Surely you have already heard that in the next two years, electricity consumption will increase? It is expected that consumption will double. Every engineer and company manager already knows that frequency converters reduce the power consumption of equipment that uses electric motors. In advising our customers, we understand that many people still have questions about the operation of frequency converters and their broad aspect. Therefore, we draw your attention to the fact that in this article we will recall what a frequency converter is, how it works and what are the possibilities for using frequency converters in industrial automation.
A frequency converter (FC) is an electric device that converts a current with one frequency to a current with another frequency. The principle of operation of frequency converters can be divided into three stages:
In the first and second stages, the alternating current is converted into direct current through a rectifier with a capacitor. Then converted back to variable frequency AC by an inverter. Inverter is the main component, so the frequency converter is sometimes know simply as inverter. Next, we want to talk about the main component in the frequency converter - this part name is inverter.
The direction of the current supplied to the motor can be adjusted using IGBT switches. Depending on which IGBT switches are turned on, positive or negative current can flow through in electric motor. Invertek Drives has six isolated bipolar transistors (IGBTs) in drives. The principle of their operation is high-speed switches, in the circuit of which the diodes are arranged in parallel. By turning the IGBT switches on and off, a three-phase current can be generated in the motor windings. By changing the turn-on time, we can control this current. Timely control is called pulse-width modulation (PWM).
Today, Invertek frequency converters are used in almost every industry where motor control is required. For example, in production halls, lifting equipment, pumping stations and ventilation equipment. Some examples are below:
1. In industry
2. Pump control
3. Fan control
Invertek Drives offers a wide range of frequency converters for pumps, fans, cranes/elevators and heavy duty applications. The choice of frequency converters is individual and depends on the application, technical parameters and corresponding protection needs. In one case, a device with an IP20 degree of protection is suitable, in the other case, IP55 or IP66 is suitable, if need protect against moisture and dust. How to choose the most suitable frequency converter, read in one of the previously created articles.
It all depends on the application, but experience shows that by installing frequency converters for their customers, companies on average save between 30% and 50% of their electricity consumption per year. If you need frequency converters or accessories, please contact ZTF Lāsma specialists who will help you find the most suitable and cost-effective solution. We are here to support!
Below we offer a look at the series of frequency converters of our long-term cooperation partner Invertek Drives:
ZTF LASMA has a wide range of power frequency converters in its warehouse, which can be obtained immediately within a few hours or by pre-ordering with delivery up to 5 working days.
Other articles and videos about frequency converters:
