CN115367575B - Elevator safety control device and control method thereof - Google Patents

Abstract

The embodiment of the application relates to the technical field of elevator control, and provides an elevator safety control device and a control method thereof.A power supply module of the elevator safety control device is used for supplying direct current to an inversion module through a positive electrode port and a negative electrode port, and a plurality of connection nodes of a first inversion unit and a second inversion unit of the inversion module are used for outputting alternating current for supplying power to a motor; when the elevator stops, the STO control module responds to a first STO enabling signal to control the switch module to disconnect a power supply path of the power supply module for providing direct current to the inversion module, and also responds to a second STO enabling signal to disconnect one of the first inversion unit or the second inversion unit; the star sealing control module responds to a star sealing enabling signal to enable the plurality of connection nodes to be short-circuited with the positive electrode port or the negative electrode port. The embodiment of the application is at least beneficial to realizing the safety braking of the elevator while keeping silence.

Description

Elevator safety control device and control method thereof

Technical Field

The embodiment of the application relates to the technical field of elevator control, in particular to an elevator safety control device and a control method thereof.

Background

The motor in the elevator traction machine is a device for converting electric energy into mechanical energy so that the traction machine drags an elevator car to operate, and the related technology of using the permanent magnet synchronous motor as the motor in the traction machine has received a great deal of attention in the elevator industry because the permanent magnet synchronous motor has the advantages of energy saving, small volume, stable low-speed operation, low noise, no maintenance and the like.

The star-sealing braking suitable for the permanent magnet synchronous motor means that: after the motor power is cut off, the motor power input end is short-circuited, and a braking torque is provided to prevent the traction machine from dragging the elevator to move rapidly. At present, the star sealing brake is usually realized by using a contactor, but the contactor has larger noise and higher cost, and is not beneficial to realizing the detection of the periodic star sealing brake function.

Disclosure of Invention

The embodiment of the application provides an elevator safety control device and a control method thereof, which are at least beneficial to realizing elevator safety braking while keeping silence.

An aspect of an embodiment of the present application provides an elevator safety control device, including: the power supply module comprises an anode port and a cathode port; the power supply module is used for providing direct current for the inversion module through the positive electrode port and the negative electrode port, the first driving unit is connected with the first inversion unit, the second driving unit is connected with the second inversion unit, a plurality of connection nodes of the first inversion unit and the second inversion unit are used for outputting alternating current for supplying power to the motor; the switching module is used for switching on or switching off a power supply path of the power supply module for providing direct current to the inversion module; the STO control module is used for responding to the first STO enabling signal to control the switch module to disconnect a power supply path of the power supply module for providing direct current to the inversion module when the elevator stops, and also responding to the second STO enabling signal to control the first driving unit or the second driving unit so as to disconnect one of the first inversion unit or the second inversion unit; the star sealing control module responds to a star sealing enabling signal to control the first driving unit or the second driving unit so as to conduct the other one of the first inversion unit or the second inversion unit, and the plurality of connecting nodes are short-circuited with the positive electrode port or the negative electrode port.

In some embodiments, the STO control module includes: and the first STO control unit is connected with the switch module and responds to the first STO enabling signal to control the switch module to disconnect a power supply path of the power supply module for providing direct current to the inverter module.

In some embodiments, the switch module comprises: the switch driving unit and the switch component are connected between the inversion module and the positive electrode port; the first STO control unit is connected with the switch driving unit, and the switch driving unit controls the switch component to be opened in response to an output signal of the first STO control unit.

In some embodiments, the switch module comprises: the switch driving unit and the switch component are connected between the inversion module and the negative electrode port; the first STO control unit is connected with the switch driving unit, and the switch driving unit controls the switch component to be opened in response to an output signal of the first STO control unit.

In some embodiments, the power module includes: the rectification unit is connected with the inversion module through an anode port and a cathode port, is connected with an alternating current power grid and is used for converting alternating current of the alternating current power grid into direct current provided for the inversion module; the switch module is positioned in a connecting line of the rectifying unit and the alternating current power grid.

In some embodiments, the STO control module includes: the second STO control unit is connected with the first driving unit and responds to the second STO enabling signal to control the first driving unit to drive the first inversion unit to be disconnected; the star sealing control module is connected with the second driving unit, and responds to a star sealing enabling signal to control the second driving unit to drive the second inversion unit to be conducted so that the plurality of connecting nodes are short-circuited with the negative electrode port.

In some embodiments, the STO control module includes: the second STO control unit is connected with the second driving unit and responds to a second STO enabling signal to control the second driving unit to drive the second inversion unit to be disconnected; the star sealing control module is connected with the first driving unit, and responds to a star sealing enabling signal to control the first driving unit to drive the first inversion unit to be conducted so that the plurality of connecting nodes are short-circuited with the positive electrode port.

Another aspect of the embodiments of the present application further provides a control method of an elevator safety control device, including providing any one of the above-mentioned elevator safety control devices, and providing direct current to a first inverter unit and a second inverter unit of an inverter module by using an anode port and a cathode port of a power supply module, where a plurality of connection nodes of the first inverter unit and the second inverter unit output alternating current provided for a motor by using the plurality of connection nodes; a power supply path for supplying direct current to the inversion module by using the switching module to turn on or off the power supply module; the inversion module further comprises a first driving unit connected with the first inversion unit and a second driving unit connected with the second inversion unit, and the elevator safety control device further comprises a STO control module and a star sealing control module; when the elevator stops, the STO control module responds to the first STO enabling signal to control the switch module to disconnect a power supply path for the power supply module to provide direct current for the inversion module, and also responds to the second STO enabling signal to control the first driving unit or the second driving unit to disconnect one of the first inversion unit or the second inversion unit, and the star sealing control module responds to the star sealing enabling signal to control the first driving unit or the second driving unit to conduct the other of the first inversion unit or the second inversion unit so as to enable the plurality of connection nodes to be short-circuited with the positive electrode port or the negative electrode port.

The technical scheme provided by the embodiment of the application has at least the following advantages:

in the above technical scheme, the power supply module comprises an anode port and a cathode port for outputting direct current, and the anode port and the cathode port are respectively connected with the first inversion unit and the second inversion unit of the inversion module and are used for providing direct current for the inversion module. When the elevator operates, the inversion module is used for inverting the direct current provided by the power supply module into alternating current, and the alternating current is provided to the input end of the motor through a plurality of connection nodes of the first inversion unit and the second inversion unit so as to enable the motor to operate. The switch module in the elevator safety control device is used for switching on or switching off a power supply path of the power supply module for providing direct current to the inversion module. The elevator safety control device comprises: the STO control module is used for controlling the turn-off of the dual-channel safe torque and the star sealing control module is used for controlling the electronic star sealing. The safe torque off refers to a braking mode in which a power supply is not applied to the motor to form a torque. Specifically, when the elevator stops, the STO control module receives the STO enabling signal, and the STO control module controls the switch module to disconnect the power supply path of the direct current provided by the power supply module to the inverter module so as to realize the safety torque disconnection of the first channel, and meanwhile, the STO control module also disconnects one inverter unit in the inverter module by controlling the driving unit connected with the one inverter unit so as to realize the safety torque disconnection of the second channel. And the star sealing control module receives a star sealing enabling signal, and controls a driving unit connected with another inversion unit to conduct another inversion unit in the inversion module, so that a plurality of connection nodes are connected with each other, and further the input end of the motor is in short circuit, and electronic star sealing is realized. That is, the embodiment of the application cancels the contactor with larger noise, realizes electronic star sealing by using one inversion unit in the inversion module for providing alternating current for the motor, and realizes the safety torque shutoff of double channels by using the other inversion unit and the switch module, thereby being beneficial to realizing the safety braking of the elevator while keeping silence and reducing the cost.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings are not to be taken in a limiting sense, unless otherwise indicated.

Fig. 1 is a schematic circuit diagram of an elevator safety control device according to an embodiment of the present application;

fig. 2 is a schematic circuit diagram of another elevator safety control device according to an embodiment of the present application;

Fig. 3 is a schematic circuit diagram of another elevator safety control device according to an embodiment of the present application;

fig. 4 is a schematic circuit diagram of another elevator safety control device according to an embodiment of the present application.

Detailed Description

As known from the background art, the star-sealing braking function of the motor in the elevator traction machine is usually realized by a contactor, but the contactor has the defects of high running noise, high cost and unfavorable periodic detection of the star-sealing function.

The inventor finds through analysis that an inversion unit in an inversion module of the elevator frequency converter is mainly formed by connecting IGBT (Insulated GateBipolar Transistor ), and noise generated in the working process of the IGBT is negligible. The elevator frequency converter is provided with two groups of inversion units, and if one group of inversion units in the elevator frequency converter is used for realizing electronic star sealing, silence can be ensured. However, when the elevator stops running, at least two channels of safe torque turn-off (STO: SAFETORQUE OFF) are needed to be simultaneously realized, namely, when the elevator stops running, at least two channels which are mutually independent are needed to cut off the power supply to the motor, and under normal conditions, two groups of inverter units in the frequency converter are used for realizing safe torque turn-off (the IGBTs in the two groups of inverter units are all turned off). If the electronic star seal is realized by using a group of inverter units (the IGBTs in the group of inverter units are all turned on), the safety torque turn-off cannot be realized by using a group of inverter units for realizing the electronic star seal. Therefore, the two-channel safety torque turn-off realized by using the two groups of inversion units and the electronic star seal realized by using one group of inversion units are mutually conflicting.

Based on the analysis, the embodiment of the application provides an elevator safety control device and a control method thereof. The elevator safety control device comprises a power supply module for outputting direct current through an anode port and a cathode port, wherein the anode port is adjacent to a first inversion unit of the inversion module, and the cathode port is connected with a second inversion unit of the inversion module and is used for providing direct current for the inversion module. When the elevator operates, the inversion module is used for inverting the direct current provided by the power supply module into alternating current, and the alternating current is provided to the input end of the motor through a plurality of connection nodes of the first inversion unit and the second inversion unit so as to enable the motor to operate. The elevator safety control device further includes: a switch module; the STO control module is used for controlling the turn-off of the dual-channel safe torque; and a star sealing control module for controlling the electronic star sealing is realized. Specifically, when the elevator stops, the STO control module receives a first STO enabling signal, the star sealing control module receives a star sealing enabling signal, the STO control module controls the switch module to disconnect a power supply path of direct current provided by the power supply module to the inversion module so as to realize the switching off of the first channel safe torque, meanwhile, the STO control module also disconnects one inversion unit in the inversion module by controlling a driving unit connected with one inversion unit so as to realize the switching off of the second channel safe torque, and the star sealing control module controls the driving unit connected with the other inversion unit to conduct the other inversion unit in the inversion module so as to enable a plurality of connecting nodes to be connected with each other, thereby shorting the input end of the motor and realizing electronic star sealing. Therefore, the embodiment of the application cancels the contactor with larger noise, realizes electronic star sealing by using one inversion unit in the frequency converter for providing alternating current for the motor, and realizes the safety torque shutoff of the double channels by using the other inversion unit and the switch module, thereby being beneficial to realizing the safety braking of the elevator while keeping silence and reducing the cost for forming the star sealing braking. In addition, if the alternating current provided by the inverter module for the elevator is normal, the normal function of the inverter module can be judged, and the star sealing function module can be judged to be normal due to the fact that the star sealing braking function is realized by using the inverter module, so that the periodic maintenance-free self-checking of the star sealing function is realized.

Embodiments of the present application will be described in detail below with reference to the attached drawings. However, it will be understood by those of ordinary skill in the art that in various embodiments of the present application, numerous specific details are set forth in order to provide a thorough understanding of the present application. The claimed application may be practiced without these specific details and with various changes and modifications based on the following embodiments. The following embodiments and features of the embodiments may be combined with each other without conflict.

Fig. 1 is a schematic circuit diagram of an elevator safety control device according to an embodiment of the present application; fig. 2 is a schematic circuit diagram of another elevator safety control device according to an embodiment of the present application; fig. 3 is a schematic circuit diagram of another elevator safety control device according to an embodiment of the present application; fig. 4 is a schematic circuit diagram of another elevator safety control device according to an embodiment of the present application.

Referring to fig. 1, an elevator safety control apparatus includes: the power supply module 100, the power supply module 100 includes a positive electrode port A1 and a negative electrode port A2; the inverter module 110, the inverter module 110 includes a first driving unit 111, a second driving unit 112, and a first inverter unit 113 and a second inverter unit 114 connected to each other, and the first inverter unit 113 is connected to the positive electrode port A1, the second inverter unit 114 is connected to the negative electrode port A2, the power supply module 100 is configured to provide direct current to the inverter module 110 through the positive electrode port A1 and the negative electrode port A2, the first driving unit 111 is connected to the first inverter unit 113, the second driving unit 112 is connected to the second inverter unit 114, the connection nodes of the first inverter unit 113 and the second inverter unit 114 are plural, and the plural connection nodes are configured to output alternating current for supplying power to the motor 120; a switching module 130, where the switching module 130 is used to turn on or off a power supply path of the power supply module 100 for providing direct current to the inverter module 110; the STO control module 140, when the elevator stops, the STO control module 140 controls the switching module 130 to disconnect a power supply path of the power supply module 100 to provide the direct current to the inverter module 110 in response to the first STO enable signal, and also controls the first driving unit 111 or the second driving unit 112 to disconnect one of the first inverter unit 113 or the second inverter unit 114 in response to the second STO enable signal; the star sealing control module 150, the star sealing control module 150 controls the first driving unit 111 or the second driving unit 112 in response to the star sealing enabling signal, so that the other one of the first inversion unit 113 or the second inversion unit 114 is conducted, and the plurality of connection nodes are short-circuited with the positive electrode port A1 or the negative electrode port A2.

In the embodiment of the application, the switch module 130 is arranged in the power supply path of the power supply module 100 for providing direct current to the inverter module 110, when the elevator stops running, the switch module 130 is utilized to realize the safety torque turn-off of the first channel, one inverter unit of the inverter module 110 in the frequency converter for providing alternating current for the motor 120 can be utilized to realize the safety torque turn-off of the second channel, and the other inverter unit of the inverter module 110 is utilized to realize the electronic star seal, so that the electronic star seal circuit is formed by utilizing the existing structure in the frequency converter of the elevator while the contactor with high noise is canceled, thereby being beneficial to reducing the setting cost of the star seal brake circuit, realizing the safety torque turn-off of the double channels while keeping silence, and being beneficial to ensuring the safety brake of the elevator. In addition, if the alternating current provided by the inverter module 110 for the elevator is normal, the inverter module 110 can be judged to be normal in function, and the star sealing function module can be judged to be normal due to the fact that the star sealing braking function is realized by using the inverter module 110, so that the periodic maintenance-free self-checking of the star sealing function is realized.

The power supply module 100 may be a device, an apparatus or a circuit for providing direct current, where the power supply module 100 outputs direct current with higher potential through the positive electrode port A1, and the power supply module 100 outputs direct current with lower potential through the negative electrode port A2, so as to output a direct current voltage with a certain magnitude.

In some embodiments, referring to fig. 1 and 3, the power supply module 100 is part of a frequency converter, i.e., the power supply module 100 includes: the rectification unit 101, the rectification unit 101 is connected with the inversion module 110 through the positive electrode port A1 and the negative electrode port A2, and the rectification unit 101 is connected with the alternating current network, and the rectification unit 101 is used for converting the alternating current of the alternating current network into direct current provided to the inversion module 110. The positive electrode port A1 may be a connection node between the inverter module 110 and the positive electrode dc bus in the frequency converter, and the positive electrode port A1 may be a connection node between the inverter module 110 and the negative electrode dc bus in the frequency converter. The rectifying unit 101 operates on the principle that: by utilizing the unidirectional conductivity of the diode, the diode is periodically turned on and off under the action of the alternating current, specifically, the diode is turned on in the positive half cycle of the alternating current, the output current is identical to the waveform shape of the voltage, and in the negative half cycle of the alternating current, the diode is in a reverse off state, and the output voltage is almost zero, so that the rectifying unit 101 outputs direct current.

Referring to fig. 1, the inverter module 110 includes a first inverter unit 113 connected to the positive electrode port A1 and a second inverter unit 114 connected to the negative electrode port A2, and in some embodiments, the first inverter unit 113 includes three switching devices, which may be IGBTs, connected in parallel with each other, and the 3 switching devices of the first inverter unit 113 are named T1, T2, and T3, respectively. Likewise, the second inverter unit 114 also includes three switching devices connected in parallel to each other, which may be IGBTs, and the 3 switching devices of the second inverter unit 114 are named T4, T5, and T6, respectively. Connection nodes of the first inverter unit 113 and the second inverter are U, V and W, respectively, and connection nodes U, V and W are connected with three-phase voltage input terminals of the motor 120, respectively. The first driving unit 111 of the inverter module 110 is connected with T1, T2, and T3 of the first inverter unit 113 for controlling on or off of T1, T2, and T3 based on the control signal, the second driving unit 112 of the inverter module 110 is connected with T4, T5, and T6 of the second inverter unit 114 for controlling on or off of T4, T5, and T6 based on the control signal, and the first driving unit 111 and the second driving unit 112 may be IGBT driving circuits having an isolation function and an amplifying function for the control signal. When the elevator is operated, the power supply module 100 transmits the direct current to the inverter module 110, and the first driving unit 111 and the second driving unit 112 may drive the first inverter unit 113 and the second inverter unit 114 of the inverter module 110 based on the control signal of the elevator operation, so that a specific IGBT in the inverter module 110 is turned on or off, so that the inverter module 110 inverts the direct current into the alternating current required for the operation of the motor 120, and provides the alternating current to the motor 120 through the connection nodes U, V and W.

Referring to fig. 1, the switch module 130 is configured to control the power supply path of the power supply module 100 to provide direct current to the inverter module 110, when the elevator is running, the power supply path of the power supply module 100 to provide direct current to the inverter module 110 is turned on by controlling the switch module 130, and when the elevator stops running, the power supply path of the power supply module 100 to provide direct current to the inverter module 110 is turned off by controlling the switch module 130, that is, the safety torque turn-off is realized by the switch module 130, so that the safety stop of the elevator is ensured.

In some embodiments, the switch module 130 may include a mechanical switch, which may be a safety relay or contactor, or a combination of a safety relay and a resistive device. In other embodiments, the switching module 130 may also include a power semiconductor switching device, for example, may include an IGBT, and the switching module 130 may also include a combined circuit of the power semiconductor device and a resistive device. The power semiconductor device is favorable for reducing the working noise of the switching device and further ensuring the mute operation of the elevator.

The elevator safety control device further comprises a control module for realizing a safety torque shut-off, i.e. a STO control module 140, and a star seal control module 150 for realizing an electronic star seal, the STO control module 140 being connected with the switching module 130 for forming a first channel safety torque shut-off, the STO control module 140 being further connected with one of the first drive unit 111 or the second drive unit 112 for forming a second channel safety torque shut-off, the star seal control module 150 being connected with the other of the first drive or the second drive unit 112 for forming an electronic star seal. The first channel safety torque turn-off means to turn off the power supply path of the power supply module 100 providing the direct current to the inverter module 110, taking the case that the STO control module 140 is connected with the first driving unit 111 to form the second channel safety torque turn-off, the second channel safety torque turn-off means that all three IGBTs in the first inverter unit 113 connected with the first driving unit 111 are turned off, that is, all T1, T2 and T3 are turned off, the electronic star seal means that all three IGBTs in the second inverter unit 114 connected with the second driving unit 112 are turned on, that is, all T4, T5 and T6 are turned on, and the connection nodes U, V and W connected with the ac input terminal of the motor 120 are connected with the negative electrode port A2, that is, the ac input terminal of the motor 120 is shorted. Similarly, when the STO control module 140 is connected to the second driving unit 112 to form a second channel for safe torque shutdown, the second safe torque shutdown channel means that all of the T4, T5 and T6 are disconnected, and all of the electronic star fingers T1, T2 and T3 are turned on.

When the elevator stops running, the STO control module 140 responds to the STO enabling signal to form a first channel safety torque shut-off and a second channel safety torque shut-off, and the star sealing module responds to the star sealing enabling signal to form an electronic star sealing.

Referring to fig. 1, in some embodiments, the STO control module 140 includes: and a first STO control unit 141, the first STO control unit 141 being connected to the switching module 130, the switching module 130 being controlled to disconnect a power supply path of the power supply module 100 supplying the dc power to the inverter module 110 in response to the first STO enable signal. Specifically, the STO enable signal includes a first STO enable signal, and when the elevator stops operating, the first STO control unit 141 controls the switching module 130 to disconnect a power supply path of the power supply module 100 to supply the dc power to the inverter module 110 in response to the first STO enable signal, forming a first path safety torque. The first STO control unit 141 also performs security authentication on the first STO enable signal, and outputs a control signal to the switch module 130 based on the first STO enable signal passing the security authentication, which is beneficial to avoiding misoperation and improving security of the elevator operation process.

Referring to fig. 1, in some embodiments, the switching module 130 includes: a switch driving unit 131 and a switch member 132, the switch member 132 being connected between the inverter module 110 and the positive electrode port A1; the first STO control unit 141 is connected to the switch driving unit 131, and the switch driving unit 131 controls the switching part 132 to be turned off in response to an output signal of the first STO control unit 141. The switch driving unit 131 is used for converting a control signal into a signal acting on the switching part 132 to drive the switching part 132 to be turned off or on, the switch driving unit 131 may have a function of amplifying the control signal, and the switching part 132 may be a mechanical switch or a semiconductor switching device. When the elevator stops running, the first STO control unit 141 responds to the first STO enable signal, after performing security authentication on the first STO enable signal, outputs a control signal to the switch driving unit 131 based on the first STO enable signal passing the security authentication, and the switch driving unit 131 amplifies and processes the control signal to act on the switch component 132, so that the switch component 132 disconnects the connection line between the inverter module 110 and the positive electrode port A1, and the direct current output by the power supply module 100 through the positive electrode port A1 cannot be supplied to the inverter module 110, so that the motor 120 disconnects the power supply source. Therefore, the switching part 132 located between the positive electrode port A1 and the power supply module 100 is beneficial to forming a first channel safety torque shut-off between the positive electrode port A1 and the power supply module 100, and the one channel safety torque shut-off is realized without using the inverter unit in the inverter module 110, so that the conflict of electronic star sealing and two channel safety torque shut-off by using the inverter module 110 is avoided.

Referring to fig. 2, in some embodiments, the switching module 130 includes: a switch driving unit 131 and a switch member 132, the switch member 132 being connected between the inverter module 110 and the negative electrode port A2; the first STO control unit 141 is connected to the switch driving unit 131, and the switch driving unit 131 controls the switching part 132 to be turned off in response to an output signal of the first STO control unit 141. The switching component 132 located between the negative electrode port A2 and the power supply module 100 is beneficial to forming a first channel safety torque shutdown between the negative electrode port A2 and the power supply module 100, that is, one channel safety torque shutdown is realized without using an inverter unit in the inverter module 110, and conflicts between electronic star sealing and two channel safety torque shutdown realized by using the inverter module 110 are avoided. Specifically, the switch driving unit 131 is configured to convert a control signal into a signal acting on the switching part 132 to drive the switching part 132 to be turned off or on, and the switch driving unit 131 may have a function of amplifying the control signal, and the switching part 132 may be a mechanical switch or a semiconductor switching device. When the elevator stops running, the first STO control unit 141 responds to the first STO enable signal, after performing security authentication on the first STO enable signal, outputs a control signal to the switch driving unit 131 based on the first STO enable signal passing the security authentication, and the switch driving unit 131 amplifies and processes the control and acts on the switch component 132, so that the switch component 132 disconnects the connection line between the inverter module 110 and the negative electrode port A2, the direct current output by the power supply module 100 through the negative electrode port A2 cannot be supplied to the inverter module 110, and the power supply source of the alternating current of the motor 120 is disconnected.

Referring to fig. 3, in some embodiments, the switching module 130 may also be located in the connection line of the rectifying unit 101 to the ac power grid. The switch module 130 located between the ac power grid and the rectifying unit 101 has a function of disconnecting the power supply path of the ac power grid to the rectifying unit 101, so that the power supply module 100 cannot output the dc power provided to the inverter module 110, that is, one-channel safe torque turn-off is realized without using the inverter unit in the inverter module 110, which is beneficial to avoiding the conflict between electronic star seal and two-channel safe torque turn-off by using the inverter module 110. Specifically, the switching module 130 may include a switching part 132 and a switching driving unit 131, the switching part 132 is connected in a connection line between the ac power grid and the rectifying unit 101, when the elevator stops running, the first STO control unit 141 responds to the first STO enable signal and performs security authentication on the first STO enable signal, the first STO control unit 141 outputs a control signal to the switching driving unit 131 based on the first STO enable signal passing the security authentication, and the switching driving unit 131 disconnects the switching part 132 under the action of the control signal, and disconnects a power supply path of the ac power grid to the rectifying unit 101. In other embodiments, the switching part 132 may be located inside the rectifying unit 101 under the condition that the switching part 132 has a function of disconnecting the power supply path of the power supply module 100 to provide the dc power supply path to the inverter module 110.

In some embodiments, the elevator safety control device may include a plurality of switch components 132, in one example, the elevator safety control device may include 2 switch components 132, where one switch component 132 is located between the positive electrode port A1 and the inverter module 110, and another switch component 132 is located between the negative electrode port A2 and the inverter module 110, which is advantageous in that when one switch component 132 fails, the safety torque turn-off can be achieved by using another switch component 132, so as to ensure the reliability of the safety torque turn-off formed by the switch component 132.

Referring to fig. 1, in some embodiments, the STO control module 140 includes: a second STO control unit 142, the second STO control unit 142 being connected to the first driving unit 111, controlling the first driving unit 111 to drive the first inversion unit 113 to be turned off in response to the second STO enable signal; the star sealing control module 150 is connected to the second driving unit 112, and responds to the star sealing enabling signal, controls the second driving unit 112 to drive the second inversion unit 114 to be turned on, so that the plurality of connection nodes are short-circuited with the negative electrode port A2. Wherein the second STO control unit 142 performs security authentication on the second STO enable signal and outputs a control signal to the first driving unit 111 based on the second STO enable signal passing the security authentication; the star seal control module 150 performs security authentication on the star seal enable signal, and outputs a control signal to the second driving unit 112 based on the star seal enable signal passing the security authentication, and the security authentication functions of the second STO control unit 142 and the star seal control module 150 are beneficial to avoiding misoperation and improving the security of the elevator operation process. Specifically, the STO enable signal further includes a second STO enable signal, when the elevator stops running, the second STO control unit 142 controls the first driving unit 111 to drive the first inverter unit 113 to be turned off in response to the second STO enable signal, so as to form a second channel safe torque turn-off, and the star sealing control module 150 controls the second driving unit 112 to drive the second inverter unit 114 to be turned on in response to the star sealing enable signal, so as to form an electronic star sealing. Under the condition that a contactor with high noise is eliminated, the second inversion unit 114 is utilized to realize electronic star sealing, so that safety braking of the elevator is realized while silence is guaranteed.

Referring to fig. 4, in some embodiments, the STO control module 140 includes: a second STO control unit 142, the second STO control unit 142 being connected to the second driving unit 112, controlling the second driving unit 112 to drive the second inverter unit 114 to be turned off in response to the second STO enable signal; the star sealing control module 150 is connected to the first driving unit 111, and responds to the star sealing enabling signal, and controls the first driving unit 111 to drive the first inversion unit 113 to be turned on, so that a plurality of connection nodes are short-circuited with the positive electrode port A1. Namely, under the condition that a contactor with high noise is cancelled, the first inversion unit 113 is utilized to realize electronic star sealing, the second inversion unit 114 is utilized to realize the safety torque shutoff of the second channel, and the safety braking of the elevator is also beneficial to ensuring silence. Specifically, the STO enable signal further includes a second STO enable signal, when the elevator stops running, the second STO control unit 142 controls the second driving unit 112 to drive the second inverter unit 114 to be turned off in response to the second STO enable signal, so as to form a second channel safe torque turn-off, and the star sealing control module 150 controls the first driving unit 111 to drive the first inverter unit 113 to be turned on in response to the star sealing enable signal, so as to form an electronic star sealing.

The elevator safety control device provided in the above embodiment includes the STO control module 140 for controlling the two-channel safety torque turn-off, the star seal control module 150 for controlling the electronic star seal, and the inverter module 110 in the frequency converter for providing the alternating current for the motor 120, where the inverter module 110 includes the first inverter unit 113 and the second inverter unit 114, the first STO control unit 141 in the STO control module 140 controls the switching module 130 formed by the non-inverter units to achieve the first channel safety torque turn-off based on the first STO enable signal, and the second STO control unit 142 in the STO control module 140 controls the one inverter unit to achieve the second channel safety torque turn-off based on the second STO enable signal, and the star seal control module 150 controls the other inverter unit to achieve the second channel safety torque turn-off based on the star seal enable signal. According to the elevator safety control device provided by the embodiment of the application, a mode that a contactor with larger noise forms a star sealing brake is eliminated, when the elevator stops, electronic star sealing is realized by using one inversion unit in a frequency converter for providing alternating current for the motor 120, and the safety torque of double channels is turned off by using the other inversion unit and the switch module 130, so that the elevator safety brake is realized while the silence is kept, the cost is reduced, in addition, if the alternating current provided by the inversion module 110 for the elevator is normal, the normal function of the inversion module 110 can be judged, and the normal star sealing function module can be judged and the periodic maintenance-free self-inspection of the star sealing function can be realized by using the inversion module 110 to realize the star sealing brake function.

In another aspect, the embodiment of the present application further provides a control method of an elevator safety control device using the elevator safety control device according to any one of the foregoing embodiments, and the control method of the elevator safety control device will be described in detail with reference to the accompanying drawings.

A control method of an elevator safety control apparatus, comprising providing the elevator safety control apparatus according to any one of the above, referring to fig. 1, supplying direct current to a first inverter unit 113 and a second inverter unit 114 of an inverter module 110 by using a positive electrode port A1 and a negative electrode port A2 of a power supply module 100, and outputting alternating current supplied to a motor 120 by using a plurality of connection nodes of the first inverter unit 113 and the second inverter unit 114; the switching module 130 is used to turn on or off a power supply path of the power supply module 100 for providing direct current to the inverter module 110; the inverter module 110 further includes a first driving unit 111 connected to the first inverter unit 113 and a second driving unit 112 connected to the second inverter unit 114, and the elevator safety control device further includes a STO control module 140 and a star-sealing control module 150; when the elevator stops, the STO control module 140 controls the switching module 130 to disconnect a power supply path of the power supply module 100 to provide the direct current to the inverter module 110 in response to the first STO enable signal, and also controls the first driving unit 111 or the second driving unit 112 to disconnect one of the first inverter unit 113 or the second inverter unit 114 in response to the second STO enable signal, and the star seal control module 150 controls the first driving unit 111 or the second driving unit 112 to turn on the other of the first inverter unit 113 or the second inverter unit 114 in response to the star seal enable signal, shorting the plurality of connection nodes to the positive electrode port A1 or the negative electrode port A2. The STO control module 140 is used for controlling the switch module 130 and controlling a driving unit to drive an inversion unit, so that the control of the two-channel safety torque turn-off is facilitated, and the star sealing control module 150 is used for controlling another driving unit to drive another inversion unit, so that the electronic star sealing is facilitated under the condition of removing the contactor with larger noise.

The control method of the elevator safety control device provided in the above embodiment uses the elevator safety control device that does not include the contactor with larger noise, realizes the dual-channel safety torque turn-off through the STO control module 140, a driving unit, an inversion unit and the switch module 130, realizes the electronic star seal through the star seal control module 150, another driving unit and another inversion unit, and is beneficial to realizing the safety brake of the elevator while keeping silent.

It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples of carrying out the invention and that various changes in form and details may be made therein without departing from the spirit and scope of the invention. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention is therefore intended to be limited only by the appended claims.

Claims (5)

1. An elevator safety control device, comprising:

the power supply module comprises an anode port and a cathode port;

The inverter module comprises a first driving unit, a second driving unit, a plurality of first inverter units and a plurality of second inverter units, wherein the first inverter units are connected with the positive electrode port, the second inverter units are connected with the negative electrode port, the power supply module is used for supplying direct current to the inverter module through the positive electrode port and the negative electrode port, the first driving unit is connected with the first inverter units, the second driving unit is connected with the second inverter units, the plurality of connection nodes of the first inverter units and the second inverter units are used for outputting alternating current for supplying power to a motor;

The switch module is used for switching on or switching off a power supply path of the direct current provided by the power supply module to the inversion module;

A STO control module that controls the switching module to disconnect a power supply path through which the power supply module supplies the direct current to the inverter module in response to a first STO enable signal when the elevator stops, and also controls the first driving unit or the second driving unit to disconnect one of the first inverter unit or the second inverter unit in response to a second STO enable signal;

The STO control module comprises a first STO control unit and a second STO control unit, the first STO control unit is connected with the switch module, and responds to the first STO enabling signal to control the switch module to disconnect a power supply path of the power supply module for providing the direct current to the inversion module; the second STO control unit is connected with one of the first driving unit or the second driving unit, and responds to the second STO enabling signal to control the first driving unit to drive the first inversion unit to be disconnected or control the second driving unit to drive the second inversion unit to be disconnected;

The star sealing control module responds to a star sealing enabling signal to control the first driving unit or the second driving unit so as to enable the other one of the first inversion unit or the second inversion unit to be conducted, and a plurality of connecting nodes are short-circuited with the positive electrode port or the negative electrode port;

the star sealing control module is connected with the other one of the first driving unit and the second driving unit, and responds to the star sealing enabling signal to control the first driving unit to drive the first inversion unit to be conducted or control the second driving unit to drive the second inversion unit to be conducted.

2. The elevator safety control device of claim 1, wherein the switch module comprises: a switch driving unit and a switch part connected between the inverter module and the positive electrode port; the first STO control unit is connected with the switch driving unit, and the switch driving unit controls the switch component to be turned off in response to an output signal of the first STO control unit.

3. The elevator safety control device of claim 1, wherein the switch module comprises: a switch driving unit and a switch part connected between the inverter module and the negative electrode port; the first STO control unit is connected with the switch driving unit, and the switch driving unit controls the switch component to be turned off in response to an output signal of the first STO control unit.

4. The elevator safety control device of claim 1, wherein the power module comprises:

The rectification unit is connected with the inversion module through the positive electrode port and the negative electrode port, and is connected with an alternating current network, and the rectification unit is used for converting alternating current of the alternating current network into direct current provided for the inversion module;

The switch module is positioned in a connecting line of the rectifying unit and the alternating current power grid.

5. A control method of an elevator safety control device, characterized by providing the elevator safety control device according to any one of claims 1 to 4, and providing direct current to a first inverter unit and a second inverter unit of an inverter module by using a positive electrode port and a negative electrode port of a power supply module, wherein a plurality of connection nodes of the first inverter unit and the second inverter unit are used, and outputting alternating current provided for a motor by using a plurality of the connection nodes;

switching on or off a power supply path of the direct current provided by the power supply module to the inversion module by using a switch module;

the inversion module further comprises a first driving unit connected with the first inversion unit and a second driving unit connected with the second inversion unit, and the elevator safety control device further comprises a STO control module and a star sealing control module;

When the elevator stops, the STO control module responds to a first STO enabling signal to control the switch module to disconnect a power supply path of the direct current provided by the power supply module to the inversion module, responds to a second STO enabling signal to control the first driving unit or the second driving unit to disconnect one of the first inversion unit or the second inversion unit, and responds to a star sealing enabling signal to control the first driving unit or the second driving unit to conduct the other of the first inversion unit or the second inversion unit so as to enable the plurality of connection nodes to be short-circuited with the positive electrode port or the negative electrode port.