专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

31. 发明专利

JPS54121919A SINGLE PHASE CAPACITOR MOTOR ENABLING VARIABLE FREQUENCY OPERATION 失效
公开(公告)号：JPS54121919A
公开(公告)日：1979-09-21
申请号：JP2958178
申请日：1978-03-15
申请人： FUJI ELECTRIC CO LTD
发明人： KURITA SHIGEFUMI , TOMITA HIROO , UMEZAWA YASUHIKO
IPC分类号： H02P25/04 , H02P27/06
摘要： PURPOSE:To improve the efficiency of variable frequency operation by applying ignition signals to the single phase inverter and on-off signals to a number of capacitor changeover switches in series to the motor auxiliary winding based on variable setting frequency from a controller. CONSTITUTION:Ignition signals are applied to the single phase inverter INV from the controller CTL to set variable frequency and DC voltage is converted into the AC voltage of variable frequency. For example, the capacitors C1 and C2 with the changeover switches SW1 and SW2 are connected in series to the auxiliary winding Lx which is arranged at a right angle to the main winding lm of the capacitor motor and in parallel to the start and power factor improvement type capacitor C1 and the SW1 and SW2 on-off signals are applied from the controller CTL according to the ignition signals. The capacitor C2 and C3 are also connected in series to the auxiliary winding Lx and the capacitance value is varied. The switch on-off signal is not applied for fixed frequency operation and the start and power factor improvement type capacitor C1 is connected in series to the auxiliary winding Lx.

32. 发明专利

JPS5317948A PROTECTIVE CIRCUIT FOR OVERCURRENT 失效
公开(公告)号：JPS5317948A
公开(公告)日：1978-02-18
申请号：JP9291376
申请日：1976-08-04
申请人： FUJI ELECTRIC CO LTD
发明人： SAWA KUNIHIKO , KURITA SHIGEFUMI , MIKI HIROSHI
IPC分类号： H02H3/087 , H02H3/08
摘要： PURPOSE:To make a protection less expensive for the circuit elements in case of a short-circuit taking place at the load side, by selecting the switching method, provided between a smoothing filter and the load, to a status of off, when the output signal of AC current transformer exceeds the set level.

33. 发明专利

JPH022390B2 失效
公开(公告)号：JPH022390B2
公开(公告)日：1990-01-17
申请号：JP13736881
申请日：1981-09-01
申请人： FUJI ELECTRIC CO LTD
发明人： KURITA SHIGEFUMI , KUROKI KAZUO
IPC分类号： H02M7/537 , H02M7/5387

34. 发明专利

JPS6124898B2 JPS6124898B2 - 失效
公开(公告)号：JPS6124898B2
公开(公告)日：1986-06-13
申请号：JP9291376
申请日：1976-08-04
申请人： Fuji Electric Co Ltd
发明人： SAWA KUNIHIKO , KURITA SHIGEFUMI , MIKI HIROSHI
IPC分类号： H02H3/087 , H02H3/08

35. 发明专利

JPS6040265B2 失效
公开(公告)号：JPS6040265B2
公开(公告)日：1985-09-10
申请号：JP4717379
申请日：1979-04-19
申请人： FUJI ELECTRIC CO LTD
发明人： KURITA SHIGEFUMI
IPC分类号： H02M1/00 , H02M7/48 , H03K17/08

36. 发明专利

JPS6059985A DC MOTOR CONTROL SYSTEM 失效
公开(公告)号：JPS6059985A
公开(公告)日：1985-04-06
申请号：JP16523283
申请日：1983-09-09
申请人： FUJI ELECTRIC CO LTD
发明人： KURITA SHIGEFUMI
IPC分类号： H02P3/14 , H02P7/298
摘要： PURPOSE:To enable to abruptly brake a motor by providing a reversible chopper for supplying an armature current, and a chopper for supplying a field current, and supplying a field current throug the reversible chopper and a capacitor at power interruption time. CONSTITUTION:The armature 3 of a DC motor is connected through a four quadrant operation type chopper CH to a rectifying and smoothing circuit 1, and a field 4 is connected through a chopper which includes a transistor T5. The chopper CH is controlled through a speed regulator 11, a current regulator 12 and a pulse width regulator 13 and the transistor Tr5 is controlled through a field current regulator 15 and a pulse width regulator 16. The rotary energy of a motor is returned through the chopper CH to a smoothing condenser C at power interruption time, thereby enabling to supply the field current. Accordingly, the free running at the power interruption time can be prevented to abruptly brake the minimum time.

37. 发明专利

JPS5927186B2 JPS5927186B2 - 失效
公开(公告)号：JPS5927186B2
公开(公告)日：1984-07-04
申请号：JP15574678
申请日：1978-12-19
申请人： Fuji Electric Co Ltd
发明人： KURITA SHIGEFUMI
IPC分类号： H02M7/44 , H02M7/48 , H02M7/537 , H02M7/5387 , H02P27/06

38. 发明专利

JPS58224525A Harmonic current suppressing circuit 失效
标题翻译：谐波电流抑制电路
公开(公告)号：JPS58224525A
公开(公告)日：1983-12-26
申请号：JP10682782
申请日：1982-06-23
申请人： Fuji Electric Co Ltd
发明人： YANASE TAKAO , KURITA SHIGEFUMI , BANBA TADAYOSHI
IPC分类号： H02J3/01

39. 发明专利

JPS5839283A TIMER CIRCUIT FOR DRIVING BASE OF TRANSISTOR INVERTER 失效
公开(公告)号：JPS5839283A
公开(公告)日：1983-03-07
申请号：JP13736881
申请日：1981-09-01
申请人： FUJI ELECTRIC CO LTD
发明人： KURITA SHIGEFUMI , KUROKI KAZUO
IPC分类号： H02M7/537 , H02M7/5387
摘要： PURPOSE:To obtain accurate time limit of base-ON signals and applying period of reverse bias by determining the time limit of the base-ON signals and the applying time of the reverse bias while being made depend upon reference level voltage supplied to the input side of a comparator. CONSTITUTION:A time limit circuit for ON-delay is formed by a time-constant circuit 31 and a comparator 32. The input side of the time-constant circuit 31 is connected to an input terminal 34 through an AND gate 33, and the output side is connected to the non-inversion input terminal of the comparator 32. The comparator 32 compares the level of signals from the time-constant circuit 31 and a reference voltage level from a reference voltage generator 35. A time limit circuit for reverse bias has the time-constant circuit 31 and a comparator 36. The comparator 36 compares the signal level from the time-constant circuit 31 and the reference voltage level from the reference voltage generator 35. A comparators 39, 40 are formed similarly, transistors 42, 45, 48, 51 are controlled by these output, and base signals and reverse bias signals to a main transistor are outputted.

40. 发明专利

JPS56162978A CONTROLLING CIRCUIT FOR INVERTER 失效
公开(公告)号：JPS56162978A
公开(公告)日：1981-12-15
申请号：JP6462380
申请日：1980-05-15
申请人： FUJI ELECTRIC CO LTD
发明人： KURITA SHIGEFUMI , SUZUKI TATATOMI
IPC分类号： H02M7/48
摘要： PURPOSE:To increase a coefficient of utilization of inverter voltage by a method wherein an inverter is operated as a pulse width modulating inverter during the time when a limiter of a voltage regulator does not work, and it is operated as a square wave inverter when the limiter works. CONSTITUTION:A limiter action detecting circuit 7 consists of a comparator connected to the output of a voltage regulator 3', and the comparator operates when the output of the voltage regulator 3' reaches the limit voltage of a limiter LM and gives a flip-flop F of an inhibiting circuit 8 of the next stage set input. The flip- flop F is locked when the polarity of the next output controlling signals is inverted, and inhibits a logical gate G using pulse width modulating signals as the first input. The inverter works as a pulse width modulating inverter during the time when the limiter LM does not operate, and the inverter works as a square wave inverter when the limiter LM operates.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式