JPS58204792A - Motor drive circuit - Google Patents

Abstract

PURPOSE:To simplify the structure of a motor by controlling three output circuits for driving a motor coil which is connected commonly to one end by signals from two Hall elements for detecting the rotary position of the motor. CONSTITUTION:Two Hall elements 11, 12 which detect the rotor position are provided at an interval of 90 deg. in a brushless motor which has a rotor formed of a permanent magnet 10 and a stator which has coils L11, L12. The output signals are inputted to differential amplifiers 20, 21 and to an arithmetic circuit 22, thereby driving stator coils L11, L12 which are commonly connected at one end through three output circuits 24-26. Accordingly, two transistors which form an output circuit 25 are commonly used, thereby performing the interruption and switching of the current which is flowed to the coils L11, L12, the number of output circuits is reduced as compared with the conventional one, thereby simplifying the integrated circuit IC.

Description

[Detailed description of the invention]

The present invention relates to a motor and a drive circuit suitable for use in rotating a brushless motor. In a magnetic recording/reproducing device such as a tape recorder or a VTR, a DC motor 1 is used to run a magnetic tape. 17' (Even in a record player, a DC motor or a convenient awning is used to drive the turntable rotation. In this way, the DC motor is often used in each AI sub-device, and its operating principle is explained below. 1 will be explained. In @flow motor 1, permanent magnets 2.3 with S pole and N keyaki
Configure the stator r. The armature coil LIX L2 rotates integrally with a rotor (not shown),
Each l111yla is provided at a position that interrogates each other. It is connected to a commutator 4.6 and an f current 5.7. In addition, each commutator 4.5.6.7ri, flange 8.
9. Slidably configured for the n1 brush 8.9 to rs-t
One source area pressure of positive polarity and negative polarity is supplied. In the above-mentioned direct current motor 1 with a strong atmosphere, a @-shaped magnetic field (Radi-al
field) or layer formation. Ryuko 4-7 are brush 8
．． 9 is in the vO position shown in the figure, the flange 8 → the flow element 4 → the coil L, → the commutator 6 → the brush 9, and so on. 1711) As a result, magnetic lines of force are generated from the coil LL. Then, one torque is generated by the interlinkage between the magnetic force caused by the radial magnetic field and the blade η0 generated from the coil L, and σ-Y rotates at the same time. Therefore, as the rotor rotates, the flow path from the commutator 7 to the coil L2 to the rotor 5 is distorted and the electric motor 2 is rotated. As the rotor rotates, a redundant path from the commutator 6 to the coil L1 to the deflection element 4 is formed. Katsuko Katsuko 5 → Coil L2 →
Flow path of adjustment accent 7) Conventional awn n and DC machining 4 or craft n. As mentioned above, as the rotor moves down, the coil L,
and L2, 逼ﾁﾞﾞﾞﾞﾞﾞﾞﾞﾞﾞﾞﾞﾞﾞﾞﾞﾞﾞﾞﾞﾞﾞﾞ1 song (K, J, -i n, te, or rather, it returns to the state shown in the diagram.7) Then, when the pressure of the 4 source area was reached at Bran 8.9, the supply bag was turned into darkness, and the recirculation force was turned on. However, in the DC motor with the above-mentioned 120 mm structure, the brush 8.9 is single-plate, or a single-temperature noise is generated due to spark discharge. For some reason,
At present, brushless DC motors as shown in FIG. 2 are widely used. In other words, the rotor has a permanent magnet lO with increased voltage at the S and N poles, or a fixed feeling n1, and the stator has coils L1□ and L12 fixedly. In addition, a part of the stator near the outer periphery of the rotor is provided with a predetermined gap '1' relative to the upper dαα water magnet υ.
1-'J is the magnet I used to detect the rotational position of the rotor.
A conversion element (for example, a Hall element) is used. Na2
Each Hall element it, t2 is placed at a position where a 1g rock with an electrical angle of 90° is placed.
1.12U is fixed to the stator, so it does not rotate together with the rotor. Get used to the semiconductor nest! 21 Kou IC1u, each Hall element tl, 1
Detection signal outputted from 2 forces (shown in the figure): Therefore, each carp A/L, , , L1□VkoXS! L.U.
rt, ■, ~ engineering. It belongs to Takumi Ding. In addition, Hall ≠ child 11i number 41 and 2 Karanko were followed, and the Imade Nao Saitou/Yuyou circuit 2
Supply to 0. Hall element 12 has 3e and 4th terminal V
When the connection is made, the detection signal is supplied to the Kazutsuru circuit 21. Gangbu circuit 22! ″r1 Output g of each term width circuit 20.21
This is for supplying the fil1 order number to the output circuits 24, 25, 26, and 27 of the next stage. In the output circuits 24 to 27, there is a coil L, a grinding wheel 1 to I4 in L+tz, a permanent magnet IO or a fixed rotor tray @ for stirring the rotating fan. Each output @ path 24
As shown in FIG. 3, it is composed of transistors facing VC21. Of these, coils LLl can be used to create circuits for I accent 1 and 3 r style. The detection 1g of the Hall element 11.12 outputs the control 1g from the logic circuit 22, and the transistor Qt % Q, 4
13" is turned on. This platform, coil L
For ll, follow the bocho arrow mandou with one sword sword. Also, as the rotor rotates, the control signal or output from Logic 22 1 turns on the n1 transistors Q, 2, Q, and 3. In this case, the coil L HH is turned on.
N tjL I l sword) Add to the direction of the arrow indicated by the one-point chain. As the coater a rotates, flow members 1 and 3 mentioned in Fig. 1 flow to the coil Lll.
That means that. Then, in the output circuits 26 and 27b, the IHJ circuit operation is performed for the coil L12. Therefore, as shown in Fig. 2, the motor drive tb@directly connected to U, terminals 5 to 8 are connected to the coils L4, L1□, I current corresponding to the low rotational position = Engineering 1, Engineering 2, Engineering 3, I4'z
＋I can do the same thing as Ryūcho. By the way, each output port @24~27v: L1 zo n zo n 21
By the transistor of the circle! This is due to the fact that the current capacity of each transistor is 7 times smaller than usual.
If n is 0, therefore, in the conventional motor drive device, the transistor tray 81 for upper gripping is also used? Chip size of integrated circuit E process C

[The size is not too large, and this is one of the reasons for the increased cost. Therefore, the eighth object of the present invention is to provide a drive circuit for a motor by removing the output transistor and creating a 44-V voltage. The following is Fukmei? Example 1 of the excitation system for a motor used for 4 motors 4. This will be explained with reference to Figure 1 and Figure 5. In addition, the conventional row and the sub-components that have the same action are given the symbol n+rFti- and the notation τ, and their explanation will be omitted. As is clear from FIG.
It is commonly connected to the 16th shoulder of the connection color of tJfl. The specific capacitance output circuits 24 to 26 are composed of three transistors, and the output circuit 27, which is different from that seen in the conventional series, is layered with two output transistors or 811 fewer transistors. Then, the three output circuits 24
~26id3. According to the control signal from the logic circuit 22 shown in Fig. 5G', the coils Lit, L, □ are connected to...
142 Ronryu Ding also known as Monkey 1. In order to explain the circuit operation of the two logic circuits 22, each input (−evening circuit VC=
, , the code τ lights for each NOR circuit, N L for each NOR circuit, and the code τ light for the VOOR circuit. It depends on the Hall elements 11 and 12 being fixed at a position where the angle is 90 degrees. Therefore, each amplifier circuit 2
Considering the phase of detection and cancellation at tJ, 21, there are the following four modes. (1) The detection of the Hall element 11 is at H level, and the detection of Hall element 12 is at L level. (2) Both Hall elements 11 and 12 are at H level. (3), Hall element 114L level, Hall element I2
→H level (4), Hall elements 11 and 12 are both L level. 7. Then, in the mode (1) above, the high power 1 of the amplifier circuit 20 is
The output signal of the 1-channel circuit 21 becomes H level, and the output signal of the single-pass circuit 21 becomes L level. Below, the logical times mzzhm are formed 'nX Nn, O
The level change of the output fan of R is indicated by H or L, 11→L
, i2→H, L3→H, i4→L. This result N
, -→5, N2→L% N3→LX N, →L. Then, L5→L% N5→H1OR−+f(, I6−+
It becomes H. , l[PIJFh Lance#Q, , ,N
PN h Ranjistaro 4 sword Eon state Ni, 4 pressure level V. Same as 0's power line sword and earth line E, my husband is not Ti! prcL, Katana λ style 几る. Above, in the mode 4c'(2), the amplifier circuits 213, 21
As if the output 1g of both is always at H level, L t -
+LzL2→L113→H, i4→H. As a result, N1→L XN 2→LX N3→H, N4→L. And i 5-+d, N5 →L, OR-+L,
i 6 → fl. d PNP transistor Q3,
NPNh lung system taS is turned on, IES
From the line to the ground line K. In mode (3) above, @AzeI! The output signal of 21 path 20 is L level, and the output level of logic circuit 21 is 7jh H level, so l, -4H, 12→L113→L11
4→■. This box power, N, -+L, N2 → H1
N3→L, N4→L. )-f: then L5→H1N
5→L, OR→L, L6→E. PNP transistor Q3, NF'Nh transistor 0.2 million,
On the mountain, from the 4th line to the ground line E, I made a point 2Ii + Bot DC work 3 or 2 in the forest. In mode 14 above, j-ri 1! l! Circuit 2・], 2
At the output level of 1, the sword that can be used at L level is 1 and 1.
l-4-H 12→HX 13→LX t,→L. As a result, N1 →L%'2→L, N3→I,,,N
,→H. Then, L5→■, N5→H, OR-+H, L6→L. Therefore, the PNPh transistor Q, 5, the NPN transistor Q, and the a sword S are turned on, and can be routed from the 1st line to the ground line E, and the gate line 4 shown by the two-point button line is connected.
C11, Ru. In other words, the above-mentioned motor drive device has a υA frame, an output circuit of 25, and 21 transistors Q, 3, Q, 4.
or shared. And the output of the plane [gl
gutter,? Even though the number of output transistors in A-Hyakucho n-ba 21 is reduced, it is possible to reliably flow flow wires 1 to 4 to coils L, L, and 2 without removing the 71-cart, and the motor's smooth operation is ensured. (rotated) fz＞The above-mentioned fc embodiment ν2, Tojima, which is not shown in a circular shape on Mizuku-Zaneishi 1o.Limited to this shape; Stone 1 o - Monkey-shaped Vc is formed, this 'n'2 o - can be fixed to the outer periphery of the C history, which may be a healthy crawl, and is left behind in the C history V co-hole series, and has a high rate of penetration! 2-
It may be a conventional example of a core VC coil. No matter how many Vζ, if we use a motor configuration device to which the invention is applied, it is possible to reduce the output circuit for driving the motor R, so if we convert it into a circuit. , semiconductor substrate? It can be downsized and reduced to the width of a raw burial cost h'2. Number of photos of integrated circuits on the helmet? There is also the advantage of reducing the

[Brief explanation of the drawing]

The first picture shows the principle behind the direct current motor, and the second picture shows the drive system of a conventional brushless motor. 2I road (
2), Fig. 3 is a Mizuko circuit diagram showing the lg path operation of the output circuit, Fig. 4 is an embodiment of the present invention - a block tie abram directly attached to the JJJA movement of the Mizuko motor, and Fig. 5 is a diagram of the 1o1 top A circuit diagram for explaining the circuit operation is required 10... Permanent magnet, 11, 12... Δ Hall element, 2
1J, 21... Amplification circuit, 22... Single logic circuit, 24
, 25, 20"' output circuit, Lll, L12"' coil, iI-L6... inverter times b, N+ to N5
... Nando tautology, OR... or El %; , Q
l" Q. 6 - Transistor, Engineering 1 ~ Engineering 4...
・I style. Figure 1 Figure 474 - Figure 3

Claims (1)

[Claims] Outputs gn1 and g1 from the first and second magneto-electric conversion elements that output the motor rotational position ft# and the first and second magnetoelectric conversion elements are individually increased. First crane
and a logic circuit that obtains a plurality of controls @1 based on the level difference between the output signals supplied from the second Ryuubi circuit and the first and second Danbu circuits; In response to the above control signal, each of the above-mentioned plurality of output circuits is made up of a pair of perturbation elements which become conductive or non-conducting, and the above-mentioned plurality of output circuits become One end of a plurality of motor coils is commonly connected to the output circuit of one of them.
Fiezan, a pair of rudders that destroy the Deba circuit in 1 above! g
! By the combination of the + element and a pair of steering elements constituting the output circuit of the pond, the current flowing through the motor coil of the above-mentioned number can be connected and switched. A motor drive circuit with special characteristics.