Abstract: Provided is a pump that includes an annular molded stator having a substrate mounted with a Hall element and that includes a rotor having an annular rotor unit rotatably housed in a cup-shaped partition component, with one end thereof in an axial direction facing the Hall element and the other end thereof in the axial direction provided with an impeller attachment unit. The rotor unit includes a resin magnet, a sleeve bearing, and a resin portion. The resin magnet includes a rotor-position detecting magnetic-pole portion protruding axially with a predetermined height in an annular shape having a predetermined width in a radial direction on an outer periphery of an end face opposite to the Hall element. The rotor-position detecting magnetic-pole portion includes a plurality of arc-shaped notches on the same circumference on an inner diameter side thereof.

Abstract: A current detection device for detecting an electric current flowing through an inverter, an overcurrent level generation device for generating an abnormality judgment reference value, an overcurrent detection device for generating an interruption signal to the inverter on the basis of an output of the current detection device and the abnormality judgment reference value, and an adjusting apparatus for correcting the abnormality judgment reference value of the overcurrent level generation device on the basis of the output at a time when a constant electric current is applied to the current detection device are provided. The overcurrent level generating device is provided with one or a plurality of resistance value adjusting sections, and generates the abnormality judgment reference value in correspondence to a resistance value of the resistance value adjusting section.

Abstract: A stator for an electric motor includes: a stator core that includes a plurality of teeth on which insulating portions are provided; and a coil formed by winding a wire around each of the teeth. A lead-in opening and a lead-out opening are formed in insulating portions provided on an outside diameter side of the stator core. The lead-in opening leads in a crossover wire of the coil routed to an outer peripheral side of the insulating portions to the side of the teeth. The lead-out opening leads out the crossover wire of the coil from the side of the teeth to the outer peripheral side of the insulating portions. The length from an axial end portion of the stator core on an insulating portion side to the lead-in opening is different from the length from the axial end portion to the lead-out opening.

Abstract: A stator for an electric motor includes a substrate, sensor leads and power leads connected to the substrate, and a lead wiring part that retains the substrate and routes the sensor leads and the power leads. The substrate has a Hall IC that is a position detection circuit for a rotor mounted thereon, and a hole for inserting a terminal provided in a board-in connector formed therein. The substrate is retained only by the lead wiring part, and the sensor leads and the power leads are retained by the lead wiring part.

Abstract: In a rotor portion, a magnet formed in a cylindrical shape, a first magnet holder that holds an impeller-attachment-portion-side end portion of the magnet, a second magnet holder that holds a magnetic-pole-position-detection-element-side end portion of the magnet, a back yoke disposed inside the magnet, a sleeve bearing disposed inside the back yoke, and a position detection magnet that is provided on a surface of the second magnet holder at a side opposite to the side at which the magnet is attached and allows a magnetic flux of the position detection magnet to be detected by the magnetic-pole-position detection element are assembled integrally together with a thermoplastic resin, and the impeller attachment portion is formed of the thermoplastic resin.

Abstract: A rotor of an electric motor configured by combining a resin magnet section molded of thermoplastic resin containing ferrite and a rotation shaft includes a magnetic section for position detection integrally formed of the thermoplastic resin on an end face on one side of the resin magnet section, the thermoplastic resin being injected from an inner diameter side of the resin magnet section to the end face. Because the position of the rotor can be detected by the magnetic section without using a magnet for position detection, cost reduction can be achieved while the accuracy of detecting the position of the rotor is ensured.

Abstract: The present invention includes a stator; a substrate on which a position detection circuit for a rotor is mounted; a lead wiring part attached to one axial end of the stator and routing a sensor lead to the position detection circuit; and a housing connected to an end of the sensor lead. The substrate is attached to a first surface side of the lead wiring part, and the housing is disposed at a position that is opposed to a position at which the substrate is attached and that is on a second surface side of the lead wiring part, and the lead wiring part includes a housing contact portion provided between the position at which the substrate is attached and the position at which the housing is disposed.

Abstract: A mold motor includes a mold stator, a rotor, and a bracket. The mold stator includes a first bearing housing section formed of thermosetting resin, one bearing of the rotor fitting in one end in an axial direction of the first bearing housing section, an opening section formed at an end on the opposite side of the bearing housing section, and a bracket press-fitting section formed near the opening section and having a diameter larger than a stator inner diameter. The bracket includes a bracket resin section configuring a second bearing housing section in which the other bearing of the rotor fits and a bracket sheet metal section press-fit into the bracket press-fitting section of the mold stator. In the bracket, the bracket resin section and the bracket sheet metal section are integrally molded.

Abstract: A current detection device for detecting an electric current flowing through an inverter, an overcurrent level generation device for generating an abnormality judgment reference value, an overcurrent detection device for generating an interruption signal to the inverter on the basis of an output of the current detection device and the abnormality judgment reference value, and an adjusting apparatus for correcting the abnormality judgment reference value of the overcurrent level generation device on the basis of the output at a time when a constant electric current is applied to the current detection device are provided. The overcurrent level generating device is provided with one or a plurality of resistance value adjusting sections, and generates the abnormality judgment reference value in correspondence to a resistance value of the resistance value adjusting section.

Abstract: An air conditioner equipped with a compressor, an indoor heat exchanger and an outdoor heat exchanger includes: an inverter circuit that drives a motor of the compressor; an inverter-power detecting unit that detects power of the inverter circuit; a PWM-signal generating unit that inverter-current detecting unit generates PWM signals for controlling the inverter circuit; a voltage-command-value generating unit that outputs voltage command values to the PWM-signal generating unit; and an accumulation detecting unit that detects accumulation of a liquid refrigerant within the compressor and outputs a detection result to the voltage-command-value generating unit, wherein when accumulation of a liquid refrigerant within the compressor is detected, the voltage-command-value generating unit outputs the voltage command value so that power of the inverter circuit has a predetermined power value.

Abstract: A rotor resin assembly of a rotor of an electric motor includes a rotor magnet including a substantially cylindrical yoke molded from thermoplastic resin containing a soft magnetic material or ferrite and a resin magnet integrally formed in the outer circumference of the yoke, a position detection magnet arranged at one end in the axial direction of the rotor magnet, and a substantially doughnut-like rotor core arranged in the inner circumference of the rotor magnet and formed by laminating a predetermined number of electromagnetic steel plates. The rotor magnet, the position detection magnet, and the rotor core are integrally formed by resin. A shaft is inserted into an inner diameter section of the rotor core, and the rotor resin assembly is caulked by a jig to form a recess in the vicinity of the inner diameter sections of both end faces of the rotor core and assembled to the shaft.

Abstract: The present invention is a molded stator including a stator and a substrate. The molded stator includes: a donut-shaped lead-wire wiring component that wires power-supply lead wires to a winding wire of the stator and that wires sensor lead wires to the position detection circuit; a lead-out component that leads out the power-supply lead wires and the sensor lead wires to outside of the molded stator; a power-supply lead-wire holding component that holds the power-supply lead wires; and a sensor-lead-wire holding component that holds the sensor lead wires. The lead-out component is connected to a latching part that latches the sensor-lead-wire holding component and includes projections as plane parts that are substantially perpendicular to a radial direction of the stator on the radially outer side.

Abstract: A stator includes: a sensor substrate attached to one end of a stator core in an axial direction of the stator core, the sensor substrate being provided with a bearing through hole and being provided with a notch on a periphery, the notch being used for leading out a power supply lead and a sensor lead; a sensor-lead board-in connector disposed between the bearing through hole and the notch on the surface of the sensor substrate on the counter-stator side, the sensor lead being connected to the sensor-lead board-in connector; and a power-supply-lead board-in connector disposed on the surface of the sensor substrate on the counter-stator side such that the power-supply-lead board-in connector faces the sensor-lead board-in connector with the bearing through hole therebetween, the power supply lead being connected to the power-supply-lead board-in connector.

Abstract: A power-supply-lead retaining part includes a pair of legs extending toward a bearing through hole, a pair of first locking portions provided on the pair of legs and locked to the edge portion of the bearing through hole, and a pair of second locking portions locked to the edge portion of the sensor substrate on both sides of a notch.

Abstract: To provide an electric-motor rotor including a cylindrical yoke, a resin magnet portion that is formed from resin magnet integrally with the outer periphery of the yoke, a position-detecting magnet that is located on one axial-end side of the resin magnet portion, a plurality of seats that are formed on the axial end surface of the yoke on the side of the position-detecting magnet, each of which includes a pair of protruding portions, and an opening formed between the protruding portions, and a seat connecting portion that is formed with the seats on its top surface, wherein a ribbed runner that supplies the resin magnet to the resin magnet portion through the opening is provided at the opening to form, along with the seat, a seat portion that places thereon the position-detecting magnet.

Abstract: A high efficiency refrigerant compressor standby heating method reduces vibrations and noise in a bearing of the compressor. The compressor comprises a motor, an inverter, an inverter controller, and a bus voltage detector to detect a bus voltage of the inverter. The inverter controller includes a dormant refrigerant detector to detect a dormant state of refrigerant in the compressor, a high-frequency AC voltage generator to output a high-frequency AC voltage command, which is out of a range of an operating frequency when the compressor is running, to a coil of the motor on the basis of an output of the dormant refrigerant detector, an amplitude, and a phase. A pulse width modulation signal generator to cause the inverter to generate a high-frequency AC voltage by generating a signal on the basis of the output of the high-frequency AC voltage generator and the output of the bus voltage detector.

Abstract: Provided is a pump that includes an annular molded stator having a substrate mounted with a Hall element and that includes a rotor having an annular rotor unit rotatably housed in a cup-shaped partition component, with one end thereof in an axial direction facing the Hall element and the other end thereof in the axial direction provided with an impeller attachment unit. The rotor unit includes a resin magnet, a sleeve bearing, and a resin portion. The resin magnet includes a rotor-position detecting magnetic-pole portion protruding axially with a predetermined height in an annular shape having a predetermined width in a radial direction on an outer periphery of an end face opposite to the Hall element. The rotor-position detecting magnetic-pole portion includes a plurality of arc-shaped notches on the same circumference on an inner diameter side thereof.

Abstract: A resin magnet, a magnetic pole position detection resin magnet, and a sleeve bearing, which is disposed inside the resin magnet, are integrally molded together with a thermoplastic resin in a rotor portion. At the same time, an impeller attachment portion is formed by the thermoplastic resin.

Abstract: In a rotor portion, a magnet formed in a cylindrical shape, a first magnet holder that holds an impeller-attachment-portion-side end portion of the magnet, a second magnet holder that holds a magnetic-pole-position-detection-element-side end portion of the magnet, a back yoke disposed inside the magnet, a sleeve bearing disposed inside the back yoke, and a position detection magnet that is provided on a surface of the second magnet holder at a side opposite to the side at which the magnet is attached and allows a magnetic flux of the position detection magnet to be detected by the magnetic-pole-position detection element are assembled integrally together with a thermoplastic resin, and the impeller attachment portion is formed of the thermoplastic resin.

Abstract: In a pump, a resin magnet included in a rotor portion has a plurality of groove portions in an outer peripheral portion thereof, the groove portions extending in an axial direction.