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公开(公告)号：US20200373801A1
公开(公告)日：2020-11-26
申请号：US16989641
申请日：2020-08-10
申请人： DENSO CORPORATION
发明人： Hirofumi KINJO , Makoto TANIGUCHI
摘要： A drive apparatus is provided for driving a rotating electric machine having first and second multi-phase coils. The drive apparatus includes first and second inverters, first and second shift switches, and first and second energization controllers. The first energization controller is configured to turn on and off, for each of phase windings of the first and second multi-phase coils, one corresponding pair of upper-arm and lower-arm switches of the first and second inverters while keeping the first and second shift switches in an OFF state. The second energization controller is configured to turn on and off, for each corresponding pair of the phase windings of the first and second multi-phase coils, one corresponding upper-arm switch of the first inverter and one corresponding lower-arm switch of the second inverter respectively for first energization periods and second energization periods that are alternately set while keeping the shift switches in an ON state.
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公开(公告)号：US20200052638A1
公开(公告)日：2020-02-13
申请号：US16598753
申请日：2019-10-10
申请人： DENSO CORPORATION
发明人： Hirofumi KINJO , Toru WAKIMOTO , Makoto TANIGUCHI , Keiji KONDO , Jun ISHIDA , Tomoya TAKAHASHI
摘要： In a rotary electric machine, a rotor, and a stator. The stator includes slots provided in a circumferential direction thereof, and stator windings wound in the slots. The stator windings include n groups of three-phase windings, where n is a power of 2. The slots include first slots each accommodating portions of same-group and same-phase windings in the n groups of three-phase windings. The energizing directions of the same-group and same-phase windings are identical to each other. The second slots each accommodate different-group and same-phase windings in the n groups of three-phase windings. The first slots and the second slots are arranged in the stator at predetermined intervals in a circumferential direction of the stator, and the three-phase windings of each group are wound around the stator with regular intervals therebetween.
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公开(公告)号：US20190312487A1
公开(公告)日：2019-10-10
申请号：US16369671
申请日：2019-03-29
申请人： DENSO CORPORATION
摘要： A rotating electric machine unit includes a rotating electric machine, a high heat generation circuit and a low heat generation circuit both of which are electrically connected with the rotating electric machine, a first cooler, a first-coolant supplier, a second cooler and a second-coolant supplier. The first cooler is configured to cool both the high heat generation circuit and the low heat generation circuit with a first coolant. The first-coolant supplier is configured to supply the first coolant to the first cooler. The second cooler is configured to cool the rotating electric machine with a second coolant. The second-coolant supplier is configured to supply the second coolant to the second cooler. The second-coolant supplier is formed integrally with a low heat generation circuit-cooling part of the first cooler. The second-coolant supplier includes a heat exchanger via which heat is exchanged between the first coolant and the second coolant.
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公开(公告)号：US20210257947A1
公开(公告)日：2021-08-19
申请号：US17306197
申请日：2021-05-03
申请人： DENSO CORPORATION
发明人： Hirofumi KINJO , Makoto TANIGUCHI
摘要： In a driving device for a rotating electric machine, a first inverter unit blocks and allows, for each winding of multi-phase windings of the rotating electric machine, current conduction on one side of the winding and a second inverter unit blocks and allows current conduction on the other side of the winding. A plurality of second switching elements forming the second inverter unit each have a lower ON resistance than a plurality of first switching elements forming the first inverter unit. A controller is configured to switch on and off the respective first switching elements at a switching frequency higher than an electric fundamental frequency and switch on and off the respective second switching elements at a switching frequency lower than the switching frequency at which to switch on and off the first switching elements.
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公开(公告)号：US20130300397A1
公开(公告)日：2013-11-14
申请号：US13743745
申请日：2013-01-17
申请人： DENSO CORPORATION
CPC分类号： H02M3/24 , B60R16/03 , H02M3/33507 , H02M3/3376
摘要： In a power converter, a reference signal generator generates a reference signal with a predetermined period. A current detector detects a current flowing in the converter. When a value of the detected current is larger than a value of a predetermined current command, a reset signal generator generates a reset signal. A driving unit drives a switch. The switch is turned on, and subsequently is turned off: (i) in synchronization with the reference signal when the reset signal is not outputted before the reference signal is outputted; and (ii) in synchronization with the reset signal when the reset signal is outputted before the reference signal is outputted. However, the switch is turned off in synchronization with the reset signal during a predetermined time including a first predetermined time before an output timing of the reference signal and a second predetermined time after the output timing of the reference signal.
摘要翻译： 在功率转换器中，参考信号发生器产生具有预定周期的参考信号。 电流检测器检测在转换器中流动的电流。 当检测电流的值大于预定电流指令的值时，复位信号发生器产生复位信号。 驱动单元驱动开关。 开关导通，随后断开：（i）在参考信号输出之前不输出复位信号时与参考信号同步; 以及（ii）当在输出参考信号之前输出复位信号时与复位信号同步。 然而，在包括参考信号的输出定时之前的第一预定时间和参考信号的输出定时之后的第二预定时间的预定时间期间，开关与复位信号同步地被关闭。
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公开(公告)号：US20210211084A1
公开(公告)日：2021-07-08
申请号：US17212655
申请日：2021-03-25
申请人： DENSO CORPORATION
IPC分类号： H02P27/08 , H02M7/5387 , H02M1/08
摘要： A drive device for a rotary electric machine includes a first inverter that has high-potential side and low-potential side switching elements corresponding to phases of the rotary electric machine and is connected to a DC power supply, a second inverter that has high-potential side and low-potential side switching elements corresponding to the phases and is connected to the first inverter via a connection line, and a controller that controls the first and second inverters so that if a percentage modulation expressed by a fundamental wave component amplitude of a phase winding voltage and a CD voltage is a threshold value or more, percentage modulations of output phase voltages of the first and second inverters are more than 1, and so that a phase difference between a phase of the output phase voltage of the first inverter section and that of the second inverter section changes depending on the percentage modulation.
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