Quick switching dual-power switch device and control method thereof

Abstract

The invention provides a rapid switching dual-power switch device and a control method thereof, and the device is characterized in that the device comprises a main power input module, a standby power input module, a rapid switching module, a control module, a monitoring module, and an output module; the main power supply input module, the rapid switching module and the output module are connected in sequence; the main power supply input module and the standby power supply module are connected with a monitoring module; the rapid switching module is connected with the control module; the output module is connected with a load and used for outputting electric energy. Millisecond-level power supply switching is achieved through the solid-state relay and the power semiconductor device, and the system has the advantages of being high in switching speed, reliability and intellectualization and is suitable for a high-reliability power supply field.

Description

Technical Field

[0001] The present invention belongs to the technical field of power electronics, and particularly relates to a fast-switching dual-power supply switch device and its control method, which is applicable to occasions where a fast power supply switch is required. Background Art

[0002] In the power system, a dual-power supply switching device is used to quickly switch to a standby power supply when the main power supply fails to ensure power supply continuity. The existing dual-power supply switching devices have the following problems:

[0003] 1. Slow switching speed: The switching time of traditional mechanical switches is relatively long, which may cause equipment power outage.

[0004] 2. Low reliability: Mechanical contacts are easily worn, affecting the device life.

[0005] 3. Lack of intelligence: Lack of real-time monitoring and automatic control functions, unable to adapt to complex power environments. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide a fast-switching dual-power supply switch and its control method to solve the problems of slow switching speed, low reliability, and lack of intelligence in the existing technology, and to achieve fast, reliable, and intelligent dual-power supply switching.

[0007] In a first aspect, an embodiment of the present invention provides a fast-switching dual-power supply switch device, including a main power input module, a standby power input module, a fast-switching module, a control module, a monitoring module, and an output module;

[0008] The main power input module, the fast-switching module, and the output module are connected in sequence; the main power input module and the standby power module are connected to the monitoring module; the fast-switching module is connected to the control module; the output module is connected to a load for outputting electric energy;

[0009] Among them, the fast-switching module includes a solid-state relay SSR and a power semiconductor device for achieving millisecond-level power supply switching;

[0010] The control module includes a microcontroller MCU and a signal processing circuit for real-time monitoring of the power supply status and controlling the switching operation;

[0011] The monitoring module includes a voltage sensor, a current sensor, and a frequency sensor for real-time monitoring of the status of the main power supply and the standby power supply;

[0012] The fast-switching module includes a solid-state relay and a power semiconductor device.

[0013] Preferably, it further includes a power supply module, which includes a main power supply and a backup power supply. The main power supply input module is connected to the main power supply and is used to receive the electric energy of the main power supply; the backup power supply input module is connected to the backup power supply and is used to receive the electric energy of the backup power supply.

[0014] Preferably, the control module is externally connected to a display module, and the display module is used to display the power supply status information outside the display.

[0015] In a second aspect, a control method for a fast-switching dual-power switch device includes:

[0016] S1. Real-time collect parameters such as voltage, current, and frequency of the main power supply and the backup power supply through a voltage sensor, a current sensor, and a frequency sensor;

[0017] S2. Based on the collected parameters, judge whether the parameters of the main power supply are normal. If so, continue to supply power with the main power supply; if not, the main power supply fails, trigger the fast-switching module, and switch to the backup power supply;

[0018] S3. The load is switched from the main power supply to the backup power supply, and the recovery status of the main power supply is monitored in real time. When the main power supply returns to normal, the load is automatically switched back from the backup power supply to the main power supply.

[0019] The embodiments of the present invention bring the following beneficial effects:

[0020] The present invention realizes millisecond-level power supply switching through solid-state relays and power semiconductor devices, and has the advantages of fast switching speed, high reliability, and strong intelligence, and is suitable for high-reliability power supply occasions. Specifically: fast switching speed, using solid-state relays and power semiconductor devices, the switching time is less than 20ms. High reliability: no mechanical contacts, long service life, and high reliability. Intelligence: real-time monitor the power supply status, automatic switching and recovery. Wide application range: suitable for high-reliability power supply occasions such as data centers, hospitals, and factories.

[0021] Other features and advantages of the present invention will be described in the subsequent specification, and some features will become obvious from the specification, or be understood by implementing the present invention. The objectives and other advantages of the present invention are achieved and obtained by the structures specifically pointed out in the specification, the claims, and the drawings.

[0022] To make the above objectives, features, and advantages of the present invention more obvious and understandable, the following specific preferred embodiments are given, and in conjunction with the accompanying drawings, the detailed description is as follows. Description of the Drawings

[0023] Figure 1 It is a schematic diagram of the overall structure of the device according to the embodiment of the present invention;

[0024] Figure 2Circuit diagram of the fast switching module according to an embodiment of the present invention;

[0025] Figure 3 Flowchart of the control method according to an embodiment of the present invention. Detailed implementation manners

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0027] Based on this, a fast-switching dual-power switch device provided by an embodiment of the present invention, as Figure 1 shown, includes a main power input module, a standby power input module, a fast switching module, a control module, a monitoring module, an output module, and a power module. The main power input module, the fast switching module, and the output module are connected in sequence; the main power input module and the standby power module are connected to the monitoring module; the fast switching module is connected to the control module; the output module is connected to the load and is used to output electric energy.

[0028] Among them, the power module includes a main power supply and a standby power supply. The main power input module is connected to the main power supply and is used to receive the electric energy of the main power supply; the standby power input module is connected to the standby power supply and is used to receive the electric energy of the standby power supply. The fast switching module includes a solid-state relay SSR and a power semiconductor device, and is used to realize power switching at the millisecond level and ensure that the switching time is less than 20 ms. The control module includes a microcontroller MCU and a signal processing circuit, and is used to monitor the power state in real time and control the switching operation. The monitoring module includes a voltage sensor, a current sensor, and a frequency sensor, and is used to monitor the states of the main power supply and the standby power supply in real time.

[0029] Furthermore, an independent display module is externally connected to the control module, which can be a display screen. The display module is not directly integrated on the control module, but is connected to the control module through an interface such as a serial port, a parallel port, I2C, SPI, etc., and is used to display the power state information outside the controller.

[0030] As Figure 2 shown, the solid-state relay SSR is respectively connected to the power semiconductor device and the output interface, and the power semiconductor device is respectively connected to the protection circuit and the output interface.

[0031] Among them, the protection circuit ensures the safe and stable operation of the solid-state relay and the load device by monitoring the working state of the circuit in real time and taking protection measures in case of abnormalities. The solid-state relay usually has two output interfaces. The control signal is transmitted to the load device through the main output interface to control the on / off state of the load device, and between the main output interface and the load device, the current and voltage required for operation can be transmitted to ensure the normal operation of the load device; the auxiliary output interface is used to provide feedback on the working state of the relay, such as whether it is in the conducting state, etc., and is also used to implement specific control functions, such as linkage control with other devices, etc.

[0032] Embodiment 2, a control method for a fast-switching dual-power switch device, as Figure 3 shown, the steps are as follows:

[0033] S1. Real-time collect parameters such as voltage, current, and frequency of the main power supply and the standby power supply through voltage sensors, current sensors, and frequency sensors;

[0034] S2. Based on the collected parameters, judge whether the main power supply parameters are normal. If so, continue to supply power from the main power supply; if not, the main power supply fails, trigger the fast-switching module, and switch to the standby power supply;

[0035] Among them, the main power supply fault states include voltage dips, frequency deviations, etc. In the main power supply fault state, the control module triggers the fast-switching module to switch the load from the main power supply to the standby power supply, and the switching time is less than 20 ms.

[0036] Specifically, when the main power supply fails, for example, when a certain phase of the ABC power supply has overvoltage / undervoltage of 20% or phase break, etc., the power quality monitoring circuit detects an abnormal signal and sends the abnormal signal to the control system. After receiving the abnormal signal, the control system judges whether to switch the power supply according to the preset logic. If necessary, trigger the fast-switching module to perform power supply switching. For example, a threshold can be set, and when the voltage deviation exceeds ±20% or a phase break is detected, trigger the power supply switching.

[0037] After the fast-switching power supply module is triggered, the control system sends a control signal to the solid-state relay SSR. After receiving the control signal, the solid-state relay SSR cuts off the connection between the main power supply and the load, and at the same time connects the standby power supply and the load, completing the switching process.

[0038] S3. The load is switched from the main power supply to the standby power supply, monitor the recovery state of the main power supply, and when the main power supply returns to normal, automatically switch the load back from the standby power supply to the main power supply.

[0039] It should be noted that, in this article, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0040] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fast switching dual power switch device, characterized in that: Including main power input module, backup power input module, fast switching module, control module, monitoring module, output module; The main power input module, the fast switching module, and the output module are connected in sequence; the main power input module and the backup power module are connected to the monitoring module respectively; the fast switching module is connected to the control module; the output module is connected to the load for outputting electric energy; Wherein, the fast switching module includes a solid-state relay SSR and a power semiconductor device, which is used to achieve millisecond-level power switching; The control module includes a microcontroller MCU and a signal processing circuit, which are used to monitor the power supply status in real time and control the switching operation; The monitoring module includes a voltage sensor, a current sensor and a frequency sensor, which are used to monitor the status of the main power supply and the backup power supply in real time.

2. The fast switching dual power switch device according to claim 1, characterized in that: Also includes power module, The power supply module includes a main power supply and a backup power supply. The main power supply input module is connected to the main power supply and is used to receive the main power supply power; the backup power supply input module is connected to the backup power supply and is used to receive the backup power supply power.

3. The fast switching dual power switch device according to claim 1, characterized in that: The control module is externally connected to a display module, and the display module is used to display power status information outside the display.

4. A control method based on the fast switching dual power switch device according to claim 1, characterized in that: The following steps are included: S1, collect the voltage, current, frequency and other parameters of the main power supply and backup power supply in real time through voltage sensors, current sensors and frequency sensors; S2. Based on the collected parameters, determine whether the main power supply parameters are normal. If so, continue to maintain the main power supply; if not, the main power supply fails, triggering the fast switching module to switch to the backup power supply; S3: The load is switched from the main power supply to the backup power supply, and the recovery status of the main power supply is monitored in real time. When the main power supply returns to normal, the load is automatically switched from the backup power supply back to the main power supply.

5. The control method according to claim 4, characterized in that: The main power failure in S2 triggers the fast switching module to switch to the backup power supply, specifically including: When the main power supply fails, the power quality monitoring circuit detects an abnormal signal and sends the abnormal signal to the control system. After receiving the abnormal signal, the control system determines whether the power supply needs to be switched according to the preset logic. If necessary, the fast switching module is triggered to switch the power supply.

6. The control method according to claim 5, characterized in that: It also includes that after the fast switching power supply module is triggered, the control system sends a control signal to the solid-state relay SSR, and after receiving the control signal, the solid-state relay SSR cuts off the connection between the main power supply and the load, and simultaneously connects the connection between the backup power supply and the load, completing the switching process.

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