公开(公告)号：US20140042990A1

公开(公告)日：2014-02-13

申请号：US13933729

申请日：2013-07-02

Applicant: DENSO CORPORATION

Inventor： Toshinori MARUYAMA ,  Masaya NAKANISHI ,  Asaka KIMURA ,  Takatoshi INOKUCHI

IPC: H02P9/10

CPC classification number: H02P9/102 ,  H02P9/107 ,  H02P9/48

Abstract: An alternator has rectifying module groups. The rectifying module groups form a bridge circuit. The rectifying module groups have a load dump protection judgment section for monitoring an output voltage of rectifying module groups. When the monitored output voltage exceeds a first threshold voltage, the load dump protection judgment section provides to a control section an instruction to turn on MOS transistors in a lower arm of the bridge circuit at a time when a predetermined delay time has elapsed. When a second threshold voltage is lower than the first threshold voltage and the monitored output voltage becomes less than the second threshold voltage after the monitored output voltage exceeds the first threshold voltage, the load dump protection judgment section provides to the control circuit an instruction to turn on the MOS transistors in the lower arm after the MOS transistors are turned off during a predetermined time length.

Abstract translation: 交流发电机具有整流模块组。 整流模块组成桥接电路。 整流模块组具有负载突降保护判断部分，用于监控整流模块组的输出电压。 当监视的输出电压超过第一阈值电压时，负载突降保护判断部分在经过预定的延迟时间的时候向控制部分提供在桥接电路的下臂中接通MOS晶体管的指令。 当第二阈值电压低于第一阈值电压，并且在监视的输出电压超过第一阈值电压之后监视的输出电压变得小于第二阈值电压时，负载突降保护判断部分向控制电路提供转向指令 在MOS晶体管在预定时间长度内关闭之后，在下臂中的MOS晶体管上。

公开(公告)号：US20160118920A1

公开(公告)日：2016-04-28

申请号：US14922593

申请日：2015-10-26

Applicant: DENSO CORPORATION

Inventor： Asaka KIMURA ,  Takatoshi INOKUCHI ,  Masaya NAKANISHI ,  Toshinori MARUYAMA

IPC: H02P9/00

CPC classification number: H02P9/006 ,  H02P29/0241

Abstract: In a power generator, a determiner determines whether a phase voltage output from each of multiphase armature windings has exceeded a threshold voltage. A turn-on unit turns on at least one of the protective switches as a target protective switch to limit the output voltage of the rectifier circuit to be lower than the threshold voltage upon the phase voltage output from at least one of the multiphase armature windings corresponding to the at least one of the protective switches has exceeded the threshold voltage.

Abstract translation: 在发电机中，确定器确定从多相电枢绕组中输出的相电压是否超过阈值电压。 一个导通单元将至少一个保护开关作为目标保护开关，当从至少一个多相电枢绕组输出的相电压对应时，将整流电路的输出电压限制为低于阈值电压 至少一个保护开关已超过阈值电压。

公开(公告)号：US20150311848A1

公开(公告)日：2015-10-29

申请号：US14694257

申请日：2015-04-23

Applicant: DENSO CORPORATION

Inventor： Toshinori MARUYAMA ,  Takatoshi INOKUCHI ,  Masaya NAKANISHI

IPC: H02P23/00 ,  H02K11/00 ,  H02K11/04 ,  H02K1/26

CPC classification number: H02P23/00 ,  H02J7/163 ,  H02K1/26 ,  H02K11/044 ,  H02P9/08 ,  H02P9/48

Abstract: In a rotary electric machine, a modulation signal generator generates a modulation signal including information indicative of rotation of a rotor based on change of a voltage at an output end of a stator winding, and outputs the modulation signal. A rectifying unit alternately turns on and off the switch to rectify the voltage at an output end of the stator winding, thus generating a rectified voltage. An excitation current supplying circuit is communicably connected to the modulation signal generator via a communication line, and starts a supply of an excitation current to the excitation winding of the rotor to induce a rotating magnetic field in the stator winding when the modulation signal output from the modulation signal generator is input thereto via the communication line.

Abstract translation: 在旋转电机中，调制信号发生器基于定子绕组的输出端的电压的变化生成包括表示转子旋转的信息的调制信号，并输出调制信号。 整流单元交替地接通和关断开关以整流定子绕组的输出端处的电压，从而产生整流电压。 励磁电流供给电路经由通信线路与调制信号发生器通信地连接，并且当从转子输出的调制信号输出时，开始向转子的励磁绕组提供励磁电流，以引起定子绕组中的旋转磁场 调制信号发生器经由通信线路输入到其中。

公开(公告)号：US20190215992A1

公开(公告)日：2019-07-11

申请号：US16244476

申请日：2019-01-10

Applicant: DENSO CORPORATION

Inventor： Toshinori MARUYAMA

IPC: H05K7/20 ,  H02K1/12 ,  H02K1/22 ,  H02K5/20 ,  H02K11/042

CPC classification number: H05K7/20918 ,  H02K1/12 ,  H02K1/22 ,  H02K5/20 ,  H02K11/042

Abstract: A rotating electric machine includes a machine main body, a frame member and a rectifier. The machine main body is configured to generate alternating current. The frame member holds the machine main body. The rectifier is provided axially outside the frame member and has a rectification circuit configured to rectify the alternating current generated in the machine main body into direct current. The rectifier includes first and second heat sinks that are located to axially overlap each other, first rectifying elements mounted to the first heat sink and constituting an upper arm of the rectification circuit, and second rectifying elements mounted to the second heat sink and constituting a lower arm of the rectification circuit. The second heat sink is located closer than the first heat sink to the frame member. The surface area of the second heat sink is greater than the surface area of the first heat sink.

公开(公告)号：US20190237574A1

公开(公告)日：2019-08-01

申请号：US16250367

申请日：2019-01-17

Applicant: DENSO CORPORATION

Inventor： Toshinori MARUYAMA

IPC: H01L29/78 ,  H02M1/08 ,  H02K19/36 ,  H02K11/04 ,  H01L27/02 ,  H01L27/095 ,  H01L29/872

Abstract: A rectifier has a rectification circuit configured to rectify multi-phase alternating current generated by a rotating electric machine into direct current. The rectifier includes upper-arm semiconductor switching elements included in an upper arm of the rectification circuit, upper-arm protection diodes included in the upper arm and each being electrically connected in parallel with one of the upper-arm semiconductor switching elements, lower-arm semiconductor switching elements included in a lower arm of the rectification circuit, and lower-arm protection diodes included in the lower arm and each being electrically connected in parallel with one of the lower-arm semiconductor switching elements. Each of the upper-arm and lower-arm protection diodes is configured to have, when a reverse voltage higher than a breakdown voltage of the protection diode is applied to the protection diode, an operating resistance that is higher than three times an operating resistance of any of the upper-arm and lower-arm semiconductor switching elements.

公开(公告)号：US20140055894A1

公开(公告)日：2014-02-27

申请号：US13969907

申请日：2013-08-19

Applicant: DENSO CORPORATION

Inventor： Toshinori MARUYAMA ,  Takatoshi INOKUCHI ,  Asaka KIMURA ,  Masaya NAKANISHI

IPC: H02H9/04

CPC classification number: H02H9/04 ,  H02P9/107

Abstract: An electric rotating machine for a vehicle is equipped with a load dump protector. The load dump protector works to selectively perform a first and a second load dump protection operation to suppress a voltage surge arising from the load dump. When a rate at which an output voltage from the electric rotating machine is determined to be smaller than a given value, the load dump protector waits for stating the first load dump protection operation until the time when a voltage surge arising from changing of switching devices of a rectifier module of the electric rotating machine is expected to be suppressed and then performs the first load dump protection operation. When the rate is greater than the given value, the load dump protector immediately initiates the second load dump protection operation. This ensures the stability in eliminating the risk of a voltage surge arising from the load dump.

Abstract translation: 一种用于车辆的电动旋转机器配备有负载突降保护器。 负载突降保护器用于选择性地执行第一次和第二次负载突降保护操作，以抑制由负载突降引起的电压浪涌。 当将来自旋转电机的输出电压确定为小于给定值的速率时，负载突降保护器等待说明第一负载突降保护操作，直到由于开关装置的变化引起的电压浪涌 期望旋转电机的整流器模块被抑制，然后执行第一负载突降保护操作。 当速率大于给定值时，负载转储保护器立即启动第二次负载突降保护操作。 这确保了在消除由负载突降引起的电压浪涌风险的稳定性。