Learn about Motor drivers

Learn about Motor drivers

Once the driving force of the industrial Revolution, the electric motor remains highly relevant today as a force for technological development. Motor drives are versatile and can be used for many purposes, and whether we realize it or not, it affects many aspects of our lives.

Speed regulating motor driver

Adjustable speed motor drivers are used to control the speed of machinery and are found in many industrial applications, including assembly lines. There are usually several preset speed ranges to choose from, and they come in four basic types:

machine

The mechanically adjustable motor drive allows adjustment of the pitch diameter on one or both pulley wheels. A traction drive (a type of mechanical drive) uses a metal roller to transmit power, and its speed can be adjusted by changing the position of the roller to change the diameter of the contact between them. Rollers come in many shapes and designs and can be used for a variety of purposes.

Electromechanical type

These drives are mechanically tuned or automatically controlled and contain both mechanical and electrical components, making them useful hybrid devices.

Hydraulic type

Hydraulic drivers are divided into three main types, hydraulic drivers rely on hydraulic pumps and electric motors or oil to transfer torque. Hydrostratic drives transfer torque by controlling the flow of fluid with a control valve while regulating its speed through a hydrodynamic drive (also known as a hydraulic coupling) from a rotor impeller or by utilizing oil.

These drives are most often seen as torque converters in cars. Finally, the hydraulic viscous drive consists of one or more disks connected to the input shaft and pressed against one or more disks on the output shaft. A thin film of oil is used between discs to transfer torque and protect the discs from damage.

corpuscle

Electronic drivers can be controlled manually or automatically, including DC motor drivers, eddy current drivers, and AC motor drivers. They usually contain both a speed control unit and an electric motor, and are used for many purposes.

Variable frequency and variable torque motor drivers

Because variable speed drives are not limited to a preset range, they generally allow more control over their precise speed than variable speed drives. These drivers are used in many electromechanical systems, from small equipment to mine drives, to control the speed and torque of electric motors. In fact, this type of electric motor used in many industrial applications consumes 25% of the world's electricity!

The three main types of variable torque and power systems include: variable torque, commonly used in centrifugal fan, pump and blower systems; Constant torque, commonly seen in conveyor and positive displacement pump applications; And constant power, which is most often used in the form of power tools and traction applications.

Soft start motor drive

Soft starters are used on AC motors to reduce stress and damage to mechanical and electrical systems during start-up.

During start-up, the surge current can reach a level seven times higher than the standard operating current, while the starting torque can reach a level three times higher than the average. This causes sudden stress on the system, which shortens the service life and causes power loss. By using soft start drivers, this pressure can be eliminated, effectively extending the service life of the device.