Introduction
The chemical and pharmaceutical industries are the largest power consumers in today's industrial enterprises, and the degree of dependence on natural resources accounts for more than 60%. The energy problem is a serious challenge. There are two ways to fundamentally solve the energy problem: one is open source, and the other is energy saving . The frequency conversion energy-saving technology of D32 series inverter is a high-efficiency energy-saving new technology with wide application, quick effect and short investment payback period. Common agitators in the chemical and pharmaceutical industries have been widely used.
Features
D32 is a wall-mounted inverter, the power range is 0.75KW-500KW, the voltage level of the incoming line voltage is 380V-480V, and the control method is vector control without speed sensor. D32 has a wealth of substations, including 8 digital inputs (LI1-LI8), 2 analog inputs (AI), 2 relay outputs (TA), 2 analog outputs (AO), 5V auxiliary power supply for analog power supply Fixed input, 24V auxiliary power supply for digital input All LI/TA, AI/AO can be freely programmed to define functions. MODBUS interface is standard configuration of D32, no option is required. D32 can be connected to higher-level automation systems via MODBUS.
Advantage：
Provide 250% of the rated current of the motor during low frequency operation and acceleration to meet the requirements of mixer operation;
Superior AVR function, super grid adaptability, guarantee output voltage, current and speed stability;
With excellent speed control accuracy, the control accuracy is 0.2%, and accurate speed control is realized;
Excellent current limiting characteristics, strong overload capacity, can effectively reduce frequency conversion overload, overcurrent protection, and maximize production continuity;
It has the advantage of fast torque response, and when the load fluctuates, the current fluctuation is small;
Strong environmental adaptability, completely independent air duct design can greatly improve the resistance to harsh environments such as oil pollution, dust and humidity;
It has good overload capacity and environmental adaptability, and has high operational reliability;
System Introduction：
In this system, a D32 7.5KW inverter drives the 7.5KW mixer motor, drives the stirring fan blades to stir, and then stirs evenly through the vacuum valve, and then sends it to the feed pump to participate in the next chemical reaction after meeting the requirements. The start/stop operation of the frequency converter is realized through the field operation column, and the frequency converter feeds back the actual value of the motor speed to the DCS, and the operator measures the signal and the actual speed value according to the instrument of the mixing tank. Issue a command to the frequency converter to increase or decrease the motor speed reference.
Technical Parameter
| Inverter technical parameters | Device configuration | |
 Model: D32 | Output current: 17A | D32 inverter |
| Input voltage: 3-phase, 380-480V | Frequency range: 0-400Hz | 7.5kW Blender |
| Input frequency: 50/60Hz ±5% | Overload capacity: 150%, 60 seconds | DCS signal feedback system |
| Output power: 7.5KW | Ambient temperature: -10-40°C | |
| Output voltage: 0-480V (the maximum value is determined by the input voltage) | Protection level: IP20 | |
On Site Usage：
According to the on-site space situation, a D32 series inverter is installed in the control cabinet, and the inverter installation and on-site motor are as shown in the figure:
Running Result：
The mixer control system using the D32 frequency converter has been in operation for more than three years and has achieved good economic results
Benefits and Social Benefits:
The control device operates reliably, has good environmental adaptability, can resist harsh environments such as oil pollution, dust and damp heat, and has a low failure rate;
Excellent current limiting characteristics, strong overload capacity, can effectively reduce frequency conversion overload, overcurrent protection, and maximize production continuity;
The economic benefits are significant, and the entire investment increased by the frequency conversion control system can be recovered in more than one year;
Customer Benefits：
Reliable operation and small maintenance, saving maintenance costs;
The comprehensive protection function of the frequency converter ensures maximum production continuity;
The economic benefits are significant, and the entire investment increased by the frequency conversion control system can be recovered in more than one year;