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Zero voltage-zero current soft switching type driving method of ultrasonic driving unit

A technology of driving unit and driving method, which is applied in the direction of high-efficiency power electronic conversion, electrical components, generator/motor, etc., and can solve the problems of large volume, high loss of ultrasonic motor drive circuit, and low efficiency

Inactive Publication Date: 2020-07-28
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention aims to solve the problems of high loss, large volume and low efficiency of the ultrasonic motor drive circuit designed by the traditional inverter topology

Method used

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  • Zero voltage-zero current soft switching type driving method of ultrasonic driving unit
  • Zero voltage-zero current soft switching type driving method of ultrasonic driving unit
  • Zero voltage-zero current soft switching type driving method of ultrasonic driving unit

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0050] Specific embodiment one: a zero-voltage-zero-current soft-switching drive method for an ultrasonic motor, characterized in that it consists of a two-phase pseudo-full-bridge inverter circuit (101) with soft-switching capability, a matching circuit (102), a specific It consists of matching inductance, snubber capacitor, dead time and delay time calculation method.

specific Embodiment approach 2

[0051] Specific embodiment 2: This embodiment is a further description of the ultrasonic motor zero-voltage-zero-current soft-switching driving method described in specific embodiment 1. Refer to figure 1 Describe this embodiment in detail, the two-phase pseudo-full-bridge inverter drive circuit with soft switching capability described in this embodiment, the two-phase pseudo-full-bridge inverter circuit (101) that is made up of six power switch tubes includes a MOS tube (Q 1 ), the second MOS (Q 2 ), MOS No. 3 (Q 3 ), MOS tube No. 4 (Q 4 ), No. 5 MOS tube (Q 5 ), No. 6 MOS tube (Q 6 ), No. 1 snubber capacitor (C Q2 ), No. 2 snubber capacitor (C Q4 ), Transformer No. 1 (T A ) and No. 2 transformer (T B ),

[0052] There is a freewheeling diode directly between the drain and the source of each MOS transistor,

[0053] No. 1 MOS tube (Q 1 ) drain, the third MOS tube (Q 3 ) drain and the fifth MOS tube (Q 5 ) is connected to the drain as the positive pole of the DC ...

specific Embodiment approach 3

[0099] Embodiment 3: This embodiment is to further explain the two-phase pseudo-full-bridge inverter driving circuit with soft switching capability described in Embodiment 2. In this embodiment, the bases of the six power switch tubes are applied The switch control logic:

[0100] No. 1 power switch tube (Q 1 ) switch state and No. 6 power switch tube (Q 6 ) switch state is the same, the second power switch tube (Q 2 ) and No. 5 power switch tube (Q 5 ) switch state is the same, the third power switch tube (Q 3 ) and No. 4 power switch tube (Q 4 ) switch state is roughly the opposite,

[0101] No. 1 power switch tube (Q 1 ), No. 2 power switch tube (Q 2 ), No. 3 power switch tube (Q 3 ), No. 4 power switch tube (Q 4 ), No. 5 power switch tube (Q 5 ) and No. 6 power switch tube (Q 6 ) has one and only one turn-on or one turn-off in each inverter cycle.

[0102] In this embodiment, from Figure 5 It can be seen that, in order to avoid the corresponding increase in s...

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Abstract

The invention discloses a zero-voltage-zero-current soft switching type driving method for an ultrasonic motor, relates to the technical field of driving of a two-phase actuator and solves problems that a traditional ultrasonic motor driving circuit is high in loss, large in heat productivity and the like. The method is characterized in that resonance between a series inductor and a buffer capacitor is realized by optimally designing and matching an inductance value of an inductor, a capacitance value of a buffer capacitor, a dead time value and a delay time value so that the zero-voltage andzero-current switching of the power tube can be realized. The method is advantaged in that two signal input ends of a two-phase pseudo-full-bridge inverter are connected with a power grid, two signaloutput ends of a two-phase pseudo-full-bridge inverter circuit are respectively connected with two signal input ends of a matching circuit, and output ends of a matching circuit are respectively usedfor being connected with a two-phase ultrasonic motor.

Description

technical field [0001] The present invention relates to the drive technology of two-phase actuators, and more specifically, relates to an inverter circuit with soft switching capability and a control method for controlling two-phase ultrasonic motors; the scheme of the present invention is especially suitable for two-phase ultrasonic motors Optimal design of the drive circuit. Background technique [0002] The driving technology of the existing ultrasonic motor usually depends on the inverter. With the appearance of the ultrasonic motor and the expansion of its application range, the problems existing in the existing driving technology are increasingly prominent in the application of the ultrasonic motor system. [0003] The two-phase ultrasonic motor is a new type of two-phase actuator. Compared with the traditional two-phase electromagnetic motor, the ultrasonic motor has many advantages in high displacement sensitivity, precise positioning accuracy and high static torque ...

Claims

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Application Information

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IPC IPC(8): H02M7/5387
CPCH02M7/5387H02M1/0058Y02B70/10H02N2/147H02N2/001H02N2/0075
Inventor 史维佳亓雪赵勃谭久彬
Owner HARBIN INST OF TECH