公开(公告)号：US11824472B2

公开(公告)日：2023-11-21

申请号：US17481053

申请日：2021-09-21

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Takayuki Miyajima ,  Takahiro Yokoyama ,  Tetsuo Nakata ,  Junpei Yamamoto

IPC: H02P23/28 ,  H02K9/19 ,  H02K21/02 ,  H02P25/022 ,  H02P27/06

CPC classification number: H02P23/28 ,  H02K9/19 ,  H02K21/02 ,  H02P25/022 ,  H02P27/06 ,  H02K2209/00

Abstract: A motor drive apparatus includes a motor, a power converter, and a controller that controls the voltage supplied to the motor by the power converter. The power converter converts a voltage of a 400 V-class AC power supply to a voltage with an effective value lower than an effective value of the 400 V-class AC power supply. The power converter converts the voltage by a switching operation of a plurality of switching elements. The motor is configured so that a value of φ×Vx/Ld is greater than Pmax when an effective value voltage Vx=200 V. A d-axis inductance of the motor is Ld. A flux linkage of the motor is φ. A maximum output of the motor in a device where the motor is mounted is Pmax. The controller has a control mode in which an effective value voltage higher than Vx is applied to the motor.

公开(公告)号：US09366267B2

公开(公告)日：2016-06-14

申请号：US14345109

申请日：2012-09-24

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Tetsuo Nakata

IPC: F16D31/02 ,  F04D29/58 ,  F04B49/06 ,  F15B1/26 ,  F15B19/00

CPC classification number: F04D29/5806 ,  F04B49/065 ,  F15B1/26 ,  F15B19/005

Abstract: An oil-hydraulic unit includes a power module generating heat when energized. The power module is provided on the bottom surface of a recess facing hydraulic oil in a tank. Thus, the power module is cooled by the hydraulic oil in the tank. This reduces the difference in temperature between the power module and the hydraulic oil in the tank. In the oil-hydraulic unit, the temperature sensor detects the temperature of the power module. The oil temperature in the tank is estimated based on the temperature detected by the temperature sensor.

Abstract translation: 油压单元包括通电时产生热量的功率模块。 功率模块设置在槽内面向液压油的凹槽的底面上。 因此，功率模块由油箱中的液压油冷却。 这样可以降低油箱内的功率模块和液压油之间的温差。 在油压单元中，温度传感器检测电源模块的温度。 基于由温度传感器检测的温度来估计罐中的油温。

公开(公告)号：US20140260234A1

公开(公告)日：2014-09-18

申请号：US14345109

申请日：2012-09-24

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Tetsuo Nakata

IPC: F04D29/58

CPC classification number: F04D29/5806 ,  F04B49/065 ,  F15B1/26 ,  F15B19/005

Abstract: An oil-hydraulic unit includes a power module generating heat when energized. The power module is provided on the bottom surface of a recess facing hydraulic oil in a tank. Thus, the power module is cooled by the hydraulic oil in the tank. This reduces the difference in temperature between the power module and the hydraulic oil in the tank. In the oil-hydraulic unit, the temperature sensor detects the temperature of the power module. The oil temperature in the tank is estimated based on the temperature detected by the temperature sensor.

Abstract translation: 油压单元包括通电时产生热量的功率模块。 功率模块设置在槽内面向液压油的凹槽的底面上。 因此，功率模块由油箱中的液压油冷却。 这样可以降低油箱内的功率模块和液压油之间的温差。 在油压单元中，温度传感器检测电源模块的温度。 基于由温度传感器检测的温度来估计罐中的油温。