CN-121973743-A - Electromagnetic brake control device and method based on state detection

CN121973743ACN 121973743 ACN121973743 ACN 121973743ACN-121973743-A

Abstract

The invention discloses an electromagnetic brake control device and method based on state detection, wherein the electromagnetic brake control device comprises an electromagnetic brake coil control circuit, an electromagnetic brake state monitoring circuit and an MCU, wherein the electromagnetic brake coil control circuit is electrically connected with an electromagnetic brake coil and is used for controlling the state of electromagnetic brake by controlling whether the electromagnetic brake coil is electrified or not, the electromagnetic brake state monitoring circuit is electrically connected with the electromagnetic brake coil control circuit and is used for detecting the state of electromagnetic brake and feeding back the state to the MCU, and the MCU is simultaneously connected with the electromagnetic brake coil control circuit and the electromagnetic brake state monitoring circuit and is used for controlling whether the electromagnetic brake coil control circuit works or not and judging whether the state of electromagnetic brake is normal or not according to the state of electromagnetic brake fed back by the electromagnetic brake state monitoring circuit. The invention effectively avoids the misoperation of equipment when the brake is abnormal, and obviously improves the safety and reliability of the system operation.

Inventors

SHI FENG
HU TAO
WANG YINGZHI
CHEN JING
Lv Genjie
HE RONG
HUANG BING

Assignees

浙江捷昌线性驱动科技股份有限公司

Dates

Publication Date: 20260505
Application Date: 20260209

Claims (10)

1. An electromagnetic brake control device based on state detection, controlled by a power supply, characterized by comprising: the brake coil control circuit is electrically connected with the electromagnetic brake coil and is used for controlling the state of electromagnetic brake by controlling whether the electromagnetic brake coil is electrified or not; the electromagnetic brake state monitoring circuit is electrically connected with the brake coil control circuit and is used for detecting the state of electromagnetic brake and feeding back the state to the MCU; and the MCU is electrically connected with the brake coil control circuit and the electromagnetic brake state monitoring circuit at the same time and is used for controlling whether the brake coil control circuit works or not and judging whether the electromagnetic brake state is normal or not according to the electromagnetic brake state fed back by the electromagnetic brake state monitoring circuit.
2. The electromagnetic brake control device based on state detection according to claim 1, wherein the brake coil control circuit comprises a first field effect transistor, a first triode and a first divider resistor, a source electrode of the first field effect transistor is connected with a power supply, a grid electrode of the first field effect transistor is connected with a collector electrode of the first triode, a drain electrode of the first field effect transistor is connected with the electromagnetic brake coil, a base electrode of the first triode is connected with a brake signal end of the MCU, an emitter electrode of the first triode is grounded, and the divider resistor is arranged between the first field effect transistor and the first triode.
3. The electromagnetic brake control device based on state detection according to claim 2, wherein a self-recovery fuse is further arranged between the power supply and the source electrode of the first field effect transistor.
4. The electromagnetic brake control device based on state detection according to claim 2, wherein the electromagnetic brake state monitoring circuit comprises a photoelectric coupler, an anode of a light emitting diode of the photoelectric coupler is connected with a brake power supply voltage detection end, a cathode of the light emitting diode of the photoelectric coupler is connected with an electromagnetic brake coil, the brake power supply voltage detection end is arranged at a drain end of the first field effect transistor, an internal triode of the photoelectric coupler is controlled to be on-off by the light emitting diode, and the internal triode is further connected with a brake state detection end of the MCU.
5. The electromagnetic brake control device based on state detection according to claim 2, wherein the electromagnetic brake state monitoring circuit comprises a second voltage dividing resistor, the second voltage dividing resistor is arranged between the electromagnetic brake coil and the brake state detection end of the MCU, and the resistance value of the second voltage dividing resistor is more than 10 times of the internal resistance value of the electromagnetic brake coil.
6. The electromagnetic brake control device based on state detection according to claim 2, wherein a transient suppression diode is further connected in series between the electromagnetic brake coil and the ground, a cathode of the transient suppression diode is connected with one end of the electromagnetic brake coil, which is close to the drain electrode of the first field effect tube, and an anode of the transient suppression diode is grounded and is used for suppressing reverse surge voltage generated when the electromagnetic brake coil is powered off.
7. An electromagnetic brake control method based on state detection is suitable for equipment carrying electromagnetic brakes, and is characterized by comprising the following steps: the power supply is electrified, the electromagnetic brake control device based on state detection starts to work, and the running state of the equipment is detected; If the equipment is in a static state, the brake coil control circuit is not electrified, and then the electromagnetic brake coil is not electrified, and the electromagnetic brake is in a locking state; When the electromagnetic brake coil is in an abnormal state and is disconnected, the MCU reads that the electromagnetic brake is in a locking state through the electromagnetic brake state monitoring circuit, and the MCU sends a control signal to prevent the equipment carrying the electromagnetic brake from running.
8. The electromagnetic brake control method based on state detection according to claim 7, wherein when the electromagnetic brake coil is in an abnormal state and is disconnected, the MCU reads that the electromagnetic brake is in a locked state through the electromagnetic brake state monitoring circuit, specifically: When the first triode of the brake coil control circuit is conducted, the electromagnetic brake coil is in abnormal disconnection, the electromagnetic brake state monitoring circuit is provided with a photoelectric coupler, a light emitting diode of the photoelectric coupler is not lightened, the electromagnetic brake state monitoring circuit feeds back the electromagnetic brake disconnection to the brake state detection end of the MCU, and the MCU jointly judges that the electromagnetic brake coil is in an abnormal state according to signals of the brake signal end and the brake state detection end.
9. The electromagnetic brake control method based on state detection according to claim 7, wherein when the electromagnetic brake coil is in an abnormal state and is disconnected, the MCU reads that the electromagnetic brake is in a locked state through the electromagnetic brake state monitoring circuit, specifically: When the first triode of the brake coil control circuit is conducted, the electromagnetic brake coil is in abnormal disconnection, the electromagnetic brake state monitoring circuit is provided with a voltage dividing resistor, the voltage dividing resistor does not work when the electromagnetic brake coil is disconnected, the electromagnetic brake state monitoring circuit feeds back signals different from the normal state to the brake state detection end of the MCU, and the MCU judges that the electromagnetic brake coil is in abnormal state according to the signals of the brake state detection end.
10. The electromagnetic brake control method based on state detection according to claim 7, wherein after the MCU judges that the electromagnetic brake coil is in an abnormal state, the electromagnetic brake state is continuously detected repeatedly by the electromagnetic brake state monitoring circuit every 50-200ms, and if the electromagnetic brake is detected to be recovered to a normal on state continuously for a plurality of times, the MCU releases the equipment operation restriction after delaying for 1-3 seconds, and allows the equipment to be started according to an operation instruction.

Description

Electromagnetic brake control device and method based on state detection Technical Field The invention relates to the technical field of electronic control, in particular to an electromagnetic brake control device and method based on state detection. Background In the prior art, most electromagnetic brake coils are externally connected with two independent wires to carry out switch control on the controller, convenience and more scheme selectivity are provided for the design of an internal circuit of the controller, each state of the brake can be effectively detected, and the cost of the wires is increased to a certain extent due to the fact that the two independent wires are correspondingly connected with each other. In order to save the cost of wires, some hub motor manufacturers can connect one end of an electromagnetic brake coil with GND of a Hall, so that the sharing of cathodes is realized, and a controller only needs to give positive voltage to the electromagnetic brake coil, thereby reducing the cost, as shown in FIG. 1. Because electromagnetic braking is related to the safety of a system and a user, the state of braking needs to be detected, but because the cathodes are shared, the designability of a circuit scheme for detecting the state of electromagnetic braking is reduced, and certain difficulty exists in design. Disclosure of Invention The invention aims to overcome the defects that in the prior art, in order to save wire cost, the designability of a brake state detection circuit is reduced, the design is difficult, and the brake state cannot be effectively detected to ensure the safety of a system and a user due to the design of a common negative electrode of an electromagnetic brake coil and a Hall GND, and provides an electromagnetic brake control device and an electromagnetic brake control method based on state detection. The invention aims at realizing the following technical scheme: an electromagnetic brake control device based on state detection, controlled by a power supply, comprising: The electromagnetic brake coil control circuit is electrically connected with the electromagnetic brake coil and is used for controlling the state of electromagnetic brake by controlling whether the electromagnetic brake coil is electrified or not; the electromagnetic brake state monitoring circuit is electrically connected with the electromagnetic brake coil control circuit and is used for detecting the state of electromagnetic brake and feeding back the state to the MCU; And the MCU is electrically connected with the electromagnetic brake coil control circuit and the electromagnetic brake state monitoring circuit at the same time and is used for controlling whether the electromagnetic brake coil control circuit works or not and judging whether the electromagnetic brake state is normal or not according to the electromagnetic brake state fed back by the electromagnetic brake state monitoring circuit. Preferably, the brake coil control circuit comprises a first field effect tube, a first triode and a first divider resistor, wherein a source electrode of the first field effect tube is connected with a power supply, a grid electrode of the first field effect tube is connected with a collector electrode of the first triode, a drain electrode of the first field effect tube is connected with the electromagnetic brake coil, a base electrode of the first triode is connected with a brake signal end of the MCU, an emitter electrode of the first triode is grounded, and the divider resistor is arranged between the first field effect tube and the first triode. Preferably, a self-recovery fuse is further arranged between the power supply and the source electrode of the first field effect transistor. Preferably, the electromagnetic brake state monitoring circuit comprises a photoelectric coupler, wherein an anode of a light emitting diode of the photoelectric coupler is connected with a brake power supply voltage detection end, a cathode of the light emitting diode of the photoelectric coupler is connected with an electromagnetic brake coil, the brake power supply voltage detection end is arranged at a drain end of the first field effect tube, an internal triode of the photoelectric coupler is controlled to be on-off through the light emitting diode, and the internal triode is further connected with a brake state detection end of the MCU. Preferably, the electromagnetic brake state monitoring circuit comprises a second voltage-dividing resistor, wherein the second voltage-dividing resistor is arranged between the electromagnetic brake coil and the brake state detection end of the MCU, and the resistance value of the second voltage-dividing resistor is more than 10 times of the internal resistance value of the electromagnetic brake coil. Preferably, a transient suppression diode is further connected in series between the electromagnetic brake coil and the ground, a cathode of the transient suppression diode is connect