Power supply device and elevator rescue system
By designing a power supply device with inverter and voltage regulation functions, multiple power adaptation of emergency devices in the elevator system is realized, solving the problem of increasing volume and cost of the elevator system and improving reliability.
Patent Information
- Application Number
- CN202310810408.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-07-04
- Publication Date
- 2025-01-07
AI Technical Summary
Emergency devices in existing elevator systems require different types of power systems, resulting in increased system volume, increased cost and reduced reliability.
Design a power supply device, including a power processing module, a rectifier module and a selection switch module. The power processing module has inverter and voltage regulation functions. The rectifier module is used to convert AC to DC power. The selection switch module is used to switch power output to realize the same power supply. The device is adapted to AC and DC loads.
It reduces the size and cost of the elevator system, improves the reliability of the system, and avoids the increase in additional power systems.
Smart Images
Figure CN119275984A_ABST
Abstract
Description
Technical Field
[0001] The disclosed embodiments of the present application relate to the technical field of transportation equipment, and more specifically, to a power supply device and an elevator rescue system. Background Art
[0002] When an elevator fails, such as a power outage, the safety of the passengers must be guaranteed. For this reason, emergency devices such as power outage emergency rescue devices, brake coils, safety clamps, etc. are usually installed in the elevator system.
[0003] Usually, since some emergency devices such as brake coils need to be powered by DC, while other emergency devices such as safety clamps need to be powered by AC, different power supply systems are required for brake coils and safety clamps; the additional power supply system not only increases the size and cost of the elevator system, but also reduces system reliability and increases rescue risks.
[0004] Therefore, how to reduce the size and cost of elevator systems and improve system reliability has become an urgent problem to be solved. Summary of the invention
[0005] According to an embodiment of the present application, the present invention proposes a power supply device and an elevator rescue system to reduce the volume and cost of an elevator system and improve system reliability.
[0006] According to one aspect of the present application, an exemplary power supply device is disclosed, including a power processing module, a rectifier module, and a selection switch module, wherein the input end of the power processing module is connected to direct current; the power processing module is configured to perform an inversion function or a voltage regulation function; when the power processing module is configured to perform an inversion function, the output end of the power processing module outputs alternating current; when the power processing module is configured to perform a voltage regulation function, the output end of the power processing module outputs direct current; the rectifier module receives the alternating current output by the power processing module; the input end of the selection switch module is connected to the output end of the power processing module, the first output end of the selection switch module is connected to the input end of the rectifier module, and the second output end of the selection switch module is used to be connected to a first emergency device; when the power processing module outputs alternating current, the input end of the selection switch module is connected to the first output end; when the power processing module outputs direct current, the input end of the selection switch module is connected to the second output end, and the output end of the rectifier module is used to be connected to the first emergency device.
[0007] In the above scheme, the power processing module is configured to be able to perform an inversion function and a voltage regulation function, and the power processing module adopts a DC input. When the power supply device is used to power the first emergency device, the power processing module performs a voltage regulation function and outputs DC power, and the selection switch module directly connects the output end of the power processing module to the first emergency device; the power processing module can also perform an inversion function to output AC power at its output end, so that it can adapt to a device that requires AC power supply, and the selection switch module connects the output end of the power processing module to the rectifier module, so that the rectifier module converts AC power into DC power to power the first emergency device. Therefore, the same power supply device can be used to adapt to AC loads and DC loads at the same time. AC loads and DC loads use the same power processing module. It is only necessary to set a rectifier module and a selection switch module in the power supply device. Compared with the solution of adding an additional power supply, it not only reduces the volume and cost of the elevator system, but also improves the reliability of the elevator system.
[0008] According to a second aspect of the present application, an elevator rescue system is provided, comprising a first emergency device and the above-mentioned power supply device; wherein, a power processing module of the power supply device is configured to perform a voltage regulation function, an output end of the power processing module outputs direct current, and an input end of a selection switch module of the power supply device is conductively connected to a second output end of the selection switch module.
[0009] In the above scheme, since the power processing module of the power supply device is configured to be able to perform an inversion function and a voltage regulation function, and the power processing module adopts a DC input, when the power supply device is used to power the first emergency device, the power processing module performs a voltage regulation function and outputs DC power, and the selection switch module directly connects the output end of the power processing module to the first emergency device; the power processing module can also perform an inversion function to output AC power at its output end, and thus can adapt to a device that requires AC power supply, and the selection switch module connects the output end of the power processing module to the rectifier module, so that the rectifier module converts AC power into DC power to power the first emergency device. Therefore, the same power supply device can be used to adapt to AC loads and DC loads at the same time, and the AC loads and DC loads use the same power processing module. It is only necessary to set a rectifier module and a selection switch module in the power supply device. Compared with the solution of adding an additional power supply, it not only reduces the volume and cost of the elevator system, but also improves the reliability of the elevator system. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] The present application will be further described below in conjunction with the accompanying drawings and implementation methods, in which:
[0011] Figure 1 It is a structural schematic diagram of an embodiment of a power supply device of the present application;
[0012] Figure 2 is a circuit diagram of an embodiment of the power supply device of the present application;
[0013] Figure 3 It is a structural schematic diagram of an embodiment of the elevator rescue system of the present application. DETAILED DESCRIPTION
[0014] In order to enable those skilled in the art to better understand the technical solution of the present application, the technical solution of the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.
[0015] According to the first aspect of the present application, a power supply device 100 is disclosed. Figure 1 , Figure 1 1 is a schematic diagram of the structure of an embodiment of a power supply device of the present application; specifically, the power supply device 100 includes a power processing module 110, a rectifier module 130, and a selection switch module 120, and the input end of the power processing module 110 is connected to direct current; the power processing module 110 is configured to perform an inversion function or a voltage regulation function; when the power processing module 110 is configured to perform an inversion function, the output end of the power processing module 110 outputs alternating current; when the power processing module 110 is configured to perform a voltage regulation function, the output end of the power processing module 110 outputs direct current; the rectifier module 130 receives the power processing module The input end of the selection switch module 120 is connected to the output end of the power processing module 110, the first output end 120a thereof is connected to the input end of the rectifier module 130, and the second output end 120b thereof is used to be connected to the first emergency device; when the power processing module 110 outputs AC power, the input end of the selection switch module 120 is connected to the first output end 120a; when the power processing module 110 outputs DC power, the input end of the selection switch module 120 is connected to the second output end 120b, and the output end of the rectifier module 130 is used to be connected to the first emergency device.
[0016] In the above scheme, the power processing module 110 is configured to be able to perform an inversion function and a voltage regulation function, and the power processing module 110 adopts a DC input. When the power supply device 100 is used to supply power to the first emergency device, the power processing module 110 performs a voltage regulation function and outputs DC power, and the selection switch module 120 directly connects the output end of the power processing module 110 to the first emergency device; the power processing module 110 can also perform an inversion function to output AC power at its output end, so that it can adapt to a device that requires AC power supply, and the selection switch module 120 connects the output end of the power processing module 110 to the rectifier module 130, so that the rectifier module 130 converts AC power into DC power to supply power to the first emergency device. Therefore, the same power supply device 100 can be used to adapt to AC loads and DC loads at the same time. The AC load and the DC load use the same power processing module 110. It is only necessary to set the rectifier module 130 and the selection switch module 120 in the power supply device 100. Compared with the solution of adding an additional power supply, it not only reduces the volume and cost of the elevator system, but also improves the reliability of the elevator system.
[0017] It should be noted that the first emergency device can be an emergency device adapted to a DC power supply, that is, it needs to work normally under the excitation of DC power. It can be an elevator brake coil, an elevator star-locking brake device, etc., and this application does not limit it.
[0018] In some embodiments, when the power module is configured to perform a voltage regulation function, it may be configured to perform a voltage step-down function or a voltage step-up function.
[0019] In some embodiments, please refer to Figure 2 , Figure 2 It is a circuit diagram of an embodiment of the power supply device of the present application; the power processing module 110 may include a first processing unit 111 and a second processing unit 112; the input end 111a of the first processing unit 111 is connected to direct current; the input end of the second processing unit 112 is connected to the output end of the first processing unit 111, and its output end is connected to the input end of the selection switch module 120; wherein, when the power processing module 110 is configured to perform an inversion function, the first processing unit 111 is configured to perform an inversion function, and the second processing unit 112 is configured to perform a filtering function; when the power processing module 110 is configured to perform a voltage regulation function, the first processing unit 111 and the second processing unit 112 are configured to jointly perform the voltage regulation function.
[0020] In some embodiments, please refer to Figure 2The first processing unit 111 can be a bridge converter, which includes a first relative bridge arm and a second relative bridge arm; controllable switches are provided on the first relative bridge arm and the second relative bridge arm, and the first relative bridge arm or the second relative bridge arm respectively forms a current loop with the second processing unit 112; when the power processing module 110 is configured to perform the voltage regulation function, the controllable switch on the first relative bridge arm is configured to be normally closed, the controllable switch on one of the bridge arms on the second relative bridge arm is configured to be normally open, and the controllable switch on the other bridge arm on the second relative bridge arm is configured to be selectively turned on or off, so that the first processing unit 111 and the second processing unit 112 cooperate with each other to perform the voltage regulation function.
[0021] In some embodiments, the second processing unit 112 includes a capacitor C1 and an inductor L1 ; the capacitor C1 is connected in parallel with the first processing unit 111 , and the inductor L1 is connected in series with the first processing unit 111 .
[0022] In this embodiment, continue to refer to Figure 2 The bridge converter may be a fully controlled bridge inverter, the first relative bridge arm may be the bridge arm where the controllable switches Q1 and Q4 are located, and the second relative bridge arm may be the bridge arm where the controllable switches Q2 and Q3 are located; the controllable switch may be a controllable semiconductor switch device such as a MOSFET or a triode, which is not limited in the present application; the second processing unit 112 may include an inductor L1 and a capacitor C1, wherein the inductor L1 is connected in series between the output end of the first processing unit 111 and the output end of the power processing unit, one end of the capacitor C1 is connected to the inductor L1, and the other end is connected to one end of the controllable switch Q3; when the first processing unit 111 is configured to perform an inversion function, the four controllable switches are turned on or off according to a certain strategy to convert the input AC power into DC power, The second processing unit 112 plays a filtering role. The working process of the fully controlled bridge inverter to achieve inversion is common knowledge in the field and will not be repeated in this application. When the power processing module 110 needs to output DC power, this embodiment uses the first processing module and the second processing module to cooperate to achieve the step-down function as an example for explanation: control the controllable switch Q1 to remain in the closed state, the controllable switch Q3 to remain on, the controllable switch Q4 to remain closed, and the controllable switch Q2 to switch between the on and off states at a certain frequency, for example, it can be opened and closed at a frequency of 50KHZ; in this case, a step-down circuit can be formed by the controllable switch tube Q2, the controllable switch tube Q3, the inductor L1, the capacitor C1 and the body diode of the controllable switch tube Q4 to achieve the step-down function.
[0023] In some embodiments, the maximum switching frequency supported by the controllable switches of the first processing unit 111 may be different. For example, the controllable switches Q2 and Q4 may be high-frequency controllable switches, such as those that can support a switching frequency of 50 kHz, while the controllable switches Q1 and Q3 may be low-frequency controllable switches, such as those that can support a switching frequency of 50 Hz, thereby reducing costs.
[0024] The above description uses the power processing module 110 to implement the step-down function as an example. It should be understood that when the power processing module 110 is used to implement the step-up function, those skilled in the art only need to make adaptive changes based on the circuit structure provided in the embodiment of the present application, for example, adjusting the connection relationship between the controllable switch and the inductor and capacitor or adding other components to enable it to implement the step-up function. These changes should be regarded as adaptive changes that do not exceed the inventive concept of the present application and do not exceed the protection scope of the present application.
[0025] In some embodiments, the selection switch module 120 may include a relay, which is used to receive a control signal so that when the output of the power processing module 110 switches between AC and DC, the output of the power processing module 110 is connected to the rectifier module 130 or directly connected to the first emergency device; of course, the selection switch module 120 can also be implemented using other components, such as controllable semiconductor switching devices, optocoupler switches, etc., which are not limited in this application.
[0026] In some embodiments, please refer to Figure 2 The rectifier module 130 may include a bridge rectifier circuit, which may be an uncontrolled bridge rectifier circuit composed of diodes, or a semi-controlled bridge rectifier circuit, a fully-controlled rectifier circuit, etc. composed of diodes and controllable switches. The present application does not limit the connection structure or type of the rectifier circuit.
[0027] In some embodiments, the rectifier module 130 can be connected to the first emergency device through the voltage regulating module 140; that is, the power supply device 100 can also include a voltage regulating module 140, the input end of the voltage regulating module 140 is connected to the output end of the rectifier module 130, and the voltage regulating module 140 is used to supply power to the first emergency device; please continue to refer to Figure 2 , the voltage regulating module 140 can be a step-down circuit to achieve the step-down function; of course, in other embodiments, the voltage regulating module 140 can be a step-up circuit, etc. to achieve the step-up function. Those skilled in the art can set circuits with different functions according to actual needs, and this application does not limit it; the step-down circuit and the step-up circuit can adopt various existing types of step-down circuits or step-up circuits, and this application does not limit it.
[0028] In some embodiments, the power processing module 110 is further configured to perform a self-test operation before outputting direct current or alternating current.
[0029] Since the power processing module 110 can output AC or DC, some of the loads at its rear end can only work normally in an AC or DC environment, otherwise the load components will be damaged; the selection switch module 120 can control the AC or DC output of the power processing module 110 to be correctly output to the corresponding load; for this reason, it is necessary to perform a self-test before the power processing module 110 switches the AC or DC output, that is, check the status of the selection switch module 120 to determine that the selection switch module 120 is correctly connected.
[0030] In some embodiments, the selection switch module 120 can actively feedback current state information. For example, when its input end is connected to the first output end 120a, it can feedback a low level, and when its input end is connected to the second output end 120b, it can feedback a high level. The level state actively fed back by the selection switch module 120 can determine whether the selection switch module 120 is correctly connected.
[0031] In some embodiments, a test signal can be generated at both ends of the selection switch module 120. The test signal can generate a certain voltage at both ends of the selection switch module 120, which can be 5V, 10V, etc., and will not cause damage to the circuit; for example, when the selection switch module 120 needs to connect its input end to the second output end 120b, a test signal is generated at both ends of the selection switch module 120 to determine whether the second output end 120b of the selection module receives the corresponding current to determine that the selection switch module 120 is correctly connected.
[0032] In some embodiments, the self-test operation may include: outputting a test signal at the output end of the power processing module 110; obtaining a self-test result based on the test signal, and the self-test result is used to determine whether the selection switch module 120 operates in an abnormal state or a normal state; wherein the abnormal state includes that the input end of the selection switch module 120 is connected to the first output end 120a and the power processing module 110 outputs direct current, or that the input end of the selection switch module 120 is connected to the second output end 120b and the power processing module 110 outputs alternating current; the normal state includes that the input end of the selection switch module 120 is connected to the first output end 120a and the power processing module 110 outputs alternating current, or that the input end of the selection switch module 120 is connected to the second output end 120b and the power processing module 110 outputs direct current.
[0033] In some embodiments, a sampling device may be provided on a circuit corresponding to the first output terminal 120a and the second output terminal 120b of the selection switch module 120; for example, a sampling resistor may be provided between the first output terminal 120a and the first emergency device, and between the first output terminal 120a and the input terminal of the rectifier device. Before the power processing module 110 outputs direct current or alternating current, a test signal may be generated at the output terminal of the power processing module 110. The voltage of the test signal is relatively small, for example, it may be 10V, 30V, etc., and the circuit will not be damaged even if the selection switch module 120 operates in an abnormal state. After the power processing module 110 outputs the test signal, whether the selection switch module 120 is correctly connected may be determined based on whether the sampling resistor on the corresponding circuit detects the corresponding voltage or current.
[0034] In some embodiments, please refer to Figure 2 The power processing module 110 also includes a sampling unit for collecting voltage or current parameters in a loop composed of the power processing module 110, the switch selection module and the rectifier module 130; obtaining a self-test result based on the test signal includes: obtaining the voltage or current parameter collected by the sampling unit; in response to the voltage or current parameter exceeding a preset range, determining that the selection switch module 120 is operating in an abnormal state, or, in response to the voltage or current parameter not exceeding the preset range, determining that the selection switch module 120 is operating in a normal state.
[0035] In the present embodiment, the sampling unit may be a resistor R1, which may be connected in series to the input end of the power processing module 110. When the power processing module 110 generates a test signal at its output end, a loop consisting of the power processing module 110, the selection switch module 120, the first emergency device, etc. is stimulated by the test signal to generate a corresponding current. Since the connection mode of the selection switch module 120 is different, the magnitude of the generated current is also different. Based on this, it can be determined whether the selection switch module 120 is correctly connected. For example, when the power processing module 110 needs to output AC power, a test signal is output first. If the current collected on the resistor R1 is greater than 200 mA, it means that the selection switch module 120 is working in an abnormal state and the power processing module 110 no longer outputs AC power. If the current collected on the resistor R1 is less than 100 mA, it means that the selection switch module 120 is working in a normal state and the power processing module 110 outputs AC power.
[0036] In other embodiments, the resistor R1 can be connected at different positions, which is not limited in the present application; the sampling unit can also be other components, for example, a current detection device or a voltage detection device such as a potentiometer is directly connected at both ends of the first emergency device, and the potentiometer feeds back the potential at both ends of the first emergency device to determine whether the selection switch module 120 is working normally.
[0037] According to a second aspect of the present application, an elevator rescue system is provided, comprising a first emergency device and the above-mentioned power supply device 100; wherein, the power processing module 110 of the power supply device 100 is configured to perform a voltage regulation function, the output end of the power processing module 110 outputs direct current, and the input end of the selection switch module 120 of the power supply device 100 is conductive to the second output end 120b of the selection switch module 120.
[0038] The first emergency device can work normally in a DC environment, for example, it can be an elevator brake coil, an elevator star-locking brake device, etc. At this time, the power supply device 100 of the elevator rescue system only needs to generate DC power to power the first emergency device.
[0039] In some embodiments, please refer to Figure 3 , Figure 3 It is a structural diagram of an embodiment of the elevator rescue system of the present application; the elevator rescue system may also include a second emergency device connected to the output end of the power processing module 110; wherein the power processing module 110 is configured to perform an inverter function, the output end of the power processing module 110 outputs alternating current to power the second emergency device, and the input end of the switch module 120 is selected to be conductive with its first output end 120a.
[0040] The second emergency device works normally in an AC environment; when the elevator rescue system includes a first emergency device and a second emergency device, the power supply device 100 needs to supply AC power to the second emergency device and DC power to the first emergency device; at this time, the power processing module 110 of the power supply device 100 is configured to perform an inverter function to generate AC power at its output end to output the AC power to the first emergency device; the output end of the power processing module 110 is connected to the rectifier module 130 of the power supply device 100 through the selection switch module 120 to convert the AC power into DC power and then supply power to the first emergency device.
[0041] In the above scheme, since the power processing module 110 of the power supply device 100 is configured to be able to perform an inversion function and a voltage regulation function, and the power processing module 110 adopts a DC input, when the power supply device 100 is used to power the first emergency device, the power processing module 110 performs a voltage regulation function and outputs DC power, and the selection switch module 120 directly connects the output end of the power processing module 110 to the first emergency device; the power processing module 110 can also perform an inversion function to output AC power at its output end, and thus can adapt to a device requiring AC power supply, and the selection switch module 120 connects the output end of the power processing module 110 to the rectifier module 130, so that the rectifier module 130 converts AC power into DC power to power the first emergency device. Therefore, the same power supply device 100 can be used to adapt to AC loads and DC loads at the same time. The AC loads and DC loads use the same power processing module 110, and only the rectifier module 130 and the selection switch module 120 need to be set in the power supply device 100. Compared with the scheme of adding an additional power supply, it not only reduces the volume and cost of the elevator system, but also improves the reliability of the elevator system.
[0042] It is easy for a person skilled in the art to know that many modifications and changes can be made to the device and method while maintaining the teaching content of the present application. Therefore, the above disclosure should be considered as limited only by the scope of the appended claims.
Claims
1. A power supply device, applied to an elevator rescue system, characterized in that: include: A power processing module, whose input end is connected to direct current; the power processing module is configured to perform an inversion function or a voltage regulation function; when the power processing module is configured to perform an inversion function, the output end of the power processing module outputs alternating current; when the power processing module is configured to perform a voltage regulation function, the output end of the power processing module outputs direct current; A rectifier module, receiving the alternating current output by the power processing module; A selection switch module, whose input end is connected to the output end of the power processing module, whose first output end is connected to the input end of the rectifier module, and whose second output end is used to connect to the first emergency device; when the power processing module outputs alternating current, the input end of the selection switch module is connected to the first output end; when the power processing module outputs direct current, the input end of the selection switch module is connected to the second output end, and the output end of the rectifier module is used to connect to the first emergency device.
2. The power supply device according to claim 1, characterized in that: The power processing module comprises: A first processing unit, an input terminal of which is connected to direct current; A second processing unit, whose input end is connected to the output end of the first processing unit, and whose output end is connected to the input end of the selection switch module; Among them, when the power processing module is configured to perform an inversion function, the first processing unit is configured to perform an inversion function, and the second processing unit is configured to perform a filtering function; when the power processing module is configured to perform a voltage regulation function, the first processing unit and the second processing unit are configured to jointly perform the voltage regulation function.
3. The power supply device according to claim 2, characterized in that: The first processing unit is a bridge converter, and the bridge converter includes a first relative bridge arm and a second relative bridge arm; controllable switches are provided on the first relative bridge arm and the second relative bridge arm, and the first relative bridge arm or the second relative bridge arm respectively forms a current loop with the second processing unit; When the power processing module is configured to perform a voltage regulation function, the controllable switch on the first relative bridge arm is configured to be normally closed, the controllable switch on one of the second relative bridge arms is configured to be normally open, and the controllable switch on the other of the second relative bridge arms is configured to be selectively turned on or off, so that the first processing unit cooperates with the second processing unit to jointly perform the voltage regulation function.
4. The power supply device according to claim 2, characterized in that: The second processing unit includes a capacitor and an inductor; the capacitor is connected in parallel with the first processing unit, and the inductor is connected in series with the first processing unit.
5. The power supply device according to claim 1, characterized in that: The power processing module is further configured to perform a self-check operation before outputting the direct current or the alternating current.
6. The power supply device according to claim 5, characterized in that: The self-checking operation includes: Outputting a test signal at an output end of the power processing module; A self-test result is obtained based on the test signal; the self-test result is used to determine whether the selection switch module is operating in an abnormal state or a normal state; Among them, the abnormal state includes that the input end of the selection switch module is conductively connected to the first output end and the power processing module outputs direct current, or that the input end of the selection switch module is conductively connected to the second output end and the power processing module outputs alternating current; the normal state includes that the input end of the selection switch module is conductively connected to the first output end and the power processing module outputs alternating current, or that the input end of the selection switch module is conductively connected to the second output end and the power processing module outputs direct current.
7. The power supply device according to claim 6, characterized in that: The power processing module also includes: A sampling unit, used to collect voltage or current parameters in a loop formed by the power processing module, the switch selection module and the rectifier module; The obtaining of the self-test result based on the test signal comprises: Acquiring the voltage or current parameter collected by the sampling unit; In response to the voltage or current parameter exceeding a preset range, it is determined that the selection switch module is operating in an abnormal state, or, In response to the voltage or current parameter not exceeding the preset range, it is determined that the selection switch module is operating in the normal state.
8. The power supply device according to claim 1, characterized in that: Also includes: A voltage regulating module, whose input end is connected to the output end of the rectifier module, and the voltage regulating module is used to supply power to the first emergency device.
9. An elevator rescue system, comprising a first emergency device, characterized in that: Also includes the power supply device according to any one of claims 1 to 8; The power processing module of the power supply device is configured to perform a voltage regulation function, the output end of the power processing module outputs direct current, and the input end of the selection switch module of the power supply device is conductively connected to the second output end of the selection switch module.
10. The elevator rescue system according to claim 9, characterized in that: Also includes: A second emergency device connected to the output end of the power processing module; The power processing module is configured to perform an inversion function, the output end of the power processing module outputs alternating current to power the second emergency device, and the input end of the selection switch module and the first output end thereof are conductively connected.