A solid state power controller

Abstract

A solid-state power controller, by setting up a power supply voltage acquisition module, a load voltage acquisition module, and a current detection module, and in conjunction with the analysis and judgment function of a signal processing module, can quickly output control commands when abnormal states such as overvoltage, overcurrent, or short circuit occur in the power supply and load. This drives the control switch module to cut off the output circuit in a timely manner, improving the system's protection capability and safety. Fault information from the power supply voltage acquisition module, load voltage acquisition module, and current detection module is simultaneously uploaded to the host computer, enabling rapid identification of the fault source.

Description

Technical Field

[0001] This utility model relates to the field of intelligent switching equipment, specifically to a solid-state power controller. Background Technology

[0002] Solid-state power controllers are widely used in industrial control, power systems and various electrical equipment to control the on / off state of the power supply to the load and monitor electrical parameters. Traditional power controllers mostly use mechanical relays or simple switching circuit structures. Although they can also realize the on / off state of the power supply, they cannot monitor the power supply voltage, load voltage and load current supplying the load in real time. They also lack protection functions to deal with abnormal states such as overvoltage, overcurrent and short circuit, which affects the reliability and safety of the circuit. Summary of the Invention

[0003] To address the shortcomings of existing technologies, such as the inability to monitor in real time and the lack of protection functions, this invention provides a solid-state power controller.

[0004] The technical solution of this utility model is: a solid-state power controller, including a signal processing module, a power supply voltage acquisition module, a load voltage acquisition module, a current acquisition module, a control switch module, and a power supply module;

[0005] The power supply voltage acquisition module is used to acquire the power supply voltage that supplies power to the load and output the sampled signal to the signal processing module;

[0006] The load voltage acquisition module is used to acquire the voltage across the load and output the sampled signal to the signal processing module;

[0007] The current acquisition module is used to detect the current in the load circuit and output the detection signal to the signal processing module;

[0008] The signal processing module is used to receive signals from the power supply voltage acquisition module, the load voltage acquisition module and the current acquisition module, make judgments based on the received signals, output control signals to the control switch module, send device status information to the host computer and receive control commands from the host computer.

[0009] The control switch module controls the on / off state of the output circuit according to the control signal output by the signal processing module;

[0010] The power supply modules provide power to the signal processing module, power voltage acquisition module, load voltage acquisition module, current acquisition module, and control switch module.

[0011] Preferably, the signal processing module includes a processor and a transceiver. The processor is used to receive signals from the power supply voltage acquisition module, the load voltage acquisition module, and the current acquisition module. The processor makes judgments based on the received input signals and outputs control signals to the control switch module. The processor sends device status information to the host computer and receives control commands from the host computer through the transceiver.

[0012] Preferably, the power supply voltage acquisition module includes a first voltage divider circuit, a first follower circuit, and a first filter circuit. The first voltage divider circuit acquires the voltage signal of the power supply, and the voltage signal is transmitted to the processor after being processed by the first follower circuit and the first filter circuit.

[0013] Preferably, the load voltage acquisition module includes a second voltage divider circuit, a second follower circuit, and a second filter circuit. The second voltage divider circuit acquires the voltage signal across the load terminals, and the voltage signal is transmitted to the processor after being processed by the second follower circuit and the second filter circuit.

[0014] Preferably, the current acquisition module includes a Hall sensor, a follower circuit, a filter circuit, and a comparator circuit. The Hall sensor acquires the current signal on the load, and the current signal is processed by the follower circuit and the filter circuit and then transmitted to the processor and the comparator circuit, respectively. The output of the comparator circuit is connected to the processor.

[0015] Preferably, the control switch module includes a transformer isolation drive circuit and a field-effect transistor (FET). The transformer isolation drive circuit provides a drive voltage to the gate of the FET according to the control signal output by the processor, and controls the on / off state of the output circuit through the FET.

[0016] Preferably, it also includes an ID module, through which the host computer modifies the address of the controller in the processor.

[0017] Preferably, the signal processing module is connected to several power supply voltage acquisition modules, several load voltage acquisition modules, several current acquisition modules and several control switch modules to form several control units, thereby realizing independent monitoring and control of multiple loads.

[0018] The beneficial effects of this utility model are as follows: By setting up a power supply voltage acquisition module, a load voltage acquisition module, and a current acquisition module, and combining them with the analysis and judgment function of the signal processing module, this utility model can quickly output control commands when abnormal states such as overvoltage, overcurrent, or short circuit occur in the power supply and load. This drives the control switch module to cut off the output circuit in time, improving the system's protection capability and safety. The fault information of the power supply voltage acquisition module, the load voltage acquisition module, and the current acquisition module is simultaneously uploaded to the host computer, which can quickly identify the source of the fault. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the control circuit of this utility model;

[0020] Figure 2 This is a schematic diagram of the external structure of this utility model;

[0021] Figure 3 This is the wiring diagram of the lead-out terminal of this utility model. Detailed Implementation

[0022] To better understand the concept of this utility model, the technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] The technical solution of this utility model is as follows: a solid-state power controller, such as... Figure 1 As shown, it includes a signal processing module, a power supply voltage acquisition module, a load voltage acquisition module, a current acquisition module, a control switch module, and a power supply module;

[0024] The power supply voltage acquisition module is used to acquire the power supply voltage that supplies power to the load and output the sampled signal to the signal processing module;

[0025] The load voltage acquisition module is used to acquire the voltage across the load and output the sampled signal to the signal processing module;

[0026] The current acquisition module is used to detect the current in the load circuit and output the detection signal to the signal processing module;

[0027] The signal processing module receives signals from the power supply voltage acquisition module, load voltage acquisition module, and current acquisition module. Based on the received signals, it makes judgments, outputs control signals to the control switch module, sends device status information to the host computer, and receives control commands from the host computer. In practical applications, abnormal load operation may not be entirely caused by the load itself, but may also be due to abnormal power supply voltage. Simply acquiring load voltage and current is insufficient to accurately determine whether the fault originates from the power supply or the load, easily leading to misjudgments. Therefore, the power supply voltage acquisition module acquires the supply voltage signal and sends it to the signal processing module. When the load voltage is abnormal while the power supply voltage is normal, the fault can be identified as a load fault. If the power supply voltage is abnormal while the load voltage fluctuates synchronously, the fault can be identified as a power supply fault. The fault information is simultaneously uploaded to the host computer, enabling rapid identification of the fault source.

[0028] The control switch module controls the on / off state of the output circuit based on the control signals output by the signal processing module;

[0029] The power supply modules provide power to the signal processing module, power voltage acquisition module, load voltage acquisition module, current acquisition module, and control switch module.

[0030] The signal processing module includes a processor and a transceiver. The processor receives signals from the power supply voltage acquisition module, load voltage acquisition module, and current acquisition module. Based on the received input signals, the processor makes judgments. When abnormal conditions such as overvoltage, overcurrent, or short circuit are detected, the processor outputs a control signal to the control switch module, which then cuts off the output power to prevent load damage. The processor sends device status information to the host computer via the transceiver and receives control commands from the host computer, enabling real-time reporting of device operating status and remote control command reception. The processor used is the STC32G12K128 processor from Shenzhen Guoxin Artificial Intelligence Co., Ltd. To improve controller compatibility, such as... Figure 1 As shown, this utility model provides two communication methods between the processor and the host computer. The first method is for the processor to communicate with the host computer via a CAN transceiver, and the second method is for the processor to communicate with the host computer via a 485 transceiver, thereby realizing the uploading of device status and the receiving of remote control commands.

[0031] The power supply voltage acquisition module includes a first voltage divider circuit, a first follower circuit, and a first filter circuit. The power supply voltage that supplies power to the load is divided proportionally by the first voltage divider circuit and then enters the first follower circuit. The first follower circuit ensures stable signal transmission. After the first filter circuit suppresses high-frequency noise, the processed voltage signal is transmitted to the processor. The processor calculates the actual power supply voltage value.

[0032] The load voltage acquisition module includes a second voltage divider circuit, a second follower circuit, and a second filter circuit. The voltage across the load is divided proportionally by the second voltage divider circuit and then enters the second follower circuit. The second follower circuit ensures stable signal transmission. After the second filter circuit suppresses high-frequency noise, the processed voltage signal is transmitted to the processor. The processor calculates the actual voltage value of the power supply.

[0033] The current acquisition module includes a Hall sensor, a follower circuit, a filter circuit, and a comparator circuit. The Hall sensor is used for non-contact detection of current signals in the load circuit. The output current signal is processed by the follower circuit and the filter circuit and then split into two paths. One path is input to the processor for numerical judgment. If the current exceeds the threshold and continues to exceed the inverse time protection range, the processor executes overcurrent protection and outputs a shutdown command to the control switch module. The other path is input to the comparator circuit to determine whether there is a short circuit based on the set current threshold. Once the current exceeds the threshold, the comparator immediately outputs a high level, and the processor immediately outputs a control signal to the control switch module to shut down the load circuit based on the comparator output signal.

[0034] The control switch module includes a transformer isolation drive circuit and a field-effect transistor. The processor outputs a control signal based on the monitoring results, which drives the field-effect transistor to turn on or off via the isolation drive circuit, thereby controlling the power supply of the output circuit to the load.

[0035] This invention also includes an ID module for address management. The ID module includes an ID enable pin and an isolation circuit. The isolation circuit is connected to a processor, which includes registers for modifying the controller's address. When the ID enable pin is low, the controller's address in the processor can be modified via a host computer and a communication bus. When the ID enable pin is floating, the internal circuit pulls it high, thus prohibiting address modification operations. Through this hardware mechanism, a unique address identifier can be set for each controller, ensuring that address conflicts are avoided when multiple controllers are networked together, and further realizing centralized management and remote configuration of multiple controllers.

[0036] To achieve independent monitoring and control of multiple loads, the signal processing module is connected to several power supply voltage acquisition modules, several load voltage acquisition modules, several current acquisition modules, and several control switch modules, forming several control units to achieve independent monitoring and control of multiple loads. Each power supply voltage acquisition module, one load voltage acquisition module, one current acquisition module, and one control switch module constitute a complete control unit, used for real-time detection and intelligent control of the power supply status of an independent load circuit. The signal processing module can manage multiple control units simultaneously, receive and process the sampling signals from each control unit, and output corresponding control commands to each control switch module, thereby realizing independent on / off control, overvoltage and overcurrent protection, and operational status monitoring of multiple loads.

[0037] like Figure 2 As shown, this controller is encapsulated by a cover plate 1, a frame 2, a wiring board 3, and a base 4. Figure 3 As shown, pins 1 and 2 on connector 3 are the bias terminal and input ground of the power module, pin 3 is the ID enable terminal of the ID module, pins 4 and 5 are the wiring terminals of the CAN transceiver, and pins 6 and 7 are the wiring terminals of the 485 transceiver. Figure 3 This is the wiring diagram for the four-channel load detection of this utility model. Lead-out 8 is the common ground PGND, lead-out 13 is the positive output OUT+ of the first group, lead-out 9 is the negative output OUT- of the first group, lead-out 14 is the positive output OUT+ of the second group, lead-out 10 is the negative output OUT- of the second group, lead-out 15 is the positive output OUT+ of the third group, lead-out 11 is the negative output OUT- of the third group, lead-out 16 is the positive output OUT+ of the fourth group, and lead-out 12 is the negative output OUT- of the fourth group. The first voltage divider circuit of the power supply voltage acquisition module and the field-effect transistor of the control switch module of each group are connected to the positive output OUT+, and the second voltage divider circuit of the load voltage acquisition module and the Hall sensor of the current acquisition module of each group are connected to the negative output OUT-.

[0038] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model are included within the scope of protection of this utility model.

Claims

1. A solid state power controller, characterized by: It includes a signal processing module, a power supply voltage acquisition module, a load voltage acquisition module, a current acquisition module, a control switch module, and a power supply module; The power supply voltage acquisition module is used to acquire the power supply voltage that supplies power to the load and output the sampled signal to the signal processing module; The load voltage acquisition module is used to acquire the voltage across the load and output the sampled signal to the signal processing module; The current acquisition module is used to detect the current in the load circuit and output the detection signal to the signal processing module; The signal processing module is used to receive signals from the power supply voltage acquisition module, the load voltage acquisition module and the current acquisition module, make judgments based on the received signals, output control signals to the control switch module, send device status information to the host computer and receive control commands from the host computer. The control switch module controls the on / off state of the output circuit according to the control signal output by the signal processing module; The power supply modules provide power to the signal processing module, power voltage acquisition module, load voltage acquisition module, current acquisition module, and control switch module.

2. A solid state power controller according to claim 1, wherein: The signal processing module includes a processor and a transceiver. The processor is used to receive signals from the power supply voltage acquisition module, the load voltage acquisition module, and the current acquisition module. The processor makes judgments based on the received input signals and outputs control signals to the control switch module. The processor sends device status information to the host computer and receives control commands from the host computer through the transceiver.

3. A solid state power controller according to claim 2, wherein: The power supply voltage acquisition module includes a first voltage divider circuit, a first follower circuit, and a first filter circuit. The first voltage divider circuit acquires the voltage signal of the power supply, and the voltage signal is transmitted to the processor after being processed by the first follower circuit and the first filter circuit.

4. A solid state power controller according to claim 2, wherein: The load voltage acquisition module includes a second voltage divider circuit, a second follower circuit, and a second filter circuit. The second voltage divider circuit acquires the voltage signal across the load terminals, and the voltage signal is transmitted to the processor after being processed by the second follower circuit and the second filter circuit.

5. A solid state power controller according to claim 2, wherein: The current acquisition module includes a Hall sensor, a follower circuit, a filter circuit, and a comparator circuit. The Hall sensor acquires the current signal on the load, and the current signal is processed by the follower circuit and the filter circuit and then transmitted to the processor and the comparator circuit, respectively. The output of the comparator circuit is connected to the processor.

6. A solid state power controller according to claim 2, wherein: The control switch module includes a transformer isolation drive circuit and a field-effect transistor. The transformer isolation drive circuit provides a drive voltage to the gate of the field-effect transistor according to the control signal output by the processor, and controls the on / off state of the output circuit through the field-effect transistor.

7. A solid state power controller according to claim 1, wherein: It also includes an ID module, through which the host computer modifies the address of the controller in the processor.

8. A solid state power controller according to any one of claims 1-6, characterized in that: The signal processing module is connected to several power supply voltage acquisition modules, several load voltage acquisition modules, several current acquisition modules and several control switch modules to form several control units, realizing independent monitoring and control of multiple loads.

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