公开(公告)号：US10465953B2

公开(公告)日：2019-11-05

申请号：US15543287

申请日：2016-01-27

Applicant: DENSO CORPORATION

Inventor： Teruaki Ohyama ,  Yuji Kamiya ,  Tomoyuki Sumi ,  Akitomo Yamanaka ,  Koji Sakai

IPC: F25B5/04 ,  F25B31/00 ,  F04D25/06 ,  F04D27/00 ,  F25B49/02

Abstract: An air conditioning apparatus includes an electric compressor, an inverter, a temperature detection element, and an ECU. The electric compressor compresses a refrigerant drawn from a refrigerant intake port and discharges the refrigerant from a refrigerant discharge port. The inverter is integrated with the electric compressor so as to be cooled by the drawn refrigerant, and operates the electric compressor according to a control signal. The temperature detection element detects a temperature of the inverter. The ECU outputs a control signal to control the inverter. The ECU performs any one or both of a control for reducing a self-cooling amount of the electric compressor and a control for increasing a self-heat generation amount of the inverter with respect to the inverter when the temperature detected by the temperature detection element is lower than a predetermined reference temperature.

公开(公告)号：US10801497B2

公开(公告)日：2020-10-13

申请号：US15744184

申请日：2016-07-28

Applicant: DENSO CORPORATION

Inventor： Shinji Nakamoto ,  Koji Sakai ,  Akihiro Imura ,  Akitomo Yamanaka

IPC: F04C28/06 ,  F25B1/04 ,  F25B1/10 ,  F25B49/02 ,  H02P6/30 ,  F04B49/02 ,  F04B35/04 ,  F04B49/20 ,  F25B5/04 ,  F04C18/02

Abstract: A controller that controls an electric compressor, which is mounted to a vehicle and configures a two-stage compression refrigeration cycle device, has a deceleration section, an operation stop section, and a restart section. The deceleration section reduces a rotational speed of an electric motor by controlling an AC current which is output to the electric motor, when a two-stage compression mode, in which an intermediate-pressure refrigerant flows into the electric compressor from an intermediate-pressure port, is performed and an operation stop request to stop the electric compressor is made. The operation stop section stops the electric motor after the deceleration section reduces the rotational speed of the electric motor. The restart section restarts the electric compressor when the operation stop request is canceled after the operation stop section stops the electric compressor.

公开(公告)号：US10250174B2

公开(公告)日：2019-04-02

申请号：US15576317

申请日：2016-05-19

Applicant: DENSO CORPORATION

Inventor： Koji Sakai ,  Akitomo Yamanaka

IPC: F25B13/00 ,  H02P23/00 ,  F25B31/02 ,  H02P27/08 ,  H02P3/18 ,  H02P29/68

Abstract: A motor driving device for a motor having a stator and a rotor rotationally driven by an input of an AC voltage includes: an inverter circuit having multiple units corresponding to multiple phases respectively, each unit having a pair of a switching element and a reflux diode connected in anti-parallel to the switching element; and a control device controlling the inverter circuit to convert a DC voltage into the AC voltage and to output the AC voltage to the stator coil. The control device includes: a field weakening control unit adjusting the AC voltage to control a magnetic field of the stator coil to weaken a field magnetic flux of the rotor; and a regenerative current control unit switching an anti-regenerative side switching element to flow a regenerative current when the AC voltage stops while the field weakening control unit performs the field weakening control.

公开(公告)号：US09318973B2

公开(公告)日：2016-04-19

申请号：US14385526

申请日：2013-04-10

Applicant: DENSO CORPORATION

Inventor： Akitomo Yamanaka

IPC: H03B1/00 ,  H03K3/00 ,  H02M7/537 ,  H03K17/082 ,  H03K17/16 ,  H02M1/08 ,  H02M1/44 ,  H02M7/5387 ,  H02M1/00

CPC classification number: H02M7/537 ,  H02M1/08 ,  H02M1/44 ,  H02M7/5387 ,  H02M2001/0029 ,  H03K17/0828 ,  H03K17/168

Abstract: A driving device includes a driving circuit and a control circuit. The driving circuit has an input terminal and an output terminal and applies a driving voltage to a switching element through the output terminal. The control circuit outputs two types of control signals to the input terminal of the driving circuit. The driving circuit has a circuit group including multiple unit circuits which are turned ON by the same control signal. Each unit circuit includes one voltage source, one switch controlled to be turned ON and OFF by the control signals, and one resistor connected in series to the switch between the voltage source and the output terminal. Each voltage source outputs a different voltage, and each resistor has a different resistance. One end of each switch of all the unit circuits is connected to the output terminal.

Abstract translation: 驱动装置包括驱动电路和控制电路。 驱动电路具有输入端子和输出端子，并通过输出端子向开关元件施加驱动电压。 控制电路将两种控制信号输出到驱动电路的输入端。 驱动电路具有通过相同控制信号导通的多个单元电路的电路组。 每个单元电路包括一个电压源，一个开关由控制信号控制为导通和截止，一个电阻串联连接到电压源和输出端之间的开关。 每个电压源输出不同的电压，每个电阻具有不同的电阻。 所有单元电路的每个开关的一端连接到输出端子。

公开(公告)号：US20150049531A1

公开(公告)日：2015-02-19

申请号：US14385526

申请日：2013-04-10

Applicant: DENSO CORPORATION

Inventor： Akitomo Yamanaka

IPC: H02M7/537

CPC classification number: H02M7/537 ,  H02M1/08 ,  H02M1/44 ,  H02M7/5387 ,  H02M2001/0029 ,  H03K17/0828 ,  H03K17/168

Abstract: A driving device includes a driving circuit and a control circuit. The driving circuit has an input terminal and an output terminal and applies a driving voltage to a switching element through the output terminal. The control circuit outputs two types of control signals to the input terminal of the driving circuit. The driving circuit has a circuit group including multiple unit circuits which are turned ON by the same control signal. Each unit circuit includes one voltage source one switch controlled to be turned ON and OFF by the control signals, and one resistor connected in series to the switch between the voltage source and the output terminal. Each voltage source outputs a different voltage, and each resistor has a different resistance. One end of each switch of all the unit circuits is connected to the output terminal.

Abstract translation: 驱动装置包括驱动电路和控制电路。 驱动电路具有输入端子和输出端子，并通过输出端子向开关元件施加驱动电压。 控制电路将两种控制信号输出到驱动电路的输入端。 驱动电路具有通过相同控制信号导通的多个单元电路的电路组。 每个单元电路包括一个电压源，一个开关控制为通过控制信号导通和截止，一个电阻串联连接到电压源和输出端之间的开关。 每个电压源输出不同的电压，每个电阻具有不同的电阻。 所有单元电路的每个开关的一端连接到输出端子。