AC Motors

Target Scope

AC motors (limited to three-phase, cage-induction motors), except the following:

1) ones of explosion-proof type,

2) ones other than those satisfying all of the following conditions from a to g:

　 a. having a rated frequency or a base frequency of 50Hz±5%, 60Hz±5% or both 50Hz±5% and 60Hz±5% compatible,

　 b. operating in a single speed,

　 c. having a rated voltage of 1,000V or less,

　 d. having a rated output from 0.75kW or more up to 375 kW,

　 e. having either 2, 4, or 6 poles,

　 f. either whose duty type corresponds to S1 defined in JIS C 4034-30 (2011) or whose duty type corresponds to S3 with a duty hour rate of 80% or higher, and

　 g. driven by a commercial power supply.

3) ones integrated into a product (excluding models for export) which cannot be detached to measure energy consumption efficiency according to the method specified in Energy Conservation Law, Article 80, ltem 1, Section a,

4) ones whose thermal class corresponds to 180 (H), 200 (N), 220 (R) or 250 specified in JIS C 4003 (2010),

5) ones which have a delta-star starting system,

6) ones designed for vessels or ocean structures,

7) ones designed to operate wholly immersed in liquid,

8) ones of which difference between the synchronous speed and the rotational speed of the rotor meets the following:

　 a. 5% or more in a case where the output is 0.75 kW or more and 110 kW or less,

　 b. 3% or more in a case where the output is over 110 kW and 375 kW or less.

9) ones designed for gates of dam or weir,

10) ones whose stators and rotors are covered with metal materials,

11) ones designed for extremely low ambient air temperatures, specifically at temperature of less than -20 °C,

12) ones of external fan cooling types among inverter-driven models, or

13) ones manufactured for incorporation in products for exportation.

Energy Consumption Efficiency

A numeric value (%) obtained by dividing output (W) ^*1 by input (W) using the numeric values measured by the method stipulated in JIS C 4034-2-1

*1: A value obtained by subtracting total loss from input.

Categories & Target Standard Values

In the target fiscal year and each subsequent fiscal year, for each category, the weighted average value obtained by weighting energy consumption efficiency by shipment volume shall not be below the target standard value.

Table 1. Standard Energy Consumption Efficiency in Each Category

Category			[Target standard value] Standard energy consumption efficiency
Category name	Rated frequency or base frequency	Rated output
1	60Hz	0.75 kW or more and less than 0.925 kW	85.5
2		0.925 kW or more and less than 1.85 kW	86.5
3		1.85 kW or more and less than 4.6 kW	89.5
4		4.6 kW or more and less than 9.25 kW	91.7
5		9.25 kW or more and less than 13 kW	92.4
6		13 kW or more and less than 16.75 kW	93.0
7		16.75 kW or more and less than 26 kW	93.6
8		26 kW or more and less than 33.5 kW	94.1
9		33.5 kW or more and less than 41 kW	94.5
10		41 kW or more and less than 50 kW	95.0
11		50 kW or more and less than 100 kW	95.4
12		100 kW or more and less than 130 kW	95.8
13		130 kW or more and 375 kW or less	96.2
14	50Hz	0.75 kW	82.5
15		1.1 kW	84.1
16		1.5 kW	85.3
17		2.2 kW	86.7
18		3 kW	87.7
19		4 kW	88.6
20		5.5 kW	89.6
21		7.5 kW	90.4
22		11 kW	91.4
23		15 kW	92.1
24		18.5 kW	92.6
25		22 kW	93.0
26		30 kW	93.6
27		37 kW	93.9
28		45 kW	94.2
29		55 kW	94.6
30		75 kW	95.0
31		90 kW	95.2
32		110 kW	95.4
33		132 kW	95.6
34		160 kW	95.8
35		200 kW or more and 375 kW or less	96.0
36		Other	Refer to Remarks 2.

Remarks:

The evaluation is made using the numeric value obtained by multiplying the coefficients a to f set forth in Table 2 and Table 3 by the energy consumption efficiency obtained by measurement, respectively, and rounding to the nearest tenth.
For outputs other than the rated outputs set forth in Table 2 (60Hz), if the output in question is equal to or higher than the middle point between two of the rated outputs set forth in Table 2 which are one class higher and lower than the output in question, the coefficients a to c of the lower rated output shall be used.

Table 2. Coefficient of Each Output of 60Hz

Rated output [Kilowatts]	2 poles	4 poles	6 poles
Rated output [Kilowatts]	Coefficient a	Coefficient b	Coefficient c
0.75	1.1104	1.0000	1.0364
1.1	1.0298	1.0000	0.9886
1.5	1.0117	1.0000	0.9774
2.2	1.0347	1.0000	1.0000
3.7	1.0113	1.0000	1.0000
5.5	1.0246	1.0000	1.0077
7.5	1.0166	1.0000	1.0077
11	1.0154	1.0000	1.0076
15	1.0220	1.0000	1.0142
18.5	1.0207	1.0000	1.0065
22	1.0207	1.0000	1.0065
30	1.0184	1.0000	1.0000
37	1.0161	1.0000	1.0043
45	1.0150	1.0000	1.0053
55	1.0192	1.0000	1.0095
75	1.0138	1.0000	1.0042
90	1.0042	1.0000	1.0042
110	1.0084	1.0000	1.0000
150	1.0084	1.0000	1.0042
185～375	1.0042	1.0000	1.0042

Table 3. Coefficient of Each Output of 50Hz

Rated output [Kilowatts]	2 poles	4 poles	6 poles
Rated output [Kilowatts]	Coefficient d	Coefficient e	Coefficient f
0.75	1.0223	1.0000	1.0456
1.1	1.0169	1.0000	1.0383
1.5	1.0131	1.0000	1.0339
2.2	1.0093	1.0000	1.0285
3	1.0069	1.0000	1.0245
4	1.0057	1.0000	1.0207
5.5	1.0045	1.0000	1.0182
7.5	1.0033	1.0000	1.0146
11	1.0022	1.0000	1.0122
15	1.0022	1.0000	1.0099
18.5	1.0022	1.0000	1.0098
22	1.0032	1.0000	1.0087
30	1.0032	1.0000	1.0075
37	1.0021	1.0000	1.0064
45	1.0021	1.0000	1.0053
55	1.0032	1.0000	1.0053
75	1.0032	1.0000	1.0042
90	1.0021	1.0000	1.0032
110	1.0021	1.0000	1.0032
132	1.0021	1.0000	1.0021
160	1.0021	1.0000	1.0021
200～375	1.0021	1.0000	1.0021

The standard energy consumption efficiency E of Category 36 set forth in Table 1 shall be calculated using the following formula.
E= A₀×(log₁₀(P_N/P_C))³+B₀×(log₁₀(P_N/P_C))²+C₀×log₁₀(P_N/P_C)+D₀
Here, E: Standard energy consumption efficiency (unit: percent)
　　　P_N: Rated output (unit: kilowatts)
　　　P_C: 1 (unit: kilowatts)
　　　A₀: 0.0773, B₀: －1.8951, C₀: 9.2984, D₀: 83.7025 (interpolation coefficients)
However, for those whose number of poles is 2 poles and 6 poles, the evaluation shall be made using the value calculated by multiplying the energy consumption efficiency obtained by measurement by coefficient g in the case of 2 poles, and by coefficient h in the case of 6 poles (rounding to the nearest tenth)
Coefficient g=（A₀×(log₁₀(P_N/P_C))³+B₀×8log₁₀(P_N/P_C))²+C₀×log₁₀(P_N/P_C)+D₀)/
　　　　　　　（A₁×(log₁₀(P_N/P_C))³+B₁×(log₁₀(P_N/P_C))²+C₁×log₁₀(P_N/P_C)+D₁)
Here, P_N: Rated output (unit: kilowatts)
　　　P_C: 1 (unit: kilowatts)
　　　A₁: 0.3569, B₁: －3.3076, C₁: 11.6108, D₁: 82.2503 (interpolation coefficients)
Coefficient h=（A₀×(log₁₀(P_N/P_C))³+B₀×(log₁₀(P_N/P_C))²+C₀×log₁₀(P_N/P_C)+D₀)/
　　　　　　　（A₂×(log₁₀(P_N/P_C))³+B₂×(log₁₀(P_N/P_C))²+C₂×log₁₀(P_N/P_C)+D₂)
Here, P_N: Rated output (unit: kilowatts)
　　　P_C: 1 (unit: kilowatts)
　　　A₂: 0.1252, B₂: －2.6130, C₂: 11.9963, D₂: 80.4769 (interpolation coefficients)

If shipment includes 3 ratings (6 ratings), for 200 V / 60Hz (400 V / 60Hz), the evaluation shall be made using the value obtained by multiplying the energy consumption efficiency obtained by measurement by each of the coefficients i to k set forth in Table 4, and rounding to the nearest tenth. For outputs other than the rated outputs set forth in Table 4 (60Hz), if the output in question is equal to or higher than the middle point between two of the rated outputs set forth in Table 4 which are one class higher and lower than the output in question, the coefficients i to k of the lower rated output shall be used.
The 3 ratings and 6 ratings are defined as follows:
3 ratings: 200 V / 50Hz, 200 V / 60Hz, 220 V / 60Hz, or 400 V / 50Hz, 400 V / 60Hz, 440 V / 60Hz
6 ratings: 200 V / 50Hz, 200 V / 60Hz, 220 V /60Hz, 400 V / 50Hz, 400 V / 60Hz, and 440 V / 60Hz

Table 4. Coefficient by Rated Output of 3 Ratings (6 Ratings)

Rated output [Kilowatts]	2 poles	4 poles	6 poles
Rated output [Kilowatts]	Coefficient i	Coefficient j	Coefficient k
0.75	1.1325	1.0130	1.0452
1.1	1.0485	1.0188	1.0023
1.5	1.0298	1.0188	0.9908
2.2	1.0468	1.0147	1.0170
3.7	1.0229	1.0147	1.0170
5.5	1.0362	1.0099	1.0246
7.5	1.0246	1.0099	1.0246
11	1.0244	1.0109	1.0221
15	1.0310	1.0142	1.0288
18.5	1.0286	1.0119	1.0207
22	1.0286	1.0119	1.0207
30	1.0262	1.0107	1.0107
37	1.0227	1.0107	1.0150
45	1.0215	1.0106	1.0128
55	1.0258	1.0032	1.0171
75	1.0192	1.0032	1.0117
90	1.0095	1.0032	1.0117
110	1.0138	1.0042	1.0074
150	1.0126	1.0042	1.0116
185～375	1.0084	1.0042	1.0116

In regards to the number of units shipped by a manufacturer, etc., if the shipment includes the 3 ratings (6 ratings) set forth in Remarks 3, the quantity ratios set forth in Table 5 shall be used to find the quantity of each rating. In the calculation, the first place after the decimal point is rounded off to obtain an integer value and, if it is necessary to adjust the fractional quantity, the adjustment shall be made by the rating whose quantity ratio is highest. In a case where the shipment does not include the 3 ratings (6 ratings), the quantity of respective ratings shall be used to find the shipment volume of the manufacturer, etc.

Table 5. Quantity Ratio of Each Voltage and Frequency of 3 Ratings (6 Ratings)
(1) 3 ratings of 200 V and 220 V

Rated voltage 200V 220V

Rated frequency 50Hz 60Hz

Quantity ratio 50% 30% 20%

(2) 3 ratings of 400 V and 440 V

Rated voltage 400V 440V

Rated frequency 50Hz 60Hz

Quantity ratio 50% 30% 20%

(3) 6 ratings of 200 V, 220 V, 400 V, and 440 V

Rated voltage 200V 220V 400V 440V

Rated frequency 50Hz 60Hz 50Hz 60Hz

Quantity ratio 40% 25% 10% 10% 5% 10%

Target Fiscal Year

FY2015 and each subsequent fiscal year

Energy Efficiency Improvement

Energy consumption efficiency is expected to be improved by about 7.4% compared with the FY2010 level in the target fiscal year (FY2015).

Display Items

●Product name

●Rated output

●Number of poles

●Rated voltage

●Rated frequency or base frequency

●Duty type

●Energy consumption efficiency

●Efficiency class

●Name of manufacturer, etc.

Display Location

Display items shall be presented at locations where they can be readily noticed on product bodies and also in catalogs showing performance indications or documents provided by the manufacturer for product selection.

Requirement for Recommendations and Orders

Manufacturers or importers whose annual manufacturing volume or importing volume (limited to shipment to the domestic market) is 1,500 units or more may be subject to recommendations and orders.