WO2017104270A1 - 車両用制御装置 - Google Patents
車両用制御装置 Download PDFInfo
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- WO2017104270A1 WO2017104270A1 PCT/JP2016/081656 JP2016081656W WO2017104270A1 WO 2017104270 A1 WO2017104270 A1 WO 2017104270A1 JP 2016081656 W JP2016081656 W JP 2016081656W WO 2017104270 A1 WO2017104270 A1 WO 2017104270A1
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- WIPO (PCT)
- Prior art keywords
- circuit breaker
- vehicle control
- control device
- voltage
- connection point
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- 239000003990 capacitor Substances 0.000 claims abstract description 31
- 238000009499 grossing Methods 0.000 claims abstract description 26
- 238000007599 discharging Methods 0.000 claims description 12
- 238000003745 diagnosis Methods 0.000 description 44
- 230000001012 protector Effects 0.000 description 19
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- 238000012544 monitoring process Methods 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
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- 230000000694 effects Effects 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
- H02H3/044—Checking correct functioning of protective arrangements, e.g. by simulating a fault
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/06—Arrangements for supplying operative power
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
- H02H11/002—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of inverted polarity or connection; with switching for obtaining correct connection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/05—Details with means for increasing reliability, e.g. redundancy arrangements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for DC mains or DC distribution networks
- H02J1/14—Balancing the load in a network
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other DC sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other DC sources, e.g. providing buffering using capacitors as storage or buffering devices
Definitions
- the present invention relates to a vehicle control device.
- Patent Document 1 Japanese Patent Laid-Open No. 2004-133830 states that “the first relay relay is instructed to switch off the first power supply relay for a while during the operation of the inverter, and the first power supply relay is turned on based on the change in the intermediate voltage while the first power supply relay is off. It detects “off failure of the two power relay”.
- the time constant of the intermediate voltage detector (30) that detects the intermediate voltage (V1) between the first power relay (21) and the second power relay (22) is about 100 us (micro second).
- the power steering system can be diagnosed within 15 ms.
- some other systems must guarantee the accuracy of the current flowing through the load even during diagnosis, which may require higher-speed diagnosis, and there is a problem that the technique of Patent Document 1 cannot be applied. is there.
- An object of the present invention is to provide a vehicle control device capable of diagnosing a breaker that cuts off a current at high speed while guaranteeing accuracy of a current flowing through the load during operation of the load.
- the present invention provides a smoothing capacitor connected in parallel to a load, a first capacitor that is connected in series from a power supply device to a first connection point of the load and the smoothing capacitor, and cuts off a current.
- the main function is a drive circuit that controls the current flowing through the linear solenoid valve for speed change control
- the safety device is a power cutoff circuit that blocks the current flowing through the linear solenoid valve.
- FIG. 3 shows a circuit configuration of an AT C / U as a comparative example.
- a plurality of drive circuits (10, 11, 12) for controlling the current flowing through the linear solenoid valve (13) are mounted in the AT C / U (1) using the battery (2) as a power source, and are installed in the microcomputer (5).
- the current flowing through the linear solenoid valve (13) is controlled by current feedback control by a program to be mounted.
- (3b) a reverse connection protector (4a) that cuts off the current flowing from the ground side of the C / U (1) to the battery positive side when the battery is reversely connected, and an upstream power source of the drive circuits (10, 11, 12)
- a smoothing capacitor (8) for stabilizing (51) and a voltage monitor circuit (15, 16) for monitoring the voltage of the upstream power supply (51) of the drive circuit are mounted.
- the circuit breaker (3a) is in an ON state, and the reverse connection protector (4a) is always in an ON state when power is supplied due to the circuit configuration.
- the diagnosis of the circuit breaker (3a) is performed before the C / U is started and the control is shifted to the actual control or before the actual control is ended and the power of the C / U (1) is cut off. Time diagnosis is not performed.
- the current flowing through the linear solenoid valve (13) is controlled by current feedback control by a program that is mounted and installed in the microcomputer (5).
- the drive circuit receives a signal from the microcomputer (5) and performs PWM switching with PWM switching elements (10a, 10b), and a free wheel diode (11a) for free-wheeling current when the PWM switching elements (10a, 10b) are OFF. 11b) and current detection means (12a, 12b) for detecting the current flowing through the linear solenoid valve and passing the signal to the microcomputer (5).
- the number of drive circuits and linear solenoid valves (13) differs depending on the application, and a plurality of them are usually mounted.
- the smoothing capacitor (8) is connected in parallel to linear solenoid valves (loads: 13a, 13b).
- the circuit breaker (first circuit breaker: 3a) and reverse connection protector (second circuit breaker: 4a) that cut off the current are supplied from the battery (power supply device: 2) to the linear solenoid valves (13a, 13b) and the smoothing capacitor ( 8) connected in series to the first connection point (P1).
- a discharging switching element for discharging a charge at the intermediate point (50) in response to a signal from the microcomputer (5).
- a discharge resistor (7) are mounted, and a current limiting resistor (14) is mounted between the intermediate point (50) and the input section of the microcomputer (5).
- the input unit of the microcomputer (5) is assumed to be a port input for determining Hi / Lo.
- the discharge switching element (6) and the discharge resistor (7) constitute a discharge device (DU).
- the discharge device (DU) is connected to the second connection point (P2) between the circuit breaker (first circuit breaker: 3a) and the reverse connection protector (second circuit breaker: 4a). The charge of (P2) is discharged.
- the discharge device (DU) has a switching element (6) for turning on / off the connection between the second connection point (P2) and the ground. Further, the discharge device (DU) includes a resistor (7) that connects the second connection point (P2) and the ground.
- the charge stored at the intermediate point (50) at this time is mainly the drain-source capacitance, drain-gate capacitance, gate-source capacitance of the FET or IPD which is the circuit breaker (3a) or reverse connection protection device (4a). It is. Since these capacitances are larger for FETs and IPDs that correspond to large currents, in order to change the voltage at the intermediate point (50) at a high speed equivalent to zero volts, it is connected to the intermediate voltage (V1) in Patent Document 1.
- the discharge switching element (6) according to the embodiment of the present invention is required instead of the circuit configuration having the time constant.
- “high speed” of “equal to zero volts at high speed” refers to 10 us or less in time.
- a time constant of about 100 us is a limit in the actual use range because a resistor and a capacitor are used to remove the charge of the intermediate voltage (V1).
- V1 intermediate voltage
- GND ground-to-drain diode
- the voltage input to the microcomputer (5) via the current limiting resistor (14) also becomes zero volts at the same time, and the detection threshold voltage or less of the microcomputer (5) is detected.
- the circuit breaker (3a) is normally turned off.
- the input section of the microcomputer (5) is a high-speed AD converter for satisfying the diagnosis within 10 us of the estimated diagnosis time.
- the diagnosis threshold voltage in FIG. 2 can be finely set by the microcomputer (5).
- Hi / If a general-purpose port input for instantaneously detecting Lo is used, Hi / Lo can be determined within 1 us, but only the set voltage determined by the microcomputer (5) can be selected as the diagnostic threshold voltage in FIG. However, since the general-purpose port can determine Hi / Lo at a very high speed as compared with the AD converter, it is preferable to use the general-purpose port in the embodiment of the present invention.
- the microcomputer (5) functions as a voltage measuring unit that measures the voltage at the second connection point (P2).
- the microcomputer (5) is the second measured during the period when the circuit breaker (first circuit breaker: 3a) and the reverse connection protector (second circuit breaker: 4a) are turned off and the discharge device (DU) is turned on.
- the voltage at the connection point (P2) exceeds the threshold value, it functions as a diagnostic unit for diagnosing that the breaker (3a) is malfunctioning.
- the microcomputer (5) may output that the breaker (3a) is broken to an external device such as a display device.
- the presence of the discharge resistor (7) is important for removing the charge at the intermediate point (50) and for performing diagnosis at the voltage at the intermediate point (50).
- the discharging resistor (7) has a role of preventing an overcurrent from flowing through the discharging switching element (6) composed of an FET or an IPD during discharging.
- the voltage at the intermediate point (50) is a partial pressure between the ON resistance value of the breaker (3a) and the discharge resistor (7). Therefore, it is important to set the resistance value of the discharging resistor (7) so that the voltage at the intermediate point (50) is higher than the diagnosis threshold voltage when the breaker (3a) is ON-failed.
- the discharge switching element (6) is preferably an IPD with an overcurrent protection function.
- the discharge switching element (6) is turned off, and the circuit breaker (3a) and reverse connection protection machine (4a) are turned on to complete the diagnosis.
- the current control to the linear solenoid valve (13) is performed even during diagnosis of the circuit breaker (3a)
- the diagnosis time is as short as 10 us or less
- the voltage drop of the upstream power supply (51) of the drive circuit is reduced. It hardly occurs and does not affect the accuracy of the control current.
- the voltage drop of the upstream power supply of the drive circuit is assumed to be 0.1 V or less, and the current accuracy of the control current flowing through the linear solenoid valve is assumed to be ⁇ 10 mA or less.
- the accuracy of current to the load of the linear solenoid valve (13) is demanded by the voltage of the upstream power supply (51) of the drive circuit, so that the current accuracy of the control current flowing through the linear solenoid valve (13) is not affected. It is important to reduce the voltage fluctuation during diagnosis. By increasing the capacity of the smoothing capacitor (8), or by using a method in which the diagnosis time of the circuit breaker (3a) is short, fluctuations in the upstream power supply (51) of the drive circuit can be reduced.
- the diagnosis timing of the circuit breaker (3a) is preferably the timing at which the diagnosis has the least influence on the actual control.
- the total control current flowing through the plurality of linear solenoid valves (13) is the smallest. It is better to make a diagnosis at the time of combination. This is because the smaller the total current flowing through the load, the smaller the voltage drop of the upstream power supply (51) of the drive circuit that occurs at the time of diagnosis.
- the diagnosis of the circuit breaker (3a) is performed every 100 ms, for example, in order to ensure the safety in the application, once diagnosis within the exposure time from the occurrence of the element failure to the vehicle dangerous event It may be used to implement.
- the exposure time here is assumed to be FTTI (Fault Tolerant Time Interval) used in ISO26262.
- the power input smoothing capacitor (9) has a role of suppressing fluctuations in the current flowing in the power supply line when the circuit breaker (3a) is turned on / off, and can be expected to suppress noise emission.
- the capacitor in order to perform diagnosis of the breaker (3a) at high speed, the capacitor is important for noise emission suppression because the breaker (3a) and the reverse connection protector (4a) are switched at high speed.
- a large-capacity aluminum electric field capacitor or the like is mainly used, but a ceramic capacitor with a small series equivalent resistance or small series equivalent inductance is mounted in parallel with the aluminum electrolytic capacitor to suppress noise radiation. May be.
- FIG. 5 is a configuration diagram of the C / U according to the second embodiment of the present invention.
- the difference from the first embodiment is that there is no discharge switching element (6), and instead only the discharge resistor (7) is mounted.
- the first embodiment controls and discharges the discharge switching element (6).
- the second embodiment assumes a passive discharge only by the discharge resistor (7).
- Diagnostic sequence is the same as in the first embodiment.
- the resistance value of the discharge resistor (7) it is possible to remove the electric charge at the intermediate point (50) as quickly as possible by setting it to a low resistance within a range that can withstand the heat generated by the power consumption. Since there is no discharge switching element (6) as in the first embodiment, the charge at the intermediate point (50) cannot be removed as fast as in the first embodiment. As a result, the diagnosis time of the circuit breaker (3a) is shorter than that in the first embodiment. Also grows.
- the circuit configuration for monitoring the intermediate potential (V1) voltage is faster in the circuit configuration of the second embodiment shown in FIG. Since it can be removed, the diagnosis time of the circuit breaker (3a) can be increased as compared with Patent Document 1.
- the present invention is not limited to the above-described embodiment, and includes various modifications.
- the above-described embodiment has been described in detail for easy understanding of the present invention, and is not necessarily limited to one having all the configurations described.
- a part of the configuration of an embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of an embodiment.
- each of the above-described configurations, functions, and the like may be realized by hardware by designing a part or all of them with, for example, an integrated circuit.
- Each of the above-described configurations, functions, and the like may be realized by software by interpreting and executing a program that realizes each function by the processor.
- Information such as programs, tables, and files for realizing each function can be stored in a recording device such as a memory, a hard disk, or an SSD (Solid State Drive), or a recording medium such as an IC card, an SD card, or a DVD.
- the discharge control means controls the discharge means in a state in which the power supply and the current are cut off by the power cut-off means and the current cut-off means during operation of the load.
- a power shut-off means disposed between the power source and the load; A smoothing capacitor disposed between the power shut-off means and the load; A current interrupting means disposed between the power shutoff means and the smoothing capacitor, and capable of interrupting a current in a direction from the smoothing capacitor toward the power shutoff means; Measuring means for measuring an intermediate voltage between the power cutoff means and the current cutoff means, For a vehicle for diagnosing the power shut-off means by the measuring means measuring the intermediate voltage in a state in which the power and the current shut-off means are shut off by the power shut-off means and the current shut-off means during operation of the load Control device.
- a vehicle control device having a semiconductor switch element having an overcurrent protection function in the switch element used for the discharging means.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
Description
初めに、安全装置のリアルタイム診断が困難な理由を以下、AT用C/Uを比較例に挙げて説明する。AT用C/Uの場合、主機能は変速制御するためのリニアソレノイドバルブに流れる電流を制御する駆動回路であり、安全装置はリニアソレノイドバルブに流れる電流を遮断する電源遮断回路となる。
図1は、本発明の第1の実施形態によるC/Uの構成図である。以下、図1に従って各符号について説明していく。
図5は、本発明の第2の実施形態によるC/Uの構成図である。第1実施形態との違いは、放電用スイッチング素子(6)がなく、代わりに放電用抵抗(7)のみが実装されており、第1実施形態は放電用スイッチング素子(6)の制御と放電用抵抗(7)によるアクティブな放電に対して、第2実施形態は放電用抵抗(7)のみによるパッシブな放電を想定している。
前記電源遮断手段(3a)と前記負荷(13)との間に配置される平滑コンデンサ(8)と、
前記電源遮断手段(3a)と前記平滑コンデンサ(8)との間に配置され、前記平滑コンデンサ(8)から前記電源遮断手段(3a)へ向かう方向の電流を遮断可能な電流遮断手段(4a)と、
前記電源遮断手段(3a)及び前記電流遮断手段(4a)の間の中間電圧を測定する測定手段(5、14)と、
前記電源遮断手段(3a)及び前記電流遮断手段(4a)の間の電荷を放電させる放電手段(6、7)と、
前記放電手段(6、7)を制御する放電制御手段(5、54)と、
を備える車両用制御装置。
前記電源遮断手段と前記負荷との間に配置される平滑コンデンサと、
前記電源遮断手段と前記平滑コンデンサとの間に配置され、前記平滑コンデンサから前記電源遮断手段へ向かう方向の電流を遮断可能な電流遮断手段と、
前記電源遮断手段及び前記電流遮断手段の間の中間電圧を測定する測定手段と、を備え、
前記負荷の動作中に前記電源遮断手段及び前記電流遮断手段によって前記電源及び前記電流が遮断された状態で、前記測定手段が前記中間電圧を測定することにより、前記電源遮断手段を診断する車両用制御装置。
2 バッテリ
3a 遮断機
3b 遮断機駆動回路
4a 逆接保護機
4b 逆接保護機駆動回路
5 マイコン
6 放電用スイッチング素子
7 放電用抵抗
8 平滑コンデンサ
9 電源入力部平滑コンデンサ
10a PWM用スイッチング素子
10b PWM用スイッチング素子
11a フリーホイールダイオード
11b フリーホイールダイオード
12a 電流検出手段
12b 電流検出手段
13a リニアソレノイドバルブ
13b リニアソレノイドバルブ
14 電流制限抵抗
15 電圧モニタ回路抵抗1
16 電圧モニタ回路抵抗2
50 中間点
51 駆動回路の上流電源
52 遮断機制御信号
53 逆接保護機制御信号
54 放電用スイッチング素子制御信号
Claims (8)
- 負荷に並列接続される平滑コンデンサと、
電源装置から前記負荷と前記平滑コンデンサとの第1の接続点へ直列接続され、電流を遮断する第1の遮断機及び第2の遮断機と、
前記第1の遮断機と前記第2の遮断機との第2の接続点に接続され、前記第2の接続点の電荷を放電する放電装置と、
を備えることを特徴とする車両用制御装置。 - 請求項1に記載の車両用制御装置であって、
前記負荷が動作している期間に、前記第1の遮断機及び前記第2の遮断機をオフし、前記放電装置をオンする装置制御部をさらに備える
ことを特徴とする車両用制御装置。 - 請求項1に記載の車両用制御装置であって、
前記放電装置は、
前記第2の接続点とグランドとの接続をオン/オフするスイッチング素子を有する
ことを特徴とする車両用制御装置。 - 請求項3に記載の車両用制御装置であって、
前記スイッチング素子は、
前記第2の接続点とグランドとの間のインピーダンスを変化させる
ことを特徴とする車両用制御装置。 - 請求項1に記載の車両用制御装置であって、
前記放電装置は、
前記第2の接続点とグランドを接続する抵抗を有する
ことを特徴とする車両用制御装置。 - 請求項1に記載の車両用制御装置であって、
前記第2の接続点の電圧を測定する電圧測定部と、
前記第1の遮断機及び前記第2の遮断機をオフし前記放電装置をオンする期間に測定された前記第2の接続点の電圧が閾値を超える場合、前記第1の遮断機が故障していると診断する診断部と、
を備えることを特徴とする車両用制御装置。 - 請求項2に記載の車両用制御装置であって、
前記平滑コンデンサは、
前記第1の遮断機及び前記第2の遮断機をオフし前記放電装置をオンする期間に前記負荷へ電力を供給する
ことを特徴とする車両用制御装置。 - 請求項2に記載の車両用制御装置であって、
前記装置制御部は、
前記負荷に流れる電流が最小となるタイミングで、前記第1の遮断機及び前記第2の遮断機をオフし、前記放電装置をオンする
ことを特徴とする車両用制御装置。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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CN201680058042.8A CN108370149B (zh) | 2015-12-15 | 2016-10-26 | 车辆用控制装置 |
US15/781,323 US10862292B2 (en) | 2015-12-15 | 2016-10-26 | Vehicle control device |
DE112016005736.9T DE112016005736B4 (de) | 2015-12-15 | 2016-10-26 | Fahrzeugsteuervorrichtung |
JP2017556400A JP6577599B2 (ja) | 2015-12-15 | 2016-10-26 | 車両用制御装置 |
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JP2015-243730 | 2015-12-15 | ||
JP2015243730 | 2015-12-15 |
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WO2017104270A1 true WO2017104270A1 (ja) | 2017-06-22 |
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JP (1) | JP6577599B2 (ja) |
CN (1) | CN108370149B (ja) |
DE (1) | DE112016005736B4 (ja) |
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JP2007145208A (ja) * | 2005-11-29 | 2007-06-14 | Matsushita Electric Ind Co Ltd | 電子制御装置 |
JP2012139021A (ja) * | 2010-12-27 | 2012-07-19 | Denso Corp | モータ制御装置、および、これを用いた電動パワーステアリング装置 |
JP2015033233A (ja) * | 2013-08-02 | 2015-02-16 | 株式会社ジェイテクト | 電源回路の異常検出方法 |
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US9726725B2 (en) | 2013-08-02 | 2017-08-08 | Jtekt Corporation | Power circuit abnormality detection method |
JP6111937B2 (ja) | 2013-08-29 | 2017-04-12 | 株式会社デンソー | 電源遮断装置および電動機駆動装置 |
JP6361531B2 (ja) * | 2015-03-09 | 2018-07-25 | 株式会社デンソー | 半導体装置およびモータ制御装置 |
MA44908A (fr) | 2015-09-08 | 2018-07-18 | Sylentis Sau | Molécules d'arnsi et leur utilisation dans des procédés et des compositions pour inhiber l'expression du gène nrarp |
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- 2016-10-26 US US15/781,323 patent/US10862292B2/en active Active
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JP2007145208A (ja) * | 2005-11-29 | 2007-06-14 | Matsushita Electric Ind Co Ltd | 電子制御装置 |
JP2012139021A (ja) * | 2010-12-27 | 2012-07-19 | Denso Corp | モータ制御装置、および、これを用いた電動パワーステアリング装置 |
JP2015033233A (ja) * | 2013-08-02 | 2015-02-16 | 株式会社ジェイテクト | 電源回路の異常検出方法 |
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DE112016005736T5 (de) | 2018-10-04 |
US20180358798A1 (en) | 2018-12-13 |
DE112016005736B4 (de) | 2022-05-05 |
US10862292B2 (en) | 2020-12-08 |
JP6577599B2 (ja) | 2019-09-18 |
JPWO2017104270A1 (ja) | 2018-08-30 |
CN108370149B (zh) | 2020-03-27 |
CN108370149A (zh) | 2018-08-03 |
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