Abstract: A variable displacement compressor for efficiently cooling and lubricating seals arranged on a rotary shaft. The seals are arranged at end portions of the rotary shaft that project from a housing of the compressor. A first lubrication chamber is defined by a first seal in the housing around the front end portion of the rotary shaft. A second lubrication chamber is defined by a second seal in the housing around the rear end portion of the rotary shaft. A shaft passage extends through the rotary shaft to connect the first and second lubrication chambers. Refrigerant gas including lubricating oil flows from a crank chamber to a suction chamber via the first lubrication chamber, the shaft passage, and the second lubrication chamber. This efficiently cools and lubricates the seals.

Abstract: A low-vibration/noise brushless motor capable of limiting the height of coil ends, and a low-current-leak hermetic compressor includes the brushless motor. This brushless motor is of a three-phase full-pitch-winding type including a stator having coils (20) inserted in slots in a one coil per one slot manner. Coil ends (21) of the coils (20) are arranged such that the first coil (201) is arranged outside the second and third coils (202, 203) in a place (A) where the second and third coils (202, 203) are inserted in a pair of slots adjacent to each other, the second coil (202) is arranged from inside of the first coil (201) to outside of the third coil (203) in a place (B) where the first and third coils are inserted in another pair of slots adjacent, and the third coil (203) is arranged inside the first and second coils (201, 202) in a place (C) where the first and second coils (201, 202) are inserted in still another pair of adjacent slots. The coil ends (21) are shaped in the axial direction.

Abstract: A power transmission mechanism is attached to a housing of a rotary machine for inputting power to a rotary shaft of the rotary machine and includes a rotary body that is rotatably supported by the housing through a rotary body bearing and an electric motor, a stator of which is supported by the housing through a stator bracket. A positioning structure for the power transmission mechanism includes a bearing positioning means and a bracket positioning means. The bearing positioning means positions the rotary body bearing forward and rearward in an axial direction of the rotary shaft relative to the housing and has front and rear positioning surfaces. The bracket positioning means positions the stator bracket forward and rearward in the axial direction and has front and rear positioning surfaces. At least one of the front and rear positioning surfaces of the respective positioning means is shared with each other.

Abstract: To provide a motor which can suppress vibration and noise during an operation of a concentrated winding motor and can achieve low vibration and low noise with high efficiency. Skew is formed on at least one of a stator (10) provided with concentrated windings and a rotor (20), and the windings (13—13) of different phases in a groove (19) for windings are brought into contact with each other directly or via an insulating material.

Abstract: When an electric compressor is activated, initial current data is selected by a selector, and a motor is driven with the torque corresponding to the initial current data. When the motor is driven by a ½ turn, the selector selects current difference data. The current difference data corresponds to an instructed speed. After the switch of the selector, the motor is driven to rotate at the instructed speed.

Abstract: A non-contact electric power supply system for a rail-guided vehicle includes a main line having fixed rails for guiding the vehicle. A movable rail body is provided for changing the course of the vehicle moving along the main line. A first high frequency power supply apparatus supplies electric power to the main line along an electric feed line. A second high frequency power supply apparatus supplies electric power to the movable rail body along an electric feed line. Portions of the electric feed line on the movable rail body may be fixed in place.

Abstract: A variable displacement compressor for efficiently cooling and lubricating seals arranged on a rotary shaft. The seals are arranged at end portions of the rotary shaft that project from a housing of the compressor. A first lubrication chamber is defined by a first seal in the housing around the front end portion of the rotary shaft. A second lubrication chamber is defined by a second seal in the housing around the rear end portion of the rotary shaft. A shaft passage extends through the rotary shaft to connect the first and second lubrication chambers. Refrigerant gas including lubricating oil flows from a crank chamber to a suction chamber via the first lubrication chamber, the shaft passage, and the second lubrication chamber. This efficiently cools and lubricates the seals.

Abstract: In a hybrid compressor, a compression mechanism includes a rotary shaft, which has a first end and a second end. The first end of the rotary shaft is coupled to a rotating body, which receives power from an external drive source. The second end of the rotary shaft is coupled to an electric motor, which drives the rotary shaft. The rotary shaft is coupled to a rotor of the electric motor via a one-way clutch, which prevents power from being transmitted from the rotary shaft to the rotor. The rotor is supported by a motor shaft, which is separate from the rotary shaft. The second end of the rotary shaft is coupled to an end of the motor shaft using the one-way clutch as a coupling.

Abstract: In a multi-output power conversion circuit which drives a polyphase AC motor and another device but the polyphase AC motor using a DC power source, a transformer is connected to the neutral point of the polyphase AC motor, an AC voltage at a zero-phase voltage frequency is obtained from the transformer, and the other device is loaded with the AC voltage.

Abstract: A compressor includes a housing, a rotary shaft, a pulley, an electric motor, a pulley one-way clutch, and a motor one-way clutch. The shaft is rotatably supported by the housing. The pulley is operably connected to the shaft and includes a power transmission portion. When power is transmitted from a vehicular engine to the power transmission portion, the pulley is rotated. The electric motor rotates the shaft and includes a rotor, which is operably connected to the shaft. At least part of the electric motor overlaps the power transmission portion in the axial direction of the shaft. The pulley one-way clutch is located between the pulley and the shaft and selectively permits and prevents power transmission between the pulley and the shaft. The motor one-way clutch is located between the rotor and the shaft and selectively permits and prevents power transmission between the rotor and the shaft.

Abstract: A control device for a hybrid compressor includes a motor driver for driving an electric motor, a clutch controller for driving an electromagnetic clutch and an engine drive timing controller. Power is transmitted from an engine to the compressor when the electromagnetic clutch is connected. The clutch controller sets a connecting force of the electromagnetic clutch to transmit a second starting torque of the compressor. The engine drive timing controller is electrically connected to the motor driver and the clutch controller. The engine drive timing controller commands the motor driver to activate the electric motor to discharge liquid refrigerant from the compression chambers to a predetermined level so that the compressor reduces its starting torque to the second starting torque before commanding the clutch controller to connect the electromagnetic clutch to transmit the power from the engine to the compressor.

Abstract: In a scroll type compressor having a movable scroll member and a fixed scroll member, the movable scroll member and the fixed scroll member defines compression chambers therebetween. The compression chambers reduce in volume in accordance with orbital motion of the movable scroll member relative to the fixed scroll member. Thus gas is compressed. A variable displacement mechanism for the scroll type compressor has a by-pass passage, a pivotal plate and an actuator. The by-pass passage serves to interconnect the compression chamber in a process of volume-reducing and a suction pressure region. The pivotal plate has a communication hole that partially constitutes the by-pass passage and is selectively pivoted between a first pivotal position for opening the by-pass passage by the communication hole and a second pivotal position for closing the by-pass passage. The actuator serves to pivot the pivotal plate.

Abstract: An air conditioner for air conditioning the interior of a compartment includes a compressor and an electric motor. The compressor compresses refrigerant gas and changes the displacement. The electric motor drives the compressor. A motor controller rotates the motor at a constant reference speed. A detection device detects information related to the thermal load on the air conditioner. A current sensor detects the value of current supplied to the electric motor. A controller controls the compressor based on the detected thermal load information and the detected current value. The controller computes a target torque of the compressor based on the thermal load information. In accordance with the computed target torque, the controller computes a target current value to be supplied to the electric motor. The controller further controls the displacement of the compressor such that the detected current value matches the target current value.

Abstract: The present invention provides a rotating apparatus. The rotating apparatus includes a rotor and a motor generator. The rotor includes a belt holder on its outer circumferential surface. The belt holder transmits power between an engine and the rotor. The motor generator is accommodated in and operably connected to the rotor. The motor generator selectively functions as at least one of a motor and a generator. The motor generator is arranged inside the belt holder such that the motor generator is surrounded by the belt holder.

Abstract: Scroll compressors (1) may include a housing (2, 3) having an inlet port (3a) and an outlet port (3b). A drive scroll (10) may be rotatably disposed within the housing and may have a rotational axis. A driven scroll (20) may be rotatably disposed within the housing and may have a rotational axis. The driven scroll rotational axis preferably is offset to the drive scroll rotational axis. Further, at least one compression chamber (30) is preferably defined between the drive scroll and the driven scroll. A first bearing (14) may rotatably support the drive scroll in a cantilever manner and a second bearing (24, 115) may rotatably support the driven scroll in a cantilever manner. A transmission (31, 131, 231 and 331) or other device may be provided to rotate the drive scroll in synchronism with the driven scroll.

Abstract: In a generator and motor system of the present invention, when an engine is running, a rotational apparatus is driven by power from the engine and a motor generator is driven to generate power, and when the engine is stopped, the motor generator is put in motion by power supply from the outside to drive the rotational apparatus. The system includes a mechanical power transmission mechanism for transmitting power of the engine to the motor generator and the rotational apparatus. The power transmission mechanism permits power transmission from the engine to the motor generator and the rotational apparatus, and prevents power transmission from the motor generator to the engine.

Abstract: An inverter includes a plurality of transistors, generates a 3-phase AC voltage, and supplies it to a 3-phase AC motor. The voltage on the primary side of a transformer connected to the neutral point of the 3-phase AC motor is controlled by changing the phase difference of a drive signal of each phase supplied to the inverter through a phase difference circuit. Thus, the output voltage of the transformer can be set to a desired value by a power supply circuit with a simple configuration.

Abstract: A mechanical rotational device includes a housing. An end portion of a rotary shaft protrudes from a front wall of the housing. An electric rotational device is coaxial with the rotary shaft and is coupled to the end portion of the rotary shaft. The electric rotational device functions as at least one of a motor and a generator. A rotational member is coupled to the rotary shaft and has a power transmitting mechanism for transmitting power between the rotational unit and an external device. A one-way clutch is located in the power transmitting path between the rotary shaft and rotational member. The one-way clutch is located inward of the rotational member. The electric rotational device is located on or forward of the housing. At least part of the electric rotational device is located outward of the power transmitting mechanism.

Abstract: A hybrid compressor system in a vehicle air conditioner includes a variable displacement hybrid compressor, a detector for detecting information for air conditioning, a thermal load calculator and a controller. The compressor is selectively driven by an engine and an electric motor. The calculator calculates a thermal load based on the detected information. The controller compares the thermal load with a predetermined value. The controller changes displacement of the compressor to a first predetermined displacement value and selects the engine as a drive source of the compressor when the thermal load is larger than the predetermined value. The controller changes the displacement of the compressor to a second predetermined displacement value that is smaller than the first predetermined displacement value and selects the electric motor as the drive source of the compressor when the thermal load is equal to, or smaller than the predetermined value.

Abstract: A low-vibration/noise brushless motor capable of limiting the height of coil ends, and a low-current-leak hermetic compressor includes the brushless motor. This brushless motor is of a three-phase full-pitch-winding type including a stator having coils (20) inserted in slots in a one coil per one slot manner. Coil ends (21) of the coils (20) are arranged such that the first coil (201) is arranged outside the second and third coils (202, 203) in a place (A) where the second and third coils (202, 203) are inserted in a pair of slots adjacent to each other, the second coil (202) is arranged from inside of the first coil (201) to outside of the third coil (203) in a place (B) where the first and third coils are inserted in another pair of slots adjacent, and the third coil (203) is arranged inside the first and second coils (201, 202) in a place (C) where the first and second coils (201, 202) are inserted in still another pair of adjacent slots. The coil ends (21) are shaped in the axial direction.