A reliable diesel generator PLC power supply structure
Patent Information
- Application Number
- CN202521806594.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-25
- Publication Date
- 2026-09-04
- Estimated Expiration
- 2035-08-25
AI Technical Summary
然而，启动电机工作瞬间产生近千安电流，会急剧拉低蓄电池电压，引起PLC电源电压不足，PLC无法正常工作，导致柴油发电机启动失败
由于本实用新型的可靠的柴油发电机PLC电源供电结构的电能输出线与供电模块的输入端相连，供电模块的输出端与所述柴油发电机PLC相连，供电模块用于将外部电源的电能电压转换成柴油发电机PLC的工作电压，为柴油发电机PLC提供电能。需要柴油发电机启动时，蓄电池为启动电机提供电能，启动电机转动进而带动柴油发电机转动，直至柴油机转速达到能够点燃柴油维持运转后，启动电机退出，柴油发电机PLC采用外部电源供电。这种供电结构柴油发电机PLC无需从供电蓄电池取电，因而不会出现启动初期，因供电蓄电池电压下降、柴油发电机PLC无法正常运行，进而导致启动失败的情况，大大提高了启动的稳定性。
Smart Images
Figure CN224721634U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of diesel generator technology, specifically to a reliable diesel generator PLC power supply structure. Background Technology
[0002] Diesel generators serve as emergency backup power, ensuring that critical systems receive power support and equipment continues to operate when the main power supply fails. When a diesel generator starts, the starter motor initially drives the diesel engine. Once the engine reaches a sufficient speed to ignite the diesel fuel and sustain operation, the starter motor disengages, completing the startup process.
[0003] Currently, the power supply for both the PLC and the starter motor of existing diesel generators is derived from the starting battery, and the electrical structure is as follows: Figure 1 As shown. However, the starting motor generates nearly a thousand amps of current at the moment of operation, which drastically reduces the battery voltage, causing insufficient power supply voltage to the PLC. Consequently, the PLC cannot function properly, leading to the diesel generator starting failure. Utility Model Content
[0004] The technical problem to be solved by this utility model is to provide a reliable power supply structure for a diesel generator PLC, which can improve the reliability of starting.
[0005] To address the above issues, the following technical solutions are provided: This utility model discloses a reliable diesel generator PLC power supply structure, including a starting battery and a starting motor. The starting battery is adapted and connected to the starting motor, providing electrical energy to the starting motor. The starting motor is connected to the diesel generator to drive its rotation. A key feature is the inclusion of a power supply module. The input terminal of the power supply module is connected to an external power source, and the output terminal is connected to the diesel generator PLC. The power supply module converts the voltage of the external power source into the operating voltage of the diesel generator PLC, providing electrical energy to the PLC.
[0006] The positive terminal of the starting battery is connected to the positive power supply line, the negative terminal of the starting battery is connected to the negative power supply line, the positive power supply line is connected to the positive output terminal of the charger, the negative power supply lines are all connected to the negative output terminal of the charger, and the input terminal of the charger is connected to an external power source.
[0007] The positive power supply line is connected to the positive input terminal of the starter motor via a conductor, and the negative power supply line is connected to the negative input terminal of the starter motor via a conductor. Both the positive and negative power supply lines have circuit breakers on the sections of conductors connected to the starter motor. The diesel generator PLC is adapted to the circuit breaker and is used to control the circuit breaker to turn on or off.
[0008] The diesel generator has an output switch on its power output line.
[0009] There is a switch ZKK between the input terminal of the power supply module and the external power supply.
[0010] The charger is an AC-to-DC charger.
[0011] The power supply module is a DC-DC power converter.
[0012] The above approach has the following advantages: Because the power output line of the reliable diesel generator PLC power supply structure of this invention is connected to the input terminal of the power supply module, and the output terminal of the power supply module is connected to the diesel generator PLC, the power supply module is used to convert the power voltage of the external power supply into the operating voltage of the diesel generator PLC, providing power to the diesel generator PLC. When the diesel generator needs to start, the battery provides power to the starter motor, which rotates and drives the diesel generator to rotate until the diesel engine reaches a speed sufficient to ignite the diesel fuel and maintain operation. After that, the starter motor disengages, and the diesel generator PLC is powered by the external power supply. This power supply structure eliminates the need for the diesel generator PLC to draw power from the battery, thus preventing starting failures due to a drop in battery voltage and the PLC's inability to operate normally during the initial startup phase, greatly improving starting stability. Attached Figure Description
[0013] Figure 1 This is an electrical schematic diagram of the PLC power supply structure for a diesel generator in the background technology. Figure 2 This is an electrical schematic diagram of the reliable diesel generator PLC power supply structure of this utility model. Detailed Implementation
[0014] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.
[0015] like Figure 2 As shown, the reliable diesel generator PLC power supply structure of this utility model includes a starting battery, a starter motor, and a power supply module. The starting battery is connected to the starter motor and provides power to it. The starter motor is connected to the diesel generator and drives it to rotate. The power output line of the diesel generator is connected to the input terminal of the power supply module, and the output terminal of the power supply module is connected to the diesel generator PLC. The power supply module converts the voltage of the external power source into the operating voltage of the diesel generator PLC, providing power to it.
[0016] Specifically, when the diesel generator needs to start, the battery provides power to the starter motor, which in turn drives the diesel generator to rotate until the diesel engine reaches a speed sufficient to ignite the diesel fuel and maintain operation. Once this is achieved, the starter motor disengages, and the diesel generator PLC is powered by an external power source. This prevents the diesel generator PLC from experiencing unstable power supply during the initial startup phase due to a drop in battery voltage. As a result, the diesel generator PLC is always in normal operating condition.
[0017] In this embodiment, as Figure 2 As shown, the starting battery is a 24V battery. The positive terminal of the starting battery is connected to the positive power supply line DC24V+, and the negative terminal is connected to the negative power supply line DC24V-. The positive power supply line is connected to the positive output terminal of the charger, and the negative power supply lines are all connected to the negative output terminal of the charger. The input terminal of the charger is connected to an external power source.
[0018] In this embodiment, as Figure 2 As shown, the charger is an AC to DC charger used to convert AC 380V to DC 24V. The specific model can be selected by those skilled in the art according to actual needs and is existing technology. For example, a switching power supply with model number DRT-240-24 can be used.
[0019] In this embodiment, as Figure 2 As shown, the positive power supply line DC24V+ is connected to the positive input terminal of the starter motor via a wire, and the negative power supply line DC24V- is connected to the negative input terminal of the starter motor via a wire. Both the positive and negative power supply lines have circuit breakers KM on the sections of wire connecting to the starter motor. The diesel generator PLC is adapted to connect to the circuit breaker KM to control its on / off state. When the diesel generator is running normally, the PLC controls the circuit breaker KM to open, causing the starter motor to lose power and stop running.
[0020] For safety reasons, there is an output switch on the power output line of the diesel generator.
[0021] In this embodiment, as Figure 2 As shown, the external power supply is a DC110V control power supply. The DC110V+ and DC110V- lines of the DC110V control power supply are both connected to the input terminal of the power supply module through wires. There is a switch ZKK between the DC110V+ and DC110V- lines and the input terminal of the power supply module. The power supply module is a switching power supply that converts DC110V to DC24V. The specific model can be selected by those skilled in the art according to actual needs and belongs to the prior art. For example, a switching power supply with the model LRS-100-24DC / DC can be used.
[0022] When the diesel generator needs to be started, the battery provides power to the starter motor, which in turn drives the diesel generator to rotate until the diesel engine reaches a speed sufficient to ignite the diesel fuel and maintain operation. Then, the starter motor disengages, and the diesel generator PLC is powered by an external power supply module. After that, the diesel generator PLC controls the circuit breaker KM to open, and the starter motor loses power and stops running.
[0023] This solution separates the PLC power supply for the diesel generator from the power supply for the starter motor, ensuring that the PLC power supply is unaffected by the drop in battery voltage during diesel generator startup. The diesel generator PLC power supply can utilize the output control power supply; if the voltage is different, a power module of the corresponding voltage level can be used to convert it to 24V. Applying this solution to diesel generators significantly improves the startup success rate and ensures the safe and stable operation of the power system.
Claims
1. A reliable PLC power supply structure for a diesel generator, comprising a starting battery and a starting motor, wherein the starting battery is adapted to and connected to the starting motor, the starting battery is used to provide electrical energy to the starting motor, and the starting motor is connected to the diesel generator to drive the diesel generator to rotate; characterized in that, It also includes a power supply module, whose input terminal is connected to an external power source and whose output terminal is connected to the diesel generator PLC. The power supply module is used to convert the electrical voltage of the external power source into the operating voltage of the diesel generator PLC to provide electrical energy to the diesel generator PLC.
2. The reliable diesel generator PLC power supply structure as described in claim 1, characterized in that, The positive terminal of the starting battery is connected to the positive power supply line, the negative terminal of the starting battery is connected to the negative power supply line, the positive power supply line is connected to the positive output terminal of the charger, the negative power supply lines are all connected to the negative output terminal of the charger, and the input terminal of the charger is connected to an external power source.
3. The reliable diesel generator PLC power supply structure as described in claim 2, characterized in that, The positive power supply line is connected to the positive input terminal of the starter motor via a conductor, and the negative power supply line is connected to the negative input terminal of the starter motor via a conductor. Both the positive and negative power supply lines have circuit breakers on the sections of conductors connected to the starter motor. The diesel generator PLC is adapted to the circuit breaker and is used to control the circuit breaker to turn on or off.
4. The reliable diesel generator PLC power supply structure as described in claim 1, characterized in that, The diesel generator has an output switch on its power output line.
5. The reliable diesel generator PLC power supply structure as described in claim 1, characterized in that, There is a switch ZKK between the input terminal of the power supply module and the external power supply.
6. The reliable diesel generator PLC power supply structure as described in claim 2, characterized in that, The charger is an AC-to-DC charger.
7. The reliable diesel generator PLC power supply structure as described in claim 1, characterized in that, The power supply module is a DC-DC power converter.