CN-116730135-B - Elevator and control circuit, control method and computer storage medium thereof

Abstract

The embodiment of the application discloses an elevator control circuit, an elevator control method, an elevator and a computer storage medium, wherein the elevator control circuit comprises a frequency conversion module, a safety torque turn-off module, a safety loop module and a star sealing module, the frequency conversion module comprises a driver and an inverter, the inverter comprises a first bridge arm and a second bridge arm, and the first bridge arm and the second bridge arm are connected with the driver; the safety torque turn-off module is connected in series between the driver and the first bridge arm, the safety loop module is connected with the safety torque turn-off module, and the star sealing module is connected with the driver and the second bridge arm. When the elevator stops, the safety loop module controls the safety torque turn-off module to turn off so as to limit the driver to send a driving signal to the first bridge arm, and the driver sends a star sealing signal to the star sealing module so that the star sealing module controls the second bridge arm to seal the star, thereby avoiding the use of a main contactor and a star sealing contactor and further avoiding noise generated when the main contactor and the star sealing contactor act.

Inventors

• PAN MINJIE

Assignees

• 菱王电梯有限公司
• 广东美的暖通设备有限公司

Dates

Publication Date

20260505

Application Date

20230512

Claims (20)

1. 1. An elevator control circuit, comprising: The frequency conversion module comprises a driver and an inverter, wherein the inverter comprises a first bridge arm and a second bridge arm, and the first bridge arm and the second bridge arm are connected with the driver; the safety torque turn-off module comprises a switch circuit and a safety torque turn-off controller, wherein the switch circuit is connected in series between the driver and the first bridge arm; the safety loop module is connected with the switch circuit and used for controlling the on-off of the switch circuit; the star sealing module is connected with the driver and the second bridge arm; When the elevator stops, the safety loop module is used for controlling the switching circuit to be turned off so as to limit the driver to send a driving signal to the first bridge arm, and when the driver receives a feedback signal sent by the safety torque turn-off controller and used for controlling the switching circuit to be in a turn-off state, the driver sends a star sealing signal to the star sealing module so that the star sealing module controls the second bridge arm to seal a star.
2. 2. The elevator control circuit of claim 1, wherein the safety loop module comprises: A safety circuit connected to the safety torque shut-off module and the driver; the main controller is connected with the driver and the safety circuit and used for controlling the on-off of the safety circuit and monitoring the on-off state of the safety circuit; When at least one of the main controller and the driver sends a turn-off signal to the safety circuit, the safety circuit is turned off, so that the safety torque turn-off module is turned off.
3. 3. The elevator control circuit of claim 2, wherein the safety circuit comprises: the first safety switch is connected with the safety torque turn-off module; And the first logic circuit is connected with the first safety switch, the main controller and the driver and is used for controlling the first safety switch to be turned off according to a first turn-off signal so as to turn off the safety circuit.
4. 4. The elevator control circuit of claim 3, wherein the safety circuit further comprises: The second safety switch is connected with the first safety switch in series and is connected with the safety torque turn-off module; And the second logic circuit is connected with the second safety switch and the driver and is used for controlling the second safety switch to be turned off according to a second turn-off signal triggered by the star sealing signal.
5. 5. The elevator control circuit of claim 3, wherein the drive includes a drive signal output and a star signal output, the frequency conversion module further comprising: And the buffer is connected with the driving signal output end and the star sealing signal output end and is connected with the safety torque turn-off module and used for limiting the driver to send the driving signal to the first bridge arm and the second bridge arm according to the star sealing signal sent by the driver.
6. 6. The elevator control circuit of claim 1, wherein the switching circuit includes a first switching element and a second switching element that are connected in series and then interposed between the driver and the first leg, and wherein the first switching element and the second switching element are each connected to the safety loop module, and wherein the first switching element and the second switching element are each turned off when the safety loop module is turned off.
7. 7. The elevator control circuit of any of claims 1-6, further comprising: And the encoder is connected with the driver and is used for being connected with the traction machine to monitor the rotating speed of the traction machine and feeding back the rotating speed to the driver.
8. 8. A control method of an elevator, characterized in that it is applied to an elevator control circuit according to any one of claims 1-7, the control method of an elevator comprising: controlling the safety loop module to be turned off so as to enable the safety torque turn-off module to be turned off; and controlling the driver to send a star sealing signal to the star sealing module based on a feedback signal of the safety torque shut-off module in a shut-off state, so that the star sealing module controls the second bridge arm of the inverter to seal the star.
9. 9. The method of controlling an elevator according to claim 8, wherein the safety circuit module includes a main controller and a first safety switch, and the step of controlling the safety circuit module to be turned off to turn off the safety torque turn-off module includes: and sending a first turn-off signal to the first safety switch through at least one of the main controller and the driver to control the first safety switch to be turned off so as to turn off the safety torque turn-off module.
10. 10. The method of controlling an elevator according to claim 9, wherein the step of executing the feedback signal based on the safety torque shutdown module being in an off state to control the driver to send a star signal to the star block simultaneously or before further comprises: The driver sends a second turn-off signal triggered by the star seal signal to the first safety switch so that the first safety switch remains turned off, and/or, The frequency conversion module further comprises a buffer, and the step of executing the feedback signal based on the safety torque shutdown module in the shutdown state, and controlling the driver to send the star sealing signal to the star sealing module simultaneously or before further comprises the following steps: and controlling the buffer to limit the driver to send the driving signals to the first bridge arm and the second bridge arm.
11. 11. The method of controlling an elevator according to claim 8, wherein the safety loop module comprises a main controller, a first safety switch, and a second safety switch in series with the first safety switch; the step of controlling the safety circuit module to be turned off so that the safety torque turn-off module is turned off includes: transmitting a first turn-off signal to a first safety switch through at least one of the main controller and the driver to control the first safety switch to be turned off so as to turn off the safety torque turn-off module; executing the feedback signal based on the safety torque shutdown module in the shutdown state, and controlling the driver to send a star sealing signal to the star sealing module at the same time or before the step of sending the star sealing signal, further comprises: The driver sends a second turn-off signal triggered by the star sealing signal to the second safety switch so as to turn off the second safety switch, and/or, The frequency conversion module further comprises a buffer, and the step of executing the feedback signal based on the safety torque shutdown module in the shutdown state, and controlling the driver to send the star sealing signal to the star sealing module simultaneously or before further comprises the following steps: And the control buffer limits the driver to send the driving signals to the first bridge arm and the second bridge arm.
12. 12. The method of claim 8, wherein the elevator control circuit further comprises an encoder, and wherein the step of controlling the drive to send a star signal to the star block comprises: Acquiring encoder information output by the encoder, and acquiring the rotating speed of a traction machine of the elevator according to the encoder information; And controlling the driver to send the star sealing signal to the star sealing module based on the condition that the rotating speed is smaller than the preset rotating speed.
13. 13. The control method of an elevator according to claim 8, wherein the step of controlling the safety circuit module to be turned off to turn off the safety torque off module is preceded by the step of: And controlling the driver to stop outputting driving signals to the first bridge arm and the second bridge arm of the inverter.
14. 14. A control method of an elevator, characterized in that it is applied to an elevator control circuit according to any one of claims 1-7, the control method of an elevator comprising: the driver is controlled to send a star sealing removing signal to the star sealing module so that the star sealing module removes the star sealing state of the second bridge arm; and controlling the safety loop module to be conducted so as to conduct the safety torque shutoff module.
15. 15. The method of controlling an elevator according to claim 14, wherein the safety circuit module includes a main controller and a first safety switch, and the step of controlling the safety circuit module to be turned on to turn on the safety torque off module includes: And the driver and the main controller send a first conduction signal to the first safety switch, so that the first safety switch is controlled to be conducted, the safety loop module is conducted, and the safety torque turn-off module is conducted.
16. 16. The method of controlling an elevator according to claim 15, wherein the step of controlling the drive to send an unclamp signal to the star block is performed simultaneously with or after the step of controlling the drive to send an unclamp signal to the star block, further comprising: the buffer contact limit is controlled such that the driver may send the drive signal to the first leg and the second leg.
17. 17. The method of controlling an elevator of claim 14, wherein the safety loop module comprises a main controller, a first safety switch, and a second safety switch in series with the first safety switch; The step of controlling the safety loop module to be turned on so as to enable the safety torque turn-off module to be turned on includes: The driver and the main controller send a first conduction signal to the first safety switch, so that the first safety switch is controlled to be conducted, the safety loop module is conducted, and the safety torque turn-off module is conducted; Executing the control, the driver sends a star seal releasing signal to the star seal module, so that the star seal releasing module releases the star seal state of the second bridge arm at the same time or after, the method further comprises: the driver sends a second conduction signal triggered by the star-breaking signal to the second safety switch so as to control the second safety switch to be conducted, and/or, The frequency conversion module further includes a buffer, and the executing the controlling the driver to send a star seal releasing signal to the star seal module, so that the star seal releasing module releases the star seal state of the second bridge arm at the same time or after, and further includes: And controlling the buffer to release the limit so that the driver can send the driving signals to the first bridge arm and the second bridge arm.
18. 18. The method of controlling an elevator according to claim 14, wherein after the step of controlling the safety circuit module to be turned on to turn on the safety torque off module, further comprising: and based on a feedback signal of the safety torque turn-off module in a conducting state, controlling the driver to send driving signals to the first bridge arm and the second bridge arm of the inverter so that the inverter drives the traction machine of the elevator to work.
19. 19. Elevator, characterized by comprising an elevator control circuit according to any one of claims 1-8 or by performing the steps of the method according to any one of claims 8-18.
20. 20. A computer storage medium storing a plurality of instructions adapted to be loaded by a processor and to perform the steps of the method according to any of claims 8-18.

Description

Elevator and control circuit, control method and computer storage medium thereof Technical Field The application relates to the technical field of elevators, in particular to an elevator, a control circuit, a control method and a computer storage medium thereof. Background According to the type test specification requirements published in 2022, the elevator system needs to be equipped with a star-sealing brake technology. In the related technical field, the safety torque of the traction machine is mostly turned off by arranging a main contactor, and the star sealing contactor is arranged to seal the star of the traction machine, but the noise of the main contactor and the star sealing contactor is larger when each action is performed, so that the riding experience of the elevator is poorer. Disclosure of Invention The embodiment of the application provides an elevator, a control circuit, a control method and a computer storage medium thereof, and aims to realize the switching-off of a traction machine safety moment and the star sealing of the traction machine through the control circuit of the elevator, so that a main contactor and a star sealing contactor are not required to be used, and further noise generated when the main contactor and the star sealing contactor act is avoided. The embodiment of the application provides an elevator control circuit which comprises a frequency conversion module, a safety torque turn-off module, a safety loop module and a star sealing module, wherein the frequency conversion module comprises a driver and an inverter, the inverter comprises a first bridge arm and a second bridge arm, the first bridge arm and the second bridge arm are both connected with the driver, the safety torque turn-off module is connected between the driver and the first bridge arm in series, the safety loop module is connected with the safety torque turn-off module and is used for controlling the on-off of the safety torque turn-off module, the star sealing module is connected with the driver and is connected with the second bridge arm, and when an elevator stops, the safety loop module is used for controlling the safety torque turn-off module to turn off so as to limit the driver to send driving signals to the first bridge arm, and the driver sends star sealing signals to the star sealing module so that the star sealing module controls the second bridge arm. Based on the above embodiment, when the elevator is traveling, the safety loop module controls the safety torque turn-off module to be kept on, so that the driver can send driving signals to the first bridge arm and the second bridge arm to control the output power of the inverter, thereby controlling the rotating speed of the traction machine. When the elevator stops, the driver stops sending driving signals to the first bridge arm and the second bridge arm under the control of the safety loop module, and the safety loop module controls the safety torque shutoff module to be turned off, so that the driver is further limited to send driving signals to the first bridge arm, namely, the driver is further ensured not to send driving signals to the first bridge arm so as to ensure that the first bridge arm is in a turned-off state, and then the driver sends star sealing signals to the star sealing module, so that the star sealing module controls three switching tubes in the second bridge arm to be respectively conducted and form star connection, thereby realizing star sealing of the traction machine, namely, the switching-off of the safety torque of the traction machine and the star sealing of the traction machine can be realized through an elevator control circuit, thereby avoiding noise generated when the main contactor and the star sealing contactor act. In some embodiments, the safety loop module comprises a safety circuit and a main controller, wherein the safety circuit is connected with the safety torque shut-off module and the driver, the main controller is connected with the driver through a bus and is connected with the safety circuit and used for controlling the on-off of the safety circuit and monitoring the on-off state of the safety circuit, and when at least one of the main controller and the driver sends a first shut-off signal to the safety circuit, the safety circuit is shut off so that the safety torque shut-off module is shut off. According to the embodiment, when the elevator car stops, the main controller controls the driver to stop sending the driving signal, then at least one of the main controller and the driver sends a first turn-off signal to the safety circuit, so that the safety circuit is turned off, the safety torque turn-off module is turned off, the driver is further limited to send the driving signal to the first bridge arm, then the driver sends a star sealing signal to the star sealing module, the star sealing module controls the three switching tubes in the second bridge arm to be respectively conducted and form