Dial-adjustable output combined power supply system special for elevator

Abstract

The invention discloses a dial-adjustable output combined power supply system special for an elevator, and the system comprises a mounting housing which comprises a top plate, a front side plate, a rear side plate, a left side plate and a right side plate, and the inner side of the top plate is provided with an indicator lamp panel; a power supply circuit board is installed on the front side plate and provided with a system control power supply circuit and an in-board auxiliary power supply circuit, and the input end of a commercial alternating current power supply is connected with a relay circuit, the in-board auxiliary power supply circuit and a door machine power supply protection circuit. An elevator load circuit board is installed on the rear side plate, the elevator load circuit board comprises a band-type brake coil power supply circuit, a control cabinet mainboard power supply circuit and a safety loop power supply circuit, and the output end of the relay circuit is connected with the band-type brake coil power supply circuit, the control cabinet mainboard power supply circuit and the safety loop power supply circuit through a first rectifying circuit; and heat dissipation devices are mounted on the left side plate and the right side plate. According to the invention, multi-path output integration can be realized, the operation efficiency is high, the power supply volume is reduced, the installation is convenient, and the cost is low.

Description

Technical Field

[0001] The invention relates to the technical field of power supply for elevators, and in particular to an output combined power supply system which can be adjusted by dialing code and is special for elevators. Background Art

[0002] Elevators are essential means of transportation in buildings, especially for high-rise buildings. They are essential electrical equipment. Elevators are classified into different types due to different building types or usage scenarios. Each elevator is composed of a large number of electrical components, and the working parameters of each elevator component are different. For example, the rated working voltages of different electrical components are different. Therefore, a special voltage conversion device is required to convert the voltage of the external power grid into a specific working voltage for the electrical components in the elevator. In the prior art, linear power supplies are generally used to provide working voltage for the electrical components in the elevator, and the most commonly used one is the power frequency transformer of the power supply.

[0003] like Figure 1 As shown, it is a structural distribution diagram of the elevator control cabinet in the prior art, including a frequency converter module 1, a brake resistor module 2, an electronic board module 3, a main circuit module 4, an engineering wiring module 5, a transformer module 6 and a power supply module 7. This form of power supply is large in size, high in cost, low in efficiency, and only about 40% in working efficiency. For the power supply of the elevator system, elevators usually use distributed independent power supply in the past. The power supply of each functional module requires an independent circuit supply, especially the power supply of the host system and the safety circuit, which is generally completed by a power frequency isolation transformer. However, the power frequency transformer itself has the following problems: large volume and weight, low efficiency, unable to maintain the long-term operation of the elevator; the voltage stabilization loss is relatively large, and power frequency noise will be generated during operation. The output voltage is not easy to adjust, and the complexity of the system may increase, and it is necessary to consider the configuration and management of multiple transformers in parallel and series; copper is used more and the cost is high.

[0004] In view of this, there is an urgent need to develop an output power system dedicated to elevators, so as to achieve fast, efficient and reliable elevator product design, make the output voltage easy to adjust, and cope with the diversity of customized elevator manufacturing needs. Summary of the invention

[0005] The problem to be solved by the present invention is that the independent power supply module of the elevator distributed independent power supply in the prior art is not conducive to the trend of miniaturization of elevator products, has low reliability and insufficient stability, resulting in low efficiency of the overall operation of the elevator.

[0006] In order to solve the above technical problems, the present invention provides an output combined power supply system for elevators that can be adjusted by dial codes, including: an installation shell, which is a cube, and the installation shell includes a top plate, a front side plate, a rear side plate, a left side plate and a right side plate, and an indicator light board is installed on the inner side of the top plate; a power supply circuit board is installed on the front side plate, and the power supply circuit board is provided with a system control power supply circuit and an auxiliary power supply circuit in the board, the input end of the AC power supply is connected to a relay circuit, an auxiliary power supply circuit in the board and a door machine power supply protection circuit, the system control power supply circuit includes an MCU circuit and sampling circuits of each power supply module connected thereto, a voltage adjustment dial switch circuit, a DC / DC step-down circuit and an LED indication circuit, and the system control The power supply circuit connects the auxiliary power supply circuit in the board; the elevator load circuit board is installed on the rear side panel, and the elevator load circuit board includes a brake coil power supply circuit, a control cabinet mainboard power supply circuit and a safety circuit power supply circuit. The output end of the relay circuit is connected to the brake coil power supply circuit, the control cabinet mainboard power supply circuit and the safety circuit power supply circuit through the first rectifier circuit; the left panel and the right side panel are installed with a heat dissipation device; wherein, the brake coil power supply circuit, the control cabinet mainboard power supply circuit and the safety circuit power supply circuit all include a DC / DC conversion circuit, the DC / DC conversion circuit is connected to the first rectifier circuit, and the DC / DC conversion circuit includes a power switch and a transformer, so as to reduce the voltage of the input power supply.

[0007] According to an embodiment of the present application, the on-board auxiliary circuit includes a second rectifier circuit, a DC / DC conversion circuit, an output filter circuit group, a voltage feedback circuit and a PWM control circuit, and the DC / DC conversion circuit includes a power switch and a transformer; the second rectifier circuit converts alternating current into direct current, the DC / DC conversion circuit reduces the voltage of the direct current and allows it to flow into the output filter circuit group, the voltage feedback circuit transmits the voltage signal of the output filter circuit group to the PWM control circuit, the PWM control circuit controls and adjusts the duty cycle of the power switch according to the voltage signal of the voltage feedback circuit, so that the DC / DC conversion circuit reduces the voltage of the power supply and allows it to flow to the output filter circuit group, and the output filter circuit group outputs the supply voltage to the system control power supply circuit.

[0008] According to an embodiment of the present application, the bottom edges of the front side plate and the rear side plate are provided with short mounting edges extending outward, and circular mounting holes and U-shaped mounting holes are respectively provided at both ends of the short mounting edges.

[0009] According to an embodiment of the present application, the top panel surface displays an indicator light group and a dip switch on the indicator light board, and the indicator light group includes an AC power input indicator light group, a brake coil power supply indicator light group, a control cabinet mainboard power supply indicator light group, a safety circuit power supply indicator light group and a door machine power supply protection circuit indicator light group.

[0010] According to an embodiment of the present application, the dip switch is of embedded design, and the dip switch is flush with the corresponding panel of the mounting housing.

[0011] According to an embodiment of the present application, the heat dissipation device includes an air hole group on the left panel and the right panel, a heat dissipation fan is provided at a location corresponding to the air hole group inside the left panel, and a heat dissipation fan is also provided at a location corresponding to the air hole group inside the right panel.

[0012] According to an embodiment of the present application, the front side panel and the left side panel are a first panel that is integrally formed and bent at a right angle, and the top panel and the rear side panel are a second panel that is integrally formed and bent at a right angle.

[0013] According to the embodiment of the present application, the first panel and the second panel are fixedly assembled at their joints using countersunk bolts, and the right side panel is connected to the first panel and the second panel using countersunk bolts.

[0014] According to an embodiment of the present application, the mounting shell is made of iron material.

[0015] According to an embodiment of the present application, a terminal row is provided between the power supply circuit board and the elevator load circuit board to achieve a linear connection between the two.

[0016] The beneficial effects of the technical solution of the present invention compared with the prior art are:

[0017] 1. By improving the existing elevator control system, the industrial frequency transformer module is replaced with the combined power supply system of the application in the existing elevator control system, and the power supply circuit, load circuit and safety circuit are integrated on two electronic boards, which reduces the volume of the elevator power supply. For each different building, the different requirements of elevator size, power, lifting height, etc., this combination can meet the requirements at a lower cost. A dip switch is provided on the power supply circuit, and a certain circuit can adjust the output voltage by dialing, breaking the disadvantage that the output voltage is not easy to adjust, and the product parameters can be easily changed to meet customer needs.

[0018] 2. In the combined power supply system of the present application, the system control power supply circuit chooses to use a dial to adjust the output voltage according to the actual load demand, and sets the required voltage level through the dial switch to achieve multi-channel output integration. It has high overall performance and excellent cost performance, ensuring the safety and stability of the elevator power supply and improving the efficiency of the elevator power supply operation.

[0019] 3. The present application installs the electronic board on the inner wall of a hollow installation shell, which is convenient to install. The installation adopts a non-invasive installation method and will not damage the original elevator control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is the internal distribution diagram of the elevator control cabinet in the prior art;

[0021] Figure 2A schematic diagram of the three-dimensional structure of an output combined power supply system for elevators that can be adjusted by dialing an encoder as an example of the present invention;

[0022] Figure 3 for Figure 2 A top view of

[0023] Figure 4 for Figure 2 A front view of

[0024] Figure 5 for Figure 2 Side view of

[0025] Figure 6 This is a circuit diagram of an output combined power supply system for elevators that can be adjusted by dialing a code as an example of the present invention;

[0026] Figure 7 It is a schematic diagram of the indicator light group installed on the top plate of the shell in an example of the present invention.

[0027] The following are the descriptions of the reference numerals:

[0028] 1. Inverter module, 2. Braking resistor module, 3. Electronic board module, 4. Main circuit module, 5. Engineering wiring module, 6. Transformer module, 7. Power supply module, 10. Installation shell, 11. Front side panel, 12. Rear side panel, 13. Left side panel, 14. Right side panel, 15. Top panel, 111. Installation short side, 131. Air hole group, 151. AC power input indicator light group, 152. Power supply indicator light group of brake coil, 153. Power supply indicator light group of control cabinet mainboard, 154. Power supply indicator light group of safety circuit, 155. Power supply protection circuit indicator light group of door machine. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. The following embodiments are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0030] As for the power supply of elevator systems, elevators usually use distributed independent power supply in the past. The power supply of each functional module requires independent circuit supply, especially the power supply of the host system and the safety circuit, which is generally completed by the power frequency isolation transformer. The power frequency isolation transformer has many disadvantages, such as the need for a large number of iron cores and coils, the large equipment size, and the high hysteresis loss and copper loss, which makes the energy conversion efficiency of the power frequency isolation transformer low; it is easy to generate mechanical vibration and noise during operation; its output voltage is greatly affected by the fluctuation of the power grid, so it is necessary to add a rectifier and filter module for DC output; the independent power supply for each functional module of the elevator takes up a lot of space.

[0031] See also Figures 2 to 6As shown, a dial-adjustable output combined power supply system for elevators is shown, which replaces the original linear power supply and also combines the brake coil power supply, system control power supply, safety circuit power supply and control cabinet mainboard power supply, and has high operating efficiency, reduced power supply volume, easy installation and low cost.

[0032] In this embodiment, Figure 2 As shown, the installation shell 10 of the combined power supply system is a cube, and the installation shell 10 includes a top plate 15, a front side plate 11, a rear side plate 12, a left side plate 13 and a right side plate 14. The four side plates are vertically arranged along the four sides of the top plate 15 and connected in sequence to form a cavity with an open bottom and a hollow interior with the bottom plate.

[0033] Specifically, the bottom edges of the front side panel 11 and the rear side panel 12 are provided with outwardly extending short mounting edges 111, and circular mounting holes and U-shaped mounting holes are respectively provided at both ends of the short mounting edges 111. Fixing components such as screws and nuts can pass through the mounting holes to fix the entire mounting shell 10 in the control cabinet.

[0034] Specifically, Figure 2 As shown, the front side panel 11 and the left side panel 13 are integrally formed, right-angled first panels, the top panel 15 and the rear side panel 12 are integrally formed, right-angled second panels, the first panel and the second panel are fixed and assembled at the joints with countersunk bolts, and the right side panel 14 is connected to the first panel and the second panel with countersunk bolts, and the overall connection of the installation housing 10 is simple and fast. The side panels are set as integrally formed right-angled panels, which are easy to splice and install, and are simple to make, and can be mass-produced in factories.

[0035] Specifically, each panel of the mounting housing 10 may also be replaced by a beam structure, which makes the overall assembly easier because each component is mounted on a circuit board, and the circuit board can be mounted on the beam structure.

[0036] Specifically, the mounting housing 10 may be preferably made of iron material, which is low in cost.

[0037] In this embodiment, an indicator light board is installed inside the top plate 15, and the indicator light board is connected to the LED indication circuit.

[0038] Specifically, Figure 7 As shown, the surface of the top plate 15 displays the indicator light group and the dip switch on the indicator light board, and the indicator light group includes an AC power input indicator light group 151, a brake coil power supply indicator light group 152, a control cabinet mainboard power supply indicator light group 153, a safety circuit power supply indicator light group 154 ​​and a door machine power supply protection circuit indicator light group 155.

[0039] Specifically, the dip switch is of embedded design, and the dip switch is flush with the corresponding panel of the mounting housing 10, so it will not be accidentally touched.

[0040] In this embodiment, a heat dissipation device is installed on the left side plate 13 and the right side plate 14. Specifically, the heat dissipation device includes an air hole group 131 on the left side plate 13 and the right side plate 14, and a heat dissipation fan is provided at a location corresponding to the air hole group 131 in the left side plate 13, and a heat dissipation fan is also provided at a location corresponding to the air hole group 131 in the right side plate 14.

[0041] In this embodiment, a power supply circuit board is installed on the front side panel 11. The power supply circuit board is provided with a system control power supply circuit and an auxiliary power supply circuit inside the board. The input end of the AC power supply is connected to the relay circuit, the auxiliary power supply circuit inside the board and the door machine power supply protection circuit.

[0042] Specifically, the system control power supply circuit includes the MCU circuit and the sampling circuits of each power supply module connected thereto, the voltage adjustment dial switch circuit, the DC / DC buck circuit and the LED indication circuit. The system control power supply circuit is connected to the auxiliary power supply circuit in the board. Among them, the DC / DC buck circuit converts the voltage into a voltage value suitable for the MCU circuit through a voltage stabilizer, and the sampling circuit includes current, voltage, and signal sampling circuits of each power supply module. The MCU circuit determines the working status of the power supply by reading the signals of these sampling circuits and gives feedback in time; the LED indication circuit is used for the MCU circuit to control the indicator light on and off through the judgment of the power supply status.

[0043] Specifically, the auxiliary circuit in the board includes a second rectifier circuit, a DC / DC conversion circuit, an output filter circuit group, a voltage feedback circuit and a PWM control circuit. The DC / DC conversion circuit includes a power switch and a transformer; the second rectifier circuit converts AC power into DC power, the DC / DC conversion circuit reduces the voltage of the DC power and allows it to flow into the output filter circuit group, the voltage feedback circuit transmits the voltage signal of the output filter circuit group to the PWM control circuit, the PWM control circuit controls and adjusts the duty cycle of the power switch according to the voltage signal of the voltage feedback circuit, so that the DC / DC conversion circuit reduces the voltage of the power supply and allows it to flow to the output filter circuit group, and the output filter circuit group outputs the power supply voltage to the system control power supply circuit.

[0044] Specifically, the door machine power supply protection circuit is used for the door machine power supply AC220V, with filtering and overvoltage protection.

[0045] In this embodiment, an elevator load circuit board is installed on the rear side plate 12, and the elevator load circuit board includes a brake coil power supply circuit, a control cabinet mainboard power supply circuit and a safety circuit power supply circuit. The output end of the relay circuit is connected to the brake coil power supply circuit, the control cabinet mainboard power supply circuit and the safety circuit power supply circuit through the first rectifier circuit.

[0046] Specifically, a terminal row is provided between the power supply circuit board and the elevator load circuit board to achieve a linear connection between the two.

[0047] Specifically, the power supply circuit board and the elevator load circuit board are respectively installed on the inner walls of two opposite side panels, and the installation can be done on the front and rear side panels 12 or the left and right side panels 14.

[0048] Specifically, the brake coil power supply circuit includes a DC / DC conversion circuit, an output filter circuit, an output sampling circuit, a PWM control circuit, an input sampling circuit, a fault signal detection circuit and a brake voltage reference signal circuit, wherein the DC / DC conversion circuit: includes a power switch and a transformer to step down the power supply; the output filter circuit: outputs the brake power supply voltage; the output sampling circuit: feeds back the sampled output voltage to the PWM control circuit; the PWM control circuit: adjusts the duty cycle of the power switch through the voltage signal control of the voltage feedback circuit; the input sampling circuit: feeds back the sampled output voltage to the PWM control circuit; the fault signal detection circuit: feeds back the sampled output voltage to the PWM control circuit; the brake voltage reference signal circuit: feeds back the sampled output voltage to the PWM control circuit.

[0049] Specifically, the control cabinet mainboard power supply circuit includes a DC / DC conversion circuit, an output filter circuit, a voltage feedback circuit, a voltage feedback circuit and a PWM control circuit, wherein the DC / DC conversion circuit: includes a power switch and a transformer to step down the power supply; the output filter circuit: outputs the gate machine power supply voltage; the voltage feedback circuit: samples the output voltage and feeds it back to the PWM control circuit; the PWM control circuit: controls and adjusts the duty cycle of the power switch through the voltage signal of the voltage feedback circuit.

[0050] Specifically, the brake coil power supply circuit, the control cabinet mainboard power supply circuit and the safety loop power supply circuit all include a DC / DC conversion circuit, the DC / DC conversion circuit is connected to the first rectifier circuit, and the DC / DC conversion circuit includes a power switch and a transformer, so as to reduce the voltage of the input power supply.

[0051] The working principle or process of the output combination power supply system for elevators with adjustable dial code in the present application is as follows: after the system is powered on, the system control power supply circuit first reads the state of the sampling circuit to determine whether the auxiliary power supply circuit in the board is normal. After confirming that the auxiliary power supply circuit in the board is powered normally, the MCU sends a signal to the relay through the control pin to connect the elevator load power supply circuit; according to the size, power, lifting height and other specifications of the elevator, the user sets the required voltage level through the dial switch, the system control power supply circuit reads the state of the dial switch to determine the output voltage, and the MCU adjusts the output voltage of the voltage regulation circuit according to the setting of the dial switch. The voltage regulation circuit provides the required voltage to the elevator load power supply circuit, thereby controlling the operation of the elevator. After the mains power is input, the present application achieves the required power output of various adaptive powers through the internal circuit processing of the product. The circuit board is assembled in a 5-sided rectangular iron shell through a wiring connection. Its function combines the power supply of the power frequency transformer, the power board, the safety circuit module of the safety circuit board, the brake coil power supply, and the system control power supply, and can provide a dial selection voltage function for the corresponding power supply, which can be quickly installed in the control cabinet and save space.

[0052] In summary, the technical solution of this application has the following beneficial effects:

[0053] 1. By improving the existing elevator control system, the transformer module in the existing elevator control system is replaced by the combined power supply system of this application, and the power supply circuit, load circuit and safety circuit are integrated on two electronic boards, which reduces the volume of the elevator power supply. For each different building, the different requirements of elevator size, power, lifting height, etc., this combination can meet the requirements at a lower cost. A dip switch is provided on the power supply circuit, and a certain circuit can adjust the output voltage by dialing, breaking the disadvantage that the output voltage is not easy to adjust, and the product parameters can be easily changed to meet customer needs.

[0054] 2. The combined power supply system of this application chooses to use a dial code to adjust the output voltage according to the actual load requirements, realizes multi-channel output integration, has high overall performance and excellent cost performance, ensures the safety and stability of the elevator power supply, and improves the efficiency of the elevator power supply operation.

[0055] 3. The present application installs the electronic board on the inner wall of a hollow installation shell, which is convenient to install. The installation adopts a non-invasive installation method and will not damage the original elevator control system.

[0056] The above are only preferred embodiments of the present invention, and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. An output combined power system for elevators with adjustable dial function, characterized in that: include: The installation shell is a cube, and the installation shell includes a top plate, a front side plate, a rear side plate, a left side plate and a right side plate. An indicator light panel is installed on the inner side of the top plate; The front side panel is provided with a power supply circuit board, which is provided with a system control power supply circuit and an auxiliary power supply circuit inside the board. The input end of the AC power supply is connected to the relay circuit, the auxiliary power supply circuit inside the board and the door machine power supply protection circuit. The system control power supply circuit includes an MCU circuit and sampling circuits of each power supply module connected thereto, a voltage regulation dial switch circuit, a DC / DC step-down circuit and an LED indication circuit, and the system control power supply circuit is connected to the auxiliary power supply circuit in the board; The rear side plate is provided with an elevator load circuit board, the elevator load circuit board includes a brake coil power supply circuit, a control cabinet mainboard power supply circuit and a safety circuit power supply circuit, and the output end of the relay circuit is connected to the brake coil power supply circuit, the control cabinet mainboard power supply circuit and the safety circuit power supply circuit through a first rectifier circuit; The left side plate and the right side plate are provided with heat dissipation devices; Among them, the brake coil power supply circuit, the control cabinet mainboard power supply circuit and the safety loop power supply circuit all include a DC / DC conversion circuit, the DC / DC conversion circuit is connected to the first rectifier circuit, and the DC / DC conversion circuit includes a power switch and a transformer, so as to reduce the voltage of the input power supply.

2. The output combined power supply system for elevators with dial-adjustable function according to claim 1, characterized in that: The on-board auxiliary circuit includes a second rectifier circuit, a DC / DC conversion circuit, an output filter circuit group, a voltage feedback circuit and a PWM control circuit. The DC / DC conversion circuit includes a power switch and a transformer. The second rectifier circuit converts AC power into DC power. The DC / DC conversion circuit reduces the voltage of DC power and allows it to flow into the output filter circuit group. The voltage feedback circuit transmits the voltage signal of the output filter circuit group to the PWM control circuit. The PWM control circuit controls and adjusts the duty cycle of the power switch according to the voltage signal of the voltage feedback circuit, so that the DC / DC conversion circuit reduces the voltage of the power supply and allows it to flow to the output filter circuit group. The output filter circuit group outputs the power supply voltage to the system control power supply circuit.

3. The output combined power supply system for elevators with dial-adjustable function according to claim 1, characterized in that: The bottom edges of the front side plate and the rear side plate are both provided with short mounting edges extending outwards, and two ends of the short mounting edges are respectively provided with a circular mounting hole and a U-shaped mounting hole.

4. The output combined power system for elevators with dial-adjustable function according to claim 1, characterized in that: The surface of the top panel displays the indicator light group and the dip switch on the indicator light board, and the indicator light group includes an AC power input indicator light group, a brake coil power supply indicator light group, a control cabinet mainboard power supply indicator light group, a safety circuit power supply indicator light group and a door machine power supply protection circuit indicator light group.

5. The output combined power supply system for elevators with dial-adjustable function according to claim 6, characterized in that: The dip switch is of embedded design and is flush with the corresponding panel of the mounting housing.

6. The output combined power supply system for elevators with dial-adjustable function according to claim 1 is characterized in that: The heat dissipation device includes air hole groups on the left plate and the right plate. A heat dissipation fan is arranged at a location inside the left plate corresponding to the air hole group, and a heat dissipation fan is also arranged at a location inside the right plate corresponding to the air hole group.

7. The output combined power system for elevators with dial-adjustable function according to claim 1, characterized in that: The front side panel and the left side panel are integrally formed first panels bent at right angles, and the top panel and the rear side panel are integrally formed second panels bent at right angles.

8. The output combined power system for elevators with dial-adjustable function according to claim 7, characterized in that: The first panel and the second panel are fixedly assembled at their joints by countersunk bolts, and the right side panel is connected to the first panel and the second panel by the countersunk bolts.

9. The output combined power system for elevators with dial-adjustable function according to claim 1, characterized in that: The installation shell is made of iron material.

10. The output combined power system for elevators with dial-adjustable function according to claim 1, characterized in that: A terminal row is arranged between the power supply circuit board and the elevator load circuit board to realize a linear connection between the two.

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