Passive rotational speed detection motor

Abstract

The utility model discloses a kind of passive rotating speed detection motor, it relates to intelligent detection and control technical field, to solve the problem that will appear in existing passive rotating speed detection, under low speed, the power supply power of circuit is insufficient, influence detection carries out problem, its technical scheme main point is including rotating shaft, the outside of rotating shaft is provided with metal shell, the inside fixedly connected with coil of metal shell, the inside of metal shell is located the outside of rotating shaft and is provided with positioning gyro wheel, the outside fixedly connected with circuit board of metal shell, the outside of metal shell is provided with lead-out wire, the outside of rotating shaft is located and is provided with isolating diaphragm and metal cover plate in one end close to metal shell, the outside of rotating shaft is located and is provided with same metal cover plate in another end close to metal shell, the inside of metal shell is inserted with long screw. Reached the effect of improving power supply coil output power.

Description

Technical Field

[0001] This utility model relates to the field of intelligent detection and control technology, and in particular to a passive speed detection motor. Background Technology

[0002] Passive speed detection primarily relies on the output signal from the coil of the following motor, which is then processed by a rectifier, filter, and voltage regulator circuit to become a stable power supply. Commercially available speed detection motors have two sets of coil wire outputs: one for powering the signal processing circuit, and the other for providing the pulse signal for speed detection. Both sets of coils have identical electrical parameters, including the wire diameter and number of turns. Since the power supply for the passive speed detection circuit is provided by the coil of the following motor, when the tested motor rotates, it drives the following motor to rotate, converting the kinetic energy of rotation into electrical energy. After processing by the rectifier and filter circuit, and then regulated by the voltage regulator circuit, a stable and reliable power supply is formed. At low speeds, the electrical output from the motor coil cannot meet the minimum requirements of the signal processing circuit. Therefore, the circuit can only operate normally and display the speed value after a certain speed is reached.

[0003] The existing technical solutions mentioned above have the following drawbacks: In the existing passive speed detection, the circuit power supply is insufficient at low speeds, which affects the detection process. Utility Model Content

[0004] The purpose of this invention is to provide a passive speed detection motor.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A passive speed detection motor includes a rotating shaft, a metal housing on the outer side of the rotating shaft, a coil fixedly connected to the inner side of the metal housing, a positioning roller located inside the metal housing on the outer side of the rotating shaft, a circuit board fixedly connected to the outer side of the metal housing, and lead wires on the outer side of the metal housing. The power supply to the coil is increased from 2000 turns to 2520 turns, and the wire diameter is increased to 0.22mm.

[0006] By adopting the above technical solution, the rotating shaft is connected to the workpiece under test, and the shaft rotates at the same speed as the workpiece under test rotates. Coil: Multiple coils convert the energy generated during the rotation of the rotating shaft into electrical energy in the coil, providing power and pulse signals for the signal conversion circuit; Metal casing: used to fix the coil assembly and provide support; Positioning rollers: used to fix the rotating shaft and prevent it from shaking; Circuit board: Used to fix multiple sets of enameled wire ends and to connect multiple sets of coils in series; Lead wires: The coil is led out through lead wires and connected to the signal processing circuit.

[0007] Furthermore, an isolation diaphragm and a metal cover are provided on the outer side of the rotating shaft near the metal casing, and the same metal cover is provided on the other side of the rotating shaft near the metal casing. Long screws are inserted into the inside of the metal casing.

[0008] By adopting the above technical solution, the isolation diaphragm provides electrical isolation between the metal cover plate and the circuit board; the metal cover plate is used to fix the main structure of the motor; and long screws fix the metal cover plate, the metal shell, and the isolation diaphragm together.

[0009] Furthermore, there are two positioning rollers and two metal cover plates, eight sets of coils are evenly distributed in a ring, the positioning rollers are placed at the center of the metal shell, and the center line of the rotating shaft and the center line of the positioning rollers are located on the same horizontal center line.

[0010] By adopting the above technical solutions, and by increasing the number of coil turns and reducing the coil internal resistance, the coil output power can be increased, and the power supply power and stability can be improved.

[0011] Furthermore, four long screws are evenly spaced in a ring. The long screws pass through one of the metal cover plates, the metal shell, and the isolation diaphragm, extend into the interior of another metal cover plate, and are threadedly connected to the other metal cover plate.

[0012] By adopting the above technical solution, these parts can be better assembled and installed using long screws.

[0013] In summary, the beneficial technical effects of this utility model are as follows: 1. By adjusting the ratio of the two sets of coils, the number of turns of the pulse supply coil is reduced, and the number of turns of the power supply coil is increased, thereby increasing the coil output voltage and output power; 2. Reduce the internal resistance of the power supply coil, increase the coil output power, change the turns ratio of the two sets of coils, and change the internal resistance of the power supply coil to increase the power output of the power supply and improve the power supply capability at low speeds. Attached Figure Description

[0014] Figure 1 This is a schematic cross-sectional view of the present invention. Figure 1 ; Figure 2 This is a schematic cross-sectional view of the present invention. Figure 2 .

[0015] In the diagram, 1 is the rotating shaft; 2 is the metal cover plate; 3 is the positioning roller; 4 is the isolation diaphragm; 5 is the circuit board; 6 is the lead wire; 7 is the metal casing; 8 is the coil; and 9 is the long screw. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to the accompanying drawings.

[0017] Reference Figure 1-2 A passive speed detection motor includes a rotating shaft 1, a metal casing 7 on the outer side of the rotating shaft 1, a coil 8 fixedly connected to the inner side of the metal casing 7, a positioning roller 3 located inside the metal casing 7 on the outer side of the rotating shaft 1, a circuit board 5 fixedly connected to the outer side of the metal casing 7, and lead wires 6 located on the outer side of the metal casing 7. An isolation diaphragm 4 and a metal cover plate 2 are located on one end of the outer side of the rotating shaft 1 near the metal casing 7, and the same metal cover plate 2 is located on the other end of the outer side of the rotating shaft 1 near the metal casing 7. A long screw 9 is inserted into the inside of the metal casing 7. The rotating shaft 1 connects to the workpiece being measured, and rotates at a constant speed as the workpiece rotates. Multiple coils 8 connect the rotating shaft... The energy generated during the rotation process is converted into electrical energy in coil 8, providing power and pulse signals to the signal conversion circuit. The power supply to coil 8 is increased from 2000 turns to 2520 turns, and the wire diameter is increased to 0.22mm. Metal shell 7: used to fix the coil group and provide support. Positioning roller 3: used to fix the rotating shaft 1 and prevent the rotating shaft 1 from shaking. Circuit board 5: used to fix multiple sets of enameled wire ends and to connect multiple sets of coils in series. Lead wire 6: leads out coil 8 through lead wire 6 and connects to the signal processing circuit. Isolation diaphragm 4: electrically isolates metal cover plate 2 from circuit board 5. Metal cover plate 2: used to fix the main structure of the motor. Long screw 9 fixes metal cover plate 2, metal shell 7 and isolation diaphragm 4 together.

[0018] like Figure 1-2 As shown, there are two positioning rollers 3 and two metal cover plates 2. There are eight sets of coils 8 evenly spaced in a ring. The positioning rollers 3 are located at the center of the metal housing 7. The center line of the rotating shaft 1 and the center line of the positioning rollers 3 are on the same horizontal center line. There are four long screws 9 evenly spaced in a ring. The long screws 9 pass through one metal cover plate 2, the metal housing 7 and the isolation diaphragm 4, extend into the interior of another metal cover plate 2 and are threadedly connected to the other metal cover plate 2.

[0019] The implementation principle of this embodiment is as follows: the pulse supply coil 8 can provide speed pulse signals. The number of turns of the power supply coil 8 is increased from 2000 to 2520, which increases the starting voltage and power. The wire diameter is increased to 0.22mm, which reduces the internal resistance of the coil 8 and increases the output power. Other methods, such as increasing the number of turns of the coil 8 and reducing the internal resistance of the coil 8, can increase the output power of the coil 8, improve the power supply power and power supply stability. Increasing the number of turns of the coil 8 increases the output voltage and output power of the coil 8, and the output voltage value is significantly increased. Reducing the internal resistance of the coil 8 increases the output power of the coil 8. It can reduce the starting rotation of the passive motor speed detection, for example, reducing the digital tube to display at 250 rpm instead of 300 rpm.

[0020] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A passive speed detection motor, comprising a rotating shaft (1), characterized in that: A metal shell (7) is provided on the outside of the rotating shaft (1). A coil (8) is fixedly connected to the inside of the metal shell (7). A positioning roller (3) is provided inside the metal shell (7) on the outside of the rotating shaft (1). A circuit board (5) is fixedly connected to the outside of the metal shell (7). A lead wire (6) is provided on the outside of the metal shell (7). The power supply coil (8) is increased from 2000 turns to 2520 turns and the wire diameter is increased to 0.22mm.

2. The passive speed detection motor according to claim 1, characterized in that: An isolation diaphragm (4) and a metal cover plate (2) are provided on the outer side of the rotating shaft (1) near the metal shell (7), and the same metal cover plate (2) is provided on the other side of the rotating shaft (1) near the metal shell (7). A long screw (9) is inserted into the inside of the metal shell (7).

3. The passive speed detection motor according to claim 2, characterized in that: The positioning roller (3) and the metal cover plate (2) are provided in twos respectively. The coil (8) is distributed in eight groups at equal intervals in a ring. The positioning roller (3) is placed at the center of the metal shell (7). The center line of the rotating shaft (1) and the center line of the positioning roller (3) are located on the same horizontal center line.

4. The passive speed detection motor according to claim 3, characterized in that: The long screws (9) are distributed in a ring at equal intervals. The long screws (9) pass through one of the metal cover plates (2), the metal shell (7) and the isolation diaphragm (4), extend into the interior of another metal cover plate (2) and are threadedly connected to the other metal cover plate (2).

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