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41. 发明专利

JPS609339A ENERGY TRANSFERRING DEVICE BETWEEN COILS 失效
公开(公告)号：JPS609339A
公开(公告)日：1985-01-18
申请号：JP11960883
申请日：1983-06-29
申请人： MITSUBISHI ELECTRIC CORP
发明人： TAKEDA MASATOSHI
IPC分类号： H02J15/00

42. 发明专利

JPS58255B2 失效
公开(公告)号：JPS58255B2
公开(公告)日：1983-01-06
申请号：JP8118676
申请日：1976-07-07
申请人： MITSUBISHI ELECTRIC CORP
发明人： TAKEDA MASATOSHI
IPC分类号： G05F1/70 , H02J3/18

43. 发明专利

JPS56157223A CONTROL CIRCUIT FOR REACTIVE POWER COMPENSATING DEVICE 失效
公开(公告)号：JPS56157223A
公开(公告)日：1981-12-04
申请号：JP6014780
申请日：1980-05-07
申请人： JAPAN NATIONAL RAILWAY , MITSUBISHI ELECTRIC CORP
发明人： FUJIE HIROSHI , TAKEDA MASATOSHI
IPC分类号： H02J3/18 , G05F1/70

44. 发明专利

JPS5156681A 失效
公开(公告)号：JPS5156681A
公开(公告)日：1976-05-18
申请号：JP13059374
申请日：1974-11-13
申请人： MITSUBISHI ELECTRIC CORP
发明人： TAKEDA MASATOSHI
IPC分类号： G01R21/00 , G01R21/06

45. 发明专利

JP2001197680A APPARATUS AND METHOD FOR SWITCHING POWER SYSTEM 失效
公开(公告)号：JP2001197680A
公开(公告)日：2001-07-19
申请号：JP2000001621
申请日：2000-01-07
申请人： MITSUBISHI ELECTRIC CORP
发明人： TAKEDA MASATOSHI , KAMIYAMA ISAO
IPC分类号： H02J9/06 , H02J3/00 , H02J3/04 , H03K17/725
摘要： PROBLEM TO BE SOLVED: To provide an apparatus and a method for switching power systems that enables, if a power system is disturbed, changing over to another power system, without power interrupt and to minimize loss produced during energization and thus significantly reducing the operating cost. SOLUTION: When power supply to a load 5 connected with a connecting point among first and second mechanical bypass switches 10 and 12 connected with first and second power systems 1 and 2, respectively, and a semiconductor switch 8 parallel-connected with the second bypass switch 12 is changed from the first power system to the second power system, the first bypass switch 10 is opened and further the semiconductor switch 8 is brought into conduction, to shunt the current of the first bypass switch 10 to the semiconductor switch 8. Thereafter, the second bypass switch 12 is closed to change power supply to the load 5 over to the second power system 2.

46. 发明专利

JPH05303437A 失效
公开(公告)号：JPH05303437A
公开(公告)日：1993-11-16
申请号：JP10796492
申请日：1992-04-27
申请人： MITSUBISHI ELECTRIC CORP
发明人： TAKEDA MASATOSHI
IPC分类号： G05F1/70 , H02J3/18 , H02M7/493 , H02M7/515 , H02M7/48
摘要： PURPOSE:To obtain a reactive power compensating device capable of reducing the operation loss of an self-exciting type inverter at the time of no load or light load. CONSTITUTION:The device is provided with plural self-exciting type inverters 7a, 7b connected to an AC bus 2 together with a load 3 to convert DC voltage into AC voltage and output the AC voltage to the bus 2, a reactive power detecting circuit 6 for detecting the reactive power of the load 3 and outputting a reactive current IQ corresponding to the reactive power, a level comparator circuit 16 for comparing the level of the current IQ with a previously set comparing reference value I2, and a selecting means constituted of AND circuits 19a, 19b for selecting the number of necessary inverters out of plural inverters 7a, 7b in accordance with the level comparison result.

47. 发明专利

JPH02114307A CONTROL CIRCUIT FOR STATIC TYPE REACTIVE POWER COMPENSATING DEVICE 失效
公开(公告)号：JPH02114307A
公开(公告)日：1990-04-26
申请号：JP26856888
申请日：1988-10-25
申请人： MITSUBISHI ELECTRIC CORP , TOKYO ELECTRIC POWER CO
发明人： TAKEDA MASATOSHI , MAEDA TAKAFUMI
IPC分类号： H02J3/18 , G05F1/70
摘要： PURPOSE:To allow a reactive power compensating device to sufficiently display the overvoltage suppressing effect of a power system without suddenly reducting current even in the case of controlling a thyristor device in an overload area by varying the time constant of a delay circuit in accordance with the operation state of a constant current control circuit. CONSTITUTION:During the period of operation of a constant current control circuit 100 for suppressing the overload of a static type reactive power compensating device 17 for regulating the reactive power of the power system by means of the thyristor 3, the time constants of input resistors R0, R1 and feedback resistors R2, R3 in an operational amplifier 19 including a delay element e.g. for a primary delay circuit 7 are changed without changing steady gain. Or, the size of a feedback capacitor C in the amplifier 19 is changed without changing the steady gain and the function is purified. Consequently, the reactive power compensating circuit can be allowed to sufficiently display its overvoltage suppressing function.

48. 发明专利

JPH0150177B2 失效
公开(公告)号：JPH0150177B2
公开(公告)日：1989-10-27
申请号：JP8414681
申请日：1981-05-29
申请人： MITSUBISHI ELECTRIC CORP
发明人： TAKEDA MASATOSHI
IPC分类号： G05F1/24 , H02J3/12

49. 发明专利

JPH01259728A VOLTAGE COMPENSATOR 失效
公开(公告)号：JPH01259728A
公开(公告)日：1989-10-17
申请号：JP8670088
申请日：1988-04-07
申请人： MITSUBISHI ELECTRIC CORP
发明人： TAKEDA MASATOSHI
IPC分类号： H02J3/12 , G05F1/66
摘要： PURPOSE:To maintain the voltage at a load connecting point constant, by temporarily discharging energy stored in a capacitor at DC side of an inverter upon droppage of source voltage. CONSTITUTION:A control circuit 13 receiving voltage signals Va, Vb, Vc and current signals Ia, Ib, Ic from the output terminal 14 of a voltage compensator 15 controls an inverter 9 to maintain the voltage at the output terminal 14 at a constant level. Since the voltage of a capacitor 10 is controlled through a control circuit not shown to a constant level, effective current flowing steadily through the inverter 9 is brought to zero and only reactive current flows. Consequently, the voltage at the output terminal 14 is maintained constant, under steady state, by the reactive current flowing through the inverter 9. When the voltage at the output 14 drops temporarily, the control circuit 13 functions instantaneously to maintain the voltage at the output terminal 14 constant. Consequently, charges stored in the capacitor 10 are discharged and effective power is fed from the inverter 9 to a load 3, thus maintaining the output voltage constant.

50. 发明专利

JPS63261407A POWER SUPPLY CIRCUIT 失效
公开(公告)号：JPS63261407A
公开(公告)日：1988-10-28
申请号：JP9582687
申请日：1987-04-17
申请人： MITSUBISHI ELECTRIC CORP
发明人： TAKEDA MASATOSHI
IPC分类号： G05F1/10
摘要： PURPOSE:To switch 1st and 2nd power sources without generating service interruption by connecting both the power sources through a semiconductor switch, and when the power supply voltage of any one of the power sources is dropped, conducting the switch. CONSTITUTION:Power is supplied from the 1st power source 1 to a load 3 through a switch 3 and power is also supplied from the 2nd power source 2 to a load 7 through a switch 4. At the time of normal state, voltage at a point A is equal to that at a point B and the voltage is inputted to a control circuit 11 through voltage transformers 10a, 10b, but no output is generated from the circuit 11. When abnormality is generated in the power source 1 and the voltage at the point A is dropped, the circuit 11 generates a gage ignition signal to ignite thyristors 8a, 8b and to connect a thyristor switch 9. Since power is supplied from the power supply 2 to the load 6 through the switch 9, the voltage is instantaneously recovered and to service interruption can be attained at the point A.

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