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The servo motor can control the speed with accurate position. The voltage signal can be converted into torque and speed to drive the control object. The rotor speed of the servo motor is controlled by the input signal and can respond quickly. In the automatic control system, it is used as an executive element, and has the characteristics of small electromechanical time constant and high linearity. Servo motor is divided into DC and AC servo motor. Its main feature is that when the signal voltage is zero, there is no rotation phenomenon, and the speed decreases uniformly with the increase of torque. Now we will talk about using computer to control a DC servo motor.

What about DTU? DTU, data transfer unit. Data transfer unit offers complete, precise control of lighting and environmental controls from your computer. Using wireless communication, the DTU connects with all of your remote USB devices like lighting ballasts and temperature controls.

Three-phase asynchronous motor is a kind of induction motor, which is powered by a 380V three-phase AC current at the same time. Because the rotor and stator rotating magnetic fields of the three-phase asynchronous motor rotate in the same direction, the rotational speed is different, and there is a slip rate, so it is called a three-phase asynchronous motor. The rotor speed of an ATO three-phase asynchronous motor is lower than the speed of the rotating magnetic field. The rotor windings move relative to the magnetic field to generate electromotive force and current and interact with the magnetic field to generate electromagnetic torque to realize energy conversion.

The screw feeder plays an important role in production and life. Today, we will introduce its structural characteristics and main features of the screw feeder. We hope that after reading this article, you will have a better understanding of screw feeders.

A soft starter is an additional device that can be added to a typical AC electric motor that will allow the motor to use a different startup method. The purpose of this device is to reduce the strain put on the motor during the typical power-up phase of a motor. To accomplish this, a soft starter will slowly and gradually begin applying increasing voltages to the motor. This allows for a smooth acceleration of power instead of a sudden and violent burst of power that could potentially cause damage to the motor and the machine as a whole.

Laser is a major invention of the 20th century, known as "the fastest knife", "the most accurate ruler" and "the brightest light". The word "laser" is an acronym for "light amplification by stimulated emission of radiation", which describes the principles of how lasers are produced.

Servo lock is essentially a braking mode. When the servo motor driver selects the speed control mode, closed-loop position control cannot be performed. Therefore, the stop position of the servo motor is random, and there is no holding torque after stopping. At this time, If there is an external force (such as gravity) on the load, it may cause the servo motor to move and deviate from the stop point after it stops.

The PLC program interlocks the forward and reverses the rotation of the motor to prevent the wrong touch of the motor's reverse rotation button. PLC and the VFD are powered on for 2s time control. After the motor stops, it needs to wait for 10s before the motor can be restarted. This is very practical in practical applications (there is a good buffer process for motor inertial motion).

A slip ring is an electromechanical device that allows the transmission of power and electrical signals from a stationary to a rotating structure. A slip ring can be used in any electromechanical system that requires rotation while transmitting power or signals. It can improve mechanical performance, simplify system operation and eliminate damage-prone wires dangling from movable joints.They can be used on any rotating object to transfer power, control circuits, or analog or digital signals including data such as those found on aerodrome beacons, rotating tanks, power shovels.

Both voltage stabilizer and voltage regulator are power protection devices. The voltage regulator can adjust the required voltage according to the actual situation of the user. The voltage stabilizer can only stabilize the fluctuating and unstable voltage at the preset voltage value in the factory. Although both the voltage stabilizer and the voltage regulator change the voltage, but their functions are different. You could choose according to the actual situation.

A monitoring relay is a commonly used electromagnetic relay that is used for the voltage protection and control of the power drag system. The coil is connected to the main circuit in parallel to sense the line voltage of the main circuit; the contact is connected to the control circuit and is the executive element. According to the size of the pull-in voltage, voltage monitoring relays can be divided into over-voltage relays and under-voltage relays. ATO monitoring relay has a great many function, including overvoltage protection, undervoltage protection, voltage unbalance protection, phase failure protection and wrong phase protection.

Thermal label printer is that a semiconductor heating element is installed on the print head, and the print head can print out the required pattern after heating and contacting the thermal printing paper. Its principle is similar to that of a thermal fax machine. The image is created by heating the membrane to create a chemical reaction. This thermal label printer chemical reaction takes place at a certain temperature. High temperatures speed up the chemical reaction. When the temperature is below 60℃, it takes quite a long time, even years, for paper to become dark. At 200℃, the reaction takes place in a matter of microseconds.

A solenoid valve is an on/ off electromechanically operated valve which consists of an electromagnetic actuator (solenoid) and a valve body. The solenoid-plunger assembly is the valve actuator responsible for opening and closing the valve. This actuator can be arranged in such a way that the plunger action can either open or close only. There is no intermediate, or in-between position, so there is no way for a solenoid to throttle flow. The valve body consists of the pressure containing parts in-contact with the process fluid.

The DC servo motor has many advantages, including low cost, simple structure, large starting torque, wide speed regulation range and easy control. It is easy to maintain (replacement of carbon brushes) and it has requirements for the environment. Therefore, it can be used in general industrial and civil occasions. Next we'll look at how to control DC servo motor speed with analog.

Stepper motor is an open-loop control motor that divides a full rotation into a number of equal steps. The motor's position can be controlled to move and hold at one of these equal steps. Stepper motors come in many different sizes and styles, and they are widely used in a variety of automated control systems.

The reactor has the function of passing DC and resisting AC in the circuit. When an unsteady current flows through a conductor, a changing magnetic field will be generated, which will in turn affect the current, so any conductor will have a self-inductance phenomenon. Reactors are widely used in the system. Based on years of operating experience, the author introduces several common faults and their solutions.

An oscilloscope is a very versatile electronic measuring instrument. It can transform invisible electrical signals into visible images, which is convenient for people to study the changing process of various electrical phenomena.Today we will introduce the features and applications of oscilloscopes. We hope that after reading, you can know the usage of oscilloscope.

Centrifuge machines can be categorized into industrial centrifuges and experimental centrifuges. Experimental centrifuges are divided into preparative centrifuges and analytical centrifuges. Preparative centrifuges are mainly used to separate various biological materials. The sample capacity of each separation is relatively large. Analytical centrifuges generally have optical systems. It is mainly used to study the physical and chemical properties of pure biological macromolecules and particles. According to the behavior of the substance to be tested in the centrifugal field (continuously monitored by the optical system in the centrifuge), the purity, shape and molecular weight of the substance can be inferred. Analytical centrifuges are all ultracentrifuges.

A push-button switch is an electrical appliance that is used to connect and disconnect small current circuits that is pressed to act and released to reset. It  is generally used in control circuits with AC and DC voltages below 440V and currents less than 5A. Generally, it does not directly manipulate the main  circuit, but can also be used in interconnecting circuits.

A gas detector is a kind of instrumentation tool for gas leakage concentration detection, including a portable gas detector, hand-held gas detector, fixed gas detector, online gas detector, etc. They mainly use gas sensors to detect the types of gases present in the environment. Gas sensors are sensors used to detect the composition and content of gases.