Control device, elevator and control method

Abstract

The invention discloses a control device, an elevator and a control method. The control equipment is used for the elevator, the elevator comprises a band-type brake power supply and a brake, the band-type brake power supply is electrically connected with the brake and used for supplying power to the brake, the control equipment comprises a first control module, and the first control module comprises a first controller, a first power relay and a second power relay. The first power relay and the second power relay are connected to a circuit of the band-type brake power source and the brake in series, the first controller is electrically connected with the first power relay and the second power relay, and the first controller is configured to control the band-type brake power source to supply power to the brake according to the on-off states of the first power relay and the second power relay. Due to the fact that the power relay can bear large current and voltage, the power relay is arranged between the band-type brake power source and the brake, a large-power circuit can be controlled, the use range is widened, the price of the power relay is lower than that of a safety relay, and cost can be saved.

Description

Technical Field

[0001] The present application relates to the technical field of elevator control, and more specifically, to a control device, an elevator and a control method. Background Art

[0002] In the related art, vertical lifting equipment such as elevators and freight elevators are braked by means of a brake holding method, but this braking method requires multiple brake contactors, and the braking and releasing states of the brake are controlled by connecting and disconnecting multiple brake contactors, resulting in a longer brake response time.

[0003] At present, the brake contactor is replaced by the contact of the safety relay as the control switch of the brake power supply AC input voltage to reduce the action response time of the brake. However, the safety relay can only allow a smaller current to pass (such as 3A), the scope of application is relatively small and the cost of the safety relay is relatively high. Summary of the invention

[0004] Embodiments of the present application provide a control device, an elevator, and a control method.

[0005] A control device in one embodiment of the present application is used for an elevator, the elevator includes a brake power supply and a brake, the brake power supply is electrically connected to the brake and is used to supply power to the brake, the control device includes a first control module, the first control module includes a first controller, a first power relay and a second power relay, the first power relay and the second power relay are connected in series in a circuit between the brake power supply and the brake, the first controller is electrically connected to the first power relay and the second power relay, respectively, and the first controller is configured to control the brake power supply to supply power to the brake according to the on / off state of the first power relay and the second power relay.

[0006] An elevator in another embodiment of the present application includes a car, a brake and a control device, wherein the control device is used for the elevator, the elevator includes a brake power supply and a brake, the brake power supply is electrically connected to the brake and is used to supply power to the brake, the control device includes a first control module, the first control module includes a first controller, a first power relay and a second power relay, the first power relay and the second power relay are connected in series in the circuit between the brake power supply and the brake, the first controller is electrically connected to the first power relay and the second power relay, respectively, and the first controller is configured to control the brake power supply to supply power to the brake according to the on / off state of the first power relay and the second power relay.

[0007] A control method in one embodiment of the present application is applied to an elevator, the elevator comprising a brake power supply, a brake and a control device, the brake being used to brake the car. The control device comprises a first control module, the first control module comprises a first power relay and a second power relay, the first power relay and the second power relay are connected in series in a circuit between the brake power supply and the brake, the control method comprises obtaining the on / off state of the first power relay and the second power relay; and controlling the brake power supply to supply power to the brake according to the on / off state.

[0008] The control device, elevator and control method of the embodiment of the present application include a first control module, the first control module includes a first controller, a first power relay and a second power relay, the first power relay and the second power relay are connected in series on the circuit of the brake power supply and the brake, so that the power supply of the brake power supply to the brake is determined by the on-off state of the first power relay and the second power relay. Among them, the first controller can be electrically connected to the first power relay and the second power relay respectively, so that the first controller can obtain the on-off state of the first power relay and the second power relay, and then the first controller can control the brake power supply to supply power to the brake according to the on-off state of the first power relay and the second power relay. Since the power relay can withstand a large current and voltage, by setting a power relay between the brake power supply and the brake, it is possible to control the high-power circuit and increase the scope of use. In addition, the power relay is cheaper than the safety relay, which can save costs.

[0009] Additional aspects and advantages of the embodiments of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0011] Figure 1 is a schematic diagram of an elevator scene in some embodiments of the present application;

[0012] Figure 2 is a schematic diagram of the structure of a control device in certain embodiments of the present application;

[0013] Figure 3 is a schematic diagram of the structure of a control device in certain embodiments of the present application;

[0014] Figure 4 is a schematic diagram of the structure of a control device in certain embodiments of the present application;

[0015] Figure 5is a schematic diagram of the structure of a control device in certain embodiments of the present application;

[0016] Figure 6 is a schematic diagram of the structure of a control device in certain embodiments of the present application;

[0017] Figure 7 is a schematic diagram of the structure of a control device in certain embodiments of the present application;

[0018] Figure 8 is a schematic diagram of the structure of a control device in certain embodiments of the present application;

[0019] Fig. 9 It is a schematic diagram of the structure of a control device of certain embodiments of the present application.

[0020] Figure Number:

[0021] 1000, elevator; 100, control device; 10, first control module; 11, first controller; 12, first power relay; 121, first contact; 122, second contact; 13, second power relay; 131, third contact; 132, fourth contact; 14, safety circuit; 141, fourth switch; 15, first switch; 16, voltage sampling point; 17, third switch; 20, second control module; 21, optocoupler isolation circuit; 22, first contact state monitoring circuit; 23, second contact state monitoring circuit; 24, detection power supply; 25, converter; 26, second switch; 27, control circuit; 28, second controller; 29, driver; 30, third control module; 200, brake; 300, car; 400, brake power supply. DETAILED DESCRIPTION

[0022] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the embodiments of the present application, and cannot be understood as limiting the embodiments of the present application.

[0023] At present, for vertical lifting equipment such as elevators and freight elevators, when the elevator car carries % of the rated load and runs downward at the rated speed, only the brake should be able to stop the drive host from running, or when the elevator fails, it needs to be equipped with a structure for braking the brake, for example, braking by holding the brake, but this braking method requires multiple holding brake contactors, and the braking and release states of the brake are controlled by connecting and disconnecting the holding brake contactors, but the response time of the holding brake contactor is long, resulting in untimely braking of the brake; by using the contacts of the safety relay as the control switch of the AC input voltage of the holding brake power supply to replace the holding brake contactor for braking, the action response time of the brake can be reduced, but the safety relay can only allow a smaller current to pass (such as 3A), the scope of application is low and the cost of the safety relay is high.

[0024] In order to solve the above technical problems, an embodiment of the present application provides a control device 100.

[0025] See also Figure 1 , Figure 2 and Figure 3 A control device 100 according to one embodiment of the present application is used for an elevator 1000. The elevator 1000 includes a brake power supply 400 and a brake 200. The brake power supply 400 is electrically connected to the brake 200 and is used to supply power to the brake 200. The control device 100 includes a first control module 10. The first control module 10 includes a first controller 11, a first power relay 12 and a second power relay 13. The first power relay 12 and the second power relay 13 are connected in series in a circuit between the brake power supply 400 and the brake 200. The first controller 11 is electrically connected to the first power relay 12 and the second power relay 13, respectively. The first controller 11 is configured to control the brake power supply 400 to supply power to the brake 200 according to the on / off state of the first power relay 12 and the second power relay 13.

[0026] The brake power supply 400 may be a power supply provided by the mains power grid, and is used to provide voltage to the brake 200 of the elevator 1000 to control the start and stop of the brake 200 of the elevator 1000. The brake 200 may be a two-way thrust elevator 1000 brake 200. When the brake 200 is powered on, a two-way electromagnetic thrust is generated to separate the brake 200 from the elevator 1000 car 300. When the power is off, the electromagnetic force disappears, and under the action of the external brake spring pressure, a friction brake 200 with power-off braking is formed. The brake 200 is used to brake the elevator 1000 car 300.

[0027] Specifically, the control device 100 includes a first control module 10, which can be used to control the brake 200 to brake when the elevator 1000 fails, or the first control module 10 controls the elevator 1000 to rise, fall or stop when the elevator 1000 operates normally.

[0028] The first control module 10 includes a first controller 11, a first power relay 12, and a second power relay 13. The first controller 11 may be a microcontroller unit (MCU) of the elevator 1000, and is used as a main controller of the elevator 1000. For example, the first controller 11 may control the ascent, descent, and stop of the elevator 1000.

[0029] The first power relay 12 and the second power relay 13 may be single-pole double-position power relays, and the first controller 11 may control the brake power supply 400 to supply power to the brake 200 according to the on / off state of the first power relay 12 and the second power relay 13. For example, the first power relay 12 may be a K6 power relay, and the second power relay 13 may be a K6.1 power relay. The number of the first power relay 12 and the second power relay 13 may be multiple, which is not limited here, and the multiple first power relays 12 and the second power relays 13 are connected in series.

[0030] The first power relay 12 and the second power relay 13 are connected in series to the circuit of the brake power supply 400 and the brake 200 , that is, the current provided by the brake power supply 400 passes through the first power relay 12 and the second power relay 13 in sequence and then enters the brake 200 . The first controller 11 can be connected to the first power relay 12 and the second power relay 13 respectively, so that the first controller 11 can obtain the on and off states of the first power relay 12 and the second power relay 13, and then the first controller 11 can control the brake power supply 400 to supply power to the brake 200 when the first power relay 12 and the second power relay 13 are both in the connected state, and the brake 200 is in the released state after receiving the current. It should be noted that the released state of the brake 200 is that the brake 200 does not brake, and the elevator 1000 can operate normally; the first controller 11 can control the brake power supply 400 to be unable to transmit current to the brake 200 of the elevator 1000 when one of the first power relay 12 and the second power relay 13 is in the disconnected state. At this time, the brake 200 is powered off and is in a braking state. The brake 200 will brake the elevator 1000, causing the elevator 1000 to stop running.

[0031] Optionally, when the elevator 1000 needs to stop running, the first controller 11 notifies the brake power supply 400 to stop supplying power to the brake 200 through bus communication (for example, the bus communication can be UART protocol, SPI protocol, CAN protocol, etc.). This can avoid using a brake contactor to stop supplying power to the control circuit 27, avoid the problem of arcing of the brake contactor contacts, and reduce the noise generated by the brake contactor.

[0032] In this way, the first power relay 12 and the second power relay 13 are connected in series to the circuit of the brake power supply 400 and the brake 200, so that the power supply from the brake power supply 400 to the brake 200 is determined by the on-off state of the first power relay 12 and the second power relay 13. Among them, the first controller 11 can be electrically connected to the first power relay 12 and the second power relay 13 respectively, so that the first controller 11 can obtain the on-off state of the first power relay 12 and the second power relay 13, and then the first controller 11 can control the brake power supply 400 to supply power to the brake 200 according to the on-off state of the first power relay 12 and the second power relay 13. Since the power relay can withstand a large current and voltage, by arranging the power relay between the brake power supply 400 and the brake 200, the high-power circuit can be controlled and the scope of use can be increased. In addition, the power relay is cheaper than the safety relay, which can save costs.

[0033] See also Figure 2 and Figure 3 In some embodiments, the first control module 10 also includes an optocoupler isolation circuit 21, a first contact state monitoring circuit 22, and a second contact state monitoring circuit 23; or, the control device 100 includes a second control module 20, the second control module 20 includes an optocoupler isolation circuit 21, a first contact state monitoring circuit 22, a second contact state monitoring circuit 23 and a detection power supply 24, the optocoupler isolation circuit 21 and the first contact state monitoring circuit 22 are connected in series, and the first power relay 12 is electrically connected to the first controller 11 through the optocoupler isolation circuit 21 and the first contact state monitoring circuit 22; the detection power supply 24 is used to supply power to the second power relay 13, and the second power relay 13 is electrically connected to the first controller 11 through the second contact state monitoring circuit 23.

[0034] Specifically, the control device 100 includes a second control module 20 , which is used to control the power on or off of the brake 200 and can collect the on / off status of the first power relay 12 and the second power relay 13 , and transmit the on / off status to the first controller 11 .

[0035] The second control module 20 includes an optocoupler isolation circuit 21, a first contact state monitoring circuit 22, a second contact state monitoring circuit 23 and a detection power supply 24. Among them, the optocoupler isolation circuit 21 can convert the input signal into an optical signal through the photoelectric converter 25, and then convert the optical signal into an output signal through the photoelectric converter 25, thereby realizing electrical isolation between the input and the output. The first contact state monitoring circuit 22 can determine whether the first power relay 12 is in a normal working state by monitoring the state of the contact. For example, in a relay circuit, the state changes of the normally open contact and the normally closed contact can reflect the on-off state of the circuit. When the normally open contact is closed, it means that the circuit is powered on; when the normally open contact is disconnected, it means that the circuit is powered off. The optocoupler isolation circuit 21 can be connected in series with the first power relay 12, and the optocoupler isolation circuit 21 and the first contact state monitoring circuit 22 are connected in series, so that the optocoupler isolation circuit 21 can convert the high-voltage current of the brake power supply 400220V into a low-voltage current that can be supplied to the first contact state monitoring circuit 22. The first power relay 12 is electrically connected to the first controller 11 via the optocoupler isolation circuit 21 and the first contact state monitoring circuit 22 , so that the first controller 11 can receive the on / off state information of the contacts sent by the first contact state monitoring circuit 22 .

[0036] The detection power supply 24 can be used to supply power to the second power relay 13 when the first power relay 12 is in the disconnected state and the brake power supply 400 cannot supply current to the second power relay 13. The second power relay 13 can be electrically connected to the first controller 11 through the second contact state monitoring circuit 23, so that when the detection power supply 24 supplies power to the second power relay 13, the second contact state monitoring circuit 23 can send the on / off state information of the second power relay 13 to the first controller 11.

[0037] In certain embodiments, Figure 2 and Figure 3As shown, the optocoupler isolation circuit 21, the first contact state monitoring circuit 22, and the second contact state monitoring circuit 23 can be arranged in the first control module 10. The optocoupler isolation circuit 21 can be connected in series with the first power relay 12, and the optocoupler isolation circuit 21 and the first contact state monitoring circuit 22 are connected in series, so that the optocoupler isolation circuit 21 can convert the high voltage current of the brake power supply 400220V into a low voltage current that can be supplied to the first contact state monitoring circuit 22. The first power relay 12 is electrically connected to the first controller 11 through the optocoupler isolation circuit 21 and the first contact state monitoring circuit 22, so that the first controller 11 can receive the on-off state information of the contact sent by the first contact state monitoring circuit 22. The second power relay 13 can be electrically connected to the first controller 11 through the second contact state monitoring circuit 23, so that when the detection power supply 24 supplies power to the second power relay 13, the second contact state monitoring circuit 23 can send the on-off state information of the second power relay 13 to the first controller 11.

[0038] In this way, by setting the first contact state monitoring circuit 22 and the second contact state monitoring circuit 23, the on-off state information of the first power relay 12 and the second power relay 13 can be accurately obtained, so that the first controller 11 can timely control the brake 200 to brake or release.

[0039] See also Figure 2 and Figure 3 In some embodiments, the first power relay 12 includes a first contact 121 and a second contact 122, and the first contact 121 and the second contact 122 are connected to the first controller 11 through an optocoupler isolation circuit 21 and a first contact state monitoring circuit 22;

[0040] The second power relay 13 includes a third contact 131 and a fourth contact 132 , and the detection power supply 24 is electrically connected to the third contact 131 and the fourth contact 132 for supplying power to the third contact 131 and the fourth contact 132 , and the third contact 131 and the fourth contact 132 are connected to the first controller 11 via the second contact state monitoring circuit 23 .

[0041] Specifically, the first power relay 12 includes a first contact 121 and a second contact 122. The first contact 121 may be a normally closed contact, and the second contact 122 may be a normally open contact. The first contact 121 and the second contact 122 can be connected to the first controller 11 through the optocoupler isolation circuit 21 and the first contact state monitoring circuit 22, so that the first controller 11 can determine the on-off state of the first power relay 12 according to the on-off state of the first contact 121 and the second contact 122, and then control the brake power supply 400 to supply power to the brake 200 according to the on-off state.

[0042] The second power relay 13 includes a third contact 131 and a fourth contact 132. The third contact 131 may be a normally closed contact, and the fourth contact 132 may be a normally open contact. The detection power supply 24 can be electrically connected to the third contact 131 and the fourth contact 132, and is used to supply power to the third contact 131 and the fourth contact 132. The third contact 131 and the fourth contact 132 can be connected to the first controller 11 through the second contact state monitoring circuit 23, so that the first controller 11 can determine the on-off state of the second power relay 13 according to the on-off state of the third contact 131 and the fourth contact 132, and then control the brake power supply 400 to supply power to the brake 200 according to the on-off state.

[0043] In this way, by setting the first contact state monitoring circuit 22 to detect the on-off state of the first contact 121 and the second contact 122, and setting the second contact state monitoring circuit 23 to detect the on-off state of the third contact 131 and the fourth contact 132, the on-off state information of the first power relay 12 and the second power relay 13 can be accurately obtained, so that the first controller 11 can timely control the brake 200 to brake or release.

[0044] See also Figure 2 and Figure 3 In some embodiments, the second control module 20 includes a converter 25, which is electrically connected to the brake power supply 400 and is used to convert the AC power of the brake power supply 400 into DC power. The first power relay 12 and the second power relay 13 are set on the AC side of the converter 25 or the first power relay 12 and the second power relay 13 are set on the DC side of the converter 25.

[0045] Specifically, the second control module 20 also includes a converter 25, which can be a thermoelectric converter 25; the two ends of the converter 25 are respectively connected to the power supply of the elevator 1000 and the brake 200. When the power supply of the elevator 1000 is an AC power supply, the AC power flowing through the converter 25 can be converted into DC power by the converter 25, and the converted DC power is transmitted to the brake 200 of the elevator 1000.

[0046] The first power relay 12 and the second power relay 13 can be arranged on the AC side of the converter 25 or the first power relay 12 and the second power relay 13 can be arranged on the DC side of the converter 25. For example, the first contact 121 and the second contact 122 of the first power relay 12, the third contact 131 and the fourth contact 132 of the second power relay 13 can be arranged on the AC side of the converter 25; the first contact 121 and the second contact 122 of the first power relay 12, the third contact 131 and the fourth contact 132 of the second power relay 13 can be arranged on the DC side of the converter 25.

[0047] In some embodiments, the AC side of the converter 25 is set in the first power relay 12 and the second power relay 13, and when the elevator 1000 stops running, the first contact 121 of the first power relay 12 flows through the AC power, passes through the optocoupler isolation circuit 21 and the first contact state monitoring circuit 22, and the monitoring signal level is high (or low), and the first controller 11 monitors that the first power relay 12 is in the disconnected state, and the disconnected state is used for the electric control logic control of the elevator 1000. The third contact 131 of the second power relay 13 flows through the DC power increased by the detection power supply 24, passes through the second contact state monitoring circuit 23, and the monitoring signal level is high (or low), and the first controller 11 monitors that the second power relay 13 is in the disconnected state, and the disconnected state is used for the electric control logic control of the elevator 1000.

[0048] In some embodiments, the AC side of the converter 25 is set in the first power relay 12 and the second power relay 13, and when the elevator 1000 starts running, after the second contact 122 of the first power relay 12 is connected, the monitoring signal level jumps to a low level (or a high level) through the optocoupler isolation circuit 21 and the contact state monitoring circuit, and the first controller 11 monitors that the first power relay 12 is in a connected state and uses the connected state for the electric control logic control of the elevator 1000. The fourth contact 132 of the second power relay 13 flows through the AC power, and the monitoring signal level is a low level (or a high level) through the second contact state monitoring circuit 23, and the first controller 11 monitors that the second power relay 13 is in a connected state, and uses the connected state for the electric control logic control of the elevator 1000.

[0049] In some embodiments, the DC side of the converter 25 is set in the first power relay 12 and the second power relay 13, and when the elevator 1000 stops running, the first contact 121 of the first power relay 12 flows through the DC power, passes through the optocoupler isolation circuit 21 and the first contact state monitoring circuit 22, and the monitoring signal level is high (or low), and the first controller 11 monitors that the first power relay 12 is in the disconnected state, and the disconnected state is used for the electric control logic control of the elevator 1000. The third contact 131 of the second power relay 13 flows through the DC power increased by the detection power supply 24, passes through the second contact state monitoring circuit 23, and the monitoring signal level is high (or low), and the first controller 11 monitors that the second power relay 13 is in the disconnected state, and the disconnected state is used for the electric control logic control of the elevator 1000.

[0050] In some embodiments, the DC side of the converter 25 is set in the first power relay 12 and the second power relay 13, and when the elevator 1000 starts running, after the second contact 122 of the first power relay 12 is connected, the monitoring signal level jumps to a low level (or a high level) through the optocoupler isolation circuit 21 and the contact state monitoring circuit, and the first controller 11 monitors that the first power relay 12 is in a connected state and uses the connected state for the electric control logic control of the elevator 1000. The fourth contact 132 of the second power relay 13 flows through the DC power, and the monitoring signal level is a low level (or a high level) through the second contact state monitoring circuit 23, and the first controller 11 monitors that the second power relay 13 is in a connected state, and uses the connected state for the electric control logic control of the elevator 1000.

[0051] In this way, by setting the first power relay 12 and the second power relay 13 on the AC side of the converter 25 or setting the first power relay 12 and the second power relay 13 on the DC side of the converter 25, it can be applicable to a variety of elevator 1000 structures and improve the use range of the first power relay 12 and the second power relay 13.

[0052] See also Figure 2 and Figure 3 In some embodiments, the first control module 10 also includes a safety circuit 14 and a first switch 15. The safety circuit 14, the first switch 15, the first power relay 12 and the second power relay 13 are connected in series. The first controller 11 is connected to the first switch 15. The first controller 11 is configured to control the first switch 15 to be turned on or off. When the first switch 15 or the safety circuit 14 is disconnected, the first power relay 12 and the second power relay 13 are disconnected; when the first switch 15 and the safety circuit 14 are both turned on, the first power relay 12 and the second power relay 13 are turned on.

[0053] Specifically, the first control module 10 includes a safety circuit 14 and a first switch 15. The safety circuit 14 can be a safety circuit installed in the elevator 1000. For example, the safety circuit can be a safety switch set in each safety component of the elevator 1000, and the set safety switches are connected in series to jointly control a safety relay. The first switch 15 can be a logic control unit of the elevator 1000, such as the Q1 logic control unit, or the first switch 15 can also be a diode or a triode, etc.; the first switch 15 can receive a signal from the first controller 11 and control the conduction and disconnection of the first switch 15 through the signal. For example, the first switch 15 takes a diode as an example. When the diode receives a low-level signal sent by the first controller 11, the diode is in a cut-off state to disconnect the current in the circuit. The safety circuit 14, the first switch element 15, the first power relay 12 and the second power relay 13 are connected in series, so that when the safety circuit 14 or the first switch element 15 is disconnected, the first power relay 12 and the second power relay 13 are disconnected, and when the safety circuit 14 and the first switch element 15 are both turned on, the first power relay 12 and the second power relay 13 are turned on.

[0054] Optionally, when the elevator 1000 is in a standby state and no one is using it, the first power relay 12 and the second power relay 13 can be safety checked. For example, when the clock reaches midnight, the first controller 11 controls the on and off of the first switch 15, and energizes and deenergizes the first power relay 12 and the second power relay 13, so that the first controller 11 determines whether the first power relay 12 and the second power relay 13 are in a normal and controllable state by monitoring the braking state of the brake 200; when the elevator 1000 is in the standby time, the first power relay 12 and the second power relay 13 are kept disconnected, and after receiving the instruction for the elevator 1000 to run, the first power relay 12 and the second power relay 13 are kept on, so that the service life of the first power relay 12 and the second power relay 13 can be improved, and the safety of the elevator 1000 can be improved.

[0055] In this way, by controlling the conduction or disconnection of the safety circuit 14, the first switch 15, the first power relay 12 and the second power relay 13 included in the first control module 10, the current output by the brake power supply 400 in the elevator 1000 can be controlled to supply power to the brake 200 of the elevator 1000, and the noise in the elevator 1000 control device 100 can be reduced.

[0056] See also Figure 4In some embodiments, the first controller 11 is connected to a voltage sampling point 16 preset in the first control module 10. When the safety circuit 14 is disconnected, the voltage at the voltage sampling point 16 is a first preset voltage; when the safety circuit 14 is turned on, the voltage at the voltage sampling point 16 is a second preset voltage, which is greater than the first preset voltage. The first controller 11 is configured to obtain the voltage at the voltage sampling point 16, and control the brake 200 to brake when the voltage at the voltage sampling point 16 is the first preset voltage.

[0057] Specifically, a voltage sampling point 16 is preset in the first control module 10, and a device for collecting the voltage at the end of the safety circuit 14, such as a sampling chip, a voltmeter, etc., is set at the voltage sampling point 16; the voltage sampling point 16 is set on the line between the safety circuit 14 and the first switch 15, or the voltage sampling point 16 is set on the line between the first switch 15 and the second switch 26, and the voltage sampling point 16 is connected to the first controller 11, so that the first controller 11 can obtain the voltage at the end of the safety circuit 14 through the voltage sampling point 16. When the safety circuit 14 is disconnected, the voltage at the sampling point obtained by the first controller 11 is the first preset voltage, and the first controller 11 can control the brake power supply 400 to stop supplying power to the brake 200 of the elevator 1000; when the safety circuit 14 is on, the voltage at the sampling point obtained by the first controller 11 is the second preset voltage, and the value of the second preset voltage is greater than the value of the first preset voltage, and the first controller 11 can control the brake power supply 400 to supply power to the brake 200 of the elevator 1000.

[0058] In this way, the first controller 11 controls the brake power supply 400 to supply power to the brake 200 by detecting the voltage at the voltage sampling point 16. When the safety circuit 14 is suddenly disconnected, the first controller 11 monitors the voltage at the end of the safety circuit 14 to stop the brake power supply 400 from supplying power to the brake 200 of the elevator 1000, thereby shortening the response time of the braking action of the brake 200 of the elevator 1000 and reducing the noise in the control device 100 of the elevator 1000.

[0059] Please refer again Figure 2 and Figure 3 In some embodiments, the second control module 20 also includes multiple second switch elements 26 and multiple control lines 27, the multiple control lines 27 are used to connect the brake power supply 400 and the brake 200, and each third switch element 17 is respectively located in each control line 27. The second switch element 26 is configured to control the conduction or disconnection of the corresponding control line 27, and the first controller 11 is configured to control the conduction or disconnection of the multiple second switch elements 26.

[0060] Specifically, the second control module 20 includes a second switch 26 and a plurality of control lines 27, the plurality of control lines 27 are used to connect the brake power supply 400 and the brake 200, the second switch 26 can be a diode, a triode, etc., the number of the second switch 26 can be multiple, which is not limited here, one or more second switch 26 are respectively arranged on each control line 27, and the second switch 26 is connected to the first controller 11; one or more second switch 26 can control the corresponding control line 27 to be turned on or off, and the first controller 11 can control one or more second switch 26 to be turned on or off, so that the first controller 11 controls the corresponding control line 27 to be turned on or off by controlling the second switch 26. For example, the number of the second switch 26 is K1 and K2, respectively, the control line 27 corresponding to K1 is L1, the control line 27 corresponding to K2 is L2, L1 supplies power to the brake 200 of the elevator 1000, and L2 supplies power to another brake 200 of the elevator 1000. When the elevator 1000 performs a power detection on the brake 200 of the elevator 1000, the second switch 26K1 is turned on, the second switch 26K2 is turned off, and the control line 27L1 provides current to the brake 200 to obtain the braking condition of the elevator 1000 by the brake 200; when the elevator 1000 performs a power detection on the brake 200 of the elevator 1000, the second switch 26K2 is turned on, the second switch 26K1 is turned off, and the control line 27L2 provides current to the brake 200 to obtain the braking condition of the elevator 1000 by the brake 200 of the elevator 1000.

[0061] In this way, the first controller 11 controls the corresponding control line 27 to be turned on or off by controlling one or more second switch elements 26, thereby avoiding using the first power relay 12 and the second power relay 13 to control the on and off of multiple control lines 27 when the elevator 1000 is in a light load state, thereby improving the service life of the first power relay 12 and the second power relay 13, and reducing the noise in the elevator 1000 control device 100.

[0062] See also Figure 5 In some embodiments, the second control module 20 also includes a second controller 28, and multiple second switch elements 26 are connected to the first controller 11 through the second controller 28. The second controller 28 is configured to control the multiple second switch elements 26 to be turned on or off when receiving the first control signal of the first controller 11.

[0063] Specifically, the second control module 20 includes a second controller 28, which may be another microcontroller unit of the elevator 1000, and the number may be multiple, which is not limited here. The second controller 28 can be connected to one or more second switch elements 26, and is connected to the first controller 11, so that the first controller 11 is connected to one or more second switch elements 26 through the second controller 28. When the second controller 28 receives the first control signal sent by the first controller 11, it controls one or more second switch elements 26 to be turned on or off.

[0064] Optionally, the second controller 28 can continue to communicate with the first controller 11, and one or more second switch elements 26 are in an on state. When the second controller 28 does not receive communication information from the first controller 11, the second controller 28 can control one or more second switch elements 26 to disconnect.

[0065] In this way, the second controller 28 controls the conduction or disconnection of one or more second switch elements 26 by receiving the first control signal sent by the first controller 11. When the first controller 11 fails and cannot control the conduction and disconnection of multiple control lines 27, the second controller 28 can complete the conduction and disconnection of the multiple control lines 27 of the elevator 1000, thereby shortening the response time of the braking action of the brake 200 of the elevator 1000 and improving the safety of the operation of the elevator 1000.

[0066] Please refer again Figure 2 and Figure 3 In some embodiments, multiple second switch elements 26 are connected to a voltage sampling point 16 preset in the first control module 10. When the voltage at the voltage sampling point 16 is a first preset voltage, one or more of the multiple second switch elements 26 are disconnected; when the voltage at the voltage sampling point 16 is a second preset voltage, one or more of the multiple second switch elements 26 are turned on, and the second preset voltage is greater than the first preset voltage.

[0067] Specifically, one or more second switch elements 26 can be connected to the voltage sampling point 16 preset in the first control module 10. When the second switch element 26 obtains that the voltage at the voltage sampling point 16 is the first preset voltage, one or more second switch elements 26 will be disconnected, and one or more control lines 27 will be disconnected, so that the DC output of the control line 27 corresponding to the converter 25 can be cut off, and the converter 25 stops supplying power to the brake 200 of the elevator 1000; when the second switch element 26 obtains that the voltage at the voltage sampling point 16 is the second preset voltage, one or more second switch elements 26 will be turned on, and one or more control lines 27 will be turned on, so that the converter 25 can output DC through the corresponding control line 27 to supply power to the brake 200 of the elevator 1000. For example, the second switch element 26 can be a diode. When the diode receives a low level at the voltage sampling point 16, the diode is in a cut-off state, and the brake 200 starts to brake the elevator 1000; when the diode receives a high level at the voltage sampling point 16, the diode is in a conducting state, and the brake 200 starts to release the elevator 1000.

[0068] In this way, the conduction and disconnection of the second switch 26 are controlled by detecting the voltage at the voltage sampling point 16, and then the conduction and disconnection of the corresponding control line 27 are controlled. When the safety circuit 14 is suddenly disconnected, the second switch 26 monitors the voltage at the end of the safety circuit 14 to stop multiple control lines 27 from supplying power to the brake 200 of the elevator 1000, thereby shortening the response time of the braking action of the brake 200 of the elevator 1000.

[0069] See also Figure 6 In some embodiments, the second control module 20 includes a driver 29 , which is connected to the plurality of second switch elements 26 , and the driver 29 is configured to control one or more of the plurality of second switch elements 26 to be turned on or off.

[0070] Specifically, the second control module 20 includes a driver 29, which can be a reverse driver 29. The driver 29 is connected to one or more second switch elements 26, and the driver 29 can control one or more second switch elements 26 to be turned on or off, thereby controlling the converter 25 to supply power to the brake 200 of the elevator 1000.

[0071] In this way, by controlling one or more second switch elements 26 to be turned on or off through the driver 29, it is possible to avoid using the second switch element 26 to control the on and off of multiple control lines 27 when the elevator 1000 is in a light-load state, thereby increasing the service life of the second switch element 26.

[0072] See also Figure 7The driver 29 is connected to the voltage sampling point 16 preset by the first control module 10 and the first controller 11. The driver 29 is configured to control one or more of the plurality of second switch elements 26 to be turned on or off according to the first control signal of the first controller 11 and / or the voltage of the voltage sampling point 16.

[0073] Specifically, the driver 29 in the second control module 20 can be connected to the voltage sampling point 16 and the first controller 11 in the first control module 10, respectively, and the driver 29 can receive the first control signal of the first controller 11 and the voltage of the voltage sampling point 16, so that the driver 29 can control one or more of the plurality of second switch elements 26 to be turned on or off according to the first control signal of the first controller 11 and the voltage of the voltage sampling point 16. For example, the driver 29 can be connected to the voltage sampling point 16 and the first controller 11 respectively through the connection mode of "AND gate" logic, and when the driver 29 receives the second preset voltage of the voltage sampling point 16 and the first control signal indicating the conduction, the driver 29 can control one or more second switch elements 26 to be turned on; when the driver 29 receives the first control signal indicating the non-conduction or the voltage of the voltage sampling point 16 is the first preset voltage, the driver 29 can control one or more second switch elements 26 to be turned off.

[0074] In this way, by configuring the driver 29 to control one or more of the multiple second switch elements 26 to be turned on or off according to the first control signal of the first controller 11 and the voltage of the voltage sampling point 16, the response time of the braking action of the brake 200 of the elevator 1000 can be shortened and the safety of the operation of the elevator 1000 can be improved.

[0075] Optionally, see Figure 7 , the driver 29 may be connected to the first controller 11 ; and / or the driver 29 may be connected to the second controller 28 ; and / or the driver 29 may be connected to a preset voltage sampling point 16 .

[0076] Specifically, the driver 29 in the second module can be connected to the first controller 11, and the driver 29 can control the conduction and disconnection of the second switch element 26 according to the control information of the first controller 11; and / or the driver 29 can be connected to the second controller 28, and the driver 29 can control the conduction and disconnection of the second switch element 26 according to the control information of the second controller 28; and / or the driver 29 can be connected to the voltage sampling point 16, and the driver 29 can control the conduction and disconnection of the second switch element 26 according to the voltage of the voltage sampling point 16.

[0077] See also Figure 8In some embodiments, multiple brakes 200 are connected to the first controller 11, and the first controller 11 is configured to obtain the braking status of the multiple brakes 200 and control the output voltage of the power supply in the elevator 1000 according to the braking status.

[0078] Specifically, the number of brakes 200 of the elevator 1000 is multiple, and it should be noted that the number of brakes 200 is greater than or equal to two, and the multiple brakes 200 are connected to the first controller 11 through the bus. The first controller 11 can obtain the braking status of the multiple brakes 200, and the braking status of the brakes 200 is respectively a braking state or an unbraking state, and the first controller 11 can control the output voltage of the power supply in the elevator 1000 according to the braking status of the brakes 200. For example, when the state of the brake 200 is in the state of transitioning from the braking state to the unbraking state, the power supply in the elevator 1000 is a starting voltage of 110V, and then when the state of the brake 200 is in the unbraking state, the power supply in the elevator 1000 is a maintenance voltage of 80V.

[0079] Optionally, the first controller 11 controls the power supply in the second control module 20 by issuing a first control signal. At this time, the first control module 10 can determine the braking state of the brake 200 of the elevator 1000, and issue a prompt message when the braking state of the brake 200 does not conform to the braking state corresponding to the first control signal; or, when the braking state of the brake 200 does not conform to the braking state corresponding to the first control signal, the first controller 11 further controls the power supply in the elevator 1000, for example, the first controller 11 controls the first switch element 15 to disconnect and the first controller 11 controls the second switch element 26 to disconnect.

[0080] In this way, the first controller 11 can form a closed-loop control of the voltage switching of the power supply in the elevator 1000 by controlling the output voltage of the power supply in the elevator 1000 according to the braking state.

[0081] Please refer again Figure 2 and Figure 3 In some embodiments, the control device 100 also includes a third control module 30, and the first controller 11 is connected to the car 300 of the elevator 1000 through the third control module 30, and the third control module 30 is configured to control the operation of the car 300 according to the second control signal sent by the first controller 11.

[0082] Specifically, the control device 100 includes a third control module 30, which may be a drive inverter, a security torque off (STO) or a main contactor of the elevator 1000. The first controller 11 may be connected to the car 300 of the elevator 1000 through the third control module 30, and the third control module 30 may control the operation of the car 300 according to the second control signal sent by the first controller 11. For example, the first switch 15, the first power relay 12 and the second power relay 13 are turned on according to the second control signal sent by the first controller 11, so that the power supply in the elevator 1000 inputs current into the control circuit 27, and the control circuit 27 transmits current to the brake 200, so that the brake 200 is energized. The first controller 11 obtains the braking state of the brake 200, and enables the third control module 30 to control the operation of the car 300 according to the second control signal sent by the first controller 11 through the bus.

[0083] See also Figure 8 In some embodiments, the first control module 10 includes a third switch element 17 , which connects the second power relay 13 and the third control module 30 , and the third switch element 17 is configured to control the operation of the car 300 according to the on / off state of the second power relay 13 .

[0084] Specifically, the first control module 10 includes a third switch 17, which may be a logic control unit of the elevator 1000, such as a Q2 logic control unit, or a diode or a triode, etc. The third switch 17 can connect the second power relay 13 and the third control module 30, and the third switch 17 is configured to control the operation of the car 300 according to the on / off state of the second power relay 13.

[0085] In this way, the third control module 30 can control the operation of the car 300 according to the on / off state of the second power relay 13, which can shorten the response time of the braking action of the brake 200 of the elevator 1000 and improve the safety of the operation of the elevator 1000.

[0086] See also Fig. 9 In some embodiments, the safety circuit 14 includes one or more fourth switch elements 141, and the one or more fourth switch elements 141 are connected in series. When any fourth switch element 141 is disconnected, the safety circuit 14 is disconnected.

[0087] Specifically, the safety circuit 14 includes a fourth switch 141, which may be a diode, a triode, etc. The number of the fourth switch 141 may be multiple, which is not limited here. The multiple fourth switch 141 is connected in series in the safety circuit 14, that is, when any of the multiple fourth switch 141 is disconnected, the safety circuit 14 is also disconnected.

[0088] In this way, by connecting one or more fourth switch elements 141 in the safety circuit 14 in series, the safety circuit 14 can be directly disconnected when a fault occurs in the elevator 1000, thereby shortening the response time of the brake 200 in initiating a braking action.

[0089] Please refer again Figure 1 , Figure 2 and Figure 3 The elevator 1000 of one embodiment of the present application includes a brake power supply 400, a car 300, a brake 200 and a control device 100, wherein the brake 200 is used to brake the car 300. The control device 100 includes a first control module 10, wherein the first control module 10 includes a first controller 11, a first power relay 12 and a second power relay 13, wherein the first power relay 12 and the second power relay 13 are connected in series to the circuit of the brake power supply 400 and the brake 200, and the first controller 11 is electrically connected to the first power relay 12 and the second power relay 13 respectively, and the first controller 11 is configured to control the brake power supply 400 to supply power to the brake 200 according to the on / off state of the first power relay 12 and the second power relay 13. For the sake of brevity, it will not be described in detail here.

[0090] See also Figure 1 , Figure 2 and Figure 3 A control method of an embodiment of the present application is applied to an elevator 1000. The elevator 1000 includes a brake power supply 400, a brake 200 and a control device 100. The control device 100 includes a first control module 10. The first control module 10 includes a first power relay 12 and a second power relay 13. The first power relay 12 and the second power relay 13 are connected in series in a circuit between the brake power supply 400 and the brake 200. The control method includes obtaining the on-off state of the first power relay 12 and the second power relay 13; and controlling the brake power supply 400 to supply power to the brake 200 according to the on-off state.

[0091] Specifically, the control method obtains the on / off status of the first power relay 12 and the second power relay 13 through the first controller 11; and the first controller 11 can control the brake power supply 400 to supply power to the brake 200 according to the on / off status, so that the control method can realize braking and releasing of the brake 200 through the first controller 11.

[0092] In the description of this specification, the descriptions with reference to the terms "certain embodiments", "in an example", "exemplarily", etc., mean that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0093] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0094] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A control device for an elevator, characterized in that: The elevator includes a brake power supply and a brake, wherein the brake power supply is electrically connected to the brake and is used to supply power to the brake, and the control device includes: A first control module, the first control module includes a first controller, a first power relay and a second power relay, the first power relay and the second power relay are connected in series on the circuit of the brake power supply and the brake, the first controller is electrically connected to the first power relay and the second power relay respectively, and the first controller is configured to control the brake power supply to supply power to the brake according to the on / off state of the first power relay and the second power relay.

2. The control device according to claim 1, characterized in that The first control module further includes an optical coupling isolation circuit, a first contact state monitoring circuit, and a second contact state monitoring circuit; or, The control device includes a second control module, the second control module includes an optocoupler isolation circuit, a first contact state monitoring circuit, a second contact state monitoring circuit and a detection power supply, the optocoupler isolation circuit and the first contact state monitoring circuit are connected in series, and the first power relay is electrically connected to the first controller through the optocoupler isolation circuit and the first contact state monitoring circuit; The detection power supply is used to supply power to the second power relay, and the second power relay is electrically connected to the first controller through the second contact state monitoring circuit.

3. The control device according to claim 2, characterized in that The first power relay comprises a first contact and a second contact, and the first contact and the second contact are connected to the first controller through the optical coupling isolation circuit and the first contact state monitoring circuit; The second power relay includes a third contact and a fourth contact, the detection power supply is electrically connected to the third contact and the fourth contact for supplying power to the third contact and the fourth contact, and the third contact and the fourth contact are connected to the first controller via the second contact status monitoring circuit.

4. The control device according to claim 2, characterized in that The second control module includes a converter, which is electrically connected to the brake power supply and is used to convert the AC power of the brake power supply into DC power. The first power relay and the second power relay are arranged on the AC side of the converter or the first power relay and the second power relay are arranged on the DC side of the converter.

5. The control device according to claim 1, characterized in that The first control module also includes a safety circuit and a first switch component, the safety circuit, the first switch component, the first power relay and the second power relay are connected in series, the first controller is connected to the first switch component, and the first controller is configured to control the first switch component to be turned on or off. When the first switch component or the safety circuit is disconnected, the first power relay and the second power relay are disconnected; when the first switch component and the safety circuit are both turned on, the first power relay and the second power relay are turned on.

6. The control device according to claim 5, characterized in that The first controller is connected to a voltage sampling point preset in the first control module, and when the safety circuit is disconnected, the voltage at the voltage sampling point is a first preset voltage; When the safety circuit is turned on, the voltage at the voltage sampling point is a second preset voltage, and the second preset voltage is greater than the first preset voltage; The first controller is configured to obtain the voltage at the voltage sampling point, and control the brake to brake when the voltage at the voltage sampling point is a first preset voltage.

7. The control device according to claim 2, characterized in that The second control module also includes multiple second switch elements and multiple control lines, the multiple control lines are used to connect the brake power supply and the brake, each second switch element is located in each control line respectively, the second switch element is configured to control the conduction or disconnection of the corresponding control line, and the first controller is configured to control the conduction or disconnection of the multiple second switch elements.

8. The control device according to claim 7, characterized in that The second switch element is a diode or a transistor.

9. The control device according to claim 7, characterized in that: The plurality of second switch elements are connected to the first controller.

10. The control device according to claim 7, characterized in that The second control module also includes a second controller, and the plurality of second switch elements are connected to the first controller via the second controller. The second controller is configured to control the plurality of second switch elements to be turned on or off upon receiving a first control signal from the first controller.

11. The control device according to claim 7, characterized in that The plurality of second switch elements are connected to a voltage sampling point preset in the first control module, and when the voltage at the voltage sampling point is a first preset voltage, one or more of the plurality of second switch elements are disconnected; When the voltage at the voltage sampling point is a second preset voltage, one or more of the plurality of second switch elements are turned on, and the second preset voltage is greater than the first preset voltage.

12. The control device according to claim 7 or 10, characterized in that: The second control module includes a driver connected to each of the plurality of second switch elements, and the driver is configured to control one or more of the plurality of second switch elements to be turned on or off.

13. The control device according to claim 12, characterized in that The driver is connected to both the voltage sampling point preset by the first control module and the first controller, and is configured to control one or more of the plurality of second switch elements to be turned on or off according to a first control signal of the first controller and / or the voltage at the voltage sampling point.

14. The control device according to claim 1, characterized in that The plurality of brakes are connected to the first controller, and the first controller is configured to obtain the braking status of the plurality of brakes and control the output voltage of the brake power supply according to the braking status.

15. The control device according to claim 1, characterized in that The control device includes a third control module, the first controller is connected to the elevator car through the third control module, and the third control module is configured to control the operation of the car according to a second control signal sent by the first controller.

16. The control device according to claim 15, characterized in that The first control module includes a third switch element, the third switch element is connected to the second power relay and the third control module, and the third switch element is configured to control the operation of the car according to the on-off state of the second power relay.

17. The control device according to claim 5, characterized in that The safety circuit comprises one or more fourth switch elements, and the one or more fourth switch elements are connected in series. When any one of the fourth switch elements is disconnected, the safety circuit is disconnected.

18. An elevator, characterized in that: It comprises a brake power supply, a car, a brake and a control device according to any one of claims 1 to 17, wherein the brake is used for braking the car.

19. A control method, characterized in that: Applied to an elevator, the elevator includes a brake power supply, a brake and a control device, the control device includes a first control module, the first control module includes a first power relay and a second power relay, the first power relay and the second power relay are connected in series in a circuit between the brake power supply and the brake, and the control method includes: Obtaining the on / off status of the first power relay and the second power relay; The holding brake power supply is controlled to supply power to the brake according to the on / off state.

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