1、_ SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising there
2、from, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. Copyright 2011 SAE International All rights reserved. No part of this publication m
3、ay be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-4970 (outside U
4、SA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/AS20708/68AAEROSPACESTANDARDAS20708/68 REV. A Issued 1997-07 Revised 2011-07Superseding AS207
5、08/68 Synchro, Torque Differential Transmitter, Type 31TDX6C FSC 5990 RATIONALE This Revision consists of a 5 (five) year review, which provides updates to current format and references. NOTICE This specification is approved for use by all Departments and Agencies of the Department of Defense. The r
6、equirements for acquiring the Synchros described herein shall consist of this specification and the latest issue of SAE AS20708. Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AS20708/68A Page 2
7、 of 2TABLE 1 REQUIREMENTS Requirement Value Unit Tolerance Frequency Primary Voltage Primary Current Primary Power Impedance: Zrs Impedance Angle: Zrs DC Resistance (Line to Line): Rotor Stator Transformation Ratio Phase Shift Electrical Error Friction Torque Torque Gradient Temperature Rise Weight
8、Radial Play End Play 60 90 725 7.744 27 24 19 1.154 6.5(lead) 10 0.50.318 126 0.0008 0.0030 Hz volts milliampswattsohmsdegrees ohmsohms- degrees minutesounce-inches ounce-inches per degree degrees (C) ounces inchesinchesnominal nominal maximum maximum maximum minimum reference reference 2% maximum m
9、aximum maximum minimum maximum nominal maximum 0.0020 This unit shall not be subjected to the altitude requirements of SAE AS20708. TABLE 2 MILITARY PART NUMBER VARIANT CHARACTERISTICS MilitaryPart No. 1/A.010 B.010 GMaximum ShaftStyle Terminal EndU+.0000 M20708/68-01C .700 .730 3.635 Splined Termin
10、al Board .2405 1/ Military part number M20708/68-01C shall be the NATO standard. NOTE: The suffix letter following the numerical dash number corresponds to the latest modification letter in the type designation. TABLE 3 MILITARY PART NUMBER CROSS-REFERENCES SUPERSEDED MILITARY PART NUMBERMIL-S-20708
11、/68B NEW MILITARY PART NUMBER SAE AS20708/68A M20708/68B-001 M20708/68-01C NOTE: All line items shown in Table 3 refer to equivalent and interchangeable synchros of the same type designation modification. Part number changes do not affect form, fit, or function of the synchros listed therein. MIL-S-20708/68C, dated 02 March 1988, is canceled and replaced by SAE AS20708/68. PREPARED BY SAE COMMITTEE AE-7A - GENERATORS/CONTROLS/MAGNETIC DEVICES Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
