CN117734654A - Design method of maintenance voltage of electromagnetic brake of engineering vehicle - Google Patents
Design method of maintenance voltage of electromagnetic brake of engineering vehicle Download PDFInfo
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- CN117734654A CN117734654A CN202311646285.1A CN202311646285A CN117734654A CN 117734654 A CN117734654 A CN 117734654A CN 202311646285 A CN202311646285 A CN 202311646285A CN 117734654 A CN117734654 A CN 117734654A
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- electromagnetic brake
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- 238000012423 maintenance Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000003990 capacitor Substances 0.000 claims description 7
- 230000017525 heat dissipation Effects 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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- Braking Systems And Boosters (AREA)
Abstract
The design method of the maintenance voltage of the electromagnetic brake of the engineering vehicle is characterized by comprising the following steps of: the rated voltage, the maintaining voltage and the minimum actuation voltage of the electromagnetic brake are set to be equal to or greater than the rated voltage and equal to or greater than the minimum actuation voltage, so that the electromagnetic brake can be quickly restored to actuation after instantaneous power failure or instantaneous electromagnet detachment occurs. The electromagnetic brake can be quickly recovered to be attracted after the electromagnetic brake is powered off instantaneously or the electromagnet is separated instantaneously, so that the forced dragging friction of the brake is avoided, the operation safety of a brake system is improved, the working condition adaptability of equipment can be effectively improved when the electromagnetic brake is applied to an engineering vehicle working aloft, the failure of the electromagnetic brake caused by mechanical impact, MCU or accidental faults of a wire harness and the like is avoided, and the operation safety and reliability of the engineering vehicle are improved.
Description
Technical Field
The invention relates to a design method of maintenance voltage of an electromagnetic brake of an engineering vehicle, and belongs to the technical field of electromagnetic brakes.
Background
The electric control system has the advantages of low energy consumption, high efficiency, simple control and capability of realizing more precise control, and under the condition of the same equipment technical parameters, the electric control system has relatively simple structure and small occupied space, so that the electric control system is widely applied to engineering machinery and special vehicles, the application of an electromagnetic brake is more common along with the wide application of an electric drive system, and the application environment and working conditions of the electromagnetic brake are more complicated. The electromagnetic brake is an ideal automatic executing element in the modern industry, mainly plays roles in transmitting power, controlling motion and the like in a mechanical transmission system, and controls an electromagnetic coil of the electromagnetic brake through a power supply, so that the control of an armature in the electromagnetic brake can be realized, and the actuation or the disconnection of the electromagnetic brake is controlled. However, since the electromagnetic brake is a member requiring a long time to be energized, there are strict requirements on heat generation, energy consumption and stability of the brake. Currently, the following problems exist depending on electromagnetic brake design and application:
1. the common method for the electromagnetic brake is rated starting and voltage reducing operation, and the maintenance voltage is unreasonable to be selected due to confusion of the relation between rated voltage, maintenance voltage and minimum pull-in voltage, so that the electromagnetic brake cannot be automatically pulled in once being disconnected instantly under complex working conditions, and system components are burnt. For example, due to mechanical impact, MCU or accidental fault of wire harness in the overhead working vehicle, the electromagnetic brake can not recover normal actuation after instantaneous power failure or electromagnet separation in the working process, the fault electromagnetic brake is forced to drag, so that the brake is in high-temperature friction to cause failure, and other sensors are burnt.
2. Considering the heating problem of meeting the actuation of the brake and long-time power-on operation, if the heat dissipation efficiency is to be met, the volume of the brake is increased, and the installation and arrangement requirements are not facilitated.
Disclosure of Invention
According to the design method of the maintenance voltage of the electromagnetic brake of the engineering vehicle, provided by the invention, after the electromagnetic brake is subjected to instantaneous power failure or the electromagnet is instantaneously separated, the electromagnetic brake can be ensured to be quickly restored to be attracted, the forced dragging friction of the brake is avoided, the operation safety of a brake system is improved, the working condition adaptability of equipment can be effectively improved when the electromagnetic brake is applied to the engineering vehicle working aloft, the failure of the electromagnetic brake caused by mechanical impact, MCU or accidental faults of a wire harness and the like is avoided, and the operation safety and reliability of the engineering vehicle are improved.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the design method of the maintenance voltage of the electromagnetic brake of the engineering vehicle is characterized by comprising the following steps of: the rated voltage, the maintaining voltage and the minimum actuation voltage of the electromagnetic brake are set to be equal to or greater than the rated voltage and equal to or greater than the minimum actuation voltage, so that the electromagnetic brake can be quickly restored to actuation after instantaneous power failure or instantaneous electromagnet detachment occurs.
Preferably, an MCU control program of a braking system where the electromagnetic brake is arranged is designed, and the MCU is used for controlling the voltage output of the braking system, so that the rated voltage of the electromagnetic brake is more than or equal to the maintaining voltage of the electromagnetic brake, and the maintaining voltage of the electromagnetic brake is more than or equal to the minimum actuation voltage of the electromagnetic brake.
Preferably, a braking circuit in which the electromagnetic brake is arranged is changed, so that the voltage of the electromagnetic brake reaches the rated voltage when the braking circuit is electrified and started, and the maintenance voltage of the electromagnetic brake is larger than or equal to the minimum actuation voltage and smaller than or equal to the rated voltage when the electromagnetic brake keeps actuation.
Preferably, the "brake circuit where the electromagnetic brake is changed" means that a voltage dividing resistor R1 for dividing voltage is connected in series in the brake circuit, and a capacitor C is connected in parallel to the voltage dividing resistor R1.
Preferably, the resistance of the voltage dividing resistor R1 is designed so that the holding voltage of the electromagnetic brake is equal to or higher than the minimum pull-in voltage thereof and equal to or lower than the rated voltage thereof.
Preferably, a diode D is connected in parallel to the braking circuit, and a release channel of electric energy and magnetic field energy is provided for the braking circuit when the braking circuit is powered off through the diode D.
The invention has the beneficial effects that:
1. according to the design method of the maintenance voltage of the electromagnetic brake of the engineering vehicle, the rated voltage, the maintenance voltage and the minimum actuation voltage of the electromagnetic brake are set to be equal to or higher than the rated voltage and equal to or higher than the minimum actuation voltage, the rated voltage of the electromagnetic brake is started, the voltage of the electromagnetic brake is reduced to the maintenance voltage in the state that the electromagnetic brake is kept actuated, the maintenance voltage is equal to or higher than the minimum actuation voltage, the electromagnetic brake can be ensured to be quickly restored to actuate after the electromagnetic brake is instantly powered off or the electromagnet is instantly separated, the forced dragging friction of the brake is avoided, the operation safety of a brake system is improved, the working condition adaptability of equipment can be effectively improved when the electromagnetic brake is applied to the engineering vehicle working aloft, and the operation safety and reliability of the engineering vehicle are improved due to mechanical impact, MCU or accidental faults of a wire harness and the like.
2. The invention can adopt a software design mode of changing a control program to set the rated voltage, the maintenance voltage and the minimum actuation voltage of the electromagnetic brake, can also adopt a hardware design mode of changing a brake circuit to set the rated voltage, the maintenance voltage and the minimum actuation voltage of the electromagnetic brake, and is connected with a diode D in parallel on the brake circuit when the brake circuit is changed, and provides a release channel of electric energy and magnetic field energy for the brake circuit when the brake circuit is powered off through the diode D, thereby improving the heat dissipation speed of the electromagnetic brake, preventing other sensors of the brake system from being burnt out, avoiding the increase of the space volume of the electromagnetic brake due to heat dissipation, and being beneficial to the space arrangement of the whole vehicle.
Drawings
FIG. 1 is a schematic circuit diagram of a braking circuit in which an electromagnetic brake is located in a design method of maintaining voltage of the electromagnetic brake of an engineering vehicle.
Detailed Description
An embodiment of the present invention will be described in detail with reference to fig. 1.
The design method of the maintenance voltage of the electromagnetic brake of the engineering vehicle is characterized by comprising the following steps of: the rated voltage, the maintaining voltage and the minimum actuation voltage of the electromagnetic brake are set to be equal to or greater than the rated voltage and equal to or greater than the minimum actuation voltage, so that the electromagnetic brake can be quickly restored to actuation after instantaneous power failure or instantaneous electromagnet detachment occurs.
According to the design method of the maintenance voltage of the electromagnetic brake of the engineering vehicle, the rated voltage, the maintenance voltage and the minimum actuation voltage of the electromagnetic brake are set to be equal to or higher than the rated voltage and equal to or higher than the minimum actuation voltage, the rated voltage of the electromagnetic brake is started, the voltage of the electromagnetic brake is reduced to the maintenance voltage in the state that the electromagnetic brake is kept actuated, the maintenance voltage is equal to or higher than the minimum actuation voltage, the electromagnetic brake can be quickly recovered to actuate after the electromagnetic brake is powered off instantaneously or the electromagnet is separated instantaneously, forced dragging friction of the brake is avoided, the operation safety of a brake system is improved, the working condition adaptability of equipment can be effectively improved when the electromagnetic brake is applied to the engineering vehicle working aloft, and the operation safety and reliability of the engineering vehicle are improved due to failure of the electromagnetic brake caused by mechanical impact, MCU or wire harness accidental faults and the like.
The MCU control program of the braking system where the electromagnetic brake is arranged is designed, and the MCU is used for controlling the voltage output of the braking system, so that the rated voltage of the electromagnetic brake is more than or equal to the maintaining voltage of the electromagnetic brake, and the maintaining voltage of the electromagnetic brake is more than or equal to the minimum actuation voltage of the electromagnetic brake. The method means that the setting of rated voltage, maintenance voltage and minimum actuation voltage of the electromagnetic brake is realized by adopting a software design mode of changing a control program, and hardware equipment of a brake system is not changed and only the control program is changed.
The brake circuit where the electromagnetic brake is located is changed, so that the voltage of the electromagnetic brake reaches the rated voltage when the brake circuit is electrified and started, and the maintenance voltage of the electromagnetic brake is larger than or equal to the minimum actuation voltage and smaller than or equal to the rated voltage when the electromagnetic brake keeps actuation. The method is that the hardware design mode of the brake circuit is changed to set the rated voltage, the maintenance voltage and the minimum actuation voltage of the electromagnetic brake, so that the voltage of the electromagnetic brake is reduced along with the maintenance state of the brake circuit, the maintenance voltage is maintained after the voltage is reduced, and the maintenance voltage is larger than or equal to the minimum actuation voltage of the electromagnetic brake and smaller than or equal to the rated voltage of the electromagnetic brake.
The "brake circuit where the variable electromagnetic brake is located" means that a voltage dividing resistor R1 for voltage division is connected in series in the brake circuit, and a capacitor C is connected in parallel to the voltage dividing resistor R1. As shown in fig. 1, the changed braking circuit is characterized in that a magnetic coil L is connected in series with a braking resistor R, an alternating current power supply u starts to supply power at the moment of starting the braking circuit, a voltage dividing resistor R1 is approximately shorted by a capacitor C by utilizing the characteristics of direct current resistance and low impedance of the capacitor C, the current of the electromagnetic coil L increases rapidly, and the voltage of the electromagnetic coil L reaches a rated voltage value; when the capacitor C is charged, the current of the branch where the capacitor C is located is zero, the brake circuit enters a holding state, the voltage dividing resistor R1 plays a role in dividing voltage, the current of the electromagnetic coil L is reduced, the voltage is reduced, the electromagnetic brake enters a holding state for holding attraction, the holding voltage of the electromagnetic brake can be regulated by utilizing the divided voltage of the voltage dividing resistor R1, so that the holding voltage of the electromagnetic brake is greater than or equal to the minimum attraction voltage and less than or equal to the rated voltage, and the purpose of regulating the holding voltage of the electromagnet is achieved by regulating the holding voltage of the electromagnet in a resistance-capacitance parallel connection mode.
The resistance value of the voltage dividing resistor R1 is designed to ensure that the maintenance voltage of the electromagnetic brake is more than or equal to the minimum actuation voltage and less than or equal to the rated voltage. By designing the resistance value of the voltage dividing resistor R1, the voltage dividing amount of the voltage dividing resistor R1 to the brake circuit can be determined, and the maintenance voltage on the electromagnetic coil L is regulated to be more than or equal to the minimum pull-in voltage and less than or equal to the rated voltage when the brake circuit enters the holding state.
Preferably, a diode D is connected in parallel to the braking circuit, and a release channel of electric energy and magnetic field energy is provided for the braking circuit when the braking circuit is powered off through the diode D. The diode does not play a role in the attraction operation process of the electromagnetic brake, and the diode D plays a role in providing a release channel of electric energy and magnetic field energy for the brake circuit when the power is off, so that the heat dissipation speed of the electromagnetic brake is improved, other sensors of the brake system are prevented from being burnt, the space volume of the electromagnetic brake is prevented from being increased due to heat dissipation, and the space arrangement of the whole vehicle is facilitated.
The foregoing disclosure of embodiments of the present invention has been fully described with reference to the accompanying drawings, in which it is to be understood that the embodiments described are merely some of the embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Claims (6)
1. The design method of the maintenance voltage of the electromagnetic brake of the engineering vehicle is characterized by comprising the following steps of: the rated voltage, the maintaining voltage and the minimum actuation voltage of the electromagnetic brake are set to be equal to or greater than the rated voltage and equal to or greater than the minimum actuation voltage, so that the electromagnetic brake can be quickly restored to actuation after instantaneous power failure or instantaneous electromagnet detachment occurs.
2. The method for designing the maintenance voltage of the electromagnetic brake of the engineering vehicle according to claim 1, wherein the method comprises the following steps: and designing an MCU control program of a braking system where the electromagnetic brake is positioned, and controlling the voltage output of the braking system by using the MCU to ensure that the rated voltage of the electromagnetic brake is more than or equal to the maintaining voltage of the electromagnetic brake and the maintaining voltage of the electromagnetic brake is more than or equal to the minimum actuation voltage of the electromagnetic brake.
3. The method for designing the maintenance voltage of the electromagnetic brake of the engineering vehicle according to claim 1, wherein the method comprises the following steps: the braking circuit where the electromagnetic brake is positioned is changed, so that the voltage of the electromagnetic brake reaches the rated voltage when the braking circuit is electrified and started, and the maintenance voltage of the electromagnetic brake is larger than or equal to the minimum actuation voltage and smaller than or equal to the rated voltage when the electromagnetic brake keeps actuation.
4. The method for designing the maintenance voltage of the electromagnetic brake of the engineering vehicle according to claim 3, wherein: the "brake circuit where the variable electromagnetic brake is located" means that a voltage dividing resistor R1 for dividing voltage is connected in series in the brake circuit, and a capacitor C is connected in parallel to the voltage dividing resistor R1.
5. The method for designing the maintenance voltage of the electromagnetic brake of the engineering vehicle according to claim 4, wherein the method comprises the following steps: the resistance value of the voltage dividing resistor R1 is designed to ensure that the maintenance voltage of the electromagnetic brake is more than or equal to the minimum actuation voltage and less than or equal to the rated voltage.
6. The method for designing the maintenance voltage of the electromagnetic brake of the engineering vehicle according to claim 4, wherein the method comprises the following steps: a diode D is connected in parallel to the braking circuit, and a release channel of electric energy and magnetic field energy is provided for the braking circuit when the braking circuit is powered off through the diode D.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311646285.1A CN117734654A (en) | 2023-12-04 | 2023-12-04 | Design method of maintenance voltage of electromagnetic brake of engineering vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311646285.1A CN117734654A (en) | 2023-12-04 | 2023-12-04 | Design method of maintenance voltage of electromagnetic brake of engineering vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117734654A true CN117734654A (en) | 2024-03-22 |
Family
ID=90276880
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311646285.1A Pending CN117734654A (en) | 2023-12-04 | 2023-12-04 | Design method of maintenance voltage of electromagnetic brake of engineering vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117734654A (en) |
-
2023
- 2023-12-04 CN CN202311646285.1A patent/CN117734654A/en active Pending
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