DE1613006B2 - COLLECTORLESS DC MOTOR - Google Patents

Description

1 2

The invention relates to a brushless connection of this yoke body as a winding body of a direct current motor with a diametrically polarized pearl or multi-layered helical winding.
Manentmagnetrotor and a stationary armature winding With such a winding arrangement, the development with several winding strands, which can be connected to a direct current source by forming thicker and transversely across the motor front of a control circuit one after the other to a DC area. motors of the type mentioned avoided.

A motor of this type is described in the magazine »The Every Winding Strand Becomes Practical In Itself Elektromeister ”, 1965, No. 17, pp. 1234 to 1236, as is well known from at least two of the paraphrases. In this motor, the stationary armature catch of the yoke body is one pole pitch or winding on a thin-walled plastic housing, ίο an integral multiple of it against each other serves as a bobbin, applied so that it is arranged and opposite each other geden Enclosing rotor magnets. The winding forms sinuous or opposite directions to each other at both ends of the motor winding heads, which are composed of a strand section, so that over the not inconsiderable increase in the overall length of the end faces of the motor, only individual connection motors entail. 15 connection lines between the string sections

There is also already a stator for polyphase leads.

electromagnetic induction devices known The winding phases are directly or preferred (USA.-Patent 3 187 211), in which a wise with the interposition of a layer of electrical ring-shaped, laminated iron body with one made of insulating material, for example a multiple of art Coils existing ring winding provided 20 fabric jacket, wound on the back yoke body, is. This stator construction, however, also functions as a support body for the winding part that the stator is grooved, serving in each groove, so that in general no additional dimensions Coil of the ring winding is arranged. Grooved were taken to fasten the winding who-Siators but inevitably result in an unequal.

moderate magnetic flux distribution over the whole area

fang and thus, in the case of a motor, a DC motor designed accordingly according to the invention

uneven torque, so that the rotor is shown schematically and will be explained in more detail below

Tends to jerk. explained. It shows

There are still electrical machines in motion. 1 is a schematic end view of a Knows (Swiss patent 4160), in wel- 30 DC motor with the winding according to the invention several ring windings evenly distributed arrangement arrangement,

are arranged on an annular 'core. It Fig. 2 is a central longitudinal section through the in

However, this concerns three-phase machines, the motor shown in FIG. 1.

with phase-shifted, sinusoidal alternating The motor shown in the drawing has voltages to be fed. While at 35 a disk-shaped permanent magnet rotor 1, the subject of the report is the winding phases by means of which is two-pole. This permanent control circuit is connected one after the other to a DC magnet rotor from a stationary, concentric current source, the individual winding strands are surrounded by circular magnetic flux yoke bodies, which are fed with square pulses, generally as a laminated iron and in the stator a trapezoidal, non-sinusoidal 40 ring is designed to create an eddy current to field distribution is sought to avoid current peaks. The yoke body 2 can, however, also be designed as a ferrite tube or ferrite ring for the commutation points, that is to say when switching.
from one winding strand to the other winding one in three evenly over the circumference of the winding strand, avoid. Motor distributed winding phases Ι-Γ, H-II ', IH-III'

A stepping motor is also known (the stator winding with a French stator winding is on the magnetic flux

French patent specification 1 236 687), in which a back yoke body is wound. Each of the three wick

Ring coil arranged on a ring segment core is in two, 180 ° on the circumference of the

is. This stepping motor, however, has a strand section offset from one another in rotors

radial direction magnetized rotor, the upper part of which is divided. The first section of the winding strand

surface is sawtooth-like, and the ring 50 begins at the winding input I and is about a

The segment core of the stator winding points to the return ring 2 in its two angular range of 60 °

the ends have pronounced magnetic poles that are not wound up. The end of this winding section

Ensure uniform magnetic flux distribution. is by means of a connecting line 3 with -the opposite-

The invention is based on the object over the end of the first section of the first

stationary armature winding of a DC motor 55 winding strand by 180 ° on the circumference of the back

of the type mentioned to be arranged so that the locking ring 2 offset beginning of the two-

Formation of strong and the length of the machine connected to the wrong section of this winding phase,

Larger winding heads are avoided and that the also extends over an angular range of 60 °

a uniform magnetic flux distribution over the circumference of the yoke ring and on the

entire circumference of the motor and thus the achievement of 60 winding output Γ ends. As shown in FIG. 1 visible

a good torque including excess is borrowed, the passes through a not shown

sectional synchronism is guaranteed. Control circuit successively in the individual winding

According to the invention, the problem posed is the second half of the direct current conducted by the strands solved by that the winding phases around a sta- the winding phase described above in tionary, the permanent magnet rotor concentrically 65 reverse flow direction as the first half surrounding, cylindrical or cylindrical ring-shaped this strand. Because one half of each winding magnetic flux return body From one strand of material, one north pole each and the other half with ferromagnetic properties using each winding strand one south pole of the

Permanent magnet rotor is opposite, in this way one in both winding sections torque acting in the same direction is generated.

The other two winding phases with inputs II and III and outputs ΙΓ and ΙΙΓ are divided in the same way into two sections, each offset from one another by 180 ° on the Return ring 2 are arranged and connected in opposite directions to each other. Each section of the three strands of winding covers an angular range of 60 ° of the return ring 2 and is generally separate attached to a winding machine. Then the ends and beginnings become one another associated strand sections connected to one another. To the back yoke body can be one of two Plastic housing composed of shell rings with axially parallel outer webs for structuring the Winding area in the individual strand sections assigned fields are provided, which the subsequent Make winding the strand sections easier.

The yoke body 2 can also be designed as an elongated cylinder and the windings can additionally be attached to the yoke body 2 by gluing. The motor is expediently multi-pole executed, whereby the angular displacement of the individual winding sections changes.

Claims (5)

Patent claims: 1. Brushless DC motor with a diametrically polarized permanent magnet rotor and a stationary armature winding with several winding phases that are controlled by means of a control circuit can be successively connected to a direct current source, characterized in that that the winding phases (Ι-Γ, ΙΙ-ΙΓ, ΙΙΙ-ΙΙΓ) around a stationary, the permanent magnet rotor (1) concentrically surrounding, cylindrical or a cylindrical magnetic flux yoke body (2) made of a material with ferromagnetic properties using this yoke body (2) as a winding body are wound in one or more layers in a helical manner. 2. DC motor according to claim 1, characterized in that each winding phase (Ι-Γ, ΙΙ-ΙΓ, ΙΙΙ-ΙΙΓ) from at least two over the perimeter of the return body (2) by a pole pitch or an integral multiple thereof offset from one another and wound in opposite directions or in opposite directions there is mutually connected strand sections. 3. DC motor according to claim 1, characterized in that the yoke body (2) is surrounded by a jacket made of electrically insulating material. 4. DC motor according to claim 3, characterized in that one of two as a jacket Plastic housing composed of shell rings with axially parallel outer bars for structuring the winding surface in the individual strand sections associated fields is provided. 5. DC motor according to one of claims 1 to 4, characterized in that the Magnetic flux return body (2) is designed as a ferrite tube or ferrite ring. 1 sheet of drawings