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 theref
2、rom, 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 ma
3、y 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 US
4、A) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.orgSAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/AS20708/50AAEROSPACESTANDARDAS20708/50 REV. A Issued 1999-07 Revised 2011-02Superseding AS20708
5、/50 Synchro, Torque Receiver Transmitter, Type 23TRX4A FSC 5990 RATIONALEThis Revision consists of a 5 (five) year review, which provides updates to current format and references NOTICEThis specification is approved for use by all Departments and Agencies of the Department of Defense. The requiremen
6、ts for acquiring the Synchros described herein shall consist of this specification and the latest issue of SAE AS20708. A change bar (|) located in the left margin is for the convenience of the user in locating areas where technical revisions, not editorial changes, have been made to the previous is
7、sue of this document. An (R) symbol to the left of the document title indicates a complete revision of the document, including technical revisions. Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only. Copyright SAE International Provided by
8、 IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AS20708/50A Page 2 of 2TABLE 1 REQUIREMENTS Requirement Value Unit Tolerance Frequency 400 Hz 1% Primary Voltage 115 volts 1% Primary Current 720.0 milliamps maximum Primary Power 4.6 wa
9、tts maximum Impedance:Zss 6.5-8.1 ohms min.-max.Impedance Angle: Zss 44.0-55.0 degrees min.-max.Transformation Ratio 0.783 - 2%Phase Shift (Lead) 2.0 degrees maximum Electrical Error 6.0 minutes maximum Receiver Error 45.0 Minutes maximum Null Voltage: Total Fundamental150.030.0millivoltsmillivoltsm
10、aximummaximumSynchronizing Time: 30 2 1.0 seconds maximumSynchronizing Time: 177 2 2.0 seconds maximumTorque Gradient 0.025 ounce-inches per degree minimumRadial Play 0.0010 inches maximum End Play 0.0025 inches 0.0020 Temperature Rise 30.0 degrees (C) maximum Variation of Voltage (+10%) and Freq. (
11、5%) 6.5 watts maximumTABLE 2 MILITARY PART NUMBER VARIANT CHARACTERISTICS Military Part No. 1/A.010B.010GMaximumShaftStyleTerminal End U+.0000- .0002 M20708/50-01A .676 .719 3.160 Splined Terminal Board .2405 1/ Military Part number M20708/50-01A shall be NATO standard. 1/ The suffix letter followi
12、ng the numerical dash number corresponds to the latest modification letter in the type designation. TABLE 3 MILITARY PART NUMBER CROSS-REFERENCES Superseded Military Part Numbers New Military Part Numbers SAE AS20708/50A MIL-S-20708/50D MIL-S-20708/50C MIL-S-20708/50B M20708/50-001 M20708/50C-001 M2
13、0708/50-001 M20708/50-01A 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. 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-,-,-
