MT/T 1041.4-2011 PDF in English
MT/T 1041.4-2011 (MT/T1041.4-2011, MTT 1041.4-2011, MTT1041.4-2011)
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Specification for adjustable speed electrical equipment of shearer. Part 4: Switched reluctance drive
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Standards related to (historical): MT/T 1041.4-2011
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MT/T 1041.4-2011: PDF in English (MTT 1041.4-2011) MT/T 1041.4-2011
MT
COAL INDUSTRY STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 73.100.99
D 98
Record no.. 31844-2011
Specification for adjustable speed electrical equipment
of shearer – Part 4. Switched reluctance drive
ISSUED ON. APRIL 12, 2011
IMPLEMENTED ON. SEPTEMBER 1, 2011
Issued by. State Administration of Work Safety of the People's Republic
of China
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 5
4 Requirements... 5
5 Test methods ... 15
6 Inspection rules ... 24
7 Marking ... 26
Bibliography ... 28
Specification for adjustable speed electrical equipment
of shearer – Part 4. Switched reluctance drive
1 Scope
This Part of MT/T 1041 specifies the requirements, test methods, inspection rules and
marking for switched reluctance drive of shearer’s travel unit.
This Part applies to on-board and off-board switched reluctance drive of shearer’s
travel unit (hereinafter referred to as switched reluctance drive).
2 Normative references
The following referenced documents are indispensable for the application of this
document. For dated references, only the edition dated applies to this document. For
undated references, the latest edition of the referenced documents (including all
amendments) applies to this document.
GB/T 2423.4-2008, Environmental testing for electric and electronic products –
Part 2. Test method – Test Db. Damp heat, cyclic ( 12h+12h cycle)
GB 3836.1-2000, Electrical apparatus for explosive gas atmospheres – Part 1.
General requirements
GB 3836.2-2000, Electrical apparatus for explosive gas atmospheres – Part 2.
Flameproof enclosure d
GB 3836.4-2000, Electrical apparatus for explosive gas atmospheres – Part 4.
Intrinsic safety i
GB 4208-2008, Degrees of protection provided by enclosure (IP code)
GB 8286-2005, Mining flameproof movable substations
GB/T 12668.2-2002, Adjustable speed electrical power drive systems – Part 2.
General requirements – Rating specifications for low voltage adjustable frequency
a.c. power drive systems
GB/T 12668.3-2003, Adjustable speed electrical power dive systems – Part 3.
EMC product standard including specific test methods
4.3.1 Flameproof enclosure
4.3.1.1 The enclosure of switched reluctance drive shall be manufactured using steel
plates or cast steel.
4.3.1.2 The joining surfaces of the flameproof enclosure of switched reluctance drive
shall be as specified in Clause 5 of GB 3836.2-2000.
4.3.1.3 The flameproof performance of the enclosure of switched reluctance drive shall
be as specified in GB 3836.2-2000, which is capable of withstanding the enclosure
pressure test specified in 15.1, and the non-propagation explosion test of internal
ignition specified in 15.2, of GB 3836.2-2000.
4.3.1.4 The enclosure of switched reluctance drive shall be subjected to the static
pressure test according to 15.1.2.1 or 16.3 of GB 3836.2-2000, after finish machining.
There shall be no structural damage in the enclosure during the test, not any
permanent deformation which may influence the flameproof performance.
4.3.2 Cable entry device
4.3.2.1 The cable entry device of switched reluctance drive shall be as specified in
Clause 16 of GB 3836.1-2000 and Clause 12 of GB 3836.2-2000.
4.3.2.2 The cable entry device of switched reluctance drive shall be capable of
withstanding the clamping test specified in Annex D to GB 3836.1-2000 and the
flameproof cable entry device test specified in Annex D to GB 3836.2-2000.
4.3.2.3 The rubber sealing ring of the cable entry device of switched reluctance drive
shall be capable of withstanding the ageing test of elastic sealing ring materials
specified in Annex D to GB 3836.1-2000.
4.3.3 Terminal blocks and terminal compartments
4.3.3.1 The terminal compartments and the terminal blocks in the terminal
compartments of switch reluctance drive shall be as specified in Clause 14 of GB
3836.1-2000.
4.3.3.2 The insulated bushings of the terminal blocks of switched reluctance drive shall
be as specified in Clause 11 of GB 3836.1-2000.
4.3.4 Viewing window (display window) and clear parts of flameproof enclosure
4.3.4.1 The installation of the flameproof enclosure’s viewing window (display window)
and the materials of clear parts shall be as specified in Clause 8 of GB 3836.2-2000.
4.3.4.2 The clear parts shall be capable of withstanding the impact test specified in
23.4.3.1 of GB 3836.1-2000.
ne – the rotational speed when the output torque of switched reluctance drive is the
rated torque at the same given output rotational speed corresponding to n10, in r/min;
nemax – when the given output rotational speed is not greater than the rated rotational
speed, it is the rated rotational speed; when the given output rotational speed is greater
than the rated rotational speed, it is 120% of the rated rotational speed, in r/min.
4.4.3.4 Speed regulation properties of constant torque and constant power
Switched reluctance drive shall be designed that 100 r/min ~ the rated rotational speed
is the constant-torque speed regulation segment (corresponding to the working traction
speed) and that greater than the rated rotational speed ~ 120% of the rated rotational
speed is the constant power speed regulation segment (corresponding to the working
traction speed).
The speed regulation properties of switched reluctance drive within the specified speed
regulation range shall be as specified in Item 3 of Table 5 of MT/T 81-1998, i.e. within
the constant torque speed regulation segment of 100 r/min ~ the rated rotational speed,
its output torque shall achieve the rated torque (with the tolerance of + 8% ~ -3% of
the rated value), and the rotational speed shall decrease automatically when
exceeding the rated rotational speed; within the constant power speed regulation
segment above the rated rotational speed, its output power shall achieve the rated
power (with the tolerance of + 8% ~ -3% of the rated value), i.e. its output torque shall
achieve the torque converted from the rated power and output rotational speed, and
the rotational speed shall decrease automatically when exceeding the rated power.
4.4.4 Deceleration time
Switched reluctance drive shall be capable of reducing its motor’s rotational speed
from the rated rotational speed to zero within 10 s, and its d.c. return circuit will not
generate overvoltage alarms.
4.4.5 Double-quadrant operation
Switched reluctance drive shall have the double-quadrant operation function at least
and shall meet the requirements specified in 4.4.3 and 4.4.4 in the two directions of
forward direction (quadrant I) and reverse direction (quadrant III).
4.4.6 Four-quadrant operation
Switched reluctance drive of four-quadrant operation shall meet the requirements of
4.4.3 and 4.4.4 in quadrants I and III. In addition, it shall also have the re-generation
(braking) function in quadrants II and IV and specify its braking toque (braking power)
in relevant product standards. The speed regulation properties in the braking operating
state shall be as specified in 4.4.3; the braking toque (braking power) shall not be lower
than the specified value.
the test required by electromagnetic emission as specified in Clause 6 of GB 12668.3-
2003.
4.4.13 Cooling water channel
4.4.13.1 The cooling water channel of switch reluctance drive with the enclosure water
cooling shall be designed properly with adequate heat exchange, ensuring cooling
water flows smoothly. When the flow of cooling water achieves the design requirement,
the pressure drop at the inlet-outlet shall not be greater than 0.3 MPa.
4.4.13.2 Cooling water channel shall be capable of withstanding the hydraulic test of
1.5 times of the maximum working pressure, without leakage and detrimental
deformation.
4.5 Appearance
4.5.1 The paint on the surface of switched reluctance drive shall be dry and full.
4.5.2 All black metallic parts (except the working surface of electromagnet) shall be
provided with reliable rustproof measures. All metallic parts shall be free from cracks,
coating peel-off, etc. The surface of plastic parts shall be smooth without bubbles,
cracks and pits.
4.5.3 The marking shall be complete.
5 Test methods
5.1 Flameproof enclosure test
5.1.1 Enclosure flameproof joining surface inspection
As specified in Clause 5 of GB 3836.2-2000.
5.1.2 Enclosure pressure-tight test
As specified in 15.1 of GB 3836.2-2000.
5.1.3 Enclosure non-propagation explosion test of internal ignition
As specified in 15.2 of GB 3836.2-2000.
5.1.4 Enclosure static pressure test
As specified in 15.1.2.1 or 16.3 of GB 3836.2-2000.
5.2 Cable entry device
When the dielectric property test of the main loop (not including power semiconductor)
is carried out for switched reluctance drive, the test voltage is applied to.
a) between all live parts and other bare conductive parts connected with each other;
b) between each pole and all other poles connected to bare conductive parts
connected with each other for the test.
At the start of application, the test voltage shall not exceed 50% of the specified value
of 4.4.1.2 of MT/T 1041.1-2007; then increase the test voltage steadily to the value
specified in 4.4.1.2 of MT/T 1041.1-2007. The test voltage is actually of sinusoidal
wave; the frequency is between 45 Hz ~ 62 Hz. The test power supply shall have a
sufficient power to maintain the test voltage; the time of applying the test voltage is 1
min.
5.8 Test of operating functions and display function
5.8.1 Operate “start” and “stop” for three times respectively for switched reluctance
drive; observe the details of “start” and “stop” of switched reluctance drive and the
display details of corresponding working states.
5.8.2 Set “forward direction” and “reverse direction” for three times respectively for
switched reluctance drive; observe the rotational direction of the motor and whether
the display of “shearer travel direction” of switched reluctance drive is consistent with
the setting.
5.8.3 Increase the rotational speed setting of switched reluctance drive from some
lower rotational speed to some higher rotational speed; observe the rotational speed
increase of the motor and whether the display of “given rotational speed of shearer
travel motor” of switched reluctance drive is normal. Likewise, decrease the rotational
setting of switched reluctance drive from some higher rotational speed to some lower
rotational speed; observe the rotational speed decrease of the motor and whether the
display of “given speed of shearer travel motor” of switched reluctance drive is normal.
5.9 Temperature rise test
5.9.1 Loading method for temperature rise test
The temperature rise test shall be carried out under the service conditions specified in
4.2 and the power conditions with the supply voltage of 95% ~ 115% of the rated
voltage. The output rotational speed of switched reluctance drive is set at the rated
rotational speed; use the method to apply a direct load to the motor to make its output
torque be the rated torque (i.e. the current of all parts of switched reluctance drive
achieves the rated current). The test duration shall be sufficient to make the
temperature to increase to a stabilized value. When the temperature variation per hour
does not exceed 1 K, it is deemed that the temperature achieves a stabilized value.
rated value. Set the output rotational speed of switched reluctance drive at the rated
rotational speed; operate under no load for 1 h; measure 12 values of the motor
rotational speed at the time interval of 5 min; take the maximum and minimum values
among them; obtain the speed stability accuracy of switched reluctance drive
according to 4.4.3.2.
5.10.1.2 The input supply voltage of switched reluctance drive is 95% ~ 110% of the
rated value. Set the output rotational speed of switched reluctance drive at 100 r/min;
operate under no load for 1 h; measure 12 values of the motor rotational speed at the
time interval of 5 min; take the maximum and minimum values among them; obtain the
speed stability accuracy of switched reluctance drive according to 4.4.3.2.
5.10.1.3 The input supply voltage of switched reluctance drive is 95% ~ 110% of the
rated value. Set the output rotational speed of switched reluctance drive at the
maximum rotational speed; operate under no load for 1 h; measure 12 values of the
motor rotational speed at the time interval of 5 min; take the maximum and minimum
values among them; obtain the speed stability accuracy of switched reluctance drive
according to 4.4.3.2.
5.10.2 Speed variation test
5.10.2.1 The input supply voltage of switched reluctance drive is 95% ~ 110% of the
rated value. Set the output rotational speed of switched reluctance drive at the rated
rotational speed; measure the rotational speed when the motor operates under no load
(or 10% of the rated torque) and the rotational speed of its operation at the rated torque.
Calculate to obtain the rotational speed variation of switched reluctance drive at the
rated rotational speed according to 4.4.3.3.
5.10.2.2 The input supply voltage of switched reluctance drive is 95% ~ 110% of the
rated value. Set the output rotational speed of switched reluctance drive at 100 r/min;
measure the rotational speed when the motor operates under no load (or 10% of the
rated torque) and the rotational speed of its operation at the rated torque. Calculate to
obtain the rotational speed variation of switched reluctance drive at 100 r/min
according to 4.4.3.3.
5.10.2.3 For switched reluctance drive with the speed regulation performance of
constant power, when its input supply voltage is 95% ~ 110% of the rated value, set
the output rotational speed of switched reluctance drive at 120% of the rated rotational
speed; measure the rotational speed when the motor operates under no load (or 10%
of the rated power) and the rotational speed of its operation under the rated power.
Calculate to obtain the rotational speed variation of switched reluctance drive at 120%
of the rated rotational speed according to 4.4.3.3.
5.10.3 Speed regulation performance test of constant torque and constant power
5.10.3.1 Constant torque speed regulation performance test
5.13.2 Set the output rotational speed of switched reluctance drive at 100 r/min and
drive the motor to operate. The test method is as above.
5.13.3 For switched reluctance drive with the speed regulation performance of
constant power, set the output rotational speed of switched reluctance drive at 120%
of the rated rotational speed and drive the motor; regulate the loading device of the
motor to make it work in quadrant II, i.e. the regeneration (braking) state; increase the
load slowly until the braking power achieves the power specified in relevant product
standards; then decrease the load slowly to no load; measure and record the rotational
speed and torque of the motor. During the test, the input supply voltage of switched
reluctance drive is 95% ~ 110% of the rated value.
5.14 Overload capacity test
The input supply voltage of switched reluctance drive is 95% ~ 110% of the rated value;
set the output rotational speed of switched reluctance drive at the rated rotational
speed and drive the motor to operate; after operating continuously under the rated
output current, increase the load of the motor gradually until the output current of
switched reluctance drive achieves the overload current specified in 4.4.8. Within the
time specified in 4.4.8, switched reluctance drive shall operate normally. Before the
test, first regulate the control values of constant torque and constant power of switched
reluctance drive to greater than its overload current acting value.
5.15 Supply voltage adaptive capacity test
In the two cases where the input supply voltage of switched reluctance drive is 85% of
the rated voltage and 115% of the rated voltage, carry out the test of operating
functions and display and the no-load operation of switched reluctance drive according
to 5.8. Switched reluctance drive shall start and stop normally; the no-load operation
is normal; the setting of “forward direction”, “reverse direction” and rotational speed
can be conducted.
5.16 Protection test
5.16.1 Overvoltage and undervoltage protection test
In the case where the input supply voltage is the rated voltage, switched reluctance
drive operates at any rotational speed under a light load; increase the input supply
voltage gradually until it exceeds the upper limit of the supply voltage range of switched
reluctance drive; check its action details of overvoltage protection.
In the case where the input supply voltage is the rated voltage, switched reluctance
drive operates at any rotational speed under a light load; decrease the input supply
voltage gradually until it is lower than the lower limit of the supply voltage range of
switched reluctance drive; check its action details of undervoltage protection.
protection; in the case where the input supply voltage is the rated voltage, make
switched reluctance drive to start the motor at the rated rotational speed and operate
under a light load; decrease the resistance of the resistance box until its earth leakage
protection is started; power down the motor to stop operation; record the acting value
of earth leakage protection.
Carry out the test respectively at the rotational speed of 100 r/min and the maximum
rotational speed using the above-mentioned method.
5.16.7 Overspeed protection test
In the case where the input supply voltage is the rated voltage, switched reluctance
drive operates at any rotational speed under a light load; simulate the signals when
the rotational speed of shearer traction motor exceeds the acting value of overspeed
protection; input signals to switched reluctance drive; check the action details of
protection.
5.16.8 Overheat protection test of electric and electronic devices
Simulate the output signals of the overheat protection sensor of electric and electronic
devices; input the overheat signals of electric and electronic devices to the overheat
protection circuit of switched reluctance drive; check its action details of overheat
protection.
5.16.9 Short-circuit protection
Put all the power output ends (except the braking phase) of switched reluctance drive
in short circuits to each other; in the case where the input supply voltage is the rated
voltage, switched reluctance drive starts operation; check its action details of short-
circuit protection.
5.16.10 Wiring error protection of motor position sensor
Disconnect any wire or misconnect any two wires randomly between the speed
controller of switched reluctance drive and the motor position sensor; start the motor
under no load; after not more than 10 s, check its action details of error protection of
the position sensor.
5.17 Cyclic damp heat test
The cyclic damp heat test is as specified in GB/T 2423.4-2008.
5.18 Electromagnetic compatibility test
The electromagnetic emission reliability verification test of switched reluctance drive
without a special power transformer is as specified in Clause 6 of GB 12668.3-2003.
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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