NEC IC Integrated Circuit C4558C

03/01/2021

The main difference between brushless DC motor and DC servo motor

Different definitions: (1) Brushless DC motor is a typical mechatronics product, which is composed of motor body and driver. Brushless motor refers to the motor without brush and commutator (or collector ring), also known as commutator less motor. As early as the 19th century, when the motor was born, the practical motor was the brushless form, that is, the AC squirrel cage asynchronous motor, which has been widely used. However, the asynchronous motor has many insurmountable defects, so that the development of motor technology is slow. The transistor was born in the middle of last century, so the brushless DC motor using transistor commutation circuit instead of brush and commutator came into being. This new type of brushless motor is called electronic commutation DC motor, which overcomes the defects of the first generation of brushless motor.

08/21/2020

What are the hazards caused by the air entering the condenser of the freezer

The handling of water-cooled chiller failures must strictly follow scientific procedures. The chiller operator should not act without authorization and disassemble the water-cooled chiller at will when the situation is unclear,

09/11/2020

Discussion on the Key Technology of DC Inverter Air Conditioner Control

Inverter air conditioners have become a hot spot for the development of air-conditioning companies because of their energy-saving, comfortable, and high-energy-efficiency advantages and conform to the national policy of "energy saving and emission reduction".

06/29/2020

Suggestions for troubleshooting of compressor with liquid start

06/14/2020

Compressor common fault handling

Compressor common fault handling Foam when starting with liquid When the air-cooled compressor is started, the phenomenon that the lubricating oil in the crankcase blisters violently is called liquid start. The basic reason for starting with liquid is 器2䀀
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06/14/2020

Technical status and development trend of refrigeration and air-conditioning compressors

Refrigeration machinery and air conditioning equipment play a very important role in the development of the national economy, the improvement of people's lives and the support of national defense equipment.

08/31/2020

Brief Discussion on Recruitment of Talents for Air Compressor System Energy Saving Service

Not long ago, in the article "Analysis of Talent Demand in Air Compressor System Energy-saving Service Industry", the author only briefly analyzed the ability of technical, business, and marketing talents in the air compressor system energy-saving service industry

08/14/2020

Precautions for refrigeration piping

The refrigeration industry is now in a period of rapid development. In order to facilitate the refrigeration installation of refrigeration equipment, here is the refrigeration equipment manufacturer to share with you the successful experience accumulated by our technicians.

06/14/2020

What are the advantages and disadvantages of central air conditioning?

1. It is better to use a central air conditioner ① Split machine and multi-connection Before chatting, first understand the two basic concepts of air conditioning, split machine and multi-line. The split machine is our common common air conditioner. 器2䀀
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08/19/2020

Eight installation steps of central air conditioning

The installation and purchase of central air conditioners are equally important. Central air conditioners have good materials and without good construction techniques, which will also affect the use of air conditioners