JPS5698372A - 3-phase sine wave generator - Google Patents
3-phase sine wave generatorInfo
- Publication number
- JPS5698372A JPS5698372A JP17358879A JP17358879A JPS5698372A JP S5698372 A JPS5698372 A JP S5698372A JP 17358879 A JP17358879 A JP 17358879A JP 17358879 A JP17358879 A JP 17358879A JP S5698372 A JPS5698372 A JP S5698372A
- Authority
- JP
- Japan
- Prior art keywords
- phase
- positive
- information
- negative half
- half cycles
- 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
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
PURPOSE:To improve the symmetry in positive and negative half cycles in the 3- phase sine wave generator by providing a memory storing digital information representing instantaneous value in predetermined phase of the half cycle of each phase and commonly using the read information in both the positive and the negative half cycles, thereby producing an AC wave. CONSTITUTION:The memory 1 storing digital information corresponding to the half cycle of the 3-phase AC and the polarity information of the phase voltage in predetermined address at different timings is read by a counter 2, the information is applied to a D/A converter 3, the output from the conveter 3 is applied to a comparator 8, which compares it with a signal from a triangular wave oscillator 9 to produce a pulse according to a pulse width modulation system. Subsequently, a polarity discriminator 11 generates a signal to a terminal U1F or U1R in positive and negative half cycles, the signal is applied through a switching circuit 12, thereby obtaining 3-phase AC. Since the positive and the negative half cycles are thus stored in the same address as common voltage information, the output waveform becomes entirely symmetrical, and the phase difference between the phases can also be accurately maintained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17358879A JPS5698372A (en) | 1979-12-29 | 1979-12-29 | 3-phase sine wave generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17358879A JPS5698372A (en) | 1979-12-29 | 1979-12-29 | 3-phase sine wave generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5698372A true JPS5698372A (en) | 1981-08-07 |
Family
ID=15963357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17358879A Pending JPS5698372A (en) | 1979-12-29 | 1979-12-29 | 3-phase sine wave generator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5698372A (en) |
-
1979
- 1979-12-29 JP JP17358879A patent/JPS5698372A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS6115669B2 (en) | ||
| GB1425654A (en) | Waveform generator | |
| JPH0685633B2 (en) | Pole switch firing control circuit | |
| GB1322596A (en) | Frequency polyphase power supply | |
| US4504899A (en) | Inverter firing control with error compensation | |
| JPS5698372A (en) | 3-phase sine wave generator | |
| US4599686A (en) | Method and apparatus for driving a transistorized polyphase pulse inverter | |
| JPS5698371A (en) | Polyphase ac inverter | |
| KR840004630A (en) | Digital generation method and apparatus of three-phase pulse width modulation waveform for variable speed control of induction motor | |
| JPS58198165A (en) | Detecting method for current of pwm converter | |
| GB1190847A (en) | Electric Inverting Apparatus | |
| SU1193764A1 (en) | Frequency multiplier | |
| SU1298833A2 (en) | Frequency multiplier | |
| SU566204A1 (en) | Phase-shifting network | |
| JPS5936513B2 (en) | PWM method inverter | |
| SU855855A1 (en) | Device for automatic synchronizing with constant advance time | |
| JPH0249573Y2 (en) | ||
| JPS58198164A (en) | Pwm signal generator | |
| SU474095A1 (en) | Control method for autonomous inverter | |
| KR950009125B1 (en) | Symmetric wave developing circuit with variable width | |
| SU492982A1 (en) | Control method of valve converter | |
| SU1141575A1 (en) | Converter of output signals of inductosyn | |
| SU1262706A1 (en) | Pulsed a.c.power regulator | |
| JPS5858869A (en) | Phase synchronization control circuit | |
| JPH0413847Y2 (en) |