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1. 发明专利

JP2003189500A CONTROLLER OF CHARGING GENERATOR FOR VEHICLE 审中-公开
公开(公告)号：JP2003189500A
公开(公告)日：2003-07-04
申请号：JP2002369164
申请日：2002-12-20
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： TAKAHASHI NAOYUKI , HIKITA SAKAE , KOKUBU SHUICHI
IPC分类号： H02J7/24 , H02J7/16 , H02P9/14 , H02P9/30
摘要： PROBLEM TO BE SOLVED: To solve a problem that an output current capable of responding immediately using an identical controller is different from generator to generator because a generator of various power generations is employed depending on the vehicle. SOLUTION: While paying attention to the relation between the field current flowing through the field winding of a generator having different power generation and the output current therefrom, an immediately increasable amount of field current is temporarily set at a value proportional to the field current before a load is thrown in order to suppress the increasing rate of field current when the load is thrown in. Battery voltage drop can be reduced to a substantially identical level when the electrical load of a vehicle is thrown in even if an identical controller is used. COPYRIGHT: (C)2003,JPO

2. 发明专利

JPH114550A CONTROLLER FOR CHARGING GENERATOR 失效
公开(公告)号：JPH114550A
公开(公告)日：1999-01-06
申请号：JP15327297
申请日：1997-06-11
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： SEKIYA NORITAKA , TAKAHASHI NAOYUKI , MASUMOTO MASATOSHI
IPC分类号： H02J7/16 , H02J7/24 , H02P9/30
摘要： PROBLEM TO BE SOLVED: To prevent an electronic element from heating through a simple arrangement even for a voltage controller provided with a soft switch circuit by lowering the reset signal generation circuit when a field winding is short- circuited thereby decreasing the number of reset times per unit time. SOLUTION: An NOR circuit 60 outputs a PWM frequency alteration signal 60a under a short circuit mode and the PWM frequency alteration signal 60a turns a switch 5509 on during the high level interval to start discharging with a constant current supply 5511. Since the charging time of a capacitor 5507 is prolonged through the operation of the constant current supply 5511, the PWM frequency decreases and thereby the frequency of a reset signal decreases. Consequently, the number of generating times of reset signals per unit time is also decreased and a power transistor 51 can be prevented from heating even if it is subjected to soft switching through a capacitor 61 connected between the base and the emitter of the power transistor 51.

3. 发明专利

JPH10178340A DRIVER FOR MOS TRANSISTOR 失效
公开(公告)号：JPH10178340A
公开(公告)日：1998-06-30
申请号：JP33798296
申请日：1996-12-18
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： TAKAHASHI NAOYUKI , HIKITA SAKAE , MASUNO KEIICHI
IPC分类号： H02P9/30 , H03K17/16 , H03K17/695
摘要： PROBLEM TO BE SOLVED: To realize a driver for a MOS transistor(TR) by which production of radio noise or the like is reduced regardless of a simple and inexpensive configuration. SOLUTION: A forward current flows to a diode 14 when a MOS TR 15 is interrupted, the TR 15 is conductive, the diode 14 is reverse-biased and when the TR 15 is conductive for a reverse recovery time τrr, a short-circuit current is supplied to a battery 2, the diode 14 and the TR 15. An excess current flows to wiring of the battery 2 momentarily, an electromagnetic wave is generated and noise is intruded from an antenna 7 to a radio receiver 6. Then a delay circuit 16 is used to set a drain current of the TR 15 to be in a ramp increase for a longer time than the reverse recovery time τrr of the diode 14 so as to bring the TR 15 from a completely interrupted state into a completely conducting state, then almost no reverse current flows to the diode 14. A short- circuit current flowing through the battery 2, the diode 14 and the TR 15 is prevented and then noise intrusion to the radio receiver 6 is avoided.

4. 发明专利

JP2001161038A VEHICLE POWER SUPPLY SYSTEM 失效
公开(公告)号：JP2001161038A
公开(公告)日：2001-06-12
申请号：JP2000313112
申请日：2000-10-06
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： HIKITA SAKAE , HONDA YOSHIAKI , FUJISHITA MASAKATSU , ISHIDA SAKAE , MASUMOTO MASATOSHI , TAKAHASHI NAOYUKI
IPC分类号： H02J7/14 , H02J7/16 , H02P9/04 , H02P9/30
摘要： PROBLEM TO BE SOLVED: To provide a vehicle power supply system, which can prevent an alarm from operation and protect an automotive battery from damage when an EHC system is used. SOLUTION: A changeover switch 42 is provided between a generator 3 driven by an internal combustion engine 1, and an automotive battery 4 and an EHC system 43, which are provided in parallel with each other. With this constitution, the vehicle power supply system which can prevent the alarm from operation and protect the automotive battery from damage when the EHC system is used can be provided.

5. 发明专利

JPH11234921A CONTROLLER FOR CHARGING GENERATOR FOR VEHICLE 失效
公开(公告)号：JPH11234921A
公开(公告)日：1999-08-27
申请号：JP2950198
申请日：1998-02-12
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： TAKAHASHI NAOYUKI , HIKITA SAKAE , KOKUBU SHUICHI
IPC分类号： H02J7/24 , H02J7/16 , H02P9/14 , H02P9/30
摘要： PROBLEM TO BE SOLVED: To reduce the amount of battery voltage drop to the same level as a generator which generates large power, by adjusting the amount of increase in the control current of a power switch for field current control immediately after electric load application and before actuation of a deenergizing means, based on the state of power generation by a generator. SOLUTION: Generated current to be increased before start of deenergization control at the time of load application is made almost constant regardless of the generated current capacitance of a generator. In a generator different in generated current capacitance, the results of measurement of the amount of increase in field current required to increase the generated current by 10 A immediately after load application and the field current before load application are indicated. In regions with less generated current, the field current and the output current are almost proportional to each other. In regions with larger generated current, the output is not increased even by increasing the field current because the generated current is in proximity to saturation point. For the reason, the generated current can be made almost constant regardless of the state of the generated current by setting the amount of increase in field current to be increased immediately after load application and before start of deenergization control.

6. 发明专利

JPH1084642A CONTROLLER FOR CHARGING GENERATOR OF VEHICLE 失效
公开(公告)号：JPH1084642A
公开(公告)日：1998-03-31
申请号：JP23670696
申请日：1996-09-06
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： TSUCHIYA MASANORI , TAKAHASHI NAOYUKI , MASUNO KEIICHI
IPC分类号： G08B23/00 , H02H3/04 , H02J7/14 , H02J7/16 , H02J7/24 , H02P9/14
摘要： PROBLEM TO BE SOLVED: To control the rise of detected voltage by the detection of a diode of high frequency noise of a radio equipment, etc., to realize a controller of a power generator for a vehicle which can prevent malfunction such as erroneous stop of power generation of a charging generator and erroneous lighting of a charging display lamp. SOLUTION: A battery voltage detecting terminal S is connected to a generated voltage output terminal B via a diode 301 having reverse recovery time of 1μs to 10μs and a resistor 302. A voltage V1 between the resistors 303 and 304 is compared with the reference voltage 307 with a comparator 306 and its output signal controls conductive and non-conductive conditions of a transistor 308 for magnetic field current limitation. The voltage V1 and the reference voltage 310 are compared with the comparator 309. When the voltage V1 exceeds the reference voltage 310, a transistor 311 for driving the charging display lamp becomes conductive to light the charging display lamp 4. When the terminal S is radiated with a radio frequency, forward and backward currents are almost equal because the reverse recovery time of the diode 301 is very slow and thereby the voltage V1 hardly changes to prevent variation of the generated voltage and erroneous lighting of display lamp 4 due to over-voltage detection.

7. 发明专利

JPH08251995A POWER SUPPLY SYSTEM FOR VEHICLE 失效
公开(公告)号：JPH08251995A
公开(公告)日：1996-09-27
申请号：JP16330395
申请日：1995-06-29
申请人： HITACHI LTD , HITACHI CAR ENGINEERING KK
发明人： HIKITA SAKAE , HONDA YOSHIAKI , FUJISHITA MASAKATSU , ISHIDA SAKAE , MASUMOTO MASATOSHI , TAKAHASHI NAOYUKI
IPC分类号： B60R16/02 , H02J7/14 , H02J13/00 , H02P9/30
摘要： PURPOSE: To provide a power supply system for vehicles wherein no alarm is operated when using an EHC system and an on-vehicle battery is never damaged. CONSTITUTION: A change-over switch 42 is provided between a generator 3 driven by an internal combustion engine and an on-vehicle battery 4 provided in parallel with an EHC system 43. Thereby, a power supply system for vehicles wherein no alarm is operated when using the EHC system 43 and the battery 4 is never damaged can be provided.

8. 发明专利

JPH06276695A CONTROLLER OF CHARGING GENERATOR 失效
公开(公告)号：JPH06276695A
公开(公告)日：1994-09-30
申请号：JP5537293
申请日：1993-03-16
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： TAKAHASHI NAOYUKI , TSUCHIYA MASANORI , KOKUBU SHUICHI
IPC分类号： H02J7/24 , H02P9/30
摘要： PURPOSE:To realize, with a simplified circuit configuration, prevention of short- circuit of a power element and initiation of power generation at the time when the short-circuit is recovered by detecting short-circuit of the power element with correlation between a voltage at the point where a field coil and power element are connected and PWM output voltage for controlling power element. CONSTITUTION:If a field coil 3 is short-circuitted, a potential of a voltage deviation circuit output 54a rapidly rises and a current feeding coefficient of PWM output 57a becomes 100%. When a voltage of F terminal voltage 56a becomes equal to a battery voltage in a region where a reset signal 55b becomes low level due to NOR circuits 58, 59, a short-circuit signal 58a becomes high level to prevent breakdown by short-circuit of a power MOS-FET 52. When short-circuit of the field coil 3 is recovered, the power MOS-FET 52 is set in the conductive state if a reset signal 55b is in the high level for the first time after recovery of the short-circuit, the F terminal voltage 56a is set to a value near OV and a short-circuit detecting signal 58a become low level. Accordingly, the power MOS-FET 52 is controlled by an output of the PWM output 57a.

9. 发明专利

JPH0823643A CONTROLLER FOR CHARGING GENERATOR FOR VEHICLE 失效
公开(公告)号：JPH0823643A
公开(公告)日：1996-01-23
申请号：JP15567394
申请日：1994-07-07
申请人： HITACHI LTD , HITACHI CAR ENGINEERING KK
发明人： MASUMOTO MASATOSHI , TAKAHASHI NAOYUKI , KOKUBU SHUICHI
IPC分类号： H02J7/14 , H02J7/24 , H02P9/30
摘要： PURPOSE:To provide a controller for a charging generator of a vehicle which can prevent erroneous operation of a charge lamp when a charging generator is operated in an idling state. CONSTITUTION:A controller for charging generator of a vehicle is constituted in such a way that, when the voltage at an L-terminal drops, the base current of a transistor 86 becomes smaller and the voltage across the collector and emitter of the transistor 86 rises so that the set value of a regulated voltage can rise a little and power generation can be restarted, and then, the voltage at the L-terminal can rise. Therefore, when the voltage at the L-terminal starts to drop due to the idling of the engine, the set value of the regulated voltage rises a little and power generation is started and, as a result, the erroneous operation of a charge lamp can be prevented, since the base current of the transistor 86 becomes smaller and the voltage across the collector and emitter of the transistor 86 rises.

10. 发明专利

JPH07135740A CONTROLLER OF CHARGING GENERATOR FOR CAR 失效
公开(公告)号：JPH07135740A
公开(公告)日：1995-05-23
申请号：JP27926993
申请日：1993-11-09
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： MASUMOTO MASATOSHI , TAKAHASHI NAOYUKI , KOKUBU SHUICHI
IPC分类号： H02J7/14 , H02J7/24 , H02P9/30
摘要： PURPOSE:To lower the current driving capacity of transistors for limiting flowing currents and for a charging pilot lamp and scale down chip size, and to enable a change into a monolithic IC for control at low cost by providing a constant-voltage power supply generating voltage lower than battery voltage as the driving power supply of these transistors. CONSTITUTION:A surge waveform generated at a time when the terminal B of a battery 2 and load 3 are interrupted simultaneously during the power generation of a charging generator 1 and a load dump surge is generated is applied to terminals B, S, L. Surge voltage applied to the terminal B is absorbed by a resistor 24, a capacitor 21 and a Zener diode 25 in a constant-voltage power supply VCC at that time. The base currents of a transistor 12 for limiting flowing currents and a transistor 13 for driving a charging pilot lamp are supplied through resistors 14, 15 respectively from the constant-voltage power supply VCC, and the base currents of these transistors 12, 13 are not increased even when high voltage such as the load dump surge is applied to the terminal B.

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