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1. 发明申请

US20170310152A1 UNINTERRUPTIBLE POWER SUPPLY APPARATUS 审中-公开
公开(公告)号：US20170310152A1
公开(公告)日：2017-10-26
申请号：US15517106
申请日：2014-11-27
申请人： TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
发明人： Masaru TOYODA , Masahiro KINOSHITA
IPC分类号： H02J7/34 , H02M5/458 , H02J3/46 , H02J9/06 , H05K7/20 , H02M7/00
CPC分类号： H02J7/34 , H02J3/46 , H02J9/06 , H02J9/062 , H02M5/458 , H02M7/003 , H05K7/2089
摘要： An uninterruptible power supply apparatus includes a converter (5) configured to convert AC power into DC power, and an inverter (10) configured to convert DC power into AC power and supply the converted power to a load (24). The load (24) is configured to receive an AC voltage within a range of allowable input voltage to consume constant AC power. The uninterruptible power supply apparatus has maximum efficiency η when a ratio of load capacity to rated capacity of the uninterruptible power supply apparatus is a predetermined value α. The uninterruptible power supply apparatus further includes a control device (18) configured to control an output voltage of the inverter (10) within the range of allowable input voltage so as to increase the efficiency η, when the ratio of the load capacity to the rated capacity is different from the predetermined value α.

2. 发明申请

US20170012550A1 POWER CONVERSION SYSTEM INCLUDING PLURALITY OF POWER CONVERTERS CONNECTED IN PARALLEL TO LOAD 有权
标题翻译：功率转换系统，包括并联连接的功率转换器的多重性
公开(公告)号：US20170012550A1
公开(公告)日：2017-01-12
申请号：US15000654
申请日：2016-01-19
申请人： Toshiba Mitsubishi-Electric Industrial Systems Corporation
发明人： Shoichi ABE , Masahiro KINOSHITA
IPC分类号： H02M5/458
CPC分类号： H02M5/458 , H02H7/10 , H02J9/00 , H02M1/32 , H02M3/1588 , H02M5/4585 , H02M7/5387 , H02M2001/007 , Y02B70/1466
摘要： An uninterruptible power supply system includes a plurality of uninterruptible power supply devices, and each uninterruptible power supply device includes a conversion circuit, an inversion circuit, a DC positive bus, a DC negative bus, and a capacitor. The uninterruptible power supply system includes a first wiring connected between DC positive buses of two uninterruptible power supply devices, and a second wiring connected between DC negative buses of the two uninterruptible power supply devices. The operation of all uninterruptible power supply devices is stopped in response to an absolute value of a current flowing through a bundle of the first and second wirings exceeding an upper limit value.
摘要翻译：不间断电源系统包括多个不间断电源装置，并且每个不间断电源装置包括转换电路，反相电路，直流正总线，直流负母线和电容器。不间断电源系统包括连接在两个不间断电源装置的直流正总线之间的第一布线和连接在两个不间断电源装置的直流负母线之间的第二布线。响应于流过第一和第二布线的电流的电流的绝对值超过上限值而停止所有不间断电源装置的操作。

3. 发明申请

US20210091662A1 POWER CONVERSION DEVICE AND POWER CONVERSION SYSTEM 有权
公开(公告)号：US20210091662A1
公开(公告)日：2021-03-25
申请号：US16970416
申请日：2019-01-21
申请人： TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
发明人： Yoshihiro TAWADA , Tsuguhiro TANAKA , Masahiro KINOSHITA
IPC分类号： H02M1/32 , H02M7/5395
摘要： A power conversion device includes: a power conversion circuit for converting DC power into AC power; and a controller to generate a control signal for the power conversion circuit based on a control command value and an output voltage of the power conversion circuit. The controller is configured to generate the control signal based on a corrected voltage command value calculated by subtraction correction to decrease a voltage command value when the output voltage of the power conversion circuit is equal to or higher than a predetermined threshold value, and to generate the control signal based on a voltage command value not subjected to the subtraction correction when the output voltage of the power conversion circuit is lower than the threshold value.

4. 发明申请

US20210063494A1 GROUND FAULT DETECTOR AND POWER CONDITIONER 有权
公开(公告)号：US20210063494A1
公开(公告)日：2021-03-04
申请号：US16494452
申请日：2017-07-18
申请人： TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
发明人： Tomoya KATSUKURA , Tomonori UJIIE , Masahiro KINOSHITA
IPC分类号： G01R31/52 , H03K5/24 , H02M7/537
摘要： A power conditioner includes an inverter circuit that converts a DC voltage into an AC voltage, a voltage dividing circuit having one end connected to the positive electrode input terminal and the other end connected to the negative electrode input terminal, and a ground fault detector configured to receive a voltage divided by the voltage dividing circuit as an input voltage signal and to detect an occurrence of a ground fault based on the magnitude of the voltage of the input voltage signal. the ground fault detector emits an AC ground fault detection signal when the input voltage signal includes a first voltage signal having a frequency equal to or higher than a predetermined first frequency and a deviation of the first voltage signal with respect to an AC ground reference potential is equal to or larger than an AC ground fault detection voltage.

5. 发明申请

US20170302105A1 UNINTERRUPTIBLE POWER SUPPLY APPARATUS 审中-公开
公开(公告)号：US20170302105A1
公开(公告)日：2017-10-19
申请号：US15517188
申请日：2014-12-08
申请人： TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
发明人： Masaru TOYODA , Masahiro KINOSHITA
IPC分类号： H02J9/06 , H02M7/217 , H02M5/458 , H02M7/537 , H02M3/158
CPC分类号： H02J9/062 , H02M3/1588 , H02M5/458 , H02M5/4585 , H02M7/217 , H02M7/537 , H02M7/5395 , H02M2001/0054 , Y02B70/1491
摘要： The present uninterruptible power supply apparatus includes a converter (5) configured to convert AC power into DC power; an inverter (10) configured to convert DC power into AC power and supply the converted AC power to a load (24); and a control device (18) configured to control the converter (5) and the inverter (10). The control device (18) is configured to execute a mode selected from a sinusoidal wave output mode and a waveform distortion generation mode. In the sinusoidal wave output mode, an AC voltage (VO) with a sinusoidal waveform and with no waveform distortion is supplied to the load (24). In the waveform distortion generation mode, an AC voltage (VO) with waveform distortion within an allowable range for the load (24) is supplied to the load (24).

6. 发明公开

US20230216429A1 ELECTRIC POWER CONVERSION APPARATUS AND ELECTRIC POWER CONVERSION SYSTEM 审中-公开
公开(公告)号：US20230216429A1
公开(公告)日：2023-07-06
申请号：US17996389
申请日：2020-04-27
申请人： TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
发明人： Masakazu OKAYASU , Issei FUKASAWA , Masahiro KINOSHITA
IPC分类号： H02M7/5387 , G01R31/52
CPC分类号： H02M7/5387 , G01R31/52
摘要： An electric power conversion apparatus includes: an electric power conversion circuit that allows a DC terminal to be connected to a DC power source via a DC bus line, and performs at least one of converting DC power of the DC power source into AC power to output, or converting AC power into DC power to output; a DC switch turned on when the electric power conversion circuit performs electric power conversion; an AC switch provided on a side of the AC terminal, and turned on when the electric power conversion circuit performs the electric power conversion; a DC voltmeter that measures a potential at a predetermined portion, on a side of the DC terminal; a ground connection portion that connects the DC bus line and ground potential; and a control circuit connected to the electric power conversion circuit, the DC switch, the AC switch, and the DC voltmeter.

7. 发明申请

US20200153247A1 POWER CONVERSION DEVICE, POWER SYSTEM AND METHOD OF SUPPRESSING REACTIVE POWER IN POWER SYSTEM 审中-公开
公开(公告)号：US20200153247A1
公开(公告)日：2020-05-14
申请号：US16609601
申请日：2017-07-10
申请人： TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
发明人： Katsuya UMEDA , Tsuguhiro TANAKA , Masahiro KINOSHITA
IPC分类号： H02J3/18 , H02M7/48 , H02J3/46 , H03K17/18 , H03H7/01 , H02M1/10 , H02J3/38
摘要： A power system includes an AC power supply, an AC filter circuit, an AC circuit breaker, and a first switch. The AC filter circuit includes an inductor having one end connected in series to an output end of the AC power supply, and a capacitor having one end receiving a voltage at another end of the inductor. The AC circuit breaker exists between the other end of the inductor and an electric power grid. The first switch switches a state between the one end of the capacitor and a wire connecting the other end of the inductor to the AC circuit breaker, between a connected state and a disconnected state. The AC power supply may be a generator and include a generator control unit controlling the generator. The generator control unit may turn off the first switch when the AC power supply operates in a predetermined standby mode.

8. 发明申请

US20200044581A1 POWER CONVERSION DEVICE AND METHOD FOR OPERATING SAME 审中-公开
公开(公告)号：US20200044581A1
公开(公告)日：2020-02-06
申请号：US16074098
申请日：2016-10-11
申请人： TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
发明人： Tsuguhiro TANAKA , Tatsuaki AMBO , Masahiro KINOSHITA
IPC分类号： H02M7/515
摘要： According to an embodiment of the invention, a power conversion device that includes a power converter, a direct current capacitor, a voltage sensor, a rectifying element, an electromagnetic contactor, and a control circuit is provided. The power converter includes a pair of direct current terminals connected to a direct current power supply, includes multiple alternating current terminals connected to an electric power system of alternating current, converts direct current power input from the direct current power supply into alternating current power, and supplies the alternating current power to the electric power system. The direct current capacitor is connected between the pair of direct current terminals. The voltage sensor detects a voltage value of the direct current capacitor. The rectifying element is provided between the direct current capacitor and the direct current power supply and suppresses a reverse flow of electrical power from the power converter and the direct current capacitor into the direct current power supply. The electromagnetic contactor is connected in parallel with the rectifying element. The control circuit controls operations of the power converter and the electromagnetic contactor. In the case where the voltage value of the direct current capacitor detected by the voltage sensor is a prescribed value or more, the control circuit engages the electromagnetic contactor and supplies active power from the power converter to the electric power system; and in the case where the voltage value of the direct current capacitor detected by the voltage sensor is less than the prescribed value, the control circuit opens the electromagnetic contactor and supplies a reactive power from the power converter to the electric power system.

9. 发明申请

US20220385171A1 CONTROLLER FOR POWER CONVERSION SYSTEM 有权
公开(公告)号：US20220385171A1
公开(公告)日：2022-12-01
申请号：US17754463
申请日：2019-12-10
申请人： TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
发明人： Issei FUKASAWA , Masahiro KINOSHITA
IPC分类号： H02M1/32 , H02M1/42 , H02J3/38
摘要： A controller for a power conversion system includes a determination unit configured to determine whether a current time is in nighttime in an environment of a power converter that is connected to one or both of a direct-current power supply and an alternating-current power supply, and a control unit configured, in a case that the determination unit determines that the current time is in the nighttime, to maintain a switch in a closed state, the switch being provided between the power converter and one of the alternating-current power supply and the direct-current power supply, and to maintain power consumption by a resistor provided in a main circuit inside a housing of the power converter. The power conversion system can suppress lowering of temperature inside a housing without separately including a space heater.

10. 发明申请

US20180076657A1 UNINTERRUPTIBLE POWER SUPPLY DEVICE AND UNINTERRUPTIBLE POWER SUPPLY SYSTEM USING THE SAME 审中-公开
公开(公告)号：US20180076657A1
公开(公告)日：2018-03-15
申请号：US15562075
申请日：2015-04-01
申请人： TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
发明人： Kazuki NISHIMURA , Hiroshi MASUNAGA , Masahiro KINOSHITA
IPC分类号： H02J9/06 , H02M7/12 , H02M7/493 , H02J3/38
CPC分类号： H02J9/06 , H02J3/38 , H02J9/062 , H02M3/158 , H02M5/4585 , H02M7/12 , H02M7/487 , H02M7/493
摘要： An uninterruptible power supply device (U1) includes a converter (40), an inverter (41), a bidirectional chopper (24), and a controller (53). The bidirectional chopper (24) includes first to fourth transistors (Q11-Q14), first to fourth diodes (D11-D14), and first and second, coils (51, 52). In a charging mode, the controller (53) causes the first and fourth transistors (Q11, Q14) to be complementarily turned on and controls the ON period of each of the first and fourth transistors (Q11, Q14) so as to cause respective detected values of first current and second current (11, 12) flowing through the first coil and the second coil (51, 52) to be equal to each other.

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