WO2004030204A1 - 発動発電機用インバータ - Google Patents
発動発電機用インバータ Download PDFInfo
- Publication number
- WO2004030204A1 WO2004030204A1 PCT/JP2003/012209 JP0312209W WO2004030204A1 WO 2004030204 A1 WO2004030204 A1 WO 2004030204A1 JP 0312209 W JP0312209 W JP 0312209W WO 2004030204 A1 WO2004030204 A1 WO 2004030204A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- circuit
- voltage
- phase
- gate
- generator
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/42—Arrangements for controlling electric generators for the purpose of obtaining a desired output to obtain desired frequency without varying speed of the generator
-
- 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
-
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/0083—Converters characterised by their input or output configuration
- H02M1/0085—Partially controlled bridges
Definitions
- the present invention converts the output voltage of an inverter for an engine generator, in particular, the output voltage of an engine driven by an internal combustion engine (engine) into DC by a thyristor-mixed-bridge rectifier circuit, and reconverts the output voltage by an inverter unit.
- the gate control of the thyristor in the thyristor-mixing-type rectifier circuit is controlled separately for the light and heavy loads.
- the present invention relates to an inverter for a power generator, which can suppress flicker (voltage fluctuation) at a light load.
- the output of the generator is converted to DC once to solve the problem that the output of the engine-driven generator fluctuates depending on the load conditions, etc.
- An AC output is obtained through an invar unit that can control the frequency at a constant level.
- Patent Document 1 Japanese Patent Application Laid-Open No. 62-27272873
- Patent Document 2 Japanese Patent Application Laid-Open No. 10-280400
- the present invention has been made in view of the above points, and converts the output voltage of a motor generator driven by an internal combustion engine to DC by a thyristor-mixed-bridge rectifier circuit and reconverts the output voltage by an inverter unit.
- the thyristor-mixed-bridge type rectifier circuit controls the gate control of the thyristor in a thyristor-mixed rectifier circuit by dividing the load into light and heavy loads. It is another object of the present invention to provide an engine generator unit capable of suppressing a flicker force under a light load. Disclosure of the invention
- An object of the present invention is to provide an inverter for an engine generator that can suppress flicker of an AC output voltage at a light load with a simple circuit configuration.
- Another object of the present invention is to provide a bridge-type member suitable for converting a voltage converted into a DC based on a generated AC voltage into an AC voltage having a predetermined frequency.
- Still another object of the present invention is to provide a sub winding suitable for downsizing an AC generator. It is to be.
- Still another object of the present invention is to provide a thyristor-mixed-bridge rectifier-type rectifier circuit with phase control for thyristor-gate gate control in accordance with the current value detected by the current detector, depending on whether the load is light or normal.
- the purpose is to provide a gate selector for selecting on / off control.
- the current is converted into a direct current by a thyristor-mixed-bridge-type rectifier circuit and the output voltage is converted.
- a sub-winding that generates a voltage in the same phase as the main power generation winding, in a motor-generator unit having a ridge-type unit that converts the voltage to a constant-voltage AC voltage again.
- a current detector that detects the current flowing in the bridge-type inverter, a gate circuit that applies a gate voltage to all thyristors of the thyristor-mixed rectifier circuit, and a main generator winding that is in phase with the sub winding.
- a limited gate circuit that applies a gate voltage to the thyristor that rectifies the generated voltage, a phase detection circuit that detects the phase of the voltage from the sub winding, and a thyristor mixed-bridge rectifier circuit
- a DC voltage detection circuit that monitors the DC output voltage by comparing the DC output voltage with a reference voltage based on the DC output voltage; and a phase detection circuit when the load current value detected by the current detection unit is equal to or less than a predetermined threshold value.
- a limited gate circuit that performs phase control corresponding to the load current value based on the phase signal is selected, and when the load current value detected by the current detection unit exceeds a predetermined threshold value, the DC voltage detection circuit is used.
- a gate selection unit that selects a gate circuit that performs on / off control based on the result of comparison with the reference voltage.
- the thyristor of the mixed-bridge rectifier circuit is determined by the current value detected by the current detection unit. The control is performed by switching between the phase control mode and the on / off control mode.
- FIG. 1 is a configuration diagram of an embodiment of an inverter for a power generator according to the present invention.
- FIG. 2 is a configuration diagram of an engine generator using the engine generator unit according to the present invention.
- FIG. 3 shows the one-phase control mode of the inverter for the generator of the present invention at light load.
- FIG. 7 is a diagram illustrating a comparison of the flicking force between one mode and all three phase control modes.
- FIG. 4 is a diagram for explaining the occurrence of a shift in the off time of the thyristor in the phase control mode for all three phases. .
- FIG. 5 is an explanatory diagram of one embodiment of a thyristor turn-on corresponding to an increase or decrease in load current.
- FIG. 2 shows a configuration diagram of an engine generator using the engine generator inverter according to the present invention.
- reference numeral 1 is a magnet field alternator
- 2 is a three-phase rectifier circuit
- 3 to 5 are rectifiers (diodes)
- 6 to 8 are thyristors
- 9 is a thyristor gate signal generation circuit.
- 10 is a smoothing capacitor
- 11 is a bridge type inverter
- 12 is a first switch (transistor)
- 13 is a second switch (transistor)
- 14 is a third switch (transistor)
- 1 5 is a fourth switch (transistor)
- 16 to 19 are gate signal supply units
- 20 is a gate signal generation unit
- 21 is a load
- 22 is a choke coil.
- the magnet field AC generator 1 is driven to rotate by an engine (not shown), and generates an AC voltage having a frequency proportional to the engine speed.
- the output from the magnet field alternator 1 is also proportional to the engine speed.
- the three-phase AC voltage generated by the magnet field AC generator 1 is converted into a DC voltage in the three-phase rectifier circuit 2.
- the DC voltage is smoothed by the smoothing capacitor 10 and supplied to the bridge-type inverter 11.
- the three-phase rectifier circuit 2 is composed of three diodes 3 to 5 and three thyristors 6 to 8, and the gate signal generating circuit 9 for thyristor shown in FIG. Generates a gate signal to turn on and off thyristors 6 to 8 so that the output voltage is maintained at a constant value.
- the gate signal is supplied to thyristors 6 to 8. That is, the output side voltage of the three-phase rectifier circuit 2 is kept at a constant value.
- the first switch 12 and the third switch 1 The switch 14 is turned on in a first cycle, and the second switch 13 and the fourth switch 15 are turned on in a second cycle. That is, a gate signal is applied to each of the switches 12 to 15 as described above.
- the first switch 12, the choke coil 22, the load 21 and the third switch 14 pass through the load 21 and, for example, the arrow X in the drawing.
- an alternating current is supplied to the load 21 through the second switch 13, the load 21, the choke coil 22, and the fourth switch 15.
- the alternating current is kept at a frequency with no predetermined fluctuation.
- the gate signal applied to the first switch 12 to the fourth switch 15 is, as is well known, a square wave gate signal such that the illustrated bridge-type inverter forms a so-called square-wave inverter. Formed into a shape.
- the square wave gate signal for the first switch 12 and the square wave gate signal for the third switch 14 that are turned on in the first cycle are as follows: Is generated as follows.
- the timing at which the rectangular wave gate signal for the third switch 14 shifts from the on state to the off state is determined by the timing at which the rectangular wave gate signal for the first switch 12 shifts from the on state to the off state. It is going to be faster.
- the square wave gate signal for the second switch 13 and the square wave gate signal for the fourth switch 15 that are turned on in the second cycle are as follows: Is generated as follows.
- FIG. 1 is a block diagram showing an embodiment of an inverter for a power generator according to the present invention.
- reference numerals 1 to 8, 10, 0, 11 and 22 in FIG. It corresponds to each thing.
- 31 is a sub winding
- 32 is a shunt resistor (current detection part)
- 33 is a gate circuit
- 34 is a limited gate circuit
- 35 is a phase detection circuit
- 36 is a phase detection circuit.
- the sub winding 31 is one of the three phases of the U-phase, V-phase and W-phase of the magnet field alternator 1, for example, the voltage in the same phase as the W-phase main winding W as shown in the figure. Is wound around the magnet field alternator 1 so as to generate The sub winding 31 also serves as a control power supply for each circuit that controls the bridge type inverter 11.
- the shunt resistor 32 detects the current flowing through the load 21 by detecting the current flowing through the field-effect transistor (FET) 12 of the bridge type inverter 11 equivalently or conveniently. .
- the shunt resistor 32 may directly detect the current flowing to the load 21.
- the gate circuit 33 is a circuit that applies a gate voltage to the three-phase rectifier circuit 2, that is, all the thyristors 3, 4, and 5 of the thyristor-mixed-bridge rectifier circuit at the same time, and controls the transistors 45 to off. Then, the DC voltage rectified by the diode 48 in the constant voltage generation circuit 37 is applied to the gate of the corresponding thyristor 6, 7, 8 via the diodes 49, 50, 51 as the gate voltage. Each is applied at a time.
- the limited gate circuit 34 is a circuit that applies a gate voltage only to the thyristor 8 that rectifies the AC voltage generated in the W-phase main generator winding W of the magnet field AC generator 1. When turned off, the DC voltage rectified by the diode 48 in the constant voltage generation circuit 37 is applied to the gate of only the thyristor 8 via the diode 52 as the gate voltage. ing.
- the phase detection circuit 35 generates a zero-cross signal and a triangular wave synchronized with the W-phase main power generation winding W based on the AC voltage generated by the sub winding 31.
- the gate selection unit 36 determines whether the current value of the FET 12 is equal to or smaller than the threshold value based on the zero cross timing from the phase detection circuit 35 and the phase angle signal based on the triangular wave.
- the limited gate selection circuit 41 that performs phase control corresponding to the current value flowing through the shunt resistor 32 is selected, and the current value of the FET 1 2 flowing through the shunt resistor 32 exceeds a predetermined threshold value.
- the gate selection circuit 40 for performing on / off control is selected based on the result of comparison with the reference voltage in the current voltage detection circuit 38.
- the gate selection unit 36 includes an instruction circuit 39, a gate selection circuit 40, a limited gate selection circuit 41, and an operational amplifier 44, and indicates a current value flowing through the shunt resistor 32 input to the operational amplifier 44.
- the indicating circuit 39 supplies the detection signal of the DC voltage detecting circuit 38 to the gate selecting circuit 40 when the current value exceeds the predetermined threshold value (normal load).
- the limited gate selection circuit 41 is shut off.
- the indicating circuit 39 cuts off the gate selection circuit 40 and sets the limited gate. The current value is sent to the selection circuit 41, and the limited gate selection circuit 41 outputs a signal of a phase angle corresponding to the current value from the zero cross timing from the phase detection circuit 35.
- the constant voltage generation circuit 37 rectifies the AC voltage generated in the sub-winding 31 and converts it into a DC voltage as described in the limited gate circuit 34, etc. And a constant voltage IC 53 for supplying a control power supply to each control circuit of the bridge type inverter 11.
- the DC voltage detection circuit 38 is a three-phase rectifier circuit 2, that is, a DC voltage converted by the thyristor-mixed bridge rectifier circuit and the smoothing capacitor 10 and divided by resistors 54 and 55 to obtain the voltage. Based on this, it is a DC voltage monitoring circuit that obtains a detection signal for keeping the AC output voltage to the load 21 constant.
- the detection signal detected from the DC voltage detector 43 provided in the DC voltage detection circuit 38 is input to both the gate selection circuit 40 and the limited gate selection circuit 41 of the gate selection unit 36. .
- the detection signal output from the DC voltage detector 43 is processed in each circuit of the gate selection circuit 40 or the limited gate selection circuit 41 selected by the instruction circuit 39 described above, and the gate circuit 3
- the transistor 45 of 3 is controlled to be turned on or off in response to the detection signal, or the transistor 46 of the limited gate circuit 34 is capable of responding to the detection signal under the phase corresponding to the W phase as described above. Then, it is turned off at a predetermined phase.
- thyristor 8 when the load is light, only thyristor 8 is fired in the phase control mode (that is, when the DC output voltage value at point A of the three-phase rectifier circuit 2 is insufficient, the current value of FET 12 (load Current)
- the timing of the phase at which thyristor 8 is turned on is determined according to the DC output voltage value at point A of the three-phase rectification circuit 2 so as to be kept constant.
- the load is a normal load such as a rated load
- an ON or OFF signal is applied to the gates of all thyristors 6, 7, and 8 at the same time depending on whether the DC output voltage at point A is above or below the set value. In this way, the AC output voltage to the load 21 is kept constant.
- each circuit section in the ridge-type inverter 11 that operates so as to output a constant-frequency AC rectangular wave is the same as that in FIG. 2, and a description thereof will be omitted.
- the current of the FET 12 flowing through the shunt resistor 32 is equal to or less than a predetermined threshold value.
- the instruction circuit 39 sends the current value converted by the operational amplifier 4 4 to the limited gate selection circuit 41. Then, a zero-cross signal and a triangular wave signal synchronized with the W-phase main generator winding W of the magnet field AC generator 1 are sent from the operational amplifier 42 to the limited gate selection circuit 41, and the limited gate selection circuit 41
- the detection signal output by the voltage detector 43 controls the transistor 46 of the limited gate circuit 34 to be turned on or off at a phase angle according to the current value from the indicating circuit 39 when the DC voltage is insufficient.
- the gate selection circuit 40 outputs a signal to turn on the transistor 45 of the gate circuit 33. Therefore, the gate voltage is applied only to the thyristor 8 through the diode 52. . In other words, only the output of one phase of the magnet field alternator 1 is supplied through the thyristor 8 and the thyristor 8 is in the phase control mode to keep the AC output voltage to the load 21 constant. Perform control operation. In this case, the entire three phases of the magnet field AC generator 1 may be in the phase control mode, but since the load is light, the AC output voltage can be sufficiently controlled by the phase control of one phase of the magnet field AC generator 1. Can be kept constant.
- the on / off control mode determines whether or not three phases of the magnet field AC generator 1 are three-phase rectified, and performs a control operation to keep the AC output voltage to the load 21 constant.
- the flicker of the AC output voltage in the on-off control mode as to whether or not to perform the three-phase rectification for all three phases in a normal load is as follows.
- the on / off control mode of whether or not to perform three-phase rectification of all three phases under a normal load the three-phase main power generation winding of the magnet field AC generator 1 is generated as shown in FIG.
- the DC output voltage value at point ⁇ of the thyristor mixed ridge rectifier circuit 2 exceeds the reference value of the DC voltage detector 43, and Suppose that a gate signal for turning off 6, 7, and 8 is issued (the gate signal is dropped to zero). From the nature of the thyristor, the U-phase thyristor 6 continues to turn on until the above timing T3.
- the device has a drawback that it is visually recognized as a change in luminance / illuminance of light, and the flickering force of the AC output voltage is not ignored.
- the present invention solves this point by adopting switching to the phase control mode at light load.
- the phase control mode at the time of light load in the engine generator chamber of the present invention only the thyristor 8 is controlled in phase.
- W The current firing angle (90 + 0) in the phase of the phase. (However, the phase angle is shifted from 1 (90 ° ⁇ ⁇ 90 °) to the direction of decreasing 0.
- Fig. 5 ( ⁇ ) and Fig. 5 ( ⁇ ) show the situation where thyristor 8 is phase controlled.
- the fluctuation of the DC voltage value at the point ⁇ ⁇ is a control capable of reducing the voltage fluctuation since the thyristor 8 is turned on during each half-wave of the W-phase AC voltage. Therefore, the DC voltage value is finely controlled even at a light load. That is, the long-period ripple under light load is eliminated.
- the sub winding wound separately from the main power generation winding of the generator for the control power supply of the inverter is in phase with the main power generation winding of the generator.
- the output voltage is made constant by the phase control method of the main power generation winding.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
- Rectifiers (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004539519A JP4392351B2 (ja) | 2002-09-25 | 2003-09-25 | 発動発電機用インバータ |
AU2003266604A AU2003266604A1 (en) | 2002-09-25 | 2003-09-25 | Inverter for engine generator |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002279840 | 2002-09-25 | ||
JP2002-279840 | 2002-09-25 |
Publications (1)
Publication Number | Publication Date |
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WO2004030204A1 true WO2004030204A1 (ja) | 2004-04-08 |
Family
ID=32040470
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2003/012209 WO2004030204A1 (ja) | 2002-09-25 | 2003-09-25 | 発動発電機用インバータ |
Country Status (3)
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JP (1) | JP4392351B2 (ja) |
AU (1) | AU2003266604A1 (ja) |
WO (1) | WO2004030204A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006174636A (ja) * | 2004-12-17 | 2006-06-29 | Fuji Electric Systems Co Ltd | 補助電源装置 |
WO2022180703A1 (ja) * | 2021-02-24 | 2022-09-01 | 本田技研工業株式会社 | 発電機、制御装置及び制御方法 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012050237A (ja) * | 2010-08-26 | 2012-03-08 | Ihi Corp | 発電装置 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62272873A (ja) * | 1986-05-19 | 1987-11-27 | Honda Motor Co Ltd | インバ−タ装置 |
JPH06121597A (ja) * | 1992-10-06 | 1994-04-28 | Honda Motor Co Ltd | インバータ制御式発電機 |
JPH0787799A (ja) * | 1993-09-16 | 1995-03-31 | Isuzu Motors Ltd | 交流発電機の出力制御装置 |
JPH11136998A (ja) * | 1997-10-24 | 1999-05-21 | Honda Motor Co Ltd | 可搬型電源装置 |
-
2003
- 2003-09-25 JP JP2004539519A patent/JP4392351B2/ja not_active Expired - Fee Related
- 2003-09-25 WO PCT/JP2003/012209 patent/WO2004030204A1/ja active Application Filing
- 2003-09-25 AU AU2003266604A patent/AU2003266604A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62272873A (ja) * | 1986-05-19 | 1987-11-27 | Honda Motor Co Ltd | インバ−タ装置 |
JPH06121597A (ja) * | 1992-10-06 | 1994-04-28 | Honda Motor Co Ltd | インバータ制御式発電機 |
JPH0787799A (ja) * | 1993-09-16 | 1995-03-31 | Isuzu Motors Ltd | 交流発電機の出力制御装置 |
JPH11136998A (ja) * | 1997-10-24 | 1999-05-21 | Honda Motor Co Ltd | 可搬型電源装置 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006174636A (ja) * | 2004-12-17 | 2006-06-29 | Fuji Electric Systems Co Ltd | 補助電源装置 |
WO2022180703A1 (ja) * | 2021-02-24 | 2022-09-01 | 本田技研工業株式会社 | 発電機、制御装置及び制御方法 |
Also Published As
Publication number | Publication date |
---|---|
AU2003266604A1 (en) | 2004-04-19 |
JP4392351B2 (ja) | 2009-12-24 |
JPWO2004030204A1 (ja) | 2006-01-26 |
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