公开(公告)号：US10158318B2

公开(公告)日：2018-12-18

申请号：US15325582

申请日：2015-08-03

Applicant: DENSO CORPORATION

Inventor： Shinji Nakamoto ,  Koji Sakai

IPC: H02P8/36 ,  H02P29/024 ,  H02P23/00 ,  B60L1/00 ,  H02P27/06 ,  H02J7/00 ,  H02P21/02 ,  H02P21/22 ,  H02P29/032

Abstract: In a control device controlling a drive circuit that drives an in-vehicle electric motor based on an output voltage of a DC power source, a capacitor for stabilizing the output voltage is disposed between the DC power source and the drive circuit, and a relay switch is disposed between the DC power source and the capacitor. The control device includes: an anomaly determining device that determines whether an anomaly occurs in a vehicle; and a discharge control device that controls the drive circuit to generate a torque at the electric motor based on an output voltage of the capacitor in a state where the relay switch disconnects between the DC power source and the capacitor when the anomaly determining device determines that the anomaly occurs in the vehicle.

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：US10220677B2

公开(公告)日：2019-03-05

申请号：US15549431

申请日：2016-01-29

Applicant: DENSO CORPORATION

Inventor： Teruaki Ohyama ,  Koji Sakai ,  Yuji Kamiya ,  Tomoyuki Sumi ,  Shinji Nakamoto

IPC: B60H1/00 ,  B60L1/00 ,  B60L1/08 ,  F25B49/02 ,  B60H1/32 ,  F25B1/04 ,  F25B5/04 ,  F25B6/04

Abstract: An air conditioner for a vehicle has a compressor, a radiator, a first pressure reducer, a gas-liquid separator, a second pressure reducer, an exterior heat exchanger, an intermediate pressure refrigerant passage, a switching device, and a controller. The controller operates the switching device to switch from a refrigerant circuit of a two-stage compression mode to a refrigerant circuit of a single-stage compression mode when a compressor stop signal is output in the two-stage compression mode. The single-stage compression mode is a mode that blocks at least a flow of an intermediate-pressure refrigerant into the intermediate pressure refrigerant passage and makes refrigerant remained in the intermediate pressure refrigerant passage to flow out of the intermediate pressure refrigerant passage. The controller stops the compressor after controls the compressor to continue operating for a specified time in the single-stage compression mode. The controller restarts the compressor when the compressor stop signal is canceled.