Method for controlling motor-driven compressor configured to be installed in vehicle

• US 10,458,420 B2
• Filed: 03/24/2017
• Issued: 10/29/2019
• Est. Priority Date: 03/29/2016
• Status: Active Grant

• Current Assignee: Kabushiki Kaisha Toyota Jidoshokki
• Original Assignee: Kabushiki Kaisha Toyota Jidoshokki
• Inventors: Kawashima, Takashi, Nagata, Yoshiki, Najima, Kazuki
• Primary Examiner(s): Dhakal, Bickey
• Assistant Examiner(s): Imtiaz, Zoheb S
• Application Number:
  US15/468,307
• Publication Number:
  US 20170284409A1
• Time in Patent Office: 949 Days
• CPC Class Codes: B60H 1/3222 characterised by the compressor driving arrangements, e.g. clutches, transmissions or multiple drives B60H1/3208, B60H1/3226 take precedence
• CPC Class Codes: B60H 2001/3272 to control the revolving speed of a compressor
• CPC Class Codes: B60H 2001/3292 Compressor drive is electric only
• CPC Class Codes: F04B 27/08 having cylinders coaxial with, or parallel or inclined to, main shaft axis
• CPC Class Codes: F04B 35/04 the means being electric
• CPC Class Codes: F04B 49/02 Stopping, starting, unloading or idling control
• CPC Class Codes: F04B 49/06 Control using electricity regulating by means of floats actuating electric switches F04B49/04
• CPC Class Codes: F04B 49/20 by changing the driving speed
• CPC Class Codes: F04C 2240/40 Electric motor
• CPC Class Codes: F04C 2240/403 with inverter for speed control
• CPC Class Codes: F04C 2270/051 Controlled or regulated
• CPC Class Codes: F04C 2270/0525 Controlled or regulated
• CPC Class Codes: F04C 2270/605 Controlled or regulated
• CPC Class Codes: F04C 23/008 Hermetic pumps
• CPC Class Codes: F04C 28/08 characterised by varying the rotational speed
• CPC Class Codes: F04C 29/0085 Prime movers
• CPC Class Codes: F04D 25/0673 Battery powered
• CPC Class Codes: F04D 27/004 by varying driving speed
• CPC Class Codes: Y02B 30/70 Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The control section controls the electric motor to be driven such that the number of revolutions becomes equal to the target number of revolutions. If the control section sets the target number of revolutions to a number of revolutions of the electric motor requested by another control section, the control section changes the number of revolutions of the electric motor at an increase rate lower than or equal to the upper limit value of the increase rate or at a decrease rate lower than or equal to the upper limit value of the decrease rate. If the control section sets the target number of revolutions to a number-of-revolutions limit value, which is determined based on the voltage of a vehicle battery, the control section is able to decrease the number of revolutions of the electric motor at a decrease rate exceeding the upper limit value.

Claims

1. A method for controlling acceleration and deceleration of a motor-driven compressor configured to be installed in a vehicle, the motor-driven compressor including an electric motor driven with supply of electric power from a battery and a control section that controls drive of the electric motor, wherein

the control section has an upper limit value of an increase rate of a number of revolutions per unit time of the electric motor and an upper limit value of a decrease rate of the number of revolutions per unit time of the electric motor,

the control section sets a target number of revolutions and controls the electric motor to be driven such that the number of revolutions of the electric motor becomes equal to the target number of revolutions,

if the control section sets the target number of revolutions to a number of revolutions of the electric motor requested by another control section, the control section changes the number of revolutions of the electric motor at an increase rate lower than or equal to the upper limit value of the increase rate or a decrease rate lower than or equal to the upper limit value of the decrease rate, and

if the control section sets the target number of revolutions to a number-of-revolution limit value determined based on a voltage of the battery, the control section is able to decrease the number of revolutions of the electric motor at a decrease rate that exceeds the upper limit value of the decrease rate.

2. A motor-driven compressor configured to be installed in a vehicle, comprising:

an electric motor driven with supply of electric power from a battery; and

a control section that controls drive of the electric motor, wherein

the control section has an upper limit value of an increase rate of a number of revolutions per unit time of the electric motor and an upper limit value of a decrease rate of the number of revolutions per unit time of the electric motor,

the control section sets a target number of revolutions and controls the electric motor to be driven such that the number of revolutions of the electric motor becomes equal to the target number of revolutions,

if the control section sets the target number of revolutions to a number of revolutions of the electric motor requested by another control section, the control section changes the number of revolutions of the electric motor at an increase rate lower than or equal to the upper limit value of the increase rate or a decrease rate lower than or equal to the upper limit value of the decrease rate, and

if the control section sets the target number of revolutions to a number-of-revolution limit value determined based on a voltage of the battery, the control section is able to decrease the number of revolutions of the electric motor at a decrease rate that exceeds the upper limit value of the decrease rate.