Actuator driving apparatus

A technology of driving device and actuator, applied in the direction of transducer head device, driving/moving recording head, instrument, etc., can solve the problem of high power consumption of D/A converter, etc.

Inactive Publication Date: 2013-09-11
PANASONIC CORP
View PDF1 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, the power consumption of the D / A converter becomes considerably large for actuators requiring precision of 10 bits or more

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Actuator driving apparatus
  • Actuator driving apparatus
  • Actuator driving apparatus

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0045] figure 1 The configuration of the actuator driving device according to the first embodiment is shown. The load 100 to be driven by the actuator driving device according to the present embodiment is, for example, a voice coil motor or the like which is a part of the actuator not shown. When the F terminal voltage FOUT is applied to the load 100, a forward current flows through the load 100, and the actuator moves in the forward direction. On the other hand, when the R terminal voltage ROUT is applied to the load 100, a reverse current flows through the load 100, and the actuator moves in the reverse direction. And, the torque generated in the actuator varies according to the amount of current supplied to the load 100 . That is, if more current is supplied to the load 100, a greater torque is generated in the actuator.

[0046] The actuator drive device according to this embodiment performs output switching and PWM control of FOUT and ROUT based on a torque command dig...

no. 2 Embodiment approach

[0118] Figure 17 The configuration of the actuator drive device according to the second embodiment is shown. The actuator drive device according to the present embodiment has an error integrating unit 16 added to the actuator drive device according to the first embodiment.

[0119] The error integration unit 16 corrects FLTOUT by adding a value obtained by integrating errors of TQ and SFB to FLTOUT output from the digital filter 10 .

[0120] The digital PWM generator 11 outputs SFU, SFL, SRU, and SRL based on the corrected FLTOUT. Specifically, the digital PWM generator 11 determines which of SFU, SFL, SRU, and SRL should be controlled according to the positive and negative polarities of the corrected FLTOUT for each PWM period, and further, according to the corrected The absolute value of FLTOUT determines the timing of edge generation of the signal to be controlled.

[0121] Configurations and operations other than those described above are the same as those described i...

no. 3 Embodiment approach

[0124] Figure 18 The configuration of the actuator driving device according to the third embodiment is shown. The actuator driving device according to the present embodiment has a guard detection unit 17 added to the actuator driving device according to the first embodiment.

[0125] If the load 100 is continuously driven in a state where a power supply fault or an earth fault has occurred at the output of the actuator driving device, the transistors constituting the H-bridge portion 12 may be destroyed by an abnormal voltage. . Therefore, in order to protect the H bridge portion 12 from being damaged, the protection detection portion 17 checks whether FOUT and ROUT are correctly output according to the control of the digital PWM generation portion 11, and if an incorrect output is detected, the actuator driving device will be activated. Output stops.

[0126] Specifically, the feedback filter 14 is Figure 16 In the case of the configuration shown in (a), if the protecti...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

An actuator driving apparatus is provided with: a digital filter (10) for conducting phase compensation of a torque command digital signal, using a fed back digital signal; a digital PWM generating unit (11) for generating a plurality of pulse-width modulated PWM control signals in accordance with the output of the digital filter; an H-bridge unit (12) for switching between first and second terminal voltages and outputting the switched voltage, in accordance with the plurality of PWM control signals; first and second continuous-time Delta Sigma A-D converters (13) for conducting A-D conversion of the first and second terminal voltages, respectively; and a feed back filter (14) for implementing decimation processing to the output of the first and second continuous-time Delta Sigma A-D converters (13), and feeding back a digital signal to the digital filter.

Description

technical field [0001] The present invention relates to an actuator (actuator) driving device, in particular to a fully digitally controlled actuator driving device. Background technique [0002] Actuator drive devices are widely used in various products, for example, in optical disc devices, they are used to control the tilt direction, tracking direction, and focus direction of the optical pickup, and slide motors that move the optical pickup in the radial direction of the optical disc. (sled motor) control, control of the loading motor (loading motor) used to pick and place the optical disc, control of the spindle motor (spindle motor) for rotating the optical disc, etc. [0003] In general, an actuator driving device uses a sense resistor to detect a current flowing through a load, and feedbacks the detection signal to perform phase compensation of a torque command signal to perform PWM driving on the load. Conventionally, almost all phase compensation filters and PWM si...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): H02P29/00G11B21/08G11B21/10H02P29/40
CPCG11B5/5526G11B5/59622G11B21/083G11B21/106H02P7/29H02P7/04H02P25/034H02P7/025
Inventor 河边章冈本好史濑上史明小林仁谷本清隆西野英树崎山史朗森江隆史横山明夫
Owner PANASONIC CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap