Separately excited ultrasonic driving power supply

Abstract

The invention provides a separately excited ultrasonic driving power supply, which comprises an inductor L1, an inductor L2, an inductor L3, an inductor L4, an inductor L5, an inductor L6, a diode D1,a diode D2, a diode D3, a diode D4, a diode D5, a diode D6, a diode D7, a diode D8, a diode D9, a diode D9, a diode D10, a diode D11, an MOS tube Q1, an MOS tube Q2, an MOS tube Q3, an MOS tube Q4, ahigh-frequency transformer T, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, a resistor R1, a wiring terminal J1, a wiring terminal J2, a wiring terminal J3, a wiring terminal J4, a wiring terminal J5, a wiring terminal J6, a wiring terminal J7 and a wiring terminal J8. J1 is connected with one end of C1 and one endof L1. J2 is connected with the other end of C1 and the other end of L2. J3 is connected with one end of the secondary winding of T. J4 is connected in series with L6 and is connected with the other end of the secondary winding of T. J5 is connected with the grid electrode of Q1. J6 is connected with the grid electrode of Q2. J7 is connected with the grid electrode of Q3. J8 is connected with thegrid electrode of Q4. One end of the primary winding of T is connected with L4 in series, and then is connected with the source electrode of Q3 and the drain electrode of Q4. The other end of the primary winding of T is connected with R1 in series and then is connected with the source electrode of Q1 and the drain electrode of Q2. The drain electrode of Q1 is connected with the drain electrode ofQ3. The source electrode of Q2 is connected with the source electrode of Q4. The invention has the following advantages: a full-bridge high-frequency inverter circuit structure with a built-in auxiliary network is used for replacing a half-bridge structure in the prior art, so that the loss of a PWM duty cycle is greatly reduced. Therefore, the switch loss of MOS tubes under the high-frequency condition can be greatly reduced, so that the output efficiency of a high-power ultrasonic generator is greatly improved.

Description

technical field [0001] The invention relates to an ultrasonic generator power supply assembly, in particular to a separately excited ultrasonic driving power supply. Background technique [0002] Ultrasound, especially high-power ultrasound, is widely used in medical fields such as ultrasonic cleaning, imaging, and atomization. The ultrasonic driving power supply is the power supply component of the ultrasonic generator, and its amount can convert the power frequency commercial power into high frequency alternating current for the ultrasonic transducer to generate ultrasonic waves. Ultrasonic driving power can be divided into self-excited and other-excited according to different excitation methods. The separately-excited ultrasonic driving power has more advantages in output power, so it is commonly used in current high-power ultrasonic generators. Most of the externally excited ultrasonic driving power supplies in the current technology use half-bridge high-frequency inver...

AI Technical Summary

Problems solved by technology

Most of the externally excited ultrasonic driving power supplies in the current technology use half-bridge high-frequency inverters. However, the PWM duty ratio of the half-bridge high-frequency inverters is seriously lost, and the switching loss of the MOS tubes is too large, resulting in its power output. Low efficiency, this problem is particularly prominent in high-power ultrasonic generators

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