JPH033699A - Reluctance type stepping motor - Google Patents

Abstract

PURPOSE:To accelerate a stepping speed by adding a diode and a capacitor having a small capacitance on the side of a power supply. CONSTITUTION:A diode 9a is connected to a DC power input terminal to prevent the stored magnetic energy from returning to the power supply, an extinction of the stored magnetic energy causes a large current at a high voltage to rush into the next M, N to be exited, and a quick storing of magnetic energy is completed. The magnetic energy stored in exciting coils K, L of the previous stage vanishes quickly too. When there is a time interval between the stop time whereat the exciting coils K, L of the previous stage are deactivated and the start time whereat the exciting coils M, N of the next stage are activated, the magnetic energy is charged temporarily into a capacitor 10a having a small capacity. Thereby, a high speed stepping operation can be performed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] It can be used in place of a serze motor, which is used as a drive source for a rosette arm or a drive source for step-by-step movement of members of an automatic machine.

[Conventional technology]

A stepping motor using a magnetic rotor is known as a similar technology, but its output torque is small and its field of use is different from that of the device of the present invention.

Reluctance type stepping motors are produced in small quantities. Although the output torque is large, the response is poor and the stepping speed is low, so it is not widely used.

[Problems to be Solved by the Invention] First Problem: Although the output torque is large, there is a problem that the stepping speed is small.

Second problem: In order to prevent step-out and perform a predetermined step operation at high speed, there is a known method of gradually increasing and gradually decreasing the frequency of the stepping electric signal and then stopping it, but the electric circuit is complicated and expensive. Therefore, its performance is not good (there are many problems).

[Means to solve the problem]

First Means: In an n-phase (n=x, 3.<z, . . . ) full-wave reluctance stepping motor, an n-phase excitation coil attached to an n-phase magnetic pole; Second. Each of the excitation coils of the third, . . . a first excitation coil, a second excitation coil; Second excitation coil, third excitation coil, etc.
A semiconductor switching element connected to both ends of the first, second, third, . A first. A first excitation coil and a second excitation coil also connected. The second. second excitation coil, third
．． An energization control circuit consisting of a third excitation coil, an n-phase full-wave stepping electric signal generator of a predetermined frequency, and an electric current that energizes and conducts the stepping element to generate stepping torque. It is a means composed of a circuit.

Second Means In an n-phase (n=2,≠,!,...) single-wave reluctance stepping motor, the n
a first phase excitation coil; Second. Each of the excitation coils of the 3rd... phase is connected to the 1st... phase. Second. Each of the third, . . . excitation coils is connected to a semiconductor switching element connected to both ends of the first, second, third, . A first backflow prevention diode that is energized through the connected diode, a DC power supply that applies a voltage to the excitation coil via a semiconductor switching element, and a first backflow prevention diode that is connected in the forward direction to the positive pole of the DC power supply. excitation coil, and a second excitation coil also connected. The second. An energization control circuit consisting of an excitation coil attached to the n excitation coil, and an n capacitor attached to the small-capacity 1°th λ, which is connected between the output side of each backflow prevention diode and the negative pole side of the DC power supply. , an n-phase single-wave stepping electric signal generator of a predetermined frequency, and a corresponding seventh . Second
．． This means is constituted by an electric circuit that energizes and conducts a semiconductor switching element connected to an excitation coil mounted on the n excitation coil to generate stepping torque.

Third Means The stepping electric signal generator of the first or second means has a memory circuit for storing the required step number and a first counting circuit, and the step number is set in the second counting circuit. An electric circuit that sets 1/2 of the number of steps in the counting circuit and a stepping motor are started, and the number of steps is set to 1/2 according to the number of steps.
an electric circuit that starts subtraction in the second counting circuit, reads out the digital memory stored in the ROM, and reverses the reading of the digital memory in the ROM by a zero count output signal of the second counting circuit; An oscillation circuit that converts a signal into an analog signal and obtains an oscillation pulse frequency proportional to the analog signal, and an n-phase full-wave or single-wave stepping electric signal is output by inputting the frequency of the output oscillation pulse of the oscillation circuit. The input of the output stepping electrical signal of the pulse distributor to the energization control circuit of the motor is started by the pulse distributor and the drive start command electric signal of the reluctance stepping motor, and the count value of the first counting circuit becomes zero. This means is constituted by an electric circuit that cuts off the input of the oscillation pulse of the oscillation circuit to the pulse distributor when the count reaches the count.

[Operation] During one step operation, energization of one excitation coil is cut off and its stored magnetic energy is released, and when energization of the next excitation coil is started, magnetic energy is stored.

The reason why a reluctance type stepping motor can obtain a large output torque is because of the significantly large stored magnetic energy of the above-mentioned excitation coil.

A large amount of stored magnetic energy requires time to disappear and accumulate, so the step frequency cannot be increased. Therefore, there is an inconvenience that high-speed step operation is impossible.

If seven diodes are inserted on the positive terminal side of the applied DC power supply to prevent the accumulated magnetic energy from flowing back into the power supply, high voltage and large current will cause the magnetic energy to disappear in the excitation coil to be energized next. The magnetic energy rushes in, and the rapid accumulation of magnetic energy is completed, and the magnetic energy of the excitation coil in the previous stage also rapidly disappears.

Therefore, high-speed step operation can be performed.

When there is a time between the stop of energization of the excitation coil in the previous stage and the start of energization of the excitation coil in the next stage, magnetic energy is temporarily transferred to a capacitor of small capacity (0, / -0, 3 microF). By charging it, the same purpose can be achieved.According to actual measurements, the output is about 30θ watts, and magnetic energy can be transferred in about -0 microseconds.

Therefore, there is an effect of solving the first problem.

As will be described later with reference to Figure ≠, the amount of digital signals at each address of the ROM corresponding to the number of steps is read out, this digital signal is converted to an analog signal, and a stepping electric signal corresponding to a frequency proportional to this analog signal is generated. Depending on the frequency, it accelerates in the shortest possible time without losing synchronization, and when the number of steps reaches %, it reverses the reading of the ROM and decelerates in the shortest possible time. Therefore, the numerical control of the load movement can be carried out without stepping out (in the shortest possible time), which has the effect of solving the second problem.

〔Example〕

The present invention will be described in detail with reference to FIG. 1 and subsequent figures.

Components with the same symbols in each drawing are the same members, so a duplicate description thereof will be omitted.

FIG. 1(a) is a sectional view showing the configuration of the salient poles of the rotor, the magnetic poles of the fixed armature, and the excitation coil in seven examples of two-phase reluctance stepping motors to which the present invention is applied. All angles shown below are in electrical angles.

In Fig. 1(a), the symbol / is a rotor, and its salient pole /
al/1) The width of l... is 0 degrees, and each is arranged at an equal pitch with a phase difference of 360 degrees.

The rotor is made by known means of laminating silicon steel plates. symbol! is the axis of rotation.

The symbol G is a gear bearing, and the balls are omitted and not shown.

The magnetic poles /Aa, /Ab, . . . are made by the same means as one rotor l together with the fixed armature magnetic core /6 which forms a magnetic path. On the end faces of the magnetic poles /Aa, /Ab,...
Projected teeth /Aa-/, /Aa-2, .

Excitation coils /7a, /7b are provided at the magnetic pole /4 a * /A b + "'.

... are wound around each magnetic pole /4a, /Ab, ...
・are arranged at equal pitches on the circumferential surface as shown.

FIG. 1(b) is a developed view of the above-mentioned magnetic poles and salient poles.

Symbols Ja, Ab, . . . in FIG. 1(a) are cooling fins for heat radiation, and a base part B is fitted on the outside of the fixed armature/6. The symbol 2 is the cylindrical outer housing and serves as an outer cover for the cooling fins.

The circular holes u/a, 2/b, . . . are screw holes for fastening.

As mentioned above, FIG. 1(a) is a sectional view of the structure, and FIG. 1(b) is a developed view thereof. A developed view of FIG. 1(b).

The details will be explained with reference to FIG. 1(a).

In FIG. 1(b), the annular portion 16 and the magnetic poles /Aa, /
Ab, . . . are made by a well-known method of laminating and solidifying silicon steel plates, and become fixed armatures. The part marked with the symbol /A is a magnetic core that serves as a magnetic path.

Magnetic poles /Aa, /Ab, - have excitation coils /7
a, /7b, . . . are wrapped.

There are salient poles /a*/b? on the outer periphery of rotor l.・
... are provided, magnetic poles /Aa, /Ab, - teeth /Aa
-/, /6a-2,... and 0. They face each other with a gap of about 0.2 mm between them. The width of the teeth and the diameter of the salient pole are equal, and the separation angle of each tooth is 720 degrees.

Teeth in Figure 1(b) /4a-/, /Aa-2, /6a-
3, -.- is three per magnetic pole, but it can also be implemented with two or three or more.

The output torque increases in proportion to the number of teeth per magnetic pole.

Also, the step angle is small and the resolution is good. is attracted.

At the same time, the excitation coils /71) and nf (the same connection body of both coils is called excitation coil M) are energized. Therefore, from the position shown in FIG. 1(b), it is driven by a predetermined angle in the direction indicated by the arrow and then stopped. The stopping points are magnetic poles /Aa, /
This is the point where the anti-torque due to Ae and the positive torque due to the magnetic poles, #, and f are j lanced.

The torque curve of the former is a curve in the time chart of the Deaf Diagram,
? qa, and the latter torque curve is shown as curve 39b.

The curved point 3qc is a counter-torque, as described above. 6 lance points are
The straight line becomes 1IoO point.

The point of the straight line to changes depending on the shape of the torque curve, but
When the rotor / shifts to the left or right from the point of the straight line tio,
It is preferable that the torque curve has a large return torque.

Therefore, the above-mentioned object is achieved by changing the shape of the facing surfaces of the salient pole and the teeth.

When excitation coils /7a and /7e are de-energized, excitation coils /7C and /7g are connected to excitation coil L.
It is called. ) is energized, the rotor l rotates qo degrees and stops.

When excitation coils /7b and /7f are de-energized, excitation coils 17d and 17h (the connected body of both coils is referred to as excitation coil N) are energized, and rotor / rotates 90 degrees.

As described above, the /step is driven as a 90-degree λ-phase full-wave stepping motor.

Next, details of the control of energization of L, M, and N to the excitation coil will be explained with reference to FIG. 2(a).

In FIG. 2(a), the inputs to terminals 3a, 3b, 3c, and 3d are stepping electrical signals, which can be obtained by the well-known circuit shown in FIG. 3.

In FIG. 3, a block circuit /3 is an oscillator that oscillates electric pulses with a predetermined period, and its output electric pulses are input to a pulse distributor /3 and sent to a terminal 15a.

/jb, /! A two-phase full-wave stepping electric signal is output from ;c and /jd.

The outputs of terminals /ja, 15b, . . . are input to terminals 3e, 3b, . . . in FIG. 2(a), respectively.

The input to terminals 3a and 3b is the curve 3! of FIG. ;h.

3 left, . . . and curves 74a, 3Ab, .

Terminal! The inputs for c and Jd are the curve 37a in FIG.

37b, . . . and curves 3ga, 3gb, . . . and the phases are shifted by 90 degrees.

The curve input to terminal 3a, ? By the electric signal of 5a,
Since the transistors 7a and 7b are conductive, the exciting coil K
is energized, and after a predetermined time, an electric signal of curve 77a is inputted from terminal 3c, transistors ♂a and ♂b become conductive, and excitation coil M is energized.

Therefore, as described above with respect to the torque curves 39a and 39b in FIG. 6, the torque stops at the point on the straight line 110.

Next, since the electric signal of the curve 36a is inputted from the terminal 3b, the transistors 7c and 7d become conductive, so that the excitation coil L is energized. At the same time, since the input to the terminal 3a is cut off, the transistors 7a and 7b are turned non-conductive. The magnetic energy stored in the excitation coil is transferred via the diodes r//a, //b according to 5 customary means.
Terminal 2a for power supply.

2b is refluxed. Therefore, unless the applied voltage is increased, the extinction time of magnetic energy cannot be reduced.

If the power source is set to a high voltage, the current flowing through the excitation coil becomes excessive, causing the inconvenience of burnout.

If a rapid stepping operation is performed, a counter torque is generated due to the discharge current of the magnetic energy, which inconveniently reduces the output torque.

Furthermore, since the start of energization of the excitation coil L to be energized next is delayed, there is an inconvenience that the torque decreases.

The device of the present invention has the effect of eliminating the above-mentioned disadvantages simply by adding the diode Y9a shown in FIG. 2(a). That is, when the excitation coil is de-energized, the discharge of the stored magnetic energy is interrupted by the diode a, so that the transistors 7c and 7c, which are conductive at the same time,
7d, flows into the exciting coil L as a high voltage,
Accumulates magnetic energy rapidly.

Songs in Figure 6 i+/a, tI/b, qtc,
II/a shows the energization curve of L in the excitation coil.

The descending part of curve */a (current to exciting coil) and curve '4
The width of the rising part of /b (current of exciting coil L) is dotted line 1I
The width is between 2a and t12b, and it becomes extremely rapid. 3
With a motor with an output of 0.00 watts, it will take about 30 microseconds.

Therefore, even if the stepping frequency is increased, high-speed stepping can be performed without generating the above-mentioned counter torque or reduced torque, and therefore without causing any inconvenience.

Further, the voltage of the power supply terminals ja, 2b may be a low voltage as long as the required excitation current exceeds the back electromotive force.

The curve in Figure 2...? ? a, , 37b, ”' + curve 3zaa, 31:b.

The above-mentioned effects are the same for the energization of the excitation coil MN by . . . The diode 9b also has the same effect as the diode a.

The capacitors 1I2a,/(N:r) are not necessarily required, but are provided for protection when there is a difference in the timing of conduction and non-conduction of each transistor.

Although this embodiment has been described with respect to an embodiment of a λ-phase full-wave stepping motor, it is also applicable to three-phase, ≠-phase, . . . full-wave cases.

In this specification, L is used for the first phase excitation coil. The first excitation coil and the second phase excitation coils M and N are connected to the first excitation coil and the second phase excitation coil M and N, respectively.
It is called the second excitation coil, and the same name means is used even when the number of phases increases.

Next, an energization control circuit for a three-phase single-wave reluctance stepping motor will be explained with reference to FIG. 2(b).

In FIG. 2(b), the input signals of the stepping motor inputted from the terminals Ja, Jb, and 3c are obtained by a well-known oscillator and pulse distributor, and are obtained from the terminals 3a, 3b, and 3c.
The input signals of 3c correspond to the electric signal curve ' of FIG. 6, respectively.
13 a, 'i'3t) *...9 curve bonds a, I
/, dab, . . . 9 curves 113a, datb, .

Curve '13a, 41a, Hiro! a is 1 each
．． The phase is delayed by 20 degrees.

The number of magnetic poles attached to the excitation coils P, Q, and R is 6,
Two pieces at a time will be in symmetrical positions. Therefore, there are six magnetic poles and six excitation coils, which are arranged at a mechanical angle of 60 degrees apart on the circumferential surface.

When a stepping electric signal is input from terminals 3a and 3b, transistors 7a, 7b, and 7c.

7d becomes conductive, and the excitation coils P and Q are energized.

The rotor is driven and stopped at a predetermined position.

Next, when the input signal at the terminal 3a disappears, there is an input signal at the terminal 3c, so it rotates by a predetermined angle and stops.

The step angle is iro degrees. The order of energization of the second, third, etc. is as follows: excitation coil P, Q-+Q, R-+H,
p→P, Q→. Curve 4 which becomes the input signal of terminal 3a
Z,? When the electric signal at a disappears, the magnetic energy is stored in the capacitor 10a without being returned to the power supply because of the presence of the diode a, and its capacitance becomes a small capacity corresponding to the inductance of the excitation coil P. This allows it to be charged at a high voltage.

Therefore, the energization of the exciting coil P decreases rapidly.

After a predetermined time, the curve /a, ? The electric signal b starts energizing the excitation coil P again, but the capacitor /(7
Due to the high voltage of a, the conduction current rises rapidly.

Other excitation coils Q, R and diode r! The functions and effects of 7b and 7b and capacitors 10o and 10c are also exactly the same.

Therefore, there is an effect that high-speed stepping can be performed. Another advantage is that the power supply voltage can be low. In this embodiment, a three-phase, single-wave stepping motor has been described. phase.

It can also be applied to ... and has the same effect.

The excitation coil of the first phase is connected to the first excitation coil, the second excitation coil, and the third excitation coil.
The excitation coil of the phase is connected to the second phase. It is called the third excitation coil.

As can be understood from the above explanation, according to the device of the present invention, a reluctance-type stepping motor that maintains the large output torque and responds to a high step frequency can be obtained, and there is no need to increase the power supply voltage. Therefore, it has the characteristic of being able to obtain effective technical means.

Next, referring to FIG. μ, a numerically controlled driving means for a higher speed load will be explained. In Fig. ψ, the symbol /g is a computer in which required types of numerical values for numerical control of the load are stored.

When an electrical signal instructing the number of pulses for load control of N pulses is inputted from the terminal /fa, N pulses are outputted from the terminal /qa and placed in the counting circuit 2Ja.

At the same time, -N pulses are outputted from the terminal /9b and placed in the counting circuit 22b.

A set signal is input from the terminal uj, and each counting circuit is reset to zero before the above-mentioned number setting operation. Terminal 23
The voltage is divided by the resistor JOh, , 30b, and the divided voltage becomes the base voltage of the transistor 29b.

Therefore, a set base current flows through the transistor u9a, and the capacitor is charged with a current proportional to this current. Transistors 2qa and 2qb are both activated in the active region. When the charging voltage reaches a predetermined value, the trigger diode 3/ becomes conductive and is discharged. Therefore, it becomes a pulse oscillation circuit, and the oscillation frequency is the transistor u9.
k) increases in proportion to the base current.

The output of this pulse oscillation circuit is input to a pulse distributor /q via an AND circuit /lla, and its output is sent to a terminal 1.
5a, 15b, . . .

The outputs of the terminals /ja, /jb, . . . are the same as the outputs of the terminals with the same symbols described above with reference to FIG. 3, and are two-phase full-wave stepping electric signals. Therefore, Fig. 2(a)
By inputting the signal to the terminals 3a, 3b, . . . of the excitation current control circuit, an advance of /step is performed every seven output pulses of the AND circuit /4/a.

A circuit including three TK type flip-flop circuits is generally used as the pulse distributor.

In order to start driving the stepping motor, terminal 211 is
A pulse electric signal is input from c and 211d.

This electric signal causes the C terminal of the flip-flop circuit J4a (hereinafter referred to as 2 circuits) and the F circuit 2tlb.
The output of the C terminal becomes high level.

Since the upper input of the AND circuit/9a becomes a high rail, the output of the pulse oscillation circuit is input to the pulse distributor/da, and the stepping motor is started.

The resistance ratio of the resistors 3θa, .

Also, since the lower input of the AND circuit 27a becomes high level, the output (oscillation pulse) of the AND circuit la is sent to the C terminal of the counting circuit 22c (which has already been reset to zero due to the input of only one terminal). It is input and counted up.

A set digital amount is stored in advance at each address in the ROM 25.

Every time the counting circuit 22c counts up, the digital memory at the address corresponding to each count is read out and the D/
An analog signal corresponding to the digital memory is input to the A conversion circuit 2B and output, and the output is configured to gradually increase the voltage drop across the resistor 30b.

Therefore, the base current of transistor 29a increases correspondingly, and the frequency of the pulse oscillation circuit also increases, so that the stepping motor is accelerated. The degree of acceleration is determined by adjusting each constant of the electric circuit so that it reaches its maximum value without causing step-out.
ROM2! ;'s digital memory is selected.

As mentioned above, the stepping motor according to the present invention can rotate at high speed, but there are limitations.

When the oscillation frequency of the oscillation circuit approaches the above limit, R
OM2! The digital memory r has a constant value, and the pulse oscillation frequency of the oscillation circuit is also maintained at a constant value. Therefore, the rotational speed of the stepping motor also becomes a corresponding constant speed.

When the output pulse number of the AND circuit/<Za becomes %N pulses, it is subtracted by the input of the C terminal of the counting circuit 22''O, so the counting circuit 22b becomes a zero count, and the R terminal of the 2 circuit -<Za becomes It is energized and inverted, and a Q pulse is obtained.The output of the AND circuit 27a is cut off.Therefore, since the counting circuit 22c is subtracted by the input pulse of the C terminal, the reading of the address of ROblj is reversed. Since the output voltage of the V-conversion circuit Coro gradually decreases, the pulse frequency of the oscillation circuit also gradually decreases.

Therefore, the stepping motor is decelerated.

The acceleration and deceleration described above are symmetrical. It is also necessary to prevent synchronization during deceleration.

The output pulse of the AND circuit/<<a is the C of the counting circuit a.
Since it is also input to the terminal, it is subtracted, and with the end of N steps of the stepping motor, the counting circuit 22a becomes zero count, and this output is input to the S terminal of the P circuit utlb, so it is inverted and output to the AND circuit /lla The upper input of is converted to a low level, and the change in the output of pulse distribution circuit /q is stopped.

Therefore, the stepping motor stops, and the load also takes N steps and is stopped and held by the lock torque.

The graph in FIG. 5 shows the relationship between the number of pulse oscillations (horizontal axis) and the pulse oscillation frequency (vertical axis), which are the outputs of the AND circuit/4a described above.

At startup, it starts at the self-starting frequency F (indicated by straight line 3), and the stepping frequency curve? As shown in λ, the speed increases gradually, and the speed is accelerated to the maximum value without any adjustment, and the curves become parallel at the limit speed, and reach a constant value at the maximum rotation speed.

After %N steps, the point becomes dotted line B, dotted line, 33c
to slow down and stop.

Regarding dotted line B, is it a curve? The right and left sides of C (parallel to curve 33C) are symmetrical.

If the number of steps N for numerical control is small, the curve? At the rising edge of -, the number of steps is 3AN, so it descends and stops as shown by the dotted line 33a.

If the number of steps is larger than this, dotted line 3.3b
It descends and stops like this.

The step speed control according to the present invention is characterized in that the load is always numerically controlled in the shortest possible time even if the number of steps is changed.

〔effect〕

The first effect is that a stepping motor with a large output torque (and a high rotational speed) can be obtained.

It is possible to increase the step speed without losing the characteristics of the reluctance type, which has a large output torque.

Since the first effect can be obtained by simply adding a second effect diode and a small capacitor to the power supply side, the control circuit is simplified.

Third effect: It is possible to prevent step-out and perform numerical control of the load at maximum speed.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of the device of the present invention, salient poles, and magnetic poles. Figure 2 is a developed diagram of the excitation coil, Figure 2 is its energization control circuit diagram, Figure 3 is a block circuit diagram of a stepping electric signal generator, and Figure 2 is a stepping diagram for numerically controlling the load in the shortest possible time. Electrical signal generation circuit diagram, part! The figure is a graph of the number of pulses and pulse oscillation frequency of the circuit shown in the figure.
FIG. 4 shows time charts of each curve of the stepping electric signal, output torque, and excitation current. /, /a, /b, ... rotor and salient poles, ! ...Rotating shaft, Goosele bearing, /A, /Aa,
/Ab,...fixed armature and magnetic pole, /&a-/,/
Aa-u...teeth/? a, /'7b, - excitation coil, Otsu, Otsu a, Otsusu. ...Cooling fin, 2a, jb, 23...DC power supply voltage negative pole, K, L, M, N, P, Q,, R...Excitation coil, 7a, 7b, -, J'a ,J'b,,29a
, 2? b, -transistor, /3... oscillator, /
q...pulse distributor, 7g...computer,
1.2a1.22b, ko2c...counting circuit, J...
・ROM, u4...D conversion circuit 1.24a, u
4b...Flip-flop circuit, 31...Trigger diode, 31I-...Self-starting frequency curve, ? −
1, 3JFL, 33b, ... pulse oscillation frequency curve,
3! ra. , 7! b , -, , 7, 4a , JAb , -...
,? ? a,37b,-,3ga,,3gb,=-%
1.3a, '13b, ---, #lIa, 41b,
-4(ja, tIjb, ... stepping electric signal curve, 3qa,, 7?b, 3wc-.) torque curve, 9
/a, lI/b, II/Q, l/d... Excitation current curve. Certain 3. Written amendment to the procedure for the Kazu Kazu (self-motivated) dated 3rd August 1999

Claims (3)

[Claims] (1) In an n-phase (n=2, 3, 4, ...) full-wave reluctance stepping motor, an n-phase excitation coil attached to an n-phase magnetic pole, a first, a second, a third ,...
When the excitation coils of the phases are respectively called the first, @first@ excitation coil, the second, @second@ excitation coil, the third, @third@ excitation coil, etc., A semiconductor switching element connected to both ends of each excitation coil, a diode reversely connected to the series connection of each semiconductor switching element and the corresponding excitation coil, and a DC power supply that applies voltage to the excitation coil via the semiconductor switching element. and a first @1st@ excitation coil which is energized via a first backflow prevention diode connected in the forward direction to the positive pole of the DC power supply, and a second, third, etc. The second and @second@ are energized through the backflow prevention diodes of...
An energization control circuit consisting of an excitation coil, a third excitation coil, and so on, an n-phase full-wave stepping electric signal generator of a predetermined frequency, and the stepping electric signal correspond to each other. The first, second, third,...
A reluctance stepping motor characterized by comprising an electric circuit that energizes and conducts a semiconductor switching element connected to an excitation coil of a phase to generate stepping torque. (2) In an n-phase (n=3, 4, 5, ...) single-wave reluctance stepping motor, an n-phase excitation coil attached to an n-phase magnetic pole, a first, a second, a third, The excitation coils of the phases of... are connected to the first, second, third,...
When called an excitation coil, there is a semiconductor switching element connected to both ends of each excitation coil, a diode reversely connected to the series connection of each semiconductor switching element and the corresponding excitation coil, and a semiconductor switching element connected to the excitation coil. A DC power supply that applies voltage to the excitation coil, a first excitation coil that is energized via a first backflow prevention diode connected in the forward direction to the positive pole of the DC power supply, and a second Connected between the second, third, ... excitation coils that are energized through the third, ... backflow prevention diodes, and the output side of each backflow prevention diode and the negative pole side of the DC power supply. 1st, 2nd, 3rd, etc. of small capacity
an energization control circuit consisting of a capacitor; an n-phase single-wave stepping electric signal generator of a predetermined frequency; and a corresponding first and second
, a third, . . . , a reluctance stepping motor comprising an electric circuit that energizes and conducts semiconductor switching elements connected to excitation coils to generate stepping torque. (3) In the scope of either claim (1) or (2), a memory circuit for storing the required number of steps and a first counting circuit are provided with the above-mentioned number of steps; An electric circuit that sets 1/2 of the step number in the second counting circuit, and when the stepping motor is started, subtraction is started in the first and second counting circuits according to the step number, and R
An electric circuit reads out the digital memory stored in the OM and reversely reads out the digital memory in the ROM using the zero count output signal of the second counting circuit; An oscillation circuit that can obtain a proportional oscillation pulse frequency, a pulse distributor that outputs an n-phase full-wave or single-wave stepping electric signal by inputting the frequency of the output oscillation pulse of the oscillation circuit, and a reluctance stepping motor. In response to the drive start command electric signal, input of the output stepping electric signal of the pulse distributor to the energization control circuit of the motor is started, and when the count value of the first counting circuit reaches zero count, the oscillation pulse of the oscillation circuit is 1. A reluctance stepping motor characterized by a stepping electric signal generator comprising an electric circuit that cuts off an input to a pulse distributor.