Field programmable gate array (FPGA)-based multi-channel phase-shift controller

A phase-shift control and controller technology, applied in the power supply field, can solve the problems of signal interference and low adjustment accuracy, and achieve the effects of high phase adjustment accuracy, simplified drive circuit and large adjustment range.

Inactive Publication Date: 2015-12-09
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
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Problems solved by technology

[0010] In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide a multi-channel ph

Method used

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  • Field programmable gate array (FPGA)-based multi-channel phase-shift controller
  • Field programmable gate array (FPGA)-based multi-channel phase-shift controller
  • Field programmable gate array (FPGA)-based multi-channel phase-shift controller

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings.

[0028] Such as Figure 1-3 As shown, a kind of FPGA-based multi-channel phase-shift controller of the present invention includes register storage modules, judgment identification modules, and phase-shift control modules connected in sequence, wherein,

[0029] The register storage module is used to store the data transmitted by the PC. The PC and the FPGA communicate through the UART serial port. The transmitted data is stored in the RAM of the FPGA chip. It has 4 control words, which need to be transmitted at least 4 times, and each When transferring data for the first time, the previously stored data cannot be overwritten by the data transferred later;

[0030] The judgment and recognition module is used to receive data from the register storage module, judge the type of the control word by identifying the high 8 digits of the data, and then transmit it to different...

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Abstract

The invention discloses a field programmable gate array (FPGA)-based multi-channel phase-shift controller, which comprises a register storage module, a judgment and recognition module and a phase-shift control module, which are serially connected with one another, wherein the register storage module is used for storing data transmitted by a personal computer (PC); the PC communicates with an FPGA chip; the transmitted data are stored in a random-access memory (RAM) of an FPGA chip; the judgment and recognition module is used for receiving the data from the register storage module, judging the type of control words through recognizing high eight bits of the data, and then conveying the control words to different registers; and the phase-shift control module generates the required pulse-width modulation (PWM) waveform according to different types of control words in various registers, so as to meet the drive and control requirements of an ultrasonic motor. The multi-channel phase-shift controller disclosed by the invention is high in frequency modulation accuracy, high in phase modulation accuracy and large in adjustment range, and simultaneously has soft starting and over-voltage protection functions; and a guarantee can be provided for drive and control of the ultrasonic motor.

Description

technical field [0001] The invention belongs to the technical field of power supplies, in particular to a phase-shift controller, which is mainly used for the control of ultrasonic motors. Background technique [0002] Ultrasonic motor is a new principle motor that uses ultrasonic vibration energy as a driving power source. As a brand new driver, ultrasonic motor has many superior properties, such as low speed, high torque, high power density, fast response, and is not affected by electromagnetic fields. Power-down self-protection, can directly drive the load, etc. [0003] Driving an ultrasonic motor requires a special ultrasonic power supply, the driving frequency is required to be within the ultrasonic range, and the frequency, phase and amplitude of the driving voltage are adjustable. [0004] According to the transmission principle of the traveling wave ultrasonic motor, the available control variables are: [0005] 1. Control voltage amplitude. Changing the voltage ...

Claims

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Application Information

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IPC IPC(8): H02N2/06H02N2/14
Inventor 李有光岳惠峰
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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