Multi speed motors are abbreviated as variable-pole multi-speed three-phase asynchronous motors and are derivative products of the YD series motors. This series achieves stepwise speed regulation by altering the number of stator winding poles, classifying it as a single-winding multi-speed motor.
It features a compact size and high interchangeability with motors of the same type. Compliant with international IEC standards.
Here are some additional data points:

Power ratings	0.45-82kw
Frame sizes	80-280mm
Protection ratings	IP44
Insulation class	B

Power ratings 0.45-82kw
Frame sizes 80-280mm
Protection ratings IP44
Insulation class B

Core Features

Multi speed motors offer numerous advantages in many aspects.
(1) Precise Speed Grading: Support two-speed. Achieves step-by-step speed regulation through winding connection changes, accommodating varying speed requirements across different loads. It also simplifies mechanical speed reduction structures like gearboxes. Then meet long-term
maintenance requirements.
(2)High Efficiency and Energy Savings: Compared to similar motors, its efficiency and power factor are significantly enhanced. Its efficiency improved by approximately 10% compared to traditional single-pole motors . Meanwhile, operational noise and vibration are notably reduced, with noise levels lowered by around 10dB .
(3)Strong Installation Adaptability: No additional adjustments to the mechanical foundation are required. It is compatible with diverse mounting configurations, including horizontal (B3, B5, etc.) and vertical (B14, B35, etc.) installations. Can be driven via flexible couplings, gears, or pulleys, offering excellent interchangeability with comparable international products.
(4)Complete safety certifications: Certain models have obtained mandatory 3C certification and CE certification.

Scope of Application

Multi speed motors are widely used in equipment and industries requiring stepped speed variation, including:

Machine Manufacturing	Universal machine tools, modular machine tools, specialized cutting equipment;
Resource Industries	Mine hoists, metallurgical rolling mills;
Light Industry	extile machinery, printing and dyeing production lines, agricultural machinery;
Fluid Machinery	Fans, pump equipment, etc.

Operating environment

Temperature Conditions	Ambient temperature -15°C to 40°C (customization)
Altitude Restrictions	Not exceeding 1000m; higher altitudes require prior specification;
Power Requirements	380V (customization)
Frequency	50/60Hz
Operating Conditions:	Non-corrosive gas environments with no severe vibration; supports direct, Y/Δ, or reduced-voltage starting.

Model Description

Taking the YD2-63M1-2 as an example,explain the model designation of multi speed motors.

YD2	Motor Series
63	Frame
M	Frame length designation
1	Core length designation
2	Poles

Order Instructions

Please indicate the following information when placing your order:

Motor model: YD200L1
1	Rated Voltage	380V
2	Rated frequency	50Hz
3	Rated power	17/26kw
4	Speed Type	Two-speed
5	Poles	4
6	Protection level	IP44
7	Installation type	IMB3
8	Rotation direction	Clockwise direction (viewed from the extension end of the motor shaft)
9	Outlet box location	at the top of the motor
Note: If you have specific requirements for parameters such as frequency, voltage, ambient temperature, or altitude for multi-speed motor, please clearly specify these when placing your order. If the required data catalog is unavailable, you may also inquire about and request a customized version.

Catalogue

Some of the parameters are as follows:

Frame size	Poles	Mounting Dimensions(mm)										Number of flange holes	Overall Dimensions(mm)
Frame size	Poles	D	E	F	G	M	N	P	R	S	T	Number of flange holes	AC	AD	L
80M	2.4.6.8	19	40	6	15.5	165	130	200	0	12	3.5	4	172	-	330
90S	2.4.6.8	24	50	8	20	165	130	200	0	12	3.5	4	180	-	375
90L	2.4.6.8	24	50	8	20	165	130	200	0	12	3.5	4	180	-	400
100L	2.4.6.8	28	60	8	24	215	180	250	0	15	4	4	214	-	445
112M	2.4.6.8	28	60	8	24	215	180	250	0	15	4	4	223	-	486
132S	2.4.6.8	38	80	10	33	265	230	300	0	15	4	4	270	-	536
132M	2.4.6.8	38	80	10	33	265	230	300	0	15	4	4	270	一	561
160M	2.4.6.8	42	110	12	37	300	250	350	0	19	5	4	325	210	667
160L	2.4.6.8	42	110	12	37	300	250	350	0	19	5	4	325	210	707
180M	2.4.6.8	48	110	14	37	300	250	350	0	19	5	4	360	210	742
180L	2.4.6.8	48	110	14	42.5	300	250	350	0	19	5	4	360	210	762
200L	2.4.6.8	55	110	16	42.5	350	300	400	0	19	5	4	400	256	851
225S	4.8	60	140	18	49	400	350	450	0	19	5	4	450	256	881
225M	2 4.6.8	5560	110140	1618	5349	400400	350350	450450	00	1919	55	48	450450	256256	886911
250M	2 4.6.8	6065	140140	1818	5353	500500	450450	550550	00	1919	55	88	500500	320320	960960
280S	2 4.6.8	6575	140140	1820	5858	500500	450450	550500	00	1919	55	88	560560	320320	10501050
280M	2 4.6.8	6575	140140	1820	67.558	500500	450450	500500	00	1919	55	88	560560	320320	10801080
315S	2 4.6.8.10	6580	140170	1822	67.558	600600	550550	660660	00	2424	66	88	630630	385385	12261356
315M	2 4.6.8.10	6580	140170	1822	7158	600600	550550	660660	00	2424	66	88	630630	385385	13561490
315L	2 4.6.8.10	6580	140170	1822	7158	600600	550550	660660	00	2424	66	88	630630	385385	14901575
355S	2 4.6.8.10	7595	140170	2025	67.586	740740	680680	800800	00	2424	66	88	720720	430430	15701570
355M	2 4.6.8.10	7595	140170	2025	67.586	740740	680680	800800	00	2424	66	88	720720	430430	16501650
355L	2 4.6.8.10	7595	140170	2025	67.586	740740	680680	800800	00	2424	66	88	720720	430430	17501750