The development of electronic devices goes in several directions: reducing the size, improving the technology of their manufacture, the appearance of innovative design solutions, etc. All these areas are in good agreement with the intended use of equipment in various fields. Over time, circuit solutions and new technologies appear that improve the performance of electronic equipment. One of these devices can rightfully be called a PWM controller. This is a small-sized device, which is mainly used in power supplies of various capacities. It implements a method of voltage conversion and works great both in various household appliances and in production.
The modern PWM controller has high speed and is used, for example, in switching power supplies. The principle of its operation is quite simple, it converts a constant voltage into rectangular pulses of a certain duty cycle and frequency. These pulses and control a powerful output module based on transistors. This allows using a simple circuit to obtain an adjustable voltage source. This is important for electronic equipment, where the dimensions are fundamental. The PWM controller made it possible to create compact electronic devices: laptops, computers, televisions, etc.
With its help, you can implement various circuit solutions for controlling the speed of the electric drive. Feedback in this case can be carried out by various parameters - current or voltage, which reflect the state of the control object. It can be linear or
angular velocity, motor EMF, a signal from a temperature sensor, etc. Depending on the situation and the driving signal, the PWM controller will increase or decrease the speed of the electric motor. A good example of the use of this device in production is the
frequency converter.In household equipment, the TL494 PWM controller, which has proven itself in work, is most often used. The chip has a built-in frequency generator. This gives her a certain independence from external signals. A single or two-stroke operation mode allows you to simultaneously receive direct and inverse signals at the output, which can be used for further conversion. In general, its operation is optimized for use in switching power supplies. The number of inputs / outputs meets the requirements of already developed circuits with its use.
In addition to standard circuits, PWM controllers are intensively used in the design of innovative devices. Some of them, most likely, will soon begin to be applied on an industrial scale. With their help, it is easy to assemble a regulatory scheme that can work in various fields.
With the development of the manufacturing technology of these devices, it can be said that over time, compact high-speed devices will appear that implement the above-described principle of operation. This will allow the development of regulators with good performance. Such devices will be able to compete with their analog or digital rivals and be used in electric drive control circuits.