Product Introduction

Siemens power board C98043-A1663-L44-09 is mainly used to provide a stable power supply to ensure the normal operation of related equipment. The power board adopts VVVF (variable voltage, variable frequency) technology, which can work under different voltage and frequency conditions to adapt to different industrial environment requirements.

Definition of VVVF and CVCF

VVVF: Abbreviation of variable voltage and variable frequency.

CVCF: Abbreviation of constant voltage and constant frequency.

Functional characteristics
Working principle and application of inverter

Inverter is a device used to convert alternating current into alternating current with variable voltage or frequency. It is widely used in various fields, especially in motor control. Through the inverter, the rotation speed of the motor can be effectively controlled, thereby achieving the purpose of energy saving and improving production efficiency.

Control of motor rotation speed
The rotation speed of the motor is proportional to the frequency of its power supply. By changing the frequency of the power supply, the rotation speed of the motor can be controlled. For example, in order to halve the rotation speed of the motor, the output frequency of the inverter must be changed from 60Hz to 30Hz, and the output voltage must be adjusted accordingly.

Importance of heat dissipation
When using the inverter, it is important to pay attention to the heat dissipation problem. Because the inverter generates a lot of heat, if it is not properly handled, it will seriously affect its service life. Generally, it is recommended to install the heat sink part of the inverter outside the control cabinet to reduce the heat generated inside the control cabinet.

Application range
Siemens power board C98043-A1663-L44-09 is mainly used for speed control systems, such as power supply of Siemens PLC controller CPU315-2PN/DP and other equipment. In addition, the power board can also be docked and installed with the Siemens inverter g120c compact inverter to achieve lossless and efficient operation.

The function of the power board is to supply power to various modules and convert the battery voltage into the voltage required by each module. The output voltage of the power board generally has 5V 3.3V adjustable voltage. The advantage of the linear voltage regulator chip compared with the DC...DC power conversion chip is that the output voltage ripple is much smaller. When the power system design and latyout are well done, the peak-to-peak value of the output voltage can be less than 10. For circuits such as ADC that have high ripple requirements, the linear voltage regulator power supply solution has a very big advantage.
The circuit board is mainly composed of pads, vias, mounting holes, wires, components, connectors, filling, electrical boundaries, etc. The main functions of each component are as follows:
Pads: metal holes for welding component pins.
Vias: There are metal vias and non-metal vias, among which metal vias are used to connect component pins between layers.
Mounting holes: used to fix the circuit board.
Wire: electrical network copper film used to connect component pins.
Connectors: components used to connect between circuit boards.
Filling: copper plating for ground network, which can effectively reduce impedance.
Electrical boundary: used to determine the size of the circuit board. All components on the circuit board cannot exceed this boundary.
Siemens C98043-A1663-L44-09
Summary: The main components of Siemens S7-300PLC include rails, power modules, processing unit modules, interface modules, signal modules, function modules, etc. It is directly connected to the programmer PG, operator panel OP and other S7 PLCs through the interface of the MPI network.
Siemens C98043-A1663-L44-09
Working principle of the power board
Since LCD works at low voltage, and the general mains power provides 110V or 220V AC voltage, the display needs to be equipped with a power supply. The function of the power supply is to convert the 220V AC voltage of the mains into 12V or other low-voltage DC to power the LCD display. The power supply part of the LCD display uses a switching power supply. Because the switching power supply has the advantages of small size, light weight and high conversion efficiency, it is widely used in various electronic products, especially the pulse width modulation (PWM) type switching power supply. The characteristics of PWM switching power supply are fixed switching frequency and voltage regulation by changing the duty cycle of pulse width.
The basic working principle of PWM switching power supply is: the 220V AC input power supply is converted into 300V DC voltage through rectification and filtering, and then the high-frequency rectangular wave voltage is obtained by switching power tube control and high-frequency transformer step-down, and various DC output voltages required by the display are obtained after rectification and filtering. Pulse width modulator is the core of this type of switching power supply. It can generate a driving signal with fixed frequency and adjustable pulse width, control the duty cycle of the switch power tube, and adjust the output voltage to achieve the purpose of voltage stabilization.

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