Magnetic bearing system and its control circuit
A technology of magnetic levitation bearing and control circuit, applied in the direction of bearing, shaft and bearing, mechanical equipment, etc., can solve the problems of affecting the axial floating and falling, wrong floating position, affecting the floating position of the floating body, etc.
Active Publication Date: 2017-10-10
PROSOL
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Therefore, the existing magnetic bearing will not be able to correctly detect the floating position of the floating body, and the wrong floating position calculated according to the above will affect the control of the floating position of the floating body
[0005] In addition, the existing magnetic bearings are compensated by adjusting the variable resistors. The resistance of the variable resistors may vary due to manufacturing or product life, which will affect the axial floating height or crash
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0070] figure 1 It is a functional block diagram of a magnetic bearing control circuit according to an embodiment of the present invention. see figure 1 . A magnetic bearing control circuit 1, used to control an axial floating height of an axial active magnetic bearing of the magnetic bearing, the magnetic bearing control circuit 1 includes: a DC power supply module 10, an AC power supply module 12, and a switching module 14 , a first sensing unit Z1 , a cable C, a second sensing unit Z2 , a sensing module 16 and a processing module 18 . Actually, the DC power module 10 and the AC power module 12 are respectively coupled to the switching module 14 . The first sensing unit Z1 is coupled to the switching module 14 , the cable C and the sensing module 16 . The second sensing unit Z2 is coupled to the cable C. The sensing module 16 is coupled to the AC power module 12 and the processing module 18 .
[0071] For example, when the magnetic bearing is activated each time, the s...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a magnetic bearing system and its control circuit, which is suitable for controlling an axial floating height of a magnetic bearing. Wherein, the magnetic bearing control circuit includes a switch module, a DC power module, an AC power module, a first sensing unit, a cable, a second sensing unit, a sensing module and a processing module. Wherein, when the magnetic bearing is started, the DC power supply module and the switching module are in a conduction state, and the DC power supply module outputs a DC voltage, which is provided to the first sensing unit, the cable and the second sensing unit, so that the sensing unit The detection module detects the line resistance value of the cable and the second sensing unit, and provides it to the processing module, and the processing module judges that the line resistance value meets a default range, and the processing module controls the switching module to switch, so that the AC power supply module and The switching modules are in conduction state. The invention can accurately control the axial floating height of the axial active magnetic bearing.
Description
technical field [0001] The invention relates to a magnetic bearing system and its control circuit, in particular to a magnetic bearing system and its control circuit for controlling the axial floating height. Background technique [0002] A magnetic bearing is a bearing that supports the rotating shaft of a pump in a non-contact manner, and is used, for example, in a turbomolecular pump. Among them, the magnetic bearing has the characteristics of high rotation speed operation, no bearing wear, no lubricating oil and no maintenance. The magnetic bearing can movably control the rotating shaft to the axial floating height of the X-axis, Y-axis, Z-axis or radial axis. [0003] However, cables have electrostatic capacity, and the electrostatic capacity varies with the length of the cable. For example, the electrostatic capacitance of a 15-meter cable will be greater than that of a 5-meter cable, or the electrostatic capacitance of a 15-meter cable will be smaller than that of a...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): F16C32/04
Inventor 张书梵李应村
Owner PROSOL