I. Introduction:

 

Dust collector or dust removal equipment is a device that separates dust from flue gas. The bag filter, also known as filter dust collector, is a kind of dry high efficiency dust collector. It is a dust removal device that uses a bag filter element made of fiber woven material to trap solid particles in dust-containing gas. The principle of action is that dust particles are intercepted by collision with the fibers due to inertial force when they wind around the filter cloth fibers. In the pulse and air box pulse dust collector, the dust is attached to the outer surface of the filter bag. When the dust-containing gas passes through the dust collector, the dust is trapped on the outer surface of the filter bag, and the clean gas enters the filter bag through the filter material. The cage inside the filter bag is used to support the filter bag and prevent the filter bag from collapsing. At the same time, it helps to remove and redistribute the dust cake. The fabric and design of the dust bag should strive for high-efficiency filtration, easy dust peeling and durable effects. The selection of the dust bag is very important, it directly affects the dust removal effect of the dust collector. Choose the dust bag from the following aspects: gas temperature, humidity and chemistry, particle size, dust concentration, filter wind speed, cleaning Factors such as dust method.

 

2. Analysis of the advantages of using easy-drive frequency converter in dust collector

 

1. The frequency conversion technology can effectively control the speed of the motor, and has the advantages of wide speed adjustment range, high speed adjustment accuracy, and fast dynamic response; 　　

 

●Adjustable operating speed: The frequency conversion technology adjusts the output voltage proportionally while adjusting the output frequency, thereby changing the motor speed and realizing stepless speed regulation;

 

●Acceleration controllable: variable frequency speed regulation can be started at zero speed, and correspondingly accelerated according to demand, acceleration curve can be selected according to design requirements;

 

●Using microcomputer control technology to control the frequency converter, it can realize a variety of transmission speed regulation functions: various frequency setting and execution, starting, operation mode selection, torque control setting and operation, acceleration and deceleration design and operation, braking Mode setting and execution make the frequency conversion technology more intelligent, and the application field is broader.

 

2. The protection function of frequency conversion technology is relatively complete, which can effectively control the protection and monitoring of the motor, the life of mechanical parts, and the current and voltage fluctuations of the power grid;

 

In terms of the loss of mechanical parts, the selection of the motor stop mode (deceleration stop, free stop, deceleration stop and DC braking, etc.) of the frequency conversion speed regulation can reduce the impact of the motor and its linked mechanical parts; dynamically adjust the torque limit to avoid mechanical Does not reduce damage.　　 　　 3. Frequency conversion technology has significant advantages in energy saving and maintenance.

 

First, the frequency conversion technology realizes soft start with low starting current. The power of the motor is proportional to the product of current and voltage, and the power consumed by the motor directly started by the industrial frequency will be much higher than the power required for variable frequency start;

 

Second, the variable frequency speed control motor operates at a low slip rate, which reduces the loss of the motor itself and has high working efficiency. At the same time, as application requirements change, the frequency conversion speed regulation system can quickly and dynamically adjust the speed to minimize power consumption.

 

3. Features of Easy Drive CV3100 Inverter

 

1. V/F control mode (one drag multiple can be realized)

 

A. Advanced vector control algorithm, optimized SVPWM output, low output harmonics and small motor temperature rise.

 

B. Realize optimal energy-saving operation through motor parameter detection.

 

2. Open loop vector control (SVC) mode

 

A. Using TI special DSP processor for high-speed motor control, it can complete complex vector calculations at high speed and accurately to achieve complete decoupling of the motor.

 

B. Using advanced motor model algorithm, 0.5Hz can output 150% rated torque, stable speed accuracy 0.5%, speed regulation range 1:100.

 

3. Standard RS485 interface, support MODBUS communication protocol, and can communicate with host computer such as touch screen, PLC, etc.

 

4. Complete protection measures

 

It can realize the protection of nearly 20 kinds of faults such as overvoltage, undervoltage, input phase loss, output phase loss, overload, overheating, overcurrent, external terminal failure, communication failure, current detection error, motor tuning failure, etc., with higher reliability.

 

Fourth, the scene picture of the easy drive CV3100 series inverter used in the dust collector