JPH08172790A - Commutatorless dc motor driving equipment - Google Patents

Abstract

PURPOSE: To make it possible to generate a large counter torque in a commutatorless DC motor driving equipment which is driven based on the information on a rotation position which is obtained from counterelectromotive force of a motor. CONSTITUTION: A first positional signal composing means 6 generates two groups of positional signals of three phases from counter-electromotive force signals which are generated by stator windings 2, 3, and 4. The magnetic flux or a change in the magnetic flux when a main magnet 5 turns is detected by a magnetic flux detecting means 10 and its waveform is shaped by a pulse generating means 11. A second positional signal composing means 12 generates two groups of positional signals which conduct only between two specified current feeding terminals and whose conducting direction reverses according to output signals of the pulse generating means 11. A switching means 13 outputs the groups of signals from the first positional signal composing means 6 to a power supplying means 7 when a torque direction command input from outside is an acceleration command and it outputs the group of positional signals from the second positional signal composing means 12 to the power supplying means 7 when the torque directional command is a speed reduction command.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-commutator DC motor driving device which is required to change its rotation speed at high speed.

[0002]

2. Description of the Related Art A DC motor without commutator has a long life as compared with a DC motor with a brush because it has no mechanical contact. At the same time, it has little electrical noise, and in recent years, it has been widely applied to industrial equipment and video / audio equipment that require high reliability. This type of commutatorless DC motor drive is
A rotor position detecting element (for example, a Hall element) corresponding to a brush has been used for switching the energization phase of the stator winding. However, in order to reduce costs and reduce the size and thickness of motors, for example, Japanese Patent Laid-Open Nos. 4-67795 and 4 are disclosed.
There have been proposed some non-rectifying DC motor drive devices that do not use a rotor position detecting element as disclosed in Japanese Patent Publication No. 67796.

Now, a conventional commutatorless DC motor driving device which does not use a rotational position detecting element will be described with reference to the drawings. FIG. 10 is a block diagram showing the configuration of a conventional commutatorless DC motor drive device. In FIG. 10, 1 is a back electromotive force detecting means, 2, 3, 4 are stator windings of a motor stator, 5 is a main magnet of a motor rotor,
Reference numeral 6 is a first position signal synthesizing means, and 7 is a power supply means, which comprises a first drive transistor group 8 and a second drive transistor group 9.

Next, the operation of the above conventional example will be described.
The back electromotive force detection means 1 detects the potential difference between both ends of each stator winding from the voltages at the terminals A, B and C and the midpoint voltage of the stator windings 2, 3 and 4, and shapes from the zero cross point. The signals a ', b', and c'are generated and output. The three-phase shaped signals generated by the back electromotive force detecting means 1 are input to the first position signal synthesizing means 6, and the first position signal synthesizing means 6 is supplied.
Performs signal processing based on the input shaped signal and converts it into a three-phase first position signal group and a three-phase second position signal group.
This position signal group is input to the power supply means 7, and the power supply means 7 sequentially applies to each of the stator windings 2, 3, 4 according to the first position signal group and the second position signal group. Supply drive current in both directions.

FIG. 11 is a circuit diagram showing an example of the electric power supply means 7 which constitutes the non-rectifier DC motor drive device.
E is a DC power supply, 81, 82, 83, 91, 92, 93 are drive transistors, and the currents flowing through these transistors are converted into current conversion circuits 84, 85, 86, 94, 95, 96.
The stator windings 2, 3, 4 can be controlled by
Supply current to the. The first drive transistor group 8 has PNP transistors 81, 82, 83 connected to the current conversion circuits 84, 85, 86 as bases, respectively, and the emitters thereof are connected to the positive terminal of the DC power supply E Are the current supply terminals A, B of the stator windings 2, 3, 4
It is connected to C. The second drive transistor group 9 is
It has NPN transistors 91, 92 and 93 respectively connected to the current conversion circuits 94, 95 and 96 as bases, the emitters thereof are respectively connected to the negative side terminals of the DC power source E, and the collectors thereof are the stator windings 2, 3 and 4 current supply terminals A, B,
It is connected to C. Current conversion circuits 84, 85, 86,
94, 95, 96 convert into a current having a magnitude proportional to the input voltage value. However, the current conversion circuits 84, 8
The outputs of 5 and 86 are of the current-sink type, and each of the output terminals sucks a current having a magnitude proportional to the input voltage. The current conversion circuits 94, 95, 96 are current discharge type, and discharge a current having a magnitude proportional to the input voltage from each output terminal.

FIG. 12 is a signal waveform diagram of each part in the above conventional example. In FIG. 12, a, b, and c are counter electromotive force waveforms induced in the stator windings 2, 3, and 4, respectively.
At this time, the three output signals of the counter electromotive force detection means 1 are a ′,
It becomes like b'and c '. In the figure, d1, e1, and f1 are the first
A first position signal group synthesized by the position signal synthesizing means 6 of
g1, h1, and i1 are a second position signal group, and correspond to 6-phase rotational position signals obtained according to the rotational position of the motor.
These position signal groups are input to the inputs d, e, f of the first drive transistor group 8 and the inputs g, h, i of the second drive transistor group 9 shown in FIG. 11, respectively. Each of the transistors 81, 82, 83, 91, 92, 93 is
The added base current is amplified and a current proportional to each base current flows through each collector. As a result, the stator windings 2, 3 and 4 are energized with the currents shown in j, k and l in FIG. 12 in both directions. Such phase switching is sequentially performed to rotate the motor rotor to which the main magnet 5 is attached.

As described above, in the conventional configuration, the position signal for controlling the drive transistor of the motor is generated by utilizing the zero cross point of the back electromotive force signal generated in the stator windings 2, 3, and 4. I am letting you.

[0008]

However, in recent industrial equipment and video / audio equipment, demands for higher performance and higher operability have been increasing year by year. As a result, with respect to the motor incorporated in each device, it is required to realize a plurality of rotation speeds, and it is necessary to perform the mode transition at high speed.

However, in the above-mentioned conventional configuration, in the driving state in which the reverse torque or the brake torque is generated, the voltage drop corresponding to the winding resistance generated by the current flowing through the stator winding is generated in the stator winding. Sometimes it becomes larger than the back electromotive force, and it becomes difficult to perform stable deceleration operation due to the false detection of the zero cross point of the back electromotive force induced in the stator winding. There is a problem that it cannot be realized.

In view of the above problems of the conventional motor drive device, it is an object of the present invention to provide an inexpensive non-commutator DC motor drive device capable of generating large reverse torque and brake torque.

[0011]

SUMMARY OF THE INVENTION A commutatorless DC motor drive device of the present invention comprises a main magnet magnetized in multiple magnetic poles, and a three-phase stator winding facing the main magnet.
A counter electromotive force detection means for obtaining a shaping signal in response to the counter electromotive force generated by the main magnet on the stator winding, and a three-phase first position signal group in accordance with the shaping signal and a torque command given from the outside. A first position signal combining means for generating a three-phase second position signal group and a current path between one end of the DC power supply and the current feeding terminal of the stator winding are formed to form the first position signal group. A first drive transistor group that is responsive to energization control and a current path between the other end of the DC power supply and the current supply terminal to form a current path and a second position signal group that is responsive to energization control. The same phase as the back electromotive force generated in the predetermined stator winding of the three-phase stator windings by detecting the magnetic flux or changes in the magnetic flux when the main magnet rotates Magnetic flux detecting means for outputting the signal of So as to output a pulse signal in response to the pulse generator, and to energize only between the predetermined two current feeding terminals of the three-phase stator winding so that the energizing direction is reversed according to the output signal of the pulse generator. The second position signal synthesizing means for generating the third position signal group and the fourth position signal group, and the first position signal synthesizing means when the torque direction command input from the outside is the acceleration command. First and second
Is output to the first and second drive transistor groups, and when the deceleration command is issued, the third and fourth position signal groups of the second position signal combining means are output to the first and second drive transistors. And a switch means for outputting to the group.

[0012]

According to the present invention, with the above configuration, the braking torque is generated by switching the two-phase energization state of the stator winding with the pulse obtained by the magnetic flux detecting means and the pulse generating means during the deceleration driving. Phase switching can be stably performed without depending on the motor current, and a large reverse torque can be generated.

Further, since an FG (Frequence Generator) coil can be used as the magnetic flux detecting means and the pulse generating means, the magnetic flux detecting means and the pulse generating means are required in the motor equipped with the FG because it is necessary to control the speed of the motor. It is possible to improve the deceleration characteristic without newly providing.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A commutatorless DC motor drive device according to an embodiment of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a block diagram showing the configuration of a commutatorless DC motor drive apparatus according to a first embodiment of the present invention. The same elements as those of the conventional example shown in FIG. Is attached. That is, the back electromotive force detection means 1, the stator windings 2, 3, 4, the main magnet 5, the first position signal combination means 6, the power supply means 7, the first drive transistor group 8, and the second drive. Since the transistor group 9 has the same structure as the conventional one, its description is omitted. In the first embodiment of the present invention, in addition to the above configuration, a magnetic flux detecting means 10, a pulse generating means 11, a second position signal synthesizing means 12, and a switch means 13 are newly provided. The output of the magnetic flux detecting means 10 for detecting the magnetic flux or the change in the magnetic flux when the main magnet 5 rotates is input to the pulse generating means 11 and converted into a pulse whose waveform has been shaped. The output of the pulse generating means 11 is input to the second position signal synthesizing means 12 and generates a third position signal group and a fourth position signal group. The switch means 13 includes a first position signal group and a second position signal group which are outputs of the first position signal synthesizing means 6, and a third position signal group which is an output of the second position signal synthesizing means 12. And a fourth position signal group are input, and at the time of a normal acceleration torque command, the first drive transistor group 8 and the second drive transistor group 9 respectively receive the first position signal group and the second position signal group. When the deceleration command is issued, the third position signal group and the fourth position signal group are output to the first drive transistor group 8 and the second drive transistor group 9, respectively.

The operation of the first embodiment constructed as above will be described in detail below. However, in the embodiment of the present invention, the case where the acceleration torque is generated is the same as the conventional case, and therefore, only the case where the deceleration torque is generated will be described here.

The magnetic flux detecting means 10 comprises a main magnet 5
They are attached so as to face each other (four pole pairs are shown in the figure as an example), and a magnetic flux or a change in magnetic flux is detected as an electric signal. The magnetic flux detecting means 10 is attached such that the counter electromotive force induced in a predetermined stator winding when the main magnet 5 rotates and the output signal of the magnetic flux detecting means 10 are in phase with each other. In this embodiment, the stator winding 2,
3, 4 will be referred to as M1, M2, and M3, respectively, and M
The electrical angle of M2 is 120 ° for 1 and M3 for M2
Is delayed by 120 ° in electrical angle (similarly in other embodiments in the future), and is mounted so that the phase of the output signal of the magnetic flux detecting means 10 and the phase of the counter electromotive force generated in M1 coincide with each other.

FIG. 2 is a signal waveform diagram of each part in the first embodiment. In FIG. 2, a, b, and c are M respectively.
The counter electromotive force of M1, M2, and M3 is shown. Further, j2 is an output signal of the magnetic flux detecting means 10. Pulse generation means 1
The output signal of the magnetic flux detecting means 10 input to 1 is waveform-shaped by the comparator and output as a pulse signal.
This waveform is represented by k2 in FIG. 2, and the edge of the pulse waveform coincides with the zero-cross point of M1. The output of the pulse generating means 11 is output to the second position signal synthesizing means 12, and in the second position signal synthesizing means 12, the third position signal groups d2, e2, f2 and the fourth position signal group g2, h2, i
Generates 2. In the second position signal synthesizing means 12,
The output signal d2 is an inverted signal of the input signal k2, and the output signal e2
Is the same as the input signal k2, the output signal f2 is always 0, the output signal g2 is the same as the input signal k2, the output signal h2 is the inverted signal of the input signal k2, and the output signal i2 is always 0,
It can be configured with a simple logic circuit. The third and fourth position signal groups are input to the input terminals d, e, f, g, h, i of the first drive transistor group 8 and the second drive transistor group 9 by the switch means 13 when the deceleration command is issued. Is output.

Next, the operation of inputting such a third position signal group and a fourth position signal group to the power supply means 7 to generate deceleration torque will be described. The output signals f2 and i2 of the second position signal synthesizing means 12 are input to the terminals f and i of the power supply means 7 shown in FIG. Is not supplied with current, and the generated torque of M3 is always 0. The output signals d2, e2, g2, h2 of the second position signal synthesizing means 12 are input to the input terminals d, e, g, h of the power supply means 7. When the output k2 of the pulse generating means 11 is H, the current supplied from the DC power source E is the driving transistors 82, M.
2, M1, the driving transistor 91, and when the output k2 of the pulse generating means 11 is L, the current supplied from the DC power source E flows to the driving transistors 81, M1, M2, and the driving transistor 92. When a current is applied to the stator winding when the back electromotive force is positive and negative, acceleration torque and deceleration torque are generated, respectively. Further, even if the same current is supplied, a larger torque is generated in a portion where the counter electromotive force is larger. From these relationships, as shown in FIG.
The torque generated by is always the deceleration torque, and the torque generated by M2 is 3
The deceleration torque is in the period of / 2 and the acceleration torque is in the period of 3/1 (the acceleration torque is shown as "addition" and the deceleration torque is shown as "decrease" in the drawings, and the same applies to other embodiments). As a result, the total generated torque of M1, M2, and M3 becomes the deceleration torque in the period of 5/6 in consideration of the magnitude of the generated torque. In the conventional configuration, the phase switching malfunctions when the current is increased, but in the present embodiment, the phase switching timing can be determined regardless of the current value, so that a large deceleration torque can be generated. .

As described above, in the first embodiment of the present invention, by adding only one magnetic flux detecting means 10, it becomes possible to generate a large deceleration torque. Further, since the frequency or cycle of the pulse output from the pulse generating means 11 indicates the rotation speed of the motor, it is additionally possible to perform speed feedback control using this signal to perform highly accurate control of the rotation speed. It will be possible. On the contrary, in the case of a device that performs high-precision motor control, in many cases, an FG (Frequence generator) coil facing the main magnet 5 is used to perform speed feedback control. In this case, since this FG signal can be used as the output of the magnetic flux detecting means 10, it is not necessary to newly place an element in the motor when applying this embodiment, and it is inexpensive and a large deceleration torque can be obtained without reducing space efficiency. Can be generated.

(Embodiment 2) Next, a second embodiment of the present invention will be described. In the first embodiment described above, a large deceleration torque could be realized as compared with the conventional one, but there is a period in which the acceleration torque is generated in the period of 1/6, the torque fluctuation is severe, and the efficiency is reduced. There is a problem that Therefore, in the second embodiment, the deceleration torque is generated in all areas, and the driving efficiency can be improved. The configuration of this embodiment is the same as the configuration of the first embodiment shown in FIG. 1, but the mounting phase of the magnetic flux detecting means 10 in the first embodiment is a predetermined value when the main magnet 5 rotates. Stator winding (here stator winding 2
It is mounted so that the phase of the counter electromotive force induced by M1) and the phase of the output of the magnetic flux detecting means 10 coincide with each other, but in this embodiment, it is mounted at a position advanced by 30 °.

The operation of the second embodiment constructed as above will be described. FIG. 3 shows the signal waveform of each part. Waveforms a, b, and c represent the back electromotive force signals of M1, M2, and M3. Waveforms j3 and k3 are output signal waveforms of the magnetic flux detecting means 10 and the pulse generating means 11, respectively. As can be seen from FIG. 3, the phase is advanced by 30 ° with respect to the counter electromotive force of M1. The output of the pulse generating means 11 is input to the second position signal synthesizing means 12, and the second position signal synthesizing means 12
The third position signal groups d3, e3, f3 and the fourth position signal groups g3, h3, i3 are output. The third position signal groups d3, e3, f3 and the fourth position signal groups g3, h3
, I3 are output to the power supply means 7 at the time of deceleration command,
The motor is driven. In this case, current is supplied only to M1 and M2. When the counter electromotive force of M1 is larger than the counter electromotive force of M2, a current flows from the DC power source E through the drive transistor 82, M2, M1, and drive transistor 91 in FIG. 11, and the counter electromotive force of M1 is small. A current flows through the drive transistor 81, M1, M2, and the drive transistor 92. In FIG. 3, M1
The state of the total generated torque of M2 and three phases is shown. Here, the generated torque of M3 is 0 as in the first embodiment.

As described above, in the second embodiment of the present invention, the magnetic flux detecting means 10 is arranged so that the output signal of the magnetic flux detecting means 10 advances by 30 ° with respect to the counter electromotive force signal generated in the predetermined stator winding. By installing, the deceleration torque is generated over the entire period, and even when the same current is applied,
The average deceleration torque is larger than in the first embodiment.

(Embodiment 3) Next, a third embodiment of the present invention will be described. FIG. 4 is a block diagram showing the configuration of the third exemplary embodiment of the present invention. In FIG. 4, the first and second
The same components as those of the embodiment are attached with the same numbers. Third
In this embodiment, the output of the pulse generating means 11 is the first
Is input to the phase delay means 14 of. The first phase delay means 14 generates three-phase signals delayed by 0 °, 120 °, 240 ° with respect to the input signal, and outputs them to the switch means 13 as a fifth position signal group. At the same time, the output of the first phase delay means 14 is input to the inverting means 15 provided in place of the second position signal synthesizing means 12 and is inverted respectively to form the sixth position signal group as the switch means 13.
Is output to The fifth position signal group and the sixth position signal group are output to the first drive transistor group 8 and the second drive transistor group 9 via the switch means 13 when the deceleration command is issued, and the motor is driven. It

FIG. 5 shows the signal waveform of each part in the third embodiment constructed as described above. a, b, and c are counter electromotive forces of M1, M2, and M3, respectively, and k4 is a waveform diagram of the output signal of the pulse generating means 11, and as can be seen from the figure, the mounting phase of the magnetic flux detecting means 10 is the first embodiment. Similar to the example, a predetermined stator winding (here, stator winding 2 M
Set to 1. ) Induced back electromotive force and magnetic flux detection means 10
They are mounted so that the output phases of the two match. g
4, h4, and i4 are a sixth position signal group, and are 0 °, 120 °, 2 with respect to the output signal k4 of the pulse generating means 11.
This signal is delayed by 40 ° in phase. Also, d4, e4, f
Reference numeral 4 is a fifth position signal group.

When a current is supplied from the power supply means 7 to the motor by the fifth position signal group and the sixth position signal group, the stator windings 2, 3 and 4 are
When the counter electromotive force induced in the stator winding is positive, the corresponding drive transistor in the second drive transistor group 9 is energized and current is flown from the midpoint. When the counter electromotive force is negative, the corresponding drive transistor in the first drive transistor group 8 is energized, and a current is made to flow from the DC power source E toward the midpoint. With such energization timing, the torques generated in the three-phase stator windings 2, 3, and 4 become deceleration torques over the entire period.

As described above, in the third embodiment of the present invention, while the first and second embodiments supply current to the two stator windings to generate the deceleration torque, the three By supplying currents to the respective stator windings, it is possible to further improve the deceleration torque generation efficiency of the motor as compared with the first and second embodiments.

Further, the first used in the third embodiment
The configuration of the phase delay means 14 will be briefly described. An example thereof is shown in FIGS. 6 and 7. FIG. 6 shows a configuration using the PLL circuit 21. The PLL circuit 21 is composed of a phase comparison circuit (PC) 22, a voltage controlled oscillator circuit (VCO) 23 and a 1/3 frequency divider circuit 24 whose frequency changes according to an input signal, and the output of the PLL circuit 21 is , A signal having a frequency three times that of the output signal of the pulse generating means 11 is phase-locked. This signal is input to the clock terminal of the shift register 25, and the output signal of the pulse generating means 11 is input to the data terminal of the shift register 25. As a result, by extracting the output of an appropriate bit of the shift register 25, it is possible to create a signal having a phase delayed by 120 ° and 240 ° from the signal input to the first phase delay means 14. With the configuration using the PLL circuit 21, it is possible to synthesize a three-phase pulse signal from a one-phase pulse signal regardless of the rotation speed of the motor.

Next, a configuration using the filter of FIG. 7 will be described. The input signals are fed to the LPF 26,
In this method, the signal is generated by delaying the phase by passing it through 27 and then shaping the waveform through comparators (CMP) 28, 29. When the speed change range of the motor is small, it can be realized by configuring an extremely simple filter. When the speed change range is large, it can be realized by configuring a linear phase filter.

(Fourth Embodiment) Finally, a fourth embodiment will be described. FIG. 8 shows the configuration of the fourth embodiment. The same components as those in the first and second embodiments have the same numbers. The difference from the first embodiment is that the input signal to the second position signal synthesizing means 12 is not energized M
The back electromotive force signal of No. 3 is used.
The back electromotive force signal m (here, the back electromotive force signal for M3) detected by the back electromotive force detection means 1 and waveform-shaped is input to the second phase delay means 16, and input to the second phase delay means 16. The signal p delayed by 120 ° is output to the second position signal synthesizing means 12. This second phase delay means 1
6 can be realized by using a circuit similar to that shown in FIGS. This signal p is the pulse generation means 1 of the first embodiment.
It is a signal equivalent to the output signal k2 of 1 and other operations are the same as those in the first embodiment.

FIG. 9 is a signal waveform diagram of each part of the fourth embodiment. The counter electromotive forces a, b, c and M3 of the counter electromotive force detecting means 1 are shown.
Corresponding to the output signal m, the output signal p of the second phase delay means 16, the third position signal groups d5, e5, f5, and the fourth position signal groups g5, h5, i5. With this configuration, the same deceleration torque characteristics as those of the first embodiment can be realized.

As described above, in the fourth embodiment of the present invention, attention is paid to the fact that an accurate position signal can be constructed from the back electromotive force signal of the stator winding that does not supply current. It is possible to generate a large brake torque without adding a new detection element as in the third embodiment.

In the fourth embodiment, the second phase delay means 16 delays 120 °, but even if the second phase delay means 16 delays 240 °, the same logic of the second position signal synthesizing means 12 is slightly changed. It can be realized similarly.

Further, by making the output of the PLL circuit of the second phase delay means 16 to output a frequency of about 12 times and delaying the input signal by 90 ° or 210 °, and by making the same constitution, The deceleration torque characteristic in the second embodiment can be realized.

[0035]

As is apparent from the above embodiments, according to the present invention, the magnetic flux detecting means is simply provided in the conventional commutatorless DC motor drive device having no conventional rotational position detecting means, or a new one is provided. It is possible to generate a large reverse torque or brake torque without providing any special detection means in the motor, and as a result, it is possible to greatly improve the deceleration characteristics and realize motor control with excellent responsiveness. it can.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of first and second embodiments of the present invention.

FIG. 2 is a signal waveform diagram of each part in the first embodiment of the present invention.

FIG. 3 is a signal waveform diagram of each part in the second embodiment of the present invention.

FIG. 4 is a block diagram showing a configuration of a third exemplary embodiment of the present invention.

FIG. 5 is a signal waveform diagram of each part in the third embodiment of the present invention.

FIG. 6 is a block diagram showing a configuration of a first phase delay means according to a third embodiment of the present invention.

FIG. 7 is a block diagram showing another configuration of the first phase delay means in the third embodiment of the present invention.

FIG. 8 is a block diagram showing a configuration of a fourth exemplary embodiment of the present invention.

FIG. 9 is a signal waveform diagram of each part in the third embodiment of the present invention.

FIG. 10 is a block diagram showing a configuration of a conventional example.

FIG. 11 is a block diagram showing a configuration of a power supply unit in an embodiment and a conventional example.

FIG. 12 is a signal waveform diagram of each part in a conventional example.

[Explanation of symbols]

 1 Back Electromotive Force Detecting Means 2 Stator Winding (M1) 3 Stator Winding (M2) 4 Stator Winding (M3) 5 Main Magnet 6 First Position Signal Synthesis Detecting Means 7 Power Supplying Means 8 First Drive transistor group 9 Second drive transistor group 10 Magnetic flux detection means 11 Pulse generation means 12 Second position signal combination means 13 Switch means 14 First phase delay means 15 Invert means 16 Second phase delay means

Claims (8)

[Claims] 1. A main magnet magnetized into multiple magnetic poles, a three-phase stator winding facing the main magnet, and a counter electromotive force generated by the main magnet on the stator winding. Back electromotive force detection means for obtaining a shaping signal, and a first position for generating a three-phase first position signal group and a three-phase second position signal group in response to the shaping signal and a torque command given from the outside A first drive transistor group in which energization control is performed in response to the first position signal group by forming a current path between one end of a DC power source and a current supply terminal of the stator winding by a signal combining means. And forming a current path between the other end of the DC power supply and the current feeding terminal,
The second drive transistor group that is energized and controlled in response to the position signal group, and a magnetic flux or a change in the magnetic flux when the main magnet rotates to detect a predetermined one of the three-phase stator windings. Magnetic flux detecting means for outputting a signal of the same phase to the counter electromotive force generated in the stator winding, pulse generating means for outputting a pulse signal in response to the output signal of the magnetic flux detecting means, and the three-phase The third position signal group and the fourth position signal group are generated so that the current is supplied only between two predetermined current supply terminals of the stator winding and the energization direction is inverted according to the output signal of the pulse generating means. When the second position signal synthesizing means to be activated and the torque direction command input from the outside are acceleration commands, the first and second position signal groups generated by the first position signal synthesizing means are converted to the first and second position signal groups. Output to the second drive transistor group When the deceleration command, the third and fourth of the position signal group first and the second position signal synthesizing means
And a switch means for outputting to the second drive transistor group, a commutatorless DC motor drive device. 2. A main magnet magnetized to have multiple magnetic poles, a three-phase stator winding facing the main magnet, and a counter electromotive force generated by the main magnet on the stator winding. Back electromotive force detection means for obtaining a shaping signal, and a first position for generating a three-phase first position signal group and a three-phase second position signal group in response to the shaping signal and a torque command given from the outside A first drive transistor group in which energization control is performed in response to the first position signal group by forming a current path between one end of a DC power source and a current supply terminal of the stator winding by a signal combining means. And forming a current path between the other end of the DC power supply and the current feeding terminal,
The second drive transistor group that is energized and controlled in response to the position signal group, and a magnetic flux or a change in the magnetic flux when the main magnet rotates to detect a predetermined one of the three-phase stator windings. Magnetic flux detecting means for outputting a signal having a phase advanced by 30 ° with respect to the counter electromotive force generated in the stator winding of
The pulse generator which outputs a pulse signal in response to the output signal of the magnetic flux detector and the predetermined two current supply terminals of the three-phase stator winding are energized to generate an output signal of the pulse generator. According to the third
Second position signal synthesizing means for generating the position signal group and the fourth position signal group, and when the torque direction command input from the outside is an acceleration command, the first position signal synthesizing means generates the first position signal synthesizing means. The first and second position signal groups are output to the first and second drive transistor groups, and when the deceleration command is issued, the second position signal group is output.
And a switch means for outputting the third and fourth position signal groups of the position signal synthesizing means to the first and second drive transistor groups. 3. A main magnet magnetized into multiple magnetic poles, a three-phase stator winding facing the main magnet, and a counter electromotive force generated by the main magnet on the stator winding. Back electromotive force detection means for obtaining a shaping signal, and a first position for generating a three-phase first position signal group and a three-phase second position signal group in response to the shaping signal and a torque command given from the outside A first drive transistor group in which energization control is performed in response to the first position signal group by forming a current path between one end of a DC power source and a current supply terminal of the stator winding by a signal combining means. And forming a current path between the other end of the DC power supply and the current feeding terminal,
The second drive transistor group that is energized and controlled in response to the position signal group, and a magnetic flux or a change in the magnetic flux when the main magnet rotates to detect a predetermined one of the three-phase stator windings. Magnetic flux detecting means for outputting signals in phase with the counter electromotive force generated in the stator winding, waveform shaping means for obtaining a pulse signal in response to the output signal of the magnetic flux detecting means, and the waveform shaping means 0, 12 for output signal
First phase delay means for generating a signal having a phase delayed by 0 ° and 240 °, invert means for respectively inverting the three-phase output signals of the first phase delay means, and a torque direction command input from the outside. Is an acceleration command, the first and second position signal groups generated by the first position signal synthesizing means are output to the first and second drive transistor groups, and when the deceleration command is, the inversion means is output. And a switch means for outputting the output of the first phase delay means to the first and second drive transistor groups. 4. The non-rectifier DC motor drive device according to claim 3, wherein the first phase delay means is configured by using a PLL circuit. 5. The non-rectifier DC motor drive device according to claim 3, wherein the first phase delay means is configured by using a filter circuit. 6. A main magnet magnetized into multiple magnetic poles, a three-phase stator winding facing the main magnet, and a stator coil that responds to a counter electromotive force generated by the main magnet. Back electromotive force detection means for obtaining a shaping signal, and a first position for generating a three-phase first position signal group and a three-phase second position signal group in response to the shaping signal and a torque command given from the outside A signal synthesizing means, a first drive transistor group for forming a current path between one end of a DC power source and a current feeding terminal of the stator winding, and controlling energization in response to the first position signal; A second drive transistor group that forms a current path between the other end of the DC power source and the current supply terminal and that is energized and controlled in response to the second position signal; and the counter electromotive force detection means. Output signal corresponding to a given stator winding of From the second phase delay means for generating a signal whose phase is delayed from the pulse generator and the two current feeding terminals of the two stator windings other than the predetermined stator winding. Second position signal combining means for generating a fifth position signal group and a sixth position signal group in which the energization direction is inverted according to the signal, and a torque direction command input from the outside is an acceleration command. , Outputting the first and second position signal groups generated by the first position signal synthesizing means to the first and second drive transistor groups, and at the time of deceleration command, the second position signal synthesizing means 5th and 6th
And a switch means for outputting the position signal group of 1) to the first and second drive transistor groups. 7. The non-rectifier DC motor drive device according to claim 6, wherein the second phase delay means is configured by using a PLL circuit. 8. The non-rectifier DC motor drive device according to claim 6, wherein the second phase delay means is configured by using a filter circuit.