What Is The Main Advantage Of High Efficiency Motor?

Advantages of high-efficiency motors:

●Direct start, the asynchronous motor can be completely replaced.

●The rare earth permanent magnet high-efficiency energy-saving motor itself can save more than 3% of electric energy than ordinary motors.

●The power factor of the motor is generally higher than 0.90, which improves the quality factor of the power grid without adding a power factor compensator.

●The motor current is small, which saves the transmission and distribution capacity and prolongs the overall operating life of the system.

●Adding a driver can realize soft start, soft stop, and stepless speed regulation, and the power saving effect is further improved.

Energy-saving measures for high-efficiency motors:

Motor energy saving is a systematic project involving the entire life cycle of the motor. From the design and manufacture of the motor to the selection, operation, adjustment, maintenance and scrapping of the motor, the effect of its energy-saving measures must be considered throughout the entire life cycle of the motor. In this aspect, the main consideration is to improve the efficiency from the following aspects.

The design of an energy-saving motor refers to the use of modern design methods such as optimization design technology, new material technology, control technology, integration technology, test and detection technology, etc., to reduce the power loss of the motor, improve the efficiency of the motor, and design an efficient motor.

When the motor converts electrical energy into mechanical energy, it also loses a part of the energy itself. Typical AC motor losses can generally be divided into three parts: fixed loss, variable loss and stray loss. Variable losses are load-dependent and include stator resistance losses (copper losses), rotor resistance losses, and brush resistance losses; fixed losses are load-independent and include core losses and mechanical losses.

The iron loss is composed of hysteresis loss and eddy current loss, which is proportional to the square of the voltage, and the hysteresis loss is also inversely proportional to the frequency; other stray losses are mechanical losses and other losses, including friction losses of bearings and fans, rotors and other windage losses due to rotation.

Features of high-efficiency motors:

1. Save energy and reduce long-term operating costs. It is very suitable for textiles, fans, pumps, and compressors. The cost of motor purchase can be recovered by saving electricity for one year;

2. Direct start or speed regulation with frequency converter can fully replace the asynchronous motor;

3. The rare earth permanent magnet high-efficiency energy-saving motor itself can save more than 15℅ of electric energy than ordinary motors;

4. The power factor of the motor is close to 1, which improves the quality factor of the power grid without adding a power factor compensator;

5. The motor current is small, which saves the transmission and distribution capacity and prolongs the overall operating life of the system;

6. Power-saving budget: Take a 55-kilowatt motor as an example, a high-efficiency motor saves 15% of electricity than a general motor, and the electricity fee is calculated at 0.5 yuan per kilowatt-hour. The cost of replacing the motor can be recovered by saving electricity within one year of using the energy-saving motor.