An electric motor having a permanent magnet and a compressor including an electric motor are provided. The electric motor may include a stator; and a rotor rotatably disposed and spaced a predetermined gap apart from the stator. The rotor may include a rotational shaft, a permanent magnet arranged concentrically to the rotational shaft, and a permanent magnet support that supports the permanent magnet. The permanent magnet may have a cylindrical shape and be magnetized to have polar anisotropy such that a magnetic field is formed on the magnet's surface facing the gap but is not formed on the magnet's surface opposite to the gap. The permanent magnet support may be configured to form no flux path in the permanent magnet and connect the rotational shaft to the permanent magnet. Thus, the rotor has a reduced weight with consequent suppression of vibration and noise.

Systems to drive a downhole pump include an enclosure body with a magnetically transparent wall. A magnetic driver or a stationary member with coil windings in slots is disposed outside the enclosure body. A magnetic follower or a movable member with one or more permanent magnets is disposed inside the enclosure body such that the magnetic follower or movable member is exposed to a different environment compared to the magnetic driver or stationary member. The magnetic driver and magnetic follower, or the stationary member and movable member, are separated by a gap containing at least a portion of the magnetically transparent wall. A prime mover is operatively coupled to the magnetic driver. A rod couples the magnetic follower or the movable member to the downhole pump. Movement of the rod with the magnetic follower or the movable member operates the pump.

Connectors are each integrated with a holder in a state in which bus bars are projected. A first projection and a second projection of the holder are respectively inserted in a first insertion hole and a second insertion hole in a circuit substrate. This determines positions of the holder and the circuit substrate relative to each other. The holder has coil lead wire insertion holes, capacitor lead wire insertion holes, and element lead wire insertion holes. These insertion holes extend in the same direction as the direction in which the bus bars project from the holder.

Positive displacement machine such as a compressor, expander, pump or the like, for displacing a gaseous or liquid medium, the machine containing an element with at least one inlet and at least one outlet for the medium and at least two cooperating driven moving parts. The mutual periodic movement of the moving parts displaces the medium from the inlet to the outlet. Each of the at least two driven cooperating moving parts is provided with its own individual drive. The element is provided with a kinematic synchronisation coupling between the at least two cooperating moving parts for the mutual kinematic synchronisation of their movements.

A motor-driven compressor includes an inverter that includes a circuit board and an electrical component, and an inverter cover that defines an inverter accommodating chamber together with an end wall of a motor housing member. The inverter accommodating chamber accommodates a first conductive member and a second conductive member. A first end of the first conductive member and a lead of the electrical component extend through the circuit board from a first surface, which faces the end wall, and are soldered to the circuit board on a second surface on a side opposite to the first surface. A first end of the second conductive member is electrically connected to a power supply connector. Second ends of the first conductive member and the second conductive member are mated to each other so as to be electrically connected to each other when the inverter cover is joined to the motor housing member.

A scroll compressor of vehicles includes a housing including a first opening to form a receiving space, a compressing mechanism, and an electrical machinery mechanism including a rotor and a stator. The electrical machinery mechanism, located in the receiving space, drives the compressing mechanism to rotates. A lower holder is fixed to an upper holder via the stator. The stator is coupled to a binding post by lead-out wires, and the binding post, away from a bottom wall of the housing, is located between an inner wall of the housing and an outer wall of the stator. The stator and the binding post are directly or indirectly installed to a same component, and a distance between an outlet of the lead-out wires and the binding post is constant during the assembling process of the binding post and the lead-out wires.

An electric compressor includes a housing, an inverter, an inverter case, a case bottom wall, and a case peripheral wall. The inverter case has a seal peripheral wall. The seal peripheral wall has a cylindrical shape and extends from the case bottom wall in a direction opposite to a direction in which the case peripheral wall extends. The seal peripheral wall surrounds a part of an outer peripheral surface of the housing. A seal member having an annular shape seals a gap between an inner peripheral surface of the seal peripheral wall and the outer peripheral surface of the housing.

An on-vehicle motor-driven compressor includes an inverter device having a noise reducer. The noise reducer includes a common mode choke coil. The common mode choke coil includes an annular core, first and second windings wound around the core, the second winding being spaced apart from and opposed to the first winding, an annular conductor that extends over the first winding and the second winding and covers the core, and an insulating layer located between an inner circumferential surface of the conductor and outer surfaces of the first winding and the second winding. The conductor is tubular and belt-shaped. The core includes an exposed portion that is not covered by the conductor. The insulating layer is tubular and belt-shaped. An entirety of the conductor is arranged within a range between opposite ends of the insulating layer.

A scroll compressor of an electrical refrigerant drive contains a housing having a low-pressure chamber, a high-pressure chamber, compression chambers and a counter-pressure chamber. A stationary scroll has a base plate and a spiral wall, the base plate of the stationary scroll delimits the high-pressure chamber. A movable scroll has a base plate and a spiral wall which engages into the spiral wall of the stationary scroll and forms the compression chambers with the spiral wall. The base plate of the movable scroll delimits the counter-pressure chamber. A first fluidic connection is provided which connects the counter-pressure chamber to the radially innermost compression chamber, and the first fluidic connection is located in a positioning region of the radially innermost compression chamber between 75° to 195° following the merge angle.

A system comprising an electric motor, a compressor configured to be driven by the electric motor, a plurality of valves in fluid communication with an output of the compressor, a rotor disposed adjacent the valves and configured to spin as the valves control fluid movement toward the rotor, and a magnet is coupled to the rotor and configured to spin within a stator, wherein the compressor causes fluid to move through the valves thereby causing the rotor to spin the magnet, which in turn generates an electrical current.