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What is the difference between a chemical pump ordinary motor and an efficient motor?
浏览次数: Time: 2019-09-25 13:03
Motors are an indispensable part of chemical production, chemical pumps, centrifugal pumps, magnetic pumps, equipment rotation, electric machinery commonly used in daily life production. When we use motors, we often hear high-efficiency and energy-saving motors. So what is a high-efficiency motor, What exactly
Motors are an indispensable part of chemical production, chemical pumps , centrifugal pumps , magnetic pumps , equipment rotation, electric machinery commonly used in daily life production. When we use motors, we often hear high-efficiency and energy-saving motors. So what is a high-efficiency motor, What is different and what are the differences?
High-efficiency motor: A motor with a higher power utilization rate is called a high-efficiency motor, referred to as "high-efficiency motor".
Ordinary motor: The motor is a device that converts electrical energy into mechanical energy. 70% -95% of the electrical energy absorbed by the motor is converted into mechanical energy. This is often referred to as the efficiency value of the motor. It is an important technical indicator of the motor, and the remaining 30%- 5% is consumed by the motor itself due to heat and mechanical losses, so this part of the power is wasted.
The motor is an electric machine commonly used in chemical production, water pump assembly, equipment rotation, and daily life production. When we use the motor, we often hear high-efficiency energy-saving motors. So what is an efficient motor? What are the differences and what are the differences? ?
High-efficiency motor: A motor with a higher power utilization rate is called a high-efficiency motor, referred to as "high-efficiency motor".
Ordinary motor: The motor is a device that converts electrical energy into mechanical energy. 70% -95% of the electrical energy absorbed by the motor is converted into mechanical energy. This is often referred to as the efficiency value of the motor. It is an important technical indicator of the motor, and the remaining 30%- 5% is consumed by the motor itself due to heat and mechanical losses, so this part of the power is wasted.
Third, the advantages of efficient motors
1. Direct start, full replacement of asynchronous motor.
2. 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. Rare-earth permanent magnet high-efficiency energy-saving motors can save more than 3% of electric energy compared with ordinary motors.
3. The motor current is small, saving transmission and distribution capacity, and extending the overall operating life of the system.
4. Adding the driver can realize soft start, soft stop and stepless speed regulation, and the power saving effect is further improved.
Fourth, energy-saving measures for high-efficiency motors
Motor energy saving is a systematic project that involves the entire life cycle of the motor. From the design and manufacture of the motor to the selection, operation, adjustment, maintenance, and retirement of the motor, the effect of energy saving measures must be considered from the entire life cycle of the motor. In this regard, the main considerations are to improve efficiency in the following aspects. The design of energy-saving motors refers to the use of modern design methods such as optimization design technology, new material technology, control technology, integration technology, and testing technology to reduce the power loss of the motor, improve the efficiency of the motor, and design an efficient motor.
When the electric motor converts electrical energy into mechanical energy, it also loses some energy. Typical AC motor losses 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 loss has nothing to do with load, including core loss and mechanical loss. 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, rotor Wait for wind resistance loss due to rotation.
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