The KGLF11 thyristor excitation device is suitable for constant excitation of synchronous motors starting under heavy or light loads, and is also applicable for excitation of small generators. This device has the following features:
1.The rotor circuit of the synchronous motor adopts a three-phase fully controlled rectifier bridge fixed excitation circuit, maintaining the inherent starting characteristics of the synchronous motor.
2. There is no direct electrical connection with the stator circuit of the synchronous motor. Therefore, the synchronous motor can be designed as high-voltage (3-6-10KV) or low-voltage (380V) according to the conditions of the power grid, and full-voltage starting or reduced-voltage starting is not restricted.
3.When starting a synchronous motor at full voltage, when its speed reaches sub-synchronous, excitation can be put into operation with a rotor slip of 5% to 4% in the forward polarity to drag the synchronous generator motor into synchronous mode. Alternatively, excitation operation can be delayed for a certain period of time after the motor is connected to the power grid.
4. For a synchronous motor starting with reduced voltage, when the rotor speed reaches about 90% of the synchronous speed, the reduced voltage starting reactance or resistance is automatically disconnected, and the full voltage is automatically engaged to accelerate the start-up of the synchronous motor to sub-synchronous speed. The excitation is carried out in a stepwise manner with a slip of 5% to 4%, thus pulling the synchronous motor into synchronous operation.
5. When the grid voltage fluctuates, it features negative voltage feedback and automatically maintains a basically constant excitation. When the grid voltage drops to a certain percentage, it suddenly intensifies the excitation, with a strong excitation time of 10 seconds or 40 seconds.
Key words：
Techicel Conditions
| Elevation | No more than 1000m |
| Ambient temperature | Not lower than -10°C and not higher than +40°C |
| Maximum relative humidity of the air | Not more than 90% (at the equivalent of air temperature 20±5°C). |
| Where to run | No conductive and explosive dust, no corrosive metal and insulating gases or vapors, no violent vibration and shock. |
Synchronous motor excitation device
| Model | AC input | DC output | Rectified line | Overall Dimensions (mm) | remark | |||||
| Count | Voltage (V) | Power (KW | Current (A) | Voltage (V) | high | wide | deep | |||
| KGLF11-100A/170V | 3 | 380 | 17 | 100 | 170 | Bridge style | 2200 | 600 | 800 | Machine |
| KGLF11-150A/200V | 3 | 380 | 30 | 150 | 200 | Bridge style | 2200 | 600 | 800 | Machine |
| KGLF11-200A/250V | 3 | 380 | 50 | 200 | 250 | Bridge style | 2200 | 600 | 800 | Machine |
| KGLF11-250A/300V | 3 | 380 | 75 | 250 | 300 | Bridge style | 2200 | 600 | 800 | Machine |
| KGLF11-300A/400V | 3 | 380 | 120 | 300 | 400 | Bridge style | 2200 | 600 | 800 | Machine |
| KGLF11-350A/500V | 3 | 380 | 175 | 350 | 500 | Bridge style | 2200 | 600 | 800 | Machine |
| KGLF11-400A/600V | 3 | 380 | 240 | 400 | 600 | Bridge style | 2200 | 600 | 800 | Machine |
| KGLF11-450A/700V | 3 | 380 | 315 | 450 | 700 | Bridge style | 2200 | 600 | 800 | Machine |
| KGLF11-550A/800V | 3 | 380 | 440 | 550 | 800 | Bridge style | 2200 | 600 | 800 | Machine |
| KGLF11-650A/1000V | 3 | 380 | 650 | 650 | 1000 | Bridge style | 2200 | 600 | 800 | Machine |
| KGLF11-750A/1100V | 3 | 380 | 825 | 750 | 1100 | Bridge style | 2200 | 800 | 1000 | Machine |
| KGLF11-800A/1200V | 3 | 380 | 960 | 800 | 1200 | Bridge style | 2200 | 800 | 1000 | Machine |
| KGLF11-850A/1300V | 3 | 380 | 1105 | 850 | 1300 | Bridge style | 2200 | 800 | 1000 | Machine |
| KGLF11-900A/1400V | 3 | 380 | 1260 | 900 | 1400 | Bridge style | 2200 | 800 | 1000 | Machine |
| KGLF11-950A/1500V | 3 | 380 | 1425 | 950 | 1500 | Bridge style | 2200 | 800 | 1000 | Machine |
| KGLF11-1000A/1600V | 3 | 380 | 1600 | 1000 | 1600 | Bridge style | 2200 | 800 | 1000 | Machine |
FAQ
Here, common questions are answered and clarified
Voltage fluctuation fault
● Youdaoplaceholder6 Common causes:
- The external power supply is unstable or abnormal.
- There is a wiring error during the operation of the equipment.
- Environmental factors (such as temperature changes) cause voltage fluctuations.
● Solve the problem:
- Use a reliable power supply and avoid relying on external power sources.
- Check and adjust the connection method of the equipment.
- Reserve sufficient protection circuits or use step-down circuits to limit the impact of voltage fluctuations.
Short-circuit fault
● Youdaoplaceholder6 Common causes:
- Internal circuit short circuit (such as coil damage).
- External short circuit (such as short-circuiting of power pins).
● Solve the problem:
- Inspect the internal structure of the equipment, identify and repair the short-circuit points in the internal circuits.
- Use disconnected pins or external pins for protection and isolation.
- Reserve sufficient buffer layers or cooling systems to prevent the silicon wafers from overheating and getting damaged.
Current out-of-control (IQN) fault
● Youdaoplaceholder6 Common causes:
- The external current is too large, causing the silicon wafer to bear an excessively high current.
- During the operation of the o equipment, the load was too heavy, causing the silicon wafers to be overloaded.
● Solve the problem:
- Reserve sufficient safety current to ensure that the current during equipment operation does not exceed the designed maximum value of the silicon wafer.
- Use protection circuits or step-down circuits to limit the influence of external currents.
- Reserve sufficient buffer layers to prevent excessive current from damaging the silicon wafer.
Excessively high temperature fault
● Youdaoplaceholder6 Common causes:
- High-temperature environments cause silicon wafers to expand due to heat and get damaged.
- The cooling system failed to effectively cool the silicon wafers.
● Solve the problem:
- Reserve sufficient buffer layers or cooling systems to prevent the silicon wafers from overheating and getting damaged.
- Use a heat sink or coolant (such as water) to lower the temperature of the silicon wafer.
- Regularly inspect and maintain the cooling system of the equipment.
Overload fault
● Youdaoplaceholder6 Common causes:
- During the operation of the equipment, the load was too heavy, causing the silicon wafers to bear excessive current.
- If the external load exceeds the design maximum value of the silicon wafer, it may cause damage to the silicon wafer.
● Solve the problem:
- Reserve sufficient safety load to ensure that the load during equipment operation does not exceed the design maximum value of the silicon wafer.
- Use protection circuits or step-down circuits to limit the influence of external loads.
- Reserve sufficient buffer layers to prevent the silicon wafer from being damaged due to excessive load.
Summary of Solutions for Current Anomaly (IQN) Faults
● Test with a volt-ampere meter: Measure the output voltage and current to ensure they meet the design parameters of the silicon wafer.
● Apply phase difference test: Check the phase deviation of the silicon wafer to ensure its stability in AC signals.
● Dynamic calibration equipment: Dynamically adjust the equipment or external power supply according to the actual working environment (such as temperature changes).
Through regular Testing and Diagnosis processes, faults of thyristor equipment can be identified and resolved more accurately.
Certification
It has passed the ISO9001:2015 quality management system certification. In 2005, it was awarded the titles of "National Rectifier Product Quality Assurance and Honest Business Demonstration Unit" and "National AAA Quality Brand Enterprise" by the China Marketing Association. It has been rated as a "Contract-abiding and Creditworthy Enterprise" by the Wuhan Administration for Industry and Commerce for many years.
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The total number of employees in the unit, including the situation, number and composition ratio of technical personnel at all levels, currently has over 60 employees, including more than 18 engineering and technical personnel. Among them, there are 4 senior engineers, 10 engineers, and 4 assistant engineers and technicians.
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