公开(公告)号：US10432100B2

公开(公告)日：2019-10-01

申请号：US16053108

申请日：2018-08-02

Applicant: DENSO CORPORATION

Inventor： Seiji Iyasu ,  Yuji Hayashi ,  Yuichi Handa

IPC: H02M3/335 ,  H02M1/088 ,  H02M1/36 ,  H02M3/337 ,  H02M1/00

Abstract: An electric power conversion device supplies electric power of a DC power source from an input part to an output part through a power conversion circuit having a transformer and switches. The transformer has primary and secondary coils magnetically connected. The device has a choke coil, an auxiliary coil and a control part. The auxiliary coil is connected to the output part and magnetically connected to the choke coil. The auxiliary coil is wound to allow a current to flow from a negative-electrode side to a positive-electrode side of the output part when a current flows from the power source to the choke coil. The control part performs a switching control of the switches to supply electric power of the source to the output part through the auxiliary coil to prevent generation of magnetic flux in the primary coil and the current from flowing in the secondary coil.

公开(公告)号：US10270365B2

公开(公告)日：2019-04-23

申请号：US15547602

申请日：2016-02-05

Applicant: DENSO CORPORATION

Inventor： Tatsuya Murakami ,  Yuji Hayashi ,  Satoru Yoshikawa ,  Satoshi Takada ,  Masakazu Fukada

IPC: H02M1/32 ,  H02M7/5387 ,  H02M7/48 ,  H02M7/539 ,  H02M3/337 ,  H02M1/00

Abstract: A power conversion device includes an inverter which converts a DC power supplied thereto from a power supply device to an AC power using an operation of a switching element and outputs the AC power toward a load a current meter which measures an output current from the inverter, and a control unit which controls the operation of the switching element to change an output voltage waveform from the inverter. The control unit changes the output voltage waveform on the basis of the measured output current.

公开(公告)号：US20180138802A1

公开(公告)日：2018-05-17

申请号：US15816498

申请日：2017-11-17

Applicant: DENSO CORPORATION

Inventor： Seiji Iyasu ,  Yuji Hayashi ,  Kimikazu Nakamura ,  Yuichi Handa

IPC: H02M1/088 ,  H02M3/335

CPC classification number: H02M1/088 ,  H02M1/32 ,  H02M3/33592 ,  H02M2001/0009

Abstract: A control apparatus is provided which controls a power converter including a first circuit including first-side switching elements, and a second circuit including second-side switching elements and a choke coil. The control apparatus includes a current obtainment unit which obtains a value of current flowing through the choke coil, and a control unit which, when power is supplied from the second circuit to the first circuit, keeps a first-side switching element ON during a predetermined time period, before turning off at least one second-side switching element in an on state, the first-side switching element generating a reverse current in the second-side switching element to be turned off. The control unit performs control of keeping the first-side switching element ON during the predetermined time period and control of turning off the second-side switching element, on condition that the obtained value of the current is more than a predetermined command value.

公开(公告)号：US09184736B2

公开(公告)日：2015-11-10

申请号：US14015480

申请日：2013-08-30

Applicant: DENSO CORPORATION

Inventor： Hirofumi Kinjou ,  Yuji Hayashi ,  Keiji Shigeoka ,  Kimikazu Nakamura

IPC: H02M3/135 ,  H03K5/12

CPC classification number: H03K5/12

Abstract: A current mode controlled power converter controllable in a digitally processing current mode even during an on time. In the power converter, each control period based on a reference signal includes a slope calculation period in which a slope compensation signal for the control period is calculated by a slope compensation unit. During each slope calculation period, the slope compensation unit negates the slope compensation signal calculated previous to the control period including the slope calculation period, and a reset signal generation unit compares a current detection signal detected by a current detection unit with a current instruction set to an error signal generated by an error signal generation unit to generate a reset signal.

Abstract translation: 电流模式控制功率转换器，即使在接通时间也可以数字处理电流模式控制。 在功率转换器中，基于参考信号的每个控制周期包括斜率计算周期，其中通过斜率补偿单元计算用于控制周期的斜率补偿信号。 在每个斜率计算周期期间，斜率补偿单元否定在包括斜率计算周期的控制周期之前计算的斜率补偿信号，并且复位信号生成单元将由电流检测单元检测的电流检测信号与当前指令集相比较 由误差信号产生单元产生的产生复位信号的误差信号。

公开(公告)号：US08994353B2

公开(公告)日：2015-03-31

申请号：US13628406

申请日：2012-09-27

Applicant: Denso Corporation

Inventor： Yuji Hayashi

IPC: H02M3/156 ,  H02M1/32 ,  H02M1/00

CPC classification number: H02M3/156 ,  H02M1/32 ,  H02M2001/0003

Abstract: A power converter includes a control circuit provided with a set signal generator, a current command generator, a reset signal generator, a drive signal generator, and a pulse-width limiter. The set signal generator generates a set signal at every predetermined cycle. The current command generator generates a current command based on an output voltage command and an output voltage. The reset signal generator generates a reset signal based on an input current and the generated current command. The drive signal generator generates a drive signal which turns on in synchronization with the generated set signal to turn on a switching element and which turns off in synchronization with the subsequently generated reset signal to turn off the switching element. The pulse-width limiter limits a pulse-width of the drive signal according to an input voltage and the output voltage, or according to the input voltage and the output voltage command.

Abstract translation: 电力转换器包括设置有设置信号发生器，电流指令发生器，复位信号发生器，驱动信号发生器和脉冲宽度限制器的控制电路。 设置信号发生器在每个预定周期产生一个设定信号。 电流指令发生器根据输出电压指令和输出电压产生电流指令。 复位信号发生器基于输入电流和产生的电流指令产生复位信号。 驱动信号发生器产生与产生的设定信号同步地导通的驱动信号，以接通开关元件，并与随后产生的复位信号同步关断以关断开关元件。 脉冲宽度限制器根据输入电压和输出电压，或根据输入电压和输出电压指令，限制驱动信号的脉冲宽度。