Transformer-free ultrasonic motor driver

A technology of ultrasonic motor and driver, applied in the direction of generator/motor, piezoelectric effect/electrostrictive or magnetostrictive motor, electrical components, etc., can solve the problems of high cost, large volume, poor adaptability, etc., and achieve cost Low profile, small size, and strong load capacity
CN101060291AInactive Publication Date: 2007-10-24HARBIN INST OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HARBIN INST OF TECH
Publication Date
2007-10-24
Estimated Expiration
Not applicable · inactive patent

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Abstract

The disclosed ultrasonic wave motor driver without transformer comprises: a SCM pulse signal generation circuit with signal output end connected with the input end of a multi-path isolation drive circuit, multi-path bridge chop circuit with control signal input end connected with the output end of the isolation drive circuit, and a dc boost-up circuit with dc drive voltage output end paralleling the two power ends of chop circuit with the power ground. This invention overcomes defects in current product, and has wide application.
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Description

technical field

[0001] The invention relates to a driver for an ultrasonic motor. Background technique

[0002] Ultrasonic motor is a brand-new driving device that has appeared in the past two decades. Compared with traditional electromagnetic motors, it has small inertia, is not affected by magnetic fields, runs quietly, has high torque at low speed, can directly drive loads, and is self-locking when power is off. , Flexible and diverse forms of movement. Ultrasonic motors need at least two high-frequency and high-voltage signals with a phase difference of 90° to drive. At present, ultrasonic motor drivers are roughly divided into two categories: one is to use switch inverter technology (see Figure 12) and adopt transformer to boost the voltage. This method is widely used in China, but it is bulky, and different types of motors need to be matched. Power supplies of different types (as the open document of Chinese patent application number 02138534.3) have bad versatility;...

Claims

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