# US 2017/0284409 A1 · Method for controlling motor-driven compressor configured to be installed in vehicle

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- Number: US 2017/0284409 A1
- Document ID: US20170284409A1
- Status: Published application
- Kind: A1
- Application number: 15/468,307
- Filed: 2017-03-24
- Published: 2017-10-05
- Earliest claimed: 2016-03-29
- Assignees: Kabushiki Kaisha Toyota Jidoshokki
- Applicants: Kabushiki Kaisha Toyota Jidoshokki
- Inventors: Takashi KAWASHIMA; Yoshiki NAGATA; Kazuki NAJIMA
- Web page: https://patentgrep.com/patent/US20170284409A1

## CPC

- F04D 27/004: {by varying driving speed}
- B60H 1/3222: {characterised by the compressor driving arrangements, e.g. clutches, transmissions or multiple drives (B60H1/3208, B60H1/3226 take precedence)}
- F04B 27/08: having cylinders coaxial with, or parallel or inclined to, main shaft axis
- F04B 35/04: the means being electric
- F04B 49/02: Stopping, starting, unloading or idling control
- F04B 49/06: Control using electricity (regulating by means of floats actuating electric switches F04B49/04)
- F04B 49/20: by changing the driving speed
- F04C 23/008: {Hermetic pumps}
- F04C 28/08: characterised by varying the rotational speed
- F04C 29/0085: {Prime movers}
- F04D 25/0673: {Battery powered}
- B60H 2001/3272: {to control the revolving speed of a compressor}
- B60H 2001/3292: {Compressor drive is electric only}
- F04C 2240/40: Electric motor
- F04C 2240/403: with inverter for speed control
- F04C 2270/051: Controlled or regulated
- F04C 2270/0525: Controlled or regulated
- F04C 2270/605: Controlled or regulated
- Y02B 30/70: Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
- F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02)
- B60H: ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- F04B: POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS (machines for liquids, or pumps, of rotary-piston or oscillating-piston type F04C; non-positive-displacement pumps F04D; pumping of fluid by direct contact of another fluid or by using inertia of fluid to be pumped F04F)
- F04C: ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS (engines F03C); ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS

## 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

### Claim 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.

### Claim 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.