US 12,445,072 B2
Air compressor
Tomohide Tsutsui, Tokyo (JP)
Assigned to Max Co., Ltd., Tokyo (JP)
Filed by MAX CO., LTD., Tokyo (JP)
Filed on Jun. 29, 2023, as Appl. No. 18/216,238.
Claims priority of application No. 2022-107496 (JP), filed on Jul. 4, 2022.
Prior Publication US 2024/0007037 A1, Jan. 4, 2024
Int. Cl. H01M 8/04089 (2016.01); F15B 15/14 (2006.01); F15B 15/18 (2006.01); H02K 11/215 (2016.01); H02K 11/25 (2016.01); H02K 21/22 (2006.01); H02P 21/18 (2016.01); H02P 21/22 (2016.01)
CPC H02P 21/18 (2016.02) [F15B 15/1447 (2013.01); F15B 15/18 (2013.01); H02K 11/215 (2016.01); H02K 11/25 (2016.01); H02K 21/22 (2013.01); H02P 21/22 (2016.02); H02P 2207/055 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An air compressor comprising:
a motor configured to drive a compression mechanism for compressing air,
a controller configured to control the motor, and
a temperature sensor configured to detect a temperature of the motor and to output a temperature signal,
wherein the motor is an outer rotor motor comprising a stator and a rotor disposed on an outer side of the stator,
wherein the controller is configured to adjust a voltage applied to a stator winding of the stator, based on position information of the rotor, and
wherein the controller is configured to correct the position information, based on the temperature signal output from the temperature sensor.
 
3. An air compressor comprising:
a motor configured to drive a compression mechanism for compressing air, and
a controller configured to control the motor,
wherein the motor is an outer rotor motor comprising a stator and a rotor disposed on an outer side of the stator, and
wherein the controller is configured to adjust a voltage applied to a stator winding of the stator, based on position information of the rotor,
the air compressor further comprising a position sensor configured to detect a position of the rotor and to output a detection position signal,
wherein the controller is configured to correct the position information, based on the detection position signal output from the position sensor.
 
4. The air compressor according to claim 1,
wherein a waveform of current flowing through the stator winding is substantially a sinusoidal waveform.
 
7. An air compressor comprising:
a motor configured to drive a compression mechanism for compressing air, and
a controller configured to control the motor,
wherein the motor is an outer rotor motor comprising a stator and a rotor disposed on an outer side of the stator,
wherein the controller is configured to adjust a voltage applied to a stator winding of the stator, based on position information of the rotor, and
wherein the rotor has a permanent magnet, and at least a part of the permanent magnet is made from a neodymium magnet.
 
8. An air compressor comprising:
a motor configured to drive a compression mechanism for compressing air, and
a controller configured to control the motor,
wherein the motor is an outer rotor motor comprising a stator and a rotor disposed on an outer side of the stator,
wherein the controller is configured to adjust a voltage applied to a stator winding of the stator, based on position information of the rotor, and
wherein a dimension of an outermost diameter of the rotor is set within a range of 110 mm to 160 mm.