JP2939174B2 - Retarder with exciter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a retarder, and more particularly, to a retarder having an exciter capable of supplying sufficient electric power to a field by providing an exciter in the retarder and obtaining a large braking torque. .

[0002]

2. Description of the Related Art As shown in FIGS. 7 and 8, a conventional retarder for obtaining a braking torque using an eddy current has a stator core 2 mounted on a hollow disk-shaped mounting stay 1 having a flange. The coil 3 is wound around the stator core 2. On both end surfaces of the stator core 2, vortex disks 5 fixed to the shaft 4 are provided rotatably through gaps.

When the coil 3 is energized, the stator core 2
Magnetic poles 10 are alternately magnetized to N and S poles, and an eddy current is generated in the rotating eddy current disk 5. The eddy current and the magnetic field generated by the coil 3 are opposite to the direction of rotation of the eddy current disk 5. An electromagnetic force is generated which exerts a braking effect on the rotational movement of the vortex disk 5.

FIGS. 9 and 10 show a conventional retarder using a magnet, in which a magnet 7 fixed to a stator core 6 is used.
Are alternately N poles with respect to the fixed pole piece 8,
It is magnetized to the south pole and is configured to be slidable as shown by the dotted line in FIG. A swirl cylinder 9 is rotatably provided outside the pole piece 8.

When the magnet 7 is at the position shown in FIG. 10, an eddy current is generated in the rotating eddy current cylinder 9 via the pole piece 8, and the eddy current generates the eddy current.
As in the case of FIG. 8, a braking effect is exerted on the rotational movement of the swirl cylinder 9.

When the magnet 7 is at the position shown by the dotted line in FIG. 10, the pole piece 8 blocks the magnetic field of the magnet 7, and an eddy current is generated in the eddy current cylinder 9. Is gone and the brakes are released.

[0007]

When an eddy current is generated in an eddy current plate and a braking force is obtained using the eddy current, the braking torque is proportional to the eddy current loss W. The eddy current loss W increases when the magnetic flux density Bg of the gap, that is, the gap between the magnetic pole 10 of the stator core 2 and the eddy current disk 5 or the gap between the pole piece 8 and the eddy current cylinder 9 is large. To obtain the magnetic flux density Bg of these gaps
Is desirably large.

In the winding type configuration shown in FIGS. 7 and 8 in which the coil 3 is wound, a large braking torque can be obtained by increasing the number of turns of the coil 3. The capacity of the power supply, for example, the alternator and the battery, must be increased, thus increasing the size of the device,
Also, in the magnet type configuration shown in FIGS. 9 and 10, the magnetic flux density Bg in the gap could not be increased as compared with the above-mentioned winding type due to the limitation of the residual magnetic flux density Br of the magnet 7. That is, a sufficient gap magnetic flux density Bg
Is difficult to achieve, and the generation of braking torque is limited. As a premise of the present invention to solve this,
The winding method shown in FIG. 1 to FIG.
Retarders having an exciter of the type are known. This winding
A retarder with an exciter of the type
Requires a battery and a battery for the vehicle.
This puts a burden on the battery, and the capacity of the battery
In some cases, the braking force of the retarder is reduced.
Was. Further, the voltage generated in the exciter is controlled by a control circuit.
Response is poor, and the braking performance is poor
There were drawbacks.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has a structure in which a sufficient power can be supplied to the field of the retarder by providing a magnet type exciter in the retarder to reduce the magnetic flux density Bg of the gap. Large braking torque and a large load on the vehicle battery.
No braking and good braking performance
And its object is to provide a retarder having Kunar exciter.

[0010]

In order to achieve the above object, a retarder having an exciter according to the present invention has a field coil wound around a magnetic pole located on an outer peripheral surface of a fixed field core. In a retarder configured to rotate a cylindrical vortex plate provided at a position facing a magnetic pole and to generate an eddy current in the vortex plate to obtain a braking torque, the field core has a hollow central portion. An exciter armature coil is provided on the inner peripheral surface of the field core, and is provided to face the inside of the exciter armature coil so as to link a certain magnetic flux to the exciter armature coil. a core having a plurality of permanent magnets which generates a voltage in the coil makes the fixed and rotational movement is provided, the core which the plurality of permanent magnets are fixed, the upper
Field core with field coil and exciter armature coil
And the cylindrical swirl plates are sequentially arranged on the same surface in the radial direction.
To control the retarder braking torque immediately.
In order to control the current flowing through the field coil based on the voltage generated in the armature coil of the exciter, a control circuit provided on the field coil side is provided. It is characterized in that it is configured to supply only to the coil.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an explanatory view showing a partial configuration of an embodiment of the present invention, in which an exciter field is wound, FIG. 2 is a longitudinal sectional view of FIG. ing.

In FIGS. 1 and 2, reference numeral 11 denotes a vortex plate;
Denotes a field core, 13 denotes an exciter field core, 14 denotes a field coil, 15 denotes an exciter armature coil, and 16 denotes an exciter field coil.

A winding groove is provided on the outer peripheral surface of the field core 12 fixed to the shaft 4 and on the inner peripheral surface of which the center is formed hollow, and the field coil 14 and the exciter armature coil 15 are provided. Are wound respectively. Field coil 1
A cylindrical eddy current plate 11 is provided at a position facing the magnetic pole of No. 4, and an eddy current is generated in the eddy current plate 11 as described later. An exciter field core 13 with an exciter field coil 16 wound therethrough is provided inside the field core 12 around which the exciter armature coil 15 is wound. Magnetic core 13 and vortex plate 11 and field core 12
Are configured to relatively rotate.

That is, the exciter field core 13 and the vortex plate 1
When the field core 1 is fixed, the field core 12 rotates, and when the field core 12 is fixed, the exciter field core 13 and the vortex plate 11 rotate. Has become.

FIG. 3 shows an embodiment of the corresponding electric circuit shown in FIG.
2, 17 denotes a rectifier, 18 denotes an excitation control circuit, 19 denotes a battery, and 20 denotes a switch.

When the switch 20 is turned on, the battery 19
Then, a predetermined exciting current flows through the exciting machine field coil 16 via the exciting control circuit 18. As a result, a voltage is generated in the exciter armature coil 15, converted to DC by the rectifier 17, and a field current flows through the field coil 14. The magnetic pole 10 on the eddy current plate 11 side of the field core 12 around which the field coil 14 is wound
Are alternately magnetized into N and S poles. As described above, since the field core 12 and the eddy current plate 11 are relatively rotating, an eddy current is generated in the eddy current plate 11, and thus the eddy current is generated by the eddy current. A braking force is generated in a direction for braking the relative rotational movement with respect to the core 12.

The magnitude of this braking force, that is, the braking torque, is controlled by the magnitude of the exciting current flowing through the exciting machine field coil 16 controlled by the exciting control circuit 18, and the switch 20
By turning off the braking torque, the braking torque disappears.

FIG. 4 is an explanatory view of a partial configuration of an embodiment of the present invention in which the field of the exciter is a magnet system. FIG. 5 is a longitudinal sectional view of FIG. 4 and 5, reference numerals 10, 11, 12, 14, and 15 correspond to those in FIGS. 1 and 2, 21 denotes a magnet, and 22 denotes a core.

A magnet 21 is fixed to the core 22.
The core 22 to which the magnet 21 is fixed and the vortex plate 11 are
It is physically fixed to the shaft 4.

That is, the field core 12 is fixed, and the core 22 and the vortex plate 11 are configured to rotate.
I have.

FIG. 6 shows an embodiment of the corresponding electric circuit shown in FIG. 4. Reference numerals 11, 14, 15, and 21 correspond to those shown in FIGS. 4 and 5, and 23 represents a control circuit. I have. The control circuit 23 is a circuit that controls the field current flowing through the field coil 14 based on the voltage generated in the armature coil 15 of the exciter. For example, the control circuit 23 is configured to control the field current with an SCR, For example, a device having a configuration in which the field current is controlled using a DC-DC converter after rectification is used.

Core 22, ie, magnet 21 and field core 1
2, the exciter armature coil 15
Voltage is generated. The voltage generated in the exciter armature coil 15 causes a predetermined field current to flow through the field coil 14 via the control circuit 23 described above. Thus, the magnetic poles 10 of the field core 12 around which the field coil 14 is wound are magnetized alternately to N and S poles. Field core 12
The eddy current plate 11 and the eddy current plate 11 are relatively rotated, so that an eddy current is generated in the eddy current plate 11 and a braking force in a direction for braking the relative rotational motion between the eddy current plate 11 and the field core 12. Occurs. The magnitude of this braking torque is determined by the control circuit 23
Is controlled by the magnitude of the field current flowing through the field coil 14.

[0023]

As described above, according to the present invention, the magnet system is mounted on the same field core as the field coil for generating the eddy current.
And a power source for the field coil, a sufficient field current can be supplied to the field coil, the magnetic flux density Bg in the gap can be increased, and a retarder having a large braking torque can be realized. it can.

Since the exciter is provided in the field core, the size of the device can be reduced. And it is a magnet type exciter
Battery is not required, so the alternator on the vehicle side
And its battery and without burdening the battery
And alternator need not be increased, and its maintenance is easy.
Has good advantages. Since no battery is required,
As in the case of a wire-type exciter,
There is no problem that the braking force of the retarder is reduced,
In addition, it can be disconnected from the power electric circuit on the vehicle side, and the safety is high
Has advantages. In addition, compared to the case of the winding type exciter,
The control circuit controls the AC voltage of the exciter armature coil.
Responsiveness and good braking performance
The rise is better.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a partial configuration of an embodiment in which an exciter field which is a premise of the present invention is a winding method.

FIG. 2 is a longitudinal sectional view of FIG.

FIG. 3 is a diagram showing an embodiment of a corresponding electric circuit shown in FIG. 1;

FIG. 4 is an explanatory view of a partial configuration of an embodiment of an exciter field of a magnet type according to the present invention.

FIG. 5 is a longitudinal sectional view of FIG.

FIG. 6 shows an embodiment of a corresponding electric circuit shown in FIG. 4;

FIG. 7 is a diagram illustrating the configuration of a conventional retarder.

8 is a longitudinal sectional view of FIG.

FIG. 9 is a diagram illustrating another configuration of a conventional retarder.

FIG. 10 is a longitudinal sectional view of FIG. 9;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Magnetic pole 11 Eddy current plate 12 Field core 13 Exciter field core 14 Field coil 15 Exciter armature coil 16 Exciter field coil 21 Magnet 22 Core

Claims (1)

(57) [Claims] 1. A field coil is wound around a magnetic pole located on the outer peripheral surface of a fixed field core, and a cylindrical eddy current plate provided at a position facing the magnetic pole is rotated, so that an eddy current is applied to the eddy current plate. Wherein the field core has a hollow center portion, an exciter armature coil is provided on an inner peripheral surface of the field core, and the exciter armature is provided. A plurality of permanent magnets are provided facing the inside of the coil, and a plurality of permanent magnets that generate a voltage in the exciter armature coil by linking a fixed magnetic flux to the exciter armature coil are provided, and a core that performs rotational motion is provided. A core to which the plurality of permanent magnets are fixed,
Field core provided with an armature coil and an exciter
A cylindrical vortex plate is sequentially arranged on the same surface in the radial direction.In order to immediately control the braking torque of the retarder, the current flowing through the field coil is controlled based on the voltage generated in the armature coil of the exciter. A retarder having an exciter, wherein a control circuit provided on the field coil side is provided to supply the voltage generated in the armature coil of the exciter only to the field coil.