JPH04507328A - Electromagnetic rotation regulator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Electromagnetic rotation regulator Conventional technology The invention starts from a rotary regulator of the type defined in claim 1. Jitsukai 1986 According to Japanese Patent No. 88044, a rotary regulator of the above type is already known. this The rotational regulator has a magnetic return member that controls current to the regulator motor. The shell trochanter of the rotary regulator is brought to a defined rest position when the supply is interrupted. It looks like this. This known return member consists of a permanent magnet fixed to the casing. It consists of two separate permanent magnets coupled to the rotor. this is in rest position Due to the small magnitude of the torque, it produces a relatively small return force. . On the other hand, the maximum torque of the return member acting against the adjustment torque is disadvantageous. big. Furthermore, this requires high costs due to the additional magnets.

Advantages of invention In contrast, the rotary regulator according to the invention having the features set forth in claim 1 provides The components are extremely simple, have a better torque characteristic line, and are inexpensive. It has the advantage of being easy to manufacture.

Another advantage is that assembly is easier, and the emergency operating point can be adjusted while the rotary regulator is assembled. is no longer necessary. Furthermore, the angular tolerances are small enough even for mass production. It will be kept well. Furthermore, the shape of the air gap is changed, and the overlap angle with the permanent magnet is changed. The torque course can be easily optimized depending on the degree of rotation and the thickness of the contour of the return member. Ru.

Depending on the measures described in claim 2 and subsequent claims, the change in the rotation adjuster described in claim 1 may be realized. Examples and improvements are possible.

Brief description of the drawing Next, one embodiment of the invention is shown in the drawings and will be described below. Figure 1 shows the times FIG. 2 is a longitudinal cross-sectional view of the rotation regulator, taken along the line ■-■ in FIG. 1.

Description of examples The rotation regulator 1 has an regulating motor 2 whose rotor acts on a throttle mechanism 3. are doing. The throttle mechanism 3 is a bypass for an intake pipe 5 having a throttle valve. arranged in the conduit 4 for regulating the idling combustion air of the internal combustion engine . The throttle mechanism 3 more or less closes the control opening 6 in the rotary slide tube 4.

The regulating motor 2 consists of a central stator 7 with a magnetic field winding 8 and a bowl-shaped rotor 9. ing. The rotors 9 are arranged on the cylindrical wall of the rotor, facing each other, has two permanent magnets 10 with different polarities. These permanent magnets 10 They are round-shaped, each covering an angular range of about 135@. The rotor 9 has a shaft 11 The shaft 11 is supported with low friction in bearings 13, 14 held in the casing 12. It is accepted. The aperture mechanism 3 is attached to the shaft 11 so as to be relatively unrotatable.

The stator 7 is a casing that covers the rotor 9 and the stator 7 and is connected to the casing 12. It is attached to the single flap 16. The stator 7 is mounted on the shaft 17 with a casing A return member 18 made of ferromagnetic material is held facing the rod 12. therefore The return member 18 cannot be rotated like the stator 7. The return member 18 is a thin disk. It is located in the active range of the permanent magnet segments of the rotor 9. return The member extends in the radial direction to the vicinity of the permanent magnet 10 without contacting the permanent magnet 10. It is growing.

To avoid edge effects, the permanent magnet 10 projects the return member 18 in the axial direction. . The return element can also be arranged on the side of the shaft 17 opposite the casing 12. As shown in FIG. It consists of a central part 19 having a hole 20. The central portions 19 face each other. It has two additional parts 21 extending in a spoke shape. outside of the additional part 21 At the end, in the shape of the wheel rim, there are two corresponding apertures of equal length, oriented laterally and horizontally. The arm 22.23.24.25 extends along a circular line forming the circumferential surface of the return member 18. ing. The two arms 22 and 25 or 24 and 23 respectively cooperate to return The magnetic poles 26 and 27 of the shielding member 18 are formed.

In FIG. 2, the magnetic field lines passing through the magnetic poles 26 and 27 and the permanent magnet 10 are shown by broken lines. ing. The upper permanent magnet 10 forms a magnetic north pole on the inside facing the return member 18 However, the lower segment 10 forms the south pole.

A magnetic south pole is formed at the pole 26 of the return member 18, and a magnetic north pole is formed at the pole 27. is formed. Each type of 26°27 has two arms, and in each type the magnetic field lines are closed. form two systems that are separated from each other. Two arms each 22.25 or For example, there is a spacing of 45@ between 23 and 24, so the automatic movement of arms 22 to 25 is The ends do not touch.

Between the poles 26, 27 the return member 18 has a circular cutout 28, 29 in the direction of the extension 21. have. The width of the notches 28, 29 is approximately 45° each, the magnetic segments A circumferential gap of the same width, facing the notch 28, 29 formed by the It has approximately the same width as the gap 30. The radial width of arms 22 to 25 is small.

That is, the radial width of the arms 22 to 25 was measured in the axial direction of the return member 18. less than the thickness.

The function of the return member 18 is to allow current to flow to the motor 2 that adjusts the rotor and thus the diaphragm mechanism 3. brought to the specified position, i.e. the idling rest position, with no The throttle mechanism in the bypass conduit 4 keeps the emergency operation cross section open. sufficient power to ensure continued operation of the internal combustion engine through this emergency operation cross-section. It's about letting air flow. For this purpose, any operating position of the throttle mechanism 3 is sufficient. A suitable return torque must be applied. At the same time, the maximum value of the return torque is Do not exceed the adjustment torque of the motor.

In the idle position of the rotor, the return member 18 is connected to the magnetic field shown in FIG. It is located at a static point. At this point of rest, the recess 28.2 of the return member 18 9 exactly faces the circumferential gap 30 of the permanent magnet 10.

The torque profile over the rotation angle of the return member 18 is at its maximum compared to conventional rotary regulators. It is flatter in the rest position and steeper in the rest position. Therefore, static The rest position is limited to a narrow angular range of 2″ to 3°. For high accuracy, the gap 30 of the permanent magnet 10 is stationary relative to the notch 28,29. This is achieved by being made to do something. The rest position achieved in this case is interrupted more positive than with an unnotched return member, where the blank pole rests in the center of the magnet. It is certain.

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Claims (8)

[Claims] 1. Electromagnetic rotary regulators, especially throttle cross-sections in conduits conducting the operating medium of internal combustion engines It is an electromagnetic rotation adjuster for controlling the The stator and the rotor are rotatable, and one of the stator and the rotor is opposed to the rotation axis. one having opposite permanent magnets arranged symmetrically with the other having a magnetic field winding; has a magnetically acting non-contact return member, the return member having two oppositely polarized return members; In those types located in the area of the permanent magnet, the return member (18) is non-permanent. two made of magnetic magnetizable material and reaching close to the permanent magnet (10); poles (26, 27), and the poles (26, 27) are arranged around the return member (18). magnetic action of the return member (18) on said permanent magnet (10) arranged in a plane; separated from each other by cutouts (28, 29) that at least weaken the Features an electromagnetic rotation adjuster. 2. The width of the notches (28, 29) in the return member (18) is the same as that of the permanent magnet (10). 2. The rotation adjuster of claim 1, wherein the rotation adjuster has a width approximately equal to the width of the circumferential gap formed therebetween. 3. The return member (18) is a permanent part of the adjusting motor (2) extended for this purpose. The rotational speed according to claim 1 or 2, located in the region of the magnet segment (10). regulator. 4. From claim 1, wherein the return member (18) consists of a disc of reduced axial thickness. The rotation speed regulator according to any one of items 3 to 3. 5. Starting from the radial axis, the return member (18) extends approximately along a circular line 4 two arms (22 to 25), each with two arms (22 and 25) In other words, (23 and 24) form one magnetic pole (26) or (27). The rotation speed regulator according to any one of claims 1 to 4. 6. Claim: The arms (22 to 25) have a small radial dimension. The rotation speed regulator according to any one of items 1 to 5. 7. The field winding (10) and the return member (18) are connected to the stator (7) of the regulating motor (2). ) The rotation speed regulator according to any one of claims 1 to 6, which is arranged in . 8. The rotor (9) of the adjustment motor (2) is configured to surround the stator (7) in a bowl shape. and the permanent magnet segments (10) are arranged on the cylindrical wall of the rotor (9). A rotation speed regulator according to any one of claims 1 to 7.