Introduction to the Application of Stable Voltage Power Supply in the Protection of Laser Cutting Machines
The stabilized power supply of the laser cutting machine mainly observes the compensation transformer to see if the temperature rise of the voltage regulating transformer is normal, and if there are any abnormal phenomena such as overheating and coil discoloration.
Check whether the contact of the carbon brush is maintained well, monitor whether the input and output voltages are normal, and whether there is any overload phenomenon.
In order to carry out good maintenance, it is generally necessary to remove dust and dirt from various components of the metal laser cutting machine regulator every three months;
Check if the chain transmission system is working properly, add oil to the sprocket, adjust the tightness of the chain, check if the carbon brush holder is tilted or stuck, and adjust it if found.
In addition, it is also necessary to check whether the electrical contacts of the metal laser cutting machine are damaged;
If any, it should be replaced or repaired in a timely manner:
Check whether the column type voltage regulating transformer operates flexibly, whether the carbon brushes are intact, and replace damaged or severely worn carbon brushes in a timely manner;
If there are burns or carbon brush powder on the contact surface of the coil, it should be promptly polished with No. 0 fine sand and dust removed.
The stable power supply protection function of the laser cutting machine:
Overvoltage output exceeds 10% of the rated voltage (adjustable), with a delay of 3-5 seconds to cut off the output power supply
Undervoltage output below -15% of rated voltage (adjustable), with a delay of 3-5 seconds to cut off output power
Delay 2 seconds to cut off output power
When the overcurrent exceeds the rated output current, delay 3-5 seconds to cut off the output power supply
When the load device is short circuited, cut off the output power supply
When there is an error in the reverse equivalent three-phase electrical phase sequence, the machine alarms and cuts off the output power supply
When there is a lack of three-phase power, the machine will alarm and cut off the output power supply
So what precautions do we usually need to pay attention to when using a regulated power supply?
1. Firstly, the operation involves adjusting the knob or button according to the actual required voltage and current;
If the required voltage is directly in the gear position, the main knob should be adjusted to position, and then the fine knob should be adjusted. For example, 13V is actually required;
So, the main knob should be adjusted to 15V first, and then adjusted through the auxiliary knob.
The main knob should not be adjusted to 10V, as this may cause the voltage to not necessarily reach 13V.
2. If a load needs to be used, it should be adjusted to the required voltage before connecting to the load.
3. When using a DC regulated power supply, it is necessary to adjust the "coarse adjustment" gear;
The load must be disconnected first, the voltage adjusted, and then reconnected to the load.
4. When we encounter a load short circuit or overload that causes protection during reuse;
The load should be disconnected first, and then the "reset" button should be pressed to restart the voltage;
The voltage can resume normal operation and wait for one of the faults to be resolved before connecting to the load.
