1、BRITISH STANDARD BS 2G 147-1: 1966 Incorporating Amendment No. 1 Specification for A.C. motors for aircraft Part 1: Three-phase constant frequency squirrel-cage induction motors UDC 629.13.066:621.313.333.2.025.3BS2G147-1:1966 This British Standard, having been approved by the Aircraft Industry Stan
2、dards Committee and endorsed by the Chairman ofthe Engineering Divisional Council, was published under theauthority of the General Council of the Institution on 17February1966 BSI 10-2000 The following BSI references relate to the work on this standard: Committee reference ACE/42 Draft for comment D
3、65/1699 ISBN 0 580 34117 8 Amendments issued since publication Amd. No. Date of issue Comments 420 February 1970 Indicated by a sideline in the marginBS2G147-1:1966 BSI 01-2000 i Contents Page Foreword ii 1 Scope 1 2 Definitions 1 Section 1. General requirements 3 Design and construction 1 Section 2
4、. Particular requirements 4 Supply voltage and frequency 1 5 Overhaul periods 1 6 Rotation 1 7 Rating 1 8 Cooling 1 9 Performance 2 10 Mounting and drive 2 11 Vibration, acceleration, climatic proofing and compass safe distance 2 12 Explosion-proofness 2 13 Fire resistance 2 14 Waterproofing 2 15 De
5、claration of performance 2 16 Nameplate 2 Section 3. Tests 17 General 3 18 Resistance test 3 19 Load tests 3 20 Starting test 3 21 Run-up torque test 3 22 Temperature test 3 23 Cold test 4 24 Hot test 4 25 Overspeed test 4 26 Insulation resistance tests 4 27 Endurance tests 4 28 Acceleration, vibrat
6、ion and climatic tests 4 29 Waterproofing tests 5 30 Explosion-proofness test 5 31 Fire resistance test 5 32 Component check 5 33 Overspeed test 5 34 Load test 5 35 Starting torque test 5 36 Insulation tests 5 37 Selection of samples 5 38 Load tests 6 39 Starting test 6 40 Run-up torque test 6 41 En
7、durance tests 6 42 Dimensional check for wear 6BS2G147-1:1966 ii BSI 01-2000 Foreword This standard has been prepared as part of a programme of work to bring the aircraft series British Standard for rotating machines up to date in relation to present-day and probable future requirements, and to expe
8、rience gained in working to earlier issues of the standards. It is intended that the standard, when completed, shall cover the whole range of a.c.motors for aircraft applications in a series of separate Parts. Part 1 is a revision of BS G 147:1955. Reference is made in the standard to the following
9、British Standards: BS 2G 100, General requirements for electrical equipment and indicating instruments for aircraft. BS G 102, General requirements for rotating electrical machines for aircraft 1) . NOTEWhere metric equivalents are given, the figures in British units are to be regarded as the standa
10、rd. The metric conversions are approximate. More accurate conversions should be based on the tables in BS350, “Conversion factors and tables”. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct appli
11、cation. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages1 to 6 and a back cover. This standard has been updated (see copyright date) and may have had amen
12、dments incorporated. This will be indicated in the amendment table on the inside front cover. 1) In course of preparation.BS2G147-1:1966 BSI 01-2000 1 1 Scope This part of BS G147 covers the general design andtest procedure for three-phase constant frequency (400c/s) a.c.squirrel-cage induction moto
13、rs for use in aircraft, other than motors classed as engine starter motors. 2 Definitions For the purposes of this part of BS G147 the following definitions apply: 2.1 motor the term “motor” includes gears supplied with the motor 2.2 type motor a motor representative of others identical in design, c
14、onstruction and rating 2.3 rating the operating limitations assigned to the motor by the manufacturer 2.4 rated speed and torque the speed and torque declared by the manufacturer for nominal voltage and frequency 2.5 time rating the time for which the motor can be operated at rated torque without ex
15、ceeding the safe temperature Section 1. General requirements 3 Design and construction The design and construction of the motor shall comply with the relevant requirements of BS2G100 and BS G102. Section 2. Particular requirements 4 Supply voltage and frequency The motor shall be suitable for use on
16、 constant frequency a.c.supplies having the characteristics specified in BS 2G100-3. 5 Overhaul periods Unless otherwise required by the individual specification, the motors shall be suitable for the following periods of unattended bench operation before requiring maintenance. The design aim should
17、be to achieve3000 (aircraft) hours operation of the motor before requiring overhaul. 6 Rotation Motors shall be marked with an arrow to show the direction of rotation with a supply of phase sequence A, B, C, connected to terminals A, B, C respectively. For reversible motors the relationship between
18、the direction of rotation and the supply connections shall be stated. 7 Rating The manufacturer shall declare the rated torque(s) and speed(s) at the nominal terminal voltage and frequency, and the time rating(s) for the declared ambient temperature(s). The manufacturer shall declare any limitation
19、of the frequency of operation and the ON and OFF time periods for continually repeated operation. Any variation in rating due to the method of mounting shall be agreed between the manufacturer and the purchaser. NOTEShort-time rated motors are generally required to be capable of performing at least
20、three consecutive operations without rests for cooling. Therefore the time of one operation should not exceed one third of the time rating of the motor, i.e.the time for which the motor can be operated at rated torque without exceeding the safe temperature. For actuators this means six operations of
21、 the motor. 8 Cooling a) The manufacturer and purchaser shall agree upon the cooling arrangements to be provided for the motor. b) Cooling connections shall comply with the requirements of BSG102. a) continuous duty 1500hours operation b) frequent duty (e.g.with an inching actuator) 75 hours total r
22、unning time in accordance with the relevant duty cycle c) infrequent duty d) limited life (standby emergency duty) not less than 5 per cent of the performance of a), b) or c), as appropriate. BS2G147-1:1966 2 BSI 01-2000 9 Performance a) There should preferably be no limitation in the performance of
23、 the motor in respect of the attitude in which it may be mounted. Any such limitations shall be declared. b) Unless otherwise specified in the individual specification, at minimum voltage and maximum frequency the following relationships shall obtain: On starting at maximum voltage and minimum frequ
24、ency, the current shall not exceed six times the normal full load current. 10 Mounting and drive The mounting and drive of the motor shall comply with the requirements of BSG102. 11 Vibration, acceleration, climatic proofing and compass safe distance The motor shall meet the requirements of BS2G100-
25、2 in respect of: 12 Explosion-proofness If required by the individual specification the motor shall meet the requirements of BS2G100-2 for explosion-proof equipment. Motors ventilated other than by clean air shall comply with these requirements whilst running. 13 Fire resistance A motor which to be
26、installed within a potential fire zone, and which must function during or after a fire, shall meet the appropriate test of fire resistance specified in BS2G100-2 as declared by the manufacturer. 14 Waterproofing If required by the individual specification, the motor shall meet the requirements of th
27、e Grade A or Grade B water-proofness tests described in BS2G100-2, as declared by the manufacturer. 15 Declaration of performance In addition to the declarations required by BS2G100, the following information shall be provided by the manufacturer in regard to the motor: a) Rated torque(s), speed(s),
28、 direction of rotation, current and power factor. b) Time rating(s). c) Cooling requirements. d) Starting, run-up and pull-out torque at minimum voltage and maximum frequency. e) Starting current and power factor for maximum voltage and minimum frequency. 16 Nameplate a) A nameplate and, where possi
29、ble, a modification plate shall be mounted on the body of the motor. b) The following information shall be marked on the nameplate: Manufacturers name or identification Serial number Type (or part) number. Stores reference number, when applicable. c) If possible, the following information should als
30、o be marked on the nameplate: Voltage and frequency Number of phases Speed Output in watts Time rating d) The modification plate shall provide for ten modification references. If the motor is too small to accommodate a modification plate, another form of indentifying modification shall be agreed wit
31、h the Approving Authority. Starting torque to rated torque: not less than1.25 for short-time rated motors, and not less than1.1 for continuously rated motors Pull-out torque to rated torque: not less than 1.5 Run-up torque i.e.the minimum torque occurring between pull-out and starting torque, to rat
32、ed torque: not less than1.1 a) b) c) d) vibration acceleration climatic test compass safe distance to the performance grading declared bythe manufacturer BS2G147-1:1966 BSI 01-2000 3 Section 3. Tests 17 General a) Tests shall be made to prove compliance with all requirements of this British Standard
33、. The tests required are as follows: the results obtained shall be recorded. Type tests. (Clauses18 to31) to be made on each design of motor. Production routine tests. (Clauses32 to36) to be made on every motor manufactured to this British Standard. Production quality tests. (Clauses37 to42) to be m
34、ade on batch sample or samples. b) The tests prescribed in Clauses18 to27 inclusive shall be performed in that order on the same motor. Similarly, tests in Clause28 shall be made on one motor, but not necessarily on the motor used for the tests referred to above, which shall previously have been sub
35、jected to the test in Subclause19 a). Other type tests may be made on another motor or motors. Every motor used for type test purpose shall previously have passed tests equivalent to the production routine tests. Tests shall be made at the maximum or minimum voltages specified in BS2G100-3 or in the
36、 individual specification. Unless otherwise specified, the tests shall be made at a temperature of20 5 C, any departure from this temperature being recorded. Type tests 18 Resistance test The resistance of the windings shall be measured and the values corrected to20 C. 19 Load tests a) The current,
37、input power and speed shall be recorded over a range of output torques from zero to pull-out torque for nominal voltage and frequency and for minimum voltage and maximum frequency. At rated load and balanced terminal voltage, the maximum difference between line currents shall not be greater than10pe
38、r cent of the average of the three currents. b) On motors supplied complete with gears, the test in a) shall be repeated with the gearing removed. The efficiency of the gearing at the various torques shall be derived and plotted. 20 Starting test With the rotor just turning, measurements of current,
39、 input power and torque shall be recorded and the values plotted over a range of applied voltage from zero to nominal at maximum frequency. Care should be taken that the motor does not overheat during this test. 21 Run-up torque test The run-up torque shall be recorded at minimum voltage and maximum
40、 frequency. 22 Temperature test Continuously running motors shall be tested under the worst conditions of temperature and altitude. They shall be run at rated torque and at minimum voltage and maximum frequency until steady temperature conditions are reached. Short-time rated motors shall be run at
41、normal ambient temperature at rated torque and at minimum voltage and maximum frequency for a period equal to110per cent of the time rating of the motor. Motors up to1.8 in frame diameter shall be tested on the appropriate standard mounting plate which shall be held vertically on a base of heat-insu
42、lating material. The motor shall be held on the plate by the normal mounting means. The plate shall be polished aluminium alloy and shall have the following dimensions: Where applicable, coolant flow shall be maintained at the agreed rate and maximum temperature uninfluenced by the method of loading
43、, and the pressure drop shall be recorded. Nominal frame size Hole at centre of plate Sides of plate Thickness of plate in mm in +0.001 0 mm in mm in mm 0.7 0.8 0.9 1.1 1.3 1.5 1.8 17.8 20.3 22.9 27.9 33.0 38.1 45.7 0.501 0.501 0.501 1.001 1.157 1.313 1.563 12.7 12.7 12.7 25.4 29.4 33.4 39.7 1.875 2
44、.250 2.700 3.200 3.750 4.300 5.250 47.6 57.2 68.6 81.3 95.3 109.2 133.4 0.1250 0.1250 0.1250 0.1250 0.1875 0.1875 0.1875 3.2 3.2 3.2 3.2 4.8 4.8 4.8BS2G147-1:1966 4 BSI 01-2000 23 Cold test The motor shall be brought to the declared minimum ambient operating temperature throughout. While at this tem
45、perature the motor shall be placed in a humidity chamber controlled at not less than95 per cent humidity at any temperature between15 C and25 C until the hoar frost formed on the motor has liquefied. As soon as this has occurred the motor shall be returned to the cold chamber and brought again to th
46、e declared minimum ambient temperature. It shall then be started and operated at rated torque and minimum voltage and maximum frequency until it reaches constant speed. The approximate time taken to reach constant speed shall be noted. 24 Hot test The motor shall be brought to the declared maximum a
47、mbient operating temperature throughout and then run at minimum voltage and maximum frequency and rated torque for its time rating, or for30 minutes if it is continuously rated. During the test the current and input power of the motor shall be recorded. 25 Overspeed test Continuously running motors
48、shall be run at rated torque and nominal voltage and frequency for half an hour followed immediately by a period of three minutes at125 per cent of the nominal synchronous speed at no load, without excessive noise or vibration. For short-time rated motors the three-minute run shall be commenced with
49、 the motor cold. The motor shall be subjected to the test in Clause26 and shall then be stripped and examined and there shall be no signs of movement of the rotor parts or of damage to the stator or rotor. 26 Insulation resistance tests While the windings are still hot from the tests in Clause25 the motor shall be subjected to insulation resistance tests in accordance with BS2G100-2, except that the resistance between live parts and the frame shall not be less than10 meghoms. 27 Endurance tests a) The principal components shall be dimensionally checked
