Ultrasonic cleaning equipment uses Sonication to clean the workpiece, causing particles, oil, etc. attached to the workpiece to fall off or dissolve or emulsify with the mechanical vibration of ultrasonic waves, in principle, the core part of the ultrasonic cleaning equipment should be the role of ultrasound. The ultrasonic part of the ultrasonic cleaning machine is composed of two parts One is an Ultrasonic transducer or ultrasonic vibrator, and the other is an ultrasonic generator, an ultrasonic transducer to convert the electrical signals provided by the ultrasonic generator into mechanical vibrations. This article deals only with ultrasonic generators, not with Ultrasonic transducers.
The ultrasonic generator (hereinafter referred to as the generator) is essentially a power signal generator, producing a sine (or similar sine) signal of a certain frequency. The development of the ultrasonic generator is closely related to the development of power electronic devices, which generally can be divided into electronic tubes, and analog transistors. These stages of the switching transistor are described below.
The principle of the ultrasonic generator
First, the signal generator generates a signal of a specific frequency, which can be either a sine wave or a pulse. This specific frequency is the frequency of the transducer, the ultrasonic frequency of 25 kHz 28 kHz 35 kHz 40 kHz 1oo kHz or above has not been widely used in ultrasonic equipment. But with the development of precision cleaning from time to time. It is believed that the game will be gradually expanded. Power amplifiers come in many forms, such as tube class A amplifiers. Transistor Class A or Class B amplifier (both are analog) transistor switching amplifier, power generally from 50w to 5000w, the frequency signal generated by the signal generator is matched by the impedance of the power amplifier to match the output impedance of the transducer, which converts the electrical signal into mechanical vibration.
A perfect ultrasonic generator should also have a feedback link, mainly providing two aspects of the feedback signal: the first is to provide the output power signal, and know when the generator power supply (voltage) changes. The output power of the generator will also change, which is reflected in the transducer mechanical vibration is big and small, resulting in an unstable cleaning effect. Therefore, it is necessary to stabilize the output power and adjust the power amplifier through the power feedback signal to make the power amplifier stable. Ultrasonic cleaning equipment uses Sonication to clean the workpiece, causing particles, oil, etc. attached to the workpiece to fall off or dissolve or emulsify with the mechanical vibration of ultrasonic waves, in principle, the core part of the ultrasonic cleaning equipment should be the role of ultrasound.
The ultrasonic part of the ultrasonic cleaning equipment is composed of two parts One is an Ultrasonic transducer or ultrasonic vibrator, and the other is an ultrasonic generator, an ultrasonic transducer to convert the electrical signals provided by the ultrasonic generator into mechanical vibrations. This article deals only with ultrasonic generators, not with Ultrasonic transducers. The ultrasonic generator (hereinafter referred to as the generator) is a power signal generator, which generates a sine signal of a certain frequency. The development of the ultrasonic generator is closely related to the development of power electronic devices, which can be generally divided into electronic tubes and analog transistors. These stages of the switching transistor are described below.
