摘要:
A drive for a wheel set (1) of a chassis includes two wheels (3) positioned on a wheel set shaft (2), which can be driven by at least one internal rotor motor that encompasses the wheel set shaft (2) and has a stator (10) and a rotor (19). This configuration provides a compact direct drive.
摘要:
The invention relates to a holding brake for track-bound motor vehicles (1) with the holding brake being realized by means of at least one electric machine (2) which has a rotor and a stator. A control system for the electric machine is hereby provided to so control the operation of the electric machine (2) that the position of the rotor in the stator remains constant when exposed to an external torque. In other words, the electric motor (2) is used as holding brake instead of a pneumatic holding brake. In this way, the holding brake is advantageously not subject to any wear since the holding forces are produced magnetically and not by mechanical forces. In addition, no noise is generated by the use of the holding brake according to the invention. Furthermore, a starting jolt is prevented, when the electric motor (2) used as a holding brake is also used as a drive motor.
摘要:
In a method an inner segment is first pre-assembled on each of a number of outer segments by at least one fixing element, so as to produce a plurality of segment modules having each a predetermined air gap between the inner segment and the outer segment. The inner segments and the outer segments are assigned to the rotor or stator of the electrical machine. The inner segments of the plurality of segment modules are fastened to an inner assembly device (for example a hub). The outer segments of the plurality of segment modules are fastened to an outer assembly device (for example a supporting structure). Finally, the fixing elements between the inner segments and the outer segments are removed.
摘要:
A traction drive, in particular for rail cars, includes a permanent-excited synchronous motor, a traction converter with a pulsed inverter for powering the motor, and ohmic brake resistors. Cross-over switches are connected with a corresponding input terminal of the motor and can switch the input terminal between a corresponding output terminal of the pulsed inverter (for travel) and a terminal of a corresponding brake resistor (for braking). The brake resistors are electrically connected in a star configuration. The traction drive can operate with different supply voltages. There is no longer a need for a mechanical brake, and flat spots on the wheels can be prevented.
摘要:
The invention relates to an annular rotor having a hollow shaft for an electric machine. In order to allow transport of such a machine, particularly for a very large model, the rotor is divided in the circumferential direction into a plurality of partial annular rotor segments (1). The rotor further comprises a hollow shaft, wherein the closed ring shape of the rotor can be broken by separating the rotor segments (1) from each other.
摘要:
In order to be able to electric drives in very tight installation spaces, e.g. in propulsion vehicles or machine tools, an electric machine (1) is proposed having a stator and a rotor (28), with the laminations (2) of the stator have axial slots (4) and teeth (5, 6) extending between adjacent slots (4) in direction air gap. At least a predefined number of the teeth (6) is configured as a single-tooth winding (7), and at least one section (3) is provided in circumferential direction of the stator and is designed without slots but follows the contour of the stator bore (11) in the area of the air gap.
摘要:
The invention relates to a PM rotor having radial cooling slots and to a corresponding method of production. The aim of the invention is to provide a structurally simple rotor which has a high degree of efficiency. According to the invention, the rotor consists a plurality of partial laminated stacks (20) that are interspaced in the axial direction at a defined distance, thereby defining radial cooling slots (22). Permanent magnets (24) are arranged in every partial laminated stack (20) in inner pockets (23). The dimensions of every permanent magnet (24) in the axial direction does not or only insignificantly exceed the axial dimensions of the respective partial laminated stack (20). During assembly, the permanent magnets (24) can be axially pushed through the inner pockets (23) to the respective partial laminated stack (20). The invention allows to provide a rotor comprising radial cooling slots and inner permanent magnets which has a very high degree of efficiency.
摘要:
In a method an inner segment is first pre-assembled on each of a number of outer segments by at least one fixing element, so as to produce a plurality of segment modules having each a predetermined air gap between the inner segment and the outer segment. The inner segments and the outer segments are assigned to the rotor or stator of the electrical machine. The inner segments of the plurality of segment modules are fastened to an inner assembly device (for example a hub). The outer segments of the plurality of segment modules are fastened to an outer assembly device (for example a supporting structure). Finally, the fixing elements between the inner segments and the outer segments are removed.
摘要:
A rail vehicle has a powered bogie, wherein the powered bogie has driven wheels. Each driven wheel of the powered bogie can be driven by an electric machine, with a power converter being assigned to the electric machine. As a result, a separate power converter is assigned to each driven wheel.
摘要:
The invention relates to an annular rotor having a hollow shaft for an electric machine. In order to allow transport of such a machine, particularly for a very large model, the rotor is divided in the circumferential direction into a plurality of partial annular rotor segments (1). The rotor further comprises a hollow shaft, wherein the closed ring shape of the rotor can be broken by separating the rotor segments (1) from each other.