Inverter cabinets and control cabinets are commonly used equipment in the field of industrial automation, and they have certain differences in function and use. This article will introduce the differences between inverter cabinets and control cabinets in detail to help readers better understand these two types of equipment.
1. Frequency conversion cabinet.
A frequency conversion cabinet is a device specially used for power conversion, which controls the speed of an electric motor by changing the frequency of the power supply. The main function of the inverter cabinet is to realize the soft start, speed regulation and braking of the motor, and at the same time, it can also carry out overload protection, short circuit protection, undervoltage protection and other protection measures for the motor. The advantage of the inverter cabinet is that it can accurately control the speed of the motor, and has the advantages of energy saving, high efficiency and environmental protection.
The inverter cabinet is mainly composed of inverter, input and output power supply, reactor, filter, braking unit, etc. Among them, the inverter is the core component of the inverter cabinet, which can convert the input alternating current into direct current, and then convert the direct current into alternating current, so as to realize the speed control of the motor. There are many control modes of inverter, including V F control, vector control, direct torque control, etc., and different control methods are suitable for different application scenarios.
Second, the control cabinet.
A control cabinet is a device specially used for power control, which can control the on-off state of the circuit according to a preset program or instruction. The main function of the control cabinet is to realize the switch control, sequence control, remote control and so on of the circuit, and at the same time, it can also carry out overload protection, short circuit protection and other protection measures for the circuit. The advantage of the control cabinet is that it can realize automatic control, improve production efficiency and management level.
The control cabinet is mainly composed of circuit breakers, contactors, relays, buttons, indicator lights, etc. Among them, the circuit breaker is one of the core components of the control cabinet, which can turn on and off the circuit, so as to realize the control of the circuit. A contactor is also a commonly used control element, which can be energized by the coil and then engages the main contact, so as to turn the circuit on or off. A relay is a control element used for signal transmission, which can control the on-off state of a circuit by inducing signals. Push buttons and indicators are commonly used operating and display elements in control cabinets, which can be used for manual operation and display of the working status of circuits.
3. Differences. The difference between the inverter cabinet and the control cabinet is mainly reflected in the following aspects:
1.The functions are different: the inverter cabinet is mainly used for power conversion, while the control cabinet is mainly used for power control. The frequency conversion cabinet mainly controls the speed of the motor by changing the power supply frequency, while the control cabinet mainly controls the on-off state of the circuit according to the preset program or instruction.
2.The composition is different: the frequency conversion cabinet is mainly composed of frequency converter, input and output power supply, reactor, filter, braking unit, etc., while the control cabinet is mainly composed of circuit breaker, contactor, relay, button, indicator light, etc.
3.Different application scenarios: inverter cabinets are mainly used in occasions that require power conversion, such as power transmission and distribution, energy-saving transformation, etc., while control cabinets are mainly used in occasions that require power control, such as industrial automation, building automation, etc.
4.The operation mode is different: the operation mode of the inverter cabinet is mainly through keyboard operation or remote PLC control, etc., while the operation mode of the control cabinet is mainly through manual operation or remote PLC control.
In short, there are certain differences between the inverter cabinet and the control cabinet in terms of function, composition and application scenarios, but they are both indispensable equipment in the field of industrial automation. Choosing the right equipment and the right way of operation can improve production efficiency and management level, and also ensure the safe and stable operation of equipment.