JPS5899289A - Driving device for brushless motor - Google Patents

Abstract

PURPOSE:To decrease power comsumption, by feeding back the voltages appeared in a driving coils to an input side of a comparator through an AC feedback circuit, and performing a low frequency switching operation and a high power switching operation. CONSTITUTION:Driving coils 13 and 14 are connected so as to bridge a first switching circuit 300 and a secnd switching circuit 400. Switching transistors 5 and 8 supply power to the driving coils 13 and 14 in a switching mode based on a position detecting signal. Choke coils 4 and 7 and the AC feedback circuit 900 are inserted between the output sides of the transistor 5 and 8 and the input side of a comparator 800 forming a driving circuit. In this way, a switching carrier is generated in the loop of the driving circuit. Then the switching transistors 5 and 8 are made to perform the low frequency switching based on the position detecting signal and the high frequency switching by said switching carrier. Therefore, the consumption power can be reduced by a very simple constitution.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drive device for a brushless motor O, including a position detecting means for detecting the rotational position of a rotor and generating a position detection signal, and a position detecting means for detecting the rotational position of a rotor and generating a position detection signal. I'm in love with the i issue.
l! The distribution path that distributes to the switching threads (often switching transistors) for the purpose of
V-voltage is compared and its specific yield/output is used)-A drive unit equipped with a comparator that controls the conduction of the switching element 041. In the device Il, an attempt is made to generate high-frequency oscillation in the loop circle of the driving pongee to perform high-frequency switching power supply to the recording coil, and to achieve a power dissipation power with a very simple construction. I also have O″C!

I, by the way, the brushless motor@IN- device equipped with the position detection means, the switching element, the m distribution circuit, and the comparator (accurately & is a transistor for comparison) is a USP body 66μm No. 8 or Japanese dance special. IF Kaigan Public Notice Publication Introduction 4wf: Edition 4T80! Publicly known by the number h
) % * mWAwto loop to generate O switching carriers for the iris switch O, and the idea is to generate O switching carriers. Is it publicly known? hiii.

The purpose of this invention is to provide a different method of construction in which the switching carrier generation method proposed by the authors of the present invention is incorporated into the widely known brushless smoke OIK& device.

In addition, li1 ranks first in @0 brushless motors.
The idea is to control the degree of rotation of the brushless motor by causing the transistors that supply switching power to multiple drive coils based on the #j1 output signal to perform on/off operations at a cycle shorter than the cycle of the position detection signal. Japan-
Patent Publication Announcement V 1937! In this document, an on/off signal is generated by a mechanical centrifugal force governor, but this centrifugal force governor is replaced with a semiconductor by a relaxation iscgtiJL4FITL. Te 4! L
ISP II 4GIai141? The Japanese Patent Publication No. 1118@1@ is well known.

However, the f! In both cases, the transistor that performs position detection switching (the position detection signal) is also turned on and off at a high frequency, thereby making it possible to switch between switching and switching the brushless morph. Since the purpose is to vary the current level, a simple configuration is adopted in which an intermittent current is passed through the 1c1 plow coil.

If this is an unpleasant configuration, add an OK1 pile to the drive coil.11
1) If it is set high, a wave wave will be generated from the motor part, and it will be necessary to shield not only the sliding part but also the motor part and the magnetism, and on the other hand, it will be several KHz! If the number of waves applied to the single excitation coil is continued, the single excitation coil will generate damage.

As can be seen from the example of a switching regulator, in order to perform etching power supply to the load and reduce power O, a relatively low 1M wave number (8L) is required.
Although it is preferable to perform switching at 8 to 10 to 10 to 1, the device shown in the original document originally had the purpose of reducing power consumption, or in other words, to perform high-frequency switching at 8 to 10 to 10 IcHIO. Since it is not a permanent product, if you try to increase the switching frequency, an error will occur.

It was. This &0 class device uses a mechanical switch or an independent oscillator as the pericardium to generate the switching signal.
When the koji becomes coarse, it is boiled.

In order to eliminate these o114h, the present invention generates switching carriers in the loop circle of the brushless motor O1IIlIIgj path (therefore, no special oscillator is required), ii[0-range is simplified, and furthermore, Self-sustaining j & station ill! By supplying the driving coil with a round wave that has been converted into a DC-like WL flow by a tachometer, it is possible to realize a device in which the generation of 1!1 tortoise waves from the motor part is eliminated. The derivative effects of the structure of the present invention will be explained in order.

The structure of the present invention will be described below based on the following.

Figure-1 shows a brushless motor according to the embodiment of the present invention.
This is the circuit at Ilft. In 1st article, brushless smoke oiii trochanter (not shown) 〇 - book for detection of dislocation liO - kj & child (1) (2) (2)
The output of is applied to the position detection signal amplifier (100), and the output of 8 phases from the J-coordinated 11 detection signal amplifier (100) is applied to the distribution fi1m (!00).

- H5fsa - Cu coil 0) in the middle, plus the positive power lIc line (g) and the negative ga supply - line g) (- point)
A switching transistor (6>(6)) is connected in series to O, and a switching transistor (8 and 9) is connected to the choke coil (7) in series, and the switching transistor (8 and 9) is connected to the choke coil (7). A switching transistor (b) is connected through the choke coil (4).
), the first switch circuit 11 (Hatake O) is formed by the Uji transistors (5) and (6), and the first switch circuit 11 (Hata O) is configured by the Uji transistor (5) and (6), and the first switch coil (1) and the front (4@O) are configured. 1 s switch circuit (500) by 1.
is embarrassed.

In addition, # and drive coil Sakaki are connected to the drive coil (as if bridging) the switch circuit (800) and the switch path (4.0), and the switch circuit (800) and the switch path (4.0) are connected to ) and the switch circuit (500) 1
The 11cm drive coil member and the drive coil kQ4 are connected, and the ridge movement coil kQ1 and the m movement coil shaft are connected! ! Externally, the connecting midpoint of the Ayan drive coil and the first transistor 〇 reflector are connected to the second drive coil ■, and the Hongki drive coil QL is connected to the so-called star connection. There is.

In addition, a fly nail diode (to) is connected to the collector of the transistor (2) (8) and the il of the negative side feed line axis, respectively, and the transistor (to) of the transistor (m) Collector and minus side supply turtle mil!
−〇@tc is the amount of smoothing condensation --- iii
*I'm exclusive.

Furthermore, the 1wi ditribution cycle & (j!041) 0 upper koji exchange output is applied to Hui Wei Road (6・O), and the 0.
(1@Q) OS@outputs are respectively the transistors (1@Q)
2) (2) Applied to the base of the trout. m-distribution-route (!
@Q) The 0 lower even S phase outputs are applied to the bases of the transistors. tp price list transistor member (2
) - 〇 base is connected to the transistor ■ - Tsuru - 〇 base, respectively, and the trunk star - 〇 engineering 1゜ is connected to the negative - Ronden stock path (to) through the resistor - mm, respectively. However, these O collectors are treated as a common comparator (79G).
l & be done. In addition, a positive electric current is connected through a resistor.
Also, the comparator C'1QQ)
Oj? aE transfer input terminal (Toob) Toph 5 aim
@M- is because the reference voltage line (2) for the voltage limit is not connected.

A comparator (aoo) o Inverting input terminal (Ba1m) is connected to the reversing FIL & voltage input terminal through a resistor. A reference voltage of one wheel is applied to the negative electric line Ho to check the rotational modulus a*O, and the output of the comparator (9) is applied to the gun combination line (...O). It is.

At Hatake 411, the driving carp kQI So-〇Switzday road s
Both lc & t diodes Pm@HOmm-do are connected, and the diode p@wwo cathode is common 11m5#
L,creb()*'/-F and Y 4? # Vertical IEI
The circuit e+eoiscmmm ring is connected, mEjlti
A-ot14 end #Lli live voltage is
4) @) is applied to the inverting input terminal (8.0) of the comparator (80G), and t! The output of the koshi comparator O) and the distribution, ji! Circuit (200
) (The pulse width correction output appearing at the D output terminal (, goop) is also connected to the 0 inversion input terminal of the comparator (Hata 0) (
8001) is occupied by mscntm marked 11LI.

In addition, the m-th AC feedback circuit (In) has a capacitor (to), a resistor-01 line-path, a capacitor exclusively for aIa, and an OIL transfer input terminal ( 800m) and minus Kojikame line axis O! ll
The configuration consists solely of a capacitor w connected to the .

The distribution circuit (400) C) Output terminal (!0@r) and the transistor (1) O-base threshold has a transistor @w.

A @10 current booster made up of a resistor @ is inserted, and a transistor @fe4. is inserted between the Fia output terminal (2041m) and the base of the transistor (2). The 10111th L flow booster i, which is composed of the g resistor 1, is alone, and the jl output signal (!Got) and the 10111L transistor n.

A transistor I1m, a resistor and a #1 paper-only Ichihata Okame & booster are inserted into the base, but these O electric h boosters are connected to Ichiten distribution 11 (j!Go).
This amplifies the 0 output current by a constant magnification.

To Hisashi et al., output terminal C2bfJ of Gekiki Distribution Road (goo)
r) (gQQI) (,!091) and the transistor (
A) (9) QJIZ): Each of the I-rectors O@L is connected to a diode -1lI$-, but these diodes are used to prevent saturation in the above-mentioned transistor failure (2) (2)-〇 small IE vibration region. Therefore, taking the example of the above-mentioned iode, remove the transistor (2) from the 4 strands a II 1 base and 1, and set the pressure to 1 base. When the transponder p8＠O base-emitter voltage has reached '&OK' and the knee voltage of the diode F＠0 (the value minus Kneeve) also tries to become smaller, the υ1 distribution path (which is about to become saturated) 2eQ
) Output terminal (lazy OOO or 6011 volume is bypassed by 6th transistor (6) O collector work (O''c), 1m transistor 〇 base wL line is slightly short.

Full saturation is prevented.

The transistor (the season is relatively small MCTT valley--01
1), when operating in a transistor (mI), the base-emitter t, am pressure and the same collector-emitter ik + jll phase voltage are almost the pure voltage for an increase of 1 wj collector g 0. #i, but as the collector resistance flow increases, the collector resistance becomes large (O), which contributes to the collector-emitter saturation voltage, and becomes large
In the region, the saturation prevention (Kojiwa assembly stop) 1 & 1 operation is not performed by the diode described above, and when the 1L brushless motor is in steady rotation, the saturation of the transistor 0 is prevented by the diode 4. Pig distribution circuit (1
410) to 011MI41 current (not affected by DC electric power output, etc.), smooth switching is performed, and since it requires the most powerful rotation and brushless morph O. Since the diode 41I does not operate during start-up, etc., the booster can be completely saturated, and the booster is represented by the booter, especially in %all-.
m 臘achievement number bar width device (1・O) 1 distribution-route (1@@input combination m step (6...), comparator (700) O-example Jll laziness-0 stone 4 figure, BS Figure shows tin 7 factors.

Easy to operate and does all the essentials. Note that the comparator <rho·) is assumed to have a comparator (7υO) and a -Hitotsuhashi genus.

First, IIImaam rank 5i41 [output signal increase-W (1
00) 0 specific fishing 5isasiia was also ordered,
Kameko ■ is the positive terminal and *b terminal G) is the negative terminal of the aS terminal. Transistor (101) (10ri(
1GJiX104) (106) (1@@) (107) (
1@8), a anti(109) Ka! ty tough
# The ohm pressure path is made up of 111, and the constant voltage output is also supplied to the outside through the satin (1...ah).
118) ttM specified voltage - Jk () constitutes a starting circuit], and when the current pressure is applied again, the current transistor (U) turns off.

On the other hand, transistor (1a4) (1xl
11110 differential excitation increase - narrow path is si 臘please, transistor (
lk! X1!8) (124), resistance (1!1Xla@
) (117) (Igg) (1!9) by the plan! Transistor (18G) (18
1) (iml), ! in (188) (184)
(188) (IH) (18?) increases the movement of seagull 8 #
The kA circuit is configured and - notes, 1110! The force of the Hall element ■O is applied through the i-dynamic increase fIm circuit c4 input terminal (1@@b) and (ffi@@Cm).

The advent of koji! ! The output of the input terminals (10 and d and (100 and 1 and 1 and 1 and 2) is applied to the differential amplifier circuit R, respectively.

The output of the Hall element (2) is applied to the input terminals (l...1m and (1G axis) and the output of the Hall element (2) is applied to the Kojiki@5O1l amplifier circuit. Also, the transistors (111) (114X
) The collectors are all @10 output terminal 0... k ! it) Connected to the output terminals (1...i), the transistors (111) (111) 4D
The collector is connected to the output terminal (1003) of the & Kamei. In addition, the transistor (1@@Xlo Hatake) (
o4) (tg slack) (口・) constitutes the current 蟟う-韩路, and the common base is connected to the reference terminal 00・k) 11i! and the base IE is connected to the external O constant current transistor.
The waterfall supply is configured to be disgusting.

1 hatate - k1 g child U) (2) (2) is - trochanter magnet O - translocation position 1 respectively plow 8-〇 (1 person) (I
A) The unpleasant output voltage waveform shown in (IA) is generated, but
In addition, transistor (116) (18X181
) O collector electric si, &t each plow a @0 (1
1iA) (128AX181A)O (varies. Also, the transistors (116) (524) (10)
xxs
T)'s heresy has its own theory, Figure 8 tv (tgxAXlz
s person) 0 battles) lct# A complete signal waveform appears.

In addition, lIlack 110 No. 1. ! To! , the differential amplification of the gift - the voltage end of the turtle - dyne, each! Theory transistor O emitter ##
It is determined by the resistance inserted exclusively in I, the collector @ 0 load resistance, and the O resistance ratio, but if the width of the curve in (2) (2) in the Neel element increases, the transistor (88) No. 0)
(118) (111) 0:lrector ma waveform and the resistor m (1!

Jk shows 1l1411 wire distribution - foot (8...)O^ physical printing, connection 1, input terminal czoea) (
n@h) (2...i) (ioo3) (g...kx is the position detection signal increase 41!II (looo
) output terminal (IQ/mushi) (10@kX10/1X10
@j) (IQOk) is t&-lol. -In the 4th cabinet,
Transistor (g x) (gos) (goro), resistor (
!・4) (H black) (206), transistor (goτ)
(80 fields) (!l・) constitutes 8 differential switch paths), tigers:, t t)
Phantom (2!IJI) constitutes the s11 dynamic increase mm path.

Therefore, input terminal (3...h) (!III) (!@
・j) d each III S IIO (Hell) (!
DI) (I...J) (These O voltage waveforms are -amIO voltage waveforms (IJIA) (1!Im) (
When the same T number as IIYA) is applied, the current waveform will be 11 output cursor (!Hj) (!・〇−(8・OmX!・・rX!0・LU) (2・・0 will also be applied) are (8...L) (8...M) (8...N) (!@@l
)(!@@5) (1007% shown tm< IC(,!,
&#, It is assumed that an excessive load is connected to the CtL et O output terminals.

Also, transistor (3 lazy?) (!!1lXj!!・)
(!easy・) (all) (181) (151m) (寞84
Human resistance (gas) (zu-in diode-F Cga'l)
41 Input terminal (xeoh) (zoom) (zoojX
When the level of the koji detection signal changes as high as 11, a ripple voltage with a level gradient equal to the C1i conversion gradient is generated. #cjkWhen a suitable load is applied, lI flows past the a41 diode F (1 i)! The storm waveform is as shown in Figure 0 (1...r).

In other words, the input terminal (!0QkX!0Oi) (200j
)42: The level of the applied signal is at the reference voltage terminal C20.
Qa) If the O level is kkm*, then &) 5 n9 OX times O value O emifuta Kamishi flows, but the input terminal (IQOk) (2OQ
i) If the level applied to (H) Oj) becomes lower than the reference voltage terminal <200a) due to O level), the Xt and small current of m transistor <280) will increase, so - The composite collector current of the transistor (S breath V) (1 tuna) 01 reference) is the transistor (lack 01) 0 collector @@aS 8 to the maximum, and the input terminal (S...k) (1
...i) (!00j')r-applied shag pressure wave shadow O improves to a minimum value depending on amplitude.

Therefore, the resistance (186) is 0 resistance fly by Ayuhiro (8 Hatake).
) It is unconstitutional to increase the resistance value Oj times the diode (!
...r), the maximum value is the voltage waveform (
3...II) (1@9IXjaOOJ has a value in the amplitude,
The current O change slope depends on the level slope of the voltage waveform.

Finally, si@ai+ indicates the combined excitation path (...)
■-(...m× are respectively Diagram 4 O-Wiring circuit (engineering...)
The output terminal (!...j) (8.6m) (a-axis) is Il
The input terminal (6...yk is the comparator (lu...
) is applied, the m terminal CaQ axis) (@o@vX
@Q1w) 4tt tL SohflA l jkiO The switching transistor wmuo is attached to the base, and it is connected to the lc and input terminals (6, Ik, side, side, 1, and output terminals <lo, k) for exclusive use of IIA.

Now, Kame 6ml0 Kaiwei-Ro (・O・)OII total is the circle that multiplies the current value flowing out through the input terminal (...y) by 1 by the appropriate magnification <meHtei is am （・・mu）(・
eri (ban/hatake) or resistance (...4) 0 resistance m,
Decided! : is done), input terminal < IQOk) (IQ(1
m) Minutes supplied to (@・0sz)liiiicm6c
Outputs the corresponding output IC storm - child (・O axis) (...Ma) (
・The run testers (6 I) (H
'Constitutes a live transistor, and the engineering of these OF TRAVE transistors is similar to other NPN)
Engineering 1. RIll1II) is also thick (set.

In addition, by narrowing down the turtle Ill, the individual circuit IL# that has been revealed so far is a transformer 9 star (L Hatake) connected to a Zener diode (all except 11 are O small IE61
NPN) Run tester work 1. Assume that the area of each area is equal.

In the II6 OI circuit, the transistor (60 hatake) (
…) (・1・) is the input terminal (6・・jXIoomX@0
(In) is supplied to the drive transistor (...i) (... number) (6, τ) to prevent it from becoming conductive. That is, the maximum value line of the sardine distribution current @49t) The collector current of the constant current transistor (288) is equal to IEIIE, and the collector current of the transistor (j!
Since the collector current m of the transistor (608X@011) (@1G) 011 is equal to the collector current m of the transistor (2!
sosXsxo)

The sieve garden is a comparator (70) or a comparator (S0).
, inverting input terminal (equipped with 7OQax non-inverting input terminal (mar) output terminal (7g1@y)), input terminal (Ding・axis) & 1謬4@t)@路 output terminal (wealth...q) connected to. na l 5iya2otiiro composition nabi cso0
1@krPKz&' is well known, so it's O1!
Lighting is omitted.

Exclusively fM11! In the Io device, the Tei-Takoi factory (
6) @, fly book yield diode F-11 diode $110%, except for the layer pressure synthesis means and the alternating current explosion circuit (SOO), which are composed exclusively of resistors, the 01 work is old. However, there is no major difference from the well-known J50 brushless motor O drive device.

Flywheel diodes have been widely used in the past for the purpose of preventing the switching transistor) ψ) Q from being destroyed due to the surge voltage l caused by the driving coil inductance during switching off. .

However, the pure switching transistor (2) (2)
Cast collector and lower switching transistor (I8)
(2) @ O collector
) Insert the trout and insert the proboscis transistor u)
(717UO Colleta siP et al. fm-Cucoil (
Smell (wa-, said intersection 11111a MII (soo) via Lz te WA & tlAllaot: Me.

The output signal of the drive circuit is connected to the input # of the comparator (8・O), and by subtracting it, the fm comparator (...) 1 synthesis circuit (4oo), the above-mentioned switching transistor @ (2) (2) The drive path constructed by the sensor ζ operates as a -II011111 tether, and the switching circuit 51 is generated in the rm drive circuit'Ok-p circle.

-S961 III Seam Road (90G)! t
j t) In the very low frequency region, the drive circuit 0 output is written to the negative layer j1 and the system is responsible. In addition to distributing the voltage, the generated voltage generated by the i-moving coil o4e4gI is increased by the input shaft of the comparator in the Iitsu loop (-transformation voltage input cylinder 6) by IgJ transfer. It contains a relatively large time constant circuit as shown in Phase Ichide Akoko 4?9L1, etc., and therefore has one input terminal (2).
Generally, the command voltage appearing in fW1-Kukoi, Il&/) has the function of increasing the gain by increasing the lateral delay (in general, the larger the command voltage, the larger the lateral delay).
(To) The voltage phase is selected on the side of the @O drive coil (this occurs because the phase of the current flowing through the drive coil is delayed), and at high frequencies where the O voltage phase across the condenser f@O changes by 18°, A phase difference of ■ degrees occurs between the one-way O output car (upper side switching transistor (2) (2) Ql (1 collector m) and the input false (originally 1B due to the negative layer loop (one degree phase difference has a phase difference of 1 degree) When the phase shift of 018 G degrees is added, the overall phase difference is 1.5 degrees), and high frequency oscillation occurs.

Conveniently, this 14-wave oscillation will continue for a long time if the -40 loop gain is high enough, but if the brushless motor O negative @ 0 increase, etc. has changed greatly.

Input terminal @O level drops and converter/<lator (JX)
When the transistors in the drive circuit, including 0), become saturated, the gain decreases and the frequency carrier stops reaching 0. As a result, the lower switching transistor (on the lower side) becomes lower. As in (2) (to) of switching transistor (2), switching crop rotation is performed using a position detection signal supplied from the distribution circuit (200).

When the brushless load increases, Ig1 trochanter OW
The degree of A transition increases and Tiut++ goes to & and O state.

If the load is exclusively light, the rotor's single turn and direct interruption will rise above the reference value, so Combare 1 (8
The tlJ transistor (00) operates at an operating point close to the cut-off state, but even in this case, the loop gain for one round is sufficient, so high-frequency carriers are generated, and one pure transistor (5) (l(b)41 1iIAA 4-wave switching is performed because it has a very short periodic interval.

In the end, the upper switching transistor (XI) performs high frequency switching operation with a transition period depending on the increase/decrease of the load up to the generated torque of the brushless motor, and a comparator ( 809)01 inrush current waveform and switching transistor (2) He collector current waveform are respectively 111114D(1@・Y)(...@U)(-...
VX...W).

Output terminal (Ip) of 1 distribution circuit <go・)
From this point, the unpleasant current shown in (2...P) in the fl1Mh diagram is sucked out by O, which causes the comparator (Hatatake, 6)
0 output current waveform is changed, and the capacitor m
s@o**c voltage waveform*, 紫sh.

(IImu) (!Omu) (21mu) [As you can see, it has a brutal level change gradient 01? , one can expect smooth rotation with zero trochanters.

Note that in Figure *i, the waveforms indicated by broken lines are at the same Jll as in Figure 8, and are connected to the table element (1) (to) (2) 0.
This is the sign waveform when the output amplitude becomes large.

Based on this promise @O brushless motor 0 drive #lIl&il
The first circuit is a hidden circuit containing an upper switching transistor for distributing the 11411 output fjMv to the drive coil.
Loop Pi″e switch ν C) Because it is made into 4 loops that will give birth to a 44 lap technique carrier, N Oboro's cormorant is the longest 1m
&! Or, without the need for a switching regulator,
Although it is recommended that the filtration process can be carried out easily and easily, as shown in Figure 1, depending on the genus, a number of effects can be expected as listed below. .

First of all, first. By placing choke coils (A) (7) in the switch paths of Kamera and Shizu 8, it is possible to prevent short-circuiting of the lll8-like lK moving coil and failure of the switching transistor O current to Neel element 0**. ξ which prevents S is possible.

In other words, in the embodiment shown in Fig. 1, the brushless motor with multiple phase windings is used, and since the single electric system is used as the stern, the upper switching transistor (2
) and the lower switching transistor temporarily conducts, but the 1F also ◆-kR element failed, the driving coil kt) @ heat etc. caused the Jla film to break and the switching transistor (2) At the same time as in (2), it is possible that excessive IILII & Ichiroto flow.

Continuously lasting overtime! For current #cm, *ii output transistor) one-turn resistance sin' @, reference voltage - width,
IIEm1 constructed by comparator (100)
There is no O''C'@oboro in which the 1@mechanism operates, but since there is a uniformity in the operation for the moderate over-mm, the Soki IIEII11wk mechanism cannot operate, and the The llE filter II @ mechanism does not react at all to an unpleasant accident in which the trunk collector/actuator connection is short-circuited by a foreign object. 7) The risk of damage to the switching transistor due to excessive rush current can be reduced.

Exclusively 蓼ζ, the above-mentioned m is connected to #1f11 Haruka-ro (9υ
・) not only generates high-frequency carriers for switching, but also controls the driving field and, in turn, controls the control characteristics.
You can also make a contribution. In this case, the relatively low frequency components are passed through the capacitor and the resistor, and the high frequency components are passed through the capacitor by short-circuiting the capacitor and the resistor shaft. Since the maximum failure value changes depending on the AC characteristics of the input-child 6) and the W1 continuous punch machine output, etc., it is not possible to determine the exact #C.

fruit! According to IA, capacitor Il (to) osmt
Each U! 7<F,! 0(1@PF, OJ77gF
Good results were obtained. &By the way, the inductance of the hOfM-octopus is 100μH), and the condition of the conduit is 7μF.

In the fruit hook shown in Figure #I1, the voltage at the O-terminal 01 of the cross-tlt feedback circuit (9...) is assumed to be irrelevant to the fluctuations in the source voltage O. ″C1,
Even if the current contains lip k, the capacitor @@-
Therefore, the amount of charge does not change and there is no effect on the FK smooth IjjA rotation of the first rotor.In other words, as can be seen from 111m, the comparator C@@0)
j11! The quasi-voltage 1ste*O crystal unit 1E point) is connected to the negative dull sleep line, and the clay switching transistor (2) is made to perform both high-frequency switching and switching by the position detection signal, and the 1-switching Due to the fact that the transistor) ψ) @ is only switched by the position m output signal, the O voltage across the conductor to4■ @ at the time of switching from Harutomi to jILt7i of the brushless morph does not change @9. On the other hand, the inverting input terminal (8.0) of the comparator (8.0)
O''ci, which is kept constant even at the potential from the negative feed line of 06, and the OIK pressure at both ends of the AC power line (--0) remain constant regardless of fluctuations in the w1#1IIE pressure.

By the way, if the reference potential point of the comparator (Hata・o) o is provided on the plus-feed line &C (plus-feed line connection and the comparator (8・o) op anti-inverting input terminal Hatake・oh) is referenced to og When the voltage -1 is connected), the alternating current directing path (-...) OjimlIO voltage changes in accordance with the change in the ionization voltage O. As a result of the pull, the capacitance amount (total) - 10 charge/discharge will be returned), and the stability of the operation of the plow circuit will be affected.

Also, it's already 1 minute long in figure 1111! Circuit (xH) Ripple voltage with a level gradient tLgL when the level of the detection signal changes at the 0 circle part
Comparator (80G) By applying 0 manual power, switching transistor CM) (2)
Since the signal applied to the cast O base is subjected to PWM modification, the power supply to the drive coil can be switched smoothly, and one rotor can be expected to rotate smoothly.

In the implementation example shown in Figure 11, the upper switching transistor is configured with a PNP type O bipolar transistor, and high frequency switching is performed on this upper switching transistor.
Although the 1-even O switching transistor (6)-@ constructed by bipolar transistors can only perform switching based on the position detection signal, there are some serious problems with this as well.

In other words, &, th*vo As you can see from the explanation of each block O, if the system is made into a monolithic IC, II & points & will be dramatically reduced, and the road characteristics can also be easily summarized. Not only does it improve stability and transportability.

Production costs will also decrease. However, flowing a large stream
Although it is difficult to form PNP bipolar transistors and NPN bipolar transistors on a chip with current technology, this would result in a significant increase in the size of the tubes and tubes, and furthermore, it would require high-frequency switching. In this case, the switching loss increases and the power loss becomes large compared to low-power switching using the first-place detection signal.
It becomes.

In Figure 1 0**, taking into account ξraOc, the semiconductor part and most of the parts except for the silane transistors (5), (6), (b) and the 7 lineal diodes (to) are AiEc is being considered to convert the resistance part into monolithic or IC.

In other words, the lower transistor (where the most current flows)
Even if it is a fake formed on an IC chip.

ξThe O transistors perform on/off operation with a relatively low w4 coefficient), and when the FIU is turned on/off, the active region 1 operates for a short O period (to smooth the IIE style O switching). These O
Extremely low power loss in transistors, #1
For example, when the collector castle is OjA, it is easy to change the on-voltage of the collector emitter station to O, SV & reverse, so even if the upper switching transistor (2)-ring is formed on the launch tube, the thermal resistance tI & O comparison A great IC package (e.g. in-line plastic package in lto2bin0fx7)K? You can create a jin to store the whelks. However, it is difficult to integrate both layers on an IC chip), and a PNP type large IIC transistor (upper switching transistor (2) (2)), which requires good high frequency characteristics. Low operating resistance and low knee voltage (KAee) are essential for efficient power regeneration.
The flywheel diode A4 (b), which is required by Voltage), is constructed from a disk drive component or a separate chip IC, and the part discussed in b is a monolithic I
When converted to C, the general amount of the stem becomes more salt-containing.

In the example, the AC layer return circuit (SOO) is limited to a brushless tatami-tube with an 8-phase winding, and the AC layer return circuit (SOO) is connected to the diode (from the star l7Ii wire to the diode). Although the im drive coil connection may be a delta connection, as shown in *Sa+, the AC layer a circuit (■・0 ) can also be connected at one end, or l
The invention can be applied in exactly the same way to a brushless motor having a two-phase winding shown in Fig. 1sa.

One of the basic aspects of the present invention is that the output comparators of the switching transistors that switch and supply power to the IC coil based on the position detection signal (all comparators constitute the brushless motor 0 drive circuit) By inserting a choke coil and an intersecting tIL116Ilj1 circuit into the 0-person motor #Il, switching carriers are generated in the drive-path O loop.

The idea of having the switching transistor perform low-frequency switching based on the position detection signal and high-frequency switching using the slider can also be applied to the half-wave drive type brushless motor shown in the first paragraph. I can do it.

% 10 switching transistors)
And, by means of logic 10 choke coil ■ and -l driving coil @, -1 series-path (8 y) connected to positive side power supply line CP) and negative s+mw line @0 is constructed.
B, the switching transistor of Tame 8 (2), the lI engineering of M-ku coil (7) and the dynamic coil of Kou 2-1
A simple 2 series circuit (45G) is constructed. Also,
a distribution circuit (1550) that detects the rotational position of a rotor (not shown) using a negative element (1) and distributes the position detection signal to the m* and tmso switching transistors; Comparator (
80G) and a circuit m1 (600) for combining the output of the comparator O and the output of the distribution circuit and applying it to the second switching transistor 11. moreover.

Synthesis circuit (1...w #11 1000
The output voltage is lll1ia: 1 amparator (Hata98) 0
Human power fullz exchange layer difference ■jI (--・・) through layer jl
By making s, - fil, 4j! +Comparison of the position detection signal to the ID switching transistor t8 local switching operation and the correction path (SO)
＾ Gran wave sui, ching movement is performed.

In the 1iroll, the capacitor Q4III connected in parallel with the drive coil (2) is used together with the choke coil k(2) and the choke coil (W) for the purpose of smoothing the high frequency carrier.

Also, in Kame I#, Minute I! - The O machine section amplifies the Hall element <1) 0 output with the differential amplifier sg-1 in the same way as the 111110 position detection signal amplification 11 (t...), and then Output switching transistor (2
) and (2) are supplied with ``C!, 1st switching transistor for half axillary drive.
JlIl of the distribution circuit (lazy/O) that has been neglected
tIji is not required.

In addition, although the switching transistor and each transistor #C are all bipolar transistors in the case, they may also be unipolar transistors or high-power switching transistors. When performing this, a switching transistor (
5) It is also possible to use other switching elements such as a high-interruption ista instead of loop wire #1) (9)-0.

In the above brushless smoke O drive device, the output of the switching element that supplies switching power to the drive coil based on the position detection signal, and the comparator O that constitutes the drive circuit are not included. By inserting an iris coil and an AC monitoring circuit, switching carriers are generated within the loop of the drive circuit.Low frequency switching is performed in the switching element based on a position detection signal;
Since high-frequency switching is performed using the power switch and the switch, the power consumption can be reduced with an extremely simple configuration, resulting in a great effect.

[Brief explanation of drawings]

Fig. 1 is a circuit configuration diagram of a brushless motor drive device according to an embodiment of the present invention, Fig. 2 is a circuit connection diagram showing the position detection side -〇- side. Figure 4 shows the signal waveform diagram of each part in Figures 1 and 14, and Bg and 1τ show the synthesis circuit and the comparator, respectively. −
The diagrams 11jIIIl@, gs diagrams, 龜-shame, and 嬾l diagrams showing fjIm are all circuit configuration diagrams showing other embodiments of the present invention. ni) (υ--chiyoke coil, (5) (8) (b)-switching transistor (1 koji), (6)-) 轡-switching transistor (lower side), (!0@)-distribution foot, ( 8410) (400Xl$@O)-x Ifte circuit, (60.)--Synthesis circuit. (SO・)-Comparator, (I@・)・-AC feedback circuit. (1...O) - Synthetic circuit agent Yoshihiro Morimoto

Claims (1)

[Claims] 1. A first switch circuit having first and second switching elements connected in series to a power supply with a first choke coil interposed therebetween, and 8th connected in series
and a fourth switching element that bridges the switching circuit with the first switch and the fourth switching element. a position detection circuit that detects a position and generates a position detection signal; and a distribution circuit that distributes the position detection signal marked * to the switching elements of the fllxetinz and fMm34. A comparator that compares the rotation command voltage with a reference voltage, and a composite path that combines the output of the comparator and the output of the output circuit O and applies it to the mirror control pin 1 and the 10th switching element. - By passing the gradient 1 voltage applied to the coil to the 11 comparator 0 inputs via the AC layer && 11klb, the 1st and 1st switching elements are provided with a comparative signal based on the position detection signal. Low frequency switching operation. The patented brushless motor drive fc is designed to perform and store high-frequency switching operations based on the first tag path. &lil capacitor and resistor straight tl-path and a second contact f#c connected in parallel to the first series and first path in such a way that the Enki resistor is short-circuited at high frequency to form an AC feedback circuit. The condition of the capacitor in Mayuki Condolence 1 is determined by the above w.
111. The @O brushless motor drive device according to claim 111, wherein the capacitors 0l-Jl) are also set large. L: Set the reference potential point of the comparator and
A 4-toning element is provided on the Wt-type feeder line,
$11# and 11i! By having the switching element No. 4 perform a switching operation based on the position detection signal, the alternating current can be maintained even in response to voltage fluctuations.
A driving device for a brushless rotor according to the patent application, characterized in that the mechanism is arranged so that the turtle pressure does not fluctuate. L 4 scratches 0 in the 1st place 1lIIt#t# inside the distribution circuit
Generates a riffle region pressure with a level gradient dependent on the gradient of change when the level changes.Applying the rift pressure to input #I of the comparator t, ss
The brushless motor O drive device according to claim 118, wherein the signal applied to the O switching element is subjected to PWM modulation. The 1111 switching element connected to the t art, the 1il OP recommended coil, the 1 series path of si consisting of the 1il, and the II Hiroshi O switching element connected to the turtle, and the 1111 switching element connected to the A series circuit of 0 de-coil, @go drive-two coil @S, and rotor 0! ! a distribution path for detecting one position shift and distributing the position detection aI to switching elements of 1 m ml g; a comparator for comparing the reference voltage with the reference voltage; - a synthesis circuit for synthesizing the 'kio output and applying it to the Shonki ml and the Kame 20 sliding cliff; #L synthesis means O output voltage 1 is returned to the comparator O input m via an AC circuit, thereby generating 1 and tIM! ! switching element g: the position detection t
A relatively high frequency switch by s@ was created by Ngu, and -
I hate the fact that I was forced to perform high-frequency switching using the high-frequency switching mechanism. 1 Hirayu layer o@hm and lii in parallel to rin1# and IIzOIIK logic coil, respectively! 0 capacitor with twill wire,
#iKame1. The pressure of the 80 capacitor is tm
So jLil # and m2014<-PK, then we meet, so U, and the ξ that connects, we create a composition means W,
1i11e capacitance, the series circuit of the resistors, and the capacitance of the plow 4 connected in parallel to the series 1g1- in the form of short-circuiting the first resistor in terms of frequency. Configure the aim and determine the condition of the initial condensation fee.
Ii article 40 capacitor's iris) is also man-made (a patent claim characterized by having been set) Brushless motor 0 drive @R0i minute 11j! Located in the 6th city of the garden path By generating a lap #1 IC pressure that stimulates a level gradient depending on the change slope when changing the level 0, and applying a voltage to the input #il of the comparator, 7. The brushless motor drive device according to claim 6, wherein the signal applied to the switching element is subjected to PWM modulation.