to set a control rule, the control rule has a starting control parameter value, a steady state control parameter value, a starting current parameter value, a steady state current parameter value, a first a switching time interval and a second switching time interval; A control module, which is electrically connected to the rule setting module, is used to generate a start control command and a start current command according to the start control parameter value and the start current parameter value, and combine the start control command and the start current The instruction is sent to the position controller, so that the parameter value is equal to the start control parameter value and the current value is equal to the start current parameter value, and the position controller drives a magnetic levitation rotor of the magnetic bearing assembly to float up and disengage one of the safety bearings of the magnetic bearing assembly; A timing module, which is electrically connected to the control module, is used to start timing when the control module transmits the starting control command and the starting current command to the position controller, and obtains the time experienced after starting timing a start time; and A judging module, which is electrically connected to the timing module, the control module and the rule setting module, is used to generate a first switching signal when it is judged that the starting time is greater than the first switching time interval, and Utilize the control module to generate an increase control instruction and an increase current instruction according to the control rule, so as to increase the parameter value and the current value; when it is judged that the starting time is greater than the second switching time interval , generate a second switching signal, and use the control module to generate a steady-state control command and a steady-state current command according to the steady-state control parameter value and the steady-state current parameter value, so that the parameter value is equal to the steady-state current parameter value State control parameter value and make the current value equal to the steady state current parameter value. The magnetic bearing auxiliary control system as described in Claim 1, wherein, the rule setting module includes a manual setting unit, and the manual setting unit is operated to set the starting control parameter value, the steady state control parameter value, the The starting current parameter value, the steady state current parameter value, the first switching time interval and the second switching time interval. The magnetic bearing auxiliary control system as described in claim 2, wherein the control module includes a calculation unit, and the calculation unit uses the difference between the steady-state control parameter value and the start-up control parameter value divided by the second The difference between the switching time interval and the first switching time interval is used to generate the step-up control command, and the difference between the steady-state current parameter value and the starting current parameter value is divided by the second switching time interval and the first switching time interval. The difference between the switching time intervals is used to generate the command to increase the current. The magnetic bearing auxiliary control system as described in Claim 1, wherein the magnetic bearing control system further includes a sensing module, the sensing module is used to sense a rotor center position of the magnetic bearing rotor, the rule The configuration module contains: a receiving unit for receiving the rotor center position; a comparison unit, electrically connected to the receiving unit, for comparing the rotor center position with a balance center position of the safety bearing, and generating a balance signal when the rotor center position is equal to the balance center position; and A first setting unit is electrically connected to the comparison unit, and is used for defining the current starting time as the first switching time interval when receiving the balance signal. The magnetic bearing auxiliary control system as described in claim 4, wherein the rule setting module further includes a second setting unit, the second setting unit is electrically connected to the first setting unit, and is used to utilize the first switching The time interval plus twice the current activation time defines the second switching interval. A magnetic bearing auxiliary control method is implemented using the magnetic bearing auxiliary control system described in claim 1, and includes the following steps: (a) use the rule setting module to set the control rule; (b) Utilize the control module to generate the start control command and the start current command, so as to make the parameter value equal to the start control parameter value and the current value equal to the start current parameter value, and make the position controller according to Drive the maglev rotor to float up and break away from the safety bearing; (c) use the timing module to keep time; (d) when the judging module is used to judge that the starting time is greater than the first switching time interval, the first switching signal is generated; (e) using the control module to generate the increase control command and the increase current command, so as to increase the parameter value and the current value; (f) when the judging module is used to judge that the starting time is greater than the second switching time interval, the second switching signal is generated; (g) Using the control module to generate the steady-state control command and the steady-state current command, so that the parameter value is equal to the steady-state control parameter value and the current value is equal to the steady-state current parameter value. The magnetic bearing auxiliary control method as described in Claim 6, wherein the step (a) further includes the following steps: (a1) Use one of the manual setting units of the rule setting module to set the starting control parameter value, the steady state control parameter value, the starting current parameter value, the steady state current parameter value, the first switching time interval and the second switching time interval Two switching interval. The magnetic bearing auxiliary control method as described in claim 7, wherein the step (e) further includes the following steps: (e1) using one of the calculation units of the control module to generate the adjustment according to the difference between the steady-state control parameter value and the start-up control parameter value divided by the difference between the second switching time interval and the first switching time interval an increase control command, and divide the difference between the steady-state current parameter value and the starting current parameter value by the difference between the second switching time interval and the first switching time interval to generate the current increase command. The magnetic bearing auxiliary control method as described in claim 6, wherein the magnetic bearing control system further includes a sensing module, the sensing module is used to sense a rotor center position of the magnetic bearing rotor, the step (a) further includes the following steps: (a1) Use one of the receiving units of the rule setting module to receive the rotor center position; (a2) A comparison unit of the rule setting module is used to generate a balance signal when the rotor center position is equal to the balance center position; (a3) Using one of the first setting units of the rule setting module to define the start-up time as the first switching time interval when receiving the balance signal. The magnetic bearing auxiliary control method as described in Claim 9, wherein the step (a) further includes the following steps: (a4) Using a second setting unit of the rule setting module, adding twice the current starting time to the first switching time interval to define the second switching time interval.

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