Band-type brake energy-saving device

Abstract

The utility model discloses a band-type brake energy-saving device which comprises a power supply input module, a band-type brake coil, an MOSFET, an MOSFET driving module, a PWM pulse width limiting module and an MCU module, the power supply input module is connected to the band-type brake coil, the band-type brake coil is grounded through the MOSFET, the MOSFET driving module is connected to the MOSFET to drive the MOSFET, the MCU module is connected to the MOSFET driving module through the PWM pulse width limiting module, and the PWM pulse width limiting module is connected to the power supply input module. The PWM pulse width limiting module limits the maximum pulse width of the PWM signal sent by the MCU module. According to the band-type brake energy-saving device, current control of different stages of a band-type brake is achieved through PWM regulation and control, large current needed by starting of the band-type brake coil is provided in the starting stage, small current for maintaining attraction of the band-type brake coil is provided in the operation stage, and energy-saving control over the band-type brake coil is achieved.

Description

Technical Field

[0001] The utility model relates to a brake energy-saving device. Background Art

[0002] A brake, also known as a power-off brake, works on the principle of electromagnetism. When the coil is energized, it generates magnetic force to attract the corresponding structural components to release the brake. When the power is off, the motor is locked, which is equivalent to braking. Currently in the market, the power supply control of the motor brake coil uses simple on-off methods such as relays or MOS to control the on-off of the coil to achieve the opening and closing control of the brake. During normal operation, the brake coil needs to have current all the time so that the relevant structure can maintain the attracted state. Since a simple switch cannot adjust the current, it will inevitably lead to the situation that when a large current is not needed, the coil is still in the large current state, resulting in low energy efficiency of the whole machine, increased power consumption, increased heat generation, and affecting the life of the brake, and further affecting the equipment safety. Content of the Utility Model

[0003] The utility model provides a brake energy-saving device to solve the above-mentioned technical problems, and specifically adopts the following technical solutions:

[0004] A brake energy-saving device includes: a power input module, a brake coil, a MOSFET, a MOSFET driving module, a PWM pulse width limiting module, and an MCU module. Among them, the power input module is connected to the brake coil, the brake coil is grounded through the MOSFET, the MOSFET driving module is connected to the MOSFET to drive the MOSFET, the MCU module is connected to the MOSFET driving module through the PWM pulse width limiting module, and the PWM pulse width limiting module limits the maximum pulse width of the PWM signal sent from the MCU module.

[0005] Further, the PWM pulse width limiting module includes: a capacitor C163 and a resistor R237. The MCU module is grounded successively through the capacitor C163 and the resistor R237, and the midpoint of the capacitor C163 and the resistor R237 is connected to the MOSFET driving module.

[0006] Further, the PWM pulse width limiting module further includes a shaping circuit.

[0007] Further, the shaping circuit includes a comparator U38, a capacitor C162, and a resistor R54;

[0008] The 1 port of the comparator U38 is connected to the capacitor C163, the 2 port of the comparator U38 is connected to the resistor R237, the three port of the comparator U38 is grounded, the 5 port of the comparator U38 is grounded through the capacitor C162 and is connected to the MCU module, and the 4 port of the comparator U38 is connected to the MOSFET drive module through the resistor R54.

[0009] Further, the MOSFET drive module includes: a drive chip U26, a capacitor C184, a resistor R182, and a resistor R196;

[0010] The 3 port of the drive chip U26 is connected to the resistor R54, the 2 and 4 ports of the drive chip U26 are grounded, the 1 port of the drive chip U26 is grounded through the capacitor C184, the 5 port of the drive chip U26 is grounded through the resistor R182 and the resistor R196, and the midpoint of the resistor R182 and the resistor R196 is connected to the MOSFET.

[0011] Further, the power input module includes a switch JP3 and a diode D7;

[0012] The 3 and 4 ports of the switch JP3 are grounded, and the diode D7 is connected between the 1 and 2 ports of the switch JP3.

[0013] Further, the power input module further includes a resistor R190 and a capacitor C131;

[0014] The resistor R190 and the capacitor C131 are connected and connected between the 1 and 2 ports of the switch JP3.

[0015] Further, the power input module further includes a resistor R279 and a light emitting diode LED5;

[0016] The resistor R279 and the light emitting diode LED5 are connected and connected between the 1 and 2 ports of the switch JP3.

[0017] Further, the brake energy saving device further includes a parameter setting module, the parameter setting is connected to the MCU module, the parameter setting module is used for an operator to set PWM signal parameters, and the MCU module outputs a corresponding PWM signal according to the parameters configured by the parameter setting module.

[0018] Further, the brake energy saving device further includes a temperature detection module, the temperature detection module is used to detect ambient temperature information, and the temperature detection module is connected to the MCU module.

[0019] The beneficial effect of the present utility model lies in the provided brake energy-saving device, which realizes the current control of different stages of the brake by means of PWM regulation. A large current required for the start of the brake coil is provided in the start-up stage, and a small current for maintaining the attraction of the brake coil is provided in the operation stage, thus realizing the energy-saving control of the brake coil. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 is a schematic diagram of a brake energy-saving device of the present utility model;

[0022] Figure 2 is a circuit diagram of a brake energy-saving device of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following will describe in detail the embodiments of the present application. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present application, and should not be construed as a limitation of the present application.

[0024] As Figure 1 shown, a brake energy-saving device of the present application includes: a power input module, a brake coil, a MOSFET, a MOSFET driving module, a PWM pulse width limiting module, and an MCU module. Among them, the power input module is connected to the brake coil, the brake coil is grounded through the MOSFET, the MOSFET driving module is connected to the MOSFET to drive the MOSFET, the MCU module is connected to the MOSFET driving module through the PWM pulse width limiting module, and the PWM pulse width limiting module limits the maximum pulse width of the PWM signal sent from the MCU module. For the brake energy-saving device of the present application, the MCU module realizes the current control of different stages of the brake by means of PWM regulation. A large current required for the start of the brake coil is provided in the start-up stage, and a small current for maintaining the attraction of the brake coil is provided in the operation stage, thus realizing the energy-saving control of the brake coil.

[0025] As Figure 2As shown, in the embodiments of the present application, the PWM pulse width limiting module includes: capacitor C163 and resistor R237. The MCU module is grounded through capacitor C163 and resistor R237 in sequence, and the midpoint of capacitor C163 and resistor R237 is connected to the MOSFET driving module. Capacitor C163 and resistor R237 form a pulse width limiting circuit, which limits the maximum pulse width at the hardware level to avoid the current of the brake coil exceeding the standard for a long time caused by misoperation.

[0026] In the embodiments of the present application, the PWM pulse width limiting module further includes a shaping circuit. In the embodiments of the present application, the shaping circuit includes comparator U38, capacitor C162 and resistor R54, which shapes the signal of the pulse width limiting part into a standard square wave. The 1 port of comparator U38 is connected to capacitor C163, the 2 port of comparator U38 is connected to resistor R237, the three port of comparator U38 is grounded, the 5 port of comparator U38 is grounded through capacitor C162 and connected to the MCU module, and the 4 port of comparator U38 is connected to the MOSFET driving module through resistor R54.

[0027] In the embodiments of the present application, the MOSFET driving module includes: driving chip U26, capacitor C184, resistor R182 and resistor R196. U26 is a MOSFET gate driving chip for driving MOSFET Q11.

[0028] The 3 port of driving chip U26 is connected to resistor R54, the 2 and 4 ports of driving chip U26 are grounded, the 1 port of driving chip U26 is grounded through capacitor C184, the 5 port of driving chip U26 is grounded through resistor R182 and resistor R196, and the midpoint of resistor R182 and resistor R196 is connected to the MOSFET.

[0029] In the embodiments of the present application, the power input module includes switch JP3 and diode D7. The 3 and 4 ports of switch JP3 are grounded, and diode D7 is connected between the 1 and 2 ports of switch JP3. D7 is a freewheeling diode for the brake coil, which makes the current of the brake coil stable and continuous.

[0030] In the embodiments of the present application, the power input module further includes resistor R190 and capacitor C131. Resistor R190 and capacitor C131 are connected and connected between the 1 and 2 ports of switch JP3. Resistor R190 and capacitor C131 form a spike absorption circuit for protecting the MOSFET.

[0031] In the embodiments of the present application, the power input module further includes resistor R279 and light emitting diode LED5. Resistor R279 and light emitting diode LED5 are connected and connected between the 1 and 2 ports of switch JP3.

[0032] As an alternative embodiment, the brake energy-saving device further includes a parameter setting module. The parameter setting is connected to the MCU module. The parameter setting module is used for an operator to set the PWM signal parameters, and the MCU module outputs a corresponding PWM signal according to the parameters configured by the parameter setting module.

[0033] It can be understood that for different models of brakes, their corresponding control voltages are different. In this application, through the parameter setting module, the operator can conveniently make corresponding settings according to the model of the brake, so that the brake energy-saving device of this application can adapt to different models of brakes.

[0034] In the embodiment of this application, the brake energy-saving device further includes a temperature detection module. The temperature detection module is used to detect the ambient temperature information. The temperature detection module is connected to the MCU module, and the MCU module corrects the parameters set by the parameter setting module according to the temperature value detected by the temperature detection module.

[0035] It can be understood that even for the same brake, its preferred working current is different in different environments, and correspondingly, the PWM signal output by the MCU module also changes accordingly. Therefore, even if the parameters are set through the parameter setting module. However, these parameters are generally set for normal temperature conditions. When the temperature is extremely cold or high, it is preferably possible to make corresponding corrections to the set parameters so that the brake works in a better state. In this application, the ambient temperature is detected by the temperature detection module. The temperature range is set with multiple range intervals, and different temperature ranges correspond to different correction values. When the detected temperature is in the corresponding temperature interval, the MCU module makes adaptive parameter revisions.

[0036] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the above embodiments do not limit the present invention in any form. Any technical solutions obtained by using equivalent replacements or equivalent transformations fall within the protection scope of the present invention.

Claims

1. A brake energy-saving device, characterized in that: The invention comprises: a power input module, a brake coil, a MOSFET, a MOSFET driving module, a PWM pulse width limiting module and an MCU module, wherein the power input module is connected to the brake coil, the brake coil is grounded through the MOSFET, the MOSFET driving module is connected to the MOSFET to drive the MOSFET, the MCU module is connected to the MOSFET driving module through the PWM pulse width limiting module, and the PWM pulse width limiting module limits the maximum pulse width of the PWM signal emitted from the MCU module.

2. The brake energy saving device according to claim 1, characterized in that: The PWM pulse width limiting module includes: a capacitor C163 and a resistor R237, the MCU module is grounded via the capacitor C163 and the resistor R237 in sequence, and the midpoint of the capacitor C163 and the resistor R237 is connected to the MOSFET driving module.

3. The brake energy saving device according to claim 2, characterized in that: The PWM pulse width limiting module also includes a shaping circuit.

4. The brake energy saving device according to claim 3, characterized in that: The shaping circuit includes a comparator U38, a capacitor C162 and a resistor R54; Port 1 of the comparator U38 is connected to the capacitor C163, port 2 of the comparator U38 is connected to the resistor R237, port 3 of the comparator U38 is grounded, port 5 of the comparator U38 is grounded through the capacitor C162 and connected to the MCU module, and port 4 of the comparator U38 is connected to the MOSFET drive module through the resistor R54.

5. The brake energy saving device according to claim 4, characterized in that: The MOSFET driving module includes: a driving chip U26, a capacitor C184, a resistor R182 and a resistor R196; Port 3 of the driving chip U26 is connected to the resistor R54, ports 2 and 4 of the driving chip U26 are grounded, port 1 of the driving chip U26 is grounded through the capacitor C184, port 5 of the driving chip U26 is grounded through the resistor R182 and the resistor R196, and the midpoint of the resistor R182 and the resistor R196 is connected to the MOSFET.

6. The brake energy saving device according to claim 5, characterized in that: The power input module includes a switch JP3 and a diode D7; Ports 3 and 4 of the switch JP3 are grounded, and the diode D7 is connected between ports 1 and 2 of the switch JP3.

7. The brake energy saving device according to claim 6, characterized in that: The power input module also includes a resistor R190 and a capacitor C131; The resistor R190 is connected to the capacitor C131 and is connected between ports 1 and 2 of the switch JP3 .

8. The brake energy saving device according to claim 7, characterized in that: The power input module also includes a resistor R279 and a light emitting diode LED5; The resistor R279 is connected to the light emitting diode LED5 and is connected between ports 1 and 2 of the switch JP3.

9. The brake energy saving device according to claim 1, characterized in that: The brake energy-saving device also includes a parameter setting module, which is connected to the MCU module. The parameter setting module is used for an operator to set PWM signal parameters, and the MCU module outputs a corresponding PWM signal according to the parameter configuration of the parameter setting module.

10. The brake energy saving device according to claim 1, characterized in that: The brake energy-saving device further includes a temperature detection module, which is used to detect ambient temperature information and is connected to the MCU module.

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