JPS60204288A - Dc commutatorless motor - Google Patents

Abstract

PURPOSE:To perform smooth start and rotation of a rotor while using only a position detector by supplying a position detection signal distributed to a signal line in response to the rotating position of the rotor to a sequence circuit. CONSTITUTION:A position detection signal which varies at three levels depending upon the rotating position of a motor is output to a position detection terminal P, the signal is distributed by a distributor 100 to three signal lines 100n, 100s, 100z, a conditioning is further performed by a sequence circuit 200, and fed to a drive signal generator 300. The generator 300 produces 3-phase winding drive signals on the basis of a rotary position detection signal supplied from the circuit 200, a sawtooh wave and a delay pulse supplied from a slope generator 500 and applies them to a drive circuit 700.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a relatively small-capacity non-commutator motor used as a DC power source, and is particularly applicable to recording and reproducing devices such as video table recorders and air-cooling fan motors. The present invention provides a DC commutatorless motor suitable for use in this manner.

Conventional configurations and their problems In recent years, DC non-commutated motors have come into widespread use in many audio equipment, video recorders, and even floppy disk drives. Even the motor uses a DC non-commutator motor.

Conventionally, two-phase or three-phase half-wave drive systems or aftereffect drive systems have been the mainstream for this type of DC non-commutator motors.

Each drive system has its own advantages and disadvantages; for example, the three-phase drive force type requires fewer power elements for driving than the two-phase drive force type. A large number are required.

By the way, if you compare the two-phase full-wave drive type with a single power supply, eight power transistors and two Hall elements are required, and the three-phase full-wave drive type requires six. A power transistor and three Hall elements are required.

In the past, many attempts have been made to reduce the number of position detection elements in three-phase driving force systems, and a representative technique is disclosed in U.S. Patent No. 3,577.053 (hereinafter referred to as
Literature 1. ! l: Name. ) is disclosed.

The above-mentioned document 1 describes that in a three-phase half-wave drive type non-commutator motor, first, second, and third lights having different light reflectances are mounted on the rotor.
By irradiating the identification band with a light beam and detecting the reflected light with a light receiving element, a change in the rotational position of the rotor can be detected as a three-step change in the output level of the light receiving element. A device is shown that is arranged to energize the phase windings depending on the level of the phase winding.

In addition, when the rotor starts up, the light beam is incidentally irradiated onto the boundary between the first component and the third component, and the output level of the light receiving element takes an intermediate value, so it seems as if the second configuration The detection circuit operates as if it had detected the element part,
It is explained that in order to prevent the occurrence of reverse torque and vibration of the rotor, it is sufficient to configure the output level determination circuit section of the light receiving element with a Schmitt circuit.

The same letter is Patent Application Publication No. 463, 1982.
No. 17 (hereinafter referred to as Document 2), and in Document 2, instead of the Schmitt circuit, the third
A drive circuit device is shown that is provided with a memory circuit for storing detection of a component part of.

In both of the above-mentioned documents 11 and 2, three-phase half-wave drive is possible using a unique position detection element and an identification band for position detection, but phase @ line driving is possible without using any special position detection element. (a method has also been proposed and put into practical use (e.g. CX20114, a 3-phase commutatorless motor drive IC manufactured by Sony)). , Reference 3), the energization state of each phase winding is initially switched by the output signal of a self-propelled three-phase multivibrator, and after the rotor starts rotating, the energization state of the three-phase stator is switched. A drive circuit device is shown that is configured to switch the energization state of each phase winding using a power generation waveform appearing in an idle winding among the windings.

However, in the method shown in Document 3, since the windings of each phase are first energized indiscriminately, reverse torque may occur instantaneously or sufficient starting torque may not be obtained, causing the motor to energize. There is a disadvantage that it takes a long time for the rotation speed to reach the desired rotation speed.

By the way, the commutatorless motors shown in Documents 1 and 2 are both three-phase and half-drive types, but their drive form is limited to the three-phase and half-wave type due to structural constraints.

In other words, if we take the format shown in Document 1.2 above, 36
Since only three types of detection can be performed per 0° electrical angle,
Inevitably, only three ways of switching the energization state to each phase winding are allowed, and in order to realize a three-phase full-wave drive force type that requires switching of the energization state in six ways, additional positions are required. Requires detection element and identification band.

In addition, motors that require phase control, such as cylinder drive motors (also called drum drive motors) for video table recorders, require a detection signal for the absolute position of the rotor once or several degrees per rotation. is (generally P
It's called the G-pulse. ), which also requires extra position sensing elements and identification bands.

Furthermore, if the Schmitt circuit shown in the above-mentioned document 1 or the memory circuit shown in the above-mentioned document 2 is constructed with an analog circuit, the scale becomes large and extra parts such as capacitors are required. The trend towards miniaturization of logic elements in digital ICs (the production cost per gate is rapidly decreasing).

), it would be more rational to implement it with a digital circuit, and in that case, the Schmitt circuit and the memory circuit would end up having the same configuration, and both would use flip-flops (bistable circuits). As is well known, the initial output state of the flip-flop is indeterminate, and an important issue is how to relate that output to the output signal from the position detection element at the time of starting the motor.

However, Document 12 does not mention this problem at all.

Purpose of the Invention The present invention is to realize a DC commutatorless motor with a simplified rotor rotational position detection mechanism. This also makes it possible to obtain PG pulses once or several degrees per revolution without having to do so.

Structure of the Invention The DC non-commutator motor of the present invention includes a three-phase stator winding,
a rotor including a permanent magnet having a plurality of magnetic poles facing the stator winding; a position detection element for detecting the rotational position of the rotor; and a position detection element for detecting the rotational position of the rotor. an annular identification band having first, second, and third components that produce three output states with different levels; and a driving means for supplying current to the stator winding;
a distributor that distributes the output of the position detection element to an eleventh second and third signal line according to its level; and three signal lines that are connected to each other in a ring shape and send a drive command signal to the drive means. a sequential circuit having an output section and changing the output state of the output section only when a pre-sequenced signal line among the signal lines becomes active; It is characterized by comprising initialization means that makes the output state dependent on the output state of the distributor, and in particular, the signal line is distributed to the first to third signal lines according to the rotational position of the rotor. The present invention is characterized in that by supplying a position detection signal to the sequential circuit, it is possible to smoothly start and rotate the rotor while using only one position detection element.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a schematic diagram of a motor configured to carry out the present invention, in which three-phase stator windings 1.2.
3 are star-connected to each other, and a permanent magnet 4 mounted on a rotor (not shown) is placed opposite the stator windings 1 to 3.

The main part of the permanent magnet 4 is occupied by a main magnetic pole magnetized into eight poles, and the inner peripheral part thereof includes a first component part magnetized with an N pole (indicated by the N symbol in the figure). ) the unmagnetized second component part (indicated by the Z symbol in the figure), and the third component part which is S-pole magnetized (indicated by the S symbol in the figure). ) has annular identification bands 5 arranged alternately in the circumferential direction.

Also, a pole IC (an integrated circuit in which a Hall power generator and other circuits are co-located on a chip, generally a Hall IC
It is called C or Hall switch. ) 6 are placed.

On the other hand, a zigzag-shaped power generation winding 7 having 24 power generation element portions that is diffracted in the radial direction is disposed facing the inner circumferential side of the main magnetic pole of the permanent magnet 4. is a non-magnetized portion for generating an alternating current signal of 12 cycles per rotation of the rotor in the power generation winding 7 (even if it is not non-magnetized, it is magnetized so that the magnetic flux density suddenly decreases, Alternatively, depressions may be provided at eight locations.

Further, the lead wires of the stator winding 112.3 are respectively connected to a first power supply terminal U1, a second power supply terminal V1, and a third power supply terminal W, and the center point of the star-shaped wire connection is connected to the terminal X. There is.

The Hall ICB has a positive power supply terminal 6as, a negative power supply terminal 6b, and an output terminal 6c, and the lead wires of the power generation winding 7 are connected to output terminals 7a and 7b.

Now, FIG. 2 shows a block configuration diagram of a DC non-commutator motor in one embodiment of the present invention, and in FIG. 2, block 10 has the internal wiring of the motor block shown in FIG. This is what I did.

That is, in the motor block IO, the middle point terminal
A current limiting resistor 8 is connected between the positive power supply terminals 6a of the seven-hole ICG, and the negative power supply terminal 6b of the Hall IC 6 and one output terminal 7b of the power generation winding 7 are commonly connected to the ground terminal G. The output terminal 6c of the hole lc6 is connected to the position detection terminal P, and the other output terminal 7a of the power generation winding 7 is connected to the rotation detection terminal F.

A position detection signal whose level changes in three stages depending on the rotational position of the motor is outputted to the position detection terminal P by a processing circuit to be described later, and this position detection signal is divided into three signals by a distributor 100. Line 100n, 100s,
The condition material is further processed by the sequential circuit 200 and sent to the drive signal generation circuit 300.

On the other hand, the signals appearing at the rotation detection terminal F and the ground terminal G are amplified to a sufficient amplitude by an amplifier 400 and then supplied to a slope generation circuit 500, and are also sent to the A terminal as a speed detection signal for the rotation servo of the motor. The signals supplied and appearing on the signal lines 100n and 100s are extracted once per rotation of the motor by an extraction circuit 600, and are also supplied to the B terminal as a position detection signal for the rotation servo of the motor.

Although the present invention does not refer to the motor rotation servo system, here, the error is sent to the drive signal generation circuit 300 via the E terminal based on the speed information and position information obtained from the A terminal and B terminal. The voltage shall be returned.

Now, the slope generation circuit 500 and the power generation winding 7
A sawtooth wave and a delay pulse are generated in synchronization with the output signal of and supplied to the drive signal generation circuit 300, respectively.

Furthermore, the drive signal generation circuit 300 generates a three-phase winding drive signal based on the rotational position detection signal supplied from the sequential circuit 200 and the sawtooth wave and delay pulse supplied from the slope generation circuit 500. is generated and sent to the drive circuit 700.

The drive circuit 700 amplifies the current of the winding drive signal, and then energizes the three-phase stator windings 1 to 3 via the U terminal, the ■ terminal, and the W terminal.

Note that the J terminal is a terminal to which a command signal for stopping and rotating the motor is supplied, and this command signal is supplied to the sequential circuit 200 and the drive circuit 700, but in the embodiment, the J terminal is set to "L". The stator winding is configured to be energized when the stator winding is at the "use" level (low potential), and is energized when the stator winding is at the "use" level (high potential).

In the embodiment shown in FIG. 2, three signal lines 100n, 100s, 100
zl: The distributor 1.00 that distributes as a binary signal can be easily realized by two comparators having different threshold voltages, and the amplifier 400 is also a simple AC amplifier, so a description of its internal configuration will be omitted here. However, the operations of other circuit blocks will be briefly explained while showing examples of actual circuit configurations.

First, FIG. 3 is a circuit connection diagram showing a specific example of the configuration of the Hall LC6, which includes a constant voltage circuit section 61 using a well-known bandgap reference voltage source, etc., and a It consists of a Hall power generator 62 and other signal processing circuit parts.

The Hall power generator 62 of FIG. 3 is connected to the identification band 5 shown in FIG.
The potential of one output terminal 62a of the Hall power generator 62 rises when the Hall power generator 62 is facing the N-pole magnetized part.
The potential of the other output terminal 62b decreases.

Therefore, the collector potential of transistor 63 decreases,
Since the collector potential of the transistor 64 increases, most of the current flowing into the constant current transistor 65 becomes the collector current of the transistor 66.

In the circuit shown in FIG. 3, the resistance ratio between the resistor 67 connected to the emitter side of the constant current transistor 65 and the resistor 69 connected to the emitter side of the constant current transistor 68 is set to 3:4. Therefore, if the collector potential of the constant current transistor 65 is 4·Io, the collector current of the constant current transistor 68 is approximately 3·Io.

Further, a resistor 71 connected to the emitter side of the power receiving transistor 70 constituting the positive side current mirror circuit,
The resistance values of the resistors 74 and 75 connected to the emitter side of the constant current transistors 72 and 73 are set to be equal, and the resistance value of the resistor 77 connected to the emitter side of the constant current transistor 76 is set to be equal to the resistance of the resistor 71. Since the collector current of the constant current transistors 72 and 73 is set to 3 times the maximum value, the collector current of the constant current transistor 76 is approximately 3.1o, and the collector current of the constant current transistor 76 is approximately I'o.
becomes.

Therefore, 4 of the collector current of the transistor 66 is
3/3 is supplied from the constant current transistor 73, and only the remaining 1/4 is supplied to the 11 collector 7 of the transistor 78.
8a.

At this time, a current of Io is supplied from the second collector 78b of the transistor 78 to the load resistor 79 connected to the output terminal 6c, and a current of Io is supplied to the load resistor 79 connected to the output terminal 6c.
6 Garamo I.

Since the current is supplied, the resistance value of the resistor 79 is set to Ro
When this happens, a potential of 2.Ro appears at the output terminal 6c.

On the other hand, when the Hall power generator 62 faces the S-pole magnetized portion of the identification band 5, most of the current flowing into the constant current transistor 65 flows through the transistor 8.
(), and the first collector 81a and second collector 81b of the transistor 81 also have Io current.
A current flows through the second collector 81b, and the current is supplied to a current mirror circuit constituted by a transistor 82 and a transistor 83.

Therefore, at this time, the constant current transistor 76
Most or all of the collector current flows into the collector of the transistor 83, and the potential of the output terminal 6c becomes zero.

On the other hand, when the pole generator 62 faces the non-magnetized portion of the identification band 5, the transistor 66.80
Since the collector currents of the transistors 66 and 80 are almost balanced, all of the collector currents of the transistors 66 and 80 are supplied from the constant current transistors 72 and 73, and the collector currents of the transistors 78 and 66.
．． 81 becomes zero, only the collector current of the constant current transistor 76 is supplied to the load resistor 79, and the potential of the output terminal 6c becomes 1o-Ro.

In this way, the output voltage of the Hall IC 6 changes in three stages depending on the position of the Hall power generator 62 facing the identification band 5.

FIG. 4 shows the relative positional relationship between the main magnetic pole and the identification band of the non-commutator motor configured as shown in FIGS. 1 and 2, and the changes in the position detection signal obtained from the hole IC6. The relative rotation angle between the identification band 5 provided on the rotor and the Hall IC 6 placed on the stator is 4th.
When the mechanical angle or electrical angle changes as shown in the figure, the output voltage of the Hall IC 6 changes as shown in FIG. 4a) correspondingly.

Next, FIG. 5 shows an example of a flowchart when the sequential circuit 200 shown in FIG. 2 is realized by software such as a microcomputer.
01, it is determined whether the signal line 100n in FIG. Move the process to 202, but if not, move to branch 20
3, it is determined whether the Hall IC 6 is facing the S-pole magnetized portion of the identification band 5, and if yes, the process moves to processing block 204; if not, the process moves to processing block 205. The processing block 202 transfers the processing to the drive signal generation circuit 300 shown in FIG.
Of the signals in the system, only one corresponding to the N pole portion is activated, which corresponds to activating only one of the three output ports in a microcomputer.

When the processing in processing block 202 is completed, processing moves to branch 206 where processing in branch 203 is completed.
Similarly, it is determined whether or not the signal line 1oss in FIG. -ru.

In the processing block 204, only one of the three systems of signals supplied to the drive signal generation circuit 300, which corresponds to the S pole portion, is activated, and when this processing is completed, the processing moves to branch 207.

In the branch 207, the signal line 10o of FIG.
It is determined whether or not z is in the active state, and if yes, the process moves to the processing block 205, but if not, the determination by the branch 207 is executed again.

In the processing block 205, of the three systems of signals supplied to the drive signal generation circuit 300, only one corresponding to the non-magnetized portion is activated, and when this processing is completed, the processing moves to branch 208.

In the branch 208, similarly to the branch 201, it is determined whether or not the signal line 100S in FIG. The determination by branch 208 is executed.

In this way, immediately after the start, the branch 201
Alternatively, the branch 203 may cause the signal line 10 to
Outputs corresponding to the signal lines in the active state among 00.100s and 100z are supplied to the drive signal generation circuit 300, but after that, the outputs are supplied to the processing block 202, the branch 206, the processing block 204, and the branch 20.
7. Since the processing block 205 and the branch 208 enter the loop, the signal line 1
Only when the signal lines become active in the order of 00n, l00s, and I00z, the drive signal generation circuit 3
The state of the output supplied to 00 changes.

That is, the sequential circuit shown in FIG. 5 has three output sections that are connected to each other in a ring shape and send drive command signals to the drive signal generation circuit 300, that is, the processing blocks 202, 204, and 205. and the signal line 10
A sequential circuit that changes the output state of the output section only when a pre-sequenced signal line among 0n, 100s, and 10oz becomes active, and further constituted by the branches 201 and 203, The apparatus also includes an initialization circuit that makes the output state of the sequential circuit dependent on the output state of the distributor 100 to the signal lines 100n and l00s % l00z when the rotor is started.

Now, FIG. 6 shows an example in which the sequential circuit 200 of FIG. 2 is constructed using /X-toware, and its basic operation is the same as the flowchart of FIG. 5.

In FIG. 6, each first input terminal 211a
.

212a and the prong terminal are cross-coupled with each other (
NAND gates (positive logic NOR gates) 211 and 212 connected to the
ll! by NAND gates 1 to 213 to which the second input terminal 211b of ND gate 211 is connected. The first
logic block 210 and NAND gate 2 with the same configuration
Second logical block 220 according to 21.222.223
and NAND gates 231, 232, 233 with the same configuration.
A third logic block 230 constitutes a unit, and the output of the NAND gate 232 is supplied to the second input terminal 212b of the NAND gate 212 and the first input terminal 213a of the NAND gate 213. Second input terminal 222 of gate 222
b and the first input terminal 223 of the NAND gate 223
A is supplied with the output of the NAND gate 212, and the output of the NAND gate 222 is supplied with the second input terminal 232b of the NAND gate 232 and the first input terminal 233a of the NAND gate 233, thereby forming a sequential circuit. has been done.

Further, the second input terminals 213b, 223b, 233b of the NAND gate 213.223.233 are connected to the input terminals s1, nLzl connected to the signal lines 100s, 100n, 100z in FIG. Output terminals s2, n2, and Z2 for supplying drive command signals to the drive signal generation circuit 300 shown in the figure are connected to the output terminals of the NAND gates 211, 221, and 231, respectively.

Furthermore, the third input terminals 212c1222c1232c of the NAND gates 212, 222, and 232 are all initialization signal input terminals j1 connected to the J terminal in FIG.
It is connected to the.

Now, an outline of the operation of the sequential circuit shown in FIG. 6 will be explained based on the output waveform of the position detection signal shown in FIG. 4.

First, as already explained, the signal waveform in FIG. 4 a) shows the output signal of the Hall IC 6 in FIG. 2, and the signal waveform in FIG. The signal line 100 is connected by the distributor 100 based on the output signal of
This is a signal waveform appearing on each signal line after being distributed to n, 100s, and 100z.

In the following description of the operation of the logic circuit, positive logic will be used and each signal line will be in an active state when it is at a high potential.

Further, a high potential state is expressed as "H", and a low potential state is expressed as 'L'.

Now, when the motor rotation is stopped or immediately after the power is turned on, the level of the initialization signal input terminal jl in Fig. 6 is "
It is set to L, and the NAND gate 212.222.2
Since the output level of 32 is held at "H" due to strong fBq, the level of output terminal n2.s2.z2 is the same as that of input terminal n.
1. s1. It becomes equal to the level of z 1.

Now suppose that the Hall IC 6 in Fig. 2 has an electrical angle of 0 in Fig. 4.
If the output terminal Z is opposite to the position of
2 level or "I-1", the output terminal n2.
The level of s2 becomes "L"7, but this state continues even after the level of the initialization signal input terminal j1 shifts to "H", the rotor of the motor starts rotating and the Hall IC 6 changes to the identification band. The level of the input terminal z1 shifts to "L", and the level of the input terminal nl shifts to "H" instead.

Before the level of the input terminal 1 shifts to H, the output level of the NAND gate 2.12 has become H, so the output level of the NAND gate 223 becomes "L".
, NAND gate 221 and NAND gate 22
By inverting the output state of the gate pair according to 2, the NAN
The output level of the D gate 221 becomes H, and the NAN
The output level of the D gate 222 is LL'7.

As the output level of the NAND gate 222 shifts to 'L', the NAND gates 231 and 23
2, the output state of the gate pair is inverted, and as a result, the level of the output terminal n2 shifts to H' and becomes active, U7, and the level of the output terminal Z2 shifts to "L" and the output Terminals s2 and 7 are also inactive.

When the rotor further rotates and the Hall IC 6 reaches the electrical angle position of 180° as shown in FIG. 4, the level of the input terminal Z1 shifts to H' again as shown in FIG. 4d). At this point, the output level of the NAND gate 222 has shifted to "L", so the third logic block 2
30, the output terminal n2. s2. The output state of z2 also remains unchanged.

Subsequently, the level of the input terminal s1 shifts to normal.
Before that, the output level of the NAND gate 232?
Since it is H', the output level of the NAND gate 213 shifts to "L", and the NAND gate 211 and NAND
The output state of the gate pair by the gate 212 is inverted, and the level of the output terminal s2 shifts to "H", and the level of the output terminal n2 shifts to "L".

After all, the sequential circuit shown in FIG. 6 has a function of reflecting the input to the output only when the input terminal becomes active according to the prearranged order.

In this way, the input terminal n1. of FIG. s1. z
A position detection signal as shown in FIG. 4 b), c), and d) is supplied to output terminal n2. s2. z
Drive command signals as shown in Fig. 4 e), f), and g) are outputted to 2.

As is clear from FIG. 4, by using a sequential circuit as shown in FIG. 5 or FIG.
It is also possible to include other information in the file.

For example, the area around the electrical angle of 540° in the identification band in Figure 4 is magnetized in a pattern different from other parts, but while the motor rotor is rotating, this unique pattern remains in the output state of the sequential circuit. Since it has no effect, it can be actively used for other purposes as described below.

At around 7, the signal waveform of FIG. 4C) and the signal waveform of FIG. 4R> are compared.7 It can be seen that they are exactly the same.

If the use of the sequential circuit is limited to the magnetized identification band as shown in FIG. 4, the detection signal supplied to the input terminal sl in FIG. 6 will be directly output as the output terminal s2. This means that there is no problem in transmitting the information to

FIG. 7 shows a simplified sequential circuit taking these matters into consideration. In Figure 7, the NA of Figure 6
An inverter 214 is used instead of the ND gate 213, and an inverter 234 is used instead of the gate pair of NAND gates 231 and 232, but its operation is almost the same as that of the sequential circuit shown in FIG. Explanation will be omitted.

Next, FIG. 8 shows a specific circuit configuration example of the slope generating circuit 500 shown in FIG.
The output signal of the amplifier 400 in the figure is supplied to the amplifier 501.
The output is amplified until it becomes a square wave.

At the leading edge of the output signal of the amplifier 501, a first trigger pulse generation circuit composed of NAND gates 502, 503, and 5041m generates a trigger pulse, and at the trailing edge, an inverter 505. A second trigger pulse generation circuit formed by NAND gates 506, 507 and 508 generates a trigger pulse.

On the other hand, NAND gates 509, 510 . Inverter 51
1° transistor 512, 513, 514, 515, 5
16,517, diode 518. Resistance 519, 520
,521,522.523,524. capacitor 525
constitutes a monostable multivibrator, and the first
The output signal of the second trigger pulse generation circuit becomes the trigger signal of this monostable multi-high brake.

Further, the charge/discharge signal waveform of the capacitor 525 is supplied to the first output terminal g1, and the output signal of the monostable multivibrator is supplied to the second output terminal h1 via the inverter 526.

Therefore, when the signal waveform shown in FIG. 9 d) is supplied to the input terminal f1, the signal waveforms appearing at the output terminals gl and hl are as shown in FIG. 9 e) and f), respectively.

Note that the signal waveforms in FIGS. 9a), b), and c) are input to the input terminal n3. of the drive signal generation circuit 300, which will be described next. s3.
It shows the drive command signal supplied to z3.

Now, before going into a specific explanation of the drive signal generation circuit 300 shown in FIG. 2, the operation of switching the energization state to the stator winding of the DC non-commutator motor shown in FIGS. 1 and 2 will be explained. do.

As is clear from FIGS. 1 and 2, in the DC commutatorless motor described as an embodiment of the present invention, the means for detecting the static position of the rotor is a circle having three types of components. Since it is only provided with an annular identification band 5 and only one Hall IC 6, only three types of identification can be performed depending on the resting position of the rotor.

However, as is well known, if a three-phase full-wave drive is used, six types of position detection information are required depending on the stationary position of the rotor.

In the DC non-commutator motor shown in Fig. 2, current is supplied to all three-phase dark constant windings m1, 2, and 3 based on the output signal of the Hall IC 6 until the rotational speed of the motor increases to a certain extent. This causes an extra current to flow, preventing a drop in starting torque, increasing the rotational speed of the motor, and increasing the power generation winding 7.
After a sufficient signal is obtained from the power generation winding 7 and the Hall IC 6, the drive signal generation circuit 300 generates an energization switching signal for three-phase full-wave drive based on the output signal of the power generation winding 7 and the output signal of the Hall IC 6.
It is configured to be generated internally.

The principle of switching the drive mode will be explained using FIG. 10.

Figure 1O a) shows the permanent magnet 4 in the motor structure of Figure 1.
Each stator winding 1 when the main magnetic pole of is sinusoidally magnetized
．． 2.3 shows the torque characteristics generated when current is passed, and the counterclockwise rotational torque is taken as the positive direction.

In Fig. 10a), the characteristic curve ua represents the torque generated when a current is passed through the stator winding 1 of Fig. 1 from the U terminal to the X terminal, and the characteristic curve ub represents the stator winding 1 shown in Fig. 1. The line (3) represents the torque generated when a current is passed from the X terminal toward the U terminal.

Further, the characteristic curve va represents the torque generated when the stator winding 2 in FIG. 1 is energized from the
It represents the torque generated when electricity is applied from the terminal toward the V terminal.

Furthermore, the characteristic curve wa represents the torque generated when the stator winding 3 in FIG. 1 is energized from the W terminal to the This represents the torque generated when current is applied in the direction of the W terminal.

On the other hand, Figure 1C) shows the torque generated in the positive direction when any two phases of the star-connected three-phase stator windings are energized. As is well known, in a three-phase full-wave drive motor, the envelope of these curves is the actual output torque waveform.

That is, in Fig. 1O C), the characteristic curve wv is the first
The characteristic surface 111Ruv represents the torque generated when current flows from the W terminal to the V terminal in the figure, and the characteristic curve uw represents the torque generated when current flows from the U terminal to the V terminal. Characteristic curve 4 represents the torque generated when current is applied from the U terminal to the W terminal, and characteristic curve 4 represents the torque generated when current is applied from the V terminal to the W terminal. vu
represents the torque generated when current is applied from the V terminal toward the U terminal, and the characteristic curve wu represents the torque generated when current is applied from the W terminal toward the U terminal.

Assuming that the maximum torque generated by each stator winding is 1, in three-phase full-wave drive, the energization to the square stator windings is switched every 60 degrees electrical angle, so the maximum torque after combining Tma,.

The minimum torque Tm+++average torque Taν is given by the following equation. (In this case, each torque is expressed as a simple index without any units.) Figure 10 d) shows the output signal waveform of the pole IC 6 that has been explained previously, and Figure 1 O e) shows the output signal waveform of the amplifier circuit 501 used inside the slope generation circuit 500, but when the rotor of the motor is stopped, the output of the Hall IC 6 is used as the position detection information. Only signals can be used.

In order to start the motor using only three types of position detection information, a three-phase half-wave drive may be used, but in that case, the star-connected stator windings shown in Figure 2. A power switching element is required to directly connect the X terminal, which is the midpoint between the two, to the positive or negative feed line.

In the embodiment of the present invention, such inconvenience is solved by the method described below.

That is, in correspondence with the three-stage level change of the output signal of the Hall IC 6, the section where the output signal is at a high potential is set as a first energizing section, the section where the output signal is at a low potential is set as a second energizing section, and an intermediate potential. A certain section is defined as the third energized section, and the
In the energizing section, electricity is passed from the U terminal to the V terminal and the W terminal in FIG. 2, and in the second energizing section, electricity is passed from the V terminal to the W terminal and the U terminal, and In the energizing section No. 3, electricity is supplied from the W terminal to the U terminal and the V terminal.

At this time, the resultant torque characteristic of the three-phase fixed 1,000-turn Ml, 2.3 is as shown in Fig. 10b), and the characteristic surface #+1! t
Ic represents the torque generated due to energization in the first section, characteristic curve VC represents the torque generated due to energization in the second section, and characteristic curve we represents the torque generated due to energization in the section 2 and 3 above. It represents torque.

Therefore, the output J torque of the motor when the energization is switched at the ideal timing is equal to the envelope of the characteristic curve in Figure 10b), and the main winding among the three-phase stator windings. The maximum torque Tma2. Minimum torque Tm12. Subtracting the average torque Taν2 results in the following.

As is clear from comparing equations (3) 2 and (6),
Even at startup, it is possible to obtain the same average torque as in three-phase full-wave drive, and the starting current can be saved compared to when three-phase half-wave drive is performed by adding an extra power switching element. can.

By the way, assuming that the resistance value per l-phase of each stator winding is the same in either drive method, the starting current in three-phase half-wave drive is twice that of three-phase full-wave drive, but this will be explained here. With this driving method, the starting current increases by only about 33%.

In the drive signal generation circuit 300 shown in FIG. 2, the drive mode is switched by utilizing the fact that the error voltage from the servo system supplied to the E terminal reaches its maximum when the motor is started.

FIG. 11 is a circuit wiring diagram showing a specific example of the configuration of the drive signal generation circuit 300, and the input terminal E is a terminal to which an error voltage is supplied from the outside, and is the same as the E terminal in FIG. It is.

Input terminal f3. g2. h2 are the output terminals f2.h2 of the slope generation circuit 500 shown in FIG. gl, hl, and the signal waveforms shown in FIG. 9 d), e), F) are supplied to the input terminals n3. s3. Position detection signals shown in FIG. 9 a), b), and c) are supplied to z3, respectively.

An overview of the operation will be explained based on the signal waveform diagram in Figure 9.
When the motor starts, the maximum voltage is supplied to the E terminal, and the transistors 301, 302, 303, 304
．． A comparator constituted by constant current transistor 305 operates to turn on transistor 306.

When the transistor 306 is on, the transistors 307, 308, 309, 310, 311, 312
, 313.314, 315 is not supplied with power, and therefore the second current mirror circuit constituted by transistors 316.3.17 is also cut off, and transistor 3
18.319, 320, 321.322, 323, 32
The third Nornt mirror circuit constituted by No. 4,325.326 is also cut off.

On the other hand, since one end of the resistor 327 is connected to the positive feed line 300a by the transistor 306,
Transistors 328, 329, 330, 331. '33
2 and 333 are both in a power supply waiting state, and are turned on by the flow of the Hass current.

Assuming that the level of the input terminal port 3 is IHI and the levels of the input terminals S3 and Z3 are L', the transistors 334, 335, and 336 are turned on, and as a result, the transistors 328, 329, and 332 are turned on. is in the on state and the output terminals upl, wnl, vn
It becomes possible to supply current from l.

Further, if the level of the input terminal s3 is H' and the level of the input terminals 23 and n3 is l L +, the transistor 337°338.339 is turned on,
Current supply from the output terminal vpLwnl+uni becomes possible, and when the level of the input terminal Z3 is H', the level of the input terminal u3. If the level of v3 is l L 1, the transistors 340, 341, and 342 are turned on, and current can be supplied from the output terminals wpl, uni, and vnl.

FIG. 12 is a circuit connection diagram showing a specific example of the configuration of the drive circuit 700 in FIG. 2, with input terminals un2. νn2. lol
n2. uρ2゜VD2. W+)2 are the output terminals uni and vn of the drive signal generation circuit 300 shown in FIG.
l,wn1. Connected to upl, vpl, and wpl.

Therefore, even if the level of the initialization signal input terminal J2 connected to J@ in FIG.
When current is supplied from the 2 terminal, the SN2 terminal, and the wn2 terminal, the transistors 701, 702, and 703 become conductive, and the output terminal U becomes conductive.

The stator windings l are star-connected to V and W as shown in Figure 2,
Assuming that the terminals 2 and 3 are connected, current is supplied from the U terminal to the ■ terminal and the W terminal.

Similarly, when current is supplied from the vp2 terminal, wn2 terminal, and un2 terminal, the transistor 704.7
05 and the transistor 703 become conductive, current is supplied from the V terminal to the W terminal and the U terminal, and when current is supplied from the wp2 terminal, ur+2 terminal, and υn2 terminal, the transistor 706 and the transistor 702 , 705 are brought into conduction, and current is supplied from the W terminal to the U and V terminals. In this way, the motor starts rotating, as is clear from the output torque characteristics shown in Figure 10 b), but when the rotational speed of the motor increases to a certain extent and the potential of the E terminal in Figure 11 decreases. The transistor 306 turns off, and the collector current of the transistor 345, which constitutes a differential amplifier circuit together with the transistor 343 and the constant current transistor 344, starts to flow between the collector and emitter of the transistor 308, and the transistors 309 to 309
315 are all activated, and current is also supplied to the transistor 316 constituting the second current mirror circuit via the transistor 309. Note that the output currents of the transistors 309 to 315 vary depending on the potential of the error voltage supplied to the E terminal.

By the way, D flip-flops (delayed flip-flops) 346, 347, 348, 349, 350. :
351. AND-OR gate (AND means the logical product of positive logics, and OR means the logical sum of positive logics) 352
, 353, and 354 are supplied with the position detection signals shown in a), b), and c) of FIG. 9, and the rotation detection signal shown in FIG. A signal shown in FIG. 9f) is supplied as a clock signal to the D flip-flops 346 to 351 through the D flip-flops 346 to 351.

Therefore, the D flip-flops 346, 348.3
The signal waveforms shown in FIG. 9 g>, h) and i> appear at the output terminal of the D flip-flop 3
The output terminals of 47, 349, and 351 are
), the signal waveforms shown in l) appear.

During the period when the output of the D flip-flop 346 is at "H", the transistor 356 is in the off state, and the D flip-flop 346 is in the OFF state.
While the output j of the flip-flop 347 is at the H level, the transistor 357 is off.

Similarly, the D7 lift props 348, 349, 35
The period during which the output of 0°351 is at the 'H level is, respectively.
Transistors 358, 359, 360, and 361 are turned off.

On the other hand, the slope current generating transistor 362 is supplied with a signal waveform shown in FIG. Furthermore, since the current depending on the output current of the transistor 309 flows into the transistor 317, the collector current of the transistor 362 depends on the collector current of the transistor 345 constituting the differential amplifier circuit. It has a peak value of
This results in a sawtooth wave equal to the slope of the signal waveform in Figure e).

The collector current of the transistor 362 is supplied to a third current mirror circuit constituted by the transistors 318 to 326, and the collector current of the transistor 320
The same current flows through transistors 365, 366.36
7.368, 369.370, 371. 372i is supplied to a fourth Norlint mirror circuit configured in series.

Note that by setting the output current of the constant current transistor 364 and the resistance value of the resistor 363 to appropriate values, or by adjusting the resistance value of the emitter side resistor of each current mirror circuit, the first current mirror Maximum output current of transistors 310 to 315 forming the circuit and transistors 321 to 32 forming the third current mirror circuit
The maximum output currents of transistors 367 to 372 constituting the fourth current mirror circuit can be made equal, and the magnitude of these maximum output currents is determined by the error supplied to the E terminal. Depends on voltage.

Now, when the output of the D flip-flop 350 and the output of the D flip-flop 351 are both at the "H level", that is, in the section PI of FIG. 9, the output of the AND gate 373 becomes the "I-1" level. Transistor 374 is turned off, and transistor 322
A sawtooth current is supplied to the output terminal wnl via the output terminal wnl.

Subsequently, the output level of the D flip-flop 346 is
l-1'', the transistor 356 is turned off, and current is now supplied to the output terminal via the transistor 311, but the D flip-flop 3
When output J of 46 and the output of the D flip-flop 347 are both at the "H" level, that is, in section P2 of FIG. 9, the output of the AND gate 375 is lH.
Since the voltage becomes L level, the transistor 376 is turned on, and a sawtooth current flows through the collector of the transistor 368.

Therefore, the current supplied to the output terminal wnl gradually decreases, and eventually the current waveform supplied to the output terminal wnl becomes as shown in FIG. 9m).

Regarding the current waveforms supplied to other output terminals, the AN
D gate 373.375 and other AND games 1-377.
Similar operations are performed by 378°379.380, so that the output terminals unl, vnl, vp1 .
wp1. The current waveform supplied to upl is shown in Figure 9 m>,
o), p), g), r>.

Note that the waveforms indicated by broken lines in FIGS. 9m) to 9r) are current waveforms when the rotational speed of the motor increases and the potential of the E terminal decreases.

The six types of current signals generated in the drive signal generation circuit of FIG. 11 in this way are supplied to the drive circuit of FIG.
6, the identifier windings 1, 2.3 are energized.

By the way, assuming that the transistor 701 in FIG. 12 is made as a collection of many small signal transistors on an IC board, and the transistor 707 is assigned to one of them, the transistor 701 and the transistor 707 form a current mirror circuit. The collector current of the transistor 707 is one-half of the collector current of the transistor 701.

When the resistance value of the resistor 708 is zero, the value of K is equal to the emitter area ratio of the transistor 701 and the transistor 707. However, as the resistance value of the resistor 708 increases, the value of K also increases. The value is influenced by the collector current of the transistor 707.

That is, the emitter junction area of the transistor 701 is SX, the emitter junction area lx, and the transistor 70
The emitter junction area of 708 is Sy, the emitter current is Iy, the resistance value of the resistor 708 is Re, and the electron charge is q.
, Boltzmann's constant is k.

When the absolute temperature of the junction is T, the following relational expression holds true.

The collector current of the transistor 707 is supplied to a resistor 709, and the collector current of the transistor 701 is limited so that the voltage across the resistor 709 is finally equal to the voltage across the input resistor 710.

Therefore, if the input current is I+, the transistor 70
1 collector current to 12. The resistance value of the resistor 710 is R
++If the resistance value of the resistor 709 is R2, the current amplification factor Gl in this part is given by the following equation.

The above explanation has led to the fact that the current amplification factor of the power supply block with the transistor 701 as the output section is almost constant (in other words, it is not affected by variations in the DC current amplification factor of each transistor). The five power feeding blocks are also configured based on the same operating principle and therefore operate in the same manner.

Now, since the level of the initialization signal human horn terminal j2 in FIG. 12 is "L" when the motor is stopped or immediately before starting, the transistor 711 is in the on state, and the transistors 712, 713, 714, The current mirror circuit constituted by transistors 715, 716, 717 and the current mirror circuit constituted by transistors 718, 719, 720゜721.722 are both in a cut-off state,
Transistors 701.702, 703.704, 705
is not supplied with base current.

Seven times, only transistor 706 is transistor 7.
Since the base current is supplied through 23, the transistor 706 is turned on.

However, since all of the transistors 702, 703, and 705 are in the off state, the stator winding l in FIG.
, 2.degree. 3, no current that generates rotational force flows through them, and the current necessary for detecting the static position of the rotor is supplied to the Hall IC 6 via the current limiting resistor 8.

When the motor is started, the level of the initialization signal input terminal j2 shifts to "H", so the transistor 723 is turned off, but the stator windings 1 to 3 are immediately supplied with a signal based on the position detection information when the motor is stopped. Electricity is applied in the energization mode, and the current necessary for detecting the rotational position continues to be supplied to the hole Ic6.

Note that even if the power supply to the Hall IC 6 is temporarily cut off when the motor is started due to the influence of the inductance of the fixed manual winding I11! Since the signal is supplied to the drive signal generation circuit via the circuit shown in the figure, the previous information is retained.

Next, FIG. 13 is a circuit connection diagram showing a specific configuration example of the extraction circuit 600 of FIG. 2, in which input terminals n4. s4
are connected to the signal lines 100n and 100s shown in FIG. 2, respectively, and the position detection signals shown in FIGS. 14a) and 14b) are supplied.

The signal supplied to the input terminal s4 is the NAND gate 6
01 and a first flip-flop with a NAND gate 602, a NAND gate 603, and a NAND gate 604.
The signal supplied to the input terminal n4 is used as a reset signal for the second flip-flop by NAND gate 605 and the third flip-flop by NAND gate 606, and the signal supplied to the input terminal n4 is the output of the first to third flip-flops. It is used as an update signal.

Therefore, in the configuration of FIG. 13, while the level of the input terminal s4 is L°, the level of the n4 terminal is 3°.
An output signal appears at output terminal B when the number of times changes.

Figure 14 c), d>, and e) correspond to N in Figure 13, respectively.
This shows the output signal waveforms of the AND gates 1301, 603, and 605. In this way, an absolute position detection signal is obtained from the output terminal B once per rotation of the rotor.

Now, returning to FIG. 2, the outline of the operations explained so far can be summarized as follows.

First, when the rotor is stopped, the U terminal,
■Of the terminals and the W terminal, only the W terminal is at a high potential, and the Hall IC 6 is passed through the stator winding 3 and the current limiting resistor 8.
A current is supplied to detect the resting position of the rotor, and the Hall IC 6 generates an output of a high potential, an intermediate potential, or a low potential depending on the resting position.

Note 1. In this embodiment, in order to minimize the number of connecting wires between the motor block IO and the other circuit block 7, power is supplied to the Hall IC 6 from the midpoint of the three-phase stator winding, and its output is converted into a ternary signal. However, even if the Hall IC is supplied with power from a separately provided power supply terminal and the number of output terminals is increased to two or three, this does not deviate from the object of the present invention.

Depending on the output level of the Hall IC 6, one of the signal lines 100n, 100s, and 100z is activated by the distributor 100, and this position detection information is supplied to the drive signal generation circuit 300 via the sequential circuit 200. However, until the rotor starts rotating, the sequential circuit 2
00 acts as a simple buffer.

Based on the position detection information supplied to the drive signal generation circuit 300, the drive signal generation circuit 300 and the drive circuit 70
0 sets any one of the U terminal, ■ terminal, and W terminal to the "H" level, and sets the remaining terminals to the "L" level to generate rotational torque in the rotor.

At this time, if the Hall IC 6 happens to stop at a position where the electrical angle of rotation is 60° in Figure 1O, that is, at the boundary between the N and S poles of the identification band 5, or at a position where the electrical angle of rotation is 390°. In either case, the Hall IC 6 generates the same output as when facing the non-magnetized portion of the identification band 5, and the stator windings 1 to 3 are energized based on that information. As can be seen from the characteristic curve in FIG. 1O b), the rotor will generate rotational torque in the opposite direction.

However, by moving the rotor by a very small amount, regular position detection information can be obtained, and after that, the order in which position detection signals are received is regulated by the sequential circuit 200, so that smooth rotation can be maintained. .

When the rotational speed of the rotor increases to a certain level, the potential at the E terminal in FIG. The rotary torque characteristics of the child are as shown in the envelope of the characteristic curve shown in Figure 1C).

Furthermore, in the embodiment, the sawtooth wave generated by the slope generation circuit 500 is used to gently switch the energization to the stator windings 1 to 3.
It can also prevent the stator windings and stator frame from acting like a speaker due to sudden energization switching, which can cause noise during rotation, and also prevent electrical noise from being generated by spike pulses in the stator windings. It is also possible to prevent the IC from being destroyed by surge voltage.

As described above, the slope generating circuit 500 is extremely useful when this type of DC non-commutator motor is used in electronic equipment, but even if it is deleted to simplify the system, it will deviate from the purpose of the present invention. It's not a thing.

In the embodiment of the present invention, the identification band 5 has three parts: a N-pole magnetized part, an S-pole magnetized part, and a non-magnetized part.
However, in constructing the non-magnetized part, the N-pole part and the S-pole part are arranged in parallel in the circumferential direction in the region, and the scanning trajectory of the position detection element is set in the region. It may be configured to coincide with the boundary line between the N-pole magnetized portion and the S-pole magnetized portion.

In addition, the Hall IC shown in the embodiment can be used as a position detection element.
In addition to 6, general Hall power generation elements, light receiving elements, and magnetoelectric conversion elements can also be used, but by using Hall IC, the connection line between the motor block 10 in Fig. 2 and the circuit block part in It becomes easier to reduce the number of snakes.

When using a light-receiving element as a position detection element, an identification band with three types of components (areas) with different light transmittances or light reflectances is required, and variations in the sensitivity of the light-receiving element and It is also necessary to pay sufficient attention to variations in the emission intensity.

Effects of the Invention As is clear from the above description, the DC non-commutator motor of the present invention includes three-phase stator windings 1 to 3 and a permanent magnet 4 having a plurality of magnetic poles facing the stator winding. a position detection element (Hall IC 6 in the embodiment) that detects the rotational position of the rotor, and the position detection element has three different levels depending on the rotational position of the rotor. The first, second, . an annular identification band 5 having a third component; a driving means for supplying current to the stator winding (in the embodiment, a driving signal generating circuit 3;
00 and the drive circuit 700 constitute a drive means, but the drive signal generation circuit 300 is necessary to switch the mode of energization to the stator windings, so it is deleted. Even if this is done, it does not depart from the spirit of the present invention. ), the output of the position detection element is transmitted to a first signal line 100n and a second signal line 100s according to its level.

It has a distributor 100 that distributes to a third signal line of 10 oz, and three output parts that are connected to each other in a ring shape and send out a drive command signal to the drive means, a sequential circuit 200 that changes the output state of the output section only when the signal line is activated; and an initial circuit that makes the output state of the sequential circuit dependent on the output state of the distributor when the rotor is started. The output of the position detection element, the output of which changes in three ways depending on the rotational position of the rotor, is conditioned by the sequential circuit and then supplied to the drive means. As a result, even though only a very simple position detection mechanism is provided, smooth activation and rotation can be achieved. In an embodiment in which the second component is arranged with a narrow width, the first component corresponds to a portion magnetized to N pole, and the second component corresponds to a non-magnetized portion. , these assignments can be set arbitrarily. ), by providing an extraction circuit 600 that extracts the output change of the position detection element in the second component portion and outputs it as an absolute position detection signal of the rotor, without adding an extra element. It is possible to obtain one or several layers of PG pulses per rotation, which is extremely effective.

In the detailed embodiment shown in FIG. 7, the first input terminal and the output terminal are cross-coupled to each other. a second logic gate (in the embodiment, a NAND gate 211 and a NAND gate 21);
2 is used, but if you change the input/output logic from positive logic to negative logic, these will be immediately replaced with NOR gates, so it is not limited to NAND gates, but can also be used with other logic gates. I can't help you. 〉, and the third . a fourth logic gate I (in the embodiment, NAND gates 221 and 223), a fifth logic gate whose output terminal is connected to the second input terminal of the third logic gate; is a NAND gate 223), and the third . A sixth logic gate (NAND gate 233 in the embodiment) to which the output of the gate pair by the fourth logic gate is supplied;
The second input terminal of the fourth logic gate and the first input terminal of the fifth logic gate are connected to the first . a second input terminal of the first logic gate, a second input terminal of the fifth logic gate, and a second input terminal of the fifth logic gate; Detection signals appearing on the first signal line, the second signal line, and the third signal line are respectively supplied to the second input terminals of the second .
An initialization signal is supplied to the third input terminal of each of the fourth logic gates, the first to sixth logic gates constitute a sequential circuit, and the second to sixth logic gates constitute a sequential circuit. The third input terminal of each of the fourth logic gates constitutes initialization means. Furthermore, in the detailed embodiment shown in Figure 't46, the first . Second
logic gate (in the embodiment, NAND gate 21)
1 and NAND gate 212), a third logic gate whose output terminal is connected to the second input terminal of the first logic gate (NAND gate 213 in the embodiment), and a respective first input terminal. The fourth output terminal has a highly cross-coupled connection. a fifth logic gate (in the embodiment, NAND gate 221 and NAND gate 22);
2) a sixth logic gate (NAND gate 223 in the embodiment) whose output terminal is connected to the second input terminal of the fourth logic gate; the seventh cross-coupled to
．． an eighth logic gate (NAND gate 231 and NAND gate 232 in the embodiment), and a ninth logic gate (NAND gate 231 and NAND gate 232 in the embodiment) whose output terminal is connected to the second input terminal of the seventh logic gate. gate 233), the seventh input terminal is connected to the second input terminal of the second logic gate and the first input terminal of the third logic gate, respectively.
．． An output of a gate pair by an eighth logic gate is provided to the second input terminal of the fifth logic gate and the first input terminal of the sixth logic gate, respectively. the output of the gate pair by the second logic gate is provided to the second input terminal of the eighth logic gate and the first input terminal of the ninth logic gate, respectively. a gate pair output by a fifth logic gate, a second input terminal of the third logic gate, a second input terminal of the sixth logic gate, a second input terminal of the ninth logic gate; Detection signals appearing on the first signal line, the second signal line, and the third signal line are supplied to the input terminals, respectively, and the second . Fifth. An initialization signal is supplied to the third input terminal of each of the eighth logic gates, the 1-49th logic gates constitute a sequential circuit, and the 2nd. Fifth. The initialization means is constituted by each input terminal of the eighth logic gate. Therefore, when the device is integrated into an IC, there is no need to add extra individual parts, and at least two sets of logic gate pairs are used. Since the output states of the first to third signal lines are maintained by the above, even if the position detection information is temporarily interrupted when starting the rotor, accurate information can be transmitted to the drive means. The effect is thick L).

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of a motor section configured to carry out the present invention, Fig. 2 is a block diagram of a DC non-commutator motor according to an embodiment of the present invention, and Fig. 3 is an internal circuit of a Hall IC. A wiring diagram, Fig. 4 is a signal waveform diagram corresponding to the magnetization pattern of the identification band to explain the processing operation of the position detection signal, Fig. 5 is a flowchart when realizing a sequential circuit with software, and Fig. 6 7 is a circuit connection diagram showing an example of the configuration of a sequential circuit, FIG. 8 is a circuit connection diagram showing an example of the configuration of a slope generation circuit, and FIG. 9 is a signal waveform diagram for explaining the processing operation of a position detection signal. , FIG. 10 is a torque characteristic diagram for explaining the torque characteristics of the motor and energization switching,
FIG. 11 is a circuit connection diagram showing a specific example of the drive signal generation circuit, FIG. 12 is a circuit connection diagram showing a specific example of the drive circuit, and FIG.
FIG. 3 is a circuit connection diagram showing a configuration example of the extraction circuit, and FIG. 14 is a signal waveform diagram of each part of the circuit of FIG. 13. 1.2.3...Stator winding, 4...Boss magnet, 5...Identification band. 6...Hall IC, 100...Distributor, 200...Sequential circuit. 600...Extraction circuit, 700...Drive circuit. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure AJ B Figure 5 Figure 6 Figure 8 Figure 11. . tA (γnr--\r-1゛ゝr-1

Claims (6)

[Claims] (1) A position detection element for detecting the rotational position of the rotor on a rotor including a three-phase stator winding and a permanent magnet having a plurality of magnetic poles facing the stator winding; 11. An annular identification band having second and third components that causes the position detection element to generate outputs of three different levels depending on the rotational position of the child, and supplies current to the stator winding. and a distributor that distributes the output of the position detection element to first, second, and third signal lines according to its level, and are connected to each other in a ring shape to send a drive command signal to the drive means. It has three outputs for sending out a signal, and among the signal lines, pre-ordered signal lines are activated. ! : A non-rectified direct current comprising: a sequential circuit that changes the output state of the output section only when the rotor is started; and initialization means that makes the output state of the sequential circuit dependent on the output state of the distributor when the rotor is started. Child motor. (2) Eleventh and second logic gates whose respective first input terminals and output terminals are cross-coupled connected to each other, and whose respective first input terminals and output terminals are cross-coupled connected to each other. a fifth logic gate whose output terminal is connected to the second input terminal of the third logic gate, and whose first input terminal is connected to the third and fourth logic gates; a sixth logic gate supplied with the output of the gate pair by the gate, the second input terminal of the fourth logic gate and the first input terminal of the fifth logic gate respectively having the first, a gate pair output J by a second logic gate;
a first signal line, a second signal line, and a third signal line on the input terminal of the fifth logic gate, the second input terminal of the fifth logic gate, and the second input terminal of the sixth logic gate, respectively. and an initialization signal is supplied to the third input terminal of each of the second and fourth logic gates, and the first to sixth logic gates constitute a sequential circuit. 2. The DC non-commutator motor according to claim 1, wherein the third input terminal of each of the second and fourth logic gates constitutes initialization means. (3) Eleventh and second logic gates seven, each of which has its first input terminal and output terminal cross-coupled to each other, and whose output terminal is connected to the second input terminal of the first logic gate. a third logic gate (7), a fourth and a fifth logic gate whose respective first input terminals and output terminals are cross-coupled connected to each other;
a sixth logic gate to which the second input terminal of the logic gate is connected; a seventh and eighth logic gate to which the respective first input terminals and output terminals are cross-coupled connected to each other; a ninth logic gate whose terminal is connected to the second input terminal of the seventh logic gate;
The gate pair outputs of the seventh and eighth logic gates are supplied to the second input terminal of the logic gate and the first input terminal of the third logic gate, respectively, and the second input terminal of the eighth logic gate and the second input terminal of the eighth logic gate, respectively. supplying the output of the gate pair of the fourth and fifth logic gates to a first input terminal of the ninth logic gate, respectively, and a second input terminal of the third logic gate;
a first signal line to a second input terminal of the sixth logic gate and a second input terminal of the ninth logic gate, respectively;
supplying a detection signal appearing on a second signal line and a third signal line, and supplying an initialization signal to a third input terminal of each of the second, fifth, and eighth logic gates;
A sequential circuit is configured by the first to ninth logic gates, and the third logic gate of each of the second, fifth, and eighth logic gates
2. The DC non-commutator motor according to claim 1, wherein the input terminal constitutes initialization means. (4) a rotor including a three-phase stator winding, a boss magnet having a plurality of magnetic poles facing the stator winding, a position detection element that detects the rotational position of the rotor, and a rotor that detects the rotational position of the rotor; a first, a second, and a third +1 that cause the position detection element to produce three outputs with different levels according to the rotational position of the child;
The first component elements are arranged alternately along the circumferential direction, and
an annular identification band in which the second component is disposed with a narrow width in a part of the first component region; a drive means for supplying current to the stator winding; and a drive means for supplying current to the stator winding; A 3fIM output section is provided on the distributor that distributes the output to the first, second, and third signal lines according to its level, and is connected to each other in a ring shape to send a drive command signal to the drive means. , on a sequential circuit that changes the output state of the output section only when a pre-ordered signal line among the signal lines becomes active, and when the rotor is started, the output state of the sequential circuit is distributed to the initialization means for determining the absolute position of the rotor by extracting a change in the output of the position detection element at the part of the '2 component arranged narrowly in the identification band; A DC non-commutator motor equipped with an extraction circuit that outputs a detection signal. (5) a first flip-flop set when the first signal line becomes active and reset when the second signal line becomes active; the first flip-flop is set; a second flip-flop that is set when the first signal line becomes active and reset when the second signal line becomes active, 5. The DC non-commutator motor according to claim 4, wherein the absolute position detection signal is extracted from the output terminal of the second flip-flop. (6) A position detection element formed by an integrated circuit having a Hall power generation body therein and configured with a circuit that sends out the output of the Hall power generation body as an output signal whose potential changes in three stages; 5. The DC non-commutator motor according to claim 4, wherein power is supplied through the power supply terminals of the three-phase stator windings.