JPH0732628B2 - DC non-commutator motor - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a commutatorless motor having a relatively small capacity used under a DC power supply, and relates to a recording / reproducing device such as a video tape recorder or an air cooling fan motor. The present invention provides a suitable DC non-commutator motor.

Conventional configuration and its problems In recent years, DC non-commutator motors have been widely used in many audio equipments, video tape recorders, and even floppy disk drive devices. A DC non-commutator motor is used as the motor.

Conventionally, a two-phase or three-phase half-wave drive system or full-wave drive system has predominantly been used as a DC non-commutator motor of this type.

Each drive method has advantages and disadvantages. For example, the three-phase drive method requires a smaller number of drive power elements than the two-phase drive method, but has a larger number of position detection elements for detecting the rotational position of the rotor. Will be needed.

By the way, when compared to operate under a single power supply, two-phase full-wave drive requires eight power transistors and two Hall elements, and three-phase full-wave drive requires six power. A transistor and three Hall elements are needed.

Conventionally, many attempts have been made to reduce the number of position detecting elements in the three-phase drive method, and a typical technique thereof is disclosed in US Pat. No. 3,577,053 (hereinafter referred to as Document 1). There is.

In the above-mentioned Document 1, in a three-phase half-wave drive type non-commutator motor, the first, second, and third rotors having different light reflectances are provided.
By identifying a change in the rotational position of the rotor as a three-step change in the output level of the light-receiving element, a light-receiving element is provided with an identification band, and a light beam is applied to the identification band to detect reflected light. , A device configured to energize a phase winding depending on its level is shown.

Further, if the light beam is incident on the boundary portion between the first constituent element and the third constituent element at the time of starting the rotor, the output level of the light receiving element takes an intermediate value. The detection circuit operates as if the element part was detected,
Although it causes reverse torque and vibration of the rotor, it is described that the Schmitt circuit may constitute the output level determination circuit unit of the light receiving element to prevent this.

The same thing is disclosed in Japanese Patent Application Publication No. 46317, 1982 (hereinafter referred to as Document 2), and in Document 2 instead of the Schmitt circuit, the third component of the identification band is used. A drive circuit device provided with a memory circuit for storing that a portion is detected is shown.

In each of Document 1 and Document 2, the three-phase half-wave drive is enabled by the unique position detection element and the identification band for position detection, but the phase winding is performed without using any special position detection element. A method has also been proposed and put into practical use, in which the energization state of the wire is sequentially switched. (For example Sony Corporation)
CX20114 of a three-phase commutatorless motor drive IC manufactured by K.K. The patent application publication No. 33953 (hereinafter referred to as “Reference 3”) first describes the output signal of a self-propelled three-phase multivibrator. Switching the energization state to each phase winding,
A drive circuit device configured to switch the energization state to each phase winding by using a power generation waveform that appears in an idle winding of the three-phase stator winding after the rotor starts rotating. It is shown.

However, in the method shown in the above-mentioned document 3, since the windings of each phase are first energized indiscriminately, a reverse torque is instantaneously generated, or a sufficient starting torque cannot be obtained. However, it takes a long time to reach the desired rotation speed.

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

That is, if the formats shown in the documents 1 and 2 are used, 360
Since only 3 types of detection can be performed per electrical angle of °, switching of the energization state to each phase winding is inevitably permitted in 3 ways, and 6 phases of energization state switching are required. To realize the full-wave drive system, an extra position detection element and an identification band are required.

In addition, a motor that requires phase control, such as a cylinder drive motor (also called a drum drive motor) of a video tape recorder, requires a detection signal for the absolute position of the rotor once or several degrees. (Generally PG
It is called a pulse. ), This also requires an extra position detection element and an identification band.

Further, the Schmitt circuit shown in Document 1 and the memory circuit shown in Document 2 become large in size when they are configured by analog circuits, and extra parts such as capacitors are required. Considering the trend toward miniaturization of logic elements of digital ICs (the production cost per gate is rapidly decreasing), it is more rational to implement them with digital circuits, in which case the Schmitt circuit and memory circuit will eventually Although they all have the same configuration and both use flip-flops (bistable circuits), as is well known, the initial output state of the flip-flop is indefinite, and its output is set when the motor is started. An important issue is how to correlate with the output signal from the position detecting element.

However, Documents 1 and 2 do not mention this problem.

An object of the present invention is to realize a direct current non-commutator motor having a simplified mechanism for detecting the rotational position of a rotor, and by adopting the configuration of the present invention, an extra element is secondarily added. Without doing so, it is also possible to obtain a PG pulse once or several times per revolution.

Configuration of the Invention A DC non-commutator motor according to the present invention includes a three-phase stator winding,
A rotor provided with a permanent magnet having a plurality of magnetic poles facing the stator winding, a position detection element for detecting a rotation position of the rotor, and a rotation position of the rotor configured on the rotor. Accordingly, an annular discriminating band having first, second, and third constituent elements for causing the position detecting element to generate three kinds of outputs having different levels, and a driving means for supplying a current to the stator winding. A distributor for distributing the output of the position detecting element to the first, second, and third signal lines according to its level, and a ring-shaped distributor for sending a drive command signal to the driving means. A plurality of output sections, and the first, second and third signal lines are respectively connected to first, second and third input terminals,
A sequential circuit that changes the output state of the output section only when the first, second, and third signal lines are activated in a preset order; and an output of the sequential circuit when the rotor is started. It is characterized by comprising an initialization means for making the state dependent on the output state of the distributor, and in particular,
By supplying the sequential circuit with the position detection signals distributed to the first to third signal lines in accordance with the rotational position of the rotor, the smooth rotation of the rotor can be achieved using only one position detection element. It has a feature in that it can be started and rotated.

Description of Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram of a motor configured to carry out the present invention. Three-phase stator windings 1, 2, and 3 are star-connected to each other, and the stator winding 1 .. 3 to face the permanent magnets 4 mounted on a rotor (not shown).
Are arranged.

The main portion of the permanent magnet 4 is occupied by a main pole magnetized with 8 poles, and the inner peripheral portion thereof has a first component portion magnetized with N poles (indicated by an N symbol in the drawing). The second component part which is not magnetized (indicated by Z symbol in the figure) and the third component part which is magnetized by S pole (indicated by S symbol in the figure). Has the annular identification bands 5 arranged alternately in the circumferential direction.

In addition, a Hall IC prepared as a rotor rotational position detecting element facing the identification band 5 (an integrated circuit in which a Hall power generator and another circuit are made to coexist on a chip, generally called a Hall IC or a Hall switch). 6 are arranged.

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

Further, the lead wires of the stator windings 1, 2, and 3 are connected to a first power supply terminal U, a second power supply terminal V, and a third power supply terminal W, respectively, and a star-connected middle point is a terminal X. It is connected to the.

The Hall IC 6 has a positive side power supply terminal 6a, a negative side power supply terminal 6b, and an output terminal 6c, and the lead wire of the generator winding 7 is connected to the output terminals 7a and 7b.

Now, FIG. 2 is a block diagram of a DC non-commutator motor according to an embodiment of the present invention. In FIG. 2, block 10 is an internal connection of the motor block shown in FIG. It was done.

That is, in the motor block 10, a current limiting resistor 8 is connected between the midpoint terminal X and the positive side power supply terminal 6a of the Hall IC 6, and the negative side power supply terminal 6b of the Hall IC 6 and one output of the generator winding 7 are connected. The terminal 7b is commonly connected to the ground terminal G, the output terminal 6c of the Hall IC 6 is connected to the position detection terminal P, and the other output terminal 7a of the generator winding 7 is connected.
Is connected to the rotation detection terminal F.

A position detection signal whose level changes in three steps depending on the rotational position of the motor is output to the position detection terminal P by a processing circuit described later. This position detection signal is output by the distributor 100 as three signals. The lines are distributed to the lines 100n, 100s, 100z, further subjected to conditioning processing 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 supplied to the slope generation circuit 500 after being amplified to a sufficient amplitude by the amplifier 400, and at the A terminal as a speed detection signal for rotation servo of the motor. Supplied,
The signal appearing on the signal lines 100n and 100s is taken out once per revolution of the motor by the extraction circuit 600 and is also supplied to the B terminal as a position detection signal for rotation servo of the motor.

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

Now, the slope generation circuit 500 generates a sawtooth wave and a delay pulse which are synchronized with the output signal of the power generation winding 7 and supplies them to the drive signal generation circuit 300.

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

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

The J terminal is a terminal to which a command signal for stopping / rotating the motor is supplied. The command signal is supplied to the drive circuit 700 and also used as a signal for initialization in the sequential circuit.
Although it is supplied to the initialization terminal of 200, in the embodiment, when the J terminal is at the “L” level (low potential), the energization to the stator winding is stopped and the “H” level (high potential) is supplied. ), The stator winding is energized.

In the embodiment shown in FIG. 2, the distributor 100 for distributing the output signal of the three-valued level of the Hall IC 6 to the three signal lines 100n, 100s, 100z as the two-valued signal has two threshold voltages having different threshold voltages. Since it can be easily realized by a comparator and the amplifier 400 is also an AC amplifier, the description of the internal configuration will be omitted here, and a simple operation will be described with reference to actual circuit configuration examples of other circuit blocks.

First, FIG. 3 is a circuit connection diagram showing a specific configuration example of the Hall IC 6, which is formed on a silicon substrate with a constant voltage circuit section 61 using a well-known bandgap reference voltage source or the like. The Hall power generator 62 and other signal processing circuit parts.

When the Hall power generator 62 in FIG. 3 faces the N-pole magnetized portion of the identification band 5 shown in FIG. 1, the potential of one output terminal 62a of the Hall power generator 62 rises, The potential of the other output terminal 62b drops.

Therefore, the collector potential of the transistor 63 drops and the collector potential of the transistor 64 rises, so that most of the current flowing into the constant current transistor 65 is transferred to the transistor 66.
It becomes the collector current of.

In the circuit of FIG. 3, the constant current transistor
The resistance ratio of the resistor 67 connected to the emitter side of 65 and the resistor 69 connected to the emitter side of the constant current transistor 68 is 3
Since it is set to pair 4, the constant current transistor 65
The collector current of the constant current transistor 68 is about 3 · Io.

Further, a resistor 71 connected to the emitter side of the power receiving transistor 70 and a resistor 7 connected to the emitter sides of the constant current transistors 72 and 73, which form the positive side current mirror circuit.
Since the resistance values of 4 and 75 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 3 times the resistance value of the resistor 71, the constant current The maximum collector currents of the transistors 72 and 73 are approximately 3 · Io, and the constant current transistor 76
The collector current of is about Io.

Therefore, three quarters of the collector current of the transistor 66 is supplied from the constant current transistor 73 and only the remaining one quarter is supplied from the first collector 78a of the transistor 78.

At this time, the load resistor 79 connected to the output terminal 6c is supplied with the current of Io from the second collector 78b of the transistor 78 and the current of Io from the constant current transistor 76. When the resistance value of the resistor 79 is Ro, a potential of 2 · Ro appears at the output terminal 6c.

On the contrary, when the Hall power generator 62 faces the S-polarized portion of the identification band 5, most of the current flowing into the constant current transistor 65 becomes the collector current of the transistor 80, and the transistor 81. First collector 81a
And a current Io also flows through the second collector 81b,
The current of the second collector 81b is supplied to the current mirror circuit formed by the transistors 82 and 83.

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

On the other hand, when the Hall power generator 62 faces the non-magnetized portion of the identification band 5, the collector currents of the transistors 66 and 80 are almost balanced, so the transistors 66 and 80 are balanced.
All of the collector current of the constant current transistor 72,
The collector currents of the transistors 78 and 81 supplied from 73 become zero, and only the collector current of the constant current transistor 76 is supplied to the load resistor 79 to output the output terminal 6c.
The potential of is Io · Ro.

In this way, the output voltage of the Hall IC 6 changes in three steps 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 commutatorless motor constructed as shown in FIGS. 1 and 2 and the change in the position detection signal obtained from the Hall IC 6. When the relative rotation angle between the identification band 5 provided on the rotor and the Hall IC 6 arranged on the stator changes as shown in FIG. 4 mechanical angle or electrical angle, it corresponds to it. The output voltage of the Hall IC 6 changes as shown in FIG.

Next, FIG. 5 shows an example of a flow chart when the sequential circuit 200 shown in FIG. 2 is realized by software such as a microcomputer.
2, it is determined whether or not the signal line 100n in FIG. 2 is in an active state, that is, whether the Hall IC 6 faces the magnetized portion of the identification band 5 having the N pole, and if yes, the processing block 20
If the process is transferred to 2, it is determined in the branch 203 whether or not the Hall IC 6 faces the S-polarized portion of the identification band 5, and if yes, the process is performed in the processing block 204. If not, the process proceeds to processing block 205.

In the processing block 202, of the three systems of signals supplied to the drive signal generating circuit 300 of FIG. 2, only one corresponding to the N pole portion is activated, but this is three in the microcomputer. This corresponds to activating only one of the output ports.

When the processing in the processing block 202 is completed, the processing proceeds to the branch 206, where it is determined whether or not the signal line 100s of FIG. 2 is active as in the branch 203, and if yes, the processing is performed. Moving the processing to block 204,
If not, the determination by the branch 206 is executed again.

In the processing block 204, the drive signal generation circuit 3
Of the three systems of signals supplied to 00, only one corresponding to the S pole portion is activated, and when this processing ends, the processing moves to the branch 207.

In the branch 207, it is determined whether or not the signal line 100z shown in FIG. 2 is in the active state. If yes, the process is moved to the process block 205.
Judgment by 07 is executed.

In the processing block 205, the drive signal generation circuit 3
Of the three systems of signals supplied to 00, only one corresponding to the non-magnetized portion is activated, and when this processing ends, the processing proceeds to branch 208.

In the branch 208, it is determined whether or not the signal line 100s shown in FIG.
If yes, the process moves to the process block 202, but if no, the determination by the branch 208 is executed again.

In this way, immediately after the start, the signal line 100n, 100n is generated by the branch 201 or the branch 203.
s, the output corresponding to the signal line in the active state of 100z is supplied to the drive signal generation circuit 300, after that, the processing block 202, the branch 206, the processing block 204, the branch 207, the processing block 205, because it enters into the loop constituted by the branch 208, the drive signal generation circuit 300 only when the signal lines 100n, 100s, 100z are activated in this order.
The state of the output supplied to is changed.

That is, the sequential circuit shown in FIG. 5 is connected to each other in a ring shape to output three drive command signals to the drive signal generation circuit 300, that is, the processing blocks 202, 204, 205. The signal line 100n, 100s, 100
Of z, it is a sequential circuit that changes the output state of the output section only when a pre-ordered signal line is in an active state, and is further configured by the branches 201 and 203, and is of a rotor of a motor. It also includes an initialization circuit that makes the output state of the sequential circuit dependent upon the output state of the distributor 100 to the signal lines 100n, 100s, 100z at startup.

Now, FIG. 6 shows an example in which the sequential circuit 200 of FIG. 2 is configured by hardware, and its basic operation is as shown in FIG.
It is the same as the flowchart in the figure.

In FIG. 6, the respective first input terminals 211a, 21a
2a and the output terminal are cross-coupled to each other to form NAND gates (positive logic NAND gates) 211 and 212, and the output terminal is the second of the NAND gates 211.
A second logic block 220 having NAND gates 221, 222, 223 having the same configuration, and a first logic block 210 having NAND gates 213, 221 and 232 having the same configuration. , 233 form a unit unit by the third logic block 230, and the NAND
The output of the NAND gate 232 is supplied to the second input terminal 212b of the gate 212 and the first input terminal 213a of the NAND gate 213, and the output of the NAND gate 232 is supplied to the second input terminal 222b of the NAND gate 222 and the N input.
The NAND gate 21 is connected to the first input terminal 223a of the AND gate 223.
The output of the NAND gate 222 is supplied to the second input terminal 232b of the NAND gate 232 and the first input terminal 233a of the NAND gate 233 to form a sequential circuit.

The second input terminal 2 of the NAND gates 213, 223, 233
13b, 223b and 233b are the signal lines 100s and 1 of FIG. 2, respectively.
Output terminals s2, n2, z2 connected to input terminals s1, n1, z1 connected to 00n, 100z for supplying a drive command signal to the drive signal generation circuit 300 of FIG. 2 are respectively the NAND gate 211, It is connected to the output terminals of 221 and 231.

Further, the third input terminals 212c, 222c, 232c of the NAND gates 212, 222, 232 are all connected to the initialization terminal j1 connected to the J terminal in FIG.

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

First, the signal waveform of FIG. 4 a) shows the output signal of the Hall IC 6 of FIG. 2 as already described.
The signal waveforms of FIGS. B), c), and d) are based on the output signal of the Hall IC 6 and are distributed to the signal lines 100n, 100s, 1 by the distributor 100.
It is a signal waveform that appears on each signal line after being distributed to 00z.

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

A high potential state is represented by'H 'and a low potential state is represented by'L'.

Now, when the motor rotation is stopped or immediately after the power is turned on, the level of the initialization terminal j1 in FIG. 6 is'L ', and the output levels of the NAND gates 212, 222, 232 are forced. The output terminals n2, s2, and z2 have the same level as the input terminals n1, s1, and z1 because they are held at “H”.

Assuming that the Hall IC 6 of FIG. 2 faces the position where the electrical angle of FIG. 4 is 0 °, the level of the output terminal z2 becomes “H” and the level of the output terminals n2 and s2. Becomes'L ', but this state continues even after the level of the initialization terminal j1 shifts to'H', the rotor of the motor starts rotating, and the Hall IC6 contacts the N pole of the identification band 5. When facing the magnetized portion, the level of the input terminal z1 shifts to'L ', and instead, the level of the input terminal n1 shifts to'H'.

When the level of the input terminal n1 shifts to'H ', the output level of the NAND gate 212 becomes'H' before that, so N
The output level of the AND gate 223 shifts to'L ', and the NAND gate
Inverting the output state of the gate pair by 221 and NAND gate 222, the output level of the NAND gate 221 becomes'H ',
The output level of the NAND gate 222 becomes'L '.

When the output level of the NAND gate 222 shifts to'L ', the output state of the gate pair of the NAND gate 231 and the NAND gate 232 is inverted, and as a result, the level of the output terminal n2 shifts to'H' and is active. Then, the level of the output terminal z2 shifts to'L 'and becomes inactive together with the output terminal s2.

When the rotor further rotates and the Hall IC 6 approaches the position of electrical angle 180 ° in FIG. 4, the level of the input terminal z1 shifts to'H 'again as shown in FIG. 4d). At this time, since the output level of the NAND gate 222 has shifted to'L ', no change occurs in the third logic block 230, and the output states of the output terminals n2, s2, z2 also do not change.

Then, when the level of the input terminal s1 shifts to'H ', the output level of the NAND gate 232 shifts to'H' before that, so the output level of the NAND gate 213 shifts to'L '. The output state of the gate pair by the gate 211 and the NAND gate 212 is inverted, 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 on the output only when the input terminals are activated as ordered.

In this way, when the position detection signals as shown in b), c), d) of FIG. 4 are supplied to the input terminals n1, s1, z1 of FIG. 6, the output terminals n2, s2, z2 are A drive command signal as shown in FIG. 4, e), f), and g) is output.

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

For example, in the vicinity of the electrical angle of 540 ° of the identification band in FIG. 4, the pattern is magnetized in a pattern different from the other parts, but this peculiar pattern is output to the sequential circuit while the rotor of the motor is rotating. Since it has no influence, it can be positively used for other purposes as described later.

By the way, comparing the signal waveforms of FIG. 4c) and the signal waveforms of FIG. 4f), it can be seen that they are exactly the same.

This means that if the use of the sequential circuit is limited to the magnetized discrimination band as shown in FIG. 4, the detection signal supplied to the input terminal s1 in FIG. 6 is directly output as the output signal s2.
It means that there is no problem in communicating to.

FIG. 7 shows a sequential circuit simplified in consideration of these points. In FIG. 7, the NAND of FIG.
An inverter 214 is used instead of the gate 213, and an inverter 234 is used instead of the gate pair of the NAND gate 231 and the NAND gate 232, but the operation is almost the same as the sequential circuit of FIG. Is omitted.

Next, FIG. 8 shows a specific circuit configuration example of the slope generation circuit 500 of FIG. 2, in which the output signal of the amplifier 400 of FIG. Is amplified until becomes a square wave.

At the leading edge of the output signal of the amplifier 501, the first trigger pulse generation circuit composed of NAND gates 502, 503, 504 generates a trigger pulse, and at the trailing edge, the inverter 505, the NAND gate 506,
A second trigger pulse generation circuit composed of 507 and 508 generates a trigger pulse.

On the other hand, NAND gates 509, 510, inverter 511, transistor
512,513,514,515,516,517, diode 518, resistor 519,520,
521, 522, 523, 524, and the capacitor 525 constitute a monostable multivibrator, and the output signals of the first and second trigger pulse generation circuits serve as the trigger signal of this monostable multivibrator.

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. 9d) is supplied to the input terminal f1, the signal waveforms appearing at the output terminals g1 and h1 are as shown in FIGS. 9e) and f), respectively.

The signal waveforms of a), b), and c) in FIG. 9 represent drive command signals supplied to the input terminals n3, s3, and z3 of the drive signal generation circuit 300 described below.

Now, before entering a detailed description of the drive signal generating circuit 300 of FIG. 2, a description will be given of the operation of switching the energization state to the stator winding of the DC non-rectifier motor shown in FIGS. 1 and 2. To do.

As is apparent from FIGS. 1 and 2, in the DC non-commutator motor described as the embodiment of the present invention, the stationary position of the rotor is detected by an annular ring having three types of constituent elements. Since only the identification band 5 and the unique Hall IC 6 are provided, only three types of identification are possible depending on the stationary position of the rotor.

However, as is well known, in order to take the form of three-phase full-wave drive, six types of position detection information are required according to the stationary position of the rotor.

In the DC non-commutator motor shown in Fig. 2, current is supplied to all three-phase stator windings 1, 2 and 3 based on the output signal of Hall IC6 until the motor speed increases to some extent. By doing so, an extra current is supplied to prevent the flow torque from decreasing, and after the rotation speed of the motor increases and a sufficient signal is obtained from the power generation winding 7, the output signal of the power generation winding 7 and the hall The drive signal generating circuit 300 is configured to generate an energization switching signal for three-phase full-wave driving based on the output signal of the IC6.

The principle of switching the driving mode will be described with reference to FIG.

FIG. 10 a) shows each stator winding 1, 2, when the main magnetic pole of the permanent magnet 4 is sinusoidal magnetized in the motor structure of FIG.
3 shows the torque characteristics generated when an electric current is applied, and the counterclockwise rotation torque is in the positive direction.

In FIG. 10 a), the characteristic curve ua represents the torque generated when a current is applied to the stator winding 1 of FIG. 1 in the direction from the U terminal to the X terminal, and the characteristic curve ub is the stator winding. The line 1 represents the torque generated when a current is applied from the X terminal to the U terminal.

The characteristic curve va represents the torque generated when the stator winding 2 shown in FIG. 1 is energized from the V terminal in the direction of the X terminal, and the characteristic curve vb represents the stator winding 2 at the X terminal. Represents the torque generated when electricity is applied in the direction from the to the v terminal.

Further, the characteristic curve wa represents the torque generated when the stator winding 3 shown in FIG. 1 is energized from the W terminal in the direction of the X terminal, and the characteristic curve wb shows the stator winding 3 at the X terminal. Represents the torque generated when electricity is applied in the direction from the W terminal to the W terminal.

On the other hand, Fig. 10 (c) shows the torque generated in the positive direction when current is applied to any two phases of the three-phase stator windings star-connected.
As shown in Fig. A), the ratio of torque generated in each stator winding is shown. As is well known, in a three-phase full-wave drive motor, the envelope of these curves is the actual output torque waveform. Becomes

That is, in FIG. 10c), the characteristic curve wv represents the torque generated when a current is passed from the W terminal to the V terminal direction in FIG. 1, and the characteristic curve uv is from the U terminal to the V terminal direction. The characteristic curve uw represents the torque generated when electricity is applied, and the characteristic curve uw represents the torque generated when electricity is applied from the U terminal in the W terminal direction.
Represents the torque generated when the V terminal is energized in the W terminal direction, and the characteristic curve vu represents the torque generated when the V terminal is energized in the U terminal direction. Represents the torque generated when electricity is applied from the W terminal to the U terminal.

Assuming that the maximum torque generated by each stator winding is 1, in the three-phase full-wave drive, energization switching to the angular stator winding is performed at every 60 ° electrical angle. Tma ₁ , minimum torque Tmi ₁ , and average torque Tav ₁ are given by the following equations. (Here, all torques are made unitless and are simply expressed as exponents.) FIG. 10d) shows the output signal waveform of the Hall IC 6 already described, and FIG. 10e) shows the slope generation circuit 50.
0 shows the output signal waveform of the amplifier circuit 501 used inside 0, but when the rotor of the motor is stopped, only the output signal of the Hall IC 6 is used as position detection information. I can't.

In order to start the motor using only three types of position detection information, it is conceivable to take the form of three-phase half-wave drive. In that case, in the stator winding in the star connection shown in Fig. 2, A power switching element is required to directly connect the X terminal, which is a point, to the positive or negative power supply line.

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

That is, in correspondence with the three-step level changes of the output signal of the Hall IC 6, the section where the output signal is at a high potential is the first energization section, the section where the output signal is at a low potential is the second energization section,
A section having an intermediate potential is defined as a third energization section, and in the first energization section, the U terminal to the V terminal and the W terminal in FIG. 2 are connected.
The terminal is energized, the V terminal is energized to the W terminal and the U terminal in the second energization section, and the W terminal is connected to the U terminal and the V terminal in the third energization section. Energize the terminals.

At this time, the combined torque characteristics of the three-phase stator windings 1, 2, and 3 are as shown in FIG. 10 b), and the characteristic curve uc represents the torque generated by energization in the first section. A curve vc represents the torque generated by energization in the second section, and a characteristic curve wc represents the torque generated by energization in the third section.

Therefore, the output torque of the motor when the energization is switched at the ideal timing is equal to the envelope of the characteristic curve in Fig. 10 b), and the main winding of the three-phase stator winding is the other winding. Considering that a current equal to the sum of the two-phase stator winding currents flows, the maximum torque Tma ₂ and the minimum torque T
Obtaining mi ₂ and average torque Tav ₂ is as follows.

As is clear by comparing the equations (3) and (6),
The same average torque as in three-phase full-wave drive can be obtained at the time of start-up, and the start-up current can be saved as compared with the case where three-phase half-wave drive is performed by adding an extra power switching element. .

By the way, in any of the driving methods, assuming that the resistance value per one phase of each stator winding is the same, the starting current in the three-phase half-wave drive is double that in the three-phase full-wave drive. The drive method just described increases the start-up current by only about 33 percent.

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 becomes maximum when the motor is started.

FIG. 11 is a circuit connection diagram showing a specific configuration example of the drive signal generating circuit 300. 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. Is.

The input terminals f3, g2, h2 are respectively connected to the output terminals f2, g1, h1 of the slope generation circuit 500 shown in FIG. 8 to supply the signal waveforms shown in FIG. 9 d), e), f). Input terminal
The position detection signals shown in a), b), and c) of FIG. 9 are supplied to n3, s3, and z3, respectively.

An outline of the operation will be described based on the signal waveform diagram of FIG.
The highest voltage is supplied to the E terminal when the motor is started, and the comparator composed of the transistors 301, 302, 303, 304 and the constant current transistor 305 operates,
The transistor 306 is turned on.

When the transistor 306 is in the on state, the first current mirror circuit formed by the transistors 307, 308, 309, 310, 311, 312, 313, 314, 315 is not supplied with power, so that the second current mirror circuit formed by the transistors 316, 317 is also cut off and the transistors 318, 319, 320, 321, 3212, 323, 324, 325, 326 are used. The constructed third current mirror circuit is also turned off.

On the other hand, since one end of the resistor 327 is connected to the positive side power supply line 300a by the transistor 306, the transistors 328, 329, 330, 331, 332, 333 are all in the power supply waiting state, and the base current flows to turn on.

Now, assuming that the level of the input terminal n3 is'H ', the input terminal is
If the level of s3, z3 is'L ', the transistor 33
4,335,336 are turned on, and as a result, the transistors 328,329,332 are turned on and output terminals up1, wn1, v
The current can be supplied from n1.

When the level of the input terminal s3 is'H ',
If the level of z3, n3 is'L ', then transistors 337,3
38,339 is turned on, current can be supplied from the output terminals vp1, wn1, un1, and the level of the input terminal z3 is'H 'and the level of the input terminals u3, v3 is'L'. For example, the transistors 340, 341, 342 are turned on, and the current can be supplied from the output terminals wp1, up1, vn1.

FIG. 12 is a circuit connection diagram showing a specific configuration example of the drive circuit 700 in FIG. 2, which shows input terminals un2, vn2, wn2, up2, vp2, wp.
2 are connected to the output terminals un1, vn1, wn1, up1, vp1, wp1 of the drive signal generating circuit 300 shown in FIG. 11, respectively.

Therefore, the initialization terminal j2 connected to the J terminal in FIG.
When the current is supplied from the up2 terminal, vn2 terminal, and wn2 terminal under the level of'H ', the transistor 70
Assuming that 1,702,703 become conductive and the stator windings 1,2,3 which are star-connected as shown in Fig. 2 are connected to the output terminals U, V, W, And electricity is applied in the direction of the W terminal.

Similarly, when currents are supplied from the vp2 terminal, the wn2 terminal, and the un2 terminal, the transistors 704 and 705 and the transistor 703 are brought into conduction, and the V terminal is energized in the direction of the W terminal and the U terminal. wp2 terminal, un2
When a current is supplied from the terminal, vn2 terminal, the transistor 706 and the transistors 702, 705 become conductive, and the current is supplied from the W terminal to the U terminal and the V terminal. In this way, as is apparent from the output torque characteristic of FIG. 10b), the motor starts to rotate, but when the rotation speed of the motor increases to some extent and the potential of the E terminal in FIG. 11 decreases. The transistor 306 turns off,
The collector current of the transistor 345, which forms a differential amplifier circuit together with the transistor 343 and the constant current transistor 344, flows through the collector-emitter of the transistor 308, and all of the transistors 309 to 315 are activated. A current is also supplied to the transistor 316 forming the second current mirror circuit via the transistor 309. The transistors 309 to 315
Output current varies 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 gates (AND
Means a logical product of positive logic, and OR means a logical sum of positive logic. ) The waveform processing circuit achieved by 352, 353 and 354 is supplied with the position detection signal shown in FIGS. 9 a), b) and c) and the rotation detection signal shown in FIG. 9 d) and further via the inverter 355. The signal shown in FIG. 9f) is supplied as a clock signal for the D flip-flops 346 to 351.

Therefore, at the output terminals of the D flip-flops 346, 348 and 350, the signal waveforms shown in FIG. 9 g), h) and i) appear,
Further, the signal waveforms shown in j), k) and l) of FIG. 9 appear at the output terminals of the D flip-flops 347, 349 and 351.

The transistor 356 is turned off while the output of the D flip-flop 346 is at the "H" level, and the transistor 357 is turned off while the output of the D flip-flop 347 is at the "H" level.

Similarly, while the outputs of the D flip-flops 348, 349, 350, 351 are at the “H” level, the transistor 35 is
8,359,360,361 are turned off.

On the other hand, the signal waveform shown in FIG. 9e) is supplied to the slope current generating transistor 362 via the input terminal g2,
A constant current is supplied from the constant current transistor 364 to the resistor 363 on the emitter side of the transistor 362, and a current dependent on the output current of the transistor 309 flows into the transistor 317. The collector current of 362 has a peak value depending on the collector current of the transistor 345 which constitutes the differential amplifier circuit, and its slope becomes a sawtooth wave equal to the slope of the signal waveform of FIG. 9e).

The collector current of the transistor 362 is supplied to the third current mirror circuit formed by the transistors 318 to 326, and the same current is supplied via the transistor 320 to the transistors 365, 366, 367, 368, 369, 370, 371, 37.
It is supplied to the fourth current mirror circuit constituted by 2.

The output current of the constant current transistor 364 and the resistance value of the resistor 363 are set to appropriate values, or the resistance value of the emitter side resistance of each current mirror circuit is adjusted to adjust the first current mirror. The maximum output currents of the transistors 310 to 315 forming the circuit, the maximum output currents of the transistors 321 to 326 forming the third current mirror circuit, and the maximum output currents of the transistors 367 to 372 forming the fourth current mirror circuit. The currents can be equal and the magnitudes of these maximum output currents all depend on the error voltage supplied to the E terminal.

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, the output of the AND gate 373 becomes the "H" level in the section P1 of FIG. The 374 is turned off, and the sawtooth current is supplied to the output terminal wn1 via the transistor 322.

Then, the output level of the D flip-flop 346 is'H '.
Then, since the transistor 356 is turned off, a current is supplied to the output terminal through the transistor 311 this time, but the output of the D flip-flop 346 and the output of the D flip-flop 347 are both “H”. 'When the level is reached, that is, in the section P2 in Fig. 9, AN
Since the output of the D gate 375 becomes the “H” 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 wn1 gradually decreases, and eventually the waveform of the current supplied to the output terminal wn1 becomes as shown in FIG. 9 (m).

For the current waveform supplied to the other output terminals, the AND
The same operation is performed by the gates 373, 375 and other AND gates 377, 378, 379, 380, so that the output terminal un1,
Current waveforms supplied to vn1, vp1, wp1, up1 are shown in Fig. 9 n),
o), p), g), r).

The waveforms shown by broken lines in FIGS. 9 m to r) are current waveforms when the rotation speed of the motor increases and the potential of the E terminal decreases.

The six kinds of current signals generated in the drive signal generation circuit of FIG. 11 in this way are supplied to the drive circuit of FIG. 12 and current-amplified, and then the stator winding 1, Power is supplied to a few.

By the way, assuming that the transistor 701 of FIG. 12 is formed as an assembly of a large number of small signal transistors on the IC substrate, and the transistor 707 is assigned to one of them, the transistor 701 and the transistor 707 are a current mirror circuit. The current of 1 / K of the collector current of the transistor 701 becomes the collector current of the transistor 707.

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

That is, the emitter junction area of the transistor 701 is S
x, emitter junction area Ix, the emitter junction area of the transistor 707 is Sy, the emitter current is Iy, the resistance value of the resistor 708 is Re, the electron charge is q, the Boltzmann constant is k, and the absolute temperature of the junction is When T is set, the following relational expression holds.

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

Therefore, when the input current is I ₁ , the collector current of the transistor 701 is I ₂ , the resistance value of the resistor 710 is R ₁ , and the resistance value of the resistor 709 is R ₂ , the current amplification factor GI in this part is It is given by

In the above description, the current amplification factor of the power supply block having the transistor 701 as the output section is substantially constant (in other words,
It is not affected by variations in the DC current amplification factor of each transistor. ), But the other five feeding blocks are configured based on the same operating principle, and thus operate similarly.

By the way, the level of the initialization terminal j2 in Fig. 12 is'L 'immediately before the motor is stopped or started.
711 is on and transistors 712,713,714,715,7
Both the current mirror circuit formed by 16,717 and the current mirror circuit formed by the transistors 718, 719, 720, 721, 722 are in the cutoff state, and the base current is not supplied to the transistors 701, 702, 703, 704, 705.

However, since the base current is supplied only to the transistor 706 through the transistor 723,
The 706 is turned on.

However, since all of the transistors 702, 703, and 705 are in the off state, a current for generating a rotational force does not flow through the stator windings 1, 2, and 3 in FIG. The current required to detect the stationary position of the rotor is supplied to the Hall IC 6.

At the time of starting the motor, 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 based on the position detection information at the time of stop. The Hall IC 6 is continuously energized in the energized form, and the current required for detecting the rotational position is continuously supplied to the Hall IC 6.

Even if the power supply to the Hall IC 6 is temporarily cut off at the time of starting the motor due to the influence of the inductance of the stator windings 1 to 3, the position detection signal is a logic circuit using a flip-flop (for example, as shown in FIG. 6). Since it is supplied to the drive signal generation circuit via the circuit (shown), 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 the input terminals n4 and s4 are connected to the signal lines 100n and 100s of FIG. 2, respectively. 14 Figure a),
The position detection signal shown in b) is supplied.

The signals supplied to the input terminal s4 are NAND gate 601 and NAN.
A first flip-flop by the D gate 602, a second flip-flop by the NAND gate 603 and the NAND gate 604,
Further, it is used as a reset signal of the third flip-flop by the NAND gate 605 and the NAND gate 606, and the signal supplied to the input terminal n4 is used as the output update signal of the first to third flip-flops.

Therefore, in the configuration of FIG. 13, an output signal appears at the output terminal B when the level of the n4 terminal changes three times while the level of the input terminal s4 is'L '.

14 c), d), and e) are the NAND gates 601, 60 in FIG. 13, respectively.
The output signal waveforms of 603 and 605 are shown. In this way, an absolute position detection signal is obtained from the output terminal B once per one rotation of the rotor.

Now, returning to FIG. 2, the outline of the operation described so far is summarized as follows.

First, when the rotor is stopped, the U terminal,
Only the W terminal of the V terminal and the W terminal is at a high potential, and current is supplied to the Hall IC 6 through the stator winding 3 and the current limiting resistor 8 to detect the stationary position of the rotor.
The Hall IC 6 generates an output of high potential, intermediate potential, or low potential depending on the stationary position.

In the embodiment, in order to minimize the number of connecting lines between the motor block 10 and other circuit blocks, the Hall IC
6 is fed from the midpoint of the 3-phase stator winding, and its output is sent as a ternary signal. The Hall IC is fed from a separately provided feeding terminal, and the number of output terminals is Increasing the number to two or three does not depart from the object of the present invention.

One of the signal lines 100n, 100s, 100z is activated by the distributor 100 according to the output level of the Hall IC 6,
This position detection information is supplied to the drive signal generation circuit 300 via the sequential circuit 200, but the sequential circuit 200 operates as a simple buffer until the rotor starts rotating.

Based on the position detection information supplied to the drive signal generation circuit 300, the drive signal generation circuit 300 and the drive circuit 700 set any one of the U terminal, the V terminal, and the W terminal to the'H 'level, and leave the rest. To'L 'level to generate a rotating torque in the rotor.

At this time, the Hall IC6 was accidentally stopped at the position where the rotating electrical angle in FIG. 10 was 60 °, that is, at the boundary between the N pole and the S pole of the identification zone 5, or at the position where the rotating electrical angle was 390 °. Then, in any 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 the information, Ten
As can be seen from the characteristic curve of FIG. B), the rotor will generate rotational torque in the opposite direction.

However, regular position detection information is obtained by moving the rotor only slightly, and thereafter, the order circuit 200 regulates the order in which the position detection signals are received, so that smooth rotation can be maintained.

When the rotation speed of the rotor rises to a certain degree, the potential of the E terminal in FIG. 2 decreases, and the drive signal generation circuit 300 switches the energization form to the stator windings 1 to 3 to the three-phase full-wave drive. The rotational torque characteristic of the child becomes like the envelope of the characteristic curve shown in FIG.

Further, in the embodiment, since the energization switching to the stator windings 1 to 3 is performed slowly by using the sawtooth wave generated by the slope generation circuit 500, the stator is switched by the abrupt energization switching. It is possible to prevent the winding and stator frame from behaving like a speaker and generating noise during rotation, and spike noise in the stator winding may cause electrical noise or surge voltage may cause IC It can also be prevented from being destroyed.

As described above, the slope generating circuit 500 is extremely useful when this type of DC non-rectifier motor is used in electronic equipment, but it is out of the scope of the present invention even if it is deleted to simplify the system. Not a thing.

In the embodiment of the present invention, the identification band 5 is composed of the N-pole magnetized portion, the S-pole magnetized portion, and the non-magnetized portion.
Although it has two constituent elements, in constructing the non-magnetized portion, the N pole portion and the S pole portion are arranged in parallel in the circumferential direction in the region, and the scanning trajectory of the position detecting element is in that region. You may comprise so that it may correspond to the boundary line of the N-pole magnetized part and the S-pole magnetized part.

Further, as the position detecting element, the Hall IC 6 shown in the embodiment is used.
Not only can general hall power generating elements, light receiving elements, and magnetoelectric conversion elements be used, but the Hall IC reduces the number of connecting wires between the motor block 10 and other circuit block portions. It will be easier.

When a light receiving element is used as the position detecting element, an identification band including three types of constituent elements (regions) having different light transmittances or light reflectances is required, which causes variations in sensitivity of the light receiving element and light emitting element. It is also necessary to pay sufficient attention to the variation in the emission intensity of.

As is apparent from the above description, the DC non-commutator motor of the present invention has three-phase stator windings 1 to 3 and a permanent magnet 4 having a plurality of magnetic poles facing the stator windings. A rotor provided with, a position detection element for detecting the rotation position of the rotor (Hall IC6 in the embodiment), the position detection element according to the rotation position of the rotor configured on the rotor An annular identification band 5 having first, second and third components that generate three different levels of output, and drive means for supplying a current to the stator winding (in the embodiment, drive) The driving means is composed of the signal generating circuit 300 and the driving circuit 700, but the driving signal generating circuit 300 is necessary for switching the energization mode to the stator winding, and this is deleted. Even if it does, it does not depart from the gist of the present invention. No.), The first signal line 100n in accordance with the output of the position detecting device at that level, the second signal line 1
00s, which has a distributor 100 for distributing to the third signal line 100z, and three output units which are connected to each other in a ring shape and which sends a drive command signal to the drive means. The first input terminal n1, the second input terminal s1, and the third input terminal z1 are connected to the third signal line, respectively, and the first, second, and third signal lines are activated in a preset order. The sequential circuit 200 that changes the output state of the output section only when
And initializing means (initializing terminal) for making the output state of the sequential circuit dependent on the output state of the distributor when the rotor is activated. The output of the position detecting element, whose output changes in three ways, is supplied to the drive means after the output of the position detecting element is conditioned by the sequential circuit, but only a very simple position detecting mechanism is provided. In this way, smooth start-up and rotation can be performed, and further, a part of the first component area of the identification band can have a second width with a narrow width.
(The first component corresponds to a portion magnetized to the N pole and the second component corresponds to a non-magnetized portion in the embodiment. Can be set arbitrarily.), By including an extraction circuit 600 for extracting an output change of the position detection element in the second component part and outputting it as an absolute position detection signal of the rotor, It is possible to obtain PG pulse once per rotation or several times without adding elements, etc.,
It has an extremely large effect.

In the detailed embodiment shown in FIG. 7, the first and second logic gates whose first input terminal and output terminal are cross-coupled to each other (NAND in the embodiment The gate 211 and the NAND gate 212 are used, but if the input / output logic is changed from positive logic to negative logic,
Since these immediately replace NOR gates, they are not limited to NAND gates, and other logic gates can be used. ), Each of the first input terminal and the output terminal is the third and fourth with their respective cross-coupling connections
Logic gates and (in the exemplary embodiment, NAND gates 221 and 22
3), a fifth logic gate whose output terminal is connected to the second input terminal of the third logic gate (in the embodiment,
NAND gate 223), and a sixth logic gate (NAND gate 233 in the embodiment) having a first input terminal to which the output of the gate pair of the third and fourth logic gates is supplied,
The second input terminal of the fourth logic gate and the first input terminal of the fifth logic gate respectively supply the output of the gate pair by the first and second logic gates, and the first logic gate To the second input terminal of the fifth logic gate, and the second input terminal of the sixth logic gate to the first signal line, the second signal line, and the third signal line, respectively. Of the second to fourth logic gates, and an initialization signal to the third input terminal of each of the second and fourth logic gates. It constitutes the circuit. Further, in the detailed embodiment shown in FIG. 6, each first input terminal and each output terminal are cross-coupled to each other.
1, a second logic gate and (in the embodiment, a NAND gate 21
1 and a 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 respective first input terminals. The fourth and fifth logic gates whose output terminals are cross-coupled to each other (NAND gate 221 and NAND gate 222 in the embodiment) and the second input terminal of the fourth logic gate at the output terminal A sixth logic gate connected to each other (NAND gate 223 in the embodiment) and seventh and eighth logic gates each having a first input terminal and an output terminal cross-coupled to each other (embodiment) In
NAND gate 231 and NAND gate 232), the 7th output terminal
A ninth logic gate (NAND gate 233 in the embodiment) to which the second input terminal of the logic gate is connected.
The second input terminal of the second logic gate and the first input terminal of the third logic gate are supplied with the outputs of the gate pair by the seventh and eighth logic gates, respectively, and the fifth logic The output of the gate pair of the first and second logic gates is supplied to the second input terminal of the gate and the first input terminal of the sixth logic gate, and the second input terminal of the eighth logic gate is The output of the gate pair by the fourth and fifth logic gates is supplied to an input terminal and a first input terminal of the ninth logic gate, respectively, and a second input terminal of the third logic gate, 6, the second input terminal of the logic gate 6 and the second input terminal of the ninth logic gate are supplied with the detection signals appearing on the first signal line, the second signal line and the third signal line, respectively. Initialized to the third input terminal of each of the second, fifth, and eighth logic gates To supply a signal,
A sequential circuit is composed of the first to ninth logic gates.

Therefore, it is not necessary to add an extra individual component when the device is made into an IC, and the output states of the first to third signal lines are held by at least two sets of logic gates, Even if the position detection information is temporarily interrupted at the time of starting the rotor, accurate information can be transmitted to the drive means, which is a great effect.

[Brief description of drawings]

FIG. 1 is a schematic diagram of a motor portion configured to carry out the present invention, FIG. 2 is a block configuration diagram of a DC non-rectifier motor in one embodiment of the present invention, and FIG. 3 is an internal circuit of a Hall IC. Wiring diagram, FIG. 4 is a signal waveform diagram corresponding to the magnetization pattern of the identification band for explaining the processing operation of the position detection signal, FIG. 5 is a flow chart when the sequential circuit is realized by software, and FIG. 7 and 7 are circuit connection diagrams showing a configuration example of a sequential circuit, FIG. 8 is a circuit connection diagram showing a configuration example of a slope generation circuit, and FIG. 9 is a signal waveform for explaining a position detection signal processing operation. Fig. 10 is a torque characteristic diagram for explaining motor torque characteristics and energization switching.
Figure 11 is a circuit connection diagram showing a concrete example of the drive signal generation circuit.
FIG. 12 is a circuit connection diagram showing a specific example of the drive circuit, FIG. 13 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. 1,2,3 …… stator winding, 4 …… permanent magnet, 5 …… identification band, 6…
… Hall IC, 100… Distributor, 200… Sequential circuit, 600… Extraction circuit, 700… Drive circuit.

Claims (6)

[Claims] 1. A rotor provided with a three-phase stator winding, and a permanent magnet having a plurality of magnetic poles facing the stator winding,
A position detecting element that detects a rotational position of the rotor, and first and second elements that are formed on the rotor and that cause the position detecting element to output three different levels according to the rotational position of the rotor. An annular discriminating band having a third component, a driving means for supplying a current to the stator winding, and outputs of the position detecting element depending on the levels of the first, second, third
And a distributor for distributing the signal lines to the signal lines, and three output units connected to each other in a ring shape to send a drive command signal to the driving means, and to the first, second, and third signal lines. The output states of the output section are changed only when the first, second and third input terminals are connected and the first, second and third signal lines are activated in a preset order. A direct current non-commutator motor comprising a sequential circuit to be changed and an initialization means for making the output state of the sequential circuit dependent on the output state of the distributor when the rotor is activated. 2. A first and a second logic gate whose respective first input terminals and output terminals are cross-coupled with each other, and respective first input terminals and output terminals are cross-coupled with each other. Connected third and fourth logic gates, a fifth logic gate whose output terminal is connected to the second input terminal of the third logic gate, and a first input terminal which is connected to the third and fourth logic gates. A fourth logic gate supplied with the output of the gate pair of four logic gates, wherein the fourth logic gate, the second input terminal, and the first input terminal of the fifth logic gate are respectively connected to the sixth logic gate. Supplying the output of the gate pair by the first and second logic gates, the second input terminal of the first logic gate, the second input terminal of the fifth logic gate, and the sixth logic gate. The first signal line and the second signal are respectively connected to the second input terminals of the gate. The detection signal appearing on the line and the third signal line is supplied, and the initialization signal is supplied to the third input terminal of each of the second and fourth logic gates. The DC non-commutator motor according to claim 1, wherein a sequential circuit is constituted by logic gates. 3. A first and a second logic gate whose respective first input terminal and output terminal are cross-coupled to each other, and an output terminal having a second input terminal of the first logic gate. A connected third logic gate and a respective first
4th and 5th logic gates whose input terminals and output terminals are cross-coupled to each other, and said 4th and 5th logic gates are connected to the output terminals.
A sixth logic gate to which the second input terminal of the logic gate is connected, and seventh and eighth logic gates whose first input terminal and output terminal are cross-coupled to each other, and output A ninth logic gate having a second input terminal of the seventh logic gate connected to a terminal, a second input terminal of the second logic gate and a first logic gate of the third logic gate; The output of the gate pair by the seventh and eighth logic gates is supplied to the input terminals respectively, and the second input terminal of the fifth logic gate and the first input terminal of the sixth logic gate are respectively supplied with the outputs. The outputs of the gate pair of the first and second logic gates are supplied to the second input terminal of the eighth logic gate and the first input terminal of the ninth logic gate, and the fourth and fifth logic gates are provided, respectively. The output of the gate pair by the logic gate of A second input terminal of the over preparative, the sixth
The second input terminal of the logic gate and the second input terminal of the ninth logic gate are supplied with the detection signals appearing on the first signal line, the second signal line, and the third signal line, respectively.
An initialization signal is supplied to the third input terminal of each of the second, fifth, and eighth logic gates, and a sequential circuit is configured by the first to ninth logic gates. The DC non-commutator motor according to claim 1. 4. A rotor comprising a three-phase stator winding, and a permanent magnet having a plurality of magnetic poles facing the stator winding,
A position detecting element that detects a rotational position of the rotor, and first and second elements that are formed on the rotor and that cause the position detecting element to output three different levels according to the rotational position of the rotor. An annular identification band in which the third constituent elements are alternately arranged along the circumferential direction, and the second constituent elements are arranged with a narrow width in a part of the first constituent element region, Driving means for supplying a current to the stator winding, and outputs of the position detecting element depending on the levels thereof are first, second, and third.
And a distributor for distributing the signal lines to the signal lines, and three output units connected to each other in a ring shape to send a drive command signal to the driving means, and to the first, second, and third signal lines. The output states of the output section are changed only when the first, second and third input terminals are connected and the first, second and third signal lines are activated in a preset order. A sequential circuit to be changed, and an initialization means for making the output state of the sequential circuit dependent on the output state of the distributor when the rotor is activated,
DC including an extraction circuit for extracting an output change of the position detecting element in the portion of the second component arranged with a narrow width in the identification band and outputting it as an absolute position detection signal of the rotor No commutator motor. 5. A first flip-flop, which is set when the first signal line is activated and is reset when the second signal line is activated, and the first flip-flop. A second signal line which is set when the first signal line becomes active after the second signal line is set and is reset when the second signal line becomes active.
5. The DC non-commutator motor according to claim 4, wherein an extraction circuit is constituted by the flip-flop of claim 1, and the absolute position detection signal is taken out from the output terminal of the second flip-flop. 6. A position detecting element by an integrated circuit, comprising a Hall power generator inside, and a circuit for transmitting the output of the Hall power generator as an output signal whose potential changes in three stages, the position detecting element being an integrated circuit, The DC non-commutator motor according to claim 4, wherein power is supplied to the motor through a power supply terminal of a three-phase stator winding.