Adjustable speed diesel generator

Abstract

This utility model relates to the field of diesel generator technology, and in particular to a variable speed diesel generator. It also includes an inverter, a control unit, and a stepper motor. The generator set is equipped with a speed control lever, and the stepper motor is fixedly mounted on the generator set. The output end of the stepper motor is connected to the speed control lever. The control unit is connected to both the generator set and the inverter. The inverter is connected to the generator set and is used to collect the generator set's voltage. Through the cooperation of the control unit, inverter, and stepper motor, the inverter collects the generator set's voltage and determines the generator speed based on the transmission frequency. The inverter sends the collected output to the control unit. The control unit compares the collected data with set data to control the stepper motor's output, thereby controlling the speed control lever and controlling the generator set's speed. This achieves automated control of the generator set's speed, ensuring stable and reliable power output.

Description

Technical Field

[0001] This utility model relates to the field of diesel generator technology, and in particular to adjustable speed diesel generator. Background Technology

[0002] Diesel generators serve as backup power systems for critical facilities and important occasions. Their main function is to quickly start operation when the mains power is suddenly interrupted, so as to ensure continuous power supply to the load equipment and avoid operation interruption or safety accidents due to power loss.

[0003] Currently, most diesel generator sets rely on manual mechanical adjustment to control speed. Operators need to adjust the unit speed according to the actual power output requirements to adapt to different power output scenarios.

[0004] However, under actual operating conditions with dynamically changing loads, this type of manual speed control method has significant limitations. Since load fluctuations cause changes in the generator's output torque, if the speed control system cannot respond quickly and accurately, the generator speed will fluctuate, leading to instability in output voltage and frequency. This fluctuation in power quality not only affects the normal operation of electrical equipment but can also trigger motor protection actions or even shutdown in severe cases, directly impacting the reliability of the diesel generator as a backup power source. Consequently, it becomes difficult to meet the continuous power supply needs of critical applications with stringent power quality requirements. Summary of the Invention

[0005] The technical problem to be solved by this utility model is: In order to solve the problem that existing diesel generators rely on manual adjustment to achieve speed control, the output torque of the unit will change due to load fluctuations, which will cause the generator speed to fluctuate, and thus cause instability in output voltage and frequency. This not only affects the normal operation of electrical equipment, but may also trigger motor protection action or even shutdown in severe cases, directly affecting the reliability of diesel generators as backup power. Therefore, an adjustable speed diesel generator is provided.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: a variable speed diesel generator, including a generator set, an inverter, a control unit, and a stepper motor. The generator set is equipped with a speed control lever, and the stepper motor is fixedly mounted on the generator set. The output end of the stepper motor is connected to the speed control lever. The control unit is connected to both the generator set and the inverter. The inverter is connected to the generator set and is used to collect the generator set's voltage and determine the generator speed based on the frequency. Compared with existing technologies, this solution utilizes the cooperation between the control unit, the inverter, and the stepper motor. The inverter collects the generator set's voltage and determines the generator speed based on the frequency. The inverter transmits the collected frequency to the control unit. The control unit compares the collected data with set data to control the output end of the stepper motor, thereby controlling the speed control lever and controlling the generator set's speed. This achieves automated control of the generator set's speed, ensuring stable and reliable power output.

[0007] To facilitate the installation of the stepper motor onto the generator set, in some preferred embodiments, a mounting bracket is fixedly installed on the generator set, and the stepper motor is fixedly mounted on the mounting bracket. The stepper motor is conveniently and reliably installed on the generator set using the mounting bracket.

[0008] To facilitate manual control of the generator set speed, in some preferred embodiments, a limiting mechanism for transmitting torque is provided between the stepper motor and the speed control lever.

[0009] To implement the limiting mechanism, in some preferred embodiments, the limiting mechanism includes a pin. The output end of the stepper motor has an axial hole that matches the speed control rod. A first pin hole is radially formed on the outer circumferential surface of the stepper motor's output end, communicating with the hole. A second pin hole is formed on the speed control rod, with the first and second pin holes corresponding to each other. The speed control rod is disposed within the hole. One end of the pin passes through the first pin hole and is inserted into the second pin hole. By aligning the first pin hole on the outer circumferential surface of the stepper motor with the second pin hole on the speed control rod, and cooperating with the pin, the stepper motor and the speed control rod are fixed together and torque is transmitted.

[0010] In some preferred embodiments, the mounting bracket has a fixing part and a mounting part disposed on the fixing part. The fixing part is fixedly mounted on the generator set, and the mounting part is disposed opposite to the generator set. A slot is provided on the mounting part, and the stepper motor is fixedly mounted on the mounting part.

[0011] The beneficial effects of this utility model are as follows: When the adjustable-speed diesel generator of this utility model is in use, the control unit, inverter, and stepper motor cooperate with each other. The inverter collects the voltage of the generator set and determines the generator speed based on the frequency. The inverter sends the collected output to the control unit. The control unit compares the collected data with the set data and controls the output of the stepper motor to control the rotation of the speed control lever, thereby controlling the speed of the generator set. This achieves automated control of the generator set speed, ensuring stable and reliable power output. It avoids the problem of existing diesel generators relying on manual adjustment for speed control. Since load fluctuations will cause changes in the output torque of the unit, the generator set speed will fluctuate, which will lead to instability in the output voltage and frequency. This not only affects the normal operation of electrical equipment, but may also trigger motor protection actions or even shutdown in severe cases, directly affecting the reliability of the diesel generator as a backup power source. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 yes Figure 1 A magnified view of part A in the image; Figure 3 This is an exploded view of this utility model; Figure 4 yes Figure 3 A magnified view of part B in the image; Figure 5 This is a three-dimensional structural diagram of the mounting bracket in this utility model; Figure 6 This is the front view of this utility model; Figure 7 yes Figure 6 A magnified view of part C.

[0014] In the diagram: 1. Generator set, 2. Stepper motor, 3. Speed ​​control lever, 4. Mounting bracket, 5. Pin, 7. First pin hole, 8. Second pin hole, 9. Fixing part, 10. Mounting part, 11. Slot, 12. Inverter. Detailed Implementation

[0015] like Figure 1-7As shown, a variable-speed diesel generator includes a generator set 1, an inverter 12, a control unit, and a stepper motor 2. A speed control lever 3 is installed on the generator set 1. The stepper motor 2 is fixedly mounted on the generator set 1, and its output terminal is connected to the speed control lever 3. The control unit is connected to both the generator set 1 and the inverter 12. The inverter 12 is connected to the generator set 1 and is used to collect the voltage of the generator set 1 and determine the generator speed of the generator set 1 by measuring the frequency. In this embodiment, the control unit is a microcontroller.

[0016] A mounting bracket 4 is fixedly installed on the generator set 1, and the stepper motor 2 is fixedly installed on the mounting bracket 4.

[0017] A limit mechanism is provided between the stepper motor 2 and the speed control rod 3. The limit mechanism is used to transmit torque. The limit mechanism includes a pin 5. The output end of the stepper motor 2 is provided with a hole along its axial direction that matches the speed control rod 3. A first pin hole 7 is provided on the outer circumferential surface of the output end of the stepper motor 2 along its radial direction. The first pin hole 7 communicates with the hole. A second pin hole 8 is provided on the speed control rod 3. The first pin hole 7 and the second pin hole 8 are provided correspondingly. The speed control rod 3 is set in the hole. One end of the pin 5 passes through the first pin hole 7 and is inserted into the second pin hole 8.

[0018] The mounting bracket 4 has a fixing part 9 and a mounting part 10 provided on the fixing part 9. The fixing part 9 is fixedly installed on the generator set 1, and the mounting part 10 is arranged opposite to the generator set 1. The mounting part 10 has a slot 11, and the stepper motor 2 is fixedly installed on the mounting part 10.

[0019] The specific working principle of the above-mentioned adjustable speed diesel generator is as follows: Generator set 1 operates and generates electricity. The multi-stage permanent magnet motor of generator set 1 provides three-phase AC voltage to inverter 12. Inverter 12 collects the voltage and can determine the current actual speed of the engine from the voltage frequency. Based on the comparison between the voltage frequency and the frequency of the set voltage of the control unit, the control unit controls the stepper motor 2 to rotate forward or reverse, so as to realize the function of electronic speed regulation of the engine and realize the automatic speed regulation of the engine.

[0020] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A variable speed diesel generator, comprising a generator set (1), characterized in that: It also includes an inverter (12), a control unit and a stepper motor (2). The generator set (1) is equipped with a speed control lever (3). The stepper motor (2) is fixedly installed on the generator set (1). The output end of the stepper motor (2) is connected to the speed control lever (3). The control unit is connected to the generator set (1) and the inverter (12) respectively. The inverter (12) is connected to the generator set (1) and is used to collect the voltage of the generator set (1) and determine the generator speed of the generator set (1) by the frequency.

2. The adjustable speed diesel generator according to claim 1, characterized in that: The generator set (1) is fixedly mounted on a mounting bracket (4), and the stepper motor (2) is fixedly mounted on the mounting bracket (4).

3. The adjustable speed diesel generator according to claim 1 or 2, characterized in that: A limiting mechanism for transmitting torque is provided between the stepper motor (2) and the speed control rod (3).

4. The adjustable speed diesel generator according to claim 3, characterized in that: The limiting mechanism includes a pin (5). The output end of the stepper motor (2) is provided with a hole along its axial direction that matches the speed control rod (3). The outer circumferential surface of the output end of the stepper motor (2) is provided with a first pin hole (7) along its radial direction. The first pin hole (7) communicates with the hole. The speed control rod (3) is provided with a second pin hole (8). The first pin hole (7) and the second pin hole (8) are provided correspondingly. The speed control rod (3) is provided in the hole. One end of the pin (5) passes through the first pin hole (7) and is inserted into the second pin hole (8).

5. The adjustable speed diesel generator according to claim 2, characterized in that: The mounting bracket (4) has a fixing part (9) and a mounting part (10) provided on the fixing part (9). The fixing part (9) is fixedly installed on the generator set (1). The mounting part (10) is arranged opposite to the generator set (1). The mounting part (10) has a slot (11). The stepper motor (2) is fixedly installed on the mounting part (10).

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