News - What is the production difference between high efficiency motor and ordinary motor

What is the production difference between high efficiency motor and ordinary motor production

Ordinary motor: the motor is to convert electrical energy into mechanical energy device, the electric energy absorbed by the motor is 70%-95% into mechanical energy, which is often said that the efficiency of the motor value, it is an important technical indicator of the motor, the remaining 30%-5% part of the motor itself due to heat, mechanical loss and other consumption, so this part of the electric energy is wasted.

For ordinary motors, every 1 percent increasing in efficiency is not easy, the material will increase a lot, and when the motor efficiency reaches a certain value, no matter how much material add,it can not be improved. Most of them are three-phase asynchronous motor replacement products, that is, the basic working principle has not changed.

Motor mainly through the following ways to improve the efficiency of the motor.

1.Increase the material: increase the outer diameter of the core, increase the length of the core, increase the size of the stator slot, increase the weight of the copper wire to achieve the purpose, such as: Y2-8024 motor will increase the outer diameter from the current Φ120 to Φ130, some foreign countries increase Φ145, while the length from 70 to 90. The amount of iron used in each motor is increased by 3Kg. The copper wire is increased by 0.9Kg.

2. The use of silicon steel sheet with good magnetic permeability, hot rolled sheet with large iron loss in the past, now use cold rolled sheet with low loss, such as DW470. Even lower DW270.

3, improve processing accuracy, reduce mechanical loss replace small fan to reduce fan loss using bearings.

4. Optimize the electrical performance parameters of the motor, and optimize the parameters by changing the groove shape.

5, the use of cast copper rotor (complex process, high cost).

Energy-saving measures

Motor energy saving is a systematic engineering, involving the whole life cycle of the motor, from the design and manufacture of the motor to the selection of the motor, operation, adjustment, maintenance, scrap, to consider the effect of its energy-saving measures from the whole life cycle of the motor.

The design of energy-saving motor refers to the use of optimization design technology, new material technology, control technology, integration technology, test and detection technology and other modern design means to reduce the power loss of the motor and improve the efficiency of the motor.

When the motor converts electrical energy into mechanical energy, it also loses some energy itself, and the typical AC motor loss can be generally divided into three parts: fixed loss, variable loss and stray loss. Variable loss varies with load, including stator resistance loss (copper loss), rotor resistance loss and brush resistance loss; Fixed losses are load independent and include core losses and mechanical losses. The iron loss is also composed of hysteresis loss and eddy current loss, which is proportional to the square of voltage, and the hysteresis loss is inversely proportional to the frequency. Other stray losses are mechanical losses and other losses, including the friction loss of bearings and the wind resistance loss caused by rotation of fans, rotors, etc.

1.Save energy, reduce long-term operating costs, very suitable for textile, fan, pump, compressor use, by saving electricity one year can recover the motor acquisition cost;

2.Direct start, or use frequency converter speed regulation, can be replaced asynchronous motor;

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

4. The motor power factor is close to 1, improve the power grid quality factor, no need to add power factor compensator;

5. The motor current is small, save power transmission and distribution capacity, extend the overall operating life of the system;

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

advantage

˙ Direct start, replace asynchronous motor.

· Rare earth permanent magnet energy-saving motor itself can save more than 3% of electric energy than ordinary motors.

Motor power factor is generally higher than 0.90, improve the quality factor of the power grid, no need to add power factor compensator.

• Small motor current, save power transmission and distribution capacity, extend the overall operating life of the system.

˙ Plus drive can achieve soft start, soft stop, stepless speed regulation, power saving effect further improved.

Characteristic

1, save energy, reduce long-term operating costs, very suitable for textile, fan, pump, compressor use, by saving electricity one year can recover the motor acquisition cost;

2, direct start, or use frequency converter speed regulation, can be replaced asynchronous motor;

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

4, the motor power factor is close to 1, improve the power grid quality factor, no need to add power factor compensator;

5, the motor current is small, save power transmission and distribution capacity, extend the overall operating life of the system;

6, power saving budget: Taking 55 kilowatt motor as an example, the motor saves 15% of electricity than the general motor, and the electricity fee is calculated by 0.5 yuan per degree, and the cost of replacing the motor can be recovered by saving electricity within a year using the energy-saving motor.