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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.

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.

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 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.

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.

Computer Numerical Control (CNC) routers are a class of machine shop equipment used to remove material from specific locations on wood or metal. Since each material has different advantages and disadvantages, there are different types of CNC milling machines. Computer numerical control refers to computer programming used to control and program routers. CNC routers are used to create patterns or cuts as needed. Industrial CNC routers used in factory settings are much more expensive than hobbyist models. CNC routers are attached to a table and programmed to remove material in a specific pattern or shape from a piece of wood or metal. The engraving machine is usually connected to a three-speed or four-speed motor system.

The limit switch is a commonly used small current master electrical appliance. It utilizes the collision of the moving parts of the production machinery to make or break the control circuit to achieve certain control purposes. Usually, this ATO limit switch is used to limit the position or stroke of mechanical movement, so that the moving machinery can automatically stop, reverse movement, variable speed movement or automatic round-trip movement according to a certain position or stroke.

This is because the structure of the inverter is AC-DC-AC. Whether single-phase 220V or three-phase 380V, the input AC power must first pass through a three phase rectifier bridge or a single-phase rectifier bridge to convert the AC power into DC power, and then use the point The capacitor filter is removed, and  it becomes a DC power supply with relatively flat ripples. Next, the three-phase bridge-type urinal controlled by the chip converts the DC power supply into a three-phase AC power supply whose frequency and voltage can be controlled arbitrarily.

A pressure sensor is a device that can sense the pressure signal and convert the pressure signal into a usable output electrical signal according to a certain law. It usually consists of a pressure-sensitive element and a signal processing unit. According to different test pressure types, pressure sensors can be divided into gauge pressure sensors, differential pressure sensors, and absolute pressure sensors. ATO pressure sensor is the most commonly used sensor in the industry. It is widely used in various industrial automation environments, involving water conservancy and hydropower, railway transportation, intelligent buildings, production automation, aerospace, military, petrochemical, oil wells, electricity, ships, machine tools, pipeline and many other industries.

VFD is generally a power control device that converts a power frequency power supply into another frequency by using the on-off function of power semiconductor devices. The main circuit of the variable frequency drive can be roughly divided into two categories: the voltage type is a frequency converter that converts the DC of the voltage source into an AC, the filter of the DC circuit is a capacitor; the current type is a frequency converter that converts the DC of the current source into an AC, its DC loop filter is inductance.The following ATO will introduce you how to set 120V to 220V VFD panel

Data transfer unit is abbreviated as DTU, is a wireless data acquisition device specially used to convert serial port data to IP data or convert IP data to serial port data. It is transmitted through a wireless communication network. Today we are going to carry ou wireless control, between computer and varible frequency drive via to different model of DTU. This is varible frequency drive.

Three-phase unbalance refers to the inconsistency of the three-phase current (or voltage) amplitudes in the power system, and the amplitude difference exceeds the specified range. Due to the unbalanced load added by each phase power supply, it belongs to the fundamental wave load configuration problem. The occurrence of three-phase unbalance is related to the user's load characteristics, as well as the planning and load distribution of the power system. This article will introduce the method to solve the three-phase unbalance.

In addition to panel control and terminal control, we can also use the RS485 interface (Modbus RTU protocol) for remote control of ATO’s variable frequency drives. RS485 interface is quite useful for the centralized control and monitoring of equipment. This type of control plays an indispensable part in automatic industrial control. That's why we write this blog to illustrate how we can use the Modbus RTU protocol to control the VFD.

Can a three-phase 220V-240V motor work with a single-phase 220V supply? ATO single-phase VFD can do it. It can convert 1-phase 220V-240V into 3-phase to supply power to a three-phase motor, and can also reduce the inrush current when the motor starts.

Interlocking in general is called protocol action. It means defined bunch action to be taken when certain conditions occur. In a view of PLC, Interlocking is an action that is defined in the PLC program to control the process when certain conditions occur f.e. temprature exceeding its limit, flow below requirement or any parameter exceeding beyond its safe operating limits.
Do you know how to program the PLC interlocking program? Follwing the steps below and you will program it quickly.