The present disclosure relates to mechanical braking mechanisms used in electric motor applications. The present braking mechanisms may be configured as non-back-drivable mechanical brakes and provide immediate braking of the motors. According to one embodiment, a mechanical brake assembly for an electric motor may include a female disk including a groove and an abutment and a male disk including a projection, the male disk being in mechanical communication with a rotor of the electric motor. When the electric motor is energized, the projection of the male disk is configured to rotate with the rotation of the rotor of the electric motor, but when the electric motor is de-energized, the projection of the male disk is configured to travel within the groove of the female disk and abut the abutment of the female disk, thereby reducing the rotation of the rotor of the electric motor.

The present disclosure relates to mechanical braking mechanisms used in electric motor applications. The present braking mechanisms may be configured as non-back-drivable mechanical brakes and provide immediate braking of the motors. According to one embodiment, a mechanical brake assembly for an electric motor may include a female disk including a groove and an abutment and a male disk including a projection, the male disk being in mechanical communication with a rotor of the electric motor. When the electric motor is energized, the projection of the male disk is configured to rotate with the rotation of the rotor of the electric motor, but when the electric motor is de-energized, the projection of the male disk is configured to travel within the groove of the female disk and abut the abutment of the female disk, thereby reducing the rotation of the rotor of the electric motor.

An induction motor assembly includes an induction motor, and one or more switches coupled to selectively inhibit the supply of power from a power source to at least one of a main winding and an auxiliary winding of the motor. A control circuit is configured to obtain a main winding voltage value representative of a voltage across the main winding, receive an auxiliary winding voltage value according to a sensed voltage across the auxiliary winding, and determine at least one of a rotational speed of the induction motor and a load of the induction motor, according to the main winding voltage value and the auxiliary winding voltage value. The control circuit is configured to control switching operation of the one or more switches according to the determined rotational speed or the determined load, or generate a log of the determined rotational speed or the determined load in memory for monitoring.

The disclosure relates to the technical field of motor driven, and in particular to a current-controlled motor. The motor includes a rotator assembly, a stator assembly, external connectors and bearings, wherein the stator assembly is in driven connection with the rotator. And the rotator assembly is connected with the bearings which connected with the external connector. Two capacitance structures are formed by the outer surfaces of the two ends of the rotator assembly and the inner surface of the relative position of the external connector with air gap between them.

The disclosure relates to the technical field of motor driven, and in particular to a current-controlled motor. The motor includes a rotator assembly, a stator assembly, external connectors and bearings, wherein the stator assembly is in driven connection with the rotator. And the rotator assembly is connected with the bearings which connected with the external connector. Two capacitance structures are formed by the outer surfaces of the two ends of the rotator assembly and the inner surface of the relative position of the external connector with air gap between them.

A turbomachine having a rotor assembly, a stator assembly and a toroidal inductor. The rotor assembly includes an impeller. The inductor is located between the impeller and the stator assembly, and is exposed to an airflow generated by or acting upon the impeller.

A turbomachine having a rotor assembly, a stator assembly and a toroidal inductor. The rotor assembly includes an impeller. The inductor is located between the impeller and the stator assembly, and is exposed to an airflow generated by or acting upon the impeller.

A submersed electric motor includes a stator assembly arranged within an annular insulation chamber, and a stator with stator windings and a capacitive electric starter which is connected electrically thereto.
The insulation chamber is formed between an outer tubular jacket, an inner tubular jacket, which is coaxial to the outer tubular jacket, with two annular end covers adapted to close the annular interspace between the outer jacket and the inner jacket.
The submersed electric motor further includes a rotor arranged inside the inner tubular jacket.
The capacitive electric starter includes at least two capacitors, which are mutually complementary, and have a transverse cross-section with an arc-like profile and are connected in parallel to each other.

A tool comprising a drive-in element, transferring a fastening element into a substrate along setting axis by a setting energy E.sub.kin, a drive for driving the drive-in element along the setting axis, the drive comprising a capacitor, a rotor, and a coil, wherein current flows through the coil generating a magnetic field accelerating the drive-in element toward the fastening element, wherein a current intensity A.sub.coil of current flowing through the excitation coil while discharging the capacitor has a time profile with a rising edge, a maximum current intensity A.sub.max and a falling edge, A.sub.coil rising during current rise time Δt.sub.rise from 0.1 to 0.8 times A.sub.max and during impact time Δt.sub.impact is more than 0.5 times the A.sub.max, wherein Δt.sub.rise is at least 0.020 ms and at most 0.275 ms and/or the impact time Δt.sub.impact is at least 0.15 ms and at most 2.0 ms.

A motor includes a stator with a first stator, a second stator, and a third stator, each including at least one stator coil, and a rotor including a magnetic element, a first bearing, a second bearing, and a shaft, the stators generating a superimposed magnetic field together causing the magnetic element to rotate. When the magnetic element rotates in the first plane, the outer ring of the first bearing rotates. The center of the first bearing is located in a plane where the second bearing is located, and when the magnetic element rotates in the second plane, the inner ring of the second bearing rotates. A central axis of the shaft passes through the center of the first bearing; wherein the shaft is rotatably fixed to the first bearing and connected to the second bearing.