Power refers to the amount of work done by an object in a unit of time, i.e., power is a physical quantity that depicts how fast or slow work is done. The amount of work is constant, and the shorter the moment, the greater the power value. The formula for finding power is power = work/moment. Power is a physical quantity that characterizes the degree of work done fast or slow. The work done per unit of time is called power and is denoted by P. Therefore, the power is equal to the scalar product of the force and the velocity of the point where the object is stressed.
Power is the amount of work done per unit of time or the amount of energy converted. If the work is done in a moment, the average power in that time is given by: Instantaneous power is the average power at a time when it approaches 0: When commenting on the problem of energy conversion, letters are sometimes used.
Power is a physical quantity that indicates how fast or slow work is done. The ratio of work to the time taken to do the work is called power, which is numerically equal to the work done per unit of time, and is denoted by P. If the work dA is done within the distance dt at the moment, then the power is therefore equal to the scalar product of the force and the velocity of the point of force on the object.
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Quickly locate the fault method of switching power supply - LS power generation
Due to the short circuit of the load, the failure of the self-oscillation circuit and the loss of control of the protection circuit, the switching power supply will cause the base of the switch tube to be unable to get the switching pulse and intermittent operation, which makes it difficult to locate the shortcomings of SMPS. The difficulty of the repair operation and the improper method will expand the shortcomings, constituting the phenomenon of continuous burning of the switch pipe, etc., ...
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Three-phase motor current is too high - LS power generation
First, the power supply problem
1. The power supply voltage is too high
When the power supply voltage is too high, the motor back electromotive force, magnetic flux and magnetic flux density all increase. Since the magnitude of the iron loss is proportional to the square of the magnetic flux density, the iron loss increases, resulting in overheating of the core. And the increase in magnetic flux causes ...
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Power production PLC installation and wiring skills
The PLC should be kept away from strong disturbance sources such as electric welding machines, high-power silicon rectifier equipment and large-scale power equipment, and cannot be installed in the same switch cabinet as high-voltage electrical appliances.
Power line, control line and PLC power line and I/O line should be separated from the wiring, barrier transformer and PLC and I/O should be selected ...
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LS electric braking unit functions, advantages and operation process
First, the main function of the braking unit
In some applications, the need for rapid speed reduction, according to the principle of asynchronous motor, it can be known that if the slip is larger, the greater the torque, the same braking torque will increase with the increase of the speed reduction rate, so that the system speed reduction time is greatly shortened, and the energy feedback is greatly ...
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Introduction of LS electric power contactors
How LS Contactor Works:
Generally, after the contactor coil is energized, the entire coil current will generate a magnetic field, which will make the core inside have electromagnetic attraction to attract the core, and let their communication contactor point action normally closed contact disconnect, or close, which ...
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Elements of LS power inverter operation
1. Physical environment
(1) Temperature factor
Temperature has a huge impact on the lifetime and reliability of the electronic components inside the inverter. When using the inverter in a high operating temperature environment, it is necessary to take additional cooling measures to ensure that the ambient temperature is stable in the inverter.
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The basic problem of LS electric molded case circuit breaker
Rated current of LS molded case circuit breaker:
Now in the process of using the molded case circuit breaker, it is necessary to understand the rated current of the molded case circuit breaker, and the rated current of the molded case circuit breaker is generally more than a dozen, mainly 16A...
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Application of servo motor - LS power generation
Quick to use:
There are three cables necessary for the operation of the motor: power cable; Motor power line, motor encoder line.
Control line interface X5:
Servo enable necessary pin C24V power supply (7,41) Servo enable SR ...
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Interference phenomenon of LS power inverter
1. As soon as the inverter of the heat exchange station is opened, the pressure transmitter jumps randomly;
2. In the water supply controlled by the inverter, the pressure transformer is used as a signal to collect the pressure, and the pressure transformer is disturbed by the inverter;
3. When the inverter starts the motor, the voltage converter signal is unstable and beats violently;
4. Pressure transformer (4-20 ...
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How LS produces power PLC operation
Although many relays, timers and counters are often used in the ladder diagram programs used by LS PLC, LS PLC does not have these hardware physically, but uses memory and program programming methods to make logic control modifications, and connects external machines through output components.
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LS Group witnesses the reopening of the "Viet Nam Professional Football League".
The Viet Nam Professional Football League, sponsored by LS Group, began operations in June and is hosted by Viet Nam Professional Football Joint Stock Company. With the comeback of football events such as the Korea K League and the Bundesliga, more and more football events are also brewing to restart.
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Common faults and countermeasures of power inverters
1. OC failure
Like other inverters, overcurrent alarm is also a common fault of power inverter, in addition to the reasons for parameter settings such as acceleration and deceleration time, there are mainly the following possibilities in hardware: damage to high-power modules may cause OC alarm, low-power economical inverter ...
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The method of resetting the fault of the inverter
1. Power off the inverter and power it back on;
2. Press the FN button on BOP-2;
3. After the digital input 3, the default setting of 3 is reset to the problem;
4. Press the P button or power off, in the case of no problem;
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Fault analysis of the main circuit of the inverter - LS power generation
According to the statistical analysis of the frequency and shutdown time of the inverter's detailed common problems, the correction rate of the main power supply circuit accounts for more than 60%; The main operating parameters are not set properly, resulting in about 20% of common problems; Common problems with control circuit boards account for 15%; 5% of common problems are caused by incorrect operation and external anomalies ...
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LS takes you to understand the inverter in the inverter
Contrary to the rectifier, the inverter converts the DC power into the communication power of the required frequency, and the 3-phase communication output can be obtained by turning on and off the 6 switching devices at the confirmed time. Take a voltage-type PWM inverter as an example to show the switching time and voltage waveform.
Control circuit ...
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The power of LS power inverter is selected
The relationship curve between the load rate β and the power η of the inverter can be seen: when β = 50%, η = 94%; When β = 100%, η = 96%. Although the β has doubled, the η change is only 2%, but it is also considerable for medium to high power (a few hundred kilowatts to several thousand kilowatts) electric motors. The system power is equal to the inverter power ...
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The basic component of the inverter is LS power generation
The inverter is usually divided into 4 parts: the rectifier unit, the high-capacity capacitor, the inverter and the controller.
Rectifier unit: converts alternating current with a fixed operating frequency into direct current.
High Capacitance: Stores converted electrical energy.
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The production power takes you to read the PLC ladder diagram
1. Trapezoidal stairs start from the horizontal line and end up with a vertical line (generally you can omit not to draw, only draw the left busbar). On the left side of each row is the junction combination, indicating the conditions that drive the logic coil, while the logic coil indicating the effect can only be connected to the bus on the right. The contact can not appear in the coil right ...
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The cause of the failure of low-voltage electrical appliances - LS power generation
In the control circuit of low-voltage electrical appliances, there are simple low-voltage components such as: buttons, safe, etc.; There are also slightly messy low-voltage electrical control components, such as circuit breakers, touch devices, time relays, thermal relays and other simple components, which makes it necessary to diagnose and analyze the cause of the problem.
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Recommended models for power production contactors
GMC-6 Contactor GMC-6 Rated voltage: 110V/22OV/380V;
GMC-9 Contactor GMC-9 Rated voltage: 110V/22OV/380V;
GMC-12 Contactor GMC-12 Rated voltage: 110V/22OV/380V;
GMC-18 Contactor GMC-18 Rated voltage 110V/ ...
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