1、 INCH-POUND MIL-PRF-62368C(AT) 28 May 2009 SUPERSEDING MIL-PRF-62368B(AT) 8 July 1997 PERFORMANCE SPECIFICATION MOTOR, GEARHEAD, 18 - 30 VOLTS, DIRECT CURRENT This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification c
2、overs a direct current gearhead motor used to operate the Remote Arming Device (RAD) on a military ground vehicle. 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3, 4, or 5 of this specification. This section does not include documents cited in ot
3、her sections of this specification or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements of documents cited in sections 3, 4, or 5 of this specifi
4、cation, whether or not they are listed. Comments, suggestions, or questions on this document should be addressed to U.S. Army Tank-automotive and Armaments Command, ATTN: AMSRD-TAR-E/CM/DM/STND MS#268, 6501 E. 11 Mile Road, Warren, MI 48397-5000 or emailed to DAMI_STANDARDIZATIONconus.army.mil. Sinc
5、e contact information can change, you may want to verify the currency of this address information using the ASSIST Online database at http:/assist.daps.dla.mil. AMSC N/A FSC 6105 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. 2.2 Government documents. 2.2.1 Specifi
6、cations, standards, and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract (see 6.2). Provided by IHSNot for ResaleNo
7、reproduction or networking permitted without license from IHS-,-,-MIL-PRF-62368C(AT) INTERNATIONAL STANDARDIZATION AGREEMENTS STANAG 1135 - Interchangeability of Fuels, Lubricants and Associated Products used by the Armed Forces of the North Atlantic Treaty Nations DEPARTMENT OF DEFENSE STANDARDS MI
8、L-STD-461 - Requirements for the Control of Electromagnetic Interference Characteristics of Subsystems and Equipment MIL-STD-810 - Environmental Engineering Considerations and Laboratory Tests DEPARTMENT OF DEFENSE HANDBOOKS MIL-HDBK-454 - General Guidelines for Electronic Equipment (Copies of these
9、 documents are available online at http:/assist.daps.dla.mil/quicksearch/ or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.2.2 Other Government documents, drawings, and publications. The following other Government documents, drawings,
10、and publications form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. US ARMY TACOM DRAWINGS 12265908 - Motor, Gearhead (Interface) (Copies of this drawing are available from the U.S. A
11、rmy Tank-automotive and Armaments Command, ATTN: AMSRD-TAR-E/CM/DM/STND MS #268, 6501 E. 11 Mile Road, Warren, MI 48397-5000, or email DAMI_STANDARDIZATIONconus.army.mil.) 2.3 Non-Government publications. The following documents form a part of this document to the extent specified herein. Unless oth
12、erwise specified, the issues of these documents are those cited in the solicitation or contract (see 6.2). AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI) ANSI/ASQC Z1.4 - Sampling Procedures and Tables for Inspection by Attributes (DoD Adopted) ANSI/SAE AS1933 - Age Controls for Hose Containing Age-Se
13、nsitive Elastomeric Material (DoD Adopted) 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-62368C(AT) ANSI/SAE AS478 - Identification Marking Methods (DoD Adopted) (Copies of these documents are available online at www.ansi.org or from ANSI
14、 Customer Service Department, 25 W. 43rd Street, 4th Floor, New York, NY 10036.) ASTM INTERNATIONAL ASTM B633 - Standard Specification for Electrodeposited Coatings of Zinc on Iron or Steel (DoD Adopted) (Copies of these documents are available from www.astm.org or ASTM International, 100 Barr Harbo
15、r Drive, West Conshohocken, PA 19428-2959.) 2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersed
16、es applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 First article. When specified (see 6.2), a sample shall be subjected to first article inspection in accordance with 4.3. 3.2 Materials. Materials used shall be in accordance with the manufacturers m
17、aterials specifications for gearhead motors. The materials shall be capable of meeting all the operational and environmental requirements specified herein (see 4.5.1). 3.2.1 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally preferable materials sho
18、uld be used to the maximum extent possible provided that the material meets or exceeds the operational and maintenance requirements, and promotes economically advantageous life cycle costs (see 4.5.1). 3.2.2 Age sensitive materials. The use of age-sensitive elastomers, as defined by ANSI/SAE AS1933,
19、 shall be identified and controlled in accordance with that standard (see 4.5.1). 3.2.3 Gearing. All gearing shall be of the necessary materials, finishes, and precision to provide reliable performance as outlined herein (see 4.5.1). 3.2.4 Lubrication. The unit shall be lubricated with grease confor
20、ming to STANAG 1135, method G-354 or equivalent and shall not require lubrication during the service of the assembly (see 4.5.1 and 6.4). 3 3.2.5 Cover and mounting flange. Material shall be suitable for the intended purpose. Non-corrosion metal resistant materials shall be zinc plated in accordance
21、 with ASTM B633, service condition (SC 8) (minimum), type II or equivalent (see 4.5.1). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-62368C(AT) 3.2.6 Dissimilar metals. Unless suitably protected against electrolytic corrosion, dissimilar m
22、etals shall not be placed in direct contact. When protection is used, it shall be such type that a low impedance path is offered to radio frequency currents (see 4.5.1). 3.3 Construction. The motor and the output shaft shall conform to the envelope dimensions and interfaces of Drawing 12265908 (see
23、4.5.1 and 4.5.2). 3.3.1 Backlash. Backlash shall be not more than 3 degrees () (see 4.5.1). 3.3.2 Bearings. Bearings shall be suitable for their intended purpose. Bearings which are exposed to the environment shall be of the sealed type (see 4.5.1). 3.3.3 Moisture pockets. Pockets, wells, and traps
24、in which water or condensed water vapor can collect shall be avoided. Lead wire entry shall be sealed to prevent entrance of contamination into the motor (see 4.5.1). 3.3.4 Standard parts. Standard utility parts, such as screws, bolts, nuts, cotter pins, etc., shall be selected in accordance with th
25、e applicable guidelines of MIL-HDBK-454 (see 4.5.1). 3.4 Performance. Unless otherwise specified herein, the motor shall meet all performance requirements of this specification with an applied voltage of 24 0.5 volts (V) direct current (dc), and with the motor flange mounted on a 0.13 by 1.88 by 3 i
26、nch (in.) (3.3 by 7.8 by 76.2 millimeters (mm) thick aluminum alloy plate. 3.4.1 Rotation of output shaft. The shaft rotation, as viewed from the shaft end, shall be in a counterclockwise (CCW) direction with positive voltage applied to plus (+) terminals of the filter. Reversing lead polarity shall
27、 reverse shaft rotation (see 4.5.3). 3.4.2 No load speed. The no load speed of the motor shall be no more than 36 revolutions per minute (rpm) (see 4.5.4). 3.4.3 Zero torque current. The zero torque current of the motor shall be no more than 0.5 amperes (A) dc (see 4.5.5). 3.4.4 Speed and current at
28、 640 ounce-inch (oz-in.) (4.52 Newton-meter (N-m). With the torque at 640 oz-in., the speed shall be no less than 22 rpm in either direction, and the current shall be no more than 1.5 A dc (see 4.5.6). 3.4.5 Speed and current at 950 oz-in. (6.71 N-m). With the torque at 950 oz-in., the speed shall b
29、e no less than 15 rpm in either direction, and the current shall be no more than 2.5 A dc (see 4.5.7). 3.4.6 Stall torque and current. The stall torque shall be no less than 1590 oz-in. (11.3 N-m) and the stall current at stall torque shall be no more than 7 A dc. The motor shall 4 Provided by IHSNo
30、t for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-62368C(AT) stall without incurring damage, and performance after stall shall remain within specification limits (see 4.5.8). 3.4.7 Plug reversal. The motor performance shall remain within specified limits after
31、application of rated voltage of polarity opposite the back electromotive force (emf) while rotating at any speed up to no-load speed. The speed in either direction shall not be less than that specified in 3.4.4 and 3.4.5. The following parameters shall apply to the plug reversal requirements (see 4.
32、5.9). a) Resistance of switching circuit: 1 ohm (maximum) - excluding gear motor b) Voltage switching time: 100 milliseconds (ms) (maximum). Typical direction of switching sequence is CCW-OFF-clockwise (CW). “OFF” switch position connects both motor leads to ground potential during a minimum interva
33、l of 10 milliseconds (ms). 3.4.8 Duty cycle. The duty cycle shall be as follows (see 4.5.10): a) On for 2 seconds at 640 oz-in. with rated voltage b) Reverse drive polarity (plug reversed in accordance with 3.4.7) at rated voltage for a 2 second period with 640 oz-in. load and rated voltage applied
34、c) Repeat steps (a) and (b) for 30 cycles 3.4.9 Inertia (motor). Inertia of the rotating parts shall be no more than 1.26 pound-inch squared (lb-in2) (7.65 kilogram-meter square (kg-m2) at the output shaft (see 4.5.11). 3.4.10 Operating voltage. The motor shall operate over the input voltage range o
35、f 18 to 30 V dc with the output as specified in 3.4.2 through 3.4.7, and 3.4.8 inclusive, in direct proportion to the voltage specified (see 4.5.12). 3.4.11 Insulation resistance. The motor shall have an insulation resistance of not less than 12 megaohms initially, prior to installation of the elect
36、romagnetic interference (EMI) filter (see 4.5.13). 3.4.12 Dielectric withstanding voltage. The motor shall be capable of initially withstanding 500 V root mean square (rms), 60 Hertz (Hz) for 1 minute (or 600 V rms, 60 Hz for 1 second) between armature winding and frame, prior to installation of the
37、 EMI filter by the manufacturer. There shall be no breakdown or degradation of insulation (see 4.5.14). 3.4.13 Electromagnetic interference. The motor shall comply with the conducted and radiated emissions requirements for Army Ground Electrical/Electronic Equipment (see 4.5.15). 3.4.13.1 Conducted
38、emissions. Conducted emissions shall not exceed the values given in CE102 of MIL-STD-461 (see 4.5.15.1). 5 3.4.13.2 Radiated emissions. Electric field emissions shall not be radiated in excess of the limits for Army ground applications in RE102 of MIL-STD-461 (see 4.5.15.2). Provided by IHSNot for R
39、esaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-62368C(AT) 3.4.14 Voltage transient. The motor shall withstand voltage transients as specified in operating and non-operating modes (see 4.5.16). 3.4.14.1 Operating mode. 3.4.14.1.1 Combined generator-battery power sup
40、ply. 3.4.14.1.1.1 Steady-state voltage. Circuit steady-state voltage shall be between 25 and 30 V. 3.4.14.1.1.2 Ripple. The upper and lower peaks of ripple voltage (see figure 1), shall be less than 2 V. The frequency components of the ripple shall be within the range of 50 Hz to 200 kHz. 3.4.14.1.1
41、.3 Surges. All surges resulting from system operation shall fall within the loci shown in figure 2. 3.4.14.1.1.4 Spikes. All spikes resulting from system operation shall fall within the loci shown in figure 3. 3.4.14.1.1.5 Starting disturbances. Fully charged battery shall be used (battery drawing l
42、ess than 5 A from a 28 V charging source with electrolyte temperature between 81 degrees Fahrenheit (F) and 100 F (27 degrees Celsius (C) and 38 C). 3.4.14.1.1.5.1 Initial engagement surges. During this disturbance, the voltage shall not be below 6 V and the duration shall not exceed 1 second. 3.4.1
43、4.1.1.5.2 Cranking level. The steady voltage during cranking shall not be below 16 V (no more than 3 cranking attempts of 30 seconds each with 2-minute cranking level pauses between attempts). This characteristic applies to starting the second engine of a multi-engine vehicle, or slave starting anot
44、her vehicle. 3.4.14.1.2 Generator only (no battery, single fault condition). 3.4.14.1.2.1 Steady-state voltage. The voltage shall be less than 33 V. 3.4.14.1.2.2 Ripple. The upper and lower peaks of ripple voltage (see figure 1) shall each be less than 7 V. The frequency components of the ripple sha
45、ll be within the range 50 Hz to 200 kHz. 3.4.14.1.2.3 Surges. All surges resulting from system operation shall fall within the loci shown in figure 4. (A lower steady-state limit of 23 V shall be used to establish the recovery time of negative-going surges.) 6 Provided by IHSNot for ResaleNo reprodu
46、ction or networking permitted without license from IHS-,-,-MIL-PRF-62368C(AT) 3.4.14.1.2.4 Spikes. All spikes resulting from system operation shall fall within the loci shown in figure 5. 3.4.14.2 Non-operating. 3.4.14.2.1 Battery only condition. 3.4.14.2.1.1 Steady-state voltage. Circuit steady-sta
47、te voltage shall be between 20 and 27 V. 3.4.14.2.1.2 Ripple. The upper and lower peaks of ripple (see figure 1) shall each be less than 2 V. The frequency components of the ripple shall be within the range 50 Hz to 200 kHz. 3.4.14.2.1.3 Spikes. All spikes resulting from system operation shall fall
48、within the loci shown in figure 3. 3.4.14.2.1.4 Starting disturbances. Fully charged battery shall be used (battery drawing less than 5 A from a 28 V charging source with electrolyte temperature between 81 F and 100 F (27 C and 38 C). 3.4.14.2.1.4.1 Initial engagement surges. During this disturbance
49、, the voltage shall not fall below 6 V and the duration shall not exceed 1 second. 3.4.14.2.1.4.2 Cranking level. The steady voltage during cranking shall not be below 16 V (no more than 3 cranking attempts of 30 seconds each with 2-minute cranking level pauses between attempts). 3.4.15 Environmental. 3.4.15.1 Temperature. 3.4.15.1.1 High (operating). The motor shall meet the performance requirements c
