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91. 发明专利

JPS6022464A GATE CIRCUIT OF SELF-EXTINGUISHING TYPE SEMICONDUCTOR ELEMENT 失效
公开(公告)号：JPS6022464A
公开(公告)日：1985-02-04
申请号：JP12791783
申请日：1983-07-15
申请人： HITACHI LTD
发明人： KUROTAKI YOSHIMI , NARITA HIROSHI
IPC分类号： H02M1/08 , H02M1/06
摘要： PURPOSE:To reduce a gate circuit failure by detecting a load current controlled by a self-extinguishing type semiconductor element and coupling a detection current and an OFF pulse current of a gate controller in reverse polariry as a magnetomotive force of a saturable reactor. CONSTITUTION:A capcitor 3 is connected through a reactor 2 to a DC power source 1, and a parallel circuit of a series circuit of a load resistor 4, an inductance 5 and a DC current detector 20, and a freewheel diode 6 is connected to the positive electrode side of the capacitor 3. The other end of the diode 6 is connected with the anode of a main self-extinguishing type semiconductor element 7, and the cathode of the element 7 is connected to the negative electrode side of the capacitor 3. The gate of the element 7 is connected at the starting end through the end of a winding NOFF of a core 22 of a saturable reactor to the negative electrode side of a reverse bias DC power source 11. A current proportional to the load current of the element 7 is applied through the detector 20 and a converter 21 to the winding NB of the core 22 in reverse polarity to the magnetomotive force of the winding NOFF. Thus, a gate circuit loss can be reduced.

92. 发明专利

JPS5937645B2 JPS5937645B2 - 失效
公开(公告)号：JPS5937645B2
公开(公告)日：1984-09-11
申请号：JP11679077
申请日：1977-09-30
申请人： Hitachi Ltd
发明人： KIWAKI HISAKATSU , KIMURA AKIRA , NARITA HIROSHI , HORIUCHI MICHIMASA , KASAI SHOJI
IPC分类号： B60L15/20 , B60L3/10 , H02P5/68
CPC分类号： B60L3/10 , B60L2200/26 , Y02T10/646 , Y02T10/648 , Y02T10/7258
摘要： The current regulator is used for multi axle electric traction vehicles. The driving motors on the axles are regulated by the difference between reference and motor currents. The traction efficiency is increased and stable running is ensured. Sensors detect the 'sticking' axles and the motor currents of these axles. The drive motors are regulated by the reference and detected motor currents. Axle sticking is sensed by rotating speed detectors. The regulator can be also used in conjunction with dynamic or regenerative braking.

93. 发明专利

JPS59136085A Controller for induction motor 失效
标题翻译：感应电动机控制器
公开(公告)号：JPS59136085A
公开(公告)日：1984-08-04
申请号：JP729083
申请日：1983-01-21
申请人： Hitachi Ltd
发明人： NARITA HIROSHI
IPC分类号： H02P3/18 , B60L7/06 , B60L9/22
CPC分类号： B60L9/22 , B60L2200/26 , B60L2220/12
摘要： PURPOSE:To simplify a preliminarily exciter without using a chopper or the like by supplying an exciting current from a DC power source separately provided to a motor by the switching operation of the arms of the respective phase of a polyphase inverter at the generating brake time. CONSTITUTION:When an induction motor IM for driving an electric railcar is controlled by an inverter having GTO1-GTO6 and freewheel diodes D1-D6, a preliminary exciter EX which has a battery EB, a reactor LE and diodes DE1- DE3 is provided, and connected to the anodes of the GTO2, GTO4, GTO6 of the phase arms of the inverter. Accordingly, a contactor is opened, currents of positive half wave 2-phase and negative half 1-phase are branched from a battery EB by the switching operation at the generating brake time by the chopper CH operation as a preliminariy exciting current, an exciter EX can be extremely simplified.
摘要翻译：目的：通过在生成制动时间通过多相逆变器的各相的臂的切换动作，通过从分别设置在电动机上的直流电源提供励磁电流来简化预励磁器，而不使用斩波器等。构成：当用具有GTO1-GTO6和续流二极管D1-D6的逆变器控制用于驱动电气轨道车辆的感应电动机IM时，设置有具有电池EB，电抗器LE和二极管DE1-DE3的预励磁器EX，以及连接到逆变器的相臂的GTO2，GTO4，GTO6的阳极。因此，接触器断开，正半波两相和负半相1相的电流通过在斩波器CH操作下的生成制动时间的开关动作从电池EB分支为初始励磁电流，励磁机EX 可以极其简化。

94. 发明专利

JPS5968025A Load current controller 失效
标题翻译：负载电流控制器
公开(公告)号：JPS5968025A
公开(公告)日：1984-04-17
申请号：JP17830682
申请日：1982-10-13
申请人： Hitachi Ltd
发明人： KUROTAKI YOSHIMI , NARITA HIROSHI
IPC分类号： G05F1/10 , H02M3/135
CPC分类号： H02M3/135
摘要： PURPOSE:To make a conduction ratio and a load current proportional by turning on a semiconductor switching element which is used as a snubber circuit when the conduction ratio is large and turns off the element when the conduction ratio is small and a load state decreases below a specific value. CONSTITUTION:The snubber circuit 101 connected to a self-extinguishing type switching element 5 in parallel includes the semiconductor switching element 10 in parallel across the series circuit of a resistance 7 and a diode 9, and a capacitor 8 is connected in series with them. Then, a load current IL is detected by a current detector 11. When the conduction ratio gamma of the element 5 is large and the load current IL is greater than the set current value ILO of a signal generating circuit 12, the circuit 12 generates an output signal by the output of the detector 11 to supply an ignition signal to the element 10. When the conduction ratio gamma is small and the current IL is less than ILO, on the other hand, the output signal of the circuit 12 is not generated by the output of the detector 11, so the element 10 turns off. Consequently, the load current IL is proportional to the conduction ratio gamma even when the gamma is small.
摘要翻译：目的：通过接通导通比较大时用作缓冲电路的半导体开关元件来使导通比和负载电流成比例，并且当导通率小且负载状态下降到低于a时，元件断开具体价值。构成：并联连接到自熄型开关元件5的缓冲电路101包括并联在电阻7的串联电路和二极管9上的半导体开关元件10，并且电容器8与它们串联连接。然后，电流检测器11检测负载电流IL。当元件5的导通比γ大并且负载电流IL大于信号发生电路12的设定电流值ILO时，电路12产生输出信号通过检测器11的输出，以将点火信号提供给元件10.另一方面，当导通比γ小且电流IL小于ILO时，不产生电路12的输出信号通过检测器11的输出，因此元件10关断。因此，即使伽马值较小，负载电流IL也与导通比γ成正比。

95. 发明专利

JPS58195404A Controller for electric motor vehicle 失效
标题翻译：电动马达控制器
公开(公告)号：JPS58195404A
公开(公告)日：1983-11-14
申请号：JP7547582
申请日：1982-05-07
申请人： Hitachi Ltd
发明人： NARITA HIROSHI
IPC分类号： B60L15/28 , B60L7/12 , H02P7/298
CPC分类号： B60L7/12 , B60L2200/26 , Y02T10/7258
摘要： PURPOSE:To shift from a power drive to a brake of an electric motor vehicle without interrupting a control by controllig a shunt field current with the same poles as those at the power drive time, at the brake time, controlling an armature current under the control of a shunt field current at a high speed time and under the both controls of the shunt field current and a chopper at intermediate and low speed times. CONSTITUTION:A contactor PK1 and series units P1, P2 of a power drive and brake shifter are closed at the forward power drive time, a shunt field current is controlled by ON or OFF of a gate turn-off thyristor GTO4, and an armature current is controlled by ON or OFF of a chopper GTOCH. A field current IP is increased under the control of the GTO4 to flow a regenerative current. The chopper GTOCH stops the ON or OFF control, opens the series units P1, P2, and closes series units B1, B2. When a motor speed is decelerated so that an armature induced voltage becomes lower than the power source voltage, the ON or OFF control of the chopper GTOCH is added.
摘要翻译：目的：通过控制与动力驱动时间相同的极点的并联励磁电流，不用中断控制就可以从电动车辆转向电动车辆的制动器，在制动时，控制电枢电流在控制下在高速时间和分流电流的两个控制下的分流场电流和中间和低速时间的斩波器。构成：功率驱动器和制动器移位器的接触器PK1和串联单元P1，P2在正向功率驱动时间闭合，分流场电流由栅极截止晶闸管GTO4的ON或OFF控制，电枢电流由斩波器GTOCH的ON或OFF控制。在GTO4的控制下，场电流IP增加以流过再生电流。斩波器GTOCH停止ON或OFF控制，打开系列单元P1，P2，并关闭串联单元B1，B2。当电机速度减速使得电枢感应电压变得低于电源电压时，增加斩波器GTOCH的ON或OFF控制。

96. 发明专利

JPS5828820B2 失效
公开(公告)号：JPS5828820B2
公开(公告)日：1983-06-18
申请号：JP1763878
申请日：1978-02-20
申请人： HITACHI LTD
发明人： HORIUCHI MICHIMASA , NARITA HIROSHI , IBAMOTO MASAHIKO , ROKUTAN HIDEAKI
IPC分类号： H02M3/135

97. 发明专利

JPS5872391A CONTROLLER FOR CHOPPER 失效
公开(公告)号：JPS5872391A
公开(公告)日：1983-04-30
申请号：JP16877381
申请日：1981-10-23
申请人： HITACHI LTD
发明人： HORIUCHI MICHIMASA , SATOU HIROSHI , NARITA HIROSHI , SUGIMOTO SHIYUNICHIROU
IPC分类号： B60L15/28 , H02P7/29
摘要： PURPOSE:To always utilize the controlling range of a chopper to the maximum limit by controlling next ON signal not to input within commutation time determined from the current value at the time of applying an OFF signal. CONSTITUTION:Sigals obtained by converting a motor current IM and a command value IP to digital values are inputted according to an interrupt signal at each operating period of a chopper from an oscillator OSC to calculate a deviation epsilon, and a current flowing time DUTY is outputted in response to the deviation. On the other hand, the commutating time in response to the digital value of the motor current IM is read out from a data table, and the maximum current flowing time obtained by subtracting the chopper period TCH by the read-out commutating time is outputted. In this manner, the controlling range of the chopper can be utilized most effectively irrespective of the motor current with a simple structure.

98. 发明专利

JPS5820523B2 失效
公开(公告)号：JPS5820523B2
公开(公告)日：1983-04-23
申请号：JP5131975
申请日：1975-04-30
申请人： HITACHI LTD
发明人： NARITA HIROSHI
IPC分类号： H02P3/08 , B60L7/00 , B60L7/22

99. 发明专利

JPS5818842B2 失效
公开(公告)号：JPS5818842B2
公开(公告)日：1983-04-15
申请号：JP1345275
申请日：1975-02-03
申请人： HITACHI LTD
发明人： ARAI SHINICHI , FURUYAMA YOSHIO , ODASAWA NOBUAKI , NARITA HIROSHI
IPC分类号： H02P3/12 , B60L7/04

100. 发明专利

JPS5846895A INVERTER CONTROLLING SYSTEM FOR INDUCTION MOTOR 失效
公开(公告)号：JPS5846895A
公开(公告)日：1983-03-18
申请号：JP14396881
申请日：1981-09-14
申请人： HITACHI LTD
发明人： IBAMOTO MASAHIKO , NARITA HIROSHI
IPC分类号： H02P5/74 , H02P7/74
摘要： PURPOSE:To reduce the capacity of a smoothing capacitor in a filter circuit by a method wherein a phase difference is selected between frequency signals supplied to inverters in response to a selection of carrier frequencies for pulse width modulation. CONSTITUTION:The system is constituted of pulse width modulation inverters 4A and 4B receiving power from a common filter circuit 3, induction motors 5A- 5H controlled by the respective inverters 4A and 4B, voltage control means 11A and 11B for controlling the inverter output voltages, and a frequency control means 9 for controlling inverter operating frequencies in response to revolving speeds. A phase shift circuit 28 is added to said system which provides a phase shift to frequency signals being fed to each inverter from frequency control means 11A and 11B, while said circuit 28 switches over the magnitude of the phase difference in accordance with the carrier frequency switching over of the pulse width modulation. The system being thus constructed, the ripple frequency in the output current from the filter circuit 3 is larger, realizing a smoothing capacitor 7 effectively functioning with a reduced capacity in the filter circuit 3.

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