Elevator controller and elevator

Abstract

The utility model discloses an elevator controller, an elevator and electronic equipment, and belongs to the technical field of power supplies. Wherein the power conversion loop comprises a clamping circuit and an amplifying circuit, the input end of the clamping circuit is connected with the elevator safety loop, the output end of the clamping circuit is connected with the amplifying circuit, and the output end of the amplifying circuit is connected with the safety control circuit. The clamping circuit and the amplifying circuit are used for converting a first electric signal of an elevator safety circuit into a second electric signal required by the safety control circuit; therefore, wide-range voltage input is achieved, ripples are reduced, the possibility of upper and lower tube driving oscillation, EMI increase and even straight-through tube explosion is reduced, and the safety and reliability of the elevator controller are improved.

Description

Technical Field

[0001] This application belongs to the field of power supply technology, and in particular relates to an elevator controller and an elevator. Background Technology

[0002] Elevators are classified as special safety equipment. The contactor control cabinet (used for operation, braking, and sealing contactors) is powered by the end of the high-voltage safety circuit. The contactor coil is controlled by the main board relay, and the contactor contacts control the elevator's operation and braking. Frequent contactor operation generates noise, affecting the passenger's elevator experience (especially in machine-room-less and home elevators). At the same time, arcing of the contactor contacts and main board relays can easily cause the contactors and main board-controlled relays to fail. To solve the above problems, a low-voltage power supply is needed to power the elevator stop and safety brake. The end of the safety circuit door lock needs to be used as a high-voltage input source, and a high-voltage to low-voltage power supply device is used to control the elevator stop and safety brake.

[0003] However, due to the large differences in floor levels, the significant differences in door lock voltage drop between single doors and through doors, and the inherent limited range of the power grid input, the high-voltage power supply input of the safety circuit is very broad, making it difficult to reliably output elevator controllers under both minimum and maximum input voltages. Furthermore, the elevator controller for the safety brake needs to supply power to the digital isolator driven by the control isolation power supply, which places certain requirements on the power supply ripple. Small loads can easily lead to large output ripple in the elevator controller, which in turn leads to large drive ripple of the digital isolation power supply, oscillation of the upper and lower transistors, a significant increase in electromagnetic interference (EMI), and even transistor blowout.

[0004] Therefore, the related elevator controller has defects such as narrow input voltage range and large ripple, which leads to oscillation of the ground and upper tube drives, increased EMI, and even tube blowout. Utility Model Content

[0005] The purpose of this application is to provide an elevator controller and an elevator, which aims to solve the problems of narrow input voltage range and large ripple of elevator controllers, which lead to oscillation of the ground and upper tube drives, increased EMI, and even tube blowout.

[0006] This application provides an elevator controller, including: a power conversion circuit and a safety control circuit;

[0007] The power conversion circuit includes a clamping circuit and an amplification circuit. The input terminal of the clamping circuit is connected to the elevator safety circuit, the output terminal of the clamping circuit is connected to the amplification circuit, and the output terminal of the amplification circuit is connected to the safety control circuit. The clamping circuit and the amplification circuit are used to convert the first electrical signal of the elevator safety circuit into the second electrical signal required by the safety control circuit.

[0008] In one embodiment, the amplification circuit includes a first amplification circuit and a second amplification circuit;

[0009] The first amplifier circuit is connected to the elevator safety circuit and is used to adjust the first electrical signal of the elevator safety circuit to output a third electrical signal.

[0010] The second amplifier circuit is connected to the first amplifier circuit and is used to regulate the voltage of the third electrical signal to output the second electrical signal.

[0011] In one embodiment, both the first amplifier circuit and the second amplifier circuit include a common-base amplifier module;

[0012] The common-base amplifier module includes a first switching device, a first thyristor, a first resistor, a second resistor, and a third resistor;

[0013] The collector of the first switching device is connected to the first end of the first resistor and together they form the input terminal of the common-base amplifier module;

[0014] The base of the first switching device is connected to the second terminal of the first resistor and the negative terminal of the first thyristor, respectively.

[0015] The emitter of the first switching device is connected to the first end of the second resistor and together they form the output terminal of the common-base amplifier module;

[0016] The second end of the second resistor is connected to the first end of the third resistor and the control terminal of the first thyristor, respectively. The positive terminal of the first thyristor and the second end of the third resistor are connected to the power supply ground.

[0017] In one embodiment, the common-base amplifier module further includes a first capacitor, a second capacitor, a third capacitor, and a fourth resistor;

[0018] The first terminal of the first capacitor is connected to the collector of the first switching device and the first terminal of the first resistor, respectively.

[0019] The first terminal of the second capacitor is connected to the first terminal of the fourth resistor, the base of the first switching device is connected to the second terminal of the first resistor, and the negative terminal of the first thyristor is connected to the first terminal of the fourth resistor, respectively.

[0020] The second terminal of the second capacitor is connected to the first terminal of the third capacitor, the second terminal of the second resistor is connected to the first terminal of the third resistor, and the control terminal of the first thyristor is connected to the third resistor, respectively.

[0021] The second terminal of the fourth resistor is connected to the second terminal of the third capacitor;

[0022] The second terminal of the first capacitor is connected to the power supply ground.

[0023] In one embodiment, the clamping circuit includes a first Zener diode, a first terminal of which is connected to the first terminal of the first resistor and the collector of the first switching device, and a second terminal of which is connected to the power supply ground.

[0024] In one embodiment, the power conversion circuit further includes a first filter circuit and a current regulation circuit;

[0025] After the first filter circuit is connected to the current regulation circuit, it is connected to the clamping circuit.

[0026] The first filtering circuit and the current regulation circuit are used to filter and regulate the current of the first electrical signal.

[0027] In one embodiment, the power conversion circuit further includes a second filter circuit and a third filter circuit. The second filter circuit is connected to the first amplifier circuit, and the third filter circuit is connected to the second amplifier circuit. The second filter circuit is used to filter the third electrical signal, and the third filter circuit is used to filter the second electrical signal.

[0028] In one embodiment, the safety control circuit includes a safety brake circuit and a safety torque shutdown circuit, and the power conversion circuit includes a first power conversion circuit and a second power conversion circuit. The first power conversion circuit is used to convert the first electrical signal of the elevator safety circuit into a second electrical signal required by the safety brake circuit, and the second power conversion circuit is used to convert the first electrical signal of the elevator safety circuit into a second electrical signal required by the safety torque shutdown circuit.

[0029] In one embodiment, the elevator safety circuit includes a switch circuit and a transformer. The input terminal of the switch circuit is connected to a high-voltage electrical signal, the output terminal of the switch circuit is connected to the input terminal of the transformer, and the output terminal of the transformer is connected to the power conversion circuit.

[0030] This utility model embodiment also provides an elevator, which includes the elevator controller described above.

[0031] The beneficial effects of this utility model embodiment compared with the prior art are as follows: because the clamping circuit has a clamping function, a wide range of voltage input is achieved; at the same time, the clamping circuit and the amplifier circuit play a voltage stabilizing role, thus reducing the ripple of the elevator controller. By reducing drive oscillation and reducing electromagnetic interference (EMI), the risk of direct-through tube failure is effectively reduced, thereby significantly improving the safety and reliability of the elevator control system. Attached Figure Description

[0032] To more clearly illustrate the technical utility model in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the structure of an elevator controller provided in one embodiment of this application;

[0034] Figure 2 A schematic diagram of an amplifier circuit in an elevator controller provided in an embodiment of this application;

[0035] Figure 3 This is a schematic diagram of a power conversion circuit in an elevator controller provided in an embodiment of this application;

[0036] Figure 4 This is a schematic diagram of a power conversion circuit in an elevator controller provided in an embodiment of this application;

[0037] Figure 5 Another structural schematic diagram of an elevator controller provided in one embodiment of this application;

[0038] Figure 6 This is a partial example circuit diagram of an elevator controller provided in one embodiment of this application. Detailed Implementation

[0039] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0040] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0041] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0043] Figure 1 A schematic diagram of the elevator controller provided in a preferred embodiment of this application is shown. For ease of explanation, only the parts relevant to this embodiment are shown, and are described in detail below:

[0044] The elevator controller described above includes a power conversion circuit 10 and a safety control circuit 20. The power conversion circuit 10 includes a clamping circuit 11 and an amplifier circuit 12. The input terminal of the clamping circuit 11 is connected to the elevator safety circuit 30, and the output terminal of the clamping circuit 11 is connected to the amplifier circuit 12. The output terminal of the amplifier circuit 12 is connected to the safety control circuit 20. The clamping circuit 11 and the amplifier circuit 12 are used to convert the first electrical signal of the elevator safety circuit 30 into the second electrical signal required by the safety control circuit 20.

[0045] Understandably, the second electrical signal can be used to power elevator safety and the safety brake.

[0046] like Figure 2 As shown, the amplifier circuit 12 includes a first amplifier circuit 121 and a second amplifier circuit 122;

[0047] The first amplifier circuit 121 is connected to the elevator safety circuit 30 and is used to adjust the first electrical signal of the elevator safety circuit 30 so as to output the third electrical signal.

[0048] The second amplifier circuit 122 is connected to the first amplifier circuit 121 and is used to regulate the voltage of the third electrical signal to output the second electrical signal.

[0049] The first amplifier circuit 121 and the second amplifier circuit 122 perform two-stage voltage regulation on the first electrical signal, thereby reducing the ripple of the elevator controller, reducing the possibility of oscillation of the upper and lower tubes, increased EMI, or even tube blow-up, and improving the safety and reliability of the elevator controller.

[0050] like Figure 3 As shown, the power conversion circuit 10 also includes a first filter circuit 13 and a current regulation circuit 14;

[0051] After the first filter circuit 13 is connected to the current regulation circuit 14, it is connected to the clamping circuit 11.

[0052] The first filter circuit 13 and the current regulation circuit 14 are used to filter the first electrical signal and regulate the current.

[0053] The current regulation circuit 14 enables the adaptation of the operating current of the components in the first clamping circuit 11 and the first amplification circuit 121. The first filter circuit 13 enables the stabilization of the first electrical signal.

[0054] like Figure 4 As shown, the power conversion circuit 10 also includes a second filter circuit 15 and a third filter circuit 16. The second filter circuit 15 is connected to the first amplifier circuit 121, and the third filter circuit 16 is connected to the second amplifier circuit 122. The second filter circuit 15 is used to filter the third electrical signal, and the third filter circuit 16 is used to filter the second electrical signal.

[0055] The second filter circuit 15 and the third filter circuit 16 are used to stabilize the second and third electrical signals, thereby improving the reliability and stability of the elevator controller.

[0056] It is understood that the safety control circuit 20 includes a safety brake circuit and a safety torque shutdown circuit, and the power conversion circuit 10 includes a first power conversion circuit 10 and a second power conversion circuit 10. The first power conversion circuit 10 is used to convert the first electrical signal of the elevator safety circuit 30 into the second electrical signal required by the safety brake circuit, and the second power conversion circuit 10 is used to convert the first electrical signal of the elevator safety circuit 30 into the second electrical signal required by the safety torque shutdown circuit.

[0057] The power conversion circuit 10, including the first power conversion circuit 10 and the second power conversion circuit 10, enables dual power supply for the safety brake circuit and the elevator safety circuit 30, thus enriching the product's functionality.

[0058] like Figure 5 As shown, the elevator safety circuit 30 includes a switch circuit 31 and a transformer 32. The input terminal of the switch circuit 31 is connected to a high-voltage electrical signal, the output terminal of the switch circuit 31 is connected to the input terminal of the transformer 32, and the output terminal of the transformer 32 is connected to the power conversion circuit 10.

[0059] Understandably, 220VAC (power supply AC) is converted to 110VAC (i.e. input AC) by the power frequency transformer 32T1. In some high-rise buildings, the AC may be appropriately increased to 125VAC. After passing through safety switch K1, speed limiter, buffer, safety clamp, etc., it passes through the car door locks and door lock switches K2 on each floor before reaching the door lock. Therefore, the voltage at the door lock end is limited by the actual 220VAC voltage input from the power grid, the number of floors, and whether it is a through door, resulting in a wide voltage range.

[0060] In practice, the voltage at the end of the door lock is controlled by a relay (not shown in the figure) and then connected to the transformer 32. After being processed by the transformer 32 and various amplifier circuits 12, two second electrical signals with low ripple voltage (24V and 5V) are generated. The 24V second electrical signal is the power supply for stopping the elevator, and the 5V second electrical signal is controlled by a relay (not output in the figure) and then used as the power supply for the safety brake.

[0061] Figure 6 This illustration shows a partial example circuit structure of an elevator controller provided by an embodiment of the present invention. For ease of explanation, only the parts relevant to the embodiment of the present invention are shown, and are described in detail below:

[0062] Both the first amplifier circuit 121 and the second amplifier circuit 122 include a common-base amplifier module.

[0063] The common-base amplifier module includes a first switching device Q1, a first thyristor Z01, a first resistor R1, a second resistor R2, and a third resistor R3. The collector of the first switching device Q1 is connected to the first end of the first resistor R1 and together they form the input terminal of the common-base amplifier module. The base of the first switching device Q1 is connected to the second end of the first resistor R1 and the negative terminal of the first thyristor Z01, respectively. The emitter of the first switching device Q1 is connected to the first end of the second resistor R2 and together they form the output terminal of the common-base amplifier module. The second end of the second resistor R2 is connected to the first end of the third resistor R3 and the control terminal of the first thyristor Z01, respectively. The positive terminal of the first thyristor Z01 and the second end of the third resistor R3 are connected to the power supply ground.

[0064] It should be noted that when the common-base amplifier module is applied to the first amplifier circuit 121, the input terminal of the common-base amplifier module is connected to the current adjustment circuit 14 and the clamping circuit 11 to receive the clamped first electrical signal; the output terminal of the common-base amplifier module is connected to the second filter circuit 15 and the second amplifier circuit 122 to output the third electrical signal.

[0065] When the common-base amplifier module is used in the second amplifier circuit 122, the input terminal of the common-base amplifier module is connected to the second filter circuit 15 and the first amplifier circuit 121 to receive the filtered third electrical signal; the output terminal of the common-base amplifier module is connected to the third filter circuit 16 to output the second electrical signal.

[0066] The common-base amplifier module also includes a first capacitor C1, a second capacitor C2, a third capacitor C3, and a fourth resistor R4.

[0067] The first terminal of the first capacitor C1 is connected to the collector of the first switching device Q1 and the first terminal of the first resistor R1, respectively; the first terminal of the second capacitor C2 is connected to the first terminal of the fourth resistor R4, the base of the first switching device Q1, the second terminal of the first resistor R1, and the negative terminal of the first thyristor Z01, respectively; the second terminal of the second capacitor C2, the first terminal of the third capacitor C3, the second terminal of the second resistor R2, the first terminal of the third resistor R3, and the control terminal of the first thyristor Z01, respectively; the second terminal of the fourth resistor R4 is connected to the second terminal of the third capacitor C3; the second terminal of the first capacitor C1 is connected to the power supply ground.

[0068] A resistor-capacitor network, including the second capacitor C2, the third capacitor C3, and the fourth resistor R4, forms a feedback loop of the common-base amplifier module, which is used to adjust the base voltage of the first switching device Q1.

[0069] The first filter circuit 13 includes a fourth capacitor C4; the first end of the fourth capacitor C4 constitutes the input terminal and the output terminal of the first filter circuit 13, and the second end of the fourth capacitor C4 is connected to the power supply ground.

[0070] It should be noted that in the first filter circuit 13, the input terminal and the output terminal of the first filter circuit 13 are connected to the current adjustment circuit 14 and the amplifier circuit 12 to receive the first electrical signal and output the filtered first electrical signal.

[0071] The second filter circuit 15 includes a fifth capacitor C5; the first end of the fifth capacitor C5 constitutes the input terminal and the output terminal of the second filter circuit 15, and the second end of the fifth capacitor C5 is connected to the power supply ground.

[0072] It should be noted that in the second filter circuit 15, the input terminal and the output terminal of the second filter circuit 15 are connected to the first amplifier circuit 121 and the second amplifier circuit 122 to receive the third electrical signal and output the filtered third electrical signal.

[0073] The third filter circuit 16 includes a sixth capacitor C6; the first end of the sixth capacitor C6 forms the input terminal and the output terminal of the second filter circuit 15, and the second end of the sixth capacitor C6 is connected to the power supply ground.

[0074] It should be noted that in the third filter circuit 16, the input terminal and the output terminal of the third filter circuit 16 are connected to the second amplifier circuit 122 to receive the second electrical signal and output the filtered second electrical signal.

[0075] The current regulation circuit 14 includes a ninth resistor R9.

[0076] The first end of the ninth resistor R9 forms the input terminal of the current regulation circuit 14, and the second end of the ninth resistor R9 forms the output terminal of the current regulation circuit 14.

[0077] The clamping circuit 11 includes a first Zener diode Z1. The first end of the first Zener diode Z1 is connected to the first end of the first resistor R1 and the collector of the first switching device Q1, respectively. The second end of the first Zener diode Z1 is connected to the power supply ground.

[0078] If the input voltage of the common-base amplifier module is greater than the maximum withstand voltage of the first thyristor Z01, the first thyristor Z01 will be damaged by overvoltage. Therefore, it is necessary to set the first Zener diode Z1 for clamping.

[0079] The minimum operating current of the first Zener diode Z1, the minimum operating current of the first thyristor Z01, and the operating current of the first switching device Q1 need to be considered in order to set the resistance value of the ninth resistor R9 and the resistance value of the first resistor R1.

[0080] The following is based on the working principle. Figure 6 Further explanation is provided below:

[0081] The fourth capacitor C4 filters the first electrical signal and outputs the filtered first electrical signal to the first terminal of the ninth resistor R9. The ninth resistor R9 adjusts the current of the filtered first electrical signal and outputs the adjusted first electrical signal to the negative terminal of the first Zener diode Z1. The first Zener diode Z1 clamps the adjusted first electrical signal and outputs the clamped first electrical signal to the first amplifier circuit 121.

[0082] In the first amplifier circuit 121, the collector of the first switching device Q1 and the first terminal of the first resistor R1 are connected to the clamped first electrical signal. The common-base amplifier circuit 12 of the first switching device Q1 amplifies the clamped first electrical signal and outputs a third electrical signal from the emitter of the first switching device Q1. The first thyristor Z01 is used to adjust the base voltage of the first switching device Q1. The second resistor R2 and the third resistor R3 are used to divide the third electrical signal to form a feedback loop. The RC network including the second capacitor C2, the third capacitor C3 and the fourth resistor R4 forms another feedback loop. The two feedback loops together realize the feedback adjustment of the base voltage of the first switching device Q1. The fourth capacitor R4 filters the third electrical signal and outputs the filtered third electrical signal to the second amplifier circuit 122.

[0083] In the second amplifier circuit 122, the collector of the first switching device Q1 and the first terminal of the first resistor R1 are connected to the filtered third electrical signal. The common-base amplifier circuit 12 of the first switching device Q1 amplifies the filtered third electrical signal and outputs a second electrical signal from the emitter of the first switching device Q1. The first thyristor Z01 is used to adjust the base voltage of the first switching device Q1. The second resistor R2 and the third resistor R3 are used to divide the second electrical signal to form a feedback loop. The RC network including the second capacitor C2, the third capacitor C3 and the fourth resistor R4 forms another feedback loop. The two feedback loops together realize the feedback adjustment of the base voltage of the first switching device Q1. The fourth capacitor R4 filters the second electrical signal and outputs the filtered second electrical signal.

[0084] This utility model embodiment also provides an elevator, which includes the elevator controller described above.

[0085] Understandably, due to the large differences in floor levels, the large differences in door lock voltage drop between single doors and through doors, and the fact that the power grid input itself has a certain range, the high-voltage power input of the safety circuit is very wide, making it difficult to be compatible with reliable output under the lowest and highest input voltages. Through the elevator, including the elevator controller mentioned above, a wide range of inputs and reliable low-voltage output are achieved.

[0086] In elevators, the power supply for the safety brake needs to power the digital isolator driven by the control isolation power supply. Therefore, there are certain requirements for power supply ripple. Small loads can easily lead to large output ripple of the elevator controller, which in turn leads to large drive ripple of the digital isolation power supply. This can easily cause oscillation of the upper and lower transistors, resulting in a significant increase in EMI or even a direct-through transistor failure. By using elevator controllers, including the one mentioned above, the elevator controller ripple is reduced, drive oscillation is reduced, and electromagnetic interference (EMI) is reduced. This effectively reduces the risk of direct-through transistor failure and improves the safety and reliability of the elevator controller.

[0087] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0088] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. An elevator controller, characterized in that, include: Power conversion circuit and safety control circuit; The power conversion circuit includes a clamping circuit and an amplification circuit. The input terminal of the clamping circuit is connected to the elevator safety circuit, the output terminal of the clamping circuit is connected to the amplification circuit, and the output terminal of the amplification circuit is connected to the safety control circuit. The clamping circuit and the amplification circuit are used to convert the first electrical signal of the elevator safety circuit into the second electrical signal required by the safety control circuit.

2. The elevator controller as described in claim 1, characterized in that, The amplifier circuit includes a first amplifier circuit and a second amplifier circuit; The first amplifier circuit is connected to the elevator safety circuit and is used to adjust the first electrical signal of the elevator safety circuit to output a third electrical signal. The second amplifier circuit is connected to the first amplifier circuit and is used to regulate the voltage of the third electrical signal to output the second electrical signal.

3. The elevator controller as described in claim 2, characterized in that, Both the first amplifier circuit and the second amplifier circuit include a common-base amplifier module; The common-base amplifier module includes a first switching device, a first thyristor, a first resistor, a second resistor, and a third resistor; The collector of the first switching device is connected to the first end of the first resistor and together they form the input terminal of the common-base amplifier module; The base of the first switching device is connected to the second terminal of the first resistor and the negative terminal of the first thyristor, respectively. The emitter of the first switching device is connected to the first end of the second resistor and together they form the output terminal of the common-base amplifier module; The second end of the second resistor is connected to the first end of the third resistor and the control terminal of the first thyristor, respectively. The positive terminal of the first thyristor and the second end of the third resistor are connected to the power supply ground.

4. The elevator controller as described in claim 3, characterized in that, The common-base amplifier module also includes a first capacitor, a second capacitor, a third capacitor, and a fourth resistor; The first terminal of the first capacitor is connected to the collector of the first switching device and the first terminal of the first resistor, respectively. The first terminal of the second capacitor is connected to the first terminal of the fourth resistor, the base of the first switching device, the second terminal of the first resistor, and the negative terminal of the first thyristor, respectively. The second terminal of the second capacitor is connected to the first terminal of the third capacitor, the second terminal of the second resistor, the first terminal of the third resistor, and the control terminal of the first thyristor, respectively. The second terminal of the fourth resistor is connected to the second terminal of the third capacitor; The second terminal of the first capacitor is connected to the power supply ground.

5. The elevator controller as described in claim 4, characterized in that, The clamping circuit includes a first Zener diode, the first end of which is connected to the first end of the first resistor and the collector of the first switching device, and the second end of which is connected to the power supply ground.

6. The elevator controller as described in claim 2, characterized in that, The power conversion circuit also includes a first filter circuit and a current regulation circuit; After the first filter circuit is connected to the current regulation circuit, it is connected to the clamping circuit. The first filtering circuit and the current regulation circuit are used to filter and regulate the current of the first electrical signal.

7. The elevator controller as described in claim 2, characterized in that, The power conversion circuit further includes a second filter circuit and a third filter circuit. The second filter circuit is connected to the first amplifier circuit, and the third filter circuit is connected to the second amplifier circuit. The second filter circuit is used to filter the third electrical signal, and the third filter circuit is used to filter the second electrical signal.

8. The elevator controller according to any one of claims 1 to 7, characterized in that, The safety control circuit includes a safety brake circuit and a safety torque shutdown circuit. The power conversion circuit includes a first power conversion circuit and a second power conversion circuit. The first power conversion circuit is used to convert the first electrical signal of the elevator safety circuit into the second electrical signal required by the safety brake circuit. The second power conversion circuit is used to convert the first electrical signal of the elevator safety circuit into the second electrical signal required by the safety torque shutdown circuit.

9. The elevator controller as described in claim 1, characterized in that, The elevator safety circuit includes a switch circuit and a transformer. The input terminal of the switch circuit is connected to a high-voltage electrical signal, the output terminal of the switch circuit is connected to the input terminal of the transformer, and the output terminal of the transformer is connected to the power conversion circuit.

10. An elevator, characterized in that, The elevator includes an elevator controller as described in any one of claims 1 to 9.

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