DE202008015201U1 - Coaxially arranged electric motor - Google Patents

Abstract

Coaxial arranged electric motor (10) comprising at least two to one Hollow axis (12) coaxially arranged energized stators (14, 24), via which permanently magnetically excited bells (20, 30) designed as rotors are, which rotate about the hollow shaft (12), characterized that the drive torque directly over the bells (20, 30) can be tapped off.

Description

The The invention relates to a coaxially arranged electric motor according to the Preamble of claim 1 specified type

Coaxial arranged engines have the advantage that by opposing Rotation of the attached propellers, the transmitted, resulting rolling moment small or even zero. This promotes, provided the drive as Aircraft drive is designed for stability and thus the flight characteristics of the aircraft.

From the company Maxx Products Intl. are coaxial electric motors known. For example, Himax CR2816

These are designed so that two energized stators coaxial with each other lie. Permanent magnetically excited rotors rotate around this axis. The moment of a first rotor becomes over a drive shaft, which through a hollow axis of a second stator leads tapped. The moment of the second rotor is tapped directly.

Of the previously mentioned engine has the disadvantage that the construction by the integration of the drive shaft is expensive. Furthermore will be additional Friction generated due to the necessary storage of the shaft.

Of the Invention is based on the object, a coaxial arrangement of Electric motors according to the im Preamble of claim 1 specified type while avoiding the educate mentioned disadvantages such that the arrangement constructive is simple and has low friction losses.

These The object is achieved by the characterizing features of claim 1 solved in conjunction with its generic features.

The under claims form advantageous development of the invention.

According to one first embodiment, a coaxial electric motor comprises at least two around a hollow shaft coaxial arranged energized stators. The stators are firmly connected to the hollow axle. Cover permanent magnetic bells the stators and rotate around the hollow axle. At each bell takes place the tap of the moment directly. The hollow axle thus serves only the Fixing the stators, and as a cable channel for their electrical cables.

Advantageous on the arrangement according to the invention is that no extra rotating waves are necessary. Because the integration of additional Shafts is mechanically complex, provides the arrangement according to the invention a significant simplification of the construction. In addition will be the friction losses to the, due to the additional necessary storage reduced losses. In addition, a more compact Arrangement of the two motors possible.

According to one further advantageous embodiment the motor is designed as an electronically commutated DC motor. DC operation offers the advantage that the engine is powered by a standard DC battery which makes the entire application mobile.

According to one particularly advantageous embodiment, the hollow axle of the motor is connected to a foot. This foot becomes one ensures easy installation of the coaxial electric motor. About that out is the foot with holes provided a cable gland the allow electrical wiring of a first stator.

Farther an embodiment is advantageous in which the foot is detachable with the hollow axle is connected. This allows for greater flexibility in the Maintenance of the coaxially arranged electric motor.

Furthermore It is beneficial to keep the foot unsolvable to connect the hollow axle. This ensures a higher stability. Further promotes it the compactness of the arrangement.

According to one further advantageous embodiment, the coaxially arranged electric motor is part of a drive of a Aircraft. This advantageously results in an improvement in the controllability of an aircraft in hover and fast flight. By doing that in a simple engine existing rolling moment is eliminated, are no rudder deflections necessary to compensate for the rolling moment. Therefore, a result bigger tax authority, because more Displacement margin is left to compensate for further disturbances. About that also allows this execution, a deliberate generation of a rolling moment around the motor axis.

Further Advantages, features and applications of the present Invention will become apparent from the following description in conjunction with the embodiments shown in the drawing.

The invention will be described in more detail below with reference to the embodiment shown in the drawing. In the description, in the claims and in the drawing are those in the un used in the list of reference numerals used terms associated with reference.

In the drawing means:

1 Exploded view of an electric motor in a coaxial arrangement;

2 Section view of an electric motor in a coaxial arrangement;

3 Side view of an electric motor in a coaxial arrangement;

4 Top view of an electric motor in coaxial arrangement, and

5 Isometric view of an electric motor in coaxial arrangement.

1 , shows an exploded view of a coaxially arranged electric motor 10 , which is suitable for the propeller drive. In this figure, the hollow axle 12 shown, on which a first stator 14 and a second stator 24 are attached coaxially. The electrical wires 28 for the second stator 24 lead through the interior of the hollow axle 12 , Through a recess in the hollow axle, the contacting of the outside of the hollow shaft 12 attached second stator 24 possible. The account of the first stator 24 takes place through the pipes 18 , These run through recesses of the foot 22 , 1 shows a permanent connection of the foot 22 with the hollow axle 12 ,

The hollow axle 12 serves in this way both as a cable channel and as a rotation axis for, over the stators 14 . 24 lying bells 16 . 26 , At the bells 16 . 26 is directly the torque on the attached to the bells propeller mount 20 . 30 tapped.

2 shows the sectional view of a coaxially arranged electric motor 10 , In addition, those are on the hollow axle 12 attached stators 14 . 24 to see, as well as the electrical supply lines 28 through the hollow axle 12 and the supply lines 18 by the foot 22 are guided. Furthermore you can see the bells 16 . 26 , as well as the second propeller mount 30 , In this figure is particularly good to carry the cable 28 from the second stator 24 in the interior of the hollow axle 12 to see.

3 shows a side view of the coaxial arranged electric motor. This clearly shows the particularly compact arrangement.

4 shows a plan view of the coaxially arranged electric motor 10 , Next to the second bell 26 this figure shows the second stator 24 , as well as the propeller shots 20 . 30 ,

5 shows the components 1 in an isometric view.

10

electric motor in a coaxial arrangement

12

hollow shaft

14

first stator

16

First Bell jar

18

electrical management

20

First propeller recording

22

foot

24

second stator

26

Second Bell jar

28

electrical supply

30

Second propeller recording

Claims (6)

Coaxial electric motor ( 10 ) comprising at least two about a hollow axis ( 12 ) coaxially arranged energized stators ( 14 . 24 ), over which permanently magnetically excited bells ( 20 . 30 ) are designed as rotors which are arranged around the hollow axle ( 12 ), characterized in that the drive torque directly through the bells ( 20 . 30 ) can be tapped. Coaxial electric motor ( 10 ) according to claim 1, characterized in that the electric motor is designed as an electronically commutated DC motor. Coaxial electric motor ( 10 ) according to claim 1 to 2, characterized in that the hollow axle ( 12 ) one foot ( 22 ) having. Coaxial electric motor ( 10 ) according to claim 3, characterized in that the foot ( 22 ) detachable with the hollow axle ( 12 ) connected is. Coaxial electric motor ( 10 ) according to claim 3, characterized in that the foot ( 22 ) insoluble with the hollow axle ( 12 ) connected is. Coaxial electric motor ( 10 ) according to the preceding claims, characterized in that the electric motor is used to drive aircraft.