CN216390840U - Elevator door motor control circuit, device and system - Google Patents
Elevator door motor control circuit, device and system Download PDFInfo
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- CN216390840U CN216390840U CN202122721078.0U CN202122721078U CN216390840U CN 216390840 U CN216390840 U CN 216390840U CN 202122721078 U CN202122721078 U CN 202122721078U CN 216390840 U CN216390840 U CN 216390840U
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Abstract
The utility model discloses an elevator door motor control circuit, an elevator door motor control device and an elevator door motor control system, wherein the elevator door motor control circuit outputs a PWM (pulse width modulation) control signal to a driving module when a loop between an elevator door motor and a mains supply is disconnected through the control module; and when receiving the PWM control signal, the driving module controls the elevator door motor to slowly close the elevator car door in real time according to the PWM control signal. The utility model controls the elevator door motor in real time through the PWM control signal, so that the elevator door motor drives the elevator car door to be slowly closed within effective duty ratio time, thereby avoiding the safety accident that the elevator car door clamps people.
Description
Technical Field
The utility model relates to the technical field of electronic control, in particular to a control circuit, a device and a system of an elevator door motor.
Background
The elevator industry in China has been developed for decades, and the elevator becomes an indispensable bearing tool in the life of people. China is the global elevator manufacturing center and the largest elevator market, and the elevator yield, the maintenance quantity and the export quantity are promoted year by year. When the quantity of elevators increases, the safety accidents of the elevators are gradually increased due to the aging of part of the elevators and the like.
When the elevator has a sudden power failure in operation, the conventional door motor mechanical star seal is realized, and the two phases or three phases output by the elevator door motor are in short circuit to enable the elevator door motor to enter a star seal state by means of the normally closed contact of the relay, so that the elevator car door is closed. However, under the condition of sudden power failure, elevator passengers are easy to be confused, and meanwhile, the closing speed of the elevator car door is high and the safety accident that the elevator clamps people is easy to occur when the two-phase or three-phase stator of the elevator door motor is always in a short-circuit state.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims to provide an elevator door motor control circuit, an elevator door motor control device and an elevator door motor control system, and aims to solve the technical problem that in the prior art, when an elevator is powered off, a car door is quickly closed, and people are easily clamped.
In order to achieve the above object, the present invention provides an elevator door motor control circuit, including: the control module and the driving module;
the driving module is respectively connected with the control module and the elevator door motor;
the control module is used for outputting a PWM control signal to the driving module when a loop between the elevator door motor and a mains supply is disconnected;
and the driving module is used for controlling the elevator door motor to slowly close the elevator car door in real time according to the PWM control signal when receiving the PWM control signal.
Optionally, the elevator door motor control circuit further comprises: a power failure detection module;
the power failure detection module is respectively connected with the control module and a mains supply;
the power failure detection module is used for detecting the mains supply and outputting a power failure signal to the control module when the mains supply is powered down;
the control module is further configured to output a PWM control signal to the driving module when receiving the power-down signal.
Optionally, the driving module comprises: the drive chip and the on-off submodule are arranged on the drive chip;
the drive chip is respectively connected with the control module and the on-off submodule, and the on-off submodule is connected with the elevator door motor;
the driving chip is used for outputting a PWM driving signal to the on-off sub-module when receiving the PWM control signal;
and the on-off submodule is used for controlling the three-phase stator short circuit of the elevator door motor in real time according to the PWM driving signal so as to slowly close the elevator car door driven by the elevator door motor.
Optionally, the elevator door motor control circuit further comprises: a voltage conversion module;
the voltage conversion module is respectively connected with an emergency power supply, the control module and the driving chip;
the voltage conversion module is used for converting the emergency power supply voltage provided by the emergency power supply into a first driving voltage and outputting the first driving voltage to the control module;
the voltage conversion module is further configured to convert an emergency power supply voltage provided by the emergency power supply into a second driving voltage, and output the second driving voltage to the driving module.
Optionally, the elevator door motor control circuit further comprises: a standby power supply;
the standby power supply is connected with the voltage conversion module;
the standby power supply is used for providing standby power supply voltage for the voltage conversion module when the emergency power supply is powered off;
the voltage conversion module is further configured to convert a standby power supply voltage provided by the standby power supply into a first driving voltage, and output the first driving voltage to the control module;
the voltage conversion module is further configured to convert a standby power supply voltage provided by the standby power supply into a second driving voltage, and output the second driving voltage to the driving module.
Optionally, the control module is further configured to stop outputting the PWM control signal when a short-circuit current value of the three-phase stator in short circuit exceeds a rated current value, so that the three-phase stator of the elevator door motor stops short circuit.
Optionally, the on-off submodule includes: first to third IGBTs;
the grid of the first IGBT, the grid of the second IGBT and the grid of the third IGBT are connected with the output end of the driving chip, the collector of the first IGBT is connected with the first wiring end of the elevator door motor, the collector of the second IGBT is connected with the second wiring end of the elevator door motor, the collector of the third IGBT is connected with the third wiring end of the elevator door motor, and the emitter of the first IGBT, the emitter of the second IGBT and the emitter of the third IGBT are in short circuit.
Optionally, the on-off sub-module further includes: first to third resistors;
one end of the first resistor is connected with the emitting electrode of the first IGBT, one end of the second resistor is connected with the emitting electrode of the second IGBT, one end of the third resistor is connected with the emitting electrode of the third IGBT, and the other end of the first resistor, the other end of the second resistor and the other end of the third resistor are in short circuit.
In order to achieve the above object, the present invention further provides an elevator door motor control device, which includes the above elevator door motor control circuit.
In order to achieve the above object, the present invention further provides an elevator door machine control system, which includes the above elevator door machine control device.
The utility model provides an elevator door motor control circuit, an elevator door motor control device and an elevator door motor control system, wherein the elevator door motor control circuit outputs a PWM (pulse width modulation) control signal to a driving module through the control module when a loop between an elevator door motor and a mains supply is disconnected; and when receiving the PWM control signal, the driving module controls the elevator door motor to slowly close the elevator car door in real time according to the PWM control signal. The utility model controls the elevator door motor in real time through the PWM control signal, so that the elevator door motor drives the elevator car door to be slowly closed within effective duty ratio time, thereby avoiding the safety accident that the elevator car door clamps people.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic circuit structure diagram of a first embodiment of an elevator door motor control circuit according to the present invention;
fig. 2 is a schematic circuit structure diagram of a second embodiment of an elevator door motor control circuit according to the present invention;
fig. 3 is a schematic circuit diagram of a control module in a second embodiment of an elevator door motor control circuit according to the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) | |
| 10 | Control module | R1～R3 | First to |
|
| 20 | Drive module | G1～G3 | First to |
|
| 30 | Power |
40 | Voltage conversion module | |
| | Driving chip | 50 | |
|
| 201 | On-off submodule |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should be considered to be absent and not within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic circuit structure diagram of a first embodiment of an elevator door motor control circuit according to the present invention. A first embodiment of an elevator door motor control circuit of the present invention is presented based on fig. 1.
As shown in fig. 1, in the present embodiment, the elevator door motor control circuit includes: a control module 10 and a drive module 20;
wherein, the driving module 20 is respectively connected with the control module 10 and the elevator door motor.
It should be noted that in this embodiment the control module 10 can be used to control the operating state of the elevator door motor. The elevator door motor can be used for controlling the opening or closing of the elevator door and the hoistway door, such as controlling the elevator door and the hoistway door to be normally opened or closed when the elevator is in a normal running state, and controlling the elevator door and the hoistway door to be closed when the elevator is in an abnormal state. The drive module 20 can be used to drive an elevator door motor to cause the elevator door motor to close or open elevator car and hoistway doors. The driving module 20 can control the operating state of the elevator door motor by controlling the connection between the elevator door motor and the elevator door motor driving power supply. Of course, the driving module 20 can also control the short circuit between the three-phase stators of the elevator door motor to enable the elevator door motor to carry out a star-closing state.
It should be understood that the control module 10 may be comprised of a hardware structure including a switching tube. For example, when the loop between the elevator door motor and the commercial power supply is disconnected, a high-level or low-level control signal is given to the switching tube in the control module 10, so that the switching tube is controlled to be conducted, and the PWM control signal is output to the driving module 20 through the switching tube.
In specific implementation, when the loop between the elevator door motor and the mains supply is disconnected, the control module 10 outputs a PWM control signal to the driving module 20; when receiving the PWM control signal, the driving module 20 controls the elevator door motor to slowly close the elevator car door in real time according to the PWM control signal, and when the PWM control signal is in a high level state or a low level state, controls a three-phase stator of the elevator door motor to be short-circuited, so that the elevator car door is opened and slowly closed; when the PWM control signal is in the opposite low level state or high level state, the three-phase stator of the elevator door motor is not in short circuit, and the elevator car door stops closing and keeps the current state.
Wherein the PWM control signal can be used for controlling the closing of an elevator door motor. In this embodiment, a triangular wave or a sawtooth wave may be used to compare with the adjustable dc voltage through a comparator, so as to generate a PWM control signal with an adjustable duty ratio. The duty cycle of the PWM control signal may be defined on a case-by-case basis. For example, each cyclic pulse of the PWM control signal can be set to the same duty ratio, so that the three-phase stator of the elevator door motor is short-circuited for a fixed time in each cyclic pulse, and the elevator car door is slowly closed according to a certain frequency; the duty ratio of the PWM control signal can be gradually reduced, so that the closing speed of the elevator car door is gradually slowed down. The disconnection of the loop between the elevator door motor and the mains supply may be caused by the fact that the mains supply cannot provide the mains supply voltage during power failure, or may be caused by the fact that the connection between the elevator door motor and the mains supply has a fault. When the elevator door motor is disconnected from the mains supply, the elevator door motor cannot normally work, and the three-phase stator of the elevator door motor is in short circuit by closing the contacts of the star-sealing contactor, so that the elevator door motor stops working after the elevator door is safely closed.
The present embodiment provides an elevator door motor control circuit, which outputs a PWM control signal to a driving module through a control module when a loop between an elevator door motor and a mains supply is disconnected; and when receiving the PWM control signal, the driving module controls the elevator door motor to slowly close the elevator car door in real time according to the PWM control signal. This embodiment carries out real time control through PWM control signal to elevator door machine, makes elevator door machine drive elevator car door slowly and closes in effectual duty cycle time to avoid taking place elevator car door and press from both sides people's incident.
Referring to fig. 2, fig. 2 is a schematic circuit structure diagram of an elevator door motor control circuit according to a second embodiment of the present invention. A second embodiment of an elevator door motor control circuit of the present invention is presented based on the first embodiment of an elevator door motor control circuit described above.
In this embodiment, the elevator door motor control circuit further comprises: a power loss detection module 30;
the power failure detection module 30 is connected to the control module 10 and the commercial power supply, respectively.
It should be noted that, in this embodiment, the power failure detection module 30 may be configured to detect whether the mains power supply can provide the mains power supply voltage. The power-down detection module 30 outputs different voltage signals to the control module 10 in the normal state and the power-down state of the utility power supply. For example, the power-down detection module 30 may output a high-level signal to indicate that the commercial power supply is in a normal state, and output a low-level signal to indicate that the commercial power supply is in a power-down state, or may output a low-level signal to indicate that the commercial power supply is in a normal state, and output a high-level signal to indicate that the commercial power supply is in a power-down state.
In a specific implementation, the power-down detection module 30 may detect the mains supply, and output a power-down signal to the control module 10 when the mains supply is powered down; when receiving the power-down signal, the control module 10 outputs a PWM control signal to the driving module 30. For example, the power-down detection module 30 may preset a reference voltage, collect the mains voltage provided by the mains supply, input the mains voltage and the reference voltage into the first input terminal and the second input terminal of the comparator, and determine whether the mains supply is powered down according to the high-level signal or the low-level signal output by the comparator.
The power failure signal can be used for showing that the commercial power supply is in a power failure state. The power-down signal is generated and output by the power-down detection module 30 when detecting that the mains supply is in a power-down state.
In the present embodiment, the driving module 20 includes: a driving chip U1 and a switching sub-module 201;
the driving chip U1 is respectively connected with the control module 10 and the on-off submodule 201, and the on-off submodule 201 is connected with the elevator door motor.
It should be noted that in this embodiment, the make-break submodule 201 can be used to control the short-circuit make-and-break between the three-phase stators of the elevator door machine. The switching submodule 201 comprises a certain number of switching relays, and of course, the switching relays may be magnetic induction switches, triodes, MOS transistors, Insulated Gate Bipolar Transistors (IGBTs), and other devices capable of controlling the switching of the circuit according to signals, the driving chip U1 may be used to control the switching of the switching relays in the switching submodule 201, the driving chip U1 may generate PWM driving signals with the same duty ratio according to the PWM control signals when receiving the PWM control signals sent by the control module 10, and the signal amplitude of the PWM driving signals is generally greater than that of the PWM control signals.
In a specific implementation, when receiving the PWM control signal, the driving chip U1 may generate a PWM driving signal having the same duty ratio as the PWM control signal through a corresponding electronic component, and output the PWM driving signal to the on-off sub-module 201; the on-off sub-module 201 can control the short-circuit time of the three-phase stator of the elevator door motor in a cyclic pulse in real time according to the duty ratio of the cyclic pulse of the PWM driving signal when receiving the PWM driving signal, so as to slowly close the elevator car door driven by the elevator door motor.
In this embodiment, the elevator door motor control circuit further comprises: a voltage conversion module 40;
the voltage conversion module 40 is connected to an emergency power supply, the control module 10, and the driving chip U1, respectively.
It should be noted that the voltage conversion module 40 may be configured to convert the emergency power voltage provided by the emergency power supply into the driving voltage required by the control module 10 and the driving chip U1. The emergency power supply can provide emergency voltage for the elevator control system when the elevator door motor control system is abnormal. The control module 10 mainly plays a role in outputting a PWM control signal to control the elevator door motor, and the driving chip U1 needs to output a PWM driving signal for controlling the on/off of the switching relay in the on/off submodule 201, where the PWM driving signal has a certain requirement on voltage when controlling the on/off of the switching relay, for example, when the base voltage of the NPN type triode is higher than a certain value, the NPN type triode is turned on; the voltage magnitude required by the control chip U1 is often greater than the control module 10. The voltage conversion module 40 may convert the emergency power voltage by a step-up or step-down manner to obtain the driving voltage required by the control module 10 and the driving chip U1. The Power conversion module 40 may be a Switching Mode Power Supply (SMPS).
In a specific implementation, the voltage conversion module 40 may convert an emergency power voltage provided by the emergency power supply into a first driving voltage, and output the first driving voltage to the control module 10 to provide the required first driving voltage for the control module 10; the voltage conversion module 40 may further convert the emergency power voltage provided by the emergency power supply into a second driving voltage, and output the second driving voltage to the driving chip U1 to provide the driving voltage for the driving chip U1. For example, the emergency power supply may provide an emergency power supply voltage of 24V, the driver chip U1 needs a second driving voltage of 15V, and the control module 10 needs a first driving voltage of 5V, at this time, the voltage converting module 40 may respectively down-convert the emergency power supply voltage of 24V into the second driving voltage of 15V and the first driving voltage of 5V through two different conversion modes.
Wherein the first driving voltage can be used for driving the control module 10. The control module 10 may generate and output the PWM control signal upon receiving the power-down signal after the first driving voltage driving. The second driving voltage may be used to drive the driving chip U1. The driving chip U1 may normally complete the process of generating the PWM driving signal according to the PWM control signal when receiving the second driving voltage.
In this embodiment, the elevator door motor control circuit further comprises: a backup power supply 50;
wherein the standby power supply 50 is connected with the voltage conversion module 40.
It should be noted that, in the case where the mains power supply is in a power-down state and the emergency power supply is also in a power-down state, the backup power supply 50 may be used to provide a backup power supply voltage for the driving chip U1 and the control module 10. When the commercial power supply and the emergency power supply are in a power-down state at the same time, the elevator door motor is possibly uncontrollably caused by the failure of generating a control signal to cause a safety accident. And under the condition that the standby power supply 50 is arranged, the standby power supply 50 can provide standby power supply voltage to drive the control module 10 and the drive chip U1 after overvoltage conversion, so that safety accidents caused by uncontrolled elevator door operators are prevented.
In a specific implementation, the backup power supply 50 may provide a backup power supply voltage to the voltage conversion module 40 when the emergency power supply is powered down; the voltage conversion module 40 may convert the standby power voltage provided by the standby power into a first driving voltage, and output the first driving voltage to the control module 10; the voltage conversion module 40 may further convert the standby power voltage provided by the standby power into a second driving voltage, and output the second driving voltage to the driving chip U1. During the conversion, a step-up conversion as well as a step-down conversion may be involved. For example, the emergency power supply may provide a 12V backup power supply voltage, the driving chip U1 requires a 15V second driving voltage, and the control module 10 requires a 5V first driving voltage, at this time, the voltage conversion module 40 may boost the 12V backup power supply voltage into the 15V second driving voltage by a boost conversion manner to supply power to the driving chip U1, and the voltage conversion module 40 may also convert the 12V backup power supply voltage into the 5V first driving voltage by a buck conversion manner to supply power to the control module 10.
In this embodiment, when the three-phase stator of the elevator motor is short-circuited, the energy generated in the elevator motor can be consumed by the relay in the on-off submodule 201. When current passes through the relay, voltage drop is generated due to the internal resistance of the relay, and energy generated in the elevator motor can be consumed in a heat dissipation mode. In the heat dissipation process, the three-phase stator of elevator electronics is in the short circuit state, probably produces great electric current and causes the damage to components and parts. Therefore, the current value in the three-phase stator short-circuit needs to be detected in the energy consumption process, and the damage to components and parts caused by overlarge current is prevented.
In specific implementation, the control module 10 may further acquire a short-circuit current value in real time when the three-phase stator is in a short circuit, then perform current comparison between the short-circuit current value and a rated current value, when the short-circuit current value is greater than the rated current value, stop outputting the PWM control signal so as to stop the short circuit of the three-phase stator of the elevator door motor, and output the PWM control signal again after the short-circuit current value is reduced to drive the elevator door motor to continuously control the elevator door to be slowly closed.
Referring to fig. 3, in the present embodiment, the on-off submodule 201 includes: first to third IGBTs;
wherein, the grid of first IGBTG1, the grid of second IGBTG2 and the grid of third IGBTG3 are connected with the output of drive chip U1, the collector of first IGBTG1 is connected with the first terminal of elevator door machine, the collector of second IGBTG2 is connected with the second terminal of elevator door machine, the collector of third IGBTG3 is connected with the third terminal of elevator door machine, short circuit between the emitter of first IGBTG1, the emitter of second IGBTG2 and the emitter of third IGBTG 3.
It should be noted that the driving chip U1 may output a high level signal or a low level signal to the gate of the IGBT to control the IGBT to turn on or off. Here, the example is described in which the gate of the IGBT turns on when receiving a high-level signal, but the IGBT is not limited thereto. When the driving chip U1 outputs a PWM driving control signal, the first GBTG1, the second IGBTG2 and the third IGBTG3 are controlled to be in a conducting state at the same time at the high-level duty ratio of one cyclic pulse of the PWM driving control signal, the three-phase stators of the elevator door motor are directly in short circuit through the first GBTG1, the second IGBTG2 and the third IGBTG3, and the elevator door motor enters a star-sealed state to slowly close the elevator door; during the low time of one cycle pulse of the PWM control signal, the first GBTG1, the second IGBTG2, and the third IGBTG3 are simultaneously in the off state, and the elevator door machine does not enter the star state and the elevator cars remain in the current state. The steps are repeatedly executed in each cycle pulse time of the PWM driving signal, so that the closing time of the elevator car door can be effectively prolonged, and the elevator car door is closed more slowly to prevent people from being clamped.
Referring to fig. 3, in this embodiment, the on-off sub-module 201 further includes: first to third resistors;
one end of a first resistor R1 is connected with the emitter of the first IGBTG1, one end of a second resistor R2 is connected with the emitter of the second IGBTD2, one end of a third resistor R3 is connected with the emitter of the third IGBTG3, and the other end of the first resistor R1, the other end of the second resistor R2 and the other end of the third resistor R3 are in short circuit.
It should be noted that, in the current collection process, the voltage across the resistor in the circuit may be collected and obtained in a calculation manner. In this embodiment, a constant resistor may be connected to each of the emitter of the first IGBTG1, the emitter of the second IGBTD2, and the emitter of the third IGBTG3, and the short-circuit current value may be obtained by collecting the current flowing through the constant resistor. The first resistor R1, the second resistor R2, and the third resistor R3 may be constant resistors with the same resistance.
In this embodiment, the inverter circuit in the elevator control system includes a certain number of switching relays and a control chip of the elevator door motor. In a specific using process, related components in the elevator control system can be used, so that the situation that people are clamped by the elevator car door can be effectively avoided, and the cost of the elevator door control circuit is reduced.
In the present embodiment, an elevator door motor control circuit is provided, which outputs a PWM control signal to a driving module through a control module when a loop between an elevator door motor and a mains supply is disconnected; and when receiving the PWM control signal, the driving module controls the elevator door motor to slowly close the elevator car door in real time according to the PWM control signal. The embodiment obtains PWM driving signal through PWM control signal to utilize this PWM driving signal to carry out drive control elevator door machine to the elevator door machine and seal the star state in duty cycle time, make elevator door machine drive elevator car door slowly to close in effectual duty cycle time, thereby avoid taking place elevator car door and press from both sides people's incident.
In order to achieve the above object, the present invention further provides an elevator door motor control device, which includes the above elevator door motor control circuit. The specific structure of the elevator door motor control circuit refers to the above embodiments, and the elevator door motor control device adopts all technical schemes of all the above embodiments, so that the elevator door motor control device at least has all beneficial effects brought by the technical schemes of the above embodiments, and is not repeated here.
In order to achieve the above object, the present invention further provides an elevator door motor control system, which includes the above elevator door motor control device. The specific structure of the elevator door machine control device refers to the above embodiments, and since the elevator door machine control system adopts all technical solutions of all the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are achieved, and no further description is given here.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. An elevator door motor control circuit, comprising: the control module and the driving module;
the driving module is respectively connected with the control module and the elevator door motor;
the control module is used for outputting a PWM control signal to the driving module when a loop between the elevator door motor and a mains supply is disconnected;
and the driving module is used for controlling the elevator door motor to slowly close the elevator car door in real time according to the PWM control signal when receiving the PWM control signal.
2. The elevator door motor control circuit of claim 1, wherein the elevator door motor control circuit further comprises: a power failure detection module;
the power failure detection module is respectively connected with the control module and a mains supply;
the power failure detection module is used for detecting the mains supply and outputting a power failure signal to the control module when the mains supply is powered down;
the control module is further configured to output a PWM control signal to the driving module when receiving the power-down signal.
3. The elevator door motor control circuit of claim 2, wherein the drive module comprises: the drive chip and the on-off submodule are arranged on the drive chip;
the drive chip is respectively connected with the control module and the on-off submodule, and the on-off submodule is connected with the elevator door motor;
the driving chip is used for outputting a PWM driving signal to the on-off sub-module when receiving the PWM control signal;
and the on-off submodule is used for controlling the three-phase stator short circuit of the elevator door motor in real time according to the PWM driving signal so as to slowly close the elevator car door driven by the elevator door motor.
4. The elevator door motor control circuit of claim 3, wherein the elevator door motor control circuit further comprises: a voltage conversion module;
the voltage conversion module is respectively connected with an emergency power supply, the control module and the driving chip;
the voltage conversion module is used for converting the emergency power supply voltage provided by the emergency power supply into a first driving voltage and outputting the first driving voltage to the control module;
the voltage conversion module is further configured to convert an emergency power supply voltage provided by the emergency power supply into a second driving voltage, and output the second driving voltage to the driving module.
5. The elevator door motor control circuit of claim 4, wherein the elevator door motor control circuit further comprises: a standby power supply;
the standby power supply is connected with the voltage conversion module;
the standby power supply is used for providing standby power supply voltage for the voltage conversion module when the emergency power supply is powered off;
the voltage conversion module is further configured to convert a standby power supply voltage provided by the standby power supply into a first driving voltage, and output the first driving voltage to the control module;
the voltage conversion module is further configured to convert a standby power supply voltage provided by the standby power supply into a second driving voltage, and output the second driving voltage to the driving module.
6. The elevator door motor control circuit of claim 5, wherein the control module is further configured to stop outputting the PWM control signal to stop short-circuiting the three-phase stator of the elevator door motor when a short-circuit current value of the three-phase stator in short-circuiting exceeds a rated current value.
7. The elevator door motor control circuit of claim 6, wherein the on-off sub-module comprises: first to third IGBTs;
the grid of the first IGBT, the grid of the second IGBT and the grid of the third IGBT are connected with the output end of the driving chip, the collector of the first IGBT is connected with the first wiring end of the elevator door motor, the collector of the second IGBT is connected with the second wiring end of the elevator door motor, the collector of the third IGBT is connected with the third wiring end of the elevator door motor, and the emitter of the first IGBT, the emitter of the second IGBT and the emitter of the third IGBT are in short circuit.
8. The elevator door motor control circuit of claim 7, wherein the on-off sub-module comprises further comprising: first to third resistors;
one end of the first resistor is connected with the emitting electrode of the first IGBT, one end of the second resistor is connected with the emitting electrode of the second IGBT, one end of the third resistor is connected with the emitting electrode of the third IGBT, and the other end of the first resistor, the other end of the second resistor and the other end of the third resistor are in short circuit.
9. Elevator door machine control, characterized in that it comprises an elevator door machine control circuit according to any of claims 1-8.
10. An elevator door machine control system, characterized in that the elevator door machine control system comprises the elevator door machine control device of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122721078.0U CN216390840U (en) | 2021-11-08 | 2021-11-08 | Elevator door motor control circuit, device and system |
Applications Claiming Priority (1)
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