Stabilizing circuit with adjustable output current
By designing a circuit including capacitors, voltage regulators, power resistors, adjustable resistors and transistors, the problems of instability and insufficient adaptability of the output current of the existing circuit are solved, and high-precision and widely adapted current output is achieved , simplifies circuit maintenance.
Patent Information
- Application Number
- CN202421000707.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-10
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-05-10
AI Technical Summary
When the load of the existing circuit is a current-driven lighting component, the output current is unstable, the adaptability range is small, the accuracy is low, and the maintenance is complicated.
Design an output current adjustable stabilization circuit including capacitors, three-terminal regulators, power resistors, adjustable resistors, relays, transistors and control modules. Constant current output is achieved through three-terminal regulators and adjustable resistors, and utilizes The transistor realizes current amplification to ensure the circuit operates stably under different loads.
It achieves the stability and accuracy of the output current, has a large adaptability range, simple circuit maintenance, and can adjust the output current within a certain range to meet different load needs.
Smart Images
Figure CN222283537U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of electrical appliances, and in particular relates to an output current adjustable and stable circuit. Background Art
[0002] When the load is a current-driven lighting component, a current output circuit needs to be designed to drive the lighting to work, and according to the customer's usage requirements, the circuit that provides the working current should be able to achieve a wide range of current output to adapt to the different lighting load usage requirements of customers. Since the secondary distribution power supply on the machine is 28VDC DC voltage, if the constant current lighting load requires a constant working current and the working current needs to be adjusted, a specific circuit needs to be designed to convert the voltage into the working current required by the load. Combined with engineering experience, the circuit generally designed requires multiple separate components to be built through a specific design. This type of circuit has the disadvantages of a single and unstable output current value, a small range of adaptability to products, low output current accuracy, and more troublesome circuit maintenance in the later stage. Summary of the invention
[0003] The purpose of the utility model is to overcome the above-mentioned shortcomings and provide a circuit for outputting a constant current, wherein the constant output current value can be selected within a certain range, so that most lighting loads can work stably, the product has a wide adaptability range, high output current accuracy, and an output current adjustable stable circuit with simple circuit maintenance.
[0004] The purpose of the utility model and the solution of its main technical problems are achieved by adopting the following technical solutions:
[0005] The utility model discloses an output current adjustable stabilizing circuit, comprising a capacitor, a three-terminal voltage regulator, a power resistor, an adjustable resistor, a relay, a triode and a control module, and is characterized in that the three-terminal voltage regulator is respectively connected to the capacitor, the power resistor and the adjustable resistor by wires, the power resistor is connected to the adjustable resistor relay by wires, the adjustable resistor relay is connected to the relay by wires, the relay is respectively connected to the triode, the control module and the load by wires, and the triode is connected to the capacitor and the load by wires.
[0006] The capacitor is a filter capacitor.
[0007] Compared with the prior art, the utility model has obvious beneficial effects; from the above technical scheme, it can be seen that: the capacitor, power resistor and adjustable resistor are connected with wires through the three-terminal voltage regulator, the power resistor is connected with the adjustable resistor with wires, the adjustable resistor is connected with the relay with wires, the relay is connected with the transistor, the control module and the load with wires, and the transistor is connected with the capacitor and the load with wires. The filter capacitor is designed at the input end of the circuit to make the power input smoother and more reliable. The whole current output circuit is based on the integrated circuit three-terminal voltage regulator. The three-terminal voltage regulator is generally connected in series in the circuit as a voltage source due to its voltage-stabilizing output characteristics. This circuit design utilizes the characteristics of the voltage at both ends of the output end and the regulating end of the three-terminal voltage regulator to maintain a stable output, and converts the three-terminal voltage regulator into a constant current source output by connecting resistors in series at both ends. The output terminal is connected to a high-performance and reliable power resistor to ensure the safety of the circuit; the adjustable resistor can realize adjustable output current, where the adjustable resistor resistance parameter can be calculated based on the fixed voltage difference between the output terminal and the adjustment terminal of the three-terminal regulator and the expected current value of the load, and a resistance value factory setting value is set; the circuit can switch the independent output of small current and large current through the external control module switching relay, and the specific adjustment of small current and large current can also be fine-tuned through the adjustable resistor. Among them, the transistor realizes current amplification to meet the large current use requirements of the load. If the transistor does not work, the circuit outputs a small current. It is used to output a constant current, and the output current can be adjusted. The constant output current value can be selected within a certain range, so that the lighting load can work stably. The product has a wide range of adaptability, high output current accuracy, and simple circuit maintenance in the later stage. BRIEF DESCRIPTION OF THE DRAWINGS
[0008] Figure 1 It is a structural schematic diagram of the utility model.
[0009] 1. Capacitor; 2. Three-terminal voltage regulator; 3. Power resistor; 4. Adjustable resistor; 5. Relay; 6. Transistor; 7. Control module; 8. Load. DETAILED DESCRIPTION
[0010] The specific implementation methods, structures, features and functions of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.
[0011] The utility model discloses an output current adjustable stabilizing circuit, comprising a capacitor 1, a three-terminal voltage regulator 2, a power resistor 3, an adjustable resistor 4, a relay 5, a transistor 6, a control module 7, and a load 8, and is characterized in that: the three-terminal voltage regulator 2 is respectively connected to the capacitor 1, the power resistor 3, and the adjustable resistor 4 by wires, the power resistor 3 is connected to the adjustable resistor 4 by wires, the adjustable resistor relay 4 is connected to the relay 5 by wires, the relay 5 is respectively connected to the transistor 6, the control module 7, and the load by wires, the transistor 6 is connected to the capacitor 1 and the load 8 by wires, and the capacitor 1 is a filter capacitor.
[0012] When in use, the power input passes through capacitor 1. A filter capacitor is designed at the input end of the circuit to make the power input smoother and more reliable. The smooth and reliable power then enters the three-terminal voltage regulator 2. The entire current output circuit is centered on the integrated circuit three-terminal voltage regulator 2. The three-terminal voltage regulator 2 is generally connected in series in the circuit as a voltage source due to its voltage-stabilizing output characteristics. This circuit design utilizes the characteristic that the voltage at both ends of the output and adjustment ends of the three-terminal voltage regulator 2 maintains a stable output. The three-terminal voltage regulator 2 is converted into a constant current source output by connecting a resistor 3 and an adjustable resistor 4 in series at both ends. The output end is connected to a high-performance reliable power resistor 3 to ensure circuit safety; the adjustable resistor in the adjustable resistor 4 can realize adjustable output current, wherein the resistance parameter of the adjustable resistor 4 can be calculated based on the fixed voltage difference between the output end and the adjustment end of the three-terminal regulator 2 and the expected current value of the load, and a resistance factory setting value is set; the circuit can switch the independent output of small current and large current through the external control module 7 switching relay, and the specific adjustment of small current and large current can also be fine-tuned through the adjustable resistor in the adjustable resistor 4, and then the current amplification output is realized through the transistor 6 to meet the large current use requirements of the load. When the transistor 6 is not working, the circuit outputs a small current through the load 8.
[0013] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the technical solution of the present invention still fall within the scope of the technical solution of the present invention.
Claims
1. An output current adjustable stabilization circuit, comprising a capacitor (1), a three-terminal voltage regulator (2), a power resistor (3), an adjustable resistor (4), a relay (5), a triode (6), and a control module (7), characterized in that; The three-terminal voltage regulator (2) is connected to the capacitor (1), the power resistor (3), and the adjustable resistor (4) respectively by wires. The power resistor (3) is connected to the adjustable resistor relay (4) by wires. The adjustable resistor (4) is connected to the relay (5) by wires. The relay (5) is connected to the transistor (6), the control module (7), and the load respectively by wires. The transistor (6) is connected to the capacitor (1) and the load (8) by wires.
2. The output current adjustable stabilization circuit according to claim 1, characterized in that: The capacitor (1) is a filter capacitor.