JPS59162760A - Comosite linear motor - Google Patents

Abstract

PURPOSE:To reduce the size and to improve the responding characteristic due to the reduction in weight by commonly providing a core which occupies a large part of size or weight of a motor. CONSTITUTION:A stator 1 of a linear pulse motor has two gear trains 11, 12 in such a manner that the teeth of the trains 11, 12 are displaced at the pitch of the teeth. A movable element 2 has four leg poles P1-P4, four exciting coils C1-C4, two permanent magnets 21, 22 and a yoke 23. The coils C1 and C3, C2 and C4 are respectively connected in series. 3-phase AC windings 13, 14 are provided in the slots of the teeth of the trains 11, 12 of the stator 1, and a movable magnetic field is generated in this manner. Conductors 5 of segment shape are provided in the slots of the teeth of the poles P1-P4.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a composite linear motor having both the functions of a linear pulse motor and a linear induction motor.

Traditionally, a linear pulse motor (hereinafter referred to as LPM) and a linear induction motor (hereinafter referred to as LIM) are combined to take advantage of the advantages of both, and when you want to reach a predetermined position quickly, you drive in the continuous mode of the LIM, which allows you to accurately reach a predetermined position. LP when stopping
A combined LPM and LIM linear motor (hereinafter referred to as LHM) that can be switched to M step mode has been developed. Some of these configurations are simply a combination of two motors, but various smaller versions have been developed that share the primary and secondary sides of both motors, but increasing the degree of sharing reduces the original performance. Therefore, there are various structural difficulties in miniaturization. For example, this invention is based on the LPM, and includes a three-phase AC winding that generates a traveling magnetic field in the tooth groove of the LPM, and a secondary conductor in the corresponding tooth groove, without deteriorating its performance. It forms a LIM with sufficient performance, and is almost the same as the conventional L P M O>'C size.
It provides HM.

Next, embodiments of the present invention will be described based on the drawings. FIG. 1 is a perspective view of a composite linear motor of the present invention. First, let's talk about the LPM section of this motor. 1 is L
The PM stator is equipped with two tooth rows 11 and 12, and the teeth in both tooth rows are staggered in pitch. 2 is LPM
The mover has four leg poles PI, P2. P3. P4. 4 excitation coils CI, C2, C3, C4, 2 permanent magnets 2
1.22, and a yoke 23. Excitation coil C1
and C3, C2 and C4 are each connected in series.

As shown in FIG. 2, a plurality of small teeth having the same dimensions and the same pitch as the teeth of the stator are provided at the lower end of each of the leg poles P1 to P4. The movable element 2- is supported by a linear motion bearing or the like (not shown) with respect to the stator 1 so as to be movable in the left-right direction with a constant gap g maintained therebetween. This L
PM is the current sent to exciting coils C1, C3, C2, and C4.
With two-phase excitation, it is possible to move with the same step width.

Next, let's talk about the LIM section. As shown in FIG. 1, tooth grooves Fc of tooth rows 11.12 of stator 1 and three-phase AC winding 13.
14 is provided to generate a moving magnetic field.
An example of this three-phase winding in which the primary side of
It is shown in the figure. In the figure, P is the ball pitch and τ is the tooth pitch. Although three-phase alternating current is used in this example, the present invention is not limited to this. There is a second groove in the teeth of the leg poles P1 to P4.
As shown in the figures and in FIG. 4, segment-shaped conductors 15 are provided and short-circuited at their ends, forming, together with the teeth, the secondary side of the LIM. This LIM is connected to a commercial frequency (e.g. 50 c
ps), the speed of the moving magnetic field (synchronous speed) is 100 p/s or 30 p/s, as is clear from Figure 3.
0τ/sIL. In I and IM, the secondary current flows along the segments and short circuits, so a larger thrust can be obtained than in a general LIM in which the secondary conductor is a single metal plate or is supported by an iron plate or the like.

As is clear from the above description, the composite linear motor of the present invention is more compact than conventional composite linear motors with the same output by sharing the iron core, which accounts for a large portion of the motor's size and weight. , it has a great effect on improving response time and saving materials by reducing the amount of M.

[Brief explanation of drawings]

The attached drawings show embodiments, and FIG. 1 is a perspective view of the compound linear motor of the present invention, and FIG. 2 is a perspective view of the leg pole P3 of FIG. 1.
, an explanatory diagram showing a cross section of the tooth row 12, FIG. 3 is a wiring diagram of the three-phase AC windings provided on the stators 11 and 12, and FIG. 4 is a diagram of the secondary conductor of the LIM provided at the lower end of the leg. FIG. (Explanation of symbols representing main parts of the drawing) 1... Stator, 2... Mover, 11, '12...-
Teeth row, 13.14... Three-phase AC winding - 15... Secondary conductor of LIM, PI~P4... Leg pole, C1~c4... Exciting coil patent applicant AMADA CO., LTD. -shame

Claims (1)

[Claims] The linear pulse motor is characterized in that the stator teeth of a permanent magnet type linear pulse motor are provided with multiphase AC windings that generate a moving magnetic field, and the mover teeth of the linear pulse motor are provided with a good conductor. A composite linear motor consisting of a pulse motor and a linear induction motor.