CN115367575A - Elevator safety control device and control method thereof - Google Patents
Elevator safety control device and control method thereof Download PDFInfo
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- CN115367575A CN115367575A CN202210927624.2A CN202210927624A CN115367575A CN 115367575 A CN115367575 A CN 115367575A CN 202210927624 A CN202210927624 A CN 202210927624A CN 115367575 A CN115367575 A CN 115367575A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B1/00—Control systems of elevators in general
- B66B1/02—Control systems without regulation, i.e. without retroactive action
- B66B1/06—Control systems without regulation, i.e. without retroactive action electric
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B1/00—Control systems of elevators in general
- B66B1/34—Details, e.g. call counting devices, data transmission from car to control system, devices giving information to the control system
- B66B1/3415—Control system configuration and the data transmission or communication within the control system
- B66B1/3423—Control system configuration, i.e. lay-out
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/16—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B50/00—Energy efficient technologies in elevators, escalators and moving walkways, e.g. energy saving or recuperation technologies
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, wherein 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 for supplying 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 the star sealing enabling signal, and enables the plurality of connection nodes to be in short circuit 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
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 equipment for converting electric energy into mechanical energy to enable the traction machine to drag an elevator car to operate, and because the permanent magnet synchronous motor has the advantages of energy conservation, small size, stable low-speed operation, low noise, maintenance-free property and the like, the related technology of utilizing the permanent magnet synchronous motor as the motor in the traction machine is widely concerned in the elevator industry.
The star-sealing brake applicable to the permanent magnet synchronous motor is as follows: after the power supply of the motor is cut off, the input end of the power supply of the motor is short-circuited to provide braking torque so as to prevent the tractor from dragging the elevator to move quickly. At present, the contactor is generally used for realizing star-sealing braking, but the contactor has higher noise and higher cost, and is not beneficial to realizing regular star-sealing braking function detection.
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 embodiment of the present application provides an elevator safety control device on the one hand, includes: the power supply module comprises a positive electrode port and a negative electrode port; the power supply module is used for supplying direct current to 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 provided, and the plurality of connection nodes are used for outputting alternating current for supplying power to the motor; the switch module is used for switching on or off a power supply path for supplying direct current to the inversion module by the power supply module; the STO control module controls the switch module to disconnect a power supply path for supplying direct current to the inversion module by the power supply module in response to a first STO enabling signal when the elevator stops, and controls the first driving unit or the second driving unit in response to a second STO enabling signal to disconnect one of the first inversion unit or the second inversion unit; and the star sealing control module controls the first driving unit or the second driving unit in response to the star sealing enabling signal so as to enable the other of the first inversion unit or the second inversion unit to be conducted, and a plurality of connecting nodes are all in short circuit 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 for supplying direct current to the inverter module by the power supply module.
In some embodiments, a 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 a switch driving unit that controls the switching part to be turned off in response to an output signal of the first STO control unit.
In some embodiments, a 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 a switch driving unit that controls the switching part to be turned off in response to an output signal of the first STO control unit.
In some embodiments, the power module comprises: the rectification unit is connected with the inversion module through a positive electrode port and a negative electrode port and is connected with an alternating current power grid, and the rectification unit is used for converting alternating current of the alternating current power grid into direct current provided for the inversion module; the switch module is located in a connecting circuit 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 a 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, responds to a star sealing enabling signal, and controls the second driving unit to drive the second inversion unit to be conducted so that the plurality of connection nodes are all in short circuit 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, responds to a star sealing enabling signal, and controls the first driving unit to drive the first inversion unit to be conducted so that the plurality of connection nodes are all in short circuit with the positive port.
In another aspect, an embodiment of the present application further provides a control method for an elevator safety control device, including providing the elevator safety control device described in any one of the above, providing a plurality of connection nodes between a first inverter unit and a second inverter unit of a power supply module by using a positive port and a negative port of the power supply module, and outputting an ac power provided for a motor by using the plurality of connection nodes; a power supply path for supplying direct current to the inversion module by utilizing the switch module to switch on or off the power supply module; the elevator safety control device also comprises an STO control module and a satellite 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 for supplying direct current to the inversion module, and also responds to a 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, and 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 connect the other of the first inversion unit or the second inversion unit, so that the plurality of connection nodes are all in short circuit 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 solution, the power supply module includes an anode port and a cathode port for outputting the direct current, and the anode port and the cathode port are respectively connected to the first inverter unit and the second inverter unit of the inverter module, and are configured to provide the direct current for the inverter module. When the elevator runs, 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 the plurality of connecting nodes of the first inversion unit and the second inversion unit so that the motor runs. A switch module in the elevator safety control device is used for switching on or switching off a power supply path for supplying direct current to an inverter module by a power supply module. The elevator safety control device comprises: the STO control module is used for controlling the two-channel safe torque to be turned off and the satellite sealing control module is used for controlling the electronic satellite sealing. Wherein safe torque off refers to a braking mode in which power is not applied to the motor to create torque. Specifically, when the elevator stops, the STO control module receives an STO enabling signal, the STO control module controls the switch module to disconnect the power supply path of the power supply module to supply direct current to the inversion module so as to achieve safe torque shutoff of the first channel, and meanwhile, the STO control module also controls the drive unit connected with the inversion unit to disconnect the inversion unit in the inversion module so as to achieve safe torque shutoff of the second channel. And the star sealing control module receives a star sealing enabling signal, controls the driving unit connected with the other inversion unit to switch on the other inversion unit in the inversion module, enables the plurality of connection nodes to be connected with each other, further enables the input end of the motor to be in short circuit, and achieves electronic star sealing. That is to say, the great contactor of noise has been cancelled in this application embodiment, utilize and to provide an inversion unit among the contravariant module of alternating current for the motor and realize that the electron seals the star, and utilize another inversion unit and switch module to realize the safe torque of binary channels and turn-off, not only be favorable to keeping the safe braking of realizing the elevator when the silence, still be favorable to reduce cost, in addition, if the alternating current that the contravariant module provided for the elevator is normal, can judge that the contravariant module function is normal, owing to use the contravariant module to realize sealing the star braking function, thereby can judge that it is normal to seal the star function module, realize that regular seal the star function is exempted from to maintain the self-checking.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.
Fig. 1 is a schematic circuit structure diagram of an elevator safety control device provided in an embodiment of the present application;
fig. 2 is a schematic circuit diagram of another elevator safety control device provided in the embodiment of the present application;
fig. 3 is a schematic circuit diagram of another elevator safety control device provided in the embodiment of the present application;
fig. 4 is a schematic circuit structure diagram of another elevator safety control device provided in the embodiment of the present application.
Detailed Description
The background art shows that the star sealing braking function of the motor in the elevator traction machine is usually realized by adopting the contactor at present, but the contactor has the defects of higher running noise, higher cost and inconvenience for the periodic detection of the star sealing function.
The inventor finds that an inverter unit in an inverter module of an elevator frequency converter is mainly formed by connecting Insulated Gate Bipolar Transistors (IGBTs), and noise generated in the working process of the IGBTs can be ignored. Two groups of inversion units are arranged in the elevator frequency converter, and if a group of inversion units in the elevator frequency converter are used for realizing electronic star sealing, the mute can be ensured. However, when the elevator stops running, at least two channels of safe torque shutoff (STO: safe OFF) need to be realized at the same time, that is, at least two channels independent from each other need to be adopted to cut OFF the power supply provided to the motor when the elevator stops running, and normally, two groups of inverter units in the frequency converter are used to realize safe torque shutoff (to make IGBTs in the two groups of inverter units all disconnected). If the electronic star closure is realized by using one group of inversion units (the IGBTs in one group of inversion units are all turned on), the safe torque shutoff cannot be realized by using the group of inversion units for realizing the electronic star closure. Therefore, the safe torque shutoff of the double channels is realized by using the two groups of inversion units, and the mutual conflict of the electronic star sealing is realized by using the one group of inversion units.
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 a positive electrode port and a negative electrode port, the positive electrode port is adjacent to a first inversion unit of the inversion module, and the negative electrode port is connected with a second inversion unit of the inversion module and used for providing direct current for the inversion module. When the elevator runs, 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 the plurality of connecting nodes of the first inversion unit and the second inversion unit so that the motor runs. The elevator safety control device further includes: a switch module; the STO control module is used for controlling the two-channel safe torque shutoff; and the star sealing control module is used for controlling the electronic star sealing. 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 the power supply path of the direct current provided by the power supply module to the inversion module, so as to realize the safe torque shutoff of the first channel, and meanwhile, the STO control module also controls the driving unit connected with one inversion unit to disconnect one inversion unit in the inversion module, so as to realize the safe torque shutoff of the second channel, the star sealing control module controls the driving unit connected with the other inversion unit to connect the other inversion unit in the inversion module, so that a plurality of connecting nodes are connected with each other, and further the input end of the motor is in short circuit, and the electronic star sealing is realized. Therefore, the contactor with high noise is omitted, the electronic star sealing is realized by the aid of the inverter unit in the frequency converter for providing alternating current for the motor, and the dual-channel safe torque is turned off by the aid of the other inverter unit and the switch module, so that the elevator safety brake is realized while silence is kept, and the cost for forming star sealing brake is reduced. In addition, if the alternating current that the contravariant module provided for the elevator is normal, can judge that the contravariant module function is normal, because use the contravariant module to realize sealing the star braking function to can judge that sealing the star functional module is normal, realize that periodic sealing the star function is non-maintaining self-checking.
Embodiments of the present application will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that in the examples of the present application, numerous technical details are set forth in order to provide a better understanding of the present application. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
Fig. 1 is a schematic circuit structure diagram of an elevator safety control device provided in an embodiment of the present application; fig. 2 is a schematic circuit diagram of another elevator safety control device provided in the embodiment of the present application; fig. 3 is a schematic circuit diagram of another elevator safety control device provided in the embodiment of the present application; fig. 4 is a schematic circuit structure diagram of another elevator safety control device provided in the 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 terminal A1 and a negative terminal A2; the power supply module 100 is configured to provide direct current to the inverter module 110 through the positive port A1 and the negative 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, a plurality of connection nodes of the first inverter unit 113 and the second inverter unit 114 are provided, and the plurality of connection nodes are configured to output alternating current for supplying power to the motor 120; the switching module 130, the switching module 130 is used for switching on or off a power supply path of the power supply module 100 for supplying the direct current to the inverter module 110; an STO control module 140, wherein when the elevator stops, the STO control module 140 controls the switching module 130 to disconnect a power supply path through which the power supply module 100 supplies the direct current to the inverter module 110 in response to a first STO enable signal, and also controls the first driving unit 111 or the second driving unit 112 in response to a second STO enable signal, so that one of the first inverter unit 113 or the second inverter unit 114 is disconnected; and the satellite sealing control module 150, wherein the satellite sealing control module 150 responds to the satellite sealing enable signal to control the first driving unit 111 or the second driving unit 112, so that the other one of the first inverter unit 113 or the second inverter unit 114 is turned on, and the plurality of connection nodes are all in short circuit with the positive port A1 or the negative port A2.
In the embodiment of the present application, the switch module 130 is disposed in the power supply path through which the power supply module 100 provides direct current to the inverter module 110, when the elevator stops operating, the switch module 130 is used to achieve safe torque shutdown of the first channel, an inverter unit of the inverter module 110 in the frequency converter that provides alternating current for the motor 120 can be used to achieve safe torque shutdown of the second channel, and another inverter unit of the inverter module 110 is used to achieve electronic star sealing. 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 satellite sealing function module can be judged to be normal due to the fact that the satellite sealing braking function is achieved through the inverter module 110, and regular maintenance-free self-checking of the satellite sealing function is achieved.
The power supply module 100 may be a device, an apparatus, or a circuit that provides a direct current, the power supply module 100 outputs a direct current with a higher potential through the positive port A1, and the power supply module 100 outputs a direct current with a lower potential through the negative 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 comprises: the rectifier unit 101, the rectifier unit 101 is connected with the inverter module 110 through the positive terminal A1 and the negative terminal A2, and the rectifier unit 101 is connected with the ac power grid, and the rectifier unit 101 is used for converting the ac power of the ac power grid into the dc power provided to the inverter module 110. The positive port A1 may be a connection node between the inverter module 110 and the positive dc bus in the frequency converter, and the positive port A1 may be a connection node between the inverter module 110 and the negative dc bus in the frequency converter. The operating principle of the rectifying unit 101 is as follows: 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 and the voltage waveform have the same shape, and the diode is in the reverse cut-off state in the negative half cycle of the alternating current, and the output voltage is almost zero, so that the rectifying unit 101 outputs the direct current.
Referring to fig. 1, the inverter module 110 includes a first inverter unit 113 connected to a positive port A1 and a second inverter unit 114 connected to a negative port A2, and in some embodiments, the first inverter unit 113 includes three switching devices connected in parallel to each other, and the switching devices may be IGBTs, and 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, the switching devices may be IGBTs, and the 3 switching devices of the second inverter unit 114 are named T4, T5, and T6, respectively. The connection nodes of the first inverter unit 113 and the second inverter are U, V and W, respectively, and the connection nodes U, V and W are connected to the three-phase voltage input end of the motor 120, respectively. The first driving unit 111 of the inverter module 110 is connected to T1, T2, and T3 of the first inverter unit 113, and is configured to control 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 to T4, T5, and T6 of the second inverter unit 114, and is configured to control 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 amplification function for the control signal. When the elevator is running, 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 running, 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 an 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 used for controlling the power supply module 100 to provide a direct current power supply path to the inverter module 110, when the elevator operates, the power supply module 100 can be turned on to provide a direct current power supply path to the inverter module 110 by controlling the switch module 130, when the elevator stops operating, the power supply module 100 can be turned off to provide a direct current power supply path to the inverter module 110 by controlling the switch module 130, that is, the switch module 130 can be used for turning off the safety torque, so as to ensure the safety stop of the elevator.
In some embodiments, the switch module 130 may include a mechanical switch, which may be a safety relay or a contactor, or a combination of a safety relay and a resistance device. In other embodiments, the switch module 130 may also include a power semiconductor switch device, such as an IGBT, and the switch module 130 may also include a combination circuit of a power semiconductor device and a resistance device. The power semiconductor device is beneficial to reducing the working noise of the switching device and further ensuring the silent running of the elevator.
The elevator safety control device also comprises a control module for realizing safe torque shutoff, namely an STO control module 140, and a star-closing control module 150 for realizing electronic star closing, wherein the STO control module 140 is connected with the switch module 130 for forming first channel safe torque shutoff, the STO control module 140 is also connected with one of the first drive unit 111 or the second drive unit 112 for forming second channel safe torque shutoff, and the star-closing control module 150 is connected with the other of the first drive unit or the second drive unit 112 for forming electronic star closing. The first channel safe torque turn-off means that a power supply path for supplying direct current to the inverter module 110 by the power supply module 100 is disconnected, taking STO control module 140 connected with the first driving unit 111 to form second channel safe torque turn-off as an example, the second channel safe torque turn-off means that all three IGBTs in the first inverter unit 113 connected with the first driving unit 111 are disconnected, that is, all T1, T2 and T3 are disconnected, and the electronic star means that all three IGBTs in the second inverter unit 114 connected with the second driving unit 112 are connected, that is, all T4, T5 and T6 are connected, so that the connection nodes U, V and W connected with the alternating current input end of the motor 120 are connected with the negative electrode port A2, that is, the alternating current input end 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 safe torque shutdown, the second safe torque shutdown channel means that T4, T5, and T6 are all turned off, and the electronic star sealing fingers T1, T2, and T3 are all turned on.
When the elevator stops running, the STO control module 140 responds to the STO enabling signal to form first channel safe torque shutoff and second channel safe torque shutoff, and the star sealing module responds to the star sealing enabling signal to form electronic star sealing.
Referring to FIG. 1, in some embodiments, STO control module 140 includes: the first STO control unit 141, the first STO control unit 141 and the switching module 130 are connected, and in response to the first STO enable signal, the switching module 130 is controlled to disconnect a power supply path through which the power supply module 100 supplies the direct current to the inverter module 110. 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 the power supply path through which the power supply module 100 supplies the direct current to the inverter module 110 in response to the first STO enable signal, so as to form a first channel safety torque. Wherein, first STO control unit 141 still carries out safety certification to first STO enable signal to based on the first STO enable signal through safety certification output control signal to switch module 130, be favorable to avoiding the maloperation, improve the security of elevator operation process.
Referring to fig. 1, in some embodiments, the switch 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 with 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 to convert the control signal into a signal applied to 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 operating, the first STO control unit 141 responds to the first STO enable signal, after the first STO enable signal is subjected to security authentication, a control signal is output to the switch driving unit 131 based on the first STO enable signal passing the security authentication, the switch driving unit 131 amplifies and processes the control signal and then acts on the switch component 132, the switch component 132 disconnects a connection line between the inverter module 110 and the positive electrode port A1, direct current output by the power supply module 100 through the positive electrode port A1 cannot be provided for the inverter module 110, and then the motor 120 disconnects a power supply source. Therefore, the switch component 132 located between the positive electrode port A1 and the power supply module 100 is beneficial to form a first channel safe torque turn-off between the positive electrode port A1 and the power supply module 100, and the one-channel safe torque turn-off is realized without using an inverter unit in the inverter module 110, so that a conflict between an electronic seal and a two-channel safe torque turn-off by using the inverter module 110 is avoided.
Referring to fig. 2, in some embodiments, the switch module 130 includes: a switch driving unit 131 and a switch component 132, wherein the switch component 132 is connected between the inverter module 110 and the negative electrode port A2; the first STO control unit 141 is connected with 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 component 132 located between the negative port A2 and the power supply module 100 is beneficial to form a first channel safe torque turn-off between the negative port A2 and the power supply module 100, that is, under the condition that an inversion unit in the inversion module 110 is not used, a channel safe torque turn-off is realized, and the conflict of realizing electronic star sealing and two-channel safe torque turn-off by using the inversion module 110 is avoided. Specifically, the switch driving unit 131 is configured to convert the control signal into a signal applied to the switching component 132 to drive the switching component 132 to be turned off or on, the switch driving unit 131 may have a function of amplifying the control signal, and the switching component 132 may be a mechanical switch or a semiconductor switching device. When the elevator stops operating, the first STO control unit 141 responds to the first STO enable signal, after the first STO enable signal is subjected to security authentication, a control signal is output to the switch driving unit 131 based on the first STO enable signal passing the security authentication, the switch driving unit 131 amplifies and processes the control and then acts on the switch component 132, the switch component 132 disconnects a connection line between the inverter module 110 and the negative electrode port A2, direct current output by the power supply module 100 through the negative electrode port A2 cannot be provided for the inverter module 110, and then a power supply source of 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 grid. The switch module 130 located between the ac power grid and the rectification unit 101 has a function of disconnecting the power supply path of the ac power grid to the rectification unit 101, so that the power supply module 100 cannot output the direct current provided to the inversion module 110, that is, under the condition that the inversion unit in the inversion module 110 is not used, one-channel safe torque shutoff is realized, and the conflict between the electronic satellite sealing and the two-channel safe torque shutoff by using the inversion module 110 is favorably avoided. Specifically, the switching module 130 may include a switching component 132 and a switch driving unit 131, the switching component 132 is connected in a connection line between the ac power grid and the rectifying unit 101, when the elevator stops operating, 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 switch driving unit 131 based on the first STO enable signal passing the security authentication, and the switch driving unit 131 disconnects the switching component 132 under the action of the control signal, and disconnects a power supply path from the ac power grid to the rectifying unit 101. In other embodiments, the switching component 132 may also be located inside the rectifying unit 101 under the condition that the switching component 132 is ensured to have the function of disconnecting the power supply module 100 from providing the direct current 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, wherein one switch component 132 is located between the positive port A1 and the inverter module 110, and another switch component 132 is located between the negative port A2 and the inverter module 110, which is advantageous in that when one switch component 132 fails, the other switch component 132 may be used to achieve safe torque shutdown, which is beneficial to ensure the reliability of the switch component 132 in forming safe torque shutdown.
Referring to fig. 1, in some embodiments, STO control module 140 includes: the second STO control unit 142, the second STO control unit 142 is connected with the first driving unit 111, and controls the first driving unit 111 to drive the first inverter unit 113 to be disconnected in response to the second STO enable signal; the star-sealing control module 150 is connected to the second driving unit 112, and 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 that the plurality of connection nodes are all shorted with the negative terminal A2. 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-sealing control module 150 performs security authentication on the star-sealing enable signal, and outputs a control signal to the second driving unit 112 based on the star-sealing enable signal passing the security authentication, and the security authentication functions of the second STO control unit 142 and the star-sealing control module 150 are favorable for 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 operating, 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 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 electronic star sealing. Under the condition that a contactor with larger noise is cancelled, the second inversion unit 114 is utilized to realize electronic star sealing, so that the safety brake of the elevator is realized while silence is ensured.
Referring to FIG. 4, in some embodiments, STO control module 140 includes: a second STO control unit 142, wherein the second STO control unit 142 is connected to the second driving unit 112, and controls the second driving unit 112 to drive the second inverter unit 114 to be disconnected in response to a second STO enable signal; the star-sealing control module 150 is connected to the first driving unit 111, and 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 that the plurality of connection nodes are all in short circuit with the positive electrode port A1. Namely, under the condition that a contactor with larger noise is cancelled, the electronic star sealing is realized by using the first inverter unit 113, and the safe torque shutoff of the second channel is realized by using the second inverter unit 114, so that the mute is ensured, and the safe braking of the elevator is realized. Specifically, the STO enable signal further includes a second STO enable signal, when the elevator stops operating, the second STO control unit 142 responds to the second STO enable signal to control the second driving unit 112 to drive the second inverter unit 114 to be disconnected, so that the second channel safety torque is turned off, and the star sealing control module 150 responds to the star sealing enable signal to control the first driving unit 111 to drive the first inverter unit 113 to be connected, so that the electronic star sealing is formed.
The elevator safety control device provided by the above embodiment includes an STO control module 140 for controlling dual-channel safety torque shutoff, a star-closing control module 150 for controlling electronic star closing, and an inverter module 110 in a frequency converter for supplying alternating current to a motor 120, wherein the inverter module 110 includes a first inverter unit 113 and a second inverter unit 114, a first STO control unit 141 in the STO control module 140 realizes first-channel safety torque shutoff by controlling a switch module 130 formed by non-inverter units based on a first STO enable signal, a second STO control unit 142 in the STO control module 140 realizes second-channel safety torque shutoff by controlling one driving unit to drive one inverter unit based on a second STO enable signal, and the star-closing control module 150 realizes second-channel safety torque shutoff by controlling another driving unit to drive another inverter unit based on a star-closing enable signal. The elevator safety control device provided by the embodiment of the application cancels a mode of forming star-sealing braking by a contactor with larger noise, realizes electronic star sealing by utilizing an inversion unit in a frequency converter for providing alternating current for a motor 120 when an elevator stops, realizes double-channel safety torque turn-off by utilizing another inversion unit and a switch module 130, is not only favorable for realizing safety braking of the elevator while keeping silence, but also favorable for reducing cost, in addition, if the alternating current provided by the inversion module 110 for the elevator is normal, the inversion module 110 can be judged to have normal function, and the star-sealing braking function is realized by utilizing the inversion module 110, so that the star-sealing function module can be judged to be normal, and the regular maintenance-free self-checking of the star-sealing function is realized.
In another aspect, an embodiment of the present invention further provides a control method for an elevator safety control device using the elevator safety control device according to any one of the above embodiments, and the following will explain the control method for the elevator safety control device in detail with reference to the accompanying drawings, where it is to be noted that the same or corresponding parts as those in the foregoing embodiment may refer to the description of the foregoing embodiment, and no further description is provided below.
A control method of an elevator safety control device includes providing any one of the elevator safety control devices described above, referring to fig. 1, providing 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, wherein a plurality of connection nodes of the first inverter unit 113 and the second inverter unit 114 are provided, and outputting alternating current provided for a motor 120 by using the plurality of connection nodes; the switching module 130 is used to switch on or off a power supply path of the power supply module 100 for supplying the 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 an STO control module 140 and a satellite-sealing control module 150; when the elevator stops, the STO control module 140 controls the switch module 130 to disconnect the power supply path of the power supply module 100 supplying 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 in response to the second STO enable signal to disconnect one of the first inverter unit 113 or the second inverter unit 114, and the star-sealing control module 150 controls the first driving unit 111 or the second driving unit 112 in response to the star-sealing enable signal to conduct the other of the first inverter unit 113 or the second inverter unit 114, so that the plurality of connection nodes are all in short circuit with 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 one driving unit to drive one inversion unit, which is beneficial to realizing control of dual-channel safe torque turn-off, and the star sealing control module 150 is used for controlling the other driving unit to drive the other inversion unit, which is beneficial to realizing electronic star sealing under the condition of removing a contactor with larger noise.
According to the control method of the elevator safety control device provided by the embodiment, the elevator safety control device without a contactor with high noise is utilized, the dual-channel safety torque cutoff is realized through the STO control module 140, the driving unit, the inversion unit and the switch module 130, the electronic star sealing is realized through the star sealing control module 150, the other driving unit and the other inversion unit, and the elevator safety control device is favorable for realizing the safety braking of an elevator while keeping silence.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for 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 in practice. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
1. An elevator safety control device, comprising:
a power supply module comprising a positive port and a negative port;
the inverter module comprises a first driving unit, a second driving unit, a first inverter unit and a second inverter unit, wherein the first inverter unit is connected with the positive port, the second inverter unit is connected with the negative port, the power supply module is used for providing direct current for the inverter module through the positive port and the negative port, the first driving unit is connected with the first inverter unit, the second driving unit is connected with the second inverter unit, a plurality of connecting nodes of the first inverter unit and the second inverter unit are provided, and the plurality of connecting nodes are used for outputting alternating current for supplying power to the motor;
the switching module is used for switching on or off a power supply path for the power supply module to provide the direct current power for the inversion module;
an STO control module which controls the switching module to disconnect a power supply path of the power supply module to supply the direct current to the inverter module in response to a first STO enable signal and also controls the first driving unit or the second driving unit in response to a second STO enable signal to disconnect one of the first inverter unit or the second inverter unit when the elevator stops;
a satellite sealing control module, which responds to a satellite sealing enable signal to control the first driving unit or the second driving unit so as to enable the other one of the first inverter unit or the second inverter unit to be conducted, so that the plurality of connection nodes are all in short circuit with the positive port or the negative port.
2. The elevator safety control of claim 1, wherein the STO control module comprises:
the first STO control unit is connected with the switch module and controls the switch module to disconnect a power supply path of the power supply module for supplying the direct current to the inverter module in response to the first STO enabling signal.
3. The elevator safety control of claim 2, wherein 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 switching part to be turned off in response to an output signal of the first STO control unit.
4. The elevator safety control of claim 2, wherein 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 switching part to be turned off in response to an output signal of the first STO control unit.
5. The elevator safety control 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 power grid, and the rectification unit is used for converting alternating current of the alternating current power grid into direct current provided for the inversion module;
the switch module is located in a connection line between the rectifying unit and the alternating current power grid.
6. The elevator safety control of claim 1, wherein the STO control module comprises:
the second STO control unit is connected with the first driving unit and controls the first driving unit to drive the first inversion unit to be disconnected in response to the second STO enabling signal;
the star sealing control module is connected with the second driving unit, responds to the star sealing enabling signal, and controls the second driving unit to drive the second inversion unit to be conducted, so that the plurality of connection nodes are all in short circuit with the negative electrode port.
7. The elevator safety control of claim 1, wherein the STO control module comprises:
the second STO control unit is connected with the second driving unit and responds to the 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, responds to the star sealing enabling signal, and controls the first driving unit to drive the first inversion unit to be conducted, so that the plurality of connection nodes are all in short circuit with the positive port.
8. A control method of an elevator safety control device, characterized in that, the elevator safety control device of any one of claims 1 to 7 is provided, a positive electrode port and a negative electrode port of a power supply module are used for providing direct current to a first inversion unit and a second inversion unit of an inversion module, a plurality of connection nodes of the first inversion unit and the second inversion unit are provided, and a plurality of connection nodes are used for outputting alternating current provided for a motor;
a power supply path for supplying the direct current to the inversion module is switched on or off by utilizing a switch module;
the elevator safety control device also comprises an STO control module and a satellite-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 power supply module for providing the direct current for the inverter module, and also responds to a second STO enabling signal to control the first driving unit or the second driving unit so as to disconnect one of the first inverter unit or the second inverter unit, and the star-closing control module responds to a star-closing enabling signal to control the first driving unit or the second driving unit so as to enable the other one of the first inverter unit or the second inverter unit to be conducted, so that a plurality of connection nodes are all in short circuit with the positive electrode port or the negative electrode port.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210927624.2A CN115367575A (en) | 2022-08-03 | 2022-08-03 | Elevator safety control device and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210927624.2A CN115367575A (en) | 2022-08-03 | 2022-08-03 | Elevator safety control device and control method thereof |
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