CN201315525Y

CN201315525Y - Signal acquiring and controlling device for low-speed motor

Info

Publication number: CN201315525Y
Application number: CNU2008203028225U
Authority: CN
Inventors: 张泽洪
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-11-18
Filing date: 2008-11-18
Publication date: 2009-09-23
Anticipated expiration: 2018-11-18

Abstract

The utility model discloses a signal acquiring and controlling device used for a low-speed motor, which comprises a motor shaft, a motor rotor and a motor outer-shell. At least one magnetic ring is arranged on the motor shaft outside the motor rotor; magnetic bodies arrayed at intervals between a south pole and a north pole are arranged on the periphery of a radial cross section of the magnetic ring; and at least one Hall element relatively fixed on the motor outer-shell is arranged relatively to the magnetic bodies at a distance. The utility model has the advantages of low manufacturing cost, the realization for precise control and accurate positioning on the motor, strong environmental adaptability, small volume, high reliability, stable output signals, high performance price ratio and the like. In addition, stick-slip phenomenon of the low-speed motor during the transmission, namely the motor crawling problem, can also be well solved, and the signal acquiring and controlling device can be widely used in the occasions needing accurate control and low speed drive to the angular displacement of the motor, such as radar systems, servo systems, electrical doors and windows, automotive window-wipers, hoisters, numerical control machines and the like.

Description

The signals collecting of slowspeed machine and control device

Technical field

The utility model relates to a kind of signals collecting and control device of signals collecting and control device, especially slowspeed machine of motor.

Background technology

At present, in normal circumstances, the signals collecting of slowspeed machine is to lean against on the output shaft of motor optical pulse generator, photoelectric encoder etc. to be installed as signal source output with control, or utilizes the magnetic of motor that number of poles and corresponding with it Hall element are used as driving and signal source output.When adopting optical pulse generator, photoelectric encoder etc. as signal source output, because the price of optical pulse generator, photoelectric encoder etc. is higher, also complexity is installed in existence simultaneously, installation requirement is high, volume is big, environment for use is required high deficiency, especially dust, water and greasy dirt etc. are very big to the influence of optical pulse generator, photoelectric encoder etc., also can cause its inefficacy, breaking-up when serious, thereby its use cost height, it is unreliable to move; And the magnetic that utilizes motor is to number of poles with corresponding with it Hall element is used as driving and during signal source output, because the main effect of Hall element is in order to commutate as motor-driven, the number of its Hall element is relevant to number of poles with the magnetic of motor, thereby the limited amount of the Hall element that can be provided with, the signal number wretched insufficiency of its output has influenced the accurate control to motor greatly.As being 6 low-speed brushless motors to number of poles to the utmost point for magnetic, the number of the Hall element of drive motors is 3, when using this Hall element to be used as to drive with the shared signal source of output signal, motor turns around, can only obtain 36 output pulse signals, thereby its output signal as the control motor can not make the motor accurate in locating very little.

The utility model content

Higher for the signals collecting that overcomes existing slowspeed machine with the employed signal source price of control, to environment for use require high, operation is unreliable or the signal number of output very little thereby can not make that the deficiency of motor accurate in locating, the utility model provide that a kind of environmental suitability is strong, low price, can provide the signals collecting and the control device of the slowspeed machine that enough output control signal accurately locatees slowspeed machine.

The technical scheme that its technical problem that solves the utility model adopts is: the signals collecting of slowspeed machine and control device, comprise motor shaft, rotor and motor housing, motor shaft beyond the described rotor is provided with at least one magnet ring, the periphery of the radial section of magnet ring is provided with the spaced magnet of south poles, at least one and the relatively-stationary Hall element of motor housing and magnet positioned opposite and be separated with distance.

The beneficial effects of the utility model are, owing to adopted magnet ring be set on motor shaft, utilize on the magnet ring magnet and with it the Hall element of positioned opposite as the mode of signal source output, not only reduced the cost of manufacture of signal source output, can also on magnet ring, be provided with simultaneously a plurality of as required to the magnet of the utmost point and the Hall element of a plurality of positioned opposite with it, thereby can increase the quantity of signal output as required, make things convenient for Electric Machine Control and realization are accurately located.Simultaneously, Hall element is compared with optical pulse generator, photoelectric encoder etc., have also that environmental suitability is strong, volume is little, less demanding and insensitive to environment for use to the interference effect in temperature, humidity, dust, water, greasy dirt, electric field, magnetic field etc., thereby reliability height, stable output signal, cost performance advantages of higher.Because its volume is little, above-mentioned magnet ring and Hall element can also be installed in the motor, thereby further facilitate use, has improved the adaptability of environment and the reliability of work.In addition, use the mode of above-mentioned signal source output, can also well solve the stick-slip vibration (STICK-STIP) of slowspeed machine in transmission is the motor crawling problems.The utility model can be widely used in the occasion that need are accurately controlled and driven at a slow speed the angular displacement of motor, as: radar system, servomechanism, Electrically operated gate, automobile wiper device, hoist engine, electrically driven curtain, Digit Control Machine Tool etc.

Description of drawings

Fig. 1 is structure of the present utility model and arranges schematic diagram.

Fig. 2 is the cutaway view of the utility model Fig. 1 along A-A direction.

Embodiment

Below in conjunction with drawings and Examples the utility model is further specified.

As shown in Figure 1 and Figure 2, the signals collecting of slowspeed machine of the present utility model and control device comprise motor shaft 1, rotor 6 and motor housing 4.Motor shaft 1 beyond the described rotor 6 is provided with at least one magnet ring 2, and magnet ring 2 is fixedlyed connected with motor shaft 1.The periphery of the radial section of magnet ring 2 is provided with the spaced magnet 3 of south poles, at least one Hall element 5 and magnet 3 positioned opposite and be separated with distance, and this distance is pressed the installation specification of Hall element and is determined.As shown in Figure 2, the South Pole represents that with S the arctic is represented with N.Hall element 5 is fixed on the circuit board, circuit board and motor housing 4 relative fixed.Described magnet ring 2 can be an integrative-structure with magnet 3, promptly directly magnetizes on magnet ring 2 and forms the spaced magnet 3 of south poles; Also the magnet 3 that forms to magnetize can be spaced and be fixed on the periphery of magnet ring 2 radial sections with south poles.Described magnet ring 2 and Hall element 5 can be arranged on the front end or the end of the motor shaft 1 beyond the motor housing 4, also can be arranged on motor housing 4 with interior position near rotor 6.Motor housing 4 described herein is meant the housing parts of the whole motor that comprises end cap.In order to have further facilitated use, improved the adaptability of environment and the reliability of work, and the influence that prevents dust, water and greasy dirt etc., preferably magnet ring 2 and Hall element 5 are arranged in the motor housing 4.If need the number of signals of the output of greater number, magnet ring 2 can also be set to stacked polylith mutually, keep at a certain distance away between the adjacent magnet ring 2, the relative position place of the magnet 3 on each layer magnet ring 2 is provided with one or more spaced Hall elements, makes the number of output signal be multiplied.When motor rotates, by the coupling between Hall element 5 and the magnet 3, produce the pulse signal of reflection motor rotational displacement, be used for motor is controlled and accurate location.

Embodiment: as shown in Figure 1 and Figure 2, the signals collecting of slowspeed machine of the present utility model and control device comprise motor shaft 1, rotor 6 and motor housing 4.Be provided with magnet ring 2 at motor housing 4 with the end of interior motor shaft 1 near rotor 6, magnet ring 2 is fixedlyed connected with motor shaft 1.The periphery of the radial section of magnet ring 2 adopts the mode that magnetizes, form spaced 16 the magnets 3 of south poles to the utmost point (totally 64 of the South Pole and the arctic), 3 Hall elements 5 and magnet 3 positioned opposite and be separated with distance stagger 7.5 ° mutually along the motor gyratory directions between the Hall element 5.Hall element 5 is fixed on the circuit board, circuit board and motor housing 4 relative fixed.When motor revolves when turning around, by the coupling between Hall element 5 and the magnet 3, produce 192 pulse signals of reflection motor rotational displacement, can control and accurate location motor.

Claims

1, the signals collecting of slowspeed machine and control device, comprise motor shaft (1), rotor (6) and motor housing (4), it is characterized in that: described rotor (6) motor shaft (1) in addition is provided with at least one magnet ring (2), the periphery of the radial section of magnet ring (2) is provided with the spaced magnet of south poles (3), at least one and the relatively-stationary Hall element of motor housing (4) (5) and magnet (3) positioned opposite and be separated with distance.

2, the signals collecting of slowspeed machine as claimed in claim 1 and control device is characterized in that: described magnet ring (2) is structure as a whole with magnet (3).

3, the signals collecting of slowspeed machine as claimed in claim 1 and control device is characterized in that: described magnet ring (2) and Hall element (5) are arranged in the motor housing (4).

4, the signals collecting of slowspeed machine as claimed in claim 3 and control device is characterized in that: described magnet ring (2) and Hall element (5) are arranged on the front end or the end of motor shaft (1).

5, as the signals collecting and the control device of claim 1,2,3 or 4 described slowspeed machines, it is characterized in that: described magnet ring (2) is for mutual stacked polylith, and is gapped between the adjacent magnet ring (2).