Elevator power supply circuit, equipment and elevator device
By using a direct DC power supply circuit in the elevator power supply system, the problems of energy loss and system complexity during AC power conversion are solved, thereby achieving stability in elevator operation and reducing costs.
Patent Information
- Application Number
- CN202520413803.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-10
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-03-10
AI Technical Summary
In existing technologies, the AC power conversion process in elevator power supply systems leads to energy loss and increased system complexity, and requires additional equipment such as switching power supplies and power rectifier boxes, which increases costs.
The elevator power supply circuit that uses direct DC power supply reduces the DC voltage to a suitable DC voltage through the power module and directly inputs it to the frequency converter, door operator and braking module, simplifying the voltage conversion process and reducing equipment usage.
It reduces system complexity and production costs, while improving the stability and safety of elevator operation, simplifying voltage conversion steps, and reducing the number of devices.
Smart Images
Figure CN223942586U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of elevator control circuits, and in particular to an elevator power supply circuit, equipment, and elevator device. Background Technology
[0002] In existing technology, the DC voltage from photovoltaic solar cells is converted into AC voltage at a commonly used frequency by an inverter. The AC voltage is then rectified back into DC voltage by the elevator's frequency converter, and then inverted back into AC voltage to control the motor's operation. This process involves three AC-to-DC voltage conversions, resulting in significant energy loss. Furthermore, the periodic variations in AC power also contribute to energy loss. Additionally, AC elevators require switching power supplies and rectifier boxes to accommodate these devices, increasing system complexity and cost. Utility Model Content
[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes an elevator power supply circuit that can directly input the DC power from the power module into various devices for use, without the need for additional equipment to convert it to AC power, thereby reducing the complexity and cost of the system.
[0004] This application also proposes an elevator device having the aforementioned elevator power supply circuit.
[0005] An elevator power supply circuit according to a first aspect embodiment of this application includes a power module comprising a first power board, a second power board, and a third power board. The input terminals of the first power board, the second power board, and the third power board are all connected to a DC power supply. The first power board, the second power board, and the third power board are used to reduce the DC input voltage of the DC power supply. A frequency converter includes a main board connected to the output terminal of the first power board, which provides DC power to the main board. A door operator is connected to the output terminal of the second power board, which provides DC power to the door operator. A braking module is connected to the output terminal of the third power board, which provides DC power to the braking module.
[0006] The elevator power supply circuit according to the embodiments of this application has at least the following beneficial effects: by setting up a main board, it is convenient to centrally process the data and instructions of the external circuit; by setting up a door operator, it is convenient to control the opening and closing of the elevator door; by setting up a braking module, it is convenient to ensure the stability of elevator operation and to respond in time to trigger the corresponding braking when the elevator sends an accident; and by setting up a power supply module, the current of the DC power supply is reduced to a suitable DC power and directly input to the frequency converter, door operator and braking module, so that the DC power directly supplies power to each component, which simplifies the steps of converting DC power to AC power, and correspondingly reduces the use of equipment, reduces the complexity of the system and the production cost.
[0007] According to some embodiments of this application, the elevator power supply circuit further includes a motor, the frequency converter further includes a reverser, the motor is connected to the output terminal of the reverser, the input terminal of the reverser is used to connect to a DC power supply, and the reverser is used to convert the input DC power into AC power.
[0008] According to some embodiments of this application, the braking module includes a first unidirectional diode, a second unidirectional diode, a first coil, and a second coil. The first unidirectional diode is connected in parallel with the first coil. The negative terminal of the first unidirectional diode is connected to the output terminal of the third power board, and the positive terminal of the first unidirectional diode is grounded. The second unidirectional diode is connected in parallel with the second coil. The negative terminal of the second unidirectional diode is connected to the output terminal of the third power board, and the positive terminal of the second unidirectional diode is grounded. The first coil and the second coil are used to control the opening or closing of the elevator brake arm.
[0009] According to some embodiments of this application, the braking module further includes a first resistor and a second resistor. One end of the first resistor is connected to the positive terminal of the first unidirectional diode, and the other end is connected to the first coil and grounded. One end of the second resistor is connected to the positive terminal of the second unidirectional diode, and the other end is connected to the second coil and grounded.
[0010] According to some embodiments of this application, the motor is a three-phase AC motor.
[0011] According to some embodiments of this application, the elevator power supply circuit further includes a feedback module, the input terminal of which is connected to the motor, and the output terminal of which is connected to the main board.
[0012] According to some embodiments of this application, the feedback module is an encoder.
[0013] According to some embodiments of this application, the first power board, the second power board, and the third power board are all photovoltaic power boards.
[0014] An elevator power supply device according to a second aspect embodiment of this application includes:
[0015] The elevator power supply circuit of the first aspect of this application.
[0016] The elevator power supply equipment according to the embodiments of this application has at least the following beneficial effects: by setting up a main board, it is convenient to centrally process the data and instructions of the external circuit; by setting up a door operator, it is convenient to control the opening and closing of the elevator door; by setting up a braking module, it is convenient to ensure the stability of elevator operation and to respond in time to trigger the corresponding braking when the elevator sends an accident; by setting up a power supply module, the current of the DC power supply is reduced to a suitable DC power and directly input to the frequency converter, door operator and braking module, so that the DC power directly supplies power to each component, simplifying the steps of converting DC power to AC power, and correspondingly reducing the use of equipment, reducing the complexity of the system and the production cost; and by introducing the elevator power supply circuit of this application, the structure of the elevator power supply equipment of this application is made simpler, the number of required components is reduced, and the production cost is reduced.
[0017] An elevator device according to a third aspect embodiment of this application includes:
[0018] Elevator power supply equipment according to the second aspect of this application.
[0019] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description
[0020] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:
[0021] Figure 1 This is a schematic diagram of a power module according to an embodiment of this application;
[0022] Figure 2 This is a schematic diagram showing the connection relationship between the frequency converter, the motor, and the encoder in an embodiment of this application;
[0023] Figure 3 This is a schematic diagram of the braking module circuit portion according to an embodiment of this application;
[0024] Figure 4 This is a schematic diagram of the gantry crane according to an embodiment of this application. Detailed Implementation
[0025] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.
[0026] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, 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.
[0027] In the description of this application, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.
[0028] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.
[0029] Currently, most elevators on the market use AC power. The input DC power is converted into AC voltage of a common frequency by an inverter. The AC voltage is then rectified into DC voltage by the elevator frequency converter, and then the DC voltage is inverted back into AC voltage to control the operation of the motor and other components. In this process, a lot of energy is lost due to the three AC-DC voltage conversions. The periodic changes in DC power also lead to energy loss. At the same time, the periodic changes in AC voltage may also cause instability during elevator operation, thus affecting the comfort of the ride. In addition, AC power supply also requires the use of switching power supplies and power rectifier boxes, which increases the complexity and cost of the system.
[0030] Based on this, this application proposes an elevator power supply circuit, equipment, and elevator device, which directly supplies power to each component with DC power, eliminating the need for switching power supplies and power rectifier boxes, thereby reducing the complexity and cost of the system.
[0031] The following reference Figure 1 This application describes an elevator power supply circuit according to an embodiment of the present application.
[0032] It is understood that the elevator power supply circuit of this application embodiment includes a power module, a frequency converter, a door operator, and a braking module. The power module includes a first power board, a second power board, and a third power board. The input terminals of the first power board, the second power board, and the third power board are all used to connect to a DC power supply. The first power board, the second power board, and the third power board are used to reduce the DC power input of the DC power supply. The frequency converter includes a main board, which is connected to the output terminal of the first power board. The first power board is used to provide DC power to the main board. The door operator is connected to the output terminal of the second power board, which is used to provide DC power to the door operator. The braking module is connected to the output terminal of the third power board, which is used to provide DC power to the braking module.
[0033] The beneficial effects of the elevator power supply circuit in this application embodiment are as follows: by setting up a main board, it is convenient to centrally process the data and instructions of the external circuit; by setting up a door operator, it is convenient to control the opening and closing of the elevator door; by setting up a braking module, it is possible to ensure the stability of elevator operation and respond in time to trigger the corresponding braking when the elevator sends an accident; and by setting up a power supply module, the current of the DC power supply is reduced to a suitable DC power and directly input to the frequency converter, door operator and braking module, so that the DC power directly supplies power to each component, which simplifies the steps of converting DC power to AC power, and correspondingly reduces the use of equipment, reduces the complexity of the system and the production cost.
[0034] For example, in some embodiments, reference is made to Figure 1In this embodiment, V1 is the first power board, V2 is the second power board, and V3 is the third power board. The input terminals of the first, second, and third power boards are connected to 400V DC power, which facilitates voltage reduction of the input DC power through the first, second, and third power boards. This reduces the large input DC current to a small DC current, which is then output to the main board, door operator, and braking module through the first, second, and third power boards, thus preventing damage to these components from excessive DC power. The positive output terminal of the first power board is connected to the frequency converter, and the negative output terminal is grounded, thereby providing 24V DC power to the main board. Both the positive and negative output terminals of the second power board are connected to the door operator, facilitating the control of the elevator door's opening and closing, and also providing 48V DC power to the door operator. The positive output terminal (01 terminal) of the third power board is connected to the braking module, facilitating the control of the elevator's start and stop, and the negative output terminal is grounded, thereby providing 110V DC power to the braking module. By supplying DC power to the main board, door operator, and braking module through the first, second, and third power boards, the traditional step of converting DC power to AC power is eliminated, thereby reducing the required components, circuit complexity, and cost. Furthermore, AC power has periodic variations, while DC power does not, so supplying DC power to the main board, door operator, and braking module makes the circuit more stable.
[0035] It should be noted that the elevator power supply circuit also includes a fourth power board and a lighting module. The fourth power board's input terminal is connected to a 400V DC power supply, and its positive output terminal is connected to the lighting module, providing 24V DC power to the lighting module. The lighting module's configuration facilitates centralized control of the elevator lights' on / off state. (Refer to...) Figure 4 The door operator includes a door operator frequency converter (UFD) and a door motor (M1). The second power board is connected to the door motor through the door operator frequency converter. The door operator frequency converter converts the DC power input from the second power board into AC power and then outputs it to the door motor, which facilitates precise control of the door motor.
[0036] It is understandable that the elevator power supply circuit also includes a motor, and the frequency converter also includes a reverser. The motor is connected to the output terminal of the reverser, and the input terminal of the reverser is used to connect to a DC power supply. The reverser is used to convert the input DC power into AC power.
[0037] For example, in some embodiments, reference is made to Figure 2 In this embodiment, the frequency converter also includes a reverser. The reverser and the main board are integrated into one unit, forming the frequency converter SYCZH-A1. The input terminal of the reverser receives 400 volts of DC power, and then the reverser converts the DC power into AC power and outputs it to the motor M. Compared with DC power control of the motor, AC power control of the motor is more precise and simpler.
[0038] It is understood that the braking module includes a first unidirectional diode, a second unidirectional diode, a first coil, and a second coil. The first unidirectional diode is connected in parallel with the first coil. The negative terminal of the first unidirectional diode is connected to the output terminal of the third power board, and the positive terminal of the first unidirectional diode is grounded. The second unidirectional diode is connected in parallel with the second coil. The negative terminal of the second unidirectional diode is connected to the output terminal of the third power board, and the positive terminal of the second unidirectional diode is grounded. The first coil and the second coil are used to control the opening or closing of the elevator brake arm.
[0039] For example, in some embodiments, reference is made to Figure 3 In this embodiment, the braking module further includes a first switch, a second switch, a third switch, and a fourth switch. KB1 is the first switch, KB2 is the second switch, KB3 is the third switch, and KB4 is the fourth switch. D1 is a first unidirectional diode, D2 is a second unidirectional diode, LZ1 is a first coil, and LZ2 is a second coil. The negative terminal of the first unidirectional diode is connected to the output terminal of the third power board through the first switch, and the negative terminal of the first unidirectional diode is grounded through the second switch. The first switch and the second switch maintain the same state, i.e., they are simultaneously closed or open. The negative terminal of the second unidirectional diode is connected to the output terminal of the third power board through the third switch, and the negative terminal of the second unidirectional diode is grounded through the fourth switch. The third switch and the fourth switch maintain the same state, i.e., they are simultaneously closed or open. In related technologies, an elevator includes a car, a wire rope, a brake wheel, a first brake arm, and a second brake arm. One end of the wire rope is connected to... The car is wound around the brake wheel at one end. The first and second brake arms are located on both sides of the brake wheel. When the first, second, third, and fourth switches are closed simultaneously, 110-volt DC power is supplied to the braking module. Current flows through the first and second coils, generating a magnetic field. The first coil controls the first brake arm, and the second coil controls the second brake arm, causing both brake arms to expand and contract. The brake wheel then operates normally, which in turn drives the car to operate normally. In case of an emergency, the first, second, third, and fourth switches are opened simultaneously, causing no current to flow through the first and second coils, resulting in the disappearance of the magnetic field. The first and second brake arms then return to their closed state, clamping the brake wheel and stopping its rotation. This stops the car, ensuring timely stopping of the car and passenger safety in case of an emergency.
[0040] It should be noted that the first and second switches can be controlled by the same relay to close or open simultaneously, and similarly, the third and fourth switches can also be controlled by the same relay to close or open simultaneously.
[0041] It is understandable that the braking module also includes a first resistor and a second resistor. One end of the first resistor is connected to the positive terminal of the first unidirectional diode, and the other end is connected to the first coil and grounded. One end of the second resistor is connected to the positive terminal of the second unidirectional diode, and the other end is connected to the second coil and grounded.
[0042] For example, in some embodiments, reference is made to Figure 3 In this embodiment, R1 is a first resistor and R2 is a second resistor. One end of the first resistor is connected to the negative terminal of the first unidirectional diode, and the other end is connected to the first coil and the second switch. One end of the second resistor is connected to the negative terminal of the second unidirectional diode, and the other end is connected to the second coil and the fourth switch. The first and second resistors are designed to prevent reverse current from impacting the components when the braking module is de-energized, thus avoiding damage to the components. They also dissipate the excess electromotive force of the first and second unidirectional diodes, preventing damage to the first and second unidirectional diodes.
[0043] It is understandable that the motor is a three-phase AC motor.
[0044] For example, in some embodiments, reference is made to Figure 2 In this embodiment, the motor M is a three-phase AC motor to maintain current balance and promote more stable motor operation. The U, V, and W terminals are the ports where the converter outputs three-phase AC power to the motor.
[0045] It is understandable that the elevator power supply circuit also includes a feedback module. The input of the feedback module is connected to the motor, and the output of the feedback module is connected to the main board.
[0046] For example, in some embodiments, reference is made to Figure 2 In this embodiment, the input end of the feedback module is used to connect to the motor so as to receive data such as the motor's rotational position, angular velocity, and angular displacement in real time. The output end of the feedback module is connected to the motherboard so as to facilitate the feedback of the motor's status to the motherboard. The motherboard and the motor are also connected. The motherboard controls the operation of the motor. When the motor experiences overspeed or stalling, the feedback module can promptly feed back the relevant signals to the motherboard so that the motherboard can adjust the motor speed and thus maintain the stable operation of the motor.
[0047] It is understandable that the feedback module is an encoder.
[0048] For example, in some embodiments, reference is made to Figure 2 In this embodiment, PG is an encoder. The encoder is connected to the motherboard through the encoder frequency divider card MCTC-PG-E, so that the signal output by the encoder can be received by the motherboard through the adjustment of the encoder frequency divider card.
[0049] It is understandable that the first power board, the second power board, and the third power board are all photovoltaic power boards.
[0050] For example, in some embodiments, the first power board, the second power board, and the third power board are all photovoltaic power boards in order to save costs.
[0051] The elevator power supply device according to the second aspect of the application includes the elevator power supply circuit of the first aspect of the application described above.
[0052] According to the elevator power supply circuit of this application embodiment, by setting up a main board, it is convenient to centrally process the data and instructions of the external circuit; by setting up a door operator, it is convenient to control the opening and closing of the elevator door; by setting up a braking module, it is convenient to ensure the stability of elevator operation and to respond in time to trigger the corresponding braking when the elevator sends an accident; and by setting up a power supply module, the current of the DC power supply is reduced to a suitable DC power and directly input to the frequency converter, door operator and braking module, so that the DC power directly supplies power to each component, simplifying the steps of converting DC power to AC power, and correspondingly reducing the number of equipment used, reducing the complexity of the system and the production cost. By introducing the elevator power supply circuit of this application, the structure of the elevator power supply equipment of this application is made simpler, the number of required components is reduced, and the production cost is reduced.
[0053] Since the elevator power supply equipment includes the elevator power supply circuit of the first aspect embodiment, the corresponding contents of the elevator power supply circuit of the first aspect embodiment can be applied to the elevator power supply equipment of the second aspect, and have the same implementation principle and technical effect. To avoid redundancy, it will not be described in detail here.
[0054] The elevator apparatus according to a third aspect of this application includes the elevator power supply equipment described in the second aspect of this application.
[0055] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application.
Claims
1. An elevator power supply circuit, characterized in that, include: A power module, comprising a first power board, a second power board, and a third power board, wherein the input terminals of the first power board, the second power board, and the third power board are all used to connect to a DC power supply, and the first power board, the second power board, and the third power board are used to reduce the DC input voltage of the DC power supply. A frequency converter, the frequency converter including a main board, the main board being connected to the output terminal of a first power board, the first power board being used to provide DC power to the main board; The door operator is connected to the output terminal of the second power board, which provides DC power to the door operator. A braking module is provided, which is connected to the output terminal of the third power board, which provides DC power to the braking module.
2. The elevator power supply circuit according to claim 1, characterized in that, It also includes a motor, and the frequency converter also includes a reverser. The motor is connected to the output terminal of the reverser, and the input terminal of the reverser is used to connect to a DC power supply. The reverser is used to convert the input DC power into AC power.
3. The elevator power supply circuit according to claim 1, characterized in that, The braking module includes a first unidirectional diode, a second unidirectional diode, a first coil, and a second coil. The first unidirectional diode is connected in parallel with the first coil. The negative terminal of the first unidirectional diode is connected to the output terminal of the third power board, and the positive terminal of the first unidirectional diode is grounded. The second unidirectional diode is connected in parallel with the second coil. The negative terminal of the second unidirectional diode is connected to the output terminal of the third power board, and the positive terminal of the second unidirectional diode is grounded. The first coil and the second coil are used to control the opening or closing of the elevator brake arm.
4. The elevator power supply circuit according to claim 3, characterized in that, The braking module further includes a first resistor and a second resistor. One end of the first resistor is connected to the positive terminal of the first unidirectional diode, and the other end is connected to the first coil and grounded. One end of the second resistor is connected to the positive terminal of the second unidirectional diode, and the other end is connected to the second coil and grounded.
5. The elevator power supply circuit according to claim 2, characterized in that, The motor is a three-phase AC motor.
6. The elevator power supply circuit according to claim 2, characterized in that, It also includes a feedback module, the input of which is connected to the motor, and the output of which is connected to the motherboard.
7. The elevator power supply circuit according to claim 6, characterized in that, The feedback module is an encoder.
8. The elevator power supply circuit according to claim 1, characterized in that, The first power board, the second power board, and the third power board are all photovoltaic power boards.
9. An elevator power supply device, characterized in that, include: The elevator power supply circuit according to any one of claims 1 to 8.
10. An elevator device, characterized in that, include: The elevator power supply equipment as described in claim 9.