JPS60176473A - Permanent magnet rotor type synchronous motor - Google Patents

Abstract

PURPOSE:To readily control the rotating direction at a starting time by controlling a current flowed to an armature winding within the prescribed time from the closure of a switch, and controlling in both directions after the prescribed time is elapsed. CONSTITUTION:When a switch is closed, a differentiator 11 applies positive polarity pulse information to switch ON number detecting means 11 and time measuring means 14. Odd number detecting means 18 and even number detecting means 19 turn ON a thyristor 22 when the number of ONs of the switch is odd and a thyristor 23 when the number of ONs is even to decide the rotating direction of a rotor 1. The means 14 close the switches 22, 23 after the prescribed time is elapsed to accelerate the speed of the rotor 1. When the switch is opened, the differentiator 11 applies a negative polarity pulse to the means 13 to interrupt the thyristors 22, 23.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a permanent magnet rotor open space motor with an output of several watts to several 1-watts, which is used as a drive source for household equipment such as a small orange squeezer. .

Conventional Structure and Problems Conventionally, Meimei electric motors using permanent magnet rotors have been used in small home-use orange squeeze juicers and the like.

Figure 1 shows its simple configuration. In Figure 1, 1 is a cylindrical permanent magnet magnetized with two poles in the angular direction of the rotation axis 2d.
3 is a stator core (hereinafter simply referred to as a stator), 4 is an armature winding wound around the stator 3, and 6 is an armature winding 4. This is a switch that controls the flowing current.

When the switch 5 is closed in the configuration described in item 1, an alternating current flows through the armature winding 4, and an alternating magnetic flux is generated in the stator 3. Then, two N-pole or S-pole magnetic poles are generated alternately on the stator end faces 3a and 3b. An attractive or repulsive force is generated between these magnetic poles and the magnetic poles magnetized on the rotor 1, and the rotor 1 begins to rotate.

Figure 2 is an enlarged view of the stator end faces 3a and 3b (near J), where the magnetic field generated on the stator end faces sa and sb during the IR during starting rotation exerts a repulsive force on the trochanter 1. It is.

(-E) on the rotor 1 as shown in FIG.
Points A, B, C, DKM<repulsive forces Fa, Fb.

Fc', Fd as a circumferential component Fa1. Fbl,
Fc.

Fdl and the axial component Fa2. Fb2. Fc2. Fd2
The repulsive force acting on points A and C is a couple Fa1. which rotates the rotor 1 clockwise. Fal occurs and point B
The repulsive force acting on the points is a force couple Fb1. which rotates the rotor 1 counterclockwise. Fdl is occurring.

Then, two pairs of couples (FaI +F c 1) and (Fb
If the magnitudes of 10Fd1) are the same, the torque acting on the rotor 1 becomes zero, and the rotor 1tri+h remains static.

Here, if the balance of the two pairs of forces is disturbed by making the air gap between the rotor 1 and the stator end faces 3a, 3b uneven, or by applying force to the rotor 1 from the outside, the rotation Child 1 is (Fa1+ Fc)〉(Fbl-1-Fdl)
In the case of clockwise, (Fbl-1-Fd 1)
> (Fal-1-Fc, ), Ku starts rotating counterclockwise.

In this way, the rotation direction at the time of starting is determined by the magnitude relationship of the two pairs of couples, and as long as current continues to be co-supplied to the armature winding 4, the 1111 trochanter 1 will rotate in the direction of rotation at the time of starting. last.

Then, when the switch 5 is turned off, the magnetic flux generated in the stator 3 is demagnetized, the magnetic force acting between it and the rotor 1 disappears, and the rotor 1 stops.

However, its stopping position is not constant, and the positional relationship between the rotation (-1) and the stator 3 is, for example, as shown in Fig. 3 (a, f).
2)), ic), 1d)K are various as shown.

In addition, as shown in FIG.
, 3blJ, 1JO3, N 4dan, S 41i.

Therefore, even if you try to start rotating the rotor 1 by applying current to the winding 4 of the electric machine on the next occasion, due to the magnetic relationship between the rotor 1 and the stator 3 at 1j, li, 116 Start rotating in any direction: 2 clockwise 2 counterclockwise 6" clockwise! There was a problem that l1IJ became "J'fk" and that only the direction of rotation could be controlled.

Nagairi magnet times'k f pear same 1s 1 den! l1Ij machine start mJ
The reason why the rotation Jj times at J time is undecided is, like lf'lj small, the rotation J-1 of stop 1 and the exhalation t of fixed 1ri 3.
? This is because the polarity of the magnetism (192) generated on the end face of the stator when the switch is turned on is also not fixed.

Therefore, in order to control the rotation ()j direction of this type of jυ1 Densen machine, it is necessary to keep the magnet A192 excited in the stator 3 constant for a certain period of time after turning on the switch, and to It is preferable to give a direction of rotation, and then set the magnetic poles excited in the stator 3 alternately as Nlt and S poles to perform steady rotational motion.

Purpose of "Departure" The wooden starter L(l-) solves these conventional problems, without damaging other characteristics as an electric motor, and without losing the original advantage of having a 17iT structure. , a permanent 11 wabi (11 wabi) that controls the rotation direction at startup and can be used as a driving source for equipment such as small orange users.
Rotating f pear +01 electric! The purpose is to provide a 11IJ machine.

In order to achieve the purpose described above, the permanent magnet rotation 1'-11i'1 of the Domei electric motor has the magnetic pole 26 (i').
a stator, an armature winding that magnetizes the stator, and a rotor that is rotatably supported and has permanent magnet poles, DO: A plurality of thyristors that control the direction of current flowing through the heavy armature windings, a switch-on detection means for detecting the on/off state of the switch, a switch-off detection means, and a number of times the switch is turned on as a gate circuit for these thyristors. A time measurement means that outputs information after a certain period of time after the switch is turned on and stops its operation when the switch is turned off; and a time measuring means that outputs information only when the switch is turned on an odd number of times and its operation when the switch is turned off. an odd number detection means for stopping the operation, an even number detection means for outputting information only when the switch is turned on for an even number of times, and stopping the operation when the switch is turned off; It is composed of a plurality of synthesis means for synthesizing information with the means, and each time the switch is turned on, the number of times detection means and the number of even number detection means operate alternately, so that the direction of rotation is reversed. This is how it was done.

Description of examples FIG. 6 shows a block diagram of an embodiment of the Raiko 1!11.

In Figure 6, parts that have the same function as those in Figure 1 are labeled with the same number, and explanation 1 is omitted here.

In FIG. 5, 10 is a switch on/off detection means for detecting whether the switch is on or off (hereinafter simply referred to as on/off detection means), and 11 is a differentiation circuit A112 that differentiates information from the on/off detection means. 13 is a switch-on detection means that determines that the switch is in the on state when the information from the differential circuit A11 is positive, and 13 similarly determines that the switch is in the off state when the information from the differential circuit A11 is negative polarity. This is a switch-off detection means.

14 (l) Start time measurement based on the information from the switch detection means 12, and turn off for a predetermined period of time (receive this information!) JL, the switch off detection means 13
ti'f ftJ stops that 1fJj production +1=
The time measuring means, 1str1 + iii, determines whether the information of the switch-on means is 11jI times, detects the number of times the switch is turned on, and at the same time detects the number of times the switch is turned on. Information is input to the switch-on number detection means (hereinafter referred to as the "on-number detection means") 16 which outputs this only when the switch is turned on an odd number of times, and to the differentiating circuit B117 which performs differentiation when the switch is turned on an even number of times. Odd number detection means 19 similarly receives information from the differentiating circuit C17, and determines that the switch has been turned on an odd number of times when information is input from the differentiating circuit B16 to the differentiating circuit C118. When the switch is turned on, the even number detection means 18 and the even number detection means 19 both input the information from the differential circuit of the RF stage ([1 The operation is determined by the tr't f4J VC from the switch-off detection means 13.

20 is 110th time measurement hair stage 14! '+'J:
River and White - By combining the information from the number of times detection ``T'' and the stage 18, the rotation direction of the rotary tip 1 is controlled to the right ``11''.
Motor clockwise rotation information synthesis means (hereinafter) that outputs information for 1
- 1111 hair is called 1 role in the middle), 21 is the above 11
．． By combining the I'r-f information of the 7 quantity measurement stage 14 and (information from the 171H failure frequency detection means 19),
Motor counterclockwise rotation information flJ synthesis hand 1-? that outputs information for controlling the rotation j direction of the same rotation r1 to the left j direction. (hereinafter referred to as throat rotation means).

229, 1j1f, A1, Rotating means 2o, 23rd column, left same rotation plate 1, i'1 signal, the electric motor
The thyristor is a thyristor that controls the direction of electricity flowing through the winding 4 and controls the excitation direction of the stator 3 to give the rotational direction of the rotor 1. That is, the right rotation means 20 and each means connected thereto constitute a gate circuit t1ζ of the thyristor 22 that controls the rotation of the motor in the right direction, and the left rotation means 21 and each hand connected thereto constitute a thyristor gate circuit. 23
It constitutes a gate circuit.

24 is the DC voltage that provides the operating voltage of the means described in jjf1)
'There is a convex top 1 in-C.

FIG. 6 is a timing chart showing the operating status of each part in FIG. The operation of the 6ff configuration will be explained with reference to FIG.

When the C switch is turned on, the on/off (lj detection means 10 detects that the switch is turned on and outputs information to the l component 11'1 path A11. By differentiating this signal, A11 outputs positive pulse information only for the amount of time the switch is turned on. Since this information (is 1i9λ), the switch
Tri information is sent to the pen detection means 12, but not to the switch-off detection means 13 (notifies that the diode inch is turned on. Time measurement means 14tr)
i Input this information and output the information after a certain period of time. −
The force and on-number detection means measures the number of times the switch switch is turned on, judges whether it is an even number of times 1-1, and if it is an even number of times 1-1, the differential circuit B16 ( In the case of an even number of times 11, information is output to the one-stroke circuit 017.

This time, since it is the first l-;i mountain, the information is output to the refinement cycle b'8B16. This information/htJ several times failure detection means 1
8, is combined with the output information of the time measuring means 14 by the clockwise rotation means 20, and outputted to the thyristor 22. By the way, 1) As in IJ, the time 7Illl determining means 14
does not output information until a certain period of time has elapsed since the switch was turned on. The number of times detecting means 18 outputs information and μ at the same time as the switch is turned on. Therefore, only the thyristor 22 operates within a certain period of time after being switched on. Therefore, within this time, 1('f.

, Since current only flows in one direction in the r7q child winding 4,
The stator 3 is partially excited and a magnetic force acts in one direction between it and the rotor 1, and the rotor 1 begins to rotate in that direction. After a certain period of time has elapsed, the time measurement means 14 outputs information, so the counterclockwise rotation means 21 sends the information to the thyristor 23, so that current flows in the armature winding 4 in both directions. Then stator 3 has alternating KN poles,
Excited to the S pole, the rotor 1 begins to rotate at increased speed in the direction in which it is rotating.

When the switch is turned off in this state, the switch-off detecting means 13 receives this information and outputs reset information to the time measuring means 14, the number of cycles detecting means 1 day, and the even number detecting means 19. As a result, the thyristors 22, 24
3 stop operating, so the excitation of the stator 3 is stopped and the rotor 1 is stopped 1-.

Next, when the switch is turned on, the on/off detection means 1
0, the differentiating circuit A11, the switch-on detection means 12, the switch-off detection means 13, and the time measurement means 14 perform the same operations as before. The ON number detection means 15 is i-J this time.
: Since this is the second time, the information is output only to the differentiation circuit C17, and the information output to the differentiation circuit 14B16 is reset. The information sent to the even number detection means 19 is combined with the information from the time measurement means 14 by the counterclockwise rotation means 21, and the thyristor 23! Create IiJ. Thyristor 23 is connected in the opposite direction to thyristor 22, so the electric machine r-
A current flows through the winding 4, and the 3rd piece of the stator is excited.

Therefore, the rotor 1 starts rotating in the opposite direction to the curve.

After a certain period of time has elapsed, the thyristor 22 also operates, so current flows through the armature winding 4 in both directions.

In other words, within a certain period of time after the switch is turned on, only one of the thyristors 22 and 23 is operated to produce the same rotation r-1.
Determine the direction of 11V1 (the condition of the first rotation of the motor)
After a certain period of time has elapsed, both thyristors 22 and 23 operate, giving momentum to the rotation of the motor (state of steady rotation of the motor).

In the same way, every time you turn on the switch, the motor
The thyristors that are turned on during one rotation alternate, and the motor rotates left and right at h degrees.

In addition, in this embodiment, when the switch is turned on or the cylinder is turned on several times, i
The l'i' stone rotation is a left rotation in the case of an even number of rotations, but by connecting the thyristors 22 and 23 in reverse, the relationship can be reversed.

Furthermore, when the light comes, the logical sum of the time measuring means 14 and the right rotor stage 20 or the left rotating means 21 is used as the gate power information of the thyristors 22 and 23. good.

Effects of the invention 1] From the explanation of the embodiments in IJ] The light comes like a rag-
According to J-, permanent magnet rotor, N times IV'l electric 0Ja
It is not a scale that can easily control the rotation direction at the time of starting without damaging the special characteristics of the motor, but the starting rotation is a problem with this electric motor.
It has the excellent advantage of being able to solve the problem of -.

Furthermore, since the direction of rotation is reversed each time the switch is turned on, for example, when squeezing an orange, repeating on and off operations and reversing the direction of squeezing can reduce the failure rate by -1 and -. .

[Brief explanation of drawings]

Figure 1 is a configuration diagram of a conventional permanent magnet rotor type synchronous motor.
Figure 2 is an enlarged cross-sectional view of the same essential parts, Figure 3 is a diagram of the magnetic positional relationship of the rotor to the stator, Figure 4 is a diagram of the magnetic relationship of the stator to the rotor, and Figure 6 is a diagram of the magnetic relationship between the rotor and the rotor. FIG. 6, which is a block diagram of one embodiment, is a timing chart showing the operation of each part in FIG. 1... Permanent magnet rotor, 3... Stator core, 4... Armature winding, 10... Switch on/off detection means, 11...・Differential circuit A11
2...Switch-on detection means, 13...
Switch-on detection means, 14... Time-opening measuring means, 16... Switch-on number detection means, 16.
... Differential circuit B117 ... Differential circuit C11
8... i5 number number detection means, 19... even number number detection means, 20... motor right rotation information synthesis means, 21... motor left rotation information synthesis means, 22
, 23...thyristor, 24...value current voltage generating means. Name of agent: Patent attorney Toshio Nakao and 1 other person D
(. Fig. 3 ((1+ (b) Fig. 4 ra+, (eel t 7

Claims (4)

[Claims] (1) Equipped with a stator having magnetic poles, an armature winding that excites this stator, and a rotor that is rotatably supported by the sales department (111) and has permanent magnet poles. , [][I
It is made up of a plurality of thyristors that control the direction of current flowing through the armature winding, and a switch-on frequency detection means that operates as a gate circuit for these thyristors and changes the thyristor each time the switch is turned on. Permanent magnet rotation rJ-II'j times N] characterized in that the direction of rotation of the rotor is reversed at l1IJ (Iku. (2) The gate circuit of the thyristor applies current to the armature winding in both directions during steady rotation, but controls the current to flow in one direction during cut-off rotation within a certain period of time immediately after the switch is turned on. A permanent magnet rotor type synchronous motor according to claim 1, wherein the permanent magnet rotor type synchronous motor has a function of controlling the rotation direction tIf when the switch is turned on. (3) The gate circuit of the thyristor uses the information of the time measuring means and the information of the switch-on number detecting means as control information for the current flowing through the armature winding.
1<rJ electric motor between permanent magnet rotor types as described in Section 1. (4) By using a frequency dividing circuit as the switch-on number detection means, the number of on times & is detected with one switch. Opening fJJJ machine.