GB1413145A - Inverters - Google Patents
InvertersInfo
- Publication number
- GB1413145A GB1413145A GB3954472A GB3954472A GB1413145A GB 1413145 A GB1413145 A GB 1413145A GB 3954472 A GB3954472 A GB 3954472A GB 3954472 A GB3954472 A GB 3954472A GB 1413145 A GB1413145 A GB 1413145A
- Authority
- GB
- United Kingdom
- Prior art keywords
- frequency
- pulses
- inverter
- gate
- duration
- 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.)
- Expired
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
- H02M7/505—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 using devices of a thyratron or thyristor type requiring extinguishing means
- H02M7/515—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 using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
1413145 Inverting DEUTSCHE AUTOMOBIL GmbH 24 Aug 1972 [27 Aug 1971] 39544/72 Heading H2F In a method of controlling an inverter having a plurality of controlled rectifiers (e.g. thyristors) each device is arranged to be pulsed during only part of its conductive period, the pulsing frequency being varied in dependence on the fundamental output frequency and the voltage time integral of the pulses over the pulsing period being maintained constant i.e. the output voltage being effectively proportional to frequency, the proportionality being adjustable by a further control signal. Fig. 1 (not shown) relates to a three-phase bridge of six thyristors with in verse diodes, each thyristor being capable of being turned on and off by unspecified means. Fig. 2 shows the control circuit for the inverter, the fundamental frequency being determined by the frequency of pulses a which are fed to a divider 1 which provides pulses b, c at half and quarter frequency, the latter being passed to a counter 2 to provide six control signals each displaced by 60 degrees to control a gate 6 which distributes turn-on and turn-off pulses to the thyristors of the inverter 7. Pulses at input frequency a, half frequency b or quarter frequency c are selected by gate 3 and fed to a shaper 4 so as to provide pulses g the duration of which is a function of the further control signal supplied at l. The pulses g are monitored in a comparator 5 which provides a signal i so as to determine which frequency will be passed by the gate 3. Comparator 5 determines whether the duration of pulse g is greater than or less than a fixed duration which is a function of the duration of oscillation phenomena in the commutating circuit. When low frequency pulses a are supplied, the inverter 7 produces a low frequency three-phase output for an asynchronous motor, the average value of the output being generally low but controllable by the signal at l. Fig. 4 (not shown) relates to operation when high frequency pulses are supplied at a, gate 3 being arranged to select quarter frequency pulses, each thyristor being pulsed on and off only once at the mid-point of its conductive period. Reference has been directed by the Comptroller to Specification 1,362,849.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19712142905 DE2142905A1 (en) | 1971-08-27 | 1971-08-27 | METHOD OF CONTROLLING AN INVERTER AND DEVICE FOR CARRYING OUT THIS METHOD |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1413145A true GB1413145A (en) | 1975-11-05 |
Family
ID=5817918
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3954472A Expired GB1413145A (en) | 1971-08-27 | 1972-08-24 | Inverters |
Country Status (4)
Country | Link |
---|---|
DE (1) | DE2142905A1 (en) |
FR (1) | FR2151919A5 (en) |
GB (1) | GB1413145A (en) |
IT (1) | IT961923B (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2554223C3 (en) * | 1975-12-03 | 1981-07-30 | Danfoss A/S, 6430 Nordborg | Control device for maintaining the stability of an inverter |
DE3044422C2 (en) * | 1980-11-26 | 1989-06-29 | Audi Nsu Auto Union Ag, 7107 Neckarsulm | Heating system for the passenger compartment of a motor vehicle |
DE3241828A1 (en) * | 1982-11-09 | 1984-05-10 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Method for suppressing harmonics in the output voltage of a converter |
-
1971
- 1971-08-27 DE DE19712142905 patent/DE2142905A1/en active Pending
-
1972
- 1972-08-08 IT IT5206472A patent/IT961923B/en active
- 1972-08-24 GB GB3954472A patent/GB1413145A/en not_active Expired
- 1972-08-25 FR FR7230315A patent/FR2151919A5/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
IT961923B (en) | 1973-12-10 |
FR2151919A5 (en) | 1973-04-20 |
DE2142905A1 (en) | 1973-03-08 |
DE2142905B2 (en) | 1975-04-03 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |