DE102004009077A1 - Electric motor for use as torque converter, has eccentric discs supported on support hub, and permanent magnets mounted on circumference of discs, where each disc is supported on eccentric disc support and is shifted to specific angle - Google Patents

Abstract

The motor has an output shaft (1) connected to a support hub (8), and eccentric discs (6) supported on the hub. Each disc is supported on an eccentric disc support (10) and is shifted to about 180 degrees. Permanent magnets (4, 5) are mounted on the circumference of the discs. Torque from the discs is transmitted to a spindle on the hub. Axle of the hub is concentric with the hub axis.

Description

The The invention relates to an electric motor.

transmission are commonly known as torque torque converters.

From the DE 44 28 441 A1 An eccentric gear is known in which act between the inside of the housing and the eccentric disc magnetic forces. The maximum transmissible by this transmission torque is limited by the magnetic forces. It is therefore proposed on column 2, line 45 ff, to use electromagnets with which then the maximum transmittable torque is controllable.

Of the Invention is based on the object, a converter of electrical Energy in mechanical torque in the most compact form.

According to the invention Task in the electric motor according to the features specified in claim 1 solved.

Essential features of the invention in the electric motor are that it comprises stator windings and rotatably arranged permanent magnets, wherein the permanent magnets are provided on an eccentric disc, which has bores for axes of a carrier hub,
the axes being concentric with the axis of the carrier hub.

From The advantage here is that the electric motor can be made very compact is and thereby a high mechanical torque can be generated. At the same time a low speed provided on the output side, if one this speed is related to which of the period of the electrical energization of the stator windings. Thus, the speed is maximum deliverable torque of the electric motor is so low that a gear connected to the electric motor is not necessary is. Of course but is it possible a transmission with the electric motor to further reduce the speed and increase to connect the torque. The special advantage of compactness However, the electric motor as drive is best for direct drives, ie direct connection of the electric motor with the driven Last, to bear.

at an advantageous embodiment is a further eccentric provided offset by an angular amount. It is advantageous that an imbalance compensation is feasible.

at In an advantageous embodiment, the carrier hub with a shaft, in particular Output shaft, connected. The advantage here is that the abortive Wave not one piece must be made but from several components manufacturable is. Thus, material can be saved during machining. The output shaft is either as a hollow shaft or as a solid shaft executable.

at a further advantageous embodiment, the further eccentric also magnets on their circumference. The advantage here is that the torque can be doubled and additionally the imbalance at the same time is compensable.

Further Advantages emerge from the subclaims.

1

wave

2

Teeth of the laminated core

3

stator windings

4

permanent magnet

5

permanent magnet

6

eccentric

7

camp

8th

support hub

9

axes

10

Exzenterscheibenlager

11

flange

12

Mounting screw hole

The Invention will now be explained in more detail with reference to figures:

In the 1a and 1b a device according to the invention is drawn in longitudinal and cross section.

The wave 1 carries the carrier hub 8th , on the turn eccentric discs 6 are stored at their periphery with magnets 4 . 5 are equipped, wherein the circumferentially successive magnets 4 . 5 have different magnetization directions. In particular, it is advantageous, for example, to magnetize the magnets in the radial direction, so that an alternating sequence of north and south poles is provided on the circumference. Each eccentric disc is eccentric to the shaft 1 provided and on eccentric disk bearings 10 stored.

The carrier hub 8th is positively connected. In another embodiment of the invention Examples, a non-positive connection is advantageous. In other embodiments of the invention, the shaft 1 with the carrier hub 8th one piece executable.

The stator has a laminated core with teeth and grooves. In the grooves is the stator winding 3 provided, which are indicated only symbolically in the figures. The tooth heads 2 of the laminated core are integrally formed with the teeth. In further embodiments of the invention, however, the tooth heads are also executable so that they can be attached to the teeth. Thus, in the manufacture of the first stator winding on the tooth wound or the entire winding can be plugged and then the tooth head on the respective tooth attachable.

Consequently is provided at the periphery of the stator, a plurality of electromagnets, each of which can be energized.

Depending on the current supply of the stator windings 3 the magnetic forces act in such a way that the eccentric disc 6 performs a rolling movement, but without coming into contact with the tooth heads during this rolling. Thus, there is no friction against the stator. The stator windings are to be energized accordingly, in particular, the current direction of the respective windings to alternate.

The eccentric disc has holes in which the axes 9 by means of bearings 7 are stored. The axes 9 are with the carrier hub 8th connected and to the axis of the shaft 1 arranged concentrically. Thus, the rolling movement of the eccentric disc leads to a rotational movement of the shaft 1 , So torque is generated.

A second eccentric disc 6 is also on the axles 9 the carrier hub 8th provided offset by a winding amount, for example, advantageously 180 ° offset. Thus, the imbalance of the former eccentric discs is compensated.

On the output side, the electric motor has a flange attachment 11 and mounting tapped holes 12 on, which are used for alignment and positioning of the device to be connected. In particular, the fastening threaded holes 12 can also be used as a torque arm.

In further embodiments of the invention instead of in the camps 7 mounted axles 9 also simple drive rollers usable.

In further embodiments of the invention, the second eccentric without magnets 4 . 5 executable. Thus, then there is a mere unbalance compensation, wherein the cost of the magnets can be reduced.

at further embodiments of the invention is the electric motor as a flange, foot or hollow shaft design with torque arm be provided. Also an execution as Aufsteckmotor is providable, so as an electric motor with its hollow shaft can be attached to a solid shaft to be driven.

In further embodiments of the invention, the electric motor is operable as a generator. This is torque over the shaft 1 fed to the electric motor and dissipated electrical energy from the stator winding.

Claims (10)

Electric motor, comprising stator winding and rotatably arranged permanent magnets, characterized in that the permanent magnets are provided on an eccentric disc which has bores for axes of a carrier hub, wherein the axes are provided concentric to the axis of the carrier hub Electric motor according to at least one of the preceding Claims, characterized in that a further eccentric disc to a Offset angle is provided, in particular for unbalance compensation. Electric motor according to at least one of the preceding Claims, characterized in that the angular amount is 180 °. Electric motor according to at least one of the preceding Claims, characterized in that the carrier hub with a shaft, in particular output shaft, connected is. Electric motor according to at least one of the preceding Claims, characterized in that the further eccentric disc also Magnets on its circumference. Electric motor according to at least one of the preceding Claims, characterized in that the electric motor can be operated as a generator is. Electric motor according to at least one of the preceding claims, characterized in that the eccentric disc via a bearing to the shaft 1 is stored out. Electric motor according to at least one of the preceding Claims, characterized in that of at least one eccentric disc Torque over Axles transferable to the carrier hub is. Electric motor according to at least one of the preceding claims, characterized in that the shaft 1 is a solid shaft or a hollow shaft. Electric motor according to at least one of the preceding Claims, characterized in that the housing has a flange attachment, in particular with fastening threaded bores.