The present disclosure is directed to a method for generating power for a machine. The method may include inverting a common power at a first location and outputting a first inverted power. The method may further include inverting the common power at a second location, outputting a second inverted power, and shifting an operational phase of the second inverted power so that the first inverted power and the second inverted power are in phase. The method may further include passing the first inverted power to a transformer, passing the second inverted power to the transformer, and transforming the first inverted power and the second inverted power to a transformed power.

A mechanically commutated electric motor is at least partially arranged in a closure apparatus for a housing. The closure apparatus includes at least a first rod-like throttle coil and a second rod-like throttle coil which are wound in opposite directions with coil wire and which are arranged parallel to one another. The first throttle coil is electrically directly coupled to a first coupling element provided for electrical coupling to the mechanically commutated electric motor, and the second throttle coil is electrically directly coupled to a second coupling element provided for electrical coupling to the mechanically commutated electric motor, such that, when the mechanically commutated electric motor is connected to the coupling elements and the mechanically commutated electric motor is operated, the magnetic fluxes (Phi1, Phi2) in the first throttle coil and second throttle coil at least partially compensate one another.

An actuator includes a circuit board having an electromagnetic interference (EMI) reduction circuit. The actuator includes a motor having a motor casing mounted on the circuit board. A portion of the motor casing contacts a surface of the circuit board. The actuator includes an electrical contact conductively coupled to the EMI reduction circuit and mounted on the surface of the circuit board. The electrical contact establishes a conductive path between the EMI reduction circuit and the motor casing when the motor casing is mounted on the circuit board.

A commutator has a conductive layer, a segment layer and an insulating layer separating the conductive layer and the segment layer. The segment layer includes multiple commutator segments. A mounting hole is defined along an axis of the commutator passing through the conductive layer. The three-layer structure of the commutator forms a capacitor having an increased confronting area and reduced inter-plate distance. The capacitor thus has a greater capacitance and hence greater EMI absorbing capability, making it possible to reduce EMI emissions without additional EMI reduction components outside the commutator. A rotor and a motor employing the commutator are also disclosed.

A commutator has a conductive layer, a segment layer and an insulating layer separating the conductive layer and the segment layer. The segment layer includes multiple commutator segments. A mounting hole is defined along an axis of the commutator passing through the conductive layer. The three-layer structure of the commutator forms a capacitor having an increased confronting area and reduced inter-plate distance. The capacitor thus has a greater capacitance and hence greater EMI absorbing capability, making it possible to reduce EMI emissions without additional EMI reduction components outside the commutator. A rotor and a motor employing the commutator are also disclosed.

An inverter-integrated electric compressor for which an inverter device is integrally incorporated, with a main circuit board being housed while the four corners thereof are supported by boss parts at locations above high-voltage electrical components and semiconductor switching elements. The multiple high-voltage electrical components are arranged in parallel along one side of the main circuit board at one side of an inverter housing part, with one side of the main circuit board being supported from below by the upper surface of these components. The multiple semiconductor switching elements are arranged in parallel along the other side opposing the one side of the main circuit board, at the other side of the inverter housing part, with the other side of the main circuit board being supported from below by multiple lead terminals extending upwards.

There is provided an integrated electric compressor that can be made small in size while reducing radio noise effectively. In an inverter of the electric compressor, a snubber circuit 21 comprising a resistor R and a capacitor C is provided between input/output terminals 20 of a power source and a switching element 18. The snubber circuit 21 is formed by surface mounting a resistive element constituting the resistor R and a capacitor element constituting the capacitor C on a power board 16. A leakage current from a motor 19 is thus restrained and radio noise is reduced. The resistive element and the capacitor element constituting the snubber circuit 21 are preferably surface mounted on the power board 16 on the side opposite to the side on which a control circuit board is arranged.

A motor may include a housing, a motor assembly accommodated in the housing, and a mold cover having an outer circumferential surface. The outer circumferential surface may be coupled to the housing, which has electrical conductivity. A noise filter is provided in the mold cover. A ground terminal of the noise filter is electrically connected to the outer circumferential surface of the mold cover.

An object is to release heat efficiently to heat-resistance abilities of individual components by enhancing a heat-radiation performance of power circuit components forming a power module (100) and by enhancing a heat generation balance. The power circuit components formed of power switching elements (107 and 108) forming a bridge circuit and a motor relay switching element (109) are mounted on conductive members (102) while a heat generation balance is maintained. Then, the conductive members (102) are disposed on a heat-releasing heat sink (30) by abutment, and the power circuit components and the heat sink (30) are integrally molded using mold resin (101).

An electric machine with at least one electrical resistor (24) for dissipating shaft voltages occurring at the rotor shaft (2) of a rotor (1), in which the electrical resistor (24) is enclosed in a contact ring (13) mounted on the rotor shaft (2) between contact surfaces (17, 23, 25, 28, 29) applied to the contact ring (13) on the outside, and in which the resistor (24) is electrically connected via the contact surfaces (17, 23, 25, 28, 29) to the rotor shaft (2) on one side and to the excitation winding (14) of the rotor (1) on the other side.