Claims
- 1. A system for controlling plural magnetic bearing devices, the system comprising:a) a plurality of machine main bodies, each machine main body including: 1) position sensors for detecting the position of a rotary body; 2) magnetic bearings for magnetically contactlessly supporting the rotary body; and 3) a motor for rotatingly driving the rotary body at a predetermined speed; b) at least one controller for controlling the magnetic bearings based on signals from the position sensors and for controlling the motor based on signals from the position sensors, each said at least one controller said at least one controller including: 1) an analog-to-digital converter for converting analog signals from the position sensors into digital position signals and for outputting the digital position signals; 2) a digital signal processor for receiving the digital position signals and for determining control current values to be given to the magnetic bearings based on the received digital position signals and for outputting the control current values as digital control signals, the digital signal processor including: i) means for feeding first data, second data and third data to a first memory means for storage; and ii) means for reading magnetic bearing control parameters from a second memory means, for use as new control parameters; 3) a digital-to-analog converter for converting the digital control signals into analog signals and for feeding the analog signals to the magnetic bearings; 4) the first memory means for storing: i. the first data relating to a position of the rotary body, obtained from the position sensors; ii. the second data as to the control current values determined by the digital signal processor for the magnetic bearings; and iii. the third data relating to the speed of the rotary body; 5) the second memory means for storing: i. a program to be executed by the digital signal processor; and ii. the magnetic bearing control parameters, transmitted from a data processing means through a communication means; 6) a motor drive circuit for receiving the new control parameters relative to the predetermined speed of the rotary body and driving the motor based on the control parameters; c) the data processing means installed at a remote location away from the system for controlling said plural magnetic bearing devices, the data processing means including: 1) means for reading the first data and the second data from the first memory means through the communication means; and 2) means for transmitting the magnetic bearing control parameters to the second memory means through the communication means; and d) the communication means for connecting the system for controlling said plural magnetic bearing devices to the data processing means by modems corresponding to respective control means and communication lines.
- 2. The system of claim 1, wherein:the communication lines include telephone lines.
- 3. The system of claim 1, wherein:the communication lines include integrated services digital network (ISDN) lines.
- 4. The system of claim 1, further comprising:a server, connected to the communication lines, for connecting the plurality of control means to the data processing means.
Priority Claims (1)
Number |
Date |
Country |
Kind |
8-117381 |
May 1996 |
JP |
|
Parent Case Info
This is a continuation of U.S. Application Ser. No. 08/841,810, filed May 5, 1997.
US Referenced Citations (10)
Non-Patent Literature Citations (1)
Entry |
“Market Uprising? DSP Revolution is in the Air”, Electronics Buyers' News, pp 32, Jan. 11, 1993. |
Continuations (1)
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Number |
Date |
Country |
Parent |
08/841810 |
May 1997 |
US |
Child |
09/208428 |
|
US |