JPH01126193A - Electrically controlling method for three-phase brushless-motor - Google Patents

Abstract

PURPOSE:To simplify a circuit and enhance stability, by combining the output signal of A- C-phase Hall IC units with power amplifying sections. CONSTITUTION:A-phase - C-phase magnetism formed by utilizing Hall effect elements is detected, and the input of the output signal of A-phase - C-phase Hall IC units 4-6 for taking out the output signal, to a phase inversion circuit via power amplifying sections 7-12 and input terminals 19-24 is provided. Either positive potential input or negative potential input to the phase inversion circuit is provided, and the input of the output, to a power amplifier from a photo-coupler via a digital switch is provided. The power amplifying sections 7 and 8, 9 and 10, 11 and 12 have each phase difference of 180 deg. between them in the output phases, and the phases are combined together, and the power amplifying sections are connected to respective motor coils 1-3. As a result, with the six power amplifying sections 7-12, power can be fed to the threephase motor coils 1-3.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a highly stable electric control circuit for a brushless motor for operating a three-phase brushless motor using a DC power source.

[Conventional technology]

Conventionally, this type of device has had the disadvantage that it requires specialized and skilled engineers for manufacturing, maintenance, and stability because the integration of circuit components has not progressed.

[Problem that the invention seeks to solve]

In order to solve the above-mentioned drawbacks, the present invention realizes integration of the number of parts in one circuit and simplification of the circuit, and enables a highly stable three-phase brushless motor to be realized without the need for skilled engineers. The purpose is to provide an electrical control method.

[Half-immersion to solve problems]

That is, the present invention uses a magnetized magnet whose N-pole and S-pole magnetic fields form a phase angle of 180° in an electric control circuit for operating a three-phase brushless motor using a DC power source.
It is fixed to the rotor side of the motor, and three Hall effect elements are fixed to the field core at positions that form a phase angle of 120'', and the output signals of the three Hall effect elements and the output of the three Hall effect elements are fixed. In combination with the inverse signal of the signal, a 6-position signal is formed with a phase angle of 60', and the 6-position signal is composed of a power amplification section that separately converts the width of the signal, and a control circuit for switching the rotation direction. It is something.

[For production]

By combining the output signals of the A-phase, B-phase, and C-phase Hall ICs 4-5-6 in the power amplification sections 7, 8, 9, 10, 11, and 12, the intermediate point between the A-B-C-A phases is It was possible to create points D-E-F, and it was possible to supply power to three-phase motor coils A-B@C1, numbers 1, 2, and 3 in the figure, using six power amplifiers.

[Example] An example of the present invention shown in the drawings will be described below.

FIG. 1 is a block diagram of the present invention. In the figure, A phase and B phase formed using Hall effect elements are shown.
A for detecting phase and C phase magnetism and extracting the output signal
Phase Hall IC4, B phase Hall IC5, C phase Hall IC6
It is.

The output signal of the Hall IC is inputted to the power amplifying sections 7-12 via input terminals 18-24 and into 34 phase inverting circuits shown in FIG. The phase inversion circuit 34 has a positive potential input 4
The output of the 0 phase inversion circuit 34 that is input to either the 0 or negative potential input 41 is input to the photocoupler 32 via the digital switch 33, and the output is input to the power amplifier 35. We get an output of 100.

The output 100 of the power amplifier 35 is a general term for drawing numbers 13 to 18 shown in FIG. In addition, the power amplification section 7
And 8, 9 and IO1! The phases of the outputs of the power amplifier sections indicated by I and 12 have a phase difference of 180°.

The re-output signals 13 and 14 of the power amplifiers 7 and 8 are combined and
Connect to the motor coil B with a connecting wire 28.

The re-output signals 15 and 16 of the power amplifiers 9 and 10 are combined,
Connect to the motor coil C of No. 3 at [27].

The re-output signals 17 and 18 of the power amplification sections 11-12 are combined and connected to the motor coil A of 1 through a connecting wire 25.

By the above-described connections and operations of the power amplifying sections 7 to 12, the A phase,
There is a phase difference of 120' between the Hall ICs 4-5-6 of the B-phase and C-phase, but there is a 60'' phase difference at the 2f3 position due to the anti-phase operation of the power amplifiers 8-10-12. It is possible to control the power supplied to the motor at the position.The input terminals 18, 21, and 23 of the power amplifier section output in-phase with respect to the input,
Input terminals 20, 22, and 24 have inverted outputs with respect to inputs. 28 is a rotation direction changeover switch, 30 is a positive direction contact,
23 is a reverse rotation contact, which connects the digital switch 33 (disclosed in figure m2) with 2W through the 2W control line 31.
It is connected via the terminal 50 of , and rotates in the reverse direction at ground potential, and rotates in the forward direction at positive potential.

Fig. 2 shows the configuration of the internal circuit of the power amplification section, and input terminals 40 and 41 are connected to direct input to 40,
An input for inversion is input to 41. 34 is a phase inversion circuit, and a digital switch 33 changes the motor rotation direction. Reference numeral 35 denotes power amplifiers, and there are six power amplifiers, TRI to TR6, each of which is attached to the six power amplifier units 7 to 12 shown in FIG. 1
00 indicates the output terminal of the power amplifier.

Next, the operation of the final stage transistors Tri to Tr6 of the power amplifiers TRI to TR6 of the power amplifier sections 7 to 12 and the Hall I
Table 1 shows the relationship between the operations of C.

In the table, the number 1 indicates the ON state and 0 indicates the OFF state.

Table 1 is rotated counterclockwise.

(Table 1) Next, Table 2 shows the above-mentioned state when rotated clockwise.

(Table 2) Next, we will explain Figures 3 and 4. Figure 3 shows the motor coils A, B, and C for the operating state 61 of each Hall IC when the motor rotates counterclockwise. Inside,
Drawing number 62 shows the direction and vector amount of the current flowing in the two-phase coils to AB, BC, and AC, and drawing number 63° shows the rotation direction in the vector amount applied to the rotor of the brushless motor with respect to the coil current. Figure 4 shows the operation of each Hall IC when the motor rotates clockwise! ! 7A 71 shows a state 72 in which current flows to motor coils A, B, and C, and a rotation direction 73 of the motor.

Next, FIGS. 5 and 6 will be explained.

80 and 81 are the N and S poles fixed to the rotor side of the motor.
The poles 4, 5, and 6 indicate the fixed positions of the A-phase, B-phase', and C-phase Hall ICs fixed to the field core, and 1
83, 84, and 85 shown in both figures are at the position D@E-F, where D is the inverted signal of C and has a phase difference of 18°, and E is the inverted signal of A. 180'
There is a phase difference, and F is an inverted signal of B and has a 180' phase difference. Follow, A = D -B -E -C-F -
A (7) The phase difference between adjacent codes is 2π/6, which is 60″
Therefore, the D@E-F point is in the same state as if the magnetic detection of the Hall IC was being performed.

〔Effect of the invention〕

This is because the present invention is configured as described above.

Since each part cannot be assembled in high concentration, the circuit assembly:
It is easy to adjust and maintain, and it is a highly stable product, so it does not require skilled personnel. Also, the present invention is brushless, does not generate unnecessary radio waves, and the power supply is 100 VDC.
'rr! Since the motor uses a power source, it can be converted to -degree DC even in areas with poor commercial power supply conditions, so it has the effect of being used over a wide range of applications as a motor for precision measuring instruments and OA equipment.

[Brief explanation of the drawing]

The drawings show one embodiment of the electrical control method for a three-phase brushless motor according to the present invention. FIG. 1 is a block diagram, FIG.
Figures 5 and 4 show the Hall IC, motor coil current, and operating conditions, and Figures 5 and ff16 show the relationship between the rotor magnetic poles and the ball IC. 4, 5, 6---Hall IC17 to 12---power amplification section, 2nd-m-rotation direction changeover switch, 32-11 food coupler, 33-m-digital switch, 34-m-phase inversion circuit, 35-11 Power intensifier. Patent applicant: Toyo Kinzoku Co., Ltd. Figure 3 Figure 4 Figure 5 Figure 6

Claims (2)

[Claims] (1) In an electric control circuit for operating a three-phase brushless motor using a DC power supply, the magnetic fields of the north and south poles are 18
A magnetized magnet that forms a phase angle of 0° is fixed to the rotor side of the motor, and three Hall effect elements are fixed to the field core side at positions that form a phase angle of 120°. a power amplification section that forms a six-position signal with a phase angle of 60° by combining the output signal of the output signal and an inverse signal of the output signal of the three Hall effect elements, and separately amplifies the six-position signal; An electrical control method for a three-phase brushless motor, comprising a control circuit for switching rotation direction. (2) The electrical control method for a three-phase brushless motor according to claim 1, wherein a photocoupler is interposed at the interface between the Hall effect element output signal and the amplifying section.