CN119652207A - A spontaneous electromagnetic suspension blower system and control method thereof - Google Patents
A spontaneous electromagnetic suspension blower system and control method thereof Download PDFInfo
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- CN119652207A CN119652207A CN202510174698.7A CN202510174698A CN119652207A CN 119652207 A CN119652207 A CN 119652207A CN 202510174698 A CN202510174698 A CN 202510174698A CN 119652207 A CN119652207 A CN 119652207A
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Abstract
The invention relates to the technical field of magnetic suspension blowers, in particular to a spontaneous electromagnetic suspension blower system and a control method thereof, which are used for responding to a starting instruction to drive suspension operation of a magnetic suspension bearing so as to support a main shaft of a motor to suspend, obtaining a rated rotating speed of the magnetic suspension blower, cutting off power supply of an external power supply if the magnetic suspension blower reaches a rated working condition point under the condition that the real-time rotating speed of the magnetic suspension blower reaches the rated rotating speed and operates normally, obtaining working voltage, utilizing the motor to perform spontaneous power supply to a rotor part of the motor when the working voltage shows a descending trend, judging whether the rotor part stops completely, giving out fault alarm if the rotor part stops completely, and waiting for the rotor rotating speed to descend to a preset safe speed if the rotor part stops descending to descend the main shaft. Under the condition of unexpected power failure, the motor rotates by virtue of inertia and acts as a generator to supply the magnetic suspension bearing in a short time, so that the motor main shaft can fall down the main shaft after the rotating speed of the motor main shaft is reduced below a safe rotating speed, and the magnetic suspension bearing and the main shaft are protected.
Description
Technical Field
The disclosure relates to the technical field of magnetic suspension blowers, in particular to a spontaneous electromagnetic suspension blower system and a control method thereof.
Background
When the magnetic suspension blower is in unexpected power failure (such as sudden tripping of a power grid), if the magnetic suspension bearing and a controller thereof are not continuously powered, a rotor with the rotating speed exceeding 30000rpm can lose control. Due to gravity, inertia and high-speed rotation, the rotor may fall directly onto the protection bearing, resulting in damage to the protection bearing and the spindle.
To solve this problem, a high-power uninterruptible power supply (Uninterruptible Power Supply, UPS) is used to supply power to the magnetic bearing and the controller uninterruptedly. However, the UPS has the defects of high cost, large occupied space and no external power supply condition, and the UPS is required to supply power for a weak current control system and a magnetic suspension bearing controller. With the increase of the service time, the service life and the storage capacity of the battery in the UPS can be gradually reduced, and the UPS can not work normally when the power grid is powered off, so that the whole weak current system cannot work normally. In this case, the fan may not work properly, and in severe cases, may even cause irreparable damage to the mechanical parts.
Disclosure of Invention
The present disclosure provides a spontaneous electromagnetic levitation blower system and a control method thereof for solving the drawbacks of the conventional UPS method, thereby avoiding damage to the blower and the bearings by maintaining stable operation of the magnetic levitation bearing and the weak current system.
The self-generating electromagnetic levitation blower system comprises a controller and a magnetic suspension bearing, wherein the controller is electrically connected with an external power supply, the controller is electrically connected with a frequency converter, the frequency converter is electrically connected with a motor, the magnetic suspension bearing is positioned at two sides of the motor, the motor is electrically connected with an isolated DC-DC power supply, a first isolating switch is connected between the frequency converter and the isolated DC-DC power supply, and a second isolating switch is electrically connected between the external power supply and the magnetic suspension bearing;
The frequency converter is used for adjusting the input voltage and frequency of the motor under the control of the controller so as to adjust the running speed of the motor;
the motor is used for generating mechanical energy through rotation under the control of the controller so as to drive the levitation operation of the magnetic suspension bearing, and converting part of the mechanical energy into electric energy under the control of the controller;
The magnetic suspension bearing is used for supporting a rotor part of the motor under the control of the controller;
the isolated DC-DC power supply is used for converting the electric energy generated by the magnetic suspension bearing to obtain direct-current voltage;
the first isolating switch is used for providing electric isolation between the motor and the frequency converter;
the second isolating switch is used for controlling the connection and disconnection between the external power supply and the frequency converter.
In an exemplary embodiment, the sensor assembly is connected with the controller, and comprises a temperature sensor, a pressure sensor, a speed sensor, a displacement sensor, a current sensor and a voltage sensor;
the temperature sensor is used for monitoring the real-time temperatures of the motor, the magnetic suspension bearing and the frequency converter;
The pressure sensor is used for monitoring system pressure and airflow pressure;
The speed sensor is used for monitoring the real-time rotating speed of the motor;
The displacement sensor is used for monitoring the position change of the magnetic suspension bearing;
the current sensor is used for monitoring a real-time current value;
the voltage sensor is used for monitoring the real-time voltage value.
In an exemplary embodiment, the controller further comprises a pressure relief valve connected with the controller;
The pressure release valve is used for adjusting the opening and closing degree under the control of the controller when the system pressure exceeds a preset system pressure value and/or the air flow pressure exceeds a preset air flow pressure value so as to adjust the system pressure and/or the air flow pressure.
In an exemplary embodiment, the magnetic suspension device further comprises a magnetic bearing controller connected through the second isolating switch, wherein the magnetic bearing controller is connected with the magnetic suspension bearing;
The magnetic bearing controller is used for adjusting the magnetic force of the magnetic bearing according to the position change of the magnetic bearing.
In an exemplary embodiment, the touch screen is further connected with the external power supply and the controller, respectively.
In a second aspect, the present disclosure provides a control method of a spontaneous electromagnetic levitation blower system, applied to the spontaneous electromagnetic levitation blower system as in the first aspect, the method comprising:
responding to a starting instruction, driving the levitation operation of the magnetic levitation bearing to levitate a main shaft of the supporting motor;
Acquiring the rated rotation speed of the magnetic suspension blower;
Under the condition that the real-time rotating speed of the magnetic suspension blower reaches the rated rotating speed and runs normally, if the magnetic suspension blower reaches the rated working point, the power supply of an external power supply is cut off;
acquiring working voltage, and when the working voltage shows a descending trend, utilizing the motor to perform self-power generation to supply to a rotor part of the motor;
Judging whether the rotor part is completely stopped, if so, giving out fault alarm, otherwise, waiting for the rotor rotating speed to be reduced to a preset safe speed, and then falling down the main shaft.
In an exemplary embodiment, after responding to the start instruction, further comprising:
checking whether the sensor assembly is in a normal running state or not, if not, sending out the fault alarm;
before obtaining the rated rotation speed of the magnetic suspension blower, the magnetic suspension blower further comprises:
and detecting the components of the spontaneous electromagnetic suspension blower system according to a preset detection flow.
In an exemplary embodiment, detecting the components of the autonomous electromagnetic levitation blower system according to a predetermined detection procedure includes:
detecting whether the current signal is stable or not, if not, sending out the fault alarm;
detecting whether the pressure release valve can adjust the opening and closing degree based on the adjusting instruction of the controller, if not, sending out the fault alarm;
Detecting whether the frequency converter can be started based on the starting instruction of the controller, if not, sending out the fault alarm;
And under the condition that the real-time rotating speed of the magnetic suspension blower reaches the rated rotating speed and runs normally, if the magnetic suspension blower reaches the rated working point, before cutting off the power supply of the external power supply, the magnetic suspension blower further comprises:
And closing the pressure relief valve, detecting whether the system pressure and/or the airflow pressure are/is in a preset normal interval, and if not, sending out the fault alarm.
In a third aspect, the present disclosure provides a storage medium having stored thereon a computer program which, when executed by a processor, performs the steps in the method as provided in the second aspect above.
In a fourth aspect, the present disclosure provides a computer program product comprising a computer program which, when executed by a processor, performs the steps in the method as provided in the second aspect above.
From the above technical solution, the present disclosure has the following advantages:
The invention provides a self-electromagnetic levitation blower system and a control method thereof, wherein the self-electromagnetic levitation blower system comprises a controller and a magnetic levitation bearing, the controller is electrically connected with an external power supply, the frequency converter is electrically connected with a motor, the magnetic levitation bearing is positioned at two sides of the motor, the motor is electrically connected with an isolated DC-DC power supply, a first isolating switch is connected between the frequency converter and the isolated DC-DC power supply, a second isolating switch is electrically connected between the external power supply and the magnetic levitation bearing, the frequency converter is used for adjusting the input voltage and frequency of the motor under the control of the controller so as to adjust the running speed of the motor, the motor is used for generating mechanical energy through rotation under the control of the controller so as to drive levitation operation of the magnetic levitation bearing, and under the control of the controller, the bearing is used for converting part of the mechanical energy into electric energy, supporting a rotor part of the motor under the control of the controller, the isolated DC-DC power supply is used for switching off the electric energy generated by the isolated DC-DC power supply, and the frequency converter is used for switching off the electric energy generated by the isolated DC-DC power supply and the isolated DC power supply. Under the condition of unexpected power failure, the motor rotates by virtue of inertia and acts as a generator in a short time to supply the magnetic suspension bearing, so that the magnetic suspension bearing and the main shaft can be protected by falling down the main shaft after the rotating speed of the main shaft of the motor is reduced below a safe rotating speed.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.
Fig. 1 exemplarily illustrates a schematic composition diagram of a spontaneous electromagnetic levitation blower system provided in a first embodiment of the present disclosure;
fig. 2 schematically illustrates a flow chart of steps of a control method of the spontaneous electromagnetic levitation blower system provided in the second embodiment of the present disclosure.
Detailed Description
The embodiment of the disclosure provides a spontaneous electromagnetic suspension blower system and a control method thereof, which are used for solving the defects of the traditional UPS method, and the damage to a blower and a bearing is avoided by keeping the stable operation of a magnetic suspension bearing and a weak current system.
In order to make the objects, features and advantages of the present invention more comprehensible, the technical solutions in the embodiments of the present invention are described in detail below with reference to the accompanying drawings, and it is apparent that the embodiments described below are only some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, fig. 1 is a schematic diagram illustrating a spontaneous electromagnetic levitation blower system according to a first embodiment of the present disclosure, the system includes:
The magnetic suspension device comprises a controller 102 and a magnetic suspension bearing 110 which are electrically connected with an external power supply 101, wherein the controller 102 is electrically connected with a frequency converter 104, the frequency converter 104 is electrically connected with a motor 109, the magnetic suspension bearing 110 is positioned at two sides of the motor 109, the motor 109 is electrically connected with an isolated DC-DC power supply 112, a first isolating switch 108 is connected between the frequency converter 104 and the isolated DC-DC power supply 112, and a second isolating switch 111 is electrically connected between the external power supply 101 and the magnetic suspension bearing 110;
the frequency converter 104 is configured to adjust an input voltage and a frequency of the motor 109 under the control of the controller 102, so as to adjust an operation speed of the motor 109;
the motor 109 is configured to generate mechanical energy by rotation under the control of the controller 102 to drive the levitation operation of the magnetic bearing 110, and to convert a part of the mechanical energy into electrical energy under the control of the controller 102;
the magnetic suspension bearing 110 is configured to support a rotor portion of the motor 109 under the control of the controller 102;
The isolated DC-DC power supply 112 is configured to convert the electric energy generated by the magnetic bearing 110 to a DC voltage;
The first isolating switch 108 is configured to provide electrical isolation between the motor 109 and the frequency converter 104;
the second isolating switch 111 is configured to control the connection and disconnection between the external power source 101 and the frequency converter 104.
In the embodiment of the disclosure, when the spontaneous electromagnetic suspension blower system works normally, the external power supply 101 is rectified through a silicon controlled rectifier and then supplied to an inverter to drive the permanent magnet motor to rotate at a high speed on one hand, and supplied to a DC-DC power supply to be converted on the other hand, and then supplied to the controller 102 for use. Once the external power supply 101 is disconnected, the controller 102 detects that the working voltage of the dc bus of the frequency converter 104 drops, the motor 109 enters a self-generating mode to convert part of mechanical energy into electric energy to supply power to the dc bus, and at this time, the working voltage of the dc bus quickly rises after a short drop and is stabilized at the original working voltage, and after the rotor rotating at a high speed drops to a preset safe speed, the spindle is dropped and the machine is stopped.
Specifically, during operation of the motor 109, the controller 102 needs to adjust the input voltage and frequency of the motor 109 according to the rated load electromotive force to ensure that the motor 109 operates in an optimal state. Wherein, the calculation expression of rated load electromotive force is:
;
Wherein, For the rated load electromotive force,In order to be a frequency of the light,For the actual number of turns per phase in the motor parameters,As a winding factor in the parameters of the motor,Is the magnetic flux of the permanent magnet,Is the magnetic field waveform coefficient in the motor parameters.
In the self-generating mode, the self-generating principle of the magnetic bearing 110 involves an electromagnetic induction phenomenon, in which when a conductor moves in a magnetic field, magnetic lines of force are cut,
According to faraday's law of electromagnetic induction, induced electromotive force is generated at both ends of a conductor. The expression of Faraday's law of electromagnetic induction is:
;
Wherein, Is an electromotive force, and is used for generating a voltage,For the number of turns of the coil,As a result of the magnetic flux,Is time.
Meanwhile, in the magnetic suspension bearing 110, when the rotor rotates in a magnetic field generated by the stator coil, a conductor inside the rotor (e.g., a rotor material of the motor) cuts the magnetic lines of force due to a relative motion between the rotor and the magnetic field, thereby inducing a current inside the rotor. These induced currents generate a magnetic field inside the rotor that interacts with the magnetic field generated by the stator coils. According to lenz's law, these interacting magnetic fields create a force in the direction of the force that resists the movement of the rotor relative to the stator magnetic field. This force, commonly referred to as detent force, acts to stabilize the rotor in the magnetic bearing 110, preventing the rotor from being off-center due to inertia caused by rotation. In the design of the magnetic bearing 110, the levitation state of the rotor is maintained by precisely controlling the magnitude of the current, which means that the induced current inside the rotor needs to be properly managed so as to be automatically adjusted when the rotor deviates from the equilibrium position, and the levitation state is restored.
It should be noted that the rotation speed and performance of the motor 109 are affected by the pole pair number, and the pole pair number calculation expression in the embodiment of the present disclosure is:
;
Wherein, In the form of an polar pair number,In order to be a frequency of the light,Is the rotational speed in the motor parameters.
In an exemplary embodiment, the sensor assembly 106 is coupled to the controller 102, the sensor assembly 106 including a temperature sensor, a pressure sensor, a speed sensor, a displacement sensor, a current sensor, and a voltage sensor;
the temperature sensor is used for monitoring the real-time temperatures of the motor, the magnetic suspension bearing and the frequency converter;
The pressure sensor is used for monitoring system pressure and airflow pressure;
The speed sensor is used for monitoring the real-time rotating speed of the motor;
The displacement sensor is used for monitoring the position change of the magnetic suspension bearing;
the current sensor is used for monitoring a real-time current value;
the voltage sensor is used for monitoring the real-time voltage value.
In the embodiment of the disclosure, the real-time operation state of the spontaneous electromagnetic suspension blower system is acquired through a temperature sensor, a pressure sensor, a speed sensor, a displacement sensor, a current sensor and a voltage sensor respectively.
In an exemplary embodiment, the system further comprises a pressure relief valve 107 connected with the controller 102;
The pressure release valve 107 is configured to adjust the opening and closing degree under the control of the controller 102 to adjust the system pressure and/or the airflow pressure when the system pressure exceeds a preset system pressure value and/or the airflow pressure exceeds a preset airflow pressure value.
In the embodiment of the disclosure, the blower can reach the rated working point by adjusting the opening and closing degree of the pressure relief valve 107 and matching with the rotation speed of the drill.
In an exemplary embodiment, the magnetic bearing device further comprises a magnetic bearing controller 105 connected through the second isolating switch 111, wherein the magnetic bearing controller 105 is connected with the magnetic suspension bearing 110;
The magnetic bearing controller 105 is configured to adjust a magnetic force of the magnetic bearing 110 according to the position change of the magnetic bearing 110.
In the embodiment of the present disclosure, in order to ensure accurate control of the magnetic bearing 110, it is necessary to acquire the position change of the magnetic bearing 110 in real time through the magnetic bearing controller 105, thereby adjusting the magnetic force. The magnetic force can be calculated by the current in the coil and the magnetic field around the coil, and in general, the magnetic force is calculated by the following expression:
;
Wherein, Is a magnetic force, and is a magnetic force,Is a constant of proportionality and is used for the control of the temperature,In the event of a current flow,For the initial air gap distance,Is the air gap variation.
In addition, in the magnetic suspension bearing 110, the rotor is driven to float by the lorentz force generated in the magnetic field so as not to directly contact the bearing, thereby reducing friction. Wherein, the calculation expression of the Lorentz force is:
;
Wherein, In order to be a charge quantity,In order to be a velocity of the electric charge,In order for the magnetic field to be of a strength,Is the lorentz force.
In addition, in the magnetic bearing 110, the magnetic resistance affects the magnitude and distribution of electromagnetic force, and precise control is required to ensure stable levitation of the rotor. In motor design, reluctance affects the distribution of magnetic flux, thereby affecting the performance of the motor 109. Wherein, the calculation expression of the magnetic resistance is:
;
Wherein, In order to be magneto-resistive,For the length of the magnetic circuit,In order to be of magnetic permeability,Is the magnetic circuit cross-sectional area.
In an exemplary embodiment, a touch screen 103 is further included that is respectively connected to the external power source 101 and the controller 102.
In the disclosed embodiment, the touch screen 103 is used as a man-machine interaction interface, and can display the state information of the spontaneous electromagnetic suspension blower system, and after intuitively obtaining the state information of the system, a user performs control operation and parameter adjustment at necessary times, so as to adjust the running state of the system.
The self-generating electromagnetic levitation blower system comprises a controller 102 and a magnetic levitation bearing 110, wherein the controller 102 is electrically connected with an external power supply 101, the controller 102 is electrically connected with a frequency converter 104, the frequency converter 104 is electrically connected with a motor 109, the magnetic levitation bearing 110 is positioned on two sides of the motor 109, the motor 109 is electrically connected with an isolated DC-DC power supply 112, a first isolating switch 108 is connected between the frequency converter 104 and the isolated DC-DC power supply 112, a second isolating switch 111 is electrically connected between the external power supply 101 and the magnetic levitation bearing 110, the frequency converter 104 is used for adjusting the input voltage and frequency of the motor 109 under the control of the controller 102 so as to adjust the running speed of the motor 109, the motor 109 is used for generating mechanical energy through rotation under the control of the controller 102 so as to drive the levitation operation of the bearing 110, a part of the mechanical energy is converted into electric energy under the control of the controller 102, a second isolating switch 111 is connected between the controller 104 and the DC-DC power supply 102 and the isolated DC power supply 108, and the second isolating switch 108 is used for disconnecting the electric energy from the DC-DC power supply 102, and the isolated DC power supply 108 is used for switching off the electric energy from the DC power supply 104. In the case of unexpected power failure, the motor 109 rotates by inertia to act as a generator in a short time to supply the magnetic suspension bearing 110, so that the magnetic suspension bearing 110 and the main shaft can be protected by dropping the main shaft after the main shaft rotation speed of the motor 109 falls below a safe rotation speed.
Referring to fig. 2, fig. 2 is a flowchart illustrating steps for controlling a spontaneous electromagnetic levitation blower system according to the second embodiment of the present disclosure, which is applied to the spontaneous electromagnetic levitation blower system according to the first embodiment, and includes:
S201, responding to a starting instruction, checking whether the sensor assembly is in a normal running state or not, and if not, sending out the fault alarm;
in the disclosed embodiments, after the external power source and the controller are started, the controller may enter a self-test mode in response to a start command to detect whether each sensor assembly in the autonomous electromagnetic levitation blower system is capable of operating normally.
S202, driving the levitation operation of the magnetic levitation bearing to levitate a main shaft of the supporting motor;
In the embodiment of the disclosure, after the self-inspection is completed, the controller drives the suspension of the magnetic suspension bearing, so that the main shaft of the supporting motor is suspended.
S203, detecting components of the spontaneous electromagnetic suspension blower system according to a preset detection flow;
In the embodiment of the disclosure, before triggering the self-generating mode of the self-generating electromagnetic levitation blower system, components of the system need to be detected according to a preset detection flow.
In an exemplary embodiment, detecting the components of the autonomous electromagnetic levitation blower system according to a predetermined detection procedure includes:
detecting whether the current signal is stable or not, if not, sending out the fault alarm;
detecting whether the pressure release valve can adjust the opening and closing degree based on the adjusting instruction of the controller, if not, sending out the fault alarm;
detecting whether the frequency converter can be started based on the starting instruction of the controller, and if not, sending out the fault alarm.
In the embodiment of the disclosure, the preset detection flow comprises current signal detection, pressure relief valve detection and frequency converter detection.
In a specific implementation, an operator can check whether a current signal is stable or not through a touch screen or an upper computer, the abnormal current possibly means that a fault or a load abnormality exists in a motor, a fault alarm needs to be sent out, under the condition that the current is stable and the current value is in a normal range, a pressure relief valve is opened and closed for a plurality of times to check whether the valve works normally, if the pressure relief valve cannot normally respond to an adjusting instruction of a controller, the system can not effectively protect equipment and needs to send out the fault alarm when the pressure is abnormal, under the condition that the pressure relief valve is normal, a frequency converter is started and whether the frequency converter works normally is checked, if the frequency converter cannot be started normally, the motor cannot obtain correct power control, the system cannot operate normally, and the fault alarm needs to be sent out.
S204, obtaining the rated rotation speed of the magnetic suspension blower;
In the disclosed embodiment, the rated rotational speed set by the user is received while ensuring that all of the spontaneous electromagnetic levitation blower system is normal.
S205, closing the pressure relief valve, and detecting whether the system pressure and/or the air flow pressure are in a preset normal interval or not;
in the disclosed embodiments, the system pressure and airflow pressure must be ensured to be within safe limits before the system reaches the rated operating point and is ready to shut off external power. If the pressure is too high or too low, the device may not operate safely. After the pressure relief valve is closed, the system pressure and the airflow pressure are monitored through the sensor, so that the parameters are ensured to be in a normal interval, and equipment damage or performance reduction caused by pressure abnormality in the self-generating process is avoided.
S206, if the real-time rotating speed of the magnetic suspension blower reaches the rated rotating speed and runs normally, cutting off the power supply of an external power supply;
In the disclosed embodiment, the rated rotational speed is a necessary condition to achieve the rated operating condition. In a spontaneous electromagnetic levitation blower system, the rotational speed of the motor directly affects the gas flow rate and pressure, so to reach rated operating points (e.g., rated flow and pressure), the motor must operate at rated rotational speed.
S207, acquiring working voltage, and when the working voltage shows a descending trend, utilizing the motor to perform self-power generation to supply to a rotor part of the motor;
In the embodiment of the disclosure, once the controller detects that the working voltage of the dc bus of the frequency converter shows a decreasing trend, the controller triggers a self-generating mode of the motor, converts part of mechanical energy into electric energy to supply power to the dc bus, and at this time, the working voltage of the dc bus rapidly rises after a short time and is stabilized at the working voltage within a normal range.
S208, judging whether the rotor part is completely stopped, if so, giving out a fault alarm, and if not, waiting for the rotor rotating speed to be reduced to a preset safe speed, and then falling down the main shaft.
In the embodiment of the disclosure, after the rotating speed of the rotor rotating at a high speed is reduced to a preset safe speed, the main shaft is dropped, and the shutdown is completed. In addition, in the method of the embodiment of the disclosure, any fault alarm triggered by an abnormality displays fault points on the touch screen and the upper computer, and meanwhile, the blower enters a shutdown process.
The embodiment of the disclosure provides a control method of a spontaneous electromagnetic levitation blower system, which comprises the steps of responding to a starting instruction, driving levitation operation of a magnetic levitation bearing to support a main shaft of a motor to levitate, obtaining a rated rotating speed of the magnetic levitation blower, cutting off power supply of an external power supply if the real-time rotating speed of the magnetic levitation blower reaches the rated rotating speed and operates normally, obtaining working voltage, utilizing the motor to conduct spontaneous power supply to a rotor part of the motor when the working voltage shows a descending trend, judging whether the rotor part stops completely, giving out fault alarm if the rotor part stops completely, and falling the main shaft after waiting for the rotor rotating speed to be reduced to a preset safe speed if the rotor rotating speed does not stop. Under the condition of unexpected power failure, the motor rotates by virtue of inertia and acts as a generator in a short time to supply the magnetic suspension bearing, so that the magnetic suspension bearing and the main shaft can be protected by falling down the main shaft after the rotating speed of the main shaft of the motor is reduced below a safe rotating speed.
In a third embodiment, the present invention further provides a computer storage medium having a computer program stored thereon, where the computer program when executed by the processor implements the steps of the control method of the spontaneous electromagnetic levitation blower system of the second embodiment.
In a fourth embodiment, the present invention further provides a computer program product, where a computer program is stored, where the computer program when executed by the processor implements the steps of the control method of the spontaneous electromagnetic levitation blower system of the second embodiment.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.
In the embodiments provided in the present application, it should be understood that the methods, apparatuses, electronic devices and storage media disclosed in the present application may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied essentially or in part or all of the technical solution or in part in the form of a software product stored in a readable storage medium, including instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. The readable storage medium includes a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, an optical disk, or other various media capable of storing program codes.
While the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that the foregoing embodiments may be modified or equivalents may be substituted for some of the features thereof, and that the modifications or substitutions do not depart from the spirit and scope of the embodiments of the invention.
Claims (10)
1. The self-generating electromagnetic suspension blower system is characterized by comprising a controller and a magnetic suspension bearing, wherein the controller is electrically connected with an external power supply, the controller is electrically connected with a frequency converter, the frequency converter is electrically connected with a motor, the magnetic suspension bearings are positioned on two sides of the motor, the motor is electrically connected with an isolated DC-DC power supply, a first isolating switch is connected between the frequency converter and the isolated DC-DC power supply, and a second isolating switch is electrically connected between the external power supply and the magnetic suspension bearing;
The frequency converter is used for adjusting the input voltage and frequency of the motor under the control of the controller so as to adjust the running speed of the motor;
the motor is used for generating mechanical energy through rotation under the control of the controller so as to drive the levitation operation of the magnetic suspension bearing, and converting part of the mechanical energy into electric energy under the control of the controller;
The magnetic suspension bearing is used for supporting a rotor part of the motor under the control of the controller;
the isolated DC-DC power supply is used for converting the electric energy generated by the magnetic suspension bearing to obtain direct-current voltage;
the first isolating switch is used for providing electric isolation between the motor and the frequency converter;
the second isolating switch is used for controlling the connection and disconnection between the external power supply and the frequency converter.
2. The spontaneous electromagnetic levitation blower system of claim 1, further comprising a sensor assembly coupled to the controller, the sensor assembly comprising a temperature sensor, a pressure sensor, a speed sensor, a displacement sensor, a current sensor, and a voltage sensor;
the temperature sensor is used for monitoring the real-time temperatures of the motor, the magnetic suspension bearing and the frequency converter;
The pressure sensor is used for monitoring system pressure and airflow pressure;
The speed sensor is used for monitoring the real-time rotating speed of the motor;
The displacement sensor is used for monitoring the position change of the magnetic suspension bearing;
the current sensor is used for monitoring a real-time current value;
the voltage sensor is used for monitoring the real-time voltage value.
3. The spontaneous electromagnetic levitation blower system of claim 2, further comprising a pressure relief valve coupled to the controller;
The pressure release valve is used for adjusting the opening and closing degree under the control of the controller when the system pressure exceeds a preset system pressure value and/or the air flow pressure exceeds a preset air flow pressure value so as to adjust the system pressure and/or the air flow pressure.
4. The spontaneous electromagnetic levitation blower system of claim 2, further comprising a magnetic bearing controller connected through the second isolation switch, the magnetic bearing controller connected to the magnetic levitation bearing;
The magnetic bearing controller is used for adjusting the magnetic force of the magnetic bearing according to the position change of the magnetic bearing.
5. The spontaneous electromagnetic levitation blower system of claim 1, further comprising a touch screen connected to the external power supply and the controller, respectively.
6. A control method of a spontaneous electromagnetic suspension blower system, characterized in that the method is applied to the spontaneous electromagnetic suspension blower system as claimed in claims 1 to 5, and the method comprises:
responding to a starting instruction, driving the levitation operation of the magnetic levitation bearing to levitate a main shaft of the supporting motor;
Acquiring the rated rotation speed of the magnetic suspension blower;
Under the condition that the real-time rotating speed of the magnetic suspension blower reaches the rated rotating speed and runs normally, if the magnetic suspension blower reaches the rated working point, the power supply of an external power supply is cut off;
acquiring working voltage, and when the working voltage shows a descending trend, utilizing the motor to perform self-power generation to supply to a rotor part of the motor;
Judging whether the rotor part is completely stopped, if so, giving out fault alarm, otherwise, waiting for the rotor rotating speed to be reduced to a preset safe speed, and then falling down the main shaft.
7. The method of controlling a spontaneous electromagnetic levitation blower system according to claim 6, further comprising, after responding to the start-up command:
checking whether the sensor assembly is in a normal running state or not, if not, sending out the fault alarm;
before obtaining the rated rotation speed of the magnetic suspension blower, the magnetic suspension blower further comprises:
and detecting the components of the spontaneous electromagnetic suspension blower system according to a preset detection flow.
8. The method of claim 7, wherein detecting components of the autonomous electromagnetic levitation blower system according to a predetermined detection procedure comprises:
detecting whether the current signal is stable or not, if not, sending out the fault alarm;
detecting whether the pressure release valve can adjust the opening and closing degree based on the adjusting instruction of the controller, if not, sending out the fault alarm;
Detecting whether the frequency converter can be started based on the starting instruction of the controller, if not, sending out the fault alarm;
And under the condition that the real-time rotating speed of the magnetic suspension blower reaches the rated rotating speed and runs normally, if the magnetic suspension blower reaches the rated working point, before cutting off the power supply of the external power supply, the magnetic suspension blower further comprises:
And closing the pressure relief valve, detecting whether the system pressure and/or the airflow pressure are/is in a preset normal interval, and if not, sending out the fault alarm.
9. A storage medium having stored thereon a computer program which, when executed by a processor, performs the method of any of claims 6-8.
10. A computer program product comprising a computer program, characterized in that the computer program, when executed by a processor, implements the method of any of claims 6-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202510174698.7A CN119652207A (en) | 2025-02-18 | 2025-02-18 | A spontaneous electromagnetic suspension blower system and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202510174698.7A CN119652207A (en) | 2025-02-18 | 2025-02-18 | A spontaneous electromagnetic suspension blower system and control method thereof |
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| Publication Number | Publication Date |
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| CN119652207A true CN119652207A (en) | 2025-03-18 |
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|---|---|---|---|
| CN202510174698.7A Pending CN119652207A (en) | 2025-02-18 | 2025-02-18 | A spontaneous electromagnetic suspension blower system and control method thereof |
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| Country | Link |
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| CN (1) | CN119652207A (en) |
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