Motor is a kind of energy conversion machinery. In the process of energy conversion, losses will inevitably occur. No matter what form these losses take, they will eventually disappear in the form of heat energy. Such as copper loss, iron loss, mechanical loss, etc. Finally, the motor heats up. Therefore, for the same kind of motor, the greater the loss, the more serious the heating, the higher the temperature rise and the lower the efficiency.

Motor is the main power-consuming equipment of enterprises, especially high-voltage and high-power equipment, most of which have energy-saving potential. At present, the method that most enterprises will take is to adopt the "motor intelligent power saving technology" of Zhongke Yujie. This technology is mainly based on high voltage variable frequency speed regulation. High-voltage frequency conversion adopts power unit series technology, and directly outputs 6kV and 10kV voltages. Because the series connection of power units replaces the direct series connection of power devices, the problem of device voltage resistance is solved. The main control part adopts the control mode of DSP+FPGA (Field Programmable Gate Array) +PLC large-scale high-speed integrated digital circuit, which can realize real-time and accurate motor control at high speed and achieve the goal of giving consideration to both high performance and high reliability. The core control algorithm adopts space vector PWM control algorithm, which effectively improves the utilization rate of DC voltage. FPGA realizes the pulse distribution algorithm of power unit, and drives the power output of power unit and all units quickly in real time. It has advanced supporting facilities and precise modern control system. It can make the high-voltage motor run in the best state, reduce energy consumption and improve motor efficiency.

The performance features of "Intelligent Power Saving System for Motor" include:

(1) Electrical logic control is realized by PLC, which has good stability and expansibility. As the interface between high-voltage components and external signals, it can give full play to its advantages of high reliability and rich interfaces, provide rich input and output nodes for field operation, and flexibly change the control logic and control mode according to the actual situation.

(2) The power device adopts IGBT direct drive mode, which is simple and reliable. IGBT adopts high-voltage traction device, which has high temperature resistance and high voltage margin.

The main application scope of the system includes:

Thermal power generation: induced draft fan, blower, feed pump, circulating pump, condensate pump, compressor, mortar pump, etc.

Metallurgical mines: induced draft fan, ventilator, dust removal fan, mud pump, descaling pump, centrifugal feed pump, etc.

Petrochemical industry: induced draft fans, gas compressors, water injection pumps, submersible pumps, main pipeline pumps, boiler feed pumps, salt water pumps, mixers, extruders, etc.

Cement manufacturing: kiln induced draft fan, raw meal grinding induced draft fan, booster fan, main dust suction fan, cooler dust suction fan, cooler exhaust fan, preheating tower fan, sorter fan, kiln air supply fan, etc. Water supply and sewage treatment: sewage pump, fresh water pump, purification pump, biological rough treatment tower pump, oxygen blower, etc.

Others: energy-saving transformation of motor systems such as transmission mechanism, wind turbine and wind tunnel.