The inch movement in Schneider inverter means that the control signal can drive the motor intermittently according to a certain law, and the motor strictly follows the dynamic and stop command action of the control signal, and the motor does not roll by inertia during the shutdown. It's like moving an inch and then stopping.
Schneider inverter, the full name of "Schneider AC inverter governor", is a well-known inverter brand developed, produced and sold by Schneider Electric Group in France. It is mainly used to control and regulate the speed of three-phase AC asynchronous motors, and occupies an important position in the inverter market with its stable functions, rich combination functions, outstanding dynamic characteristics, super overload capacity and unparalleled flexibility. It is widely used in various industrial fields, especially in elevators, textiles, machine tools, lifting and transportation, and ports.
issue
1. Overcurrent
Overcurrent problems can be divided into acceleration, deceleration, and constant overcurrent. It may be caused by the acceleration and deceleration time of the inverter is too short, the load is abruptly changed, the load is unevenly distributed, and the output is short-circuited. At this time, it is generally possible to extend the acceleration and deceleration time, reduce the sudden change of load, add energy consumption braking elements, carry out load distribution design, and check the line. If the load inverter is still overcurrent, it is clarified that the inverter circuit of the inverter has been looped and the inverter needs to be replaced.
2. Overload
Overload problems include frequency conversion overload and motor overload. It may be caused by the acceleration time being too short, the grid voltage being too low, and the load being too heavy. Generally, it can be extended to accelerate the time, extend the braking time, check the grid voltage, etc. The load is too heavy and the selected motor and inverter cannot drag the load, perhaps because the machinery is not smooth enough. If the former is the former, the high-power motor and inverter must be replaced; In the case of the latter, the production machinery needs to be overhauled.
maintenance
1. When designing, installing and using the inverter, it is necessary to follow the guidance of the inverter application statement;
2. All electrical designers and on-site electrical commissioning personnel can improve the inverter reference on this basis.
(1) Schneider inverter should be an earlier brand to enter the Chinese market, so some old products like Schneider inverter, Schneider inverter still has a large number of users in use, let's first analyze the common problems of these two series of products.
(2) Schneider inverter our most common problem is that there is no manifestation of power-on, the switching power supply of this series of inverter uses a UC2842 chip as a waveform generator, the damage of the chip will cause the switching power supply to be unable to operate, so that it can not be displayed normally, in addition, the abnormal operation power supply of the chip will also make the switching power supply unable to operate normally.
(3) Schneider inverter our more common problems are the damage of the drive circuit, as well as the damage of the IGBT module, the drive circuit is driven by a pair of tubes to drive the IGBT module, and this pair of tubes is also the simplest damage components, the cause of damage is often because of the damage of the IGBT module, resulting in high voltage and high current into the drive circuit, resulting in damage to the components of the drive circuit.
(4) Schneider inverter, we often encounter the problem of F008 (low DC voltage), because it is directly through the resistance step-down to obtain the sampling signal, so the appearance of the fault F008 is mainly caused by the damage of the sampling resistor.
(5) Schneider inverter F025, F026, F027, about the alarm of the lack of input phase, the reason for the fault is that the 6SE70 series itself has the input phase detection function, the damage of the input detection circuit will lead to the input phase loss alarm, if the cause of this problem is eliminated, the alarm signal can not be eliminated, then the problem is likely to be the damage of the CU board.
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Precautions for external wiring of the inverter
In the process of connecting the line of the inverter, it is necessary to pay attention to the following aspects:
1. The power supply must be connected to the main circuit power terminal L1/R, L2/S, L3/T, if the power supply is connected to other terminals by mistake, the inverter will be damaged.
2. It is necessary for the grounding terminal to be well connected.
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The 7 peripherals of the inverter governor - Schneider
1. Air circuit breaker is an active electrical appliance that can not only touch and disconnect the circuit normally, but also operate under abnormal conditions such as overcurrent, reverse current, short circuit and loss (under)voltage. Its primary role is to maintain the electrical equipment in the AC and DC circuits, and it can also operate the circuits infrequently. ...
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Factors influencing the differential thermal analysis of instrumentation - Schneider
The operation of differential thermal analysis is simple, but in practical work, it is often found that the same sample is measured on different instruments, or different measurements are measured on the same instrument, and the results of the differential thermal curve of industrial electrical appliances are different. The high temperature, shape, area, and size of the peaks will all change. ...
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The inverter controls the direction of the motor – Schneider
If the direction of rotation at this moment is opposite to the steering required by the equipment, please put F0-13=1 or after power-off (note that the main capacitor charge discharge of the inverter is over), the UVW output line of the inverter ...
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Schneider electrical circuit control fault range
In general, depending on the phenomenon of equipment problems, the scope of the problem can be roughly confirmed as follows:
1) All button functions fail, and there is a high possibility of power supply or fuse problems.
2) Some buttons are invalid, and some of the buttons are functioning normally ...
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Schneider inverter control circuit
1. What is a control loop?
The network that supplies the control signal to the main circuit that supplies power to the asynchronous motor (voltage and frequency can be adjusted) is called the control loop.
Second, the composition of the control loop
The control circuit is controlled by the frequency ...
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Turbine flowmeter selection factor - Schneider
Turbine flowmeter is a kind of speed appearance, it has high precision, good repeatability, no zero drift, high range ratio, simple structure, few moving parts, high pressure resistance, wide measurement scale, small size, light weight, small pressure loss, convenient repair and other advantages, turbine flowmeter has high quality ...
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Suppression of higher harmonics of inverter - Schneider
1. About the management of higher harmonics on the output side of the inverter
The magnetic noise skills brought about by the communication harmonic components contained in the output waveform controlled by PWM control have been increasingly used in various inverters, such as the selection of higher frequency switching components, the installation of filter devices at the output end of the inverter, etc.
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The form of power input and output - Schneider
1. Single-phase input/single-phase output:
If the capacity is relatively small, the single-entry UPS hanging on any phase of the mains will not be troublesome to the three-way distribution balance of the mains, the load capacity is small, and the output line diameter (current value) of the single-phase output is not ...
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Precautions for the installation of low-voltage electrical appliances - Schneider
1. Low-voltage electrical appliances should be equipped in a place without violent vibration, and should have an appropriate height from the ground. It is necessary to connect the power cord such as the knife switch and the load switch to the fixed contact, and it is forbidden to hang the power cord on the knife switch.
2. Low-voltage ...
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Features of Schneider explosion-proof inverter box
1. Aluminum alloy shell or steel plate welding, surface spraying;
2. Built-in inverters, circuit breakers, signal lights and other components produced by domestic or Schneider and other companies;
3. It is mainly adjusted by changing its output frequency to adjust the speed of ordinary three-phase asynchronous motor, so as to reach the production process.
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Safety PLC is different from ordinary PLC
A safety PLC differs from conventional PLCs in that it needs to be certified for safety by a third-party professional organization and meet stringent international standards for safety and reliability. There is a need for a thorough systematic approach to the planning and testing of safety PLCs. TUV*** in Germany and FM*** in United States ...
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Precautions for the selection of Schneider molded case circuit breaker
1. Shell current and rated current
The size of the shell current is 100 (rated current 16 25 32 40 63 80 100) 250 (rated current 160 250 400 (rated current 250 400) 630 (rated current 630A.)
...
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Design and calculation method of inverter braking resistance - Schneider
1. The number of braking resistor boxes is roughly calculated as: motor power (KW)/11.2 (take the upper limit of the integer).
2. The selection of the power of the braking unit is generally (1-2) times the power of the inverter;
3. The function of braking resistor ...
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Analysis of the causes of Schneider touch screen touch deviation
(1) Fault--: Contact error
Phenomenon 1: The direction of the finger does not coincide with the mouse arrow.
Reason 1: After installing the driver, there is no vertical contact with the bullseye center when correcting the bearing. Solution 1: Re-align the bearing.
Phenomenon 2: Some districts ...
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Where the inverter filter is suitable - Schneider
1. LC filter
LC filter is suitable for occasions with low requirements for harmonic content, and a good LC filter can control the distortion rate at 8-10%;
2. Harmonic filter
This filter is suitable for harmonic ...
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Functions of input/output pins P0, P1, P2, P3 – Schneider
P0.0——P0. 7 : Port P0 is an 8-bit open-drain bidirectional I/O port. When visiting off-chip memory, it is time-shared for a low-8-bit address and an 8-bit bidirectional data bus. When EPROM is programmed, the instruction byte is input by P0, and when the program is verified, it outputs ...
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Precautions for the selection of Schneider foot switches
The foot switch series is XPE, and it should be noted when selecting:
1) Raw materials: metal and plastic, which are used in heavy-duty, high-risk, light-duty, low-risk occasions.
2) Pedal: divided into single pedal and double pedal (type end plus D).
3) With or without maintenance cover ...
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How Schneider contactors work
1. Contactor refers to an electrical appliance that uses a coil to flow through an electric current to generate a magnetic field, so that the contact is closed, and then the load can be controlled. Because it can quickly block the main circuit and frequently connect the equipment with high-current control circuits, it has been widely used in electrical engineering.
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Schneider DC air open up plus or minus? How to connect the incoming and outgoing lines?
The air switch is divided into the upper inlet line and the lower inlet line of the power supply, 1 is - 3 is + 2 is + 4 is - when the upper line is inlet, 2 is + 4 is - This is related to the internal trip curve.
DC circuit breaker is used for DC system operation method conversion or fault removal ...
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