JPS6430494A - Flux detection circuit - Google Patents
Flux detection circuitInfo
- Publication number
- JPS6430494A JPS6430494A JP62185424A JP18542487A JPS6430494A JP S6430494 A JPS6430494 A JP S6430494A JP 62185424 A JP62185424 A JP 62185424A JP 18542487 A JP18542487 A JP 18542487A JP S6430494 A JPS6430494 A JP S6430494A
- Authority
- JP
- Japan
- Prior art keywords
- polarity
- flux
- counting
- outputs
- information
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Control Of Ac Motors In General (AREA)
Abstract
PURPOSE:To perform detection of a flux actual value with a high accuracy little affected by drift or offset by obtaining said flux actual value as a digital quantity. CONSTITUTION:The output line voltage of a PWM inverter 1 is divided into the information on magnitude and polarity by a polarity detection circuit 3. A clock generator circuit 4 outputs a pulse having a frequency proportional to a DC intermediate voltage Edc. From said both outputs, a flux arithmetic circuit 5 switches the directions of counting up and down of a counter according to the information on polarity, conducts an integrating action by counting by means of a clock and obtains flux actual values phiR, phiS, phiT as digital quantities to contrive to improve the detection accuracy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62185424A JPS6430494A (en) | 1987-07-27 | 1987-07-27 | Flux detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62185424A JPS6430494A (en) | 1987-07-27 | 1987-07-27 | Flux detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6430494A true JPS6430494A (en) | 1989-02-01 |
Family
ID=16170547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62185424A Pending JPS6430494A (en) | 1987-07-27 | 1987-07-27 | Flux detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6430494A (en) |
-
1987
- 1987-07-27 JP JP62185424A patent/JPS6430494A/en active Pending
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