Among a large number of electronic devices, frequency converters attract attention. These technical devices are specially designed to convert network parameters into output currents over a wide frequency range. A feature of modern inverters is the conversion of a wide frequency band.

What is a frequency converter

Modern frequency response converters are designed to vary the incoming current, which has a standard frequency in alternating current increased frequency characteristics.
Manufacturing companies specializing in the production of such devices offer two types of converters that differ in design features:

• equipped with a motor, operating in asynchronous mode, supplemented by a rotor functioning as a generator;
• devices of electronic type of action.

Altivar 71 frequency converters are among the electronic type of action that are required to control the operation of the motor, regardless of the typology. The desired action is achieved by creating an output current with a specific frequency response. Most simple converters operate on the principle of voltage divided by current frequency. Such advanced models use the principle of vector control in their work.

Structurally, the Altivar 71 frequency converter consists of a rectifier, which is used to convert industrial frequency currents into direct currents, an inverter or converter used to create the required frequency and amplitude of variable current indicators. Also inside are the transistors needed to provide the correct amount of current used to power the electric motor.

Sometimes, in order to increase the resulting output voltage and power inside the converter, a choke is mounted in the area up to the engine. Reducing the impact of factors causing interference generated by the electromagnetic field can be achieved through the use of an EMC filter.

Altivar series frequency converters, designed to "subjugate the current" through the use of a vector control system, having asynchronous type, serve to adjust the speed of motors or convert the current of systems operating in a synchronous circuit, with sinusoidal EMF to control speed characteristics.

The ATV 71 series of frequency converters includes several models that are used depending on the current strength and the number of phases:

1. the purpose of the use of which is to create the possibility of control for single-phase voltage systems with a power of 240 volts and a frequency of 50 Hz;
2. used in systems having three phase power supply with a power of 200-240 volts and a frequency response of 50 Hz;
3. designed to operate in systems with a three-phase voltage of 380 volts and a standard frequency of 50 Hz.

The use of these devices allows solving complex problems, including improving the performance of engines when operating in conditions of increased power. These include:

• functions aimed at improving the dynamic characteristics of systems with vector control, created in various systems;
• expanding the range of frequencies obtained at the output, on which engines operate at high speeds;
• parallelization of the engine switching system and the use of directional drives;
• increasing the accuracy of maintaining the characteristics of the equipment during its operation, which helps to reduce the amount of electricity consumed, especially in the case of synchronous motors;
• improving the smoothness of control of mechanisms that do not have a balanced system by creating an adaptive scheme for normalizing power characteristics.

Increasing the power of the supplied current to the level of 600 volts allows you to increase the functions of the atv71 frequency converters, in particular, increase the productivity and flexibility of the use of mechanized devices, expanding the range of applications:

• use in hoisting and transport vehicles, namely, improving the quality of control of the brake system, limit switches;
• filling and packaging equipment, when using converters, it is possible to achieve a decrease in the minimum reaction time, simplification of the positioning system for limit switches, control over the existing built-in bus;
• textile machines, which receive improvements in terms of accuracy, control function, contouring with increased performance;
• woodworking machines. The use of converters allows you to increase the output frequency of the current, which can reach 1600 Hz, protect the motor from overvoltages, improve the quality of control in case of power loss;
• various technological equipment. Converters from Schneider Electric Altivar 71 are able to regulate the speed, carry out separate power supply of the control circuit, help in the creation of a braking module with an energy recovery system, the ability to connect to most of the available communication networks;
• elevators. The use of converters in the elevator equipment system makes it possible to create a reliable brake system control system, improve the processing of sensor readings, bring the existing relays into line with the requirements of the elevator safety system, and create the ability to control the output contactor health monitoring.

Schneider Electric, the creator of the altivar series converters, offers everyone to download a special application that allows you to configure the Altivar 71 frequency converter. A feature of this setup program is the ability to install it on any smartphone with an Android and Ios system.

Users will need to complete a simple registration process to gain full control of the inverter. After that, you can use your account to complete the setup procedure. The program has a convenient graphical terminal that facilitates the management of the inverter.

A high degree of protection makes the use of the program safe and as comfortable as possible.

Using your account allows you to access personal account, which makes it possible to obtain on-line operational information regarding the operation of the converter from Schneider Electric. The ability to obtain qualified technical support in 24-hour mode will allow anyone who decides to use Altivar 71 drives to normalize the output power.