A.C. Motor control circuit
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Abstract/Description: | A microprocessor based A.C. motor control circuit which can be used for both open and closed loop control includes a pair of RAMs for storing separate groups of synchronized digital waveforms for driving an A.C. motor. The microprocessor is used to calculate the group of digital waveforms required to maintain a controlled motor parameter at a desired value. One RAM has an output connected to supply the group of digital waveforms stored therein to a motor driver, while the second RAM is connected to receive a new group of digital waveforms which have just been calculated by the microprocessor. Once the new group of waveforms have been loaded into the second RAM, the microprocessor generates control signals to disconnect the output of the first RAM from the motor driver, and to connect the output of the second RAM to supply the newly calculated digital waveforms to the motor driver. The first RAM is then connected to receive the next group of digital waveforms to be calculated by the microprocessor. |
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Subject(s): | 318/811 363/41 363/98 363/132 |
Date Issued: | 1982-06-29 |
Title: | A.C. Motor control circuit. |
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Name(s): |
The University of Toledo, assignee Stuart, Thomas A., inventor |
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Type of Resource: | text | |
Genre: | patent | |
Publisher: | United States Patent and Trademark Office | |
Other Date: | Date Filed: 1980-09-04 | |
Date Issued: | 1982-06-29 | |
Physical Form: | application/pdf | |
Extent: | 8 p. | |
Abstract/Description: | A microprocessor based A.C. motor control circuit which can be used for both open and closed loop control includes a pair of RAMs for storing separate groups of synchronized digital waveforms for driving an A.C. motor. The microprocessor is used to calculate the group of digital waveforms required to maintain a controlled motor parameter at a desired value. One RAM has an output connected to supply the group of digital waveforms stored therein to a motor driver, while the second RAM is connected to receive a new group of digital waveforms which have just been calculated by the microprocessor. Once the new group of waveforms have been loaded into the second RAM, the microprocessor generates control signals to disconnect the output of the first RAM from the motor driver, and to connect the output of the second RAM to supply the newly calculated digital waveforms to the motor driver. The first RAM is then connected to receive the next group of digital waveforms to be calculated by the microprocessor. | |
Identifier(s): |
utpatents-US4337429 (IID) Patent No.: US4337429 (patno) Appl. No.: 06/184107 (appno) |
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Subject(s): |
318/811 363/41 363/98 363/132 |
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Held by: | United States Patent and Trademark Office (USPTO) Public Search Facility | |
Location: | University of Toledo Digital Repository | |
Rights Statement: | No Copyright - United States | |
In Collections: |