WO1985001844A1 - Pulse width modulated inverter - Google Patents
Pulse width modulated inverter Download PDFInfo
- Publication number
- WO1985001844A1 WO1985001844A1 PCT/US1984/001469 US8401469W WO8501844A1 WO 1985001844 A1 WO1985001844 A1 WO 1985001844A1 US 8401469 W US8401469 W US 8401469W WO 8501844 A1 WO8501844 A1 WO 8501844A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- inverter
- power supply
- frequency
- sine wave
- wave output
- Prior art date
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
- H02M7/53—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 triode or transistor type requiring continuous application of a control signal
- H02M7/537—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 triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/538—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 triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a push-pull configuration
- H02M7/53803—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 triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a push-pull configuration with automatic control of output voltage or current
-
- 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
- H02M7/4815—Resonant converters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Definitions
- the present invention relates to a pulse v/idth modulated inverter and more particularly to a pulse width modulated inverter having an improved output filter and a circuit for providing a low impedance path for AC ripple current or regenerative current flowing to the DC power supply of the inverter.
- a known pulse width modulated (PWM) inverter includes a center tapped power supply with positive and negative terminals, the center tap being connected to neutral or ground.
- the positive and negative terminals are connected to a low pass output filter through res- pective switches which may be transistors or the like.
- the inverter switches are controlled to alternately conduct current to the output filter, the switches providing a pulse width modulated waveform to the filter, which in response thereto, provides an AC output which is applied to a load.
- a very large output filter is typically required. Where the inverter is to be used in applications where weight is critical, such as on an aircraft, the use of such large filters is extremely undesirable.
- PWM inverters Another problem with known PWM inverters is their capacity to accept regenerative or ripple currents.
- Single phase inverter circuits or multiphase inverter circuits with unbalanced reactive loads circulate high levels of energy into and out of the DC power supply of the inverter.
- the DC power supply of the inverter typically includes capacitors for accepting all regenerative currents. Such capacitors, however, are typically large and bulky, increasing the weight of the inverter which is undesirable for many applications.
- the pulse width modulated inverter of the present invention includes a low pass output filter for providing a sine wave output in response to the pulse width modulated waveform and a notch filter which is coupled to the low pass filter and tuned to the frequency of the pulse width modulated waveform to eliminate that frequency from the sine wave output.
- the notch filter allows the size of the low pass output filter to be reduced.
- the pulse width modulated inverter also in ⁇ cludes a series resonant circuit connected in parallel with the DC power supply of the inverter, the circuit being tuned to two times the frequency of the sine wave output of the inverter for providing a low impedance path for AC ripple current flowing to the power supply from the load when the load is reactive. Because the power supply capacitors need only support the remaining com- ponents of the current flowing to the power supply, the capacitors may be reduced in size.
- Fig.l is a schematic diagram of one phase of the neutrally clamped PWM inverter of the present in- vention
- I AJ.. ⁇ P ⁇ I Fig. 2 is a graph illustrating the pulse width modulated waveform output from the inverter of Fig. 1 and the output voltage and current waveforms from the in ⁇ verter output filter.
- the inverter provides a pulse width modulated waveform at a junction 10 to an output filter generally designated 12, the filter having an AC output at a junction 16 which is applied to a load 18.
- the inverter includes a center tapped power supply generally designated 20 having a DC source 22 connected to a terminal 24 for providing a positive DC voltage and having a DC source 26 connected to a terminal 28 to provide a negative DC voltage, the center tap 30 being connected to neutral or ground.
- the inverter output filter and load 18 are coupled between the grounded center tap 30 and the positive and negative power supply terminals 24 and 28 through a pair of series connected transistors 32 and 34.
- the transistors 32 and 34 are controlled by a controller 36 to provide at the junction 10 a pulse width modulated waveform 37 as illustrated in Fig. 2.
- the pulse width modulated waveform output from the inverter at the junction 10 may, for example, have a frequency of 10 KHz, the pulse width modulated waveform being applied to the output filter 12 to provide a sine wave output at the junction 16 having a frequency of 400 Hz.
- the output filter 12 includes a low pass filter comprised of an inductor 38 and a capacitor 39 to provide a sine wave output at the junction 16 in response to the pulse width modulated waveform applied thereto.
- the filter 12 also includes a notch filter 40 in shunt with the load 18, the notch filter being comprised of an inductor 42 and a series connected capacitor 44.
- the notch filter 40 is tuned to the frequency of the pulse width modulated -waveform at the junction 10, i.e., 10 KHz to eliminate that frequency from the waveform output at the junction 16.
- the notch filter 40 reduces the atten ⁇ uation requirement of the low pass filter so that the size of the low pass filter may be reduced.
- the values of the inductor 42 and capacitor 44 of the notch filter may be selected to provide a product of 2.53 x 10 " so as to tune the notch filter to the pulse frequency of 10 KHz.
- the inductor 38 and capacitor 39 of the low pass filter are tuned to attenuate noise typically .on the order of 100 KHz, the inductor 38 having a value of 52.5 microhenries and the capacitor 39 having a value of .00048 microfarads.
- regenerative current flows from the load 18 to the DC power supply 20 during the 0°-60° and 180°-240° portions of the output waveform.
- the regenerative current flows to the power supply 20 through a. diode 50 connected in parallel with the transistor 32.
- the inverter transistor switch 34 is on, the regenerative current flows to the power supply from the load 18 through a diode 52.
- a series resonant circuit generally designated 54 is connected in parallel with the power supply 20 to provide a low impedance path for the AC component of current, a pair of capacitors 54 and 56 being connected in parallel with each of the DC sources 22 and 26 to accept the remaining components of current flowing to the power supply.
- the series resonant circuit 54 includes a first series resonant circuit 60 comprised of a capacitor 62 and an inductor 64 connected between the positive power supply terminal 24 and the center tap 30.
- the series resonant circuit 54 also includes a second series resonant circuit 66 comprised of a capacitor 68 and an inductor 70 connected between the negative power supply terminal 28 and the center tap 30.
- Each of the first and second series resonant circuits 60 and 66 is tuned to two times the frequency of the inverter output at the junction 16 to provide the. low impedance path for the AC component of current flowing to the power supply from the load.
- the frequency of the inverter output at the junc ⁇ tion 16 is 400 Hz
- —6 resonant circuit should be equal to .04 x 10 so that each of the circuits is tuned to 800 Hz or two times 400 Hz, the frequency of the sine wave output at the junction 16.
- the values of the capacitors 56 and 58 may be 720 microfar ds.
- the first series resonant circuit 60 provides a low impedance path for the AC component of current flowing to the power supply from the load while the transistor 32 is on.
- the second series resonant circuit provides a low impedance path for the AC component of
- OMPI WIPO current flowing to the power supply from the load when the transistor 34 is on because the power supply capacitors 56 and 58 need only support the remaining components of current flowing to the power supply, the size of the capacitors may be minimized.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
- Dc-Dc Converters (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB08513694A GB2158663A (en) | 1983-10-07 | 1984-09-17 | Pulse width modulated inverter |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US54000183A | 1983-10-07 | 1983-10-07 | |
US540,001 | 1983-10-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1985001844A1 true WO1985001844A1 (en) | 1985-04-25 |
Family
ID=24153555
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1984/001469 WO1985001844A1 (en) | 1983-10-07 | 1984-09-17 | Pulse width modulated inverter |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0159334A4 (en) |
JP (1) | JPS61500148A (en) |
DE (1) | DE3490486T1 (en) |
GB (1) | GB2158663A (en) |
IL (1) | IL72925A0 (en) |
IT (1) | IT1178036B (en) |
WO (1) | WO1985001844A1 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4967334A (en) * | 1989-09-12 | 1990-10-30 | Sundstrand Corporation | Inverter input/output filter system |
EP0443731A2 (en) * | 1990-02-20 | 1991-08-28 | Advanced Micro Devices, Inc. | Collision filter comprising at least one notch filter |
WO2001008288A2 (en) * | 1999-07-22 | 2001-02-01 | Eni Technology, Inc. | Power supplies having protection circuits |
US6469919B1 (en) | 1999-07-22 | 2002-10-22 | Eni Technology, Inc. | Power supplies having protection circuits |
US7180758B2 (en) | 1999-07-22 | 2007-02-20 | Mks Instruments, Inc. | Class E amplifier with inductive clamp |
GB2571732A (en) * | 2018-03-06 | 2019-09-11 | Reid Acoustic Designs Ltd | An apparatus |
US10686376B1 (en) * | 2019-05-06 | 2020-06-16 | Hamilton Sunstrand Corporation | Method and system for control of tunable passive component based power filters |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3038134A (en) * | 1958-01-18 | 1962-06-05 | Asea Ab | Means for reducing the harmonic currents in a static converter plant |
US3205424A (en) * | 1961-05-23 | 1965-09-07 | Gulton Ind Inc | Voltage phase controller employing synchronized square wave generators |
US3461372A (en) * | 1965-01-22 | 1969-08-12 | Int Standard Electric Corp | D.c. to a.c. power converter |
US3636430A (en) * | 1970-10-26 | 1972-01-18 | Westinghouse Electric Corp | Anticipatory feedback control for inverters |
US3746963A (en) * | 1971-06-09 | 1973-07-17 | Static Power Inc | Polyphase inverter with d.c. supply |
US4333134A (en) * | 1979-02-28 | 1982-06-01 | Chloride Group Limited | Converters |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4067057A (en) * | 1976-06-25 | 1978-01-03 | Pacific Electronic Enterprises Inc. | DC to AC switching converter |
-
1984
- 1984-09-12 IL IL72925A patent/IL72925A0/en unknown
- 1984-09-17 JP JP59503555A patent/JPS61500148A/en active Pending
- 1984-09-17 DE DE19843490486 patent/DE3490486T1/en not_active Withdrawn
- 1984-09-17 WO PCT/US1984/001469 patent/WO1985001844A1/en not_active Application Discontinuation
- 1984-09-17 EP EP19840903585 patent/EP0159334A4/en not_active Withdrawn
- 1984-09-17 GB GB08513694A patent/GB2158663A/en not_active Withdrawn
- 1984-10-05 IT IT48966/84A patent/IT1178036B/en active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3038134A (en) * | 1958-01-18 | 1962-06-05 | Asea Ab | Means for reducing the harmonic currents in a static converter plant |
US3205424A (en) * | 1961-05-23 | 1965-09-07 | Gulton Ind Inc | Voltage phase controller employing synchronized square wave generators |
US3461372A (en) * | 1965-01-22 | 1969-08-12 | Int Standard Electric Corp | D.c. to a.c. power converter |
US3636430A (en) * | 1970-10-26 | 1972-01-18 | Westinghouse Electric Corp | Anticipatory feedback control for inverters |
US3746963A (en) * | 1971-06-09 | 1973-07-17 | Static Power Inc | Polyphase inverter with d.c. supply |
US4333134A (en) * | 1979-02-28 | 1982-06-01 | Chloride Group Limited | Converters |
Non-Patent Citations (1)
Title |
---|
See also references of EP0159334A4 * |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4967334A (en) * | 1989-09-12 | 1990-10-30 | Sundstrand Corporation | Inverter input/output filter system |
EP0443731A2 (en) * | 1990-02-20 | 1991-08-28 | Advanced Micro Devices, Inc. | Collision filter comprising at least one notch filter |
EP0443731A3 (en) * | 1990-02-20 | 1992-10-21 | Advanced Micro Devices, Inc. | Improved collision filter |
US6885567B2 (en) | 1999-07-22 | 2005-04-26 | Eni Technology, Inc. | Class E amplifier with inductive clamp |
WO2001008288A3 (en) * | 1999-07-22 | 2001-10-11 | Eni Technology Inc | Power supplies having protection circuits |
US6469919B1 (en) | 1999-07-22 | 2002-10-22 | Eni Technology, Inc. | Power supplies having protection circuits |
WO2001008288A2 (en) * | 1999-07-22 | 2001-02-01 | Eni Technology, Inc. | Power supplies having protection circuits |
US7180758B2 (en) | 1999-07-22 | 2007-02-20 | Mks Instruments, Inc. | Class E amplifier with inductive clamp |
US7397676B2 (en) | 1999-07-22 | 2008-07-08 | Mks Instruments, Inc. | Class E amplifier with inductive clamp |
GB2571732A (en) * | 2018-03-06 | 2019-09-11 | Reid Acoustic Designs Ltd | An apparatus |
US11476821B2 (en) | 2018-03-06 | 2022-10-18 | Reid Acoustic Designs Ltd. | Electronic filter apparatus |
TWI806979B (en) * | 2018-03-06 | 2023-07-01 | 英商萊德音響設計有限公司 | An electronic filter apparatus |
US10686376B1 (en) * | 2019-05-06 | 2020-06-16 | Hamilton Sunstrand Corporation | Method and system for control of tunable passive component based power filters |
Also Published As
Publication number | Publication date |
---|---|
EP0159334A4 (en) | 1986-02-20 |
IT8448966A1 (en) | 1986-04-05 |
JPS61500148A (en) | 1986-01-23 |
IL72925A0 (en) | 1984-12-31 |
EP0159334A1 (en) | 1985-10-30 |
DE3490486T1 (en) | 1985-12-12 |
GB8513694D0 (en) | 1985-07-03 |
IT8448966A0 (en) | 1984-10-05 |
GB2158663A (en) | 1985-11-13 |
IT1178036B (en) | 1987-09-03 |
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