JPS593110B2 - 1. Hand-outed hand-painting. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention solves the drawbacks of an efficient and economical semiconductor motor (for example, the technique described in Japanese Patent Publication No. 46-36416) using one sensing element (position detection element). The present invention relates to a new technique for removing .

The drawback of the above-mentioned semiconductor electric motor is that reverse torque temporarily enters during startup or operation, making startup difficult or generating noise.

The present invention has succeeded in eliminating such drawbacks.

(2) In general, a semiconductor motor having a three-phase armature coil requires one position sensing element and its amplification circuit for each phase.

Therefore, it becomes expensive and loses its practicality.

In addition, since the armature coil is energized by the width of the field magnetic pole, a large armature current flows in the areas where the magnetic field is small at both ends, and since the output torque in that area is small, only copper loss occurs, making it extremely effective. has deteriorated.

Generally, the efficiency is 1/2 or less compared to a DC machine with lap winding or wave winding.

This drawback is exacerbated especially when it comes to high-output semiconductor motors.

In addition, reverse torque is generated due to the influence of inductance, causing noise and deterioration of efficiency.

The technique disclosed in Japanese Patent Publication No. 46-36416 is characterized in that the above-mentioned drawbacks are eliminated.

However, even with such energization, temporary reverse torque is generated during startup or operation, making startup difficult and causing noise generation.

Among these drawbacks, the difficulty of starting is a fatal drawback as an electric motor, and the current situation is that it has lost its practicality.

The device of the present invention is characterized in that it has succeeded in eliminating the above-mentioned drawbacks.

Next, with respect to FIG. 1 and subsequent figures, details of the above-mentioned one feature will be explained.

In Fig. 1, a magnetic core 1 made of laminated silicon steel plates is provided with slots 1-1, 1-2, . . . , 1-12, and armature coils are installed in the slots. It is installed as shown in the figure.

That is, armature coil C is connected to slots 1-1, 1-4, 1-7.
, 1-10 in a zigzag manner, the armature coil A,
B is slot 1-3, 1-6゜1-9, 1-1 respectively
2 and slots 1-5, 1-8, 1-11, 1-2 by similar means.

The rotating shaft 4 is supported by a bearing 5 fixed to a bracket, and the rotor 3 is fixed to the rotating shaft 4.

Ferrite magnets l-2-1, 2 are placed on the outer periphery of the rotor 3.
-2, . . . are attached to form a field rotor.

The magnetic poles N and S are alternately provided at an opening angle of 90 degrees.

This developed view is shown as the magnet rotor 2 in FIG.

In this embodiment, an internal rotor type motor in which the field is a rotor is shown, but the present invention can also be applied to a cup-shaped electric motor or a disk-type electric motor when the armature is a rotor. It is something.

In such a case, it is necessary to input the output of an externally provided current-carrying circuit to the armature coil via a slip ring.

Next, in the developed view of Fig. 2, one end of the armature coils AB and C is connected to the power supply positive pole 6-1 as a common terminal, and the other independent terminal is connected to the power supply negative pole 6-2 via the energization sterilization circuit T. It is connected.

In addition, the rotating shaft 4 of the electric motor is provided with a preemptive belt 8 (
8-1, 8-2, . . . , 8-6), each having an opening angle of approximately 60 degrees (2/3 of the width of the field magnetic pole).

Preemptive (goods) zone 8-1. 8-4 is the shading part, principal interest (goods) zone 8
-2.8-5 is semi-transparent part, preemptive zone 8-3, 8-6
is a transparent part.

The photoelectric elements 11 and 12 receive the light transmitted through each preemptive band at an opening angle of 90 degrees (same as the width of the field magnetic pole).

In this embodiment, when the magnet rotor 2 rotates in the direction indicated by the arrow, the preemptive leg belt 8 also rotates in the direction indicated by the arrow E, or the magnetic belt 10, which will be described later, also rotates in synchronization with the direction indicated by the arrow F.

However, there are cases where the phototransistor 12, which is a sensing element, is rotated and the preemptive leg band 8 is fixed.

For example, in a cup motor or a disk motor with a rotating armature, the Hall element 12 is rotated together with the armature to obtain a position detection signal, and the current-carrying side (goods) of the armature coil is This is the case when doing this.

Power is supplied to the energization sterilization circuit via a slip ring.

Next, the phototransistor 11 in Fig. 2 is 90 from 12.
Since they are separated by a degree (width of the field magnetic pole), when the output of the phototransistor 11 is switched, the motor reverses.

The magnetic side band 10 has N and S poles (10-1, 10-4 and 11-3, 10-6 parts) with an opening angle of about 60 degrees, and a non-signal part 10-2 with no magnetic pole. It is divided into .1()-5.

A Hall element 14 serving as a position detection element is located on the magnetic side band 1.
It is facing 0.

The actual structure of the above-mentioned system is shown in Figure 1.

In FIG. 1, the same symbols as in FIG. 2 are the same members.

In figure a, a mylar film disc 34 fixed to the rotating shaft 4
Preemptive bands 8-1, 8-2, etc. are provided around the outer periphery of the preemptive bands 8-1, 8-2, etc., and the projected light of light emitting diodes (not shown) is directed to each preemptive band.
The phototransistor 12 receives light through the band.

In Figure b, a ferrite magnet is attached to a rotor 35 fixed to the rotating shaft 4, and is divided into N and S pole portions and a non-magnetized portion.

Symbol 36 is a mild steel ring that serves as a magnetic path.

A Hall IC can also be used instead of the Hall element 14.

A Hall IC is a silicon-based IC whose Hall voltage is amplified by one silicon transistor to output an output.

Since it has a large output and a small temperature coefficient, it can be used in large output motors.

When each side band 8, 10 rotates in the direction of the arrow, three different electric signals can be sequentially obtained from the phototransistor 12 or the Hall element 14.

As a preemptive leg belt, reflected light can also be used instead of transmitted light.

Next, the details of the current-carrying circuit (indicated by symbol γ in FIG. 2) will be explained with reference to FIG. 3a.

Transistors 15.16 are installed in armature coils A, B, and C.
, 17 are connected in series.

When the phototransistor 12 faces the preemptive band 8-1, there is no photocurrent, and the base current of the transistor 15 is obtained through the resistor 15a, making it conductive.

Armature coil A is therefore energized. At this time, the base voltage of the transistor 160 drops through the diode 24 and is kept non-conductive.

The motor rotates 60 degrees, and phototransistor 1
2 faces the party interest band 8-2, the photocurrent becomes an intermediate value, and the transistor 20 becomes conductive.

Therefore, the transistor 19 is temporarily turned on via the resistor 20a and the capacitor 23.

Therefore, since the transistor 18 becomes non-conductive, the armature coil continues to be energized.

However, in reality, energization is transferred to armature coil B for the following reasons.

When the photocurrent reaches an intermediate value, the base voltage of the transistor 18 increases through the resistor 12a and becomes conductive, so that the transistor 15 also becomes non-conductive.

Therefore, the base voltage of transistor 16 is
The armature coil B is energized because the current rises through the terminal and becomes conductive.

When the electric motor further rotates by 60 degrees, the phototransistor 12 faces the preemptive leg band 8-3.

When the photocurrent reaches its maximum value, the transistor 21 becomes conductive, and the base voltage of the transistor 20 rises through the diode 22 to become non-conductive.

Therefore, the transistor 11 becomes conductive via the resistor 21a, and the armature coil C is energized.

Therefore, the base voltage of the transistor 16 drops through the diode 25 and is kept non-conductive.

Thus, the energized armature coil is A-) B→C→
As shown in FIG. 2, the magnetic rotor 2 rotates in the direction of the arrow due to Fleming's force, forming a semiconductor motor.

The above-mentioned energized state is shown in FIG.

The horizontal axis is the magnet rotor 20 rotation angle θ.

Curves 47-1.47-2.47-3 are the back emfs of armature coils A, B, and C, respectively.

A general semiconductor motor is energized only by the width of the field magnetic pole, that is, between dotted lines 48 and 49, by the output of the position sensing element.

Therefore, if armature coil B is taken as an example, the curve will be as shown in curve 52.

Since the magnetic field is small at both ends, a peak value occurs.

At this point, since the torque is small, there is only copper loss, which significantly degrades efficiency, resulting in a drop in efficiency of lap-wound and wave-wound motors.
/2 or less.

Also, due to the influence of the inductance of the armature coil, the diagonal line 52
Since the 8th part penetrates into the next magnetic field, it has the disadvantage of generating reverse torque, deteriorating efficiency, and generating noise.

In the device of the present invention, the field magnetic pole is 2/3 during energization, so a curve 53 appears only between dotted lines 50 and 51.

Therefore, the peak values at both ends and the shaded portion 52a disappear.

The same situation applies to the other armature coils A and C.

Therefore, a semiconductor motor is obtained in which the magnet rotor 2 rotates in the direction of the arrow in FIG.

Furthermore, the above-mentioned drawbacks are eliminated, and a semiconductor motor with good efficiency and low vibration can be obtained.

Furthermore, even if the energization curve 53 moves slightly from side to side, it will not significantly affect the output torque or efficiency, so the angular phase between the phototransistor 12 of the position detection device, the preemptive belt 8, and the armature coil can be accurately adjusted. No need to match.

Therefore, it is effective in mass production.

Accidental light at startup] Transistor school 12 is under optical control □
□ At the boundary between the bands 8-1 and 8-6, a signal intermediate between light-shielding and light-transmitting, that is, a signal exactly the same as the photocurrent due to the semi-transparent portion 8-2 is obtained.

According to common-sense energization means in the case of a three-phase armature coil, the energization will be as described below.

In other words, the phototransistor 12
-2.8-3, the armature coils A, B, and C are energized, respectively.

According to this energizing means, as described above, the preemptive belt 8-2, which is a semi-transparent part, is formed between the party interest belts 8-1 and 8-6.
Or the same signal as when facing 8-5 will come out, so
Armature coil B is temporarily energized.

Reverse torque occurs due to this energization.

Therefore, the motor rotates in reverse, and the phototransistor faces the preemptive belts 8-6, so that the rotation is again converted to normal rotation.

This is because the torque changes to reverse torque again between the party interest zones 8-1 and 8-6.

The disadvantage is that it is difficult to start up due to repeated forward and reverse rotations.

It is also an extremely sad moment while driving, but party interests (wealth)
Since a reverse torque is generated when passing through the boundaries of bands 8-1, 8-6 and 8-3, 8-4, there is a drawback that noise is generated.

The device of the present invention has the effect of eliminating such drawbacks.

Phototransistor 12 is in party interest zone 8-1 and 8-
6 at the time of startup, the photocurrent becomes an intermediate value, so that the transistor 19 temporarily becomes conductive via the capacitor 23, as described above.

Therefore, transistor 18 becomes non-conductive and transistor 15 becomes conductive.

Therefore, armature coil A is energized, generating positive torque and starting.

As soon as the motor rotates, the phototransistor 12 faces the main/return leg band 8-1, so the photocurrent disappears, the armature coil A is officially energized, and the rotation continues.

Even while driving, the preemptive double belt from 8-6 to 8-1 or 8
The same phenomenon occurs when shifting from -3 to 8-4, but the temporary occurrence of reverse torque is prevented due to the same circumstances.

As can be seen from the above description, the device of the present invention is highly efficient and economical, is suitable for mass production, and has the characteristics of a semiconductor motor that does not generate reverse torque and can start completely. be.

Also in this embodiment, if the capacitor 23 is not present.

At the boundary between the party-interest zones 8-1 and 8-6, the voltage drop across the resistor 12a causes the transistor 18 to temporarily become conductive and the transistor 15 to become non-conductive.

Therefore, armature coil B is temporarily energized and reverse torque is generated, making it difficult to start.

However, the capacitor 23 eliminates this drawback.

Next, the current-carrying side circuit shown in Figure 3 will be explained.

Components with the same symbols as those in Figure a are the same members, so their explanations will be omitted.

The phototransistor 12 is a light control band 8-1°8
-2, 8-3,..., the armature coil is cyclically energized in the order of A-)B-)C→... to generate driving torque. This is the same as in Figure a.

If the phototransistor 12 happens to be on the boundary with the principal and profit zone 8-1.8-6 at the time of startup, the photocurrent will be at an intermediate value and the transistor 20 will be conductive, so that the resistor 20a and A base current is input to the transistor 19 via the capacitor 23a, and the transistor 19 is temporarily turned on.

Therefore, the transistor 18 becomes non-conductive and the transistor 15 becomes conductive, so that a positive torque is generated to start the motor.

As soon as the phototransistor 12 is activated, the principal and interest (
Since it faces band 8-1, armature coil A is energized and subsequent rotation takes place.

Therefore, the startup is complete. Furthermore, if the phototransistor 12 is opposed to the belt 8-2 at the time of startup, the transistor 20 becomes conductive, the transistor 19 becomes conductive temporarily through the resistor 20a, and the armature coil A is turned on. Turn on electricity.

Therefore, reverse torque is generated, but soon transistor 1
Since transistor 8 becomes conductive and transistor 15 becomes non-conductive,
The base voltage of the transistor 16 rises and becomes conductive, and the armature coil B is energized to generate positive torque and start up.

Also, when passing through the boundary between preemptive bands 8-1 and 8-6 during operation, the armature coil A is
is energized, the photocurrent disappears, and the transistor 1
Since both 9 and 18 become non-conductive, armature coil A is subsequently energized and operated with constant positive torque.

Also, in the process of the phototransistor 12 entering the property band 8-2 from the property band 8-1, when the phototransistor 12 enters the property band 8-2, first the transistor 19 becomes conductive via the capacitor 23a, so the time constant only the time corresponding to
Armature coil A is energized and armature coil B is not energized.

Therefore, it is desirable that the time constant of the capacitor 23a be as small as possible within the range in which starting is performed completely.

The situation is exactly the same for the capacitor 23 in Figure a.

For the reasons mentioned above, the principal and interest (wealth) band 8-1゜8-4 is 6
It is preferable that the angle is slightly smaller than 0 degrees, and that the light control band 8-2, 8-5 is slightly longer.

Next, in the embodiment shown in FIG. 4, the transistor 19 of the embodiment shown in FIG. 3 is omitted, and a capacitor 23b is provided in the base circuit of the transistor 18.
It is exactly the same as the case shown in the figure.

When the photocurrent reaches an intermediate value, the capacitor! The transistor 15 conducts for a time corresponding to the time constant of -23b,
This is because armature coil A is energized, and then armature coil B is energized.

Next, the embodiment shown in FIG. 5 is a case where the Hall element 14 is placed above the position sensing element.

When the Hall element 14 faces the N pole 10-1 in FIG. 2, the transinter 26 becomes conductive, the voltage drop across the resistor 26a causes the transistor 15 to conduct, and the armature coil A is energized.

Further, the base voltage of the transistor 16 drops through the diode 2B and is kept non-conductive.

Next, when the motor rotates 60 degrees, the Hall element 14 faces the no-signal section 10-2, and the output disappears, so that both the transistors 15.1[gamma] become non-conductive.

Therefore, the transistor 16 becomes conductive through the resistor 16a, and the armature coil B is energized.

When the motor further rotates by 60 degrees, the Hall element 14 faces the S pole 10-3, so the transistor 21 becomes conductive, and the transistor 11 is made conductive via the resistor 2γa, so that the armature coil C is energized.

At the same time, the transistor 16 is made non-conductive via the diode 29.

Fleming's force acts on the above-described current-carrying side, and the magnet rotor 2 in FIG. 2 becomes a semiconductor motor rotating in the direction of the arrow.

The effects of this configuration are exactly the same as those of the previous embodiment.

However, at the time of startup, the Hall element accidentally
1 and S pole 10-6, there is no output, so armature coil B is energized and reverse torque is generated.

When reversed and the Hall element 14 faces the S pole 10-6,
Armature coil C is energized and a positive torque is generated.

Turning forward, the Hall element 14 has a north pole 10-1 and a south pole 10-6.
When it reaches the boundary, the torque becomes reverse again.

As a result, it becomes a vibrating type and becomes difficult to start.

Also, during operation, the Hall element 14 connects the N pole 10-1 and the S pole 10-
When passing the boundary with 6, a reverse torque is temporarily generated, causing vibration.

A transistor 32 and a capacitor 33 are used to eliminate this phenomenon.

At startup, if the Hall element 14 happens to be on the boundary between the N pole 10-1 and the S pole 10-6, there is no output, so the base current of the transistor 32 passing through the diodes 30 and 31 disappears.

Therefore, the base current of the transistor 15 is obtained through the capacitor 33, and conducts for a time corresponding to the time constant, so that the armature coil A is temporarily energized.

Therefore, positive torque is generated to start the motor. As soon as it is activated, the Hall element 14 faces the north pole 10-1, so that subsequent rotation takes place.

A monostable circuit may be used instead of the capacitor 33 to energize the transistor 15 for a predetermined period of time.

When the motor is rotating in the opposite direction, it will start in the same way, but in this case it is better to input the output pulse through the capacitor 33 to the base of the transistor 11.

Furthermore, if the Hall element 14 is opposed to the no-signal section 10-2 at startup, the transistor 1 is connected via the capacitor 33.
5 becomes conductive, armature coil A is temporarily energized and a reverse torque is generated, but it quickly disappears and there is no problem with starting.

Further, during operation, when the Hall element 14 moves from the N pole 10-1 to the non-signal part 10-2, the Hall output disappears, so the transistor 32 becomes non-conductive at the same time as the transistor 15 becomes non-conductive. , temporarily makes the transistor 15 conductive via the capacitor 33.

After the conduction ends, the armature coil B is energized.

Therefore, make the width of N pole 1 (11, 10-4 narrower),
It is preferable to make the non-signal areas 10-2 and 10-5 large.

When it is preferable to avoid changing the width of the restraining belt as described above, for example when changing the rotational speed from low speed to high speed, the following method is adopted.

That is, as shown in FIG. 5, a transistor 32a is added.

The case at startup is exactly the same as when the transistor 32a is not added.

During operation, the Hall element 14 is connected to the no-signal section 1 from the N pole 10-1.
When transitioning to 0-2, when the Hall element 14 is under the N pole 10-1, the transistor 15 becomes conductive due to the voltage drop across the resistor 26a, and the armature coil A is energized, but at the same time, the transistor 32a also becomes conductive. Because it makes it conductive.

Transistor 32 becomes non-conductive.

Therefore, the capacitor 33 remains charged.

When the Hall element 14 faces the no-signal 10-2, the resistance 2
Since the voltage drop across 6a disappears, the transistor 15 becomes non-conductive and the transistor 16 becomes conductive, so that the armature coil B is energized instantly without being affected by the capacitor 33.

Therefore, the armature coils A and B are energized in accordance with the widths of the restraining bands 10-1 and 10-2.

In such a case, the diode 30 becomes unnecessary.

Furthermore, since the time constant of the capacitor 33 may be increased, the start-up is characterized as being complete.

In the case of a high-output electric motor, many slots can be provided, so one position sensing element can operate the current-carrying legs of three sets of three-phase coils A, B, and C, and one or two sets of The same purpose can be achieved by providing devices with the same configuration.

Next, the energization sterilization circuit shown in FIG. 8 uses the phototransistor 12 as a position detection element, but the control circuit
It has a simplified circuit and is used in small semiconductor motors.

Phototransistor 12 is preemptive (goods) band 11.8-2
．． The armature coils A, B, and C are sequentially and cyclically energized as they face the coil 8-3, which is the same as in the previous embodiment, and the effect is also the same.

When the phototransistor 12 faces the party interest band 8-1 and the photocurrent is at its lowest value, the transistor 40 is non-conductive, so the transistor 15 is conductive and the armature coil A is energized, and the diode The transistor 16 is held non-conductive through the transistor 24. The motor rotates in the 0th order, and the phototransistor 12 is turned off.
When facing the band 8-2, the photocurrent becomes an intermediate value, so the transistor 40 becomes conductive, so the transistor 15 becomes non-conductive, cutting off the current to the armature coil A, and at the same time, the transistor 16 becomes conductive, causing the electric machine to Child coil B is energized.

When the motor further rotates and the phototransistor 12 faces the preemptive leg band 8-3, the photocurrent reaches its maximum value, the transistor 11 becomes conductive via the resistor 12b, and the armature coil C is energized.

Therefore, the transistor 16 is kept non-conductive via the diode 25, and the transistor 40 remains conductive, so that the current to the armature coil A is also cut off.

During startup, the phototransistor 12 accidentally jumps to the control band 8-.
At the boundary between 1 and 8-6, the photocurrent has an intermediate value, but the conduction of the transistor 40 is delayed for a time corresponding to the time constant of the capacitor 41.

Therefore, transistor 15 becomes conductive and armature coil A
is energized and positive torque is generated.

Therefore, the photocurrent in the phototransistor 12 immediately disappears as it faces the band 8-1, so that the transistor 15 remains conductive and is activated.

Also, at startup, the phototransistor 12 activates the preemptive leg band 10-.
2, the photocurrent has an intermediate value, but the capacitor 41 first conducts the transistor 15, and the armature coil A conducts current, generating a reverse torque, but as the capacitor 41 charges, the When the torque disappears, armature coil B is energized, converting to positive torque and starting.

During operation, the reverse torque disappears when shifting from light control wholesale 8-6 to 8-1, and the width of party-profitable band 8-1 is narrowed, and the width of party-specific (corporate) band 8-2 is reduced. It is completely the same as the previous embodiment that by slightly widening the current-carrying state, the current-carrying time can be made almost equal, so a description thereof will be omitted.

As can be seen from the above description, the effects of this embodiment are similar to those of the previous embodiment.

The same effect can be obtained even if the capacitor 41 is omitted and a capacitor 41a is provided.

That is, at startup, the phototransistor 12 activates the preemptive leg belt 8-.
At the boundary between 1 and 8-6, the photocurrent becomes an intermediate value, but the base current of the transistor 17 flows through the capacitor 41a and conducts, so the armature coil C is energized and a positive torque is generated. and start it.

At this time, since electrons are falling in the collector of the transistor 40, the transistor 15 is non-conductive.

As the capacitor 41a is charged, the transistor 11 becomes non-conductive.

However, during this time, the phototransistor 12 faces the light control wholesaler 8-1, so the photocurrent disappears, the transistor 15 becomes conductive, and the armature coil A is energized to perform the subsequent rotation.

Also, at startup, there are 12 phototransistors or 8 party-specific (founded) bands.
-2, 1 through the capacitor 41a.
Transistor 11 becomes conductive and armature coil C is energized, creating a reverse torque, but it quickly disappears, transistor 40 becomes conductive, and transistor 15 becomes non-conductive, so armature coil B becomes energized. Then, the motor becomes positive torque and starts.

Also, during operation, the phototransistor 12
When passing through 8-1, the photocurrent reaches an intermediate value at that boundary, but it is irrelevant because the transistor 40 is already conductive, and the photocurrent disappears when it faces 8-1. Therefore, the transistors 40 and 1γ become non-conductive, and the transistor 15 becomes conductive, so that the armature coil A is energized.

At this time, the transistor 17 is temporarily turned on via the capacitor 41a, but this is not a problem since the effect is the same as that of slightly widening the light control n-band 8-6.

Also, during operation, the phototransistor 12
When passing through 8-2, the photocurrent converts to an intermediate value.

Therefore, transistor 40 becomes conductive, transistor 15 becomes non-conductive, and armature coil B is energized.

At this time, for diode 41b, capacitor 4
Since the charged discharge of 1a is tolerated, transistor 4
0 becomes conductive instantly.

Therefore, the effect is that the transistor 15 is also rendered non-conductive without any time delay.

Next, the embodiment shown in FIG. 9 has almost the same configuration as that in FIG. 8, but the transistor 40 in FIG. 8 is removed and the transistor 43 is inserted.

When the photocurrent is at its maximum value, transistor 17 is conductive and armature coil C is energized; Ru.

When the photocurrent reaches an intermediate value, only transistor 43 is energized, transistors 15 and 17 are non-conductive, transistor 16 is conductive, and armature coil B is energized.

Since the energization sterilization described above is exactly the same as in the previous embodiment, its action and effect are also the same.

Furthermore, if the phototransistor 12 happens to be at the boundary between the preemption zones 8-1 and 8-6 at the time of startup, the photocurrent will be at an intermediate value, so that the transistor 43 will be energized at 1 o'clock via the capacitor 42a. is suppressed.

Therefore, the transistor 15 temporarily becomes conductive, and the armature coil A is energized to generate positive torque and start up.

Immediately the phototransistor 12 is preemptive (goods) zone 8-1
Since the armature coil A is energized, the armature coil A is energized and continues to rotate.

In other cases, that is, when the phototransistor 12 faces the preemptive strips 8-2 at the time of startup, the preemptive strips 8-2 face the preemptive strips 8-2 during operation.
If it passes from 6 to 8-1, it is also preemptive (goods) zone 8-
The effects regarding the transition from 1 to 8-2 are also shown in the 8th section.
This is almost the same as the embodiment shown in the figure.

If phototransistor 11 is used in place of phototransistor 12 as shown in FIG. 2, the motor will reverse.

In this case, the capacitor 42 is
a is removed and a capacitor 42 is provided.

The effect at startup is exactly the same as in the case of the capacitor 42a.

However, the effect while driving is different. During operation, when the phototransistor 11 passes from the gate 8-3 to the gate 8-2, the photocurrent becomes an intermediate value, so the transistor 17 is temporarily turned on via the capacitor 42.

Therefore, the armature coil C is energized, but since this is a positive torque, there is no problem because the effect is the same as if the preemptive belt 8-3 were made slightly wider.

If the capacitor 42a is used at this time, the armature coil A will be energized, resulting in the disadvantage that reverse torque will be mixed in.

In the case of rotation where uneven rotation is not a problem, either capacitor 42 or 42a may be used.If you want to perform forward and reverse rotation with the same characteristics, connect the capacitors 42 and 42a by switching when switching between forward and reverse rotation. Is it necessary?

As can be seen from the description of each embodiment above, according to the present invention, the objects stated at the beginning are achieved and the effects are significant.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of the mechanism of the device of the present invention, Fig. 2 is an exploded view of the magnet rotor and armature coil, and Figs. 3, 4, and 5 are circuits of each embodiment of the energization control wholesale circuit. Figure 6 is a graph of the energization curve, Figure 7 is an explanatory diagram of the position detection device, and Figure 8 is a graph of the current conduction curve.
9 and 9 show circuit diagrams of each embodiment of the energizing sterilization circuit. 1...Thrower N-1, 1-2,...
Armature core provided with 1-12, 2...Magnetic pole 2-
1, 2-2,..., 2-4 magnet rotor (field rotor), 5... bearing, 4...
...Rotating shaft, A, B, C... Armature coil,
1... Energization control wholesale circuit, 6-1゜6-2...
...DC power supply voltage negative pole, 8, 8-1, 8-2. ......, 8-6... Preemptive (goods) belt, 10
,10-1゜10-2,...,10-6...
...Magnetic belt, 11゜12...Phototransistor, 14...Hall element, 15,
16,1γ, 18,19,20°21 = Transistor, 23,23at23bt33.41,42,4
2a... Capacitor, 26.2γ, 32,3
2a...Transistor, θ...Rotation angle of magnet rotor, 4γ-1°47-2, 47-3
・・・・・・Back electromotive force curve, 52°52a, 53...
...Conduction curve, 40,43...Transistor.

Claims (1)

[Claims] 1 A three-phase armature coil attached to an armature and three stages of first coils having different physical characteristics sequentially at an opening angle of approximately 2/3 of the width of the field magnetic pole. Second. A system belt consisting of 3 parts,
One sensing element provided opposite to the control band is rotated relative to the control band and the sensing element in synchronization with the rotation of the electric motor, and a cyclic signal is transmitted through the sensing element. Three stages of different position detection signals are obtained, and at the boundary point where the third control band transitions to the first control band, the same signal as the position detection signal from the second control band is generated. A semiconductor switching element connected in series to the armature coil is energized via a position sensing device and a position sensing signal obtained by the device, and the first. In a semiconductor motor whose rotor is an armature or a field consisting of a current-carrying circuit that cyclically energizes the armature coils of each phase corresponding to the second and third control bands, The sensing element is the first. The position detection signal at the boundary of the third control band suppresses the energization of the armature coil that should be energized by the second control band, and the electric machine that should be energized via the third control band. The child coil is at least the first coil described above. 1. A semiconductor motor in which a secondary leg is energized by one position sensing element, characterized in that the motor comprises an energizing circuit that energizes until the sensing element finishes passing through a third boundary.