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1. 发明专利

DE69116995D1 未知
公开(公告)号：DE69116995D1
公开(公告)日：1996-03-21
申请号：DE69116995
申请日：1991-11-06
申请人： HITACHI LTD
发明人： KAWAGUCHI YASUTSUGU , ISHII MAKOTO
IPC分类号： H02M7/21 , G05F1/70 , H02M3/158 , H02M5/45 , H02M7/12 , H02M7/217
摘要： A power supply basically includes a rectifying section (10) for rectifying a sinusoidal a.c. voltage, a switching section (11) for receiving a voltage output from the rectifying section, and a smoothing section (12) having a smoothing capacitor. The power supply is controlled to have a sinusoidal load current and for the purpose, includes as a feature a power source circuit having a first path for flowing current from the rectifying section to the smoothing section and a second path for flowing current from an inductor (15) of the switching section to the smoothing section, circuits (16, 17) for sensing the current flowing through the first path and forming a reference current with a target waveform based on the sensed current, circuits (18, 19, 20) for sensing the current flowing through the switching element and determining such a conduction ratio of the switching element as matching the waveform of the sensed current to the waveform of the reference current, and a control circuit (21) for sequentially controlling a plurality of switching elements connected in parallel on and off based on the determined conduction ratio.

2. 发明专利

DE69533001T2 未知
公开(公告)号：DE69533001T2
公开(公告)日：2005-05-04
申请号：DE69533001
申请日：1995-10-06
申请人： HITACHI LTD
发明人： NOTOHARA YASUO , KAWABATA YUKIO , TAHARA KAZUO , ISHII MAKOTO , TAKAKURA YUHACHI
IPC分类号： H02M5/458 , H02P21/18 , H02P21/24 , H02P23/16 , H02P23/26 , H02P25/022 , H02P25/026 , H02P25/22 , H02P5/41 , H02P5/408 , F24F11/00 , G05D23/19 , B60H1/32 , B60H1/00 , G05F1/575
摘要： A motor controller made up of a power supply circuit rectifying an AC power supply for outputting desired DC voltages and, at the same time, improving the power factor of the AC power supply and a motor drive circuit for driving a motor. The same comprises a rectifier circuit for converting AC power supply to DC and a smoothing circuit, a converter circuit constituted of a chopper circuit for controlling the DC voltage by utilizing switching operation and inductance's energy storing effect, a motor drive device made up of an inverter circuit connected to the output of the converter circuit and a motor, a converter control circuit for controlling the switching operation of the chopper circuit, an inverter control circuit for controlling the switching operation of the inverter circuit thereby driving the motor, a speed detector circuit for detecting the position of the rotor of the motor and calculating the speed of the motor, a speed control circuit receiving the calculated speed value and a speed command value for controlling the motor speed through the inverter circuit, and a DC voltage control circuit receiving the output signal of the speed control circuit for controlling the DC voltage through the converter control circuit in accordance with the output signal. The DC voltage control circuit, when the output of the speed control circuit reaches a predetermined value, outputs a signal to cause the DC voltage to increase or decrease to the converter control circuit. The output of the speed control circuit is a duty ratio signal or a speed deviation signal of the calculated speed value from the speed command value.

3. 发明专利

DE69727759D1 未知
公开(公告)号：DE69727759D1
公开(公告)日：2004-04-01
申请号：DE69727759
申请日：1997-10-17
申请人： HITACHI LTD
发明人： NOTOHARA YASUO , KAWABATA YUKIO , ISHII MAKOTO , SHINOZAKI HIROSHI , KATO KOJI , TAKAKURA YUHACHI
IPC分类号： H02M5/458 , H02P6/08 , H02P6/20
摘要： A motor drive apparatus and an air-conditioner using the motor control apparatus of the invention has a feature to be able to gradually increase the dc voltage value (Ed) to a predetermined value when starting the switching operation of a chopper circuit by means of the dc voltage control means thereof, and when stopping the switching operation of the chopper circuit to be able to gradually decrease the dc voltage value (Ed) to a predetermined value. Further, the dc voltage command value (Ed*) is adjusted so as to be able to maintain a preferred value of dc voltage. Thereby, fluctuation in the number of revolutions of the motor (N) can be prevented even if the converter is started or stopped while the motor is operating, thereby allowing the motor drive apparatus and air-conditioner using the motor control apparatus of the invention to be operated at their maximum capacities.

4. 发明专利

ES2082907T3 未知
公开(公告)号：ES2082907T3
公开(公告)日：1996-04-01
申请号：ES91118911
申请日：1991-11-06
申请人： HITACHI LTD
发明人： KAWAGUCHI YASUTSUGU , ISHII MAKOTO
IPC分类号： H02M7/21 , G05F1/70 , H02M3/158 , H02M5/45 , H02M7/12 , H02M7/217
摘要： A power supply basically includes a rectifying section (10) for rectifying a sinusoidal a.c. voltage, a switching section (11) for receiving a voltage output from the rectifying section, and a smoothing section (12) having a smoothing capacitor. The power supply is controlled to have a sinusoidal load current and for the purpose, includes as a feature a power source circuit having a first path for flowing current from the rectifying section to the smoothing section and a second path for flowing current from an inductor (15) of the switching section to the smoothing section, circuits (16, 17) for sensing the current flowing through the first path and forming a reference current with a target waveform based on the sensed current, circuits (18, 19, 20) for sensing the current flowing through the switching element and determining such a conduction ratio of the switching element as matching the waveform of the sensed current to the waveform of the reference current, and a control circuit (21) for sequentially controlling a plurality of switching elements connected in parallel on and off based on the determined conduction ratio.

5. 发明专利

DE69725069D1 未知
公开(公告)号：DE69725069D1
公开(公告)日：2003-10-30
申请号：DE69725069
申请日：1997-07-14
申请人： HITACHI LTD
发明人： KATOU KOUJI , INOUE TORU , ISHII MAKOTO , TAKAKURA YUHACHI , NOTOHARA YASUO , KAWABATA YUKIO , SHINOZAKI HIROSHI , NAKAMURA HIROO , TAKAKU SHOJI , MORIMOTO MOTOO
IPC分类号： F04C29/00 , H02M1/00 , H02M1/10 , H02M1/42 , H02P4/00 , H02J1/02 , H02P7/01
摘要： For achieving an air conditioner being applicable to various a-c source voltages in common and operative with high power factor by suppressing generation of high harmonics, an a-c source voltage from an a-c electric power source 1 is rectified in full-wave by a rectifier 2, and a d-c source voltage Ed of an inverter 13 is obtained by being charged in a condenser 5. Here, there are a-c source voltages of 100 V and 200 V, and a divided voltage Ed1 of the d-c voltage of the condenser 5 is selected when the a-c source voltage is 100 V, a divided voltage Ed2 (here, Ed1 > Ed1) of the d-c voltage of the condenser 5 is selected when the a-c source voltage is 200 V, respectively by an exchange switch 18, and is used as a d-c voltage Ed' for controlling on and off of a switch element 6. Though the d-c source voltage Ed differs depending on the a-c source voltage of 100 V or 200 V, it is possible to set the d-c source voltage Ed at a voltage value for operating the inverter 13 with low loss and high efficiency, for each one of the a-c source voltages, by setting a ratio of the voltage division appropriately.

6. 发明专利

DE69116995T2 未知
公开(公告)号：DE69116995T2
公开(公告)日：1996-09-26
申请号：DE69116995
申请日：1991-11-06
申请人： HITACHI LTD
发明人： KAWAGUCHI YASUTSUGU , ISHII MAKOTO
IPC分类号： H02M7/21 , G05F1/70 , H02M3/158 , H02M5/45 , H02M7/12 , H02M7/217
摘要： A power supply basically includes a rectifying section (10) for rectifying a sinusoidal a.c. voltage, a switching section (11) for receiving a voltage output from the rectifying section, and a smoothing section (12) having a smoothing capacitor. The power supply is controlled to have a sinusoidal load current and for the purpose, includes as a feature a power source circuit having a first path for flowing current from the rectifying section to the smoothing section and a second path for flowing current from an inductor (15) of the switching section to the smoothing section, circuits (16, 17) for sensing the current flowing through the first path and forming a reference current with a target waveform based on the sensed current, circuits (18, 19, 20) for sensing the current flowing through the switching element and determining such a conduction ratio of the switching element as matching the waveform of the sensed current to the waveform of the reference current, and a control circuit (21) for sequentially controlling a plurality of switching elements connected in parallel on and off based on the determined conduction ratio.

7. 发明专利

DE69727759T2 未知
公开(公告)号：DE69727759T2
公开(公告)日：2004-10-07
申请号：DE69727759
申请日：1997-10-17
申请人： HITACHI LTD
发明人： NOTOHARA YASUO , KAWABATA YUKIO , ISHII MAKOTO , SHINOZAKI HIROSHI , KATO KOJI , TAKAKURA YUHACHI
IPC分类号： H02M5/458 , H02P6/08 , H02P6/20
摘要： A motor drive apparatus and an air-conditioner using the motor control apparatus of the invention has a feature to be able to gradually increase the dc voltage value (Ed) to a predetermined value when starting the switching operation of a chopper circuit by means of the dc voltage control means thereof, and when stopping the switching operation of the chopper circuit to be able to gradually decrease the dc voltage value (Ed) to a predetermined value. Further, the dc voltage command value (Ed*) is adjusted so as to be able to maintain a preferred value of dc voltage. Thereby, fluctuation in the number of revolutions of the motor (N) can be prevented even if the converter is started or stopped while the motor is operating, thereby allowing the motor drive apparatus and air-conditioner using the motor control apparatus of the invention to be operated at their maximum capacities.

8. 发明专利

DE69533001D1 未知
公开(公告)号：DE69533001D1
公开(公告)日：2004-06-09
申请号：DE69533001
申请日：1995-10-06
申请人： HITACHI LTD
发明人： NOTOHARA YASUO , KAWABATA YUKIO , TAHARA KAZUO , ISHII MAKOTO , TAKAKURA YUHACHI
IPC分类号： H02M5/458 , H02P21/18 , H02P21/24 , H02P23/16 , H02P23/26 , H02P25/022 , H02P25/026 , H02P25/22 , H02P5/41 , H02P5/408 , F24F11/00 , G05D23/19 , B60H1/32 , B60H1/00 , G05F1/575
摘要： A motor controller made up of a power supply circuit rectifying an AC power supply for outputting desired DC voltages and, at the same time, improving the power factor of the AC power supply and a motor drive circuit for driving a motor. The same comprises a rectifier circuit for converting AC power supply to DC and a smoothing circuit, a converter circuit constituted of a chopper circuit for controlling the DC voltage by utilizing switching operation and inductance's energy storing effect, a motor drive device made up of an inverter circuit connected to the output of the converter circuit and a motor, a converter control circuit for controlling the switching operation of the chopper circuit, an inverter control circuit for controlling the switching operation of the inverter circuit thereby driving the motor, a speed detector circuit for detecting the position of the rotor of the motor and calculating the speed of the motor, a speed control circuit receiving the calculated speed value and a speed command value for controlling the motor speed through the inverter circuit, and a DC voltage control circuit receiving the output signal of the speed control circuit for controlling the DC voltage through the converter control circuit in accordance with the output signal. The DC voltage control circuit, when the output of the speed control circuit reaches a predetermined value, outputs a signal to cause the DC voltage to increase or decrease to the converter control circuit. The output of the speed control circuit is a duty ratio signal or a speed deviation signal of the calculated speed value from the speed command value.

9. 发明专利

DE69907537T2 未知
公开(公告)号：DE69907537T2
公开(公告)日：2004-04-01
申请号：DE69907537
申请日：1999-02-11
申请人： HITACHI LTD
发明人： OGAWA TOSHIO , TAKAHASHI MASAAKI , GOUDA MASAHIRO , KAMIMURA NORITAKA , SUZUKI KAZUHIRO , SAEKI JUNICHI , YAMADA KAZUJI , ISHII MAKOTO , TAMBA AKIHIRO
IPC分类号： H01L25/07 , H01L23/433 , H01L25/16 , H01L25/18
摘要： A semiconductor device includes a main circuit part having a semiconductor device formed on an electrode plate (13) of a lead frame and a control circuit part having protective functions, which is integrally molded by a resin mold part (30) into an integral mold structure.

10. 发明专利

DE69907537D1 未知
公开(公告)号：DE69907537D1
公开(公告)日：2003-06-12
申请号：DE69907537
申请日：1999-02-11
申请人： HITACHI LTD
发明人： OGAWA TOSHIO , TAKAHASHI MASAAKI , GOUDA MASAHIRO , KAMIMURA NORITAKA , SUZUKI KAZUHIRO , SAEKI JUNICHI , YAMADA KAZUJI , ISHII MAKOTO , TAMBA AKIHIRO
IPC分类号： H01L25/07 , H01L23/433 , H01L25/16 , H01L25/18
摘要： A semiconductor device includes a main circuit part having a semiconductor device formed on an electrode plate (13) of a lead frame and a control circuit part having protective functions, which is integrally molded by a resin mold part (30) into an integral mold structure.

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