CN218062744U - Linear driver with rotating speed feedback and closed-loop heat dissipation control functions - Google Patents

Abstract

The utility model relates to a technical field of linear drive ware, especially, relate to a linear drive ware with rotational speed feedback and closed loop heat dissipation control function, it is including installing the fan a at the air intake, install the fin on one side shell of linear drive ware, set up fan b on fan a's the wind channel, fan a can drive fan b during normal operation and rotate with certain rotational speed, the real-time radiating effect can be monitored to the rotational speed through monitoring fan b, fan b can start when fan a trouble as redundant fan, fan b connection director, the controller is used for gathering fan b's rotational speed signal and does the comparison with benchmark rotational speed signal, judge cooling system's real-time status, then confirm whether start fan b according to the comparison result, realize cooling system's closed-loop control, carry out early warning in advance and make remedial measure to the not good condition of cooling fan operation, guarantee that the heat dissipation of driver is always in controllable range, improve the reliability of driver, and service life is prolonged.

Description

Linear driver with rotating speed feedback and closed-loop heat dissipation control functions

Technical Field

The utility model relates to a linear driver's technical field especially relates to a linear driver with rotational speed feedback and closed loop heat dissipation control function.

Background

Linear actuators are now increasingly used, especially in low noise, EMI/RFI electromagnetic radiation sensitive and ultra smooth motion applications. Compared with a common PWM switching type servo driver, the servo driver is characterized in that: the motor has smooth driving, no torque ripple, no electromagnetic switch noise and high bandwidth, and can drive a motor with ultra-small inductance. But it also has the problems of low efficiency, large loss and too much heat generation. The existing linear driver generally selects a heat radiation fan with good quality and good heat radiation effect, the heat radiation effect is guaranteed during design, and the air volume overflows. But the reliability of the heat radiation system is not enough to be ensured only by the quality of the fan, and the air quantity of the heat radiation fan can be greatly reduced due to the damage of fan blades, the damage of bearings and even the fluctuation of a power supply when the heat radiation fan is used, so that the heat radiation effect is further reduced. The heat dissipation capacity of the line driver is extremely large, and the heat generation capacity of the power device is possibly larger than the heat dissipation capacity of a heat dissipation system, so that the power device is burnt. This puts higher demands on the reliability of the heat dissipation system of the linear driver, and how to ensure effective and reliable heat dissipation of the linear driver becomes a problem that must be considered in the design of the linear driver.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a linear driver with rotational speed feedback and closed loop heat dissipation control function improves the reliability of driver, improves life.

In order to achieve the above purpose, the utility model is realized by adopting the following technical scheme:

the utility model discloses a linear driver with rotational speed feedback and closed loop heat dissipation control function, including installing the fan a at the air intake, install the fin on one side shell of linear driver set up fan b on fan a's the wind channel, fan b electric connection director, the controller is used for gathering fan b's rotational speed signal and does the comparison with benchmark rotational speed signal, then confirms whether start fan b according to the comparative result.

In a possible technical scheme, the controller comprises an acquisition module, a comparison module and a driving module, the fan b is connected with the Hall sensor, a differential amplifier is arranged in the acquisition module and used for carrying out differential amplification on a voltage signal I acquired by the Hall sensor to convert the voltage signal I into an equal-proportion voltage signal II, the comparison module is used for comparing the voltage signal II with a reference voltage, and the driving module is used for controlling whether the fan b is started according to an output result of the comparison module.

In a possible technical scheme, the controller further comprises a control box fixed inside the driver body, and the acquisition module, the comparison module and the driving module are all fixed inside the control box.

In a possible technical solution, the control box comprises a control box housing fixedly connected with the driver body, and one side of the control box housing is fixedly connected with a control box cover plate.

In a possible technical scheme, the control box shell is provided with heat dissipation holes.

In a possible technical scheme, a temperature sensor is installed inside the driver body, and the temperature sensor is connected with the driving module through an electric signal.

In one possible technical scheme, an indicator lamp is arranged on the outer side of the driver body and electrically connected with the driving module, and when a voltage signal II is smaller than a reference voltage, the driving module controls the indicator lamp to be powered on for indication; when the voltage signal II is larger than the reference voltage, the indicator lamp is not electrified.

Compared with the prior art, the beneficial effects of the utility model are that: through increasing the redundant fan, the rotational speed signal of redundant fan is gathered and is compared with benchmark rotational speed signal to the controller, then confirm whether to start the redundant fan according to the comparison result, can judge cooling system's real-time status, and closed-loop control carries out early warning and makes remedial measure to the not good condition of radiator fan a operation, also can launch redundant fan b simultaneously when fan a radiating effect is normal but the temperature rise is too high simultaneously, provide holistic heat-sinking capability, guarantee that the heat dissipation of driver is always in controllable within range, improve the reliability of driver, improve life.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a second viewing angle according to the embodiment of the present invention;

fig. 3 is a schematic structural diagram of a third viewing angle according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of the controller;

FIG. 5 is a control schematic logic block diagram of a controller;

FIG. 6 is a schematic diagram of one of the circuit connections of the control principle implementation of the controller;

reference numerals: 1. a heat sink; 2. a fan a; 3. a fan b; 4. a control box; 5. a driver body; 6. a temperature sensor; 7. a control box cover plate; 8. a cover plate fixing screw; 9. an acquisition module; 10. a drive module; 11. a control box housing; 12. a comparison module; 13. the control box is fixed with screws.

Detailed Description

The following detailed description of the embodiments of the present invention is made with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

As shown in fig. 1 to fig. 2, a linear actuator with rotational speed feedback and closed-loop heat dissipation control functions according to an embodiment of the present invention includes a fan a2 installed at an air inlet, the fan a2 blows air into the linear actuator, a heat sink 1 is installed on a housing on one side of the linear actuator, the heat sink 1 dissipates heat to the outside of the actuator along with the airflow blown by the fan a2, and the fan a2 is preferably a high-airflow fan, and has a high rotational speed and a high airflow; a large part of air volume generated by the rotation of the fan a2 forms an air channel along the radiating fin 1, the fan b3 is arranged on the air channel of the fan a2, the fan b3 is arranged at the lower air inlet of the fan a2, the air channel can push the fan b3 to rotate at a certain rotating speed, the rotating speed is in linear relation with the fan a2, and the operating state of the main fan a is determined by observing the rotating speed of the fan b 3; the fan b3 is electrically connected with the controller, fig. 5 is a control schematic diagram of the controller, the controller is used for collecting a rotating speed signal of the fan b3 and comparing the rotating speed signal with a reference rotating speed signal, then whether the fan b3 is started is determined according to a comparison result, when the heat dissipation effect of the fan a2 is poor, an operator is timely reminded to check, and meanwhile, the controller controls the fan b3 to be started for compensation heat dissipation so as to ensure the heat dissipation effect and protect the driver; the fan a and the fan b can be products with proper models or specifications in the prior art, and the fan b can be used as redundant configuration of the fan a to realize one use and one standby.

In this embodiment, as shown in fig. 4, the controller includes an acquisition module 9, a comparison module 12, and a driving module 10, the fan b3 is connected to the hall sensor, a differential amplifier (not shown in the figure) is disposed in the acquisition module 9, and is configured to differentially amplify the voltage signal i acquired by the hall sensor to convert the voltage signal i into an equal-proportion voltage signal ii, the comparison module 12 is configured to compare the voltage signal ii with a reference voltage, and the driving module 10 is configured to control whether to start the fan b3 according to an output result of the comparison module 12.

Preferably, an indicator light (not shown in the figure) is arranged on the outer side of the driver body 5, the indicator light is electrically connected with the driving module 10, and when the voltage signal ii is smaller than the reference voltage, the driving module 10 controls the indicator light to be powered on for indication; when the voltage signal II is larger than the reference voltage, the indicator lamp is not electrified.

In specific implementation, referring to a schematic circuit connection diagram of fig. 6, when a fan b3 is driven by an air duct of a fan a2 to rotate, a pulse signal changing along with the rotating speed is generated by the change of a magnetic field induced by a hall sensor, a voltage signal i is generated by processing of a control analog switch MAX4544 and an adjustable precision voltage stabilizer TL431, a voltage signal ii is output by performing differential amplification on a precision operational amplifier OP27 and 2.5Vref, the voltage signal i and the voltage signal ii are in a linear relation with the rotating speed of the fan, and are compared with an adjustable reference voltage through a comparator N1, when the voltage signal ii is smaller than the reference voltage, a KA1 coil is electrified and conducted, a KA1 normally open contact is conducted, and a fan b3 and an indicator lamp are electrified and started; when the voltage signal II is larger than the reference voltage, the KA1 coil is not electrified and does not act, the KA1 normally open contact is not conducted, and the fan b3 and the indicating lamp are not electrified and started.

The reference voltage can be set and changed according to the rotation speed test result of the fan b3, for example, the reference voltage of the comparator N1 is changed by adjusting the adjustable group R9, and then the conduction condition of the comparator N1 is changed to change the conduction condition of the KA1, so as to change the starting time of the fan b3 and the indicator lamp, that is, the reference voltage of the comparator N1 is set according to the rotation speed of the test fan b3, the starting condition of the cooling fan b3 is determined, and the cooling fan b is started when the feedback of the rotation speed of the cooling fan b is smaller than the set value.

The rotating speed of the fan is reflected according to the change of the voltage, the rotating speed judgment is carried out by comparing the voltage signal fed back by the Hall with a reference voltage signal, if the rotating speed is lower than the reference voltage signal, the rotating speed of the cooling fan b is considered to be low, and at the moment, the line-driven cooling effect is poor or the fan a is abnormal.

The controller further comprises a control box 4 fixed inside the driver body 5, an acquisition module 9, a comparison module 12 and a driving module 10 are all fixed inside the control box 4, the acquisition module 9 is in electrical signal connection with a Hall sensor connected with the fan b3, and the driving module 10 is in electrical connection with the fan b3 and an indicator light; preferably, the control box 4 comprises a control box housing 11 fixedly connected with the driver body 5, specifically, for example, the control box housing 11 is in a shape of "convex", and the base of the control box housing 11 can be connected with the driver body 5 by a control box fixing screw 13, of course, the control box housing 11 can also be fixedly connected by other suitable means; one side of the control box shell 11 is fixedly connected with a control box cover plate 7, and specifically, for example, one side of the control box shell 11 is connected with the control box cover plate 7 through a cover plate fixing screw 8, and the components in the controller can be conveniently and periodically maintained and overhauled through the detachable structural design of the control box cover plate 7; of course, the control box housing 11 and the control box cover 7 may be fixedly connected in other suitable manners.

Preferably, the control box shell 11 is provided with heat dissipation holes to help the heat generated in the working process of the controller to be dissipated in time; the heat dissipation holes may be circular, strip-shaped, square or any other suitable shape, and preferably, a plurality of strip-shaped heat dissipation holes are formed in two opposite side walls of the control box housing 11.

Preferably, as shown in fig. 3, a temperature sensor 6 is installed inside the driver body 5, the temperature sensor 6 is in electrical signal connection with the driving module 10, when in use, the operating state of the fan a can be determined by observing the rotation speed of the cooling fan b, and the system can be used for judging the working condition of the cooling system in advance by combining the temperature sensor 6, when the cooling effect of the fan a is not good, for example, when the voltage signal ii in the controller comparison module is less than the reference voltage, and the temperature displayed by the temperature sensor 6 is not lower than the reference temperature, specifically, if the reference temperature can be set to 70 ℃, the cooling effect of the fan a is considered to be not good; at the moment, an operator is reminded to check in time, and the cooling fan b is started to perform compensation cooling so as to ensure the cooling effect and protect the driver; the fan b can be started when the heat dissipation effect of the fan a is normal but the temperature rise is too high, so that the whole heat dissipation capability is provided.

The utility model discloses in, hall sensor and temperature sensor adopt the market selling current product that is fit for model, specification, performance parameter requirement can.

The utility model discloses linear driver with rotational speed feedback and closed loop heat dissipation control function, it is at the during operation, fin 1 gives off the heat to the outside of driver along with the wind current that fan a2 insufflates, collection module 9 does the difference with voltage signal I that hall sensor gathered and amplifies the conversion into the voltage signal II of equal proportion, comparison module 12 compares voltage signal II with reference voltage, drive module 10 controls whether start fan b3 and pilot lamp according to the output result of comparison module 12, when voltage signal II is less than reference voltage, fan b3 and pilot lamp circular telegram start; when the voltage signal II is greater than the reference voltage, the fan b3 and the indicator lamp are not electrified and started; meanwhile, the operating state of the fan a can be determined by observing the rotating speed of the cooling fan b, and meanwhile, the system can judge the working condition of the cooling system in advance by combining the temperature sensor 6.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (7)

1. The linear driver with the rotating speed feedback and closed-loop heat dissipation control functions comprises a fan a (2) installed at an air inlet and is characterized in that a heat dissipation fin (1) is installed on a shell on one side of the linear driver, a fan b (3) is arranged on an air channel of the fan a (2), the fan b (3) is electrically connected with a controller, and the controller is used for acquiring a rotating speed signal of the fan b (3) and comparing the rotating speed signal with a reference rotating speed signal, and then determining whether to start the fan b (3) according to a comparison result.

2. The linear driver with the rotating speed feedback and closed-loop heat dissipation control functions as claimed in claim 1, wherein the controller comprises an acquisition module (9), a comparison module (12) and a driving module (10), the fan b (3) is connected with the hall sensor, a differential amplifier is arranged in the acquisition module (9) and used for carrying out differential amplification on a voltage signal I acquired by the hall sensor to convert the voltage signal I into a voltage signal II with equal proportion, the comparison module (12) is used for comparing the voltage signal II with a reference voltage, and the driving module (10) is used for controlling whether the fan b (3) is started or not according to an output result of the comparison module (12).

3. The linear actuator with rotational speed feedback and closed-loop heat dissipation control functions as claimed in claim 2, wherein the controller further comprises a control box (4) fixed inside the actuator body (5), and the acquisition module (9), the comparison module (12) and the driving module (10) are all fixed inside the control box (4).

4. The linear actuator with rotational speed feedback and closed-loop heat dissipation control functions as claimed in claim 3, wherein the control box (4) comprises a control box housing (11) fixedly connected with the actuator body (5), and a control box cover plate (7) is fixedly connected with one side of the control box housing (11).

5. The linear actuator with rotational speed feedback and closed-loop heat dissipation control functions as claimed in claim 4, wherein the control box housing (11) is provided with heat dissipation holes.

6. The linear driver with rotating speed feedback and closed-loop heat dissipation control functions as claimed in claim 5, wherein a temperature sensor (6) is mounted inside the driver body (5), and the temperature sensor (6) is in electrical signal connection with the driving module (10).

7. The linear driver with the rotating speed feedback and closed-loop heat dissipation control functions as claimed in claim 6, wherein an indicator lamp is arranged on the outer side of the driver body (5), the indicator lamp is electrically connected with the driving module (10), and when the voltage signal II is smaller than a reference voltage, the driving module (10) controls the indicator lamp to be powered on for indication; when the voltage signal II is larger than the reference voltage, the indicator lamp is not electrified.

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