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1、BRITISH STANDARD BS 2G 147-2:1966 Specification for A.C. motors for aircraft Part 2: Three-phase variable frequency squirrel-cage induction motors UDC 629.13.066:621.313.333.2.025.3 Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 14:14:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2G 147-2
2、:1966 This British Standard, having been approved by the Aerospace Industry Standards Committee and endorsed by the Chairman of the Engineering Divisional Council, was published under the authority of the General Council of the Institution on 12 December 1966 BSI 01-2000 The following BSI references
3、 relate to the work on this Standard: Committee reference ACE/42 Draft for comment 66/7396 ISBN 0 580 34073 2 Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 14:14:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2G 147-2:1966 BSI 01-20
4、00i Contents Page Forewordii 1Scope1 2Definitions1 Section 1. General requirements 3Design and construction1 Section 2. Particular requirements 4Supply voltage and frequency1 5Overhaul periods1 6Rotation1 7Rating1 8Cooling1 9Performance2 10Mounting and drive2 11Vibration, acceleration, climatic proo
5、fing and compass safe distance2 12Explosion-proofness2 13Fire resistance2 14Waterproofing2 15Declaration of performance2 16Nameplate2 Section 3. Tests 17General3 18Resistance test3 19Load tests3 20Starting test3 21Run-up torque test3 22Temperature test3 23Cold test4 24Hot test4 25Overspeed test4 26I
6、nsulation resistance test4 27Endurance tests4 28Acceleration, vibration and climatic tests5 29Waterproofing tests5 30Explosion-proofness test5 31Fire resistance test5 32Component check5 33Overspeed test5 34Load test5 35Starting torque test5 36Insulation tests5 37Selection of samples6 38Load tests6 3
7、9Starting test6 40Run-up torque test6 41Endurance tests6 42Dimensional check for wear6 Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 14:14:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2G 147-2:1966 ii BSI 01-2000 Foreword This standard has been prepared as part of a programme of work to
8、 bring the aircraft series British Standards for rotating machines up to date in relation to present-day and probable future requirements, and to experience 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. mot
9、ors for aircraft applications in a series of separate Parts. Part 1, being a revision of BS G 147:1955, deals with constant frequency motors, and Part 2 with variable frequency motors. Reference is made in the standard to the following British Standards: BS 2G 100, General requirements for electrica
10、l equipment and indicating instruments for aircraft. BS G 102, General requirements for rotating electrical machines for aircraft1). NOTEWhere metric equivalents are given, the figures in British units are to be regarded as the standard. The metric conversions are approximate. More accurate conversi
11、ons should be based on the tables in BS 350, “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 application. Compliance with a British Standard does not of itself con
12、fer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 6 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment tab
13、le on the inside front cover. 1) In course of preparation. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 14:14:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2G 147-2:1966 BSI 01-20001 1 Scope This part of BS G 147 covers the general design and test procedure for three-phase variable freq
14、uency a.c. squirrel-cage induction motors for use in aircraft, other than motors classed as engine starter motors. 2 Definitions For the purposes of this part of BS G 147 the following definitions apply: 2.1 motor the term “motor” includes gears supplied with the motor 2.2 type motor a motor represe
15、ntative of others identical in design, construction and rating 2.3 rating the operating limitations assigned to the motor by the manufacturer 2.4 rated speeds and torques the speeds and torques declared by the manufacturer for nominal voltage and for specific frequencies, as required by the purchase
16、r. Generally these values should be quoted for maximum, minimum, and nominal frequency 2.5 time rating the time for which the motor can be operated at rated torque without exceeding the safe temperature Section 1. General requirements 3 Design and construction The design and construction of the moto
17、r shall comply with the relevant requirements of BS 2G 100 and BS G 102. Section 2. Particular requirements 4 Supply voltage and frequency a) The motor shall be suitable for use on supplies with a line voltage as specified in BS 2G 100-32), and a variable frequency as specified by the purchaser. b)
18、Unless otherwise agreed, the nominal frequency shall be 400 Hz. 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 be to achieve 3 000 (
19、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 the direction of rot
20、ation 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 at some specific frequencies; preferably, these should be maximum, minimum and nominal frequency. Time ratings for the declared ambient tempe
21、ratures shall be stated. The manufacturer shall declare any limitation 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 of a motor shall be agreed between the manufacturer and the purchaser. NOTESh
22、ort-time rated motors are generally required to be capable of performing at least 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
23、 without exceeding the safe temperature. For actuators this means six operations of the motor. 8 Cooling a) The manufacturer and purchaser shall agree upon the cooling arrangements to be provided for the motor. 2) BS 2G 100-3:1960 is being revised to include requirements for variable frequency a.c.
24、systems. a) continuous duty1 500 hours operation b) frequent duty (e.g. with an inching actuator) 75 hours total running 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 appro
25、priate Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 14:14:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2G 147-2:1966 2 BSI 01-2000 b) Cooling connections shall comply with the requirements of BS G 102. 9 Performance a) There should preferably be no limitation in the performance of the
26、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: Starting current at maximum voltage and minimum frequ
27、ency shall not exceed six times the full-load current specified for this particular frequency. 10 Mounting and drive The mounting and drive of the motor shall comply with the requirements of BS G 102. 11 Vibration, acceleration, climatic proofing and compass safe distance The motor shall comply with
28、 the requirements of BS 2G 100-2 in respect of: 12 Explosion-proofness If specified by the individual specification the motor shall comply with the requirements of BS 2G 100-2 for explosion-proof equipment. Motors ventilated other than by clean air shall comply with these requirements whilst running
29、. 13 Fire resistance A motor which is to be installed within a potential fire zone and which must function during or after a fire, shall comply with the appropriate requirements of BS 2G 100-2, in respect of fire resistance, as declared by the manufacturer. 14 Waterproofing If required by the indivi
30、dual specification, the motor shall comply with the requirements of the Grade A or Grade B water-proofness tests of BS 2G 100-2, as declared by the manufacturer. 15 Declaration of performance In addition to the declarations required by BS 2G 100, the following information shall be provided by the ma
31、nufacturer in regard to the motor: a) Rated torque(s), speed(s), direction of rotation, currents and power factors at maximum, minimum and nominal frequency. b) Time ratings at the frequencies stated in a). c) Cooling requirements at the frequencies stated in a). d) Starting, run-up and pull-out tor
32、que 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 possible, a modification plate shall be mounted on the body of the motor. b) The following information shall be marked on the nameplate
33、: Manufacturers name or identification Serial number Type (or part) number Stores reference number, when applicable c) If possible, the following information should also be marked on the nameplate: Voltage and frequency range Number of phases Speed range Output in watts at maximum and minimum freque
34、ncy Time rating Starting torque to rated torque: not less than 1.25 for short-time rated motors, and not less than 1.1 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 rated torqu
35、e: not less than 1.1 a) vibration to the performance grading declared by the manufacturer b) acceleration c) climatic test d) compass safe distance Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 14:14:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2G 147-2:1966 BSI 01-20003 d) The modifica
36、tion plate shall provide for ten modification references. If the motor is too small to accommodate a modification plate, another form of identifying modification shall be agreed with the Approving Authority. Section 3. Tests 17 General a) Tests shall be made to prove compliance with all requirements
37、 of this British Standard. The tests required are as follows: the results obtained shall be recorded. Type tests. (Clauses 18 to 31) to be made on each design of motor. Production routine tests. (Clauses 32 to 36) to be made on every motor manufactured to this British Standard. Production quality te
38、sts. (Clauses 37 to 42) to be made on batch sample or samples. b) The tests prescribed in Clauses 18 to 27 inclusive shall be performed in that order on the same motor. Similarly, tests in Clause 28 shall be made on one motor, but not necessarily on the motor used for the tests referred to above, wh
39、ich shall previously have been subjected to the test in Clause 19 a). Other type tests may be made on another motor or motors. Every motor used for type test purposes shall previously have passed tests equivalent to the production routine tests. Tests shall be made at the maximum or minimum voltages
40、 specified in BS 2G 100-3 or in the individual specification. Unless otherwise specified, the tests shall be made at a temperature of 20 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 to
41、 20 C. 19 Load tests a) The current consumption, power factor and speed shall be recorded over a range of output torques from zero to pull-out torque for the three following input conditions: i) Maximum voltage and minimum frequency. ii) Nominal voltage and nominal frequency. iii) Minimum voltage an
42、d maximum frequency. At rated load and balanced terminal voltage, the maximum difference between line currents shall not be greater than 10 per 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 efficie
43、ncy of the gearing at the various torques shall be derived and plotted. 20 Starting test With the rotor just turning, measurements of current, input power and torque shall be recorded and the values plotted over a range of applied voltage from zero to nominal at maximum frequency. The starting curre
44、nt at maximum voltage and minimum frequency shall be checked. 21 Run-up torque test The run-up torque shall be recorded at minimum voltage and maximum frequency. 22 Temperature test Continuously rated motors shall be tested under the worst conditions of temperature and altitude. They shall be run co
45、ntinuously at their rated torques corresponding to minimum voltage and maximum frequency and to maximum voltage and minimum frequency respectively until steady temperature conditions are reached. Short-time rated motors shall be run at normal ambient temperature at their rated torques corresponding
46、to minimum voltage and maximum frequency and maximum voltage and minimum frequency respectively for a period equal to 110 per cent of the time rating(s) of the motor. Motors up to 1.8 in frame diameter shall be tested on the appropriate standard mounting plate which shall be held vertically on a bas
47、e of heat-insulating material. The motor shall be held in position by the normal mounting means. The plate shall be polished aluminium alloy and shall have the following dimensions: Nominal frame size Hole at centre of plate Sides of plate Thickness of plate inmminmminmminmm 0.7 0.8 0.9 1.1 1.3 1.5
48、1.8 17.8 20.3 22.9 27.9 33.0 38.1 45.7 + 0.001 0 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 2.250 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 4.8 Licensed Copy: she
49、ffieldun sheffieldun, na, Tue Nov 28 14:14:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2G 147-2:1966 4 BSI 01-2000 Where applicable, coolant flow shall be maintained at the agreed rate and maximum temperature uninfluenced by the method of loading, and the pressure drop shall be recorded. 23 Cold test The motor shall be brought to the declared minimum ambient operating temperature throughout. While at this temperature the motor shall be placed in a humidity chamber controlled at not less than 95 per cent humidity at any temperature between 15 C and 25 C