JP3096231U - Self-excited dynamic brake - Google Patents

Abstract

(57) [Summary] (with correction) [PROBLEMS] To provide a self-excited dynamic braking device that supplies a braking force required by a braking device by electric power generated by a self-excited generating coil and does not require power input from the outside world. SOLUTION: The brake 1 of the present invention includes a first rotor 12, a plurality of permanent magnets installed on an inner peripheral surface of the first rotor, and a stator 2, wherein the stator is inside the first rotor. The stator is housed in the space, and the stator houses the second rotor 31. A plurality of first salient poles 21 are provided on the outer peripheral surface of the stator, and a power generating coil 11 is wound around the first salient poles. A plurality of second salient poles are provided on the inner peripheral surface of the stator, and a braking excitation coil is provided on the second salient pole. The electric power generated by the power generation coil causes the braking excitation coil to rotate with respect to the second rotor 31. Generates braking force.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

  The present invention relates to a kind of self-excited dynamic braking device, in particular a cycling machine or its It is applied to the load power equipment of other similar exercise equipment, and a permanent magnet generator is installed in the equipment. In addition to being used to supply power to panel equipment, it is also used to supply a current load for rotational torque control. The present invention relates to a self-excited dynamic braking device.

[0002]

[Prior art]

  The well-known self-excited dynamic brake is a generator mounted on the wheel axle of a cycling machine. It is composed of a braking device that surrounds the machine, the rectifier, and the generator. People exercising When you step on the pedals and rotate the wheels, the generator produces a current that is rectified. Sent to the exciting coil of the braking device after rectification by A vortex type magnetic braking action is generated for the rotor around the circumference.

[0003]   Such a conventional technique is found in, for example, Patent Document 1, and its basic structure is shown in FIG. As shown in FIG. 10, two of the fixed parts A and B of the generator coil and the braking are shown. The exciting coil is a combination of two different parts. A has a coil a3 housed inside two braking clamps a1 and a2, and is used for braking excitation. The fixed part B of the coil is also fitted inside the two relatively large brake clamps b1 and b2. The composition is such that the b3 is sandwiched therebetween. In addition to the two fixing parts A and B, two times The trochanters C and D are combined and integrated, thus achieving the functions of self-excited power generation and braking. It is supposed to be achieved. The composition of this known structure is wasteful of material and space utilization. Therefore, this article needs further improvement.

[0004]

[Patent Document 1]           US Pat. No. 5,986,370

[0005]

[Problems to be solved by the device]   The above-mentioned known self-excited dynamic braking system includes the two stationary coils and the braking excitation coil. The coil is a combination of two different sets of components, which provides ample material and space utilization. It has the drawback that it cannot be used. Therefore, the main purpose of the present invention is a kind of self-excited To provide an electric brake, of which a generator coil and a braking excitation coil are provided. Are in the same stator, which allows full use of material and space, which reduces manufacturing costs. The burden can be reduced.

[0006]   The next object of the present invention is to provide a kind of self-excited dynamic brake, which is , Of which the size of the generator and the capacity of the brake is the diameter and stack of the silicon steel plate of the stator. The thickness shall be adjusted.

[0007]   Yet another object of the present invention is to provide a kind of self-excited dynamic braking system. It has a braking power compensation function, and when the actual operating temperature of the The control of the power compensation control circuit increases the braking power of the braking device, which controls the braking power. The motor can maintain a certain braking function, and the braking function does not change due to temperature changes. And

[0008]

[Means for Solving the Problems]

  According to a first aspect of the present invention, a first rotor and a plurality of permanent magnets installed on an inner peripheral surface of the first rotor are provided. A permanent magnet and a stator, the stator being housed in the internal space of the first rotor; Self-excited power generation with a gap between the outer peripheral surface of the rotor and the permanent magnet installed on the first rotor In the brake, the inner space of the stator is formed on the inner peripheral surface of the stator, and the second rotor And the second rotor rotates simultaneously with the first rotor, and a plurality of rotors are provided on the outer peripheral surface of the stator. The first salient pole of the stator, and the generator coil is wound around the first salient pole of the stator. A plurality of second salient poles are provided on the surface, and a braking exciting coil is provided on the second salient poles. By the electric power generated by the coil, a braking force for the second rotor is applied to the braking excitation coil. It is a self-excited dynamic braking device that is characterized by being generated.   According to a second aspect of the present invention, in the self-excited dynamic braking device according to the first aspect, the generator coil is provided. Is a single-phase, two-phase, three-phase or four-phase, self-excited dynamic brake and is doing.   According to a third aspect of the present invention, in the self-excited dynamic braking device according to the first aspect, a braking excitation coil is provided. After being wound on the coil frame, the il is mounted on the second salient pole, It is a self-excited dynamic braking device.   According to a fourth aspect of the present invention, in the self-excited dynamic braking device according to the first aspect, the second rotor is provided. A number of die-cast aluminum bars spaced around the inner edge of the The self-excited dynamic braking device is characterized by having a sket.   According to a fifth aspect of the invention, in the self-exciting dynamic braking device according to the first aspect, the braking device is a braking device. A dynamic power compensation control circuit, the braking power compensation control circuit being above the operating temperature of the brake. A self-excited dynamic braking device characterized by compensating for a decrease in braking power due to rising ing.   The invention of claim 6 is the self-excited dynamic braking device according to claim 5, wherein the braking power is Compensation control circuit is temperature sensor, temperature signal amplification circuit, stage number control signal, control signal amplification circuit Path, an adder, a pulse modulation control circuit and a power drive circuit, and the temperature sensor controls When the actual operating temperature of the actuator is detected and the operating temperature of the brake increases, the temperature sensor Detects an increase in temperature and amplifies the signal sent to the adder via the temperature signal amplification circuit. Signal sent from the stage number control signal to the adder via the control signal amplifier circuit Is held unchanged, thus increasing the sum of these signals sent to the adder, From the pulse modulator control circuit and then via the power drive circuit. The drive signal sent to the brake by the brake increases the braking power of the brake, which The brake retains a certain braking function, and the braking function of the brake is modified by the change in temperature. It is a self-excited dynamic braking device that is characterized by not having it.   According to a seventh aspect of the invention, in the self-excited dynamic braking device according to the sixth aspect, the power drive is provided. The circuit comprises a power transistor, the power transistor being mounted on the stator, Self-excited power generation, characterized in that the stator serves as a heat dissipation device for power transistors. It is used as a brake.

[0009]

[Embodiment of device]

  The brake of the present invention comprises a first rotor and a plurality of permanent magnets installed on the inner peripheral surface of the first rotor. A magnet and a stator, the stator being housed in the inner space of the first rotor, It houses the second rotor. A plurality of first salient poles are provided on the outer peripheral surface of the stator, and A generator coil is wound around the first salient pole. A plurality of second salient poles are provided on the inner peripheral surface of the stator. And a braking exciting coil is provided on the second salient pole to increase the power generated by the generating coil. As a result, a braking force for the second rotor is generated in the braking excitation coil.

[0010]   The design of the present invention achieves the function of fully utilizing the material and space of the brake be able to. Also, both the generator coil and the braking excitation coil of the present invention are fixed to the same. Partial structure, sliding contact device (eg conductive slide ring, carbon brush) Does not need to be electrically conductive, so contact failure and contact caused by sliding contact It is possible to prevent defects such as heat generation at the point of contact or wear of the slide portion.

[0011]

【Example】

  Please refer to FIG. 1 to FIG. FIG. 1 is a plan view of a brake of the present invention, and FIG. 2 is a plan view of FIG. A-A sectional view, FIG. 3 is a BB sectional view of FIG. 1, and FIG. 4 is a three-dimensional disassembly of related parts of the present invention. It is a figure.

[0012]   As shown in these figures, the brake 1 of the preferred embodiment of the present invention is It comprises a trochanter 12, which comprises an internal space 12a, which internal space 12a is a rotor ring. It is formed by the body 12b. The rotor ring 12b is cast iron, wrought iron, or cast iron. Formed by steel. The north and south poles are alternated on the inner peripheral surface 12c of the rotor ring 12b. The arranged permanent magnets 13 are fixed. The first rotor 12 has a central shaft post 14 It is driven by the pedal of the cycling machine, and when the exerciser pedals, The shaft column 14 is driven and rotated, which causes the first rotor 12 to rotate.

[0013]   The stator 2 is housed in the internal space 12 a of the first rotor 12. The stator A plurality of first salient poles 21 corresponding to the left and right are provided on the outer peripheral surface of 2, and each first salient pole 21 The groove 21a is formed between the first and the second salient poles 21 so that the magneto-electric coil 11 is wound. .

[0014]   When the first rotor 12 rotates, the magnetic force generated by the permanent magnet 13 of the first rotor 12 The line (magnetic flux) penetrates the air gap between the permanent magnet 13 and the stator 2 and enters the stator 2, The generator coil 11 of the determinator 2 generates electric power by electromagnetic induction. The above-mentioned magneto coil 1 1 is formed in a single-phase (Fig. 5), two-phase (Fig. 6), three-phase or four-phase coil form Yes, but this is determined by need.

[0015]   The braking device 3 is housed in an internal space 2c surrounded by the inner peripheral surface of the stator 2. The braking device 3 comprises a second rotor 31, which is located in the internal space 2c of the stator 2. Place. The second rotor 31 is connected to the central shaft post 14, so that the first rotor is It rotates coaxially with 12.

[0016]   In the portion of the second rotor 31 close to the outer peripheral edge, a plurality of die casters arranged at intervals. An aluminum basket 32 made of strike is provided. Symmetrically with the inner peripheral surface of the stator 2 A second salient pole 22 is provided, and in FIG. 2, four inner poles of the stator 2 correspond to each other. The second salient pole 22 is provided. A groove 22a is formed in the side piece of the second salient pole 22, A braking excitation coil 33 is provided on each second salient pole 22. Installation of braking excitation coil 33 For convenience, first, the braking excitation coil 33 is wound around the coil frame 34. From this, the coil frame 34 is further mounted on the second salient pole 22. In addition to being convenient to stand up, a good insulating effect can be obtained.

[0017]   When an appropriate electric power is supplied to the braking exciting coil 33, the braking exciting coil 33 is excited. It is magnetized to generate a magnetic field, which creates a gap between the second salient pole 22 and the second rotor 31. It penetrates and enters the second rotor 31, and the second rotor 31 is further adjacent to the stator 2. It is folded back from the matching second salient pole 22 and thus a complete magnetic path is formed.   When the above-mentioned first rotor 12 rotates, the magnetic flux in the second rotor 31 also changes. However, this change in magnetic flux causes the aluminum basket 32 in the second rotor 31 to induce an eddy current. Is generated, and this eddy current acts on the line of magnetic force to generate a force in the direction opposite to the rotation of the second rotor 31. And the force in the opposite direction is the so-called braking force.

[0018]   In order to control the magnitude of the braking torque of the braking force, the braking excitation coil of the braking device 3 The current passing through 33 must be controlled. The control method is the generator coil 1 The AC induction power generated by No. 1 is rectified by a well-known rectifier into a direct current and further controlled. It is sent to the braking excitation coil 33 of the braking device 3 by the control of the circuit, and thus the braking excitation coil 33 is excited. By controlling the magnitude of the exciting current sent to the coil 33, the braking torque is increased. Control the degree.

[0019]   In actual application, the amount of electric power generated by the magneto coil 11 of the present invention and the braking device The magnitude of the braking force generated by the device 3 is adjusted by the diameter and the stacking thickness of the stator 2. .

[0020]   The present invention further includes a braking power compensation function, which uses electronic circuit control. When the temperature of the brake rises, the braking power compensation control circuit 4 is used to The braking power of the device is compensated, which allows the braking device of the present invention to maintain a certain braking function. , Prevent alteration due to temperature change.

[0021]   The braking power compensation control circuit 4 of the present invention, as shown in FIG. , Temperature signal amplifier circuit 42, stage number control signal 43, control signal amplifier circuit 44, adder 4 5, a pulse modulation control circuit 46, and a power drive circuit 47. The temperature The sensor 41 is installed at an appropriate position of the brake to detect the actual operating temperature of the brake. However, the stage number control signal 43 comprises a power transistor, which is suitable for the stator 31. Installed in various positions, which makes the stator a heat dissipation device for power transistors. . The heat of the stator is released by the air flow generated when the rotor rotates, Does not accumulate inside.

[0022]   When the brake is used, the braking power of the brake will decrease when the operating temperature rises Therefore, in order to compensate for this lowered braking power, the temperature sensor 41 increases the temperature. When detected, the temperature signal amplification circuit 42 amplifies the temperature signal Sa sent to the adder 45. Then, the original stage number control signal 43 is passed through the control signal amplifier circuit 44. The control signal Sb sent to the adder / adder 45 is kept unchanged, and therefore these two signals Sa , Sb are increased and output through the pulse modulation control circuit 46 for power drive. The braking power of the brake 1 is increased by the drive signal sent from the circuit 47 to the brake 1. .

The braking device 3 of the present invention has a smaller operating area than the conventional braking device that acts on the circumference of the entire rotor (see FIG. 9), but the acting force is the square of the magnetic flux density. In direct proportion (F = KB ² A, of which F is acting force, B is magnetic flux density, A is acting area), a relatively small number of braking exciting coils 33 are excited, and the magnetic flux density B is greatly increased and thereby increased. The braking force outweighs the reduction of the action force due to the reduction of the action area A, and thus such a design of the present invention greatly enhances the economical efficiency, reduces the waste of material, and simplifies the manufacturing, and the labor cost greatly. Can reduce the product quality.

[0024]   Further, both the generator coil 11 and the braking exciting coil 33 of the present invention are used as a stator. Once installed, the conventional sliding contact device (conductive slide ring, carbon brush, etc.) Unnecessary, therefore contact failure caused by sliding contact, contact point heat generation or Has no defects such as abrasion of the slide part.

[0025]

[Effect of device]

  Taken together, the self-excited dynamic brake provided by the present invention has certainly improved its function and Has commercial utility value. The above description limits the scope of the present invention. However, any modification or alteration of details that can be made based on the present invention is not considered. It shall belong to the scope of claims of the proposal.

[Brief description of drawings]

FIG. 1 is a plan view of a brake according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG.

FIG. 4 is an exploded view of related parts of the present invention.

FIG. 5 is a display view of the power generating coil of the present invention in a single-phase coil form.

FIG. 6 is a display view of the power generating coil of the present invention when it has a two-phase coil configuration.

FIG. 7 is an exploded side view of the present invention when the related parts are disassembled.

FIG. 8 is a circuit functional block diagram of a braking power compensation control circuit of the present invention.

FIG. 9 is a side view of a known brake.

10 is an exploded side view of the known brake of FIG. 9. FIG.

[Explanation of symbols]

1 brake 11 generator coil 12 First rotor 12a internal space 12b Rotor ring 12c inner peripheral surface 13 permanent magnet 14 Center column 2 stator 2a outer peripheral surface 2b Inner surface 2c internal space 21 first salient pole 21a groove 22 Second convex pole 22a groove 3 braking device 31 Second rotor 32 aluminum basket 33 Braking excitation coil 34 coil frame 4 Braking power compensation control circuit 41 Temperature sensor 42 Temperature signal amplifier circuit 43-stage control signal 44 Control signal amplifier circuit 45 adder 46 Pulse modulation control circuit 47 power drive circuit

Claims (7)

[Scope of utility model registration request] 1. A first rotor, a plurality of permanent magnets installed on an inner peripheral surface of the first rotor, and a stator, wherein the stator is housed in an internal space of the first rotor, and the stator is provided. In a self-excited dynamic braking device in which there is a gap between the outer peripheral surface of the child and the permanent magnet installed on the first rotor, the inner space of the stator is formed on the inner peripheral surface of the stator, and the second rotation is performed. A second housing, the second rotor rotates simultaneously with the first rotor, a plurality of first salient poles are provided on the outer peripheral surface of the stator, and a generator coil is wound around the first salient poles; A plurality of second projecting poles are provided on the inner peripheral surface of the stator, a braking exciting coil is provided on the second projecting pole, and the braking force for the second rotor is applied to the braking exciting coil by the electric power generated by the generator coil. A self-excited dynamic braking device, characterized in that: 2. The self-excited dynamic braking device according to claim 1, wherein the power generation coils are single-phase, two-phase, three-phase or four-phase. 3. The self-excited dynamic braking device according to claim 1, wherein after the braking exciting coil is wound around the coil frame,
A self-excited dynamic braking device characterized by being installed on the second salient pole. 4. The self-excited dynamic braking device according to claim 1, wherein a plurality of spaced-apart diecast aluminum baskets are provided in a portion near an outer peripheral edge inside the second rotor. A self-excited dynamic brake. 5. The self-excited dynamic braking device according to claim 1, wherein the braking device includes a braking power compensation control circuit, and the braking power compensation control circuit compensates a decrease in braking power due to an increase in operating temperature of the braking device. A self-excited dynamic brake. 6. The self-excited dynamic braking device according to claim 5, wherein the braking power compensation control circuit is a temperature sensor, a temperature signal amplification circuit, a stage number control signal, a control signal amplification circuit, an adder,
A pulse modulation control circuit and a power drive circuit, wherein the temperature sensor detects the actual operating temperature of the brake, and when the operating temperature of the brake rises, the temperature sensor detects the increase in temperature and the temperature signal amplifying circuit The signal sent to the adder via is amplified, the control signal sent from the stage number control signal to the adder via the control signal amplifier circuit is held unchanged, and therefore the sum of these signals sent to the adder is After increasing and being output from the adder via the pulse modulation control circuit, the braking signal of the braking device is increased by the drive signal sent to the braking device via the power driving circuit. The self-excited dynamic braking device is characterized in that the braking function of the braking device is not changed by a change in temperature. 7. The self-excited dynamic braking device according to claim 6, wherein the power driving circuit includes a power transistor, the power transistor is installed in a stator, and the stator serves as a heat dissipation device for the power transistor. And
Self-excited dynamic brake.