The invention relates to a method (100) for electrically contact-connecting a winding (40) of an electrical machine (1) to a printed circuit board (92), wherein the electrical machine (1) has an armature (10) with a large number of teeth (20), wherein at least one winding (40), which is formed by an electrical conductor (42), is formed on one of the teeth (20). The method comprises the following steps: routing (110) the conductor ends (45) of the electrical conductor (42) out of the armature (10) in the axial direction of the electrical machine (1), shortening (115) the conductor ends (45) to the same length, routing (120) the conductor ends (45) through in each case one passage opening (67) in a centring element (66), wherein the centring element (66) has a centring means (69) which centres and orients in parallel the routed-through conductor ends (45), wherein the routed-through conductor ends (45) emerge from the centring element (66), routing (125) the conductor ends (45) through in each case one passage opening (73) in a sealing element (72), wherein the routed-through conductor ends (45) emerge from the sealing element (72), inserting (130) the centring means (69) into in each case one passage opening (73) in a sealing element (72), arranging (135) the sealing element (72) at least partially within a passage opening (6) in a housing element (5), and electrically contact-connecting (140) the conductor ends (45) to the printed circuit board (92).

A drive motor for a suction tool (400) or a machine tool in the form of a hand-held power tool (200, 300) or a semi-stationary machine tool. The drive motor (20, 120) has a stator (80) with an excitation coil assembly (86) and a rotor (40, 140) with a motor shaft (30, 130) which is rotatably mounted on the stator or relative to the stator (80) about a rotational axis (D) by means of a bearing assembly (24A), and the drive motor (20, 120) has a connection device (100) for electrically connecting the drive motor to an energizing device (206, 306) for energizing the excitation coil assembly (86). The connection device (100) has a main part (103) for securing to the stator (80) and a receiving arm (108) which protrudes from the main part (103), a conductor receiving area (107) being formed between the main part and the receiving arm for at least one electric coil conductor (88) of an excitation coil (87) of the excitation coil assembly (86). The connection device (100) has a connection contact region (101) for electrically connecting a connection line (15) for connecting to the energizing device (206, 306).

A system including a first drive motor (120) and a second drive motor (20). The drive motors (20, 120) are provided for a suction device (400) or a machine tool in the form of a hand-held power tool (200, 300) or a semi-stationary machine tool or form components of the suction device (400) or the machine tool. Each of the drive motors (20, 120) has a stator (80) with an excitation coil assembly (86) and a rotor (40, 140) with a motor shaft (30, 130) which is rotatably mounted about a rotational axis on the stator or relative to the stator (80) using a bearing assembly (24A) and which passes through a shaft through-opening (42, 142) of a laminated core (41, 141) held on a holding portion (33) of the respective motor shaft (30, 130).

A stator of an electrical coolant drive includes a stator assembly having a number of stator teeth that are provided with coils of a multi-phase stator winding, and a contact device disposed on the stator assembly on an end side for interconnecting the coils with the phase connections. A deflection region is provided on the outer periphery of the contact device in the region of an inlet of the coolant drive for a fluid flowing in through the inlet. A contact device and an electric coolant drive are also provided.

A method for producing an electric motor includes: connecting a first phase coil of three-phase coils to a positive side of a source of electrical power for magnetizing; passing an electric current through the three-phase coils in a state where a center of a magnetic pole of a rotor is rotated a first angle with respect to a center of a magnetic pole of the first phase coil; switching a connection with the positive side of the source of electrical power from the first phase coil to a second phase coil; and passing an electric current through the three-phase coils in a state where the center of the magnetic pole of the rotor is rotated a second angle with respect to a center of a magnetic pole of the second phase coil.

A stator includes a stator core disposed about a central axis and covered by an insulator, coils installed on the stator core through the insulator, and an intermediate bus bar electrically connected to a portion of a conducting wire constituting the coils. A method of manufacturing a stator includes a mounting process, a winding process, and a connecting process. An intermediate bus bar is supported at a first position spaced apart from a coil in an axial direction in a mounting portion before the start of the winding process. The intermediate bus bar is fixed at a second position between the first position and the coils in the axial direction after the completion of the winding process.

In a stator, coils of a plurality of phases are wound around a stator core via an insulator. A guide member is provided on one side of the stator core in the axial direction and guides the terminal line of the coil in the circumferential direction at a position overlapping the coil in the axial direction. The guide member has a notch that penetrates in the axial direction in a shape having a guide portion extending radially inward from the radially outer end portion of the guide member and leads the terminal line to one side in the axial direction. End surfaces in the radial direction of the notch, and a bottom part which is one end surface in the axial direction of the guide member is drawn in the circumferential direction, are connected by the recessed part having a recessed shape.

A stator of a brushless motor has an iron core, a bobbin, and a winding assembly. The iron core has multiple stator poles mounted on an interior annular surface of a core body and spaced apart from each other. The bobbin is mounted on one of two open ends of the core body and has a substrate, at least one neutral connector mounted on an upper surface of the substrate, and at least one neutral solder pad mounted in the at least one neutral connector. The winding assembly is formed by one wire wound on multiple stator poles and the connectors. The winding assembly is electrically connected to the at least one neutral solder pad.

Provided is a terminal device for a rotary electric machine, in which a plurality of conductive members, each having a first connecting portion having a flat plate shape, are provided to a base made of an insulating material. Each of a plurality of connection terminals has a second connecting portion having a flat plate shape. The second connecting portion is connected to a corresponding one of the first connecting portions. After a processed connecting portion being at least any one of the first connecting portion and the second connecting portion is formed through press-working performed for a conductive flat plate, compression processing is performed for a front surface and a back surface at both ends of the processed connecting portion in a width direction of the processed connecting portion.

A terminal assembly of an electric machine includes an electric machine housing including a terminal opening defined in the electric machine housing. A conductive terminal extends through the terminal opening, from an inside of the electric machine housing to an outside of the electric machine housing. An insulator is located at the terminal. The insulator is positioned between the terminal and a housing wall of the terminal opening. The insulator is sized and configured for installation into the terminal opening after installation of the terminal in the terminal opening.