An elevator safety gear drive circuit, method, drive and system

Abstract

The application provides an elevator safety gear driving circuit, method, driver and system, which comprises a power supply circuit, a detection diagnosis circuit, a first sampling circuit, a second sampling circuit, a driving control circuit and an overcurrent detection circuit, the driving control circuit comprises a driving signal generation circuit, a high-side switch and a low-side switch; the first sampling circuit monitors a power supply voltage and a first working voltage; the second sampling circuit monitors a switch loop of an electromagnet of the elevator safety gear; the overcurrent detection circuit monitors a current of the electromagnet of the elevator safety gear; the detection diagnosis circuit outputs a PWM diagnosis signal at a fixed time, judges the condition of the elevator safety gear according to the monitoring results of the first sampling circuit, the second sampling circuit and the overcurrent detection circuit; and the driving signal generation circuit outputs a driving signal to make the high-side switch and the low-side switch control their own switch states based on the driving signal. The application can find the faults of the safety gear and the driver in time and improve the effective braking of the safety gear.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of elevator equipment, and in particular to an elevator safety gear driving circuit, method, driver and system. BACKGROUND

[0002] The safety gear is a safety protection device of the elevator, which can stop the elevator car and clamp it on the track in case of breakage and slack of the suspension rope when the running speed of the elevator exceeds the limit speed set by the elevator speed limiter. That is, the safety gear, as an emergency braking device of the elevator, can respond quickly when the elevator is abnormal or dangerous, lock the guide rail, and make the elevator instantaneously stop at a safe position. Therefore, the safety gear provides effective protection for the safe operation of the elevator.

[0003] The traditional elevator safety protection device is a speed limiter + safety gear, which is a semi-automatic device. The use of the speed limiter and the safety gear together can provide passive protection for the elevator, but the device occupies a large space. The electronic safety gear overcomes the shortcomings of the traditional elevator safety protection device and has been widely used. Usually, the electronic safety gear needs to be used with a driver. When the driver receives a signal triggering the action of the safety gear, the driver controls the action of the safety gear.

[0004] When the electronic components inside the driver fail, the safety gear cannot act, resulting in failure of the safety gear function. In case of abnormal operation of the elevator or danger, if the driver fails and the safety gear function fails, the elevator cannot be braked, which will have unpredictable consequences. Therefore, how to timely detect the failure of the safety gear and how to improve the effective braking of the electronic safety gear when the driver fails are important problems to be solved. SUMMARY

[0005] The present application provides an elevator safety gear driving circuit, method, driver and system to timely detect the failure of the electronic safety gear and the driver and improve the effective braking of the electronic safety gear. The specific technical solutions are as follows:

[0006] In a first aspect, the present application provides an elevator safety gear driving circuit, which comprises a power supply circuit, a detection and diagnosis circuit, a first sampling circuit, a second sampling circuit, a driving control circuit and an overcurrent detection circuit, wherein the driving control circuit comprises a driving signal generation circuit, a high-side switch and a low-side switch.

[0007] The power supply circuit is electrically connected with the first sampling circuit, and the detection and diagnosis circuit is electrically connected with the first sampling circuit, the second sampling circuit, the drive control circuit and the overcurrent detection circuit respectively; the overcurrent detection circuit is electrically connected with the drive signal generation circuit; the output end of the drive signal generation circuit is electrically connected with the control end of the high-side switch and the control end of the low-side switch respectively; the first end of the high-side switch is electrically connected with the positive pole of the first working voltage, and the second end of the high-side switch is electrically connected with the positive pole of the electromagnet of the elevator safety gear; the first end of the low-side switch is electrically connected with the negative pole of the first working voltage, and the second end of the low-side switch is electrically connected with the negative pole of the electromagnet of the elevator safety gear;

[0008] The power supply circuit is configured to access a power supply voltage, convert the power supply voltage, and output the first working voltage.

[0009] The first sampling circuit is configured to collect the power supply voltage and the first working voltage to obtain a power supply sampling signal.

[0010] The second sampling circuit is configured to collect a voltage between the positive pole and the negative pole of the electromagnet of the elevator safety gear to obtain a loop voltage signal.

[0011] The overcurrent detection circuit is configured to monitor the current of the electromagnet of the elevator safety gear and obtain a loop overcurrent signal when the current of the electromagnet of the elevator safety gear is greater than a preset current threshold.

[0012] The detection and diagnosis circuit is configured to output a PWM diagnosis signal to the drive control circuit at a timing, and is further configured to judge the condition of the elevator safety gear according to the power supply sampling signal, the loop voltage signal and the loop overcurrent signal, and output a fault signal when judging that the elevator safety gear is faulty.

[0013] The drive signal generation circuit is configured to receive and output a drive signal according to a trigger signal, the loop overcurrent signal and the PWM diagnosis signal, so that the high-side switch and the low-side switch control their own switching states based on the drive signal.

[0014] In a possible design, the power supply circuit includes a first voltage stabilizing circuit, a charging circuit, a super capacitor circuit, an equalization circuit, a first grid-connected circuit, a second voltage stabilizing circuit and a third voltage stabilizing circuit.

[0015] The input end of the first voltage stabilizing circuit is connected to the power supply voltage, the output end of the first voltage stabilizing circuit is respectively connected to the charging circuit and the first input end of the first grid-connected circuit, the output end of the charging circuit is connected to the first input end of the super capacitor circuit, the output end of the equalization circuit is connected to the second input end of the super capacitor circuit, the output end of the super capacitor circuit is connected to the second input end of the first grid-connected circuit, and the output end of the first grid-connected circuit is respectively connected to the first sampling circuit, the second voltage stabilizing circuit and the third voltage stabilizing circuit;

[0016] The first voltage stabilizing circuit is configured to convert the power supply voltage and output a first voltage.

[0017] The charging circuit is configured to charge the super capacitor circuit based on the first voltage.

[0018] The super capacitor circuit is configured to generate a first charging voltage.

[0019] The equalization circuit is configured to equalize the voltage of the super capacitor circuit.

[0020] The first grid-connected circuit is configured to combine the first voltage and the first charging voltage to obtain a first working voltage.

[0021] The second voltage stabilizing circuit is configured to convert the first working voltage to obtain a second voltage.

[0022] The third voltage stabilizing circuit is configured to convert the first working voltage to obtain a second working voltage.

[0023] In a possible design, the drive control circuit further includes an excitation switch, a delay circuit and a second grid-connected circuit.

[0024] The first input end of the drive signal generation circuit is used to access a trigger signal, the second input end of the drive signal generation circuit is used to access the PWM diagnostic signal, the third input end of the drive signal generation circuit is used to access the loop overcurrent signal, the fourth input end of the drive signal generation circuit is used to access the second working voltage, and the output end of the drive signal generation circuit is electrically connected with the first control end of the excitation switch; the first end of the excitation switch accesses the power supply voltage, the second end of the excitation switch is electrically connected with the first input end of the second grid-connected circuit, and the second control end of the excitation switch is electrically connected with the output end of the delay circuit; the second end of the high-side switch is electrically connected with the input end of the delay circuit and the second input end of the second grid-connected circuit respectively; the output end of the second grid-connected circuit is electrically connected with the positive electrode of the electromagnet of the elevator safety gear; and the input end of the overcurrent detection circuit is electrically connected with the low-side switch.

[0025] The delay circuit is used to output a delay signal.

[0026] The excitation switch is used to output the power supply voltage according to the drive signal, so that the electromagnet of the elevator safety gear is attracted; and the excitation switch is also used to, when receiving the delay signal, control itself to no longer output the power supply voltage, so that the electromagnet of the elevator safety gear continues to be attracted under the control of the first working voltage.

[0027] The second grid-connected circuit is used to perform merging processing on the first working voltage and the power supply voltage, to obtain a drive voltage, so as to drive the elevator safety gear.

[0028] In a possible design, the circuit further includes a protection circuit.

[0029] The input end of the protection circuit is used to access a power input voltage, and the output end of the protection circuit is electrically connected with the input end of the power supply circuit.

[0030] The protection circuit is used to perform anti-reverse connection and anti-surge protection on the power input voltage, and output the power supply voltage.

[0031] In a possible design, the super capacitor circuit includes a plurality of super capacitors connected in series.

[0032] In a second aspect, the present application provides an elevator safety gear driving method, which includes:

[0033] Monitoring a power supply voltage and a first working voltage to obtain a power supply sampling signal;

[0034] Monitoring a voltage between the positive electrode and the negative electrode of the electromagnet of the elevator safety gear to obtain a loop voltage signal;

[0035] Monitor the current of the electromagnet of the elevator safety gear, and obtain a loop overcurrent signal when the current of the electromagnet of the elevator safety gear is greater than a preset current threshold;

[0036] Timing output of the PWM diagnostic signal;

[0037] According to the power supply sampling signal, the loop voltage signal and the loop overcurrent signal, output a fault signal;

[0038] Receive and output a driving signal according to the trigger signal, the loop overcurrent signal and the PWM diagnostic signal, so that the high-side switch and the low-side switch control their own switching states based on the driving signal.

[0039] In a possible design, after the receiving and outputting of the driving signal according to the trigger signal, the loop overcurrent signal and the PWM diagnostic signal, so that the high-side switch and the low-side switch control their own switching states based on the driving signal, the method further includes:

[0040] Obtain a delay signal;

[0041] According to the driving signal, output a power supply voltage to make the electromagnet of the elevator safety gear attract;

[0042] When the delay signal is received, the power supply voltage is no longer outputted, so that the electromagnet of the elevator safety gear continues to attract under the control of the first working voltage.

[0043] In a third aspect, the present application provides a driver, including the elevator safety gear driving circuit as described in the first aspect.

[0044] In a fourth aspect, the present application provides an elevator safety gear driving system, including a trigger switch, an elevator safety gear, an elevator controller and the driver as described in the third aspect; the driver is electrically connected with the trigger switch, the elevator safety gear and the elevator controller respectively.

[0045] The trigger switch is configured to output a trigger signal;

[0046] The elevator controller is configured to receive a fault signal.

[0047] In a fifth aspect, the present application provides an electronic device, including a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory complete mutual communication through the communication bus;

[0048] The memory is configured to store a computer program;

[0049] The processor is configured to execute the program stored on the memory, and realize the elevator safety gear driving method steps of the second aspect.

[0050] In a sixth aspect, the present application provides a computer readable storage medium, wherein the computer readable storage medium stores a computer program, and the computer program is executed by a processor to implement the elevator safety gear driving method steps in the second aspect.

[0051] The beneficial effects of the embodiments of the present application are as follows:

[0052] In the embodiments of the present application, through the redundant design of the high-side switch and the low-side switch, when one of the switches has a short circuit fault, the other switch can still drive the elevator safety gear to act according to the driving signal, thereby improving the effective braking of the elevator safety gear. In addition, through the detection and diagnosis circuit, the PWM diagnosis signal is outputted in time, and the key voltage, the electromagnet of the elevator safety gear and the status of the switch loop thereof are monitored and diagnosed in real time based on the first sampling circuit, the second sampling circuit and the overcurrent detection circuit. When the electromagnet of the elevator safety gear and the switch loop thereof have a fault, the key voltage has an abnormality or the electromagnet has an overcurrent, a fault signal is outputted, and the fault signal is timely reported to the elevator controller, so that the fault can be found and processed in time.

[0053] The beneficial effects provided by the above-mentioned second aspect and each possible design of the above-mentioned second aspect can refer to the beneficial effects brought by the above-mentioned first aspect and each possible embodiment of the first aspect, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0054] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed in the embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other embodiments can also be obtained by those skilled in the art based on these drawings.

[0055] Figure 1 A structural schematic diagram of an elevator safety gear driving circuit provided by the embodiments of the present application is shown in the figure.

[0056] Figure 2 A working flowchart of an elevator safety gear driving system provided by the embodiments of the present application is shown in the figure.

[0057] Figure 3 An electronic device schematic diagram of the embodiments of the present application is shown in the figure. DETAILED DESCRIPTION

[0058] In the present application, "at least one" means one or more, and "multiple" means two or more. The term "and / or" describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the following three cases: A exists alone, A and B exist together, and B exists alone, where A and B can be singular or plural. The character " / " generally represents an "or" relationship between the associated objects before and after it. "At least one of the following" or similar expressions means any combination of these items, including any combination of single item or multiple items. For example, at least one of a, b or c alone can represent: a alone, b alone, c alone, combination of a and b, combination of a and c, combination of b and c, or combination of a, b and c, where a, b and c can be single or multiple. In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0059] The terms "center", "longitudinal", "transverse", "upper", "lower", "left", "right", "front", "back", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0060] The terms "connected" and "connected" should be broadly understood, for example, the "connected" or "connected" of the circuit structure can mean physical connection, but also means electrical connection or signal connection, for example, it can be directly connected, that is, physically connected, or indirectly connected through at least one intermediate element, as long as the circuit is connected, it can also be the internal connection of two elements; In addition to signal connection through the circuit, signal connection through media medium, such as radio waves, can also be referred to. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0061] In order to improve the effective braking of the electronic safety clamp when the drive fails, see Figure 1 , Figure 1 The drive circuit 1000 of the elevator safety clamp provided in the present application, as shown in Figure 1 , the circuit 1000 includes: power supply circuit 100, detection and diagnosis circuit 200, first sampling circuit 300, second sampling circuit 400, drive control circuit 500 and overcurrent detection circuit 600, wherein the drive control circuit 500 includes drive signal generation circuit 501, high-side switch 502 and low-side switch 503.

[0062] The power supply circuit 100 is electrically connected with the first sampling circuit 300, the detection diagnosis circuit 200 is electrically connected with the first sampling circuit 300, the second sampling circuit 400, the drive control circuit 500 and the overcurrent detection circuit 600 respectively, the overcurrent detection circuit 600 is electrically connected with the drive signal generation circuit 501, the output end of the drive signal generation circuit 501 is electrically connected with the control end of the high-side switch 502 and the control end of the low-side switch 503 respectively, the first end of the high-side switch 502 is electrically connected with the positive pole of the first working voltage 9VB, the second end of the high-side switch 502 is electrically connected with the positive pole of the electromagnet of the elevator safety gear, the first end of the low-side switch 503 is electrically connected with the negative pole of the first working voltage 9VB, and the second end of the low-side switch 503 is electrically connected with the negative pole of the electromagnet of the elevator safety gear.

[0063] The power supply circuit 100 is used for accessing a power supply voltage and converting the power supply voltage to output a first working voltage 9VB.

[0064] The first sampling circuit 300 is used for collecting the power supply voltage and the first working voltage 9VB to obtain a power supply sampling signal.

[0065] The second sampling circuit 400 is used for collecting the voltage between the positive pole and the negative pole of the electromagnet of the elevator safety gear to obtain a loop voltage signal.

[0066] The overcurrent detection circuit 600 is used for monitoring the current of the electromagnet of the elevator safety gear, and obtaining a loop overcurrent signal when the current of the electromagnet of the elevator safety gear is greater than a preset current threshold.

[0067] The detection diagnosis circuit 200 is used for outputting a PWM diagnosis signal to the drive control circuit 500 at a timing, and is also used for outputting a fault signal according to the power supply sampling signal, the loop voltage signal and the loop overcurrent signal.

[0068] The drive signal generation circuit 501 is used for receiving and outputting a drive signal according to a trigger signal, a loop overcurrent signal and a PWM diagnosis signal, so that the high-side switch 502 and the low-side switch 503 control their own switching states based on the drive signal.

[0069] The elevator safety gear driving circuit in the application can be a circuit module or a circuit in a driver of an electronic safety gear, and the application does not make specific limitation thereon. In addition, the elevator safety gear in the application is an electronic safety gear, which needs to be driven by a driver, the electronic safety gear includes an electromagnet, and whether the positive pole and the negative pole of the electromagnet are electrified is controlled to control the electromagnet to be in an attraction state or a release state, so as to control the state of the safety gear, and further to achieve the purpose of controlling the running or braking of the elevator.

[0070] In one application scenario of the application, referring to Figure 1The elevator safety gear driving circuit can be electrically connected with an external circuit or device, and the external circuit or device provides the power supply (including the positive electrode of the power supply and the ground), the safety ground, the trigger signal, the positive electrode and the negative electrode interface of the electromagnet of the elevator safety gear, and the fault port required by the elevator safety gear driving circuit.

[0071] Referring to Figure 1 In an example, the trigger signal can be provided by turning on or turning off the trigger switch, the control of the safety gear is realized by the driving control circuit, and the state of the elevator is controlled, for example, when the trigger switch is turned on, the electromagnet is attracted by the driving control circuit, the safety gear is released, and the elevator runs normally; when the trigger switch is turned off, the electromagnet is released by the driving control circuit, the safety gear is attracted, the elevator is braked, and the elevator car is clamped.

[0072] The power supply circuit converts the input power supply voltage to a first working voltage, and the first working voltage can be connected to the positive electrode and the negative electrode of the electromagnet to supply power to the electromagnet, so that the electromagnet is attracted, the safety gear is released, and the elevator runs normally. The power supply voltage can be 36VDC or 48VDC, and the first working voltage can be 9VDC.

[0073] The first sampling circuit monitors the power supply voltage and the first working voltage in real time, monitors the power supply by collecting the input voltage and the output voltage of the power supply circuit, obtains a power supply sampling signal, and sends the power supply sampling signal to the detection and diagnosis circuit, so that the detection and diagnosis circuit can monitor the key voltage (i.e. the input voltage and the output voltage of the power supply circuit) and handle it in time when the key voltage is too high or too low.

[0074] The second sampling circuit is electrically connected with the positive electrode and the negative electrode of the electromagnet of the elevator safety gear, collects the voltage between the positive electrode and the negative electrode of the electromagnet, obtains a loop voltage signal, and sends the loop voltage signal to the detection and diagnosis circuit, so that the detection and diagnosis circuit can monitor the switch loop of the electromagnet (i.e. the loop formed by the electromagnet, the high-side switch and the low-side switch) and handle it in time when the switch loop of the electromagnet fails.

[0075] The overcurrent detection circuit monitors the current of the electromagnet of the elevator safety gear. When the electromagnet has a large current or a short circuit, the current of the electromagnet will be greater than a preset current threshold, an overcurrent signal of the loop is output, and the overcurrent signal of the loop is sent to the detection and diagnosis circuit and the driving signal generation circuit, so that the detection and diagnosis circuit can monitor the electromagnet and handle it in time when the electromagnet has a short circuit; and the driving signal generation circuit controls the high-side switch and the low-side switch to turn off by outputting a driving signal when the electromagnet has a short circuit. The preset current threshold can be set by the user as needed.

[0076] The detection and diagnosis circuit outputs a PWM diagnosis signal to the drive control circuit in a timing manner, the electromagnet of the elevator safety gear is driven by the drive control circuit, and the voltage between the positive electrode and the negative electrode of the electromagnet of the elevator safety gear changes after the detection and diagnosis circuit outputs the PWM diagnosis signal in a timing manner. The second sampling circuit is used for real-time monitoring and diagnosis of the electromagnet of the elevator safety gear and the switching circuit thereof. The first sampling circuit is used for monitoring the key voltage (i.e. the input voltage and the output voltage of the power supply circuit), and the detection and diagnosis circuit judges whether the key voltage is abnormal. The overcurrent detection circuit is used for monitoring the current of the electromagnet of the elevator safety gear, and the detection and diagnosis circuit judges whether the electromagnet is overcurrent. When the electromagnet of the elevator safety gear and the switching circuit thereof are faulty, the key voltage is abnormal, or the electromagnet is overcurrent, a fault signal is output, and the fault signal is reported to the elevator controller through the fault port. It can be understood that the detection and diagnosis circuit outputs the PWM diagnosis signal in a timing manner, which does not affect the normal work of the electromagnet of the elevator safety gear.

[0077] The drive signal generation circuit outputs a drive signal according to the trigger signal, the loop overcurrent signal and the PWM diagnosis signal, so that the high-side switch and the low-side switch control their own switching states based on the drive signal. The high-side switch and the low-side switch receive the drive signal and control their own switching states according to the drive signal. For example, when the drive signal is high, the high-side switch and the low-side switch are in a conducting state, the electromagnet is attracted, the safety gear is released, and the elevator runs normally; when the drive signal is low, the high-side switch and the low-side switch are in an off state, the electromagnet is released, the safety gear is attracted, and the elevator is braked.

[0078] The high-side switch and the low-side switch designed in the application are redundantly designed, the positive electrode and the negative electrode of the first working voltage are electrically connected with the first end of the high-side switch and the first end of the low-side switch respectively, the positive electrode and the negative electrode of the electromagnet of the elevator safety gear are electrically connected with the second end of the high-side switch and the second end of the low-side switch respectively, and a current loop is formed by the high-side switch and the low-side switch. By designing two switches, when one of the switches is short-circuited and cannot drive the elevator safety gear to act, the other switch can still drive the elevator safety gear to act according to the drive signal, ensuring the braking effect of the elevator safety gear and providing double safety protection for the elevator.

[0079] In the embodiment of the present application, through the redundant design of the high-side switch and the low-side switch, when one of the switches has a short circuit fault, the other switch can still drive the elevator safety gear to act according to the driving signal, thereby improving the effective braking of the elevator safety gear. In addition, the PWM diagnosis signal is output by the detection and diagnosis circuit at a fixed time, and the condition of the key voltage, the electromagnet of the elevator safety gear and the switching loop thereof is monitored and diagnosed in real time based on the first sampling circuit, the second sampling circuit and the overcurrent detection circuit. When the electromagnet of the elevator safety gear and the switching loop thereof have a fault, the key voltage has an abnormality or the electromagnet has an overcurrent, a fault signal is output, and the fault signal is timely reported to the elevator controller, so that the fault can be timely found and processed.

[0080] In a possible embodiment, referring to Figure 1 , the power supply circuit 100 comprises a first voltage stabilizing circuit 101, a charging circuit 102, a super capacitor circuit 103, a balancing circuit 104, a first grid-connected circuit 105, a second voltage stabilizing circuit 106 and a third voltage stabilizing circuit 107.

[0081] The input end of the first voltage stabilizing circuit 101 is connected to a power supply voltage, and the output end of the first voltage stabilizing circuit 101 is electrically connected to the charging circuit 102 and the first input end of the first grid-connected circuit 105 respectively. The output end of the charging circuit 102 is electrically connected to the first input end of the super capacitor circuit 103, the output end of the balancing circuit 104 is electrically connected to the second input end of the super capacitor circuit 103, the output end of the super capacitor circuit 103 is electrically connected to the second input end of the first grid-connected circuit 105, and the output end of the first grid-connected circuit 105 is electrically connected to the first sampling circuit 300, the second voltage stabilizing circuit 106 and the third voltage stabilizing circuit 107 respectively.

[0082] The first voltage stabilizing circuit 101 is configured to convert the power supply voltage and output a first voltage 10V.

[0083] The charging circuit 102 is configured to charge the super capacitor circuit 103 based on the first voltage 10V.

[0084] The super capacitor circuit 103 is configured to generate a first charging voltage 9VA.

[0085] The balancing circuit 104 is configured to balance the voltage of the capacitor of the super capacitor circuit 103.

[0086] The first grid-connected circuit 105 is configured to combine and process the first voltage 10V and the first charging voltage 9VA to obtain a first working voltage 9VB.

[0087] The second voltage stabilizing circuit 106 is configured to convert the first working voltage 9VB to obtain a second voltage 3.3V.

[0088] The third voltage stabilizing circuit 107 is configured to convert the first working voltage 9VB to obtain a second working voltage 15V.

[0089] The first voltage stabilizing circuit is configured to convert the power supply voltage, and process the 36VDC or 48VDC power supply voltage to output a first voltage 10V. The first voltage 10V is used as an input voltage of the first grid-connected circuit and an input voltage of the charging circuit, so that the charging circuit charges the super capacitor circuit.

[0090] The super capacitor circuit generates a first charging voltage 9VA after being charged. In the case that the power supply input voltage of the external circuit is powered off, the power supply stored in the super capacitor circuit can continue to maintain the circuit working for a period of time, thereby avoiding the misoperation of the electromagnet of the elevator safety gear due to the short-time power-off of the external circuit.

[0091] In a possible embodiment, the super capacitor circuit includes a plurality of super capacitors connected in series.

[0092] The equalization circuit can prevent the problem that the partial super capacitors are overcharged due to the inconsistent capacitance of the plurality of super capacitors connected in series in the super capacitor circuit. That is, the equalization circuit can equalize the voltage of the capacitors in the super capacitor circuit.

[0093] The first grid-connected circuit is configured to combine and process the first voltage 10V and the first charging voltage 9VA, and obtain the first working voltage 9VB according to the principle of high-voltage priority output.

[0094] The second voltage stabilizing circuit is configured to convert the first working voltage 9VB to obtain a second voltage 3.3V, which is used to supply power to the devices in the elevator safety gear driving circuit.

[0095] The third voltage stabilizing circuit is configured to convert the first working voltage 9VB to obtain a second working voltage 15V, which is used to supply power to the devices in the elevator safety gear driving circuit.

[0096] In a possible embodiment, the driving control circuit further includes an excitation switch 504, a delay circuit 505, and a second grid-connected circuit 506.

[0097] The first input end of the drive signal generation circuit 501 is used for accessing the trigger signal, the second input end of the drive signal generation circuit 501 is used for accessing the PWM diagnosis signal, the third input end of the drive signal generation circuit 501 is used for accessing the loop overcurrent signal, the fourth input end of the drive signal generation circuit 501 is used for accessing the second working voltage 15V, and the output end of the drive signal generation circuit 501 is electrically connected with the first control end of the excitation switch 504; the first end of the excitation switch 504 accesses the power supply voltage, the second end of the excitation switch 504 is electrically connected with the first input end of the second grid connection circuit 506, and the second control end of the excitation switch 504 is electrically connected with the output end of the delay circuit 505; the second end of the high-side switch 502 is respectively electrically connected with the input end of the delay circuit 505 and the second input end of the second grid connection circuit 506; the output end of the second grid connection circuit 506 is electrically connected with the positive electrode of the electromagnet of the elevator safety gear; and the input end of the overcurrent detection circuit 600 is electrically connected with the low-side switch 503.

[0098] The delay circuit 505 is used for outputting a delay signal.

[0099] The excitation switch 504 is used for outputting the power supply voltage according to the drive signal, so that the electromagnet of the elevator safety gear is attracted; and is also used for controlling itself to no longer output the power supply voltage when the delay signal is received, so that the electromagnet of the elevator safety gear continues to be attracted under the control of the first working voltage.

[0100] The second grid connection circuit 506 is used for merging and processing the first working voltage and the power supply voltage to obtain a drive voltage, so as to drive the elevator safety gear.

[0101] The delay circuit starts timing after detecting the signal output by the high-side switch and driving the electromagnet of the elevator safety gear, outputs a delay signal after delaying for a preset time, and transmits the delay signal to the excitation switch, so that the excitation switch controls itself to no longer output the power supply voltage when the delay signal is received.

[0102] The second grid connection circuit merges and processes the first working voltage 9VB and the power supply voltage, obtains a drive voltage according to the principle of high-voltage priority output, and transmits the drive voltage to the positive electrode of the electromagnet of the elevator safety gear, so as to drive the elevator safety gear.

[0103] The first end of the excitation switch accesses the power supply voltage, the second end of the excitation switch is electrically connected with the first input end of the second grid connection circuit, and can provide high voltage for the electromagnet of the elevator safety gear, so that the electromagnet is effectively attracted. The second control end of the excitation switch is electrically connected with the output end of the delay circuit, and the state of the excitation switch can be controlled through the delay signal output by the delay circuit.

[0104] The excitation switch only functions in the initial stage of attracting the electromagnet of the safety gear and then releasing the brake of the elevator car, specifically, in the initial working stage of the first power-on operation after the elevator is installed or when the elevator car needs to be released after being braked by the safety gear, after the driving signal generation circuit outputs the driving signal, the excitation switch, the high-side switch and the low-side switch are all turned on, and based on the principle of high-voltage priority output of the second grid-connected circuit, since the supply voltage is higher than the first working voltage, at this time, the second grid-connected circuit outputs the supply voltage, so that the electromagnet of the elevator safety gear is attracted, that is, the elevator safety gear normally works under the driving of the supply voltage; in order to save electric energy during normal operation of the elevator, it is necessary to start timing after the elevator normally operates, and output a delay signal after the preset delay time, through the delay signal, the supply voltage output by the excitation switch is turned off, at this time, the second grid-connected circuit outputs the first working voltage, and the electromagnet of the elevator safety gear continues to be attracted under the action of the first working voltage, and the elevator can still normally operate.

[0105] In a possible embodiment, the circuit 1000 further comprises a protection circuit 700.

[0106] An input end of the protection circuit 700 is used for accessing the power input voltage, and an output end of the protection circuit 700 is electrically connected with the input end of the power supply circuit 100.

[0107] The protection circuit 700 is configured to perform anti-reverse connection and anti-surge protection on the power input voltage, and output a supply voltage.

[0108] The power input voltage is accessed from an external circuit, and needs to be protected against reverse connection and surge before being input to the power supply circuit, in an example, the protection against reverse connection and surge can be performed by a diode and a TVS (Transient Voltage Suppressor) tube.

[0109] The embodiment of the application further provides an elevator safety gear driving method, and the method is as follows.

[0110] S1, monitoring the supply voltage and the first working voltage to obtain a power supply sampling signal.

[0111] S2, monitoring the voltage between the positive electrode and the negative electrode of the electromagnet of the elevator safety gear to obtain a loop voltage signal.

[0112] S3, monitoring the current of the electromagnet of the elevator safety gear, and obtaining a loop overcurrent signal when the current of the electromagnet of the elevator safety gear is greater than a preset current threshold.

[0113] S4, timing output of a PWM diagnosis signal.

[0114] ​S5, based on the power sampling signal, the circuit voltage signal and the circuit overcurrent signal, output a fault signal.

[0115] S6 receives and outputs a drive signal based on the trigger signal, the loop overcurrent signal, and the PWM diagnostic signal, so that the high-side switch and the low-side switch control their own switching states based on the drive signal.

[0116] In one possible embodiment, after performing step S6 above, the method further includes:

[0117] S7, obtain the delayed signal.

[0118] S8, according to the drive signal, outputs a power supply voltage to make the electromagnet of the elevator safety clamp engage.

[0119] S9, upon receiving the delayed signal, the power supply voltage is no longer output so that the electromagnet of the elevator safety clamp continues to engage under the control of the first working voltage.

[0120] This application also provides a driver, including the elevator safety gear drive circuit as described above. This driver is used in conjunction with the elevator safety gear to drive the elevator safety gear.

[0121] This application also provides an elevator safety clamp drive system, see [link]. Figure 1 ,like Figure 1 As shown, the system includes: a trigger switch, an elevator safety gear, an elevator controller, and the aforementioned driver; the driver is electrically connected to the trigger switch, the elevator safety gear, and the elevator controller, respectively.

[0122] Trigger switch, used to output trigger signal.

[0123] The elevator controller is used to receive fault signals.

[0124] The elevator controller can control the operation of the elevator. After receiving a fault signal, it processes the fault signal and makes a decision on whether to control the elevator to continue running based on the fault signal.

[0125] See Figure 1 This application provides an elevator safety clamp drive system. In one example, the system can be a test device for the drive, wherein the trigger switch, elevator safety clamp, and elevator controller are all external circuits. At the same time, the external circuits also provide the drive with power (i.e., power input voltage and power ground) and safety ground.

[0126] The test device for the driver can provide a trigger signal by triggering the state of the switch, so that the driving signal generation circuit outputs the driving signal. For example, when the trigger switch is turned on, the electromagnet is attracted by the driving signal, the safety clamp is released, and the elevator runs normally; when the trigger switch is turned off, the electromagnet is released by the driving signal, the safety clamp is attracted, the elevator is braked, and the elevator car is clamped.

[0127] The detection and diagnosis circuit outputs a fault signal when determining the fault of the elevator safety clamp, and transmits the fault signal to the elevator controller to determine the operation, fault prompt, etc. of the elevator through the elevator controller.

[0128] Referring to Figure 2 , Figure 2 A working flow chart of an elevator safety clamp driving system provided by the embodiment is shown in Figure 2 , and the working flow is as follows:

[0129] First, the power input voltage of the external circuit is connected, and the voltage is used to charge the super capacitor circuit until the charging is completed, obtaining all the voltages required inside the elevator safety clamp driving circuit.

[0130] Second, detect whether the trigger switch is turned on. When the trigger switch is turned off, the electromagnet is released by the driving signal, the safety clamp is attracted, the elevator is braked, and the elevator car is clamped. When the trigger switch is turned on, the driving signal generation circuit outputs the driving signal to the excitation switch, the high-side switch and the low-side switch, the electromagnet of the elevator safety clamp is attracted after receiving the supply voltage output by the excitation switch, at this time, the safety clamp is released, the elevator runs normally, before the delay time arrives, the electromagnet of the elevator safety clamp is attracted under the action of the supply voltage output by the excitation switch, the elevator runs normally; after the delay time arrives, the delay circuit outputs a delay signal, the supply voltage output by the excitation switch is turned off through the delay signal, at this time, the second grid-connected circuit outputs the first working voltage 9VB, the electromagnet of the elevator safety clamp continues to be attracted under the action of the first working voltage 9VB, and the elevator can still run normally.

[0131] Before the timing time is up, whether the trigger switch is turned on is detected, when the trigger switch is turned off, the electromagnet is released by using the driving signal, the safety clamp is attracted, the elevator is braked, the elevator car is clamped, when the trigger switch is turned on, the electromagnet of the elevator safety clamp continues to be attracted under the action of the first working voltage 9VB, and the elevator can still operate normally. After the timing time is up, the PWM diagnosis signal is output to the driving control circuit by the detection diagnosis circuit, the voltage between the positive electrode and the negative electrode of the electromagnet is collected by the second sampling circuit, and whether the switch loop of the electromagnet (that is, the loop formed by the electromagnet, the high-side switch and the low-side switch) has a short circuit or an open circuit fault is judged by the detection diagnosis circuit; the key voltage (that is, the input voltage and the output voltage of the power supply circuit) is monitored by the first sampling circuit, and whether the key voltage is abnormal is judged by the detection diagnosis circuit; the current of the electromagnet of the elevator safety clamp is monitored by the overcurrent detection circuit, and whether the electromagnet has an overcurrent is judged by the detection diagnosis circuit, when any one of the above faults occurs, the detection diagnosis circuit outputs a fault signal, and reports the fault signal to the elevator controller, when the above faults do not occur, whether the trigger switch is turned on is continued to be detected. After the fault signal is reported to the elevator controller, whether the trigger switch is turned on is continued to be detected.

[0132] The embodiment of the application further provides an electronic device, referring to Figure 3 , comprising a processor 301, a communication interface 302, a memory 303 and a communication bus 304, wherein the processor 301, the communication interface 302 and the memory 303 complete mutual communication through the communication bus 304;

[0133] The memory 303 is used for storing a computer program;

[0134] The processor 301 is used for executing the program stored in the memory 303, and realizes the elevator safety clamp driving method steps in the application.

[0135] The communication bus mentioned in the above electronic device can be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus. The communication bus can be divided into an address bus, a data bus, a control bus and the like. For the convenience of representation, only one thick line is used in the figure, but it does not mean that there is only one bus or one type of bus.

[0136] The communication interface is used for communication between the above electronic device and other devices.

[0137] The memory can include a Random Access Memory (RAM) and can also include a Non-Volatile Memory (NVM), such as at least one disk memory. Optionally, the memory can also be at least one storage device located remotely from the aforementioned processor.

[0138] The processor described above can be a general processor, including a Central Processing Unit (CPU), a Network Processor (NP), etc.; can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component.

[0139] In yet another embodiment provided in the present application, a computer readable storage medium is also provided, and the computer readable storage medium has a computer program stored therein, and the computer program is executed by a processor to implement the steps of the elevator safety gear driving method described above.

[0140] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions can be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) manner. The computer readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. integrated with one or more available media. The available media can be magnetic media (for example, floppy disk, hard disk, magnetic tape), optical media (for example, DVD), or semiconductor media (for example, Solid State Disk (SSD)) and the like.

[0141] Finally, it should be noted that the above embodiments are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any changes or replacements within the technical scope disclosed in the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An elevator safety gear drive circuit, characterized by The circuit comprises a power supply circuit, a detection diagnosis circuit, a first sampling circuit, a second sampling circuit, a drive control circuit and an overcurrent detection circuit, wherein the drive control circuit comprises a drive signal generation circuit, a high-side switch and a low-side switch; The power supply circuit is electrically connected with the first sampling circuit, the detection diagnosis circuit is electrically connected with the first sampling circuit, the second sampling circuit, the drive control circuit and the overcurrent detection circuit respectively, the overcurrent detection circuit is electrically connected with the drive signal generation circuit, the output end of the drive signal generation circuit is electrically connected with the control end of the high-side switch and the control end of the low-side switch respectively, the first end of the high-side switch is electrically connected with the positive pole of the first working voltage, the second end of the high-side switch is electrically connected with the positive pole of the electromagnet of the elevator safety gear, the first end of the low-side switch is electrically connected with the negative pole of the first working voltage, and the second end of the low-side switch is electrically connected with the negative pole of the electromagnet of the elevator safety gear; The power supply circuit is used for connecting a power supply voltage and converting the power supply voltage to output the first working voltage; The first sampling circuit is used for collecting the power supply voltage and the first working voltage to obtain a power supply sampling signal; The second sampling circuit is used for collecting the voltage between the positive pole and the negative pole of the electromagnet of the elevator safety gear to obtain a loop voltage signal; The overcurrent detection circuit is used for monitoring the current of the electromagnet of the elevator safety gear and obtaining a loop overcurrent signal when the current of the electromagnet of the elevator safety gear is greater than a preset current threshold; The detection diagnosis circuit is used for outputting a PWM diagnosis signal to the drive control circuit at a timing and outputting a fault signal according to the power supply sampling signal, the loop voltage signal and the loop overcurrent signal; The drive signal generation circuit is used for receiving a trigger signal, the loop overcurrent signal and the PWM diagnosis signal and outputting a drive signal to make the high-side switch and the low-side switch control their switching states based on the drive signal.

2. The elevator safety-ram drive circuit of claim 1, wherein, The power supply circuit comprises a first voltage stabilizing circuit, a charging circuit, a super capacitor circuit, an equalization circuit, a first grid-connected circuit, a second voltage stabilizing circuit and a third voltage stabilizing circuit; The input end of the first voltage stabilizing circuit is connected with the power supply voltage, the output end of the first voltage stabilizing circuit is electrically connected with the charging circuit and the first input end of the first grid-connected circuit respectively, the output end of the charging circuit is electrically connected with the first input end of the super capacitor circuit, the output end of the equalization circuit is electrically connected with the second input end of the super capacitor circuit, the output end of the super capacitor circuit is electrically connected with the second input end of the first grid-connected circuit, and the output end of the first grid-connected circuit is electrically connected with the first sampling circuit, the second voltage stabilizing circuit and the third voltage stabilizing circuit respectively; The first voltage stabilizing circuit is used for converting the power supply voltage to output a first voltage; The charging circuit is used for charging the super capacitor circuit based on the first voltage; The super capacitor circuit is configured to generate a first charging voltage; The equalization circuit is configured to equalize the voltage of the capacitor of the super capacitor circuit; The first grid-connected circuit is configured to combine the first voltage and the first charging voltage to obtain a first working voltage; The second voltage stabilizing circuit is configured to convert the first working voltage to obtain a second voltage; The third voltage stabilizing circuit is configured to convert the first working voltage to obtain a second working voltage.

3. The elevator safety-ram drive circuit of claim 2, wherein, The drive control circuit further comprises an excitation switch, a delay circuit, and a second grid-connected circuit. The first input end of the drive signal generation circuit is configured to input a trigger signal, the second input end of the drive signal generation circuit is configured to input the PWM diagnostic signal, the third input end of the drive signal generation circuit is configured to input the loop overcurrent signal, the fourth input end of the drive signal generation circuit is configured to input the second working voltage, and the output end of the drive signal generation circuit is electrically connected with the first control end of the excitation switch; the first end of the excitation switch is configured to input the power supply voltage, the second end of the excitation switch is electrically connected with the first input end of the second grid-connected circuit, and the second control end of the excitation switch is electrically connected with the output end of the delay circuit; the second end of the high-side switch is electrically connected with the input end of the delay circuit and the second input end of the second grid-connected circuit respectively; the output end of the second grid-connected circuit is electrically connected with the positive electrode of the electromagnet of the elevator safety gear; and the input end of the overcurrent detection circuit is electrically connected with the low-side switch. The delay circuit is configured to output a delay signal. The excitation switch is configured to output the power supply voltage according to the drive signal to enable the electromagnet of the elevator safety gear to attract; and the excitation switch is further configured to, when the delay signal is received, control itself to no longer output the power supply voltage, so that the electromagnet of the elevator safety gear continues to attract under the control of the first working voltage. The second grid-connected circuit is configured to combine the first working voltage and the power supply voltage to obtain a drive voltage to drive the elevator safety gear.

4. The elevator safety-ram drive circuit of claim 1, wherein, The circuit further comprises a protection circuit. The input end of the protection circuit is configured to input a power supply input voltage, and the output end of the protection circuit is electrically connected with the input end of the power supply circuit. The protection circuit is configured to perform anti-reverse connection and anti-surge protection on the power supply input voltage to output the power supply voltage.

5. The elevator safety-ram drive circuit of claim 2, wherein, The super capacitor circuit comprises a plurality of super capacitors connected in series.

6. A method of driving an elevator safety gear, characterized by The method is applied to the elevator safety gear drive circuit of claim 3, and the method comprises: monitoring the power supply voltage and the first working voltage to obtain a power supply sampling signal; monitoring the voltage between the positive electrode and the negative electrode of the electromagnet of the elevator safety gear to obtain a loop voltage signal; monitoring the current of the electromagnet of the elevator safety gear, and obtaining a loop overcurrent signal when the current of the electromagnet of the elevator safety gear is greater than a preset current threshold; timely outputting a PWM diagnostic signal; outputting a fault signal according to the power supply sampling signal, the loop voltage signal, and the loop overcurrent signal; and The method further comprises:

7. The elevator safety gear drive method according to claim 6, characterized in that, acquiring a delay signal; outputting a supply voltage based on the driving signal to make the electromagnet of the elevator safety gear attract; stopping outputting the supply voltage when the delay signal is received to make the electromagnet of the elevator safety gear continue to attract under the control of the first working voltage. The elevator safety gear driving circuit comprises:

8. A driver characterized by comprising: The elevator safety gear driving circuit according to any one of claims 1-5. The elevator safety gear driving circuit comprises:

9. An elevator safety gear drive system characterized by, a trigger switch, an elevator safety gear, an elevator controller and the driver according to claim 8; the driver is electrically connected with the trigger switch, the elevator safety gear and the elevator controller respectively; the trigger switch is configured to output a trigger signal; the elevator controller is configured to receive a fault signal. The elevator safety gear driving circuit comprises a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory complete mutual communication through the communication bus; 10. An electronic device, comprising: the memory is configured to store a computer program; the processor is configured to execute the program stored in the memory to realize the elevator safety gear driving method steps according to any one of claims 6-7. The computer readable storage medium stores a computer program, and the computer program is executed by the processor to realize the elevator safety gear driving method steps according to any one of claims 6-7.

11. A computer readable storage medium, characterized in that, ​

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