Energy-saving control devices, methods and systems

Abstract

This application relates to an energy-saving control device, method, and system. The energy-saving control device includes: a battery module; a magnetic latching switch module connected to the battery module for connecting to the DC bus of a frequency converter module and for connecting or disconnecting the path between the battery module and the frequency converter module; an energy management module connected to both the battery module and the magnetic latching switch module for connecting to the DC bus and for controlling the operating state of the magnetic latching switch module based on a first voltage signal from the battery module and a second voltage signal from the DC bus; and a wake-up detection module connected to the battery module, the magnetic latching switch module, and the energy management module for controlling the energy management module to be in a low-power state when the current in the path is less than a preset current threshold. This energy-saving control device can reduce energy waste.

Description

Technical Field

[0001] This application relates to the field of elevator technology, and in particular to an energy-saving control device, method and system. Background Technology

[0002] In related technologies, elevators are powered by mains electricity. When the mains power fails, the elevator cannot operate stably for an extended period, affecting daily work and life. At the same time, regenerative energy is generated when the elevator drives the main circuit.

[0003] The regenerative energy generated by elevators is currently processed by consuming resistors, resulting in significant energy waste. Summary of the Invention

[0004] Therefore, it is necessary to provide an energy-saving control device, method, and system that can reduce energy waste in response to the above-mentioned technical problems.

[0005] In a first aspect, this application provides an energy-saving control device, comprising:

[0006] Battery module;

[0007] A magnetic latching switch module is connected to the battery module for connecting the DC bus of the frequency converter module and for connecting or disconnecting the path between the battery module and the frequency converter module.

[0008] An energy management module is connected to the battery module and the magnetic latching switch module respectively, and is used to connect to the DC bus and control the working state of the magnetic latching switch module according to the first voltage signal of the battery module and the second voltage signal of the DC bus.

[0009] The wake-up detection module is connected to the battery module, the magnetic latching switch module and the energy management module respectively, and is used to control the energy management module to be in a low power consumption state when the current in the path is less than a preset current threshold.

[0010] In one embodiment, the wake-up detection module includes:

[0011] The current wake-up submodule is connected to the battery module, the magnetic latching switch module, and the energy management module, respectively. It is used to control the energy management module to be in a low-power state when the current in the path is less than a preset current threshold, and to control the energy management module to be in a working state when the current in the path is greater than or equal to the preset current threshold.

[0012] In one embodiment, the current wake-up submodule includes:

[0013] A discharge detection unit is connected to the battery module and the magnetic latching switch module respectively, and is used to output a first detection signal when there is a discharge current in the path;

[0014] A charging detection unit is connected to the battery module and the magnetic latching switch module respectively, and is used to output a second detection signal when there is a charging current in the path;

[0015] The first isolation output unit is connected to the discharge detection unit, the charging detection unit and the energy management module respectively, and is used to isolate the first detection signal and the second detection signal, and output a wake-up signal when the first detection signal or the second detection signal is received.

[0016] In one embodiment, the wake-up detection module is further configured to control the energy management module to operate when the battery module is in an abnormal state.

[0017] In one embodiment, the wake-up detection module includes:

[0018] A voltage wake-up submodule, connected to the battery module, is used to control the energy management module to operate when the first voltage signal of the battery module is in an abnormal state.

[0019] In one embodiment, the voltage wake-up submodule includes:

[0020] An overvoltage detection unit is connected to the battery module and is used to receive an overvoltage reference signal and to output a third detection signal when the first voltage signal is greater than the overvoltage reference signal.

[0021] An undervoltage detection unit is connected to the battery module and is used to receive an undervoltage reference signal and to output a fourth detection signal when the first voltage signal is less than the undervoltage reference signal.

[0022] The second isolation output unit is connected to the overvoltage detection unit, the undervoltage detection unit and the energy management module respectively, and is used to isolate the third detection signal and the fourth detection signal, and output a wake-up signal when the third detection signal or the fourth detection signal is received.

[0023] In one embodiment, the energy management module includes:

[0024] The monitoring and management submodule is connected to the battery module and the DC bus, and is used to monitor the abnormal state of the battery module and to output a drive signal when the first voltage signal and the second voltage signal meet preset conditions.

[0025] The magnetic latching drive submodule is connected to the monitoring and management submodule and the magnetic latching switch module, and is used to output a drive current according to the drive signal. The drive current is used to control the on / off state of the magnetic latching switch module.

[0026] In one embodiment, the drive signal includes a first drive signal and a second drive signal; the magnetic holding drive submodule includes:

[0027] A drive unit, connected to the monitoring and management submodule and the magnetic latching switch module, is used to output a drive current according to the first drive signal;

[0028] A current control unit, connected to the drive unit, is used to control the duration of the drive unit's output drive current according to the first drive signal and the second drive signal.

[0029] Secondly, this application also provides an energy-saving control method, applied to the energy-saving control device described in any of the above embodiments, the method comprising:

[0030] Detect the current in the path between the battery module and the inverter module;

[0031] When the current in the path is less than a preset current threshold, the energy management module is controlled to be in a low-power state.

[0032] Thirdly, this application provides an energy-saving control system, including a load, a frequency converter module connected to the load, and the energy-saving control device described in any of the above embodiments.

[0033] The aforementioned energy-saving control device and system include a battery module, a magnetic latching switch module, an energy management module, and a wake-up detection module. By connecting the battery module to the DC bus of the frequency converter module via the magnetic latching switch module, the regenerative energy generated by the frequency converter module can be recovered and stored in the battery module instead of being consumed through a resistor, thereby significantly improving energy utilization efficiency and achieving energy saving. Furthermore, by using the magnetic latching switch module to open or close the path between the battery module and the frequency converter module, the energy management module only needs to provide current at the moment the magnetic latching switch module switches, without needing to continuously power the magnetic latching switch module, further achieving energy saving. Moreover, by incorporating a wake-up detection module, this application places the energy management module in a low-power state when the path current is extremely low, thereby reducing the static power consumption of the entire energy-saving control device when it is not in operation, further achieving energy saving. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the energy-saving control system in one embodiment;

[0036] Figure 2 This is a schematic diagram of the energy-saving control system in another embodiment;

[0037] Figure 3 This is a circuit diagram of the current wake-up submodule in one embodiment;

[0038] Figure 4 The circuit structure diagram of the current wake-up submodule is shown in another embodiment;

[0039] Figure 5 This is a schematic diagram of the energy-saving control system in another embodiment;

[0040] Figure 6 This is a circuit diagram of a voltage wake-up submodule in one embodiment;

[0041] Figure 7 This is a schematic diagram of the energy-saving control system in another embodiment;

[0042] Figure 8 This is a circuit diagram of the magnetic latching drive submodule in one embodiment;

[0043] Figure 9 This is a flowchart illustrating an energy-saving control method in one embodiment.

[0044] Explanation of reference numerals in the attached drawings: 100-Energy-saving control device, 10-Battery module, 20-Magnetic latching switch module, 30-Energy management module, 31-Monitoring and management sub-module, 32-Magnetic latching drive sub-module, 321-Drive unit, 322-Current control unit, 40-Wake-up detection module, 41-Current wake-up sub-module, 411-Discharge detection unit, 412-Charging detection unit, 413-First isolation output unit, 42-Voltage wake-up sub-module, 421-Overvoltage detection unit, 422-Undervoltage detection unit, 423-Second isolation output unit, 200-Variable frequency module. Detailed Implementation

[0045] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application.

[0047] It is understood that the terms “first,” “second,” etc., used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another.

[0048] Spatial relation terms such as “below,” “under,” “below,” “under,” “above,” “above,” etc., are used herein to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, the element or feature described as “below,” “under,” or “below” will be oriented “above” the other element or feature. Therefore, the exemplary terms “below” and “under” can include both above and below orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein will be interpreted accordingly.

[0049] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediary element. Furthermore, in the following embodiments, "connection" should be understood as "electrical connection," "communication connection," etc., if there is transmission of electrical signals or data between the connected objects.

[0050] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising / including” or “having,” etc., specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. Meanwhile, the term “and / or” as used in this specification includes any and all combinations of the associated listed items.

[0051] In some exemplary embodiments, please refer to Figure 1 This application provides an energy-saving control device 100, comprising:

[0052] Battery module 10;

[0053] The magnetic latching switch module 20 is connected to the battery module 10 and is used for the DC bus connection of the frequency converter module 200, and for connecting or disconnecting the path between the battery module 10 and the frequency converter module 200.

[0054] The energy management module 30 is connected to the battery module 10 and the magnetic latching switch module 20 respectively. It is used to connect to the DC bus and to control the working state of the magnetic latching switch module 20 according to the first voltage signal of the battery module 10 and the second voltage signal of the DC bus.

[0055] The wake-up detection module 40 is connected to the battery module 10, the magnetic latching switch module 20 and the energy management module 30 respectively, and is used to control the energy management module 30 to be in a low power consumption state when the current in the path is less than a preset current threshold.

[0056] In this embodiment, the battery module 10 serves as the system's energy buffer. It can be a supercapacitor or a power battery to cope with the instantaneous high-power charging and discharging impact required when special equipment is working, thus avoiding impact on the power grid. Alternatively, it can be an energy battery pack, including but not limited to lithium batteries, sodium batteries, and storage batteries, to continuously replenish the power battery pack and special equipment or to continuously charge them in reverse, thereby meeting the continuous power consumption and regenerative energy recovery needs of special equipment.

[0057] The magnetic latching switch module 20 may include a magnetic latching relay, a novel type of relay that uses permanent magnets to maintain the contact state, belonging to automatic switching devices. Its structure includes a base, a magnetic circuit section, a push block, and a contact section. The base is divided into upper and lower cavities by a first baffle, with the magnetic circuit section and contact section respectively installed within them. The magnetic circuit section consists of an iron core, a yoke, and magnets forming an E-shaped magnetic conductive structure with a 90-degree side rotation. The armature is rotatably supported in the middle, with both ends corresponding to the top of the yoke, achieving a seesaw-like action. The push block connects the armature to the moving spring, completing the contact switching. Compared to ordinary relays, the magnetic latching relay has superior characteristics such as power saving, fast action, long life, small size, stable performance, and strong load-bearing capacity. In this application, by selecting a magnetic latching relay to control the on / off state of the current loop between the battery module 10 and the frequency converter module 200, it is not necessary for the energy management module 30 to continuously output control signals to the magnetic latching switch module 20. Instead, only a pulse current is needed when it is necessary to control the on / off state of the magnetic latching switch module 20, thus achieving control of the on / off state of the magnetic latching switch module 20.

[0058] This application avoids the problems of increased overall energy consumption and coil overheating caused by the continuous power supply required for traditional relay coils, which are also reduced by the heat generated by continuous current. This application only needs to provide current during the on / off state switching of the magnetically latching relay, reducing the relay's energy consumption. Furthermore, since a continuous current supply is not required, the overheating problem of the relay coil is effectively solved, thus improving the relay's lifespan.

[0059] The energy management module 30 is the core component of the entire system. When the energy management module 30 is in normal working condition, it can monitor parameters such as current, voltage, and temperature of the entire system to ensure system safety.

[0060] To further save energy, this application includes a wake-up detection module 40. When the current in the circuit is less than a preset current threshold, meaning the battery module 10 neither discharges externally nor receives charging from an external load, the energy management module 30 is controlled to enter a sleep state, i.e., a low-power state. Due to the characteristics of the magnetic latching relay, even when the energy management module 30 is in deep sleep, the circuit can still be kept closed, ensuring that the system can still charge or discharge the battery module 10 without monitoring. When current is generated in the circuit, and the current is greater than or equal to the preset current threshold, the wake-up detection module 40 generates a voltage wake-up signal, and the energy management system returns to normal operation, immediately monitoring system parameters such as voltage, temperature, and current to ensure system safety.

[0061] In applications, the wake-up detection module 40 can be a standalone module, or the wake-up detection module 40 can be integrated into the energy management module 30.

[0062] The aforementioned energy-saving control device 100 includes a battery module 10, a magnetic latching switch module 20, an energy management module 30, and a wake-up detection module 40. By connecting the battery module 10 to the DC bus of the frequency converter module 200 via the magnetic latching switch module 20, the regenerative energy generated by the frequency converter module 200 can be recovered and stored in the battery module 10 instead of being consumed through a resistor, thereby significantly improving energy utilization efficiency and achieving energy saving. Furthermore, by using the magnetic latching switch module 20 to open or close the path between the battery module 10 and the frequency converter module 200, the energy management module 30 only needs to provide current at the moment the magnetic latching switch module 20 switches, without continuously energizing the magnetic latching switch module 20, further achieving energy saving. Moreover, by setting up the wake-up detection module 40, when the path current is extremely low, the energy management module 30 is placed in a low-power state, thereby reducing the static power consumption of the entire energy-saving control device 100 when it is not working, further achieving energy saving.

[0063] In some exemplary embodiments, please refer to Figure 2 The wake-up detection module 40 includes:

[0064] The current wake-up submodule is connected to the battery module 10, the magnetic latching switch module 20 and the energy management module 30 respectively. It is used to control the energy management module 30 to be in a low-power state when the current in the path is less than a preset current threshold; and to control the energy management module 30 to be in a working state when the current in the path is greater than or equal to the preset current threshold.

[0065] When the current in the circuit is less than a preset current threshold, meaning the battery module 10 neither discharges externally nor receives charging from an external load, the energy management module 30 enters a sleep state, i.e., a low-power state. Due to the characteristics of the magnetic latching relay, even when the energy management module 30 is in deep sleep, the circuit can still be kept closed, ensuring that the system can still charge or discharge the battery module 10 without monitoring. When current is generated in the circuit, and the current is greater than or equal to the preset current threshold, the wake-up detection module 40 generates a voltage wake-up signal, and the energy management system resumes normal operation, immediately monitoring system parameters such as voltage, temperature, and current to ensure system safety.

[0066] In this embodiment, a bidirectional control logic is set for the current wake-up submodule. This not only allows the energy management module 30 to enter low-power mode when the current is low, but also wakes it up promptly when the current recovers to the operating threshold, restoring it to normal operation. This ensures that the system can dynamically adjust its power consumption according to actual energy flow requirements, balancing energy saving and timely response.

[0067] In some exemplary embodiments, please refer to Figure 3 or Figure 4 The current wake-up submodule includes:

[0068] The discharge detection unit 411 is connected to the battery module 10 and the magnetic latching switch module 20 respectively, and is used to output a first detection signal when there is a discharge current in the path;

[0069] The charging detection unit 412 is connected to the battery module 10 and the magnetic latching switch module 20 respectively, and is used to output a second detection signal when there is a charging current in the path;

[0070] The first isolation output unit 413 is connected to the discharge detection unit 411, the charging detection unit 412 and the energy management module 30 respectively. It is used to isolate the first detection signal and the second detection signal, and output a wake-up signal when the first detection signal or the second detection signal is received.

[0071] In one example, see Figure 3The charging detection unit 412 includes a first resistor R1, a first switch Q1, a second resistor R2, a third resistor R3, and a first operational amplifier IC1C. The first end of the first resistor R1 is connected to the first end of the battery module 10, and the second end of the first resistor R1 is connected to the first DC bus of the frequency converter module 200 via the magnetic latching switch module 20. The gate of the first switch Q1 is connected to the second end of the first resistor R1, the first terminal of the first switch Q1 is connected to the first end of the first resistor R1, the second terminal of the first switch Q1 receives the power signal VCC through the second resistor R2, and the second terminal of the first switch Q1 is also connected to the positive input terminal of the first operational amplifier IC1C through the third resistor R3. The negative input terminal of the first operational amplifier IC1C receives the reference voltage vref.

[0072] The discharge detection unit 411 includes a first resistor R1, a second switch Q2, a fourth resistor R4, a fifth resistor R5, and a second operational amplifier IC2C. The first terminal of the first resistor R1 is connected to the first terminal of the battery module 10, and the second terminal of the first resistor R1 is connected to the first DC bus of the frequency converter module 200 via the magnetic latching switch module 20. The gate of the second switch Q2 is connected to the first terminal of the first resistor R1, the first electrode of the second switch Q2 is connected to the second terminal of the first resistor R1, the second electrode of the second switch Q2 receives the power signal VCC through the fourth resistor R4, and the second electrode of the second switch Q2 is also connected to the positive input terminal of the second operational amplifier IC2C through the fifth resistor R5. The negative input terminal of the second operational amplifier IC2C receives the reference voltage vref.

[0073] The first isolation output unit 413 includes a first diode D1, a second diode D2, a sixth resistor R6, and a first capacitor C1. The cathode of the first diode D1 is connected to the output terminal of the first operational amplifier IC1C, and the cathode of the second diode D2 is connected to the output terminal of the second operational amplifier IC2C. The first terminal of the sixth resistor R6 is used to receive the power supply signal VCC, and the second terminal of the sixth resistor R6 is connected to the anodes of the first diode D1 and the second diode D2, respectively. The first terminal of the first capacitor C1 is grounded, and the second terminal of the first capacitor C1 is connected to the second terminal of the sixth resistor R6. The second terminal of the first capacitor C1 is the output terminal of the first isolation output unit 413, used to output the control signal Sig1.

[0074] When the circuit is static with no current or the current in the circuit is less than a preset current threshold, both the first switch Q1 and the second switch Q2 are not turned on. The first operational amplifier IC1C outputs a high-level detection signal S1, and the second operational amplifier IC2C outputs a high-level detection signal S2. Due to the unidirectional conductivity of the first diode D1 and the second diode D2, the first isolation output unit 413 outputs a high-level control signal Sig1, and the energy management module 30 enters sleep mode.

[0075] When charging current is present in the circuit, the current flows from the frequency converter module 200 to the battery module 10, a voltage drop is generated across the first resistor R1, V2 > V1, and the turn-on voltage of the first switch Q1 is V. GSth Therefore, the charging current that enables the first switch Q1 to conduct is at least I = V. GSth / R1 turns on the first switch Q1. After the first switch Q1 turns on, the voltage V1 at the positive input terminal of the first operational amplifier IC1C is less than the reference voltage vref at the negative input terminal. The output of the first operational amplifier IC1C is inverted, and the second detection signal (i.e., the low-level detection signal S1) is output. The first diode D1 turns on, and the first isolation output unit 413 outputs a wake-up signal (i.e., the low-level control signal Sig1).

[0076] Similarly, when there is a discharge current in the circuit, the current flows from the battery module 10 to the frequency converter module 200, and a voltage drop is generated across the first resistor R1, V1 > V2. The turn-on voltage of the second switch Q2 is V. GSth Therefore, the discharge current that enables the second switch Q2 to conduct is at least I = V. GSth / R1 turns on the second switch Q2. After the second switch Q2 turns on, the voltage V2 at the positive input terminal of the second operational amplifier IC2C is less than the reference voltage vref at the negative input terminal. The output of the second operational amplifier IC2C is inverted, and the first detection signal (i.e., the low-level detection signal S2) is output. The second diode D2 turns on, and the first isolation output unit 413 outputs a wake-up signal (i.e., the low-level control signal Sig1).

[0077] In another example, this application also provides a different circuit structure for a current-activated wake-up submodule. See [link to relevant documentation]. Figure 4The charging detection unit 412 includes a first resistor R1, a first switch Q1, a second resistor R2, a third resistor R3, and a first operational amplifier IC1C. The first terminal of the first resistor R1 is connected to the first terminal of the battery module 10. The second terminal of the second resistor R2 is connected to the first DC bus of the frequency converter module 200 via the magnetic latching switch module 20. The gate of the first switch Q1 is connected to the second terminal of the first resistor R1, and the first electrode of the first switch Q1 is connected to the first terminal of the first resistor R1. The second electrode of the first switch Q1 receives the power signal VCC through the second resistor R2. The second electrode of the first switch Q1 is also connected to the negative input terminal of the first operational amplifier IC1C through the third resistor R3. The positive input terminal of the first operational amplifier IC1C receives the reference voltage vref.

[0078] The discharge detection unit 411 includes a first resistor R1, a second switch Q2, a fourth resistor R4, a fifth resistor R5, and a second operational amplifier IC2C. The first terminal of the first resistor R1 is connected to the first terminal of the battery module 10. The second terminal of the second resistor R2 is connected to the first DC bus of the frequency converter module 200 via the magnetic latching switch module 20. The gate of the second switch Q2 is connected to the first terminal of the first resistor R1, the first electrode of the second switch Q2 is connected to the second terminal of the first resistor R1, the second electrode of the second switch Q2 receives the power signal VCC through the fourth resistor R4, and the second electrode of the second switch Q2 is also connected to the negative input terminal of the second operational amplifier IC2C through the fifth resistor R5. The positive input terminal of the second operational amplifier IC2C receives the reference voltage vref.

[0079] The first isolation output unit 413 includes a third diode D3, a fourth diode D4, a seventh resistor R7, a third switch Q3, an eighth resistor R8, a ninth resistor R9, and a second capacitor C2. The anode of the third diode D3 is connected to the output terminal of the first operational amplifier IC1C, and the anode of the fourth diode D4 is connected to the output terminal of the second operational amplifier IC2C. The gate of the third switch Q3 is connected to the cathode of the third diode D3, the cathode of the fourth diode D4, and the first terminal of the seventh resistor R7, with the second terminal of the seventh resistor R7 grounded. The first terminal of the third switch Q3 provides power to the eighth resistor R8 to receive the power signal VCC, and the second terminal of the third switch Q3 is grounded. The first terminal of the ninth resistor R9 is connected to the first terminal of the third switch Q3, and the second terminal of the ninth resistor R9 is connected to the first terminal of the second capacitor C2, with the second terminal of the second capacitor C2 grounded. The first terminal of the second capacitor C2 is the output terminal of the first isolation output unit 413, used to output the control signal Sig1.

[0080] When the circuit is in a static state with no current, neither the first switch Q1 nor the second switch Q2 is turned on. The input to the inverting input terminal of the op-amp is VCC > vref. Both the first operational amplifier IC1C and the second operational amplifier IC2C output a low-level detection signal. The third switch Q3 is not turned on, the control signal Sig1 is at a high level, and the energy management module 30 goes into sleep mode.

[0081] When charging current is present in the circuit, the current flows from the frequency converter module 200 to the battery module 10, a voltage drop is generated across the first resistor R1, V2 > V1, and the turn-on voltage of the first switch Q1 is V. GSth Therefore, the charging current that enables the first switch Q1 to conduct is at least I = V. GSth / R1 turns on the first switch Q1. After the first switch Q1 turns on, the voltage V1 at the negative input terminal of the first operational amplifier IC1C is less than the reference voltage vref at the positive input terminal. The output of the first operational amplifier IC1C is inverted, and the second detection signal (i.e., the high-level detection signal S1) is output. The third diode D3 turns on, and then the third switch Q3 turns on in response to the high-level second detection signal. The first isolation output unit 413 outputs a wake-up signal (i.e., the low-level control signal Sig1).

[0082] When a discharge current exists in the circuit, the current flows from the frequency converter module 200 to the battery module 10. A voltage drop occurs across the first resistor R1, V1 > V2, and the turn-on voltage of the second switch Q2 is V. GSth Therefore, the charging current that enables the second switch Q2 to conduct is at least I = V. GSth / R1 turns on the second switch Q2. After the second switch Q2 turns on, the voltage V2 at the negative input terminal of the second operational amplifier IC2C is less than the reference voltage vref at the positive input terminal. The output of the second operational amplifier IC2C is inverted, and the first detection signal (i.e., the high-level detection signal S2) is output. The fourth diode D4 turns on, and then the third switch Q3 turns on in response to the high-level first detection signal. The first isolation output unit 413 outputs a wake-up signal (i.e., the low-level control signal Sig1).

[0083] In this embodiment, a ninth resistor R9 and a second capacitor C2 are added as a filter circuit. The capacitor discharge time constant τ = R9 * C2. When the third switch Q3 is turned on, the voltage across capacitor C2 is VC = VCC * e. -t / τ However, when there is abnormal interference from glitches, the capacitor cannot discharge to the low level of the wake-up signal in a short time, and will not trigger the wake-up, thus avoiding erroneous wake-up caused by glitches in the circuit.

[0084] In some exemplary embodiments, the wake-up detection module 40 is also used to control the energy management module 30 to be in an operational state when the battery module 10 is in an abnormal state. Specifically, please refer to... Figure 5 The wake-up detection module 40 also includes:

[0085] The voltage wake-up submodule, connected to the battery module 10, is used to control the energy management module 30 to be in working state when the first voltage signal of the battery module 10 is in an abnormal state.

[0086] It is understandable that when the battery module 10 itself malfunctions, such as overvoltage or undervoltage, the voltage wake-up submodule can forcibly wake up the energy management module 30. This enables the energy management module 30 to handle battery malfunctions in a timely manner (such as alarms or battery recharging), increasing the system's safety protection functions.

[0087] In some exemplary embodiments, the voltage wake-up submodule includes:

[0088] The overvoltage detection unit 421 is connected to the battery module 10 and is used to receive the overvoltage reference signal and to output a third detection signal when the first voltage signal is greater than the overvoltage reference signal.

[0089] The undervoltage detection unit 422 is connected to the battery module 10 and is used to receive the undervoltage reference signal and to output a fourth detection signal when the first voltage signal is less than the undervoltage reference signal.

[0090] The second isolation output unit 423 is connected to the overvoltage detection unit 421, the undervoltage detection unit 422 and the energy management module 30 respectively. It is used to isolate the third detection signal and the fourth detection signal, and output a wake-up signal when the third detection signal or the fourth detection signal is received.

[0091] In one example, see Figure 6 The overvoltage detection unit 421 includes a tenth resistor R10, an eleventh resistor R11, and a third operational amplifier IC3C. The first terminal of the tenth resistor R10 is used to receive a first voltage signal V1, and the second terminal of the tenth resistor R10 is connected to the negative input terminal of the third operational amplifier IC3C. The first terminal of the eleventh resistor R11 is connected to the negative input terminal of the third operational amplifier IC3C, and the second terminal of the eleventh resistor R11 is grounded. The positive input terminal of the third operational amplifier IC3C is used to receive an overvoltage reference signal vref1.

[0092] The undervoltage detection unit 422 includes a twelfth resistor R12, a thirteenth resistor R13, and a fourth operational amplifier IC4C. The first terminal of the twelfth resistor R12 receives a first voltage signal V1, and the second terminal of the twelfth resistor R12 is connected to the positive input terminal of the fourth operational amplifier IC4C. The first terminal of the thirteenth resistor R13 is connected to the positive input terminal of the fourth operational amplifier IC4C, and the second terminal of the thirteenth resistor R13 is grounded. The negative input terminal of the fourth operational amplifier IC4C receives an undervoltage reference signal vref2.

[0093] The second isolation output unit 423 includes a fifth diode D5, a sixth diode D6, a fourteenth resistor R14, and a third capacitor C3. The cathode of the fifth diode D5 is connected to the output terminal of the third operational amplifier IC3C, and the cathode of the sixth diode D6 is connected to the output terminal of the fourth operational amplifier IC4C. The first terminal of the fourteenth resistor R14 is used to receive the power supply signal VCC, and the second terminal of the fourteenth resistor R14 is connected to the anodes of the fifth diode D5 and the sixth diode D6, respectively. The first terminal of the third capacitor C3 is grounded, and the second terminal of the third capacitor C3 is connected to the second terminal of the fourteenth resistor R14. The second terminal of the third capacitor C3 is the output terminal of the second isolation output unit 423, used to output the control signal Sig2.

[0094] In this example, the overvoltage reference signal vref1 is greater than the undervoltage reference signal vref2. The tenth resistor R10, the eleventh resistor R11, the twelfth resistor R12, and the thirteenth resistor R13 are voltage divider resistors.

[0095] When the voltage of battery module 10 is stable, the voltage at the negative input terminal of the third operational amplifier IC3C is less than the overvoltage reference signal vref1, and the third operational amplifier IC3C outputs a high-level detection signal S3. At the same time, the voltage at the positive input terminal of the fourth operational amplifier IC4C is greater than the undervoltage reference signal vref2, and the fourth operational amplifier IC4C outputs a high-level detection signal S4. The fifth diode D5 and the sixth diode D6 are both cut off, and the second isolation output unit 423 outputs a high-level control signal Sig2. The high-level control signal Sig2 is used to indicate that the energy management module 30 is in sleep mode.

[0096] When the battery module 10 is over-voltage, the voltage at the negative input terminal of the third operational amplifier IC3C is greater than the over-voltage reference signal vref1. The third operational amplifier IC3C outputs the third detection signal (i.e., the low-level detection signal S3), the fifth diode D5 is turned on, and the second isolation output unit 423 outputs the wake-up signal (i.e., the low-level control signal Sig2).

[0097] When the battery module 10 is undervoltage, the voltage at the positive input terminal of the fourth operational amplifier IC4C is less than the undervoltage reference signal vref2. The fourth operational amplifier IC4C outputs the fourth detection signal (i.e., the low-level detection signal S4), the sixth diode D6 is turned on, and the second isolation output unit 423 outputs the wake-up signal (i.e., the low-level control signal Sig2).

[0098] In this embodiment, by setting up an overvoltage detection unit 421 and an undervoltage detection unit 422, and comparing them with a reference signal respectively, it is possible to accurately determine whether the battery voltage exceeds the normal operating range, protect the battery from overcharging and over-discharging damage, and extend the battery life.

[0099] In some exemplary embodiments, please refer to Figure 7 The energy management module 30 includes:

[0100] The monitoring and management submodule 31 is connected to the battery module 10 and the DC bus. It is used to monitor the abnormal state of the battery module 10 and to output a drive signal when the first voltage signal and the second voltage signal meet preset conditions.

[0101] The magnetic latching drive submodule 32 is connected to the monitoring and management submodule 31 and the magnetic latching switch module 20. It is used to output a drive current according to the drive signal. The drive current is used to control the on / off state of the magnetic latching switch module 20.

[0102] In this embodiment, the monitoring and management submodule 31 can be used to monitor key parameters such as current, voltage, and temperature of the entire energy-saving control system, and decide when to turn on or off the magnetic latching switch module 20 based on the first voltage signal and the second voltage signal.

[0103] The magnetic latching drive submodule 32 is used to respond to the drive signal output by the monitoring and management submodule 31 and provide drive current to the magnetic latching switch module 20 so as to actually control the on and off state of the magnetic latching switch module 20.

[0104] In applications, the magnetic holding drive submodule 32 can be a standalone module or integrated with the monitoring and management submodule 31.

[0105] In some exemplary embodiments, the drive signal includes a first drive signal; the magnetic holding drive submodule 32 includes:

[0106] The drive unit 321 is connected to the monitoring and management submodule 31 and the magnetic latching switch module 20, and is used to output drive current according to the first drive signal.

[0107] The current control unit 322 is connected to the drive unit 321 and is used to control the duration of the drive unit 321 outputting the drive current according to the first drive signal and the second drive signal.

[0108] In one example, see Figure 8 The driving unit 321 of this application includes a fourth switch Q4, a fifth switch Q5, a sixth switch Q6, a seventh switch Q7, a first inverter U1A, and a second inverter U2A. For example... Figure 8 As shown, four switching transistors Q4 and Q5 form the first bridge arm, and six switching transistors Q6, Q7, the first inverter U1A, and the second inverter U2A form the second bridge arm. In application, the magnetic latching switch module 20 may include a magnetic latching relay, which may include an induction coil. The midpoint OUT1 of the first bridge arm can be connected to the first end of the induction coil, and the midpoint OUT2 of the second bridge arm can be connected to the second end of the induction coil. In one example, the magnetic latching relay is closed when the current in the induction coil flows from OUT1 to OUT2, and open when the current flows from OUT2 to OUT1. In another example, the magnetic latching relay is open when the current in the induction coil flows from OUT1 to OUT2, and closed when the current flows from OUT2 to OUT1.

[0109] The following explanation uses the example of fourth switch Q4 and sixth switch Q6 being P-type transistors, and fifth switch Q5 and seventh switch Q7 being N-type transistors.

[0110] When the first drive signal IN1 is low, the fourth switch Q4 turns on in response to the low-level first drive signal IN1, the fifth switch Q5 turns off in response to the low-level first drive signal IN1, the first inverter U1A and the second inverter U2A invert the low-level first drive signal IN1, and then the sixth switch Q6 turns off in response to the high-level first drive signal IN1 after being inverted by the first inverter U1A, and the seventh switch Q7 turns on in response to the high-level first drive signal IN1 after being inverted by the second inverter U2A. The current flow on the induction coil is from OUT1 to OUT2.

[0111] When the first drive signal IN1 is high, the fourth switch Q4 is turned off in response to the high-level first drive signal IN1, the fifth switch Q5 is turned on in response to the high-level first drive signal IN1, the first inverter U1A and the second inverter U2A invert the high-level first drive signal IN1, and then the sixth switch Q6 is turned on in response to the low-level first drive signal IN1 after being inverted by the first inverter U1A, and the seventh switch Q7 is turned off in response to the low-level first drive signal IN1 after being inverted by the second inverter U2A. The current flow on the induction coil is from OUT2 to OUT1.

[0112] Thus, by controlling the level of the first drive signal IN1, the on / off control of the magnetic latching relay can be achieved.

[0113] It is understood that the magnetic latching relay provides current momentarily during the switching of its on / off state, and does not require a continuous supply of current. Therefore, this application may also include a current control unit 322, which, after controlling the on / off state of the magnetic latching relay according to the first drive signal, cuts off the current supplied to the magnetic latching relay by the drive unit 321 to avoid energy waste.

[0114] In one example, please refer to [link / reference]. Figure 8 The current control unit 322 can reuse the fifth switch Q5, the seventh switch Q7, and the second inverter U2A in the drive unit 321. Additionally, the current control unit 322 also includes an eighth switch Q8 and a fifteenth resistor R15. The first terminal of the fifteenth resistor R15 receives the first drive signal IN1, and the second terminal of the fifteenth resistor R15 is connected to the gate of the fifth switch Q5. The gate of the eighth switch Q8 receives the second drive signal IN2. The first terminal of the eighth switch Q8 is connected to the gate of the fifth switch Q5, and the second terminal of the eighth switch Q8 is grounded.

[0115] In this example, we will use an N-type transistor as the eighth switch Q8. Specifically, when the magnetic latching relay is turned on or off, the second drive signal IN2 is low, thus turning off the eighth switch Q8. This does not affect the control of the fourth to seventh switches Q4 by the first drive signal IN1. After the magnetic latching relay is turned on or off, the second drive signal IN2 becomes high, turning on the eighth switch Q8. The gate of the fifth switch Q5 is grounded through the eighth switch Q8, and the fifth switch Q5 is turned off. At the same time, the first drive signal IN1 is high, thus turning off the seventh switch Q7. After both the fifth and seventh switches Q5 and Q7 are turned off, there will be no current flowing between OUT1 and OUT2, thereby cutting off the drive current.

[0116] It should be noted that the frequency converter module 200 may include at least one frequency converter. When the frequency converter module 200 includes multiple frequency converters, each frequency converter is connected to the positive terminal of the battery module 10 through a magnetic latching relay, and each magnetic latching relay corresponds to a magnetic latching drive submodule 32. The first drive signal received by each magnetic latching drive submodule 32 is a different signal, while the second drive signal received by at least some magnetic latching drive submodules 32 is the same signal.

[0117] Furthermore, the selection of the type of switching transistor in each example above in this application is merely illustrative. In practical applications, those skilled in the art can determine the type of switching transistor to be used according to actual needs, and this application does not impose any restrictions on this.

[0118] In some exemplary embodiments, this application provides an energy-saving control system, including a load, a frequency converter 200 connected to the load, and an energy-saving control device 100 as described in any of the above embodiments.

[0119] The load may include elevators, or loads with similar operating characteristics to elevators, such as elevators, oil pumps, etc., which can generate regenerative energy and recycle it while consuming electricity.

[0120] In one embodiment, this application also provides an energy-saving control method applied to the energy-saving control device 100 in any of the above embodiments. The method includes: detecting the current in the path between the battery module and the frequency converter module; and controlling the energy management module to be in a low-power state when the current in the path is less than a preset current threshold.

[0121] Specifically, please refer to Figure 9 Assuming the wake-up detection module has a power consumption of 40, The power consumption of the energy management module 30 is The power management module in deep sleep mode consumes power of: The magnetic latching relay only consumes power during operation, and its power consumption is negligible. The wake-up detection module consumes 40 kilowatts. Less than the power consumption of the energy management module 30 .

[0122] First, when the entire energy management module 30 is in normal condition, without any alarms or faults, when the current in the path... , The preset current threshold and duration The energy management module 30 will enter a deep sleep state, at which time the power consumption of the entire energy management module 30 will be [value missing]. .

[0123] Due to the characteristics of the magnetic latching relay, even when the energy management module 30 is in deep sleep mode, the circuit can still remain closed, ensuring that the energy-saving control system can still charge or discharge the battery module 10 even without monitoring. When current is generated in the circuit... At this time, the wake-up detection module 40 can generate a wake-up signal, and the energy management module 30 will resume normal operation, immediately monitoring the voltage, temperature and current parameters of the energy-saving control system to ensure system safety.

[0124] Considering the extremely weak current and the power consumption of the battery during long periods of inactivity, the wake-up detection module 40 has added the function of detecting low and high total voltage. When the total voltage of the battery module 10 is low or high, the wake-up detection module 40 can also generate a wake-up signal to wake up the energy management module 30, and perform alarm and power replenishment operations on the system.

[0125] Finally, assume the total system runtime is The hibernation time is The total system power consumption when not in sleep mode is... The total system power consumption after hibernation is... .

[0126] As can be seen, the energy-saving control method of this application can reduce energy waste. When the energy-saving control system is idle, the energy management module 30 can enter a sleep state, minimizing overall power consumption while still ensuring energy storage and release by the energy-saving control system. During circuit charging and discharging, the energy management module 30 can be woken up to monitor parameters such as voltage, temperature, and current of the energy-saving control system in real time, ensuring stable and reliable operation of the equipment throughout its entire lifespan.

[0127] In the description of this specification, references to terms such as "some embodiments," "other embodiments," and "ideal embodiments" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiments or examples.

[0128] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0129] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An energy-saving control device, characterized in that, include: Battery module; A magnetic latching switch module is connected to the battery module for connecting the DC bus of the frequency converter module and for connecting or disconnecting the path between the battery module and the frequency converter module. An energy management module is connected to the battery module and the magnetic latching switch module respectively, and is used to connect to the DC bus and control the working state of the magnetic latching switch module according to the first voltage signal of the battery module and the second voltage signal of the DC bus. The wake-up detection module is connected to the battery module, the magnetic latching switch module and the energy management module respectively, and is used to control the energy management module to be in a low power consumption state when the current in the path is less than a preset current threshold. The energy management module includes: The monitoring and management submodule is used to monitor the abnormal state of the battery module and to output a drive signal when the first voltage signal and the second voltage signal meet preset conditions. A magnetic latching drive submodule is used to output a drive current according to the drive signal, and the drive current is used to control the on / off state of the magnetic latching switch module; The driving signal includes a first driving signal and a second driving signal; the magnetic holding drive submodule includes: The driving unit is used to output a driving current according to the first driving signal; A current control unit is used to control the duration of the drive unit outputting drive current according to the first drive signal and the second drive signal; The drive unit includes a fourth switch, a fifth switch, a sixth switch, a seventh switch, a first inverter, and a second inverter. The fourth and fifth switches form the first bridge arm, and the sixth, seventh, first, and second inverters form the second bridge arm. The magnetic latching switch module includes a magnetic latching relay, which includes an induction coil. The midpoint of the first bridge arm is connected to the first end of the induction coil, and the midpoint of the second bridge arm is connected to the second end of the induction coil. The current control unit reuses the fifth switch, the seventh switch, and the second inverter in the drive unit. The current control unit also includes an eighth switch and a fifteenth resistor. The first terminal of the fifteenth resistor is used to receive the first drive signal, and the second terminal of the fifteenth resistor is connected to the gate of the fifth switch. The gate of the eighth switch is used to receive the second drive signal. The first terminal of the eighth switch is connected to the gate of the fifth switch, and the second terminal of the eighth switch is grounded.

2. The energy-saving control device according to claim 1, characterized in that, The wake-up detection module includes: The current wake-up submodule is connected to the battery module, the magnetic latching switch module, and the energy management module, respectively. It is used to control the energy management module to be in a low-power state when the current in the path is less than a preset current threshold, and to control the energy management module to be in a working state when the current in the path is greater than or equal to the preset current threshold.

3. The energy-saving control device according to claim 2, characterized in that, The current wake-up submodule includes: A discharge detection unit is connected to the battery module and the magnetic latching switch module respectively, and is used to output a first detection signal when there is a discharge current in the path; A charging detection unit is connected to the battery module and the magnetic latching switch module respectively, and is used to output a second detection signal when there is a charging current in the path; The first isolation output unit is connected to the discharge detection unit, the charge detection unit and the energy management module respectively, and is used to isolate the first detection signal and the second detection signal, and output a wake-up signal when the first detection signal or the second detection signal is received.

4. The energy-saving control device according to claim 1, characterized in that, The wake-up detection module is also used to control the energy management module to be in working state when the battery module is in an abnormal state.

5. The energy-saving control device according to claim 1, characterized in that, The wake-up detection module includes: A voltage wake-up submodule, connected to the battery module, is used to control the energy management module to operate when the first voltage signal of the battery module is in an abnormal state.

6. The energy-saving control device according to claim 5, characterized in that, The voltage wake-up submodule includes: An overvoltage detection unit is connected to the battery module and is used to receive an overvoltage reference signal and to output a third detection signal when the first voltage signal is greater than the overvoltage reference signal. An undervoltage detection unit is connected to the battery module and is used to receive an undervoltage reference signal and to output a fourth detection signal when the first voltage signal is less than the undervoltage reference signal. The second isolation output unit is connected to the overvoltage detection unit, the undervoltage detection unit and the energy management module respectively, and is used to isolate the third detection signal and the fourth detection signal, and output a wake-up signal when the third detection signal or the fourth detection signal is received.

7. The energy-saving control device according to claim 1, characterized in that, The monitoring and management submodule is connected to the battery module and the DC bus. The magnetic latching drive submodule is connected to the monitoring and management submodule and the magnetic latching switch module.

8. The energy-saving control device according to claim 7, characterized in that, The drive unit is connected to the monitoring and management submodule and the magnetic latching switch module; The current control unit is connected to the drive unit.

9. An energy-saving control method, characterized in that, Applied to the energy-saving control device according to any one of claims 1-8; the method includes: Detect the current in the path between the battery module and the inverter module; When the current in the path is less than a preset current threshold, the energy management module is controlled to be in a low-power state.

10. An energy-saving control system, comprising a load, a frequency converter connected to the load, and an energy-saving control device according to any one of claims 1-8.

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