Power panel, power supply control method and elevator system

Abstract

The embodiment of the invention provides a power panel, a power supply control method and an elevator system.The power panel is applied to the elevator system and comprises a logic control chip, a main loop module and a power module; the input end of the main loop module is electrically connected with a power grid; the output end of the main loop module is connected with the power supply module, and the main loop module is set to provide a first direct current voltage for the power supply module; the power supply module is respectively connected with the logic control chip and electrical equipment of the elevator system, and is set to supply power to the electrical equipment under the control of the logic control chip; and the logic control chip is set to control the power supply module to carry out voltage conversion and voltage output. According to the power panel, the power supply control method and the elevator system, power can be supplied to electrical equipment of an elevator, the size is small, the weight is light, and power supply output of the elevator system can be controlled in a centralized mode.

Description

Technical Field

[0001] The present application relates to the technical field of elevator manufacturing, and more specifically, to a power supply board, a power supply control method and an elevator system. Background Art

[0002] At present, the power supply for various electrical equipment in elevators is generally located inside the elevator control cabinet and uses a transformer combined with a switching power supply to achieve the conversion between AC mains and DC power required by various electrical equipment. This power supply increases the size and weight of the control cabinet, and the output of each power supply is uncontrolled. At present, there is an urgent need for a power board in the elevator system that is small in size, light in weight, and can control the output of each power supply. Summary of the invention

[0003] The embodiments of the present application provide a power supply board, a power supply control method and an elevator system, which can not only supply power to various electrical equipment of the elevator, but also have a small size, light weight, and can centrally control the power supply output of the elevator system.

[0004] The embodiment of the present application provides a power board, which is applied to an elevator system, including:

[0005] Logic control chip, main circuit module and power module;

[0006] The input end of the main circuit module is electrically connected to the power grid; the output end of the main circuit module is connected to the power module and is configured to provide a first DC voltage to the power module;

[0007] The power supply module is connected to the logic control chip and the electrical equipment of the elevator system respectively, and is configured to convert the first DC voltage into a DC voltage under the control of the logic control chip and supply power to the electrical equipment;

[0008] The logic control chip is configured to control the power module to perform voltage conversion and voltage output.

[0009] In an exemplary embodiment, it also includes:

[0010] A main control chip connected to the logic control chip;

[0011] The power supply module is further configured to sample the output voltage and output current of the power supply module, and send the obtained voltage sampling signal and current sampling signal to the logic control chip; and output the DC voltage obtained after the DC voltage conversion by the power supply module to the electrical equipment of the elevator system when receiving the start power supply signal sent by the logic control chip; and stop supplying power to the electrical equipment of the elevator system when receiving the stop power supply signal sent by the logic control chip;

[0012] The logic control chip is further configured to receive the voltage sampling signal and the current sampling signal output by the power supply module, and send the power supply stop signal to the power supply module and send fault information to the main control chip when detecting that a first preset number of consecutive voltage sampling signals exceeds a preset voltage threshold and / or a second preset number of consecutive current sampling signals exceeds a preset current threshold; and send the power supply start signal to the power supply module when receiving a fault reset command issued by the main control chip;

[0013] The main control chip is configured to receive the fault information sent by the logic control chip, and after determining that the fault is recovered, send a fault reset command to the logic control chip.

[0014] In an exemplary embodiment, it also includes:

[0015] A memory connected to the logic control chip;

[0016] The logic control chip is further configured to write fault information into the memory when sending a power supply stop signal to the power module;

[0017] The memory is configured to store the fault information sent by the logic control chip;

[0018] The logic control chip is further configured to determine whether the memory stores fault information of the power module after power-on, and send a power supply stop signal to the power module if the fault information of the power module is stored.

[0019] In an exemplary embodiment, it also includes:

[0020] A temperature acquisition module connected to the logic control chip and a status indication module connected to the logic control chip;

[0021] The temperature acquisition module is configured to acquire the temperature of the power board and send it to the logic control chip;

[0022] The logic control chip is also configured to control the operation of a fan according to the received temperature; wherein the fan is used to cool the power board;

[0023] The logic control chip is also configured to collect and output a status signal of the power board;

[0024] The status indication module is configured to display the current status of the power board according to the status signal output by the logic control chip.

[0025] In an exemplary embodiment, the power module includes at least one of the following: an outbound call power module, a control cabinet power module, a safety chain power module, and a brake power module; the electrical equipment of the elevator system correspondingly includes at least one of the following: a safety switch, a brake coil, and an outbound call board on each floor arranged in the control cabinet and the safety chain in the elevator system;

[0026] The outbound call power supply module is configured to supply power to the outbound call board;

[0027] The control cabinet power supply module is configured to supply power to the electrical equipment in the control cabinet;

[0028] The safety chain power supply module is configured to supply power to the safety switch series circuit on the safety chain;

[0029] The brake power supply module is configured to supply power to the brake coil.

[0030] The present application provides a power supply control method, which is applied to a logic control chip of a power board described in any of the above embodiments, including:

[0031] After power-on, an enable signal and a power supply start signal are sent to the power module;

[0032] receiving a voltage sampling signal and a current sampling signal output by the power supply module, and sending a power supply stop signal to the power supply module when detecting that a first preset number of consecutive voltage sampling signals exceeds a preset voltage threshold and / or a second preset number of consecutive current sampling signals exceeds a preset current threshold;

[0033] Among them, the enable signal is used to instruct the power supply module to convert the first DC voltage output by the main circuit module into a DC voltage; the start power supply signal is used to instruct the power supply module to output the DC voltage obtained after the DC voltage conversion by the power supply module to the electrical equipment of the elevator system; the stop power supply signal is used to instruct the power supply module to stop supplying power to the electrical equipment of the elevator system.

[0034] In an exemplary embodiment, it also includes:

[0035] When a power supply stop signal is sent to the power module, fault information is sent to the main control chip;

[0036] When receiving the fault reset command sent by the main control chip, a power supply start signal is sent to the power supply module.

[0037] In an exemplary embodiment, it also includes:

[0038] When sending the fault information to the main control chip, the fault information is saved in the memory; when receiving the fault reset command issued by the main control chip, the fault information saved in the memory is deleted;

[0039] After power-on, it is determined whether the memory stores the fault information of the power module, and if the fault information of the power module is stored, the power supply stop signal is sent to the power module.

[0040] In an exemplary embodiment, it also includes:

[0041] The power supply module includes a safety chain power supply module configured to supply power to a safety switch series circuit on a safety chain in an elevator system, and when the terminal voltage signal obtained by sampling the terminal voltage of the safety chain is lower than a preset safety chain terminal voltage threshold, the power supply module gradually increases the duty cycle of the pulse signal input to the safety chain power supply module starting from a reference duty cycle according to a first preset step length until the terminal voltage signal reaches a first set range or a set value.

[0042] In an exemplary embodiment, it also includes:

[0043] In the case where the power module includes an outbound call power module configured to supply power to an outbound call board on each floor in the elevator system, the duty cycle of the pulse signal input to the outbound call power module is gradually increased from a reference duty cycle according to a second preset step size based on an output voltage value set for the outbound call power module until the voltage value output by the outbound call power module to the outbound call board reaches a second set range.

[0044] In an exemplary embodiment, it also includes:

[0045] When the power module includes a brake power module and receives a brake release instruction or a brake release signal sent by the main control chip, the brake power module is controlled to supply power to the connected brake coil.

[0046] In an exemplary embodiment, it also includes:

[0047] In the case where the power module includes a brake power module, the duty cycle of the pulse signal input to the brake power module when releasing the brake is determined according to the release voltage; the duty cycle of the pulse signal of the brake power module is maintained within a preset duration; when the preset duration is exceeded, the duty cycle of the pulse signal input to the brake power module is gradually increased until the voltage value output by the brake power module reaches a third set range.

[0048] The present application provides an elevator system, comprising:

[0049] An electrical device, a power board as described in any of the above embodiments.

[0050] The embodiments of the present application provide a power supply board, a power supply control method and an elevator system, by integrating a main circuit module, a power supply module and a logic control chip on a circuit board, and the main circuit module and the power supply module are respectively connected to the logic control chip, and the logic control chip controls the output of the power supply module. Since the circuit board is smaller in size and lighter in weight than a traditional transformer, the power supply board, the power supply control method and the elevator system can not only supply power to various electrical equipment of the elevator, but also have a small size, light weight, and can centrally control the power supply output of the elevator system.

[0051] Other features and advantages of the embodiments of the present application will be described in the subsequent description, and partly become apparent from the description, or understood by implementing the embodiments of the present application. The purpose and other advantages of the embodiments of the present application can be achieved and obtained through the structures specifically pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] The accompanying drawings are used to provide further understanding of the technical solution of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation on the technical solution of the present application.

[0053] Figure 1 A schematic diagram of a power board according to an embodiment of the present application;

[0054] Figure 2 A schematic diagram of a power module control method according to an embodiment of the present application;

[0055] Figure 3 A schematic diagram of a power supply control method according to an embodiment of the present application;

[0056] Figure 4 A schematic diagram of a two-stage release brake according to an embodiment of the present application;

[0057] Figure 5 A schematic diagram of an elevator system according to an embodiment of the present application. DETAILED DESCRIPTION

[0058] In order to make the purpose, technical solution and advantages of the present application more clear, the embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other arbitrarily without conflict.

[0059] Figure 1 Schematic diagram of a power board of an embodiment of the present application, the power board is applied to an elevator system, such as Figure 1As shown, the power board 100 includes a main circuit module 10, a power module 20 and a logic control chip 30;

[0060] The input end of the main circuit module 10 is connected to the power grid; the output end of the main circuit module 10 is connected to the power module 20; the main circuit module 10 is configured to provide a first DC voltage to the power module 20;

[0061] The power supply module 20 is connected to the logic control chip and the electrical equipment of the elevator system respectively, and is configured to convert the first DC voltage into a DC voltage under the control of the logic control chip and supply power to the electrical equipment;

[0062] The logic control chip is configured to control the power module to perform voltage conversion and voltage output.

[0063] The embodiment of the present application provides a power board 100, which integrates a main circuit module 10, a power module 20 and a logic control chip 30 on a circuit board, and the main circuit module 10 provides a first DC voltage to the power module 20, and the power module 20 supplies power to the electrical equipment of the elevator system under the control of the logic control chip 30. Since the circuit board is smaller and lighter than the traditional transformer, the power board, the power supply control method and the elevator system can not only supply power to the various electrical equipment of the elevator, but also have a small size, light weight, and can centrally control the power supply output of the elevator system.

[0064] Exemplarily, the voltage provided by the power grid may be an AC voltage of 220V.

[0065] The main circuit module 10 can rectify the AC voltage input from the power grid into a first DC voltage through the rectifier bridge of the module.

[0066] Exemplarily, the first DC voltage may be 310V.

[0067] The digital signal processor chip is a logic control chip, and the logic control chip 30 in the present application is a programmable chip.

[0068] In an exemplary embodiment, the power module includes at least one of the following: an outbound call power module, a control cabinet power module, a safety chain power module, and a brake power module; the electrical equipment of the elevator system correspondingly includes at least one of the following: an outbound call panel, a control cabinet, a safety switch on the safety chain, and a brake coil arranged on each floor of the elevator system;

[0069] The outbound call power supply module may be configured to supply power to the outbound call board;

[0070] The control cabinet power supply module may be configured to supply power to electrical equipment in the control cabinet;

[0071] The safety chain power supply module may be configured to supply power to the safety switch series circuit on the safety chain;

[0072] The brake power supply module may be configured to supply power to the brake coil.

[0073] Exemplarily, the electrical equipment in the control cabinet includes a main control chip and a driver chip.

[0074] In an exemplary embodiment, the outbound call power module, the control cabinet power module, the safety chain power module and the brake power module may include a DCDC chip. The outbound call board generally requires a 24V DC voltage, the electrical equipment in the control cabinet generally requires a 24V DC voltage, the safety chain switch series circuit generally requires a 48V DC voltage, and the brake coil generally requires a 110V DC voltage.

[0075] In an exemplary embodiment, the power board 100 further includes a temperature acquisition module connected to the logic control chip;

[0076] The temperature acquisition module is configured to acquire the temperature of the power board 100 and send the temperature to the logic control chip 30;

[0077] The logic control chip 30 is also configured to control the operation of a fan according to the received temperature; wherein the fan is used to cool the power board 100 .

[0078] In an exemplary embodiment, the power board 100 further includes:

[0079] A status indication module connected to the logic control chip 30;

[0080] The logic control chip 30 is also configured to collect and output a status signal of the power board 100;

[0081] The status indication module is configured to display the current status of the power board 100 according to the status signal output by the logic control chip 30 .

[0082] Exemplarily, the current state of the power board 100 may be displayed by an LED, as shown in Table 1.

[0083] Table 1 Power board status correspondence table

[0084]

[0085] In an exemplary embodiment, the power board 100 may further include:

[0086] A main control chip connected to the logic control chip 30;

[0087] The power module 20 may also be configured to sample the voltage and current output by the power module, convert the sampled voltage signal and current signal into a voltage sampling signal and a current sampling signal within a preset range, respectively, and send them to the logic control chip 30; output the DC voltage converted from the DC voltage to the electrical equipment of the elevator system when a start power supply signal is received; and stop supplying power to the electrical equipment of the elevator system when a stop power supply signal is received;

[0088] The logic control chip 30 may also be configured to receive the voltage sampling signal and the current sampling signal output by the power module 20, and send the power supply stop signal to the power module 20 and send fault information to the main control chip when detecting that a first preset number of consecutive voltage sampling signals exceeds a preset voltage threshold and / or a second preset number of consecutive current sampling signals exceeds a preset current threshold; and send the power supply start signal to the power module 20 when receiving a fault reset command issued by the main control chip;

[0089] The main control chip may be configured to receive fault information sent by the logic control chip 30 , and send a fault reset command to the logic control chip 30 after determining that the fault is recovered.

[0090] This example samples the voltage and current output by the power module in real time, and cuts off the output of the power module when the sampled voltage signal and the sampled current signal reach preset conditions, thereby avoiding overheating and fire caused by circuit short circuit.

[0091] The main control chip can determine that the fault has been restored through a manually input fault recovery instruction or determine that the fault has been restored after self-detection.

[0092] In an exemplary embodiment, the power board 100 may further include:

[0093] A memory connected to the logic control chip 30;

[0094] The logic control chip 30 may also be configured to send fault information to the memory when sending a power supply stop signal to the power module 20;

[0095] The memory may be configured to store the fault information sent by the logic control chip 30;

[0096] The logic control chip 30 may also be configured to determine whether the memory stores fault information after power-on, and send a power supply stop signal to the power module 20 if fault information is stored.

[0097] Exemplarily, the memory may be an EEPROM.

[0098] In an exemplary embodiment, the power board 100 may further include a communication module, and the logic control chip 30 exchanges information with the main control chip through the communication module.

[0099] Figure 2 Schematic diagram of a power module control method according to an embodiment of the present application. The power module control method is applied to the power module in the above-mentioned power board, such as Figure 2 As shown, the power module control method includes steps S11 to S13:

[0100] S11, receiving an enable signal and a power supply start signal sent by a logic control chip;

[0101] S12, when an enable signal is received, converting the first DC voltage output by the main circuit module into a second DC voltage;

[0102] S13: outputting the second DC voltage to the electrical equipment of the elevator system when a start power supply signal is received.

[0103] The power module control method of the embodiment of the present application converts the first DC voltage output by the main circuit module into a second DC voltage when an enable signal is received, and outputs the second DC voltage to the electrical equipment of the elevator system when a start power supply signal is received, so that the power module is controlled by a logic control chip, thereby making the power supply of the power module controllable and improving the safety of elevator operation.

[0104] The second DC voltage is the DC voltage obtained after the power module performs DC voltage conversion.

[0105] In an exemplary embodiment, the power module further samples the voltage signal and the current signal output by the power module, and converts the sampled voltage signal and the current signal into a voltage sampling signal and a current sampling signal within a preset range, respectively, and sends them to the logic control chip;

[0106] When a power supply stop signal sent by the logic control chip is received, power is not supplied to the electrical equipment of the elevator system.

[0107] For example, the sampling may be periodic sampling, so that the output of the power module can be better monitored. The sampling period may be set as required.

[0108] In an exemplary embodiment, when the power module is a safety chain power module, the method further includes sampling the terminal voltage of the safety chain, and sending the sampled terminal voltage signal to the logic control chip.

[0109] Figure 3Schematic diagram of a power supply control method according to an embodiment of the present application. The power supply control method is applied to the logic control chip of the power board, such as Figure 3 As shown, it includes steps S21 to S22:

[0110] S21, sending an enable signal and a power supply start signal to the power module after power-on;

[0111] S22, receiving the voltage sampling signal and the current sampling signal output by the power supply module, and sending a stop power supply signal to the power supply module when it is detected that a first preset number of consecutive voltage sampling signals exceeds a preset voltage threshold and / or a second preset number of consecutive current sampling signals exceeds a preset current threshold.

[0112] The power supply control method of the embodiment of the present application sends an enable signal and a power supply start signal to the power supply module after the logic control chip is powered on, receives the voltage sampling signal and the current sampling signal output by the power supply module, and sends a stop power supply signal to the power supply module when it is detected that a first preset number of consecutive voltage sampling signals exceeds a preset voltage threshold and / or a second preset number of consecutive current sampling signals exceeds a preset current threshold, so that the power supply module is controlled by the logic control chip, thereby making the power supply of the power supply module controllable and improving the safety of elevator operation.

[0113] The enable signal is used to instruct the power module to convert the first DC voltage output by the main circuit module into a second DC voltage; the start power supply signal is used to instruct the power module to output the second DC voltage to the electrical equipment of the elevator system; the stop power supply signal is used to instruct the power module to stop supplying power to the electrical equipment of the elevator system;

[0114] The voltage sampling signal and the current sampling signal are obtained in the following manner: the power module samples the voltage and current output by the power module, and converts the sampled voltage signal and current signal into a voltage sampling signal and a current sampling signal within a preset range, respectively.

[0115] The second DC voltage is the DC voltage obtained after the power module performs DC voltage conversion.

[0116] The logic control chip can be powered by an auxiliary power module. After the auxiliary power supply on the power board is powered on by AC input, it outputs the voltage (for example, +3.3V) required for the logic control chip to work.

[0117] When a power supply stop signal is sent to the power module, fault information is sent to the main control chip;

[0118] When receiving the fault reset command sent by the main control chip, a power supply start signal is sent to the power supply module.

[0119] In an exemplary embodiment, the method may further include:

[0120] When sending the fault information to the main control chip, the fault information is saved in the memory;

[0121] Deleting the fault information stored in the memory upon receiving a fault reset command issued by the main control chip;

[0122] After power-on, it is determined whether the memory stores the fault information of the power module, and if the fault information of the power module is stored, the power supply stop signal is sent to the power module.

[0123] This example can determine whether there is fault information in the memory when the logic control chip is powered on again after power failure, so as to avoid the elevator system running with faults due to directly sending a start-up power supply signal to the faulty power module when power is turned on, thereby further improving the safety of the elevator system.

[0124] In an exemplary embodiment, the method may further include:

[0125] The power supply module includes a safety chain power supply module configured to supply power to a safety switch series circuit on a safety chain in an elevator system, and when the terminal voltage signal obtained by sampling the terminal voltage of the safety chain is lower than a preset safety chain terminal voltage threshold, the power supply module gradually increases the duty cycle of the pulse signal input to the safety chain power supply module starting from a reference duty cycle according to a first preset step length until the terminal voltage signal of the safety chain reaches a first set range or a set value.

[0126] Exemplarily, the first setting range may be 47.8V to 48.5V, and the setting value may be 54V.

[0127] Since the safety chain is wired long in the elevator shaft and machine room, the voltage drop of the line is large. At the end of the safety chain, it must be used as the power supply for devices such as safety relays. When the lifting height is large or there are many configurations, the terminal voltage may be low. In order to ensure that the voltage at the end of the safety chain meets the working voltage of the components, the output voltage of the safety chain power supply must be compensated for the line voltage drop. Therefore, when the voltage at the end of the safety chain is lower than 47V, for example, the safety chain power supply module is adjusted to make the voltage at the end of the safety chain meet the requirements.

[0128] In an exemplary embodiment, the method may further include:

[0129] In the case where the power module includes an outbound call power module configured to supply power to an outbound call board on each floor in the elevator system, the duty cycle of the pulse signal input to the outbound call power module is gradually increased from a reference duty cycle according to a second preset step size based on an output voltage value set for the outbound call power module until the voltage value output by the outbound call power module to the outbound call board reaches a second set range.

[0130] Since the call boards are distributed in the elevator hall, the load is far away from the call power supply, so the line voltage drop is large. Exemplarily, the second setting range can be 24VDC to 27VDC. The adjustment signal can be a 1KHZ pulse width modulation (PWM) signal. When the voltage is adjusted, the duty cycle can be increased from 5% in steps of 0.5%.

[0131] In an exemplary embodiment, the method may further include:

[0132] When the power module includes a brake power module and receives a brake release instruction or a brake release signal sent by the main control chip, the brake power module is controlled to supply power to the connected brake coil.

[0133] In an exemplary embodiment, the method may further include:

[0134] In the case where the power module includes a brake power module, the duty cycle of the pulse signal input to the brake power module when releasing the brake is determined according to the release voltage; the duty cycle of the pulse signal of the brake power module is maintained within a preset duration; when the preset duration is exceeded, the duty cycle of the pulse signal input to the brake power module is increased until the voltage value output by the brake power module reaches a third set range.

[0135] In order to reduce brake loss and realize effective use and conservation of energy, the output voltage can be set in different time periods, such as Figure 4 As shown. The pulse width when releasing the brake is set according to the set release voltage value, and the release voltage is applied to the brake coil. After the preset duration is reached, the holding voltage is applied to the brake coil. Exemplarily, the third setting range can be 85VDC to 110VDC. The adjustment signal can be a 1KHZ pulse width modulation (PWM) signal, where the duty cycle is 0 when 110VDC is output, that is, the PWM output is stopped; increasing the PWM duty cycle can reduce the output of the brake power module.

[0136] Figure 5 is a schematic diagram of an elevator system according to an embodiment of the present application, such as Figure 5As shown, the power board, elevator host, control cabinet, call board for each floor, safety chain switch series circuit, fan, main control MCU (corresponding to the above main control chip), EEPROM (corresponding to the above memory). The power board includes DSP chip (corresponding to the above logic control chip), brake power module, call power module, control cabinet power module, safety chain power module, temperature acquisition module, LED module (corresponding to the above status indication module), and communication module.

[0137] The power grid supplies power to the main circuit module of the power board, and the main circuit module supplies power to the brake power module, the external call power module, the control cabinet power module, and the safety chain power module ( Figure 5 The brake power module of the power board supplies power to the elevator host (including the brake coil), the control cabinet power module supplies power to the control cabinet, the outbound call power module supplies power to the outbound call board of each floor, and the safety chain power module supplies power to the safety switch series circuit. The DSP chip is respectively connected to the brake power module, the outbound call power module, the control cabinet power module, the safety chain power module, the temperature acquisition module, the LED module, the communication module, the main control MCU, the EEPROM module, and the fan.

[0138] Among them, the port table of the DSP chip is shown in Table 2.

[0139] Table 2 DSP chip port table

[0140]

[0141]

[0142]

[0143] The interaction between the brake power module and the DSP chip is as follows:

[0144] The brake power supply module modulates the output voltage of the main circuit module through a forward switching power supply circuit to generate a stable 110V voltage. At the same time, the voltage and current values ​​output by the brake power supply module are converted into 0-3.3V sampling voltage signals and sampling current signals through a differential amplifier circuit and sent to the DSP chip.

[0145] Port 110V1_off and port 110V2_off are high-level signals by default. The DSP chip communicates with the main control MCU in real time. When the DSP chip receives the brake release command and the brake control port (Brk_ctrl_c) from the main control MCU at the same time as a high-level signal, it can control the port 110V1_off signal or the port 110V1_off signal to a low level, so that the brake power module outputs a 110V voltage to the brake control coil required by the brake release command.

[0146] Considering the brake coils that adapt to different voltages, and distinguishing between the release voltage and the holding voltage to reduce the brake loss and achieve effective use and conservation of energy, the release voltage, holding voltage and release voltage duration can be set, and the output voltage in different time periods can be set. The brake power supply module can reduce the output voltage by adjusting the pulse width of the port Brk_volt_adj. The default release voltage and holding voltage are both 110VDC. When the DSP chip is powered on, the settings of the release voltage, holding voltage and release voltage duration saved in the EEPROM module are read, including the pulse width of Brk_volt_adj when releasing the brake, where the signal frequency of the port Brk_volt_adj is 1KHz, and the voltage range can be set to 85VDC~110VDC. When outputting 110VDC, the duty cycle is 0, that is, the PWM output of the port Brk_volt_adj is stopped; increasing the PWM duty cycle of the port Brk_volt_adj can reduce the output of the brake voltage.

[0147] The DSP chip receives the sampled voltage signal and the sampled current signal in real time. When it detects that the sampled voltage signal is higher than 125VDC for 5 consecutive times, the port 110V_PS_en signal is set high to determine an overvoltage fault; when the sampled current signal is higher than 9A (sampling frequency to be determined) for 10 consecutive times, the port 110V_PS_en signal is set high to determine an overcurrent fault. The latched fault is sent to the main control MCU. A brake fault has occurred, and the brake fault (corresponding to the above fault information) must be stored in the EEPROM. It must not be automatically reset when it is powered on again after power failure. It can only be reset when a reset signal (corresponding to the above fault reset command) is received from the main control MCU.

[0148] The port 110V_off1 signal and the port 110V_off2 signal are high by default.

[0149] When the DSP chip receives the brake power fault reset command from the main control MCU, the 110V_PS_en signal of the recovery port is low. If an overvoltage fault or overcurrent fault occurs again, the corresponding fault and jump signal will be issued again.

[0150] The interaction between the outbound power module and the DSP chip is as follows:

[0151] The outbound call power supply module modulates the output voltage of the main loop module through a flyback switching power supply circuit to output a stable 24V voltage to power the outbound call board on each floor. At the same time, the voltage and current values ​​of the outbound call power supply are converted into 0-3.3V sampling voltage signals and sampling current signals through a differential amplifier circuit and sent to the DSP chip.

[0152] Because the outbound calls are distributed in the elevator hall, the load is far from the power supply, and the line voltage drop is large, the outbound call power supply needs to be able to adjust the output voltage according to the output voltage value set by the parameters. The adjustable range is 24VDC~27VDC, 24V1_volt_adj is a 1KHz PWM signal, and the duty cycle increases from 5% in 0.5% steps until the output voltage reaches 0.95~1.05 of the set value, and the upper limit of the duty cycle is 80%.

[0153] The DSP chip receives the sampled voltage signal and the sampled current signal in real time. When it is detected that the sampled voltage signal is higher than 32VDC for 5 consecutive times, the port 24V1_PS_en signal is set high to determine an overvoltage fault. When the sampled current signal is higher than 8A (sampling frequency to be determined) for 10 consecutive times, the port 24V1_PS_en signal is set high to determine an overcurrent fault.

[0154] The port 24V1_off signal is low by default. When an overvoltage fault or overcurrent fault is reported, the signal jumps high to cut off the external power supply output.

[0155] When the DSP chip receives an external power failure reset command from the main control MCU or is powered on again, the port 24V1_PS_en signal is restored to low and the port 24V1_off signal is restored to low. If an overvoltage fault or overcurrent fault occurs again, the corresponding fault and jump signal will be reported again.

[0156] The interaction between the control cabinet power module, brake power module and DSP chip is as follows:

[0157] The external power supply module modulates the output voltage of the main circuit module through the flyback switching power supply circuit to output a stable 24V voltage to power the electronic devices in the control cabinet. At the same time, the voltage and current values ​​of the control cabinet power supply are converted into 0-3.3V sampling voltage signals through the differential amplifier circuit and sent to the DSP chip.

[0158] The DSP chip receives the sampling voltage signal and the sampling current signal in real time. When it detects that the sampling voltage signal is higher than 32VDC for 5 consecutive times, the port 24V2_PS_en signal is set high and a software overvoltage fault is reported. When the sampling current signal is higher than 5A (sampling frequency to be determined) for 10 consecutive times, the port 24V2_PS_en signal is set high and a software overcurrent fault is reported.

[0159] The port 24V2_off signal is low by default. When an overvoltage fault or overcurrent fault is reported, the signal jumps high to cut off the external power supply output.

[0160] When the DSP chip receives the control cabinet power failure reset command from the main control MCU or is powered on again, the port 24V2_PS_en signal is restored to low and the port 24V2_off signal is restored to low. If the overvoltage or overcurrent fault occurs again, the corresponding fault and jump signal will be reported again.

[0161] The interaction between the safety chain power module and the DSP chip is as follows:

[0162] The safety chain power supply module modulates the output voltage of the main circuit module through a flyback switching power supply circuit to output a stable 48V voltage to power a series of safety switches connected in series in the safety circuit. At the same time, the voltage and current values ​​of the safety chain power supply are converted into 0-3.3V sampling voltage signals through a differential amplifier circuit and sent to the DSP chip.

[0163] Since the safety chain has long wiring in the elevator shaft and machine room, and the line voltage drop is large, the end of the safety chain must be used as the power supply for devices and components such as safety relays. When the lifting height is large or there are many configurations, the end voltage may be low. In order to ensure that the end voltage of the safety chain meets the working voltage of the components, the output voltage of the safety chain power supply must be compensated for the line voltage drop. When the end voltage of the safety chain (port 48V_end_vs) is lower than 47V, the adjustment can be started, and the end voltage of the safety chain (port 48V_end_vs) is adjusted to a range of 47.8VDC~48.5VDC. The signal of port 48V_volt_adj is a 1KHz PWM signal, and the duty cycle increases the PWM duty cycle from 5% in steps of 0.5%, until the end voltage of the safety chain reaches the set value range or the output voltage of the safety chain (port 48V_vs) reaches 54V.

[0164] The DSP chip receives the sampling voltage signal and the sampling current signal in real time. When it detects that the sampling voltage signal is higher than 62VDC for 5 consecutive times, the port 48V_PS_en is set high and a software overvoltage fault is reported. When the sampling current signal is higher than 1.5A (sampling frequency to be determined) for 10 consecutive times, the port 48V_PS_en is set high and a software overcurrent fault is reported. The fault is latched and communicated to the main control to report a safety chain fault, and the safety chain fault signal must be stored in the EEPROM. It must not be automatically reset after powering on again after power failure. It can only be reset when a safety chain power failure reset command is received from the main control MCU.

[0165] The port 48V_off signal is low by default. When an overvoltage or overcurrent fault occurs, the signal jumps high to cut off the safety chain power output.

[0166] When the DSP chip receives the safety chain power failure reset command from the main control MCU, it restores port 48V_PS_en to low and port 48V_off to low. If overvoltage or overcurrent fault occurs again, the corresponding fault and jump signal will be reported again.

[0167] The interaction between the temperature control module and the DSP chip is as follows:

[0168] The NTC resistor for sampling the internal temperature of the chassis is located on the power board. The temperature change in the cabinet will be reflected in the change of the NTC resistance value, which will be sent to the DSP chip for sampling through circuit conversion. The conversion formula of sampling voltage and resistance plus the corresponding NTC specification can obtain the temperature inside the chassis.

[0169] When the Fan_drive signal on the power board is low, the fan coil is powered on and rotates; otherwise, the fan coil loses power and stops.

[0170] The LED control module can be used as a power board status indicator, and the specific status can be shown in Table 1.

[0171] The EERPOM storage module can be used to store data that is not lost when power is off during software operation.

[0172] The communication module is used to realize the communication information interaction between the DSP chip and the main control MCU.

[0173] The present application also provides an elevator system, comprising:

[0174] An electrical device, a power board as described in any of the above embodiments.

[0175] The present application describes multiple embodiments, but the description is exemplary rather than restrictive, and it is obvious to those skilled in the art that there may be more embodiments and implementations within the scope of the embodiments described in the present application. Although many possible feature combinations are shown in the drawings and discussed in the specific embodiments, many other combinations of the disclosed features are also possible. Unless specifically limited, any feature or element of any embodiment may be used in combination with any other feature or element in any other embodiment, or may replace any other feature or element in any other embodiment.

[0176] The present application includes and contemplates combinations of features and elements known to those of ordinary skill in the art. The embodiments, features and elements disclosed in the present application may also be combined with any conventional features or elements to form a unique invention scheme. Any features or elements of any embodiment may also be combined with features or elements from other invention schemes to form another unique invention scheme. Therefore, it should be understood that any feature shown and / or discussed in the present application may be implemented individually or in any appropriate combination. Therefore, except for the limitations made according to the attached claims and their equivalents, the embodiments are not subject to other restrictions. In addition, various modifications and changes may be made within the scope of protection of the attached claims.

[0177] In addition, when describing representative embodiments, the specification may have presented the method and / or process as a specific sequence of steps. However, to the extent that the method or process does not rely on the specific order of the steps described herein, the method or process should not be limited to the steps of the specific order described. As will be understood by those of ordinary skill in the art, other sequences of steps are also possible. Therefore, the specific sequence of the steps set forth in the specification should not be interpreted as a limitation to the claims. In addition, the claims for the method and / or process should not be limited to the steps of performing them in the order written, and those skilled in the art can easily understand that these sequences can be changed and still remain within the spirit and scope of the embodiments of the present application.

[0178] It will be appreciated by those skilled in the art that all or some of the steps, systems, and functional modules / units in the methods disclosed above may be implemented as software, firmware, hardware, and appropriate combinations thereof. In hardware implementations, the division between the functional modules / units mentioned in the above description does not necessarily correspond to the division of physical components; for example, a physical component may have multiple functions, or a function or step may be performed by several physical components in cooperation. Some or all components may be implemented as software executed by a processor, such as a digital signal processor or a microprocessor, or implemented as hardware, or implemented as an integrated circuit, such as an application-specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or non-transitory medium) and a communication medium (or temporary medium). As known to those skilled in the art, the term "computer storage medium" includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store the desired information and can be accessed by a computer. In addition, it is well known to those of ordinary skill in the art that communication media typically contain computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0179] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include at least one of the features.

[0180] In the description of the present application, “plurality” means at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0181] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0182] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0183] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0184] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A power board, applied to an elevator system, characterized in that: include: Logic control chip, main circuit module and power module; The input end of the main circuit module is electrically connected to the power grid; the output end of the main circuit module is connected to the power module and is configured to provide a first DC voltage to the power module; The power supply module is connected to the logic control chip and the electrical equipment of the elevator system respectively, and is configured to convert the first DC voltage into a DC voltage under the control of the logic control chip and supply power to the electrical equipment; The logic control chip is configured to control the power module to perform voltage conversion and voltage output.

2. The power board according to claim 1, characterized in that: Also includes: A main control chip connected to the logic control chip; The power supply module is further configured to sample the output voltage and output current of the power supply module, and send the obtained voltage sampling signal and current sampling signal to the logic control chip; and, upon receiving the start power supply signal sent by the logic control chip, output the DC voltage obtained after the power supply module performs DC voltage conversion to the electrical equipment of the elevator system; and, upon receiving the stop power supply signal sent by the logic control chip, stop supplying power to the electrical equipment of the elevator system; The logic control chip is further configured to receive the voltage sampling signal and the current sampling signal output by the power supply module, and send the power supply stop signal to the power supply module and send fault information to the main control chip when detecting that a first preset number of consecutive voltage sampling signals exceeds a preset voltage threshold and / or a second preset number of consecutive current sampling signals exceeds a preset current threshold; and send the power supply start signal to the power supply module when receiving a fault reset command issued by the main control chip; The main control chip is configured to receive the fault information sent by the logic control chip, and after determining that the fault is recovered, send a fault reset command to the logic control chip.

3. The power board according to claim 2, characterized in that: Also includes: A memory connected to the logic control chip; The logic control chip is further configured to write fault information into the memory when sending a power supply stop signal to the power module; The memory is configured to store the fault information sent by the logic control chip; The logic control chip is further configured to determine whether the memory stores fault information of the power module after power-on, and send a power supply stop signal to the power module if the fault information of the power module is stored.

4. The power board according to claim 1, characterized in that: A temperature acquisition module connected to the logic control chip and a status indication module connected to the logic control chip; The temperature acquisition module is configured to acquire the temperature of the power board and send it to the logic control chip; The logic control chip is also configured to control the operation of a fan according to the received temperature; wherein the fan is used to cool the power board; The logic control chip is also configured to collect and output a status signal of the power board; The status indication module is configured to display the current status of the power board according to the status signal output by the logic control chip.

5. The power board according to claim 1, characterized in that: Also includes: The power module includes at least one of the following: an outbound call power module, a control cabinet power module, a safety chain power module and a brake power module; the electrical equipment of the elevator system includes at least one of the following: a safety switch, a brake coil and an outbound call board on each floor arranged in the control cabinet and the safety chain in the elevator system; The outbound call power supply module is configured to supply power to the outbound call board; The control cabinet power supply module is configured to supply power to the electrical equipment in the control cabinet; The safety chain power supply module is configured to supply power to the safety switch series circuit on the safety chain; The brake power supply module is configured to supply power to the brake coil.

6. A power supply control method, characterized in that: A logic control chip applied to a power board according to any one of claims 1 to 5, comprising: After power-on, an enable signal and a power supply start signal are sent to the power module; receiving a voltage sampling signal and a current sampling signal output by the power supply module, and sending a power supply stop signal to the power supply module when detecting that a first preset number of consecutive voltage sampling signals exceeds a preset voltage threshold and / or a second preset number of consecutive current sampling signals exceeds a preset current threshold; Among them, the enable signal is used to instruct the power supply module to convert the first DC voltage output by the main circuit module into a DC voltage; the start power supply signal is used to instruct the power supply module to output the DC voltage obtained after the DC voltage conversion by the power supply module to the electrical equipment of the elevator system; the stop power supply signal is used to instruct the power supply module to stop supplying power to the electrical equipment of the elevator system.

7. The power supply control method according to claim 6, characterized in that: Also includes: When a power supply stop signal is sent to the power module, fault information is sent to the main control chip; When receiving the fault reset command sent by the main control chip, a power supply start signal is sent to the power supply module.

8. The power supply control method according to claim 7, characterized in that: Also includes: When sending the fault information to the main control chip, the fault information is saved in the memory; Deleting the fault information stored in the memory upon receiving a fault reset command issued by the main control chip; After power-on, it is determined whether the memory stores the fault information of the power module, and if the fault information of the power module is stored, the power supply stop signal is sent to the power module.

9. The power supply control method according to claim 6, characterized in that: Also includes: The power supply module includes a safety chain power supply module configured to supply power to a safety switch series circuit on a safety chain in an elevator system, and when the terminal voltage signal obtained by sampling the terminal voltage of the safety chain is lower than a preset safety chain terminal voltage threshold, the power supply module gradually increases the duty cycle of the pulse signal input to the safety chain power supply module starting from a reference duty cycle according to a first preset step length until the terminal voltage signal reaches a first set range or a set value.

10. The power supply control method according to claim 6, characterized in that: Also includes: In the case where the power module includes an outbound call power module configured to supply power to an outbound call board on each floor in the elevator system, the duty cycle of the pulse signal input to the outbound call power module is increased from a reference duty cycle according to an output voltage value set for the outbound call power module at a second preset step size until the voltage value output by the outbound call power module to the outbound call board reaches a second set range.

11. A power supply control method as claimed in claim 6, characterized in that: Also includes: When the power module includes a brake power module and receives a brake release instruction or a brake release signal sent by the main control chip, the brake power module is controlled to supply power to the connected brake coil.

12. A power supply control method as claimed in claim 10, characterized in that: Also includes: In the case where the power module includes a brake power module, determining a duty cycle of a pulse signal input to the brake power module when the brake is released according to a release voltage; Maintaining the duty cycle of the pulse signal of the brake power module within a preset duration; When the preset duration is exceeded, the duty cycle of the pulse signal input to the brake power module is increased until the voltage value output by the brake power module reaches a third set range.

13. An elevator system, characterized in that: include: An electrical device, a power strip according to any one of claims 1 to 5.

Images