Описание

1. Technical Specifications Matrix

ML Series Single Phase Asynchronous Motor Technical Data:

Type	Rated Power		Rated Current (A)			Rated Speed	Efficiency	Power Factor	Rated Torque	Ist/In	Tst/Tn	Tmax/Tn	Noise	Weight
Type	(kW)	(HP)	110V	220V	240V	(r/min)	(η%)	(cosφ)	(N.m)	(times)	(times)	(times)	dB(A)	(kg)
Synchronous Speed 3000 r/min = 2-poles (50Hz)
ML631-2	0.18KW	0.25HP	2.89	1.44	1.32	2710	63	0.9	0.63	5.8	2.5	1.6	70	4
ML632-2	0.25KW	0.34HP	3.95	1.97	1.81	2710	64	0.9	0.88	5.3	2.5	1.6	73	4.5
ML711-2	0.37KW	0.5HP	5.56	2.78	2.55	2780	65	0.93	1.27	5.6	2.5	1.8	75	6
ML712-2	0.55KW	0.75HP	7.91	3.95	3.62	2790	68	0.93	1.88	5.3	2.5	1.8	76	6.5
ML801-2	0.75KW	1HP	10.2	5.09	4.67	2800	72	0.93	2.56	6.2	2.5	1.8	76	9
ML802-2	1.1KW	1.5HP	14.7	7.36	6.75	2810	73	0.93	3.74	5.7	2.5	1.8	79	10
ML90S-2	1.5KW	2HP	19.8	9.91	9.08	2810	74	0.93	5.10	5.8	2.5	1.8	84	13
ML90L-2	2.2KW	3HP	28.4	14.2	13.0	2810	75	0.94	7.48	5.5	2.5	1.8	84	14
ML100L-2	3KW	4HP	37.3	18.6	17.1	2830	77	0.95	10.1	6.2	2.5	1.7	88	24
ML112M-2	4KW	5.5HP	47.8	23.9	21.9	2850	80	0.95	13.4	6.8	2.5	1.7	90	34
Synchronous Speed 1500 r/min = 4-poles (50Hz)
ML631-4	0.12KW	0.16HP	2.20	1.10	1.01	1350	55	0.9	0.85	5.7	2.5	1.6	64	4
ML632-4	0.18KW	0.25HP	3.25	1.62	1.49	1350	56	0.9	1.27	5.5	2.5	1.6	64	4.5
ML711-4	0.25KW	0.34HP	4.21	2.10	1.93	1380	60	0.9	1.73	5.0	2.5	1.7	66	6
ML712-4	0.37KW	0.5HP	5.93	2.97	2.72	1380	63	0.9	2.56	5.3	2.5	1.7	68	6.5
ML801-4	0.55KW	0.75HP	8.42	4.21	3.86	1400	66	0.9	3.75	5.0	2.5	1.8	71	9.5
ML802-4	0.75KW	1HP	11.0	5.49	5.03	1410	69	0.9	5.08	5.7	2.5	1.8	71	10.5
ML90S-4	1.1KW	1.5HP	15.1	7.57	6.94	1410	71	0.93	7.45	5.5	2.5	1.8	74	13.5
ML90L-4	1.5KW	2HP	20.1	10.0	9.21	1400	73	0.93	10.2	5.7	2.5	1.8	79	14.5
ML100L1-4	2.2KW	3HP	29.1	14.5	13.3	1430	74	0.93	14.7	5.4	2.5	1.8	79	24
ML100L2-4	3KW	4HP	39.1	19.6	17.9	1440	75	0.93	19.9	5.9	2.5	1.8	83	29
ML112M-4	4KW	5.5HP	48.9	24.4	22.4	1440	80	0.93	26.5	6.7	2.5	1.7	86	33

ML Series Single Phase Asynchronous Motor Installation Dimension:

Type	Installation Size									Installation Size For B5					Installation Size For B14					Overall Dimension
Type	A	B	C	D	E	F	G	H	K	M	N	P	S	T	M	N	P	S	T	AB	AC	AD	HD	L
56	90	71	36	9	20	3	7.2	56	6	100	80	120	8.5	3	65	50	80	M5	2	112	108	93	149	192
63	100	80	40	11	23	4	8.5	63	7	115	95	140	10	3	75	60	90	M5	2.5	120	120	97	160	211
71	112	90	45	14	30	5	11	71	7	130	110	160	10	3.5	85	70	105	M6	2.5	135	135	107	178	246
80	125	100	50	19	40	6	15.5	80	10	165	130	200	12	3.5	100	80	120	M6	3	155	155	141	221	284
90S	140	100	56	24	50	8	20	90	10	165	130	200	12	3.5	115	95	140	M8	3	175	175	160	250	314
90L	140	125	56	24	50	8	20	90	10	165	130	200	12	3.5	115	95	140	M8	3	175	175	160	250	339
100L	160	140	63	28	60	8	24	100	12	215	180	250	15	4	130	110	160	M8	3.5	200	195	160	260	412
112M	190	140	70	28	60	8	24	112	12	215	180	250	15	4	130	110	160	M8	3.5	226	220	166	278	421

acmotors-EP-ML Series Capacitor Running and Starting Single Phase Asynchronous Motor-Parameter Specifications Table

2. Strategic Overview: Bridging Torque and Efficiency in Single Phase Systems

The Конденсатор серии EP-ML для запуска и работы однофазного асинхронного двигателя. represents the pinnacle of single-phase engineering, specifically designed to address the unique power grid challenges faced by industries in Colombia. Unlike standard split-phase or single-capacitor motors, the EP-ML series utilizes a sophisticated dual-capacitor architecture. It integrates a high-value start capacitor to deliver immense starting torque (up to 2.5 times the rated torque) and a run capacitor to ensure smooth, energy-efficient operation once the motor reaches speed. This hybrid approach makes the EP-ML series the definitive choice for driving high-inertia loads such as heavy-duty air compressors, centrifugal pumps, and agricultural processing machinery found in the Coffee Triangle and the industrial zones of Bogota. Encased in a premium aluminum alloy housing, these motors offer superior heat dissipation and corrosion resistance against the humid tropical climate. At Colombia Ever-power AC Motors Co., Ltd., we ensure that every unit adheres to IEC 60034 standards, providing a robust, maintenance-friendly solution that minimizes downtime and maximizes productivity for Colombian small and medium enterprises (SMEs) relying on single-phase power.

3. Five Engineering Highlights

Dual Capacitor System: Combines high starting torque with high running power factor.
Aluminum Construction: Lightweight, aesthetic, and highly efficient at dissipating thermal buildup.
Centrifugal Switch: Robust internal mechanism ensures seamless transition from start to run mode.
High Overload Capacity: Designed to handle temporary load spikes without stalling.
Voltage Versatility: Available in 110V/220V dual voltage configurations for Colombian grid flexibility.

4. Regulatory Compliance: RETIE and Electrical Safety in Colombia

In the Colombian electromechanical market, compliance with safety standards is not optional; it is mandatory. The EP-ML Series motors are rigorously tested and manufactured in accordance with the RETIE (Reglamento Técnico de Instalaciones Eléctricas). This regulation ensures that all electrical equipment installed in Colombia minimizes the risk of electrocution, fire, and other hazards. Our motors feature high-grade insulation materials (Class B or F) and robust grounding terminals that meet the specifications of NTC 2050 (Código Eléctrico Colombiano). Additionally, the capacitors used in the EP-ML series are certified to withstand the voltage fluctuations often encountered in rural and semi-industrial areas of Colombia, ensuring long lifespan and operational safety. We provide full documentation, including test reports and conformity certificates, to assist our clients in passing local safety inspections and audits.

5. Engineering Mechanics: Working Principle, Metallurgy, and Scenarios

The ac motor working principle of the EP-ML Series is based on creating a rotating magnetic field from a single-phase supply using a phase-splitting technique. The stator contains two windings: the main winding and the auxiliary (start) winding. An ac motor start capacitor is connected in series with the auxiliary winding and a centrifugal switch. This capacitor creates a significant phase shift between the currents in the two windings, generating a powerful starting torque needed to overcome inertia. Once the motor reaches approximately 75% of its synchronous speed, the centrifugal switch opens, disconnecting the start capacitor. However, unlike simple capacitor-start motors, the EP-ML series retains a second “run” ac motor capacitor in the circuit permanently. This run capacitor improves the motor’s power factor, reduces running current, and minimizes noise and vibration during continuous operation, effectively combining the best attributes of high torque and high efficiency.

Regarding metallurgy and construction, the EP-ML series sets a high standard. The housing, end shields, and terminal box are high-pressure die-cast from ADC12 Aluminum Alloy. This material choice offers a superior strength-to-weight ratio compared to cast iron and provides excellent thermal conductivity to keep winding temperatures low. The rotor cage utilizes high-purity die-cast aluminum, dynamically balanced to G2.5 grade to ensure vibration-free performance. The stator laminations are stamped from DW470 Cold-Rolled Silicon Steel, significantly reducing iron losses (hysteresis and eddy currents). This meticulous material selection ensures the motor can withstand the rigors of continuous duty (S1) in challenging industrial environments.

6. Application Scenarios in Colombia:

1. Construction Sector: Driving cement mixers and stone cutters where high starting torque is essential to move heavy loads from a standstill.

2. Agricultural Processing: Powering coffee pulping machines and grain mills in remote areas where only single-phase power is available.

3. Fluid Handling: Operating high-pressure piston pumps and car wash equipment requiring immediate, powerful startup.

4. Woodworking: Table saws and planers that require consistent speed and power to prevent stalling during cuts.

7. Market Trend Analysis: The Demand for Efficiency in Single-Phase Grids

The Colombian market is seeing a distinct shift towards more efficient and reliable single-phase solutions. As urbanization expands and small businesses flourish in areas with limited three-phase infrastructure, the demand for high-performance single-phase motors like the EP-ML series is growing. Traditional single-capacitor motors are being phased out in favor of dual-capacitor models because users require both the high breakaway torque for starting heavy machinery and the energy efficiency provided by a run capacitor. This aligns with global trends where energy conservation is paramount. Furthermore, there is a clear preference for aluminum housings over cast iron in smaller frame sizes (up to 3kW) due to the reduced weight for shipping and installation, as well as the superior aesthetic finish and corrosion resistance in Colombia’s humid environments. The EP-ML series perfectly addresses these market needs by combining robust torque characteristics with modern, lightweight construction.

8. Related Products: Gearboxes and Accessories

Our gearbox is the perfect companion for the Асинхронный трехфазный двигатель серии EP-YS в алюминиевом корпусе, offering superior performance and seamless integration in a wide range of industrial applications. Engineered with precision, our gearboxes are designed to efficiently transfer power from the motor to machinery, optimizing torque and speed for various systems like conveyors, air compressors, and industrial fans.

Made from high-quality materials, our gearboxes feature robust construction for long-lasting durability, even under heavy loads. The gears are manufactured using advanced heat-treatment processes, ensuring excellent wear resistance and minimal maintenance. With a range of gear ratios, our gearboxes offer the flexibility to adjust motor speed and torque to meet the specific demands of your application.

Whether you’re looking to reduce the rotational speed for high-torque output or increase speed for faster operation, our gearboxes provide a reliable and efficient solution. Additionally, they are designed to work in tandem with the EP-YS motor, enhancing its performance and efficiency. From food processing plants in Bogotá to manufacturing units in Medellín, our gearboxes deliver exceptional reliability and smooth operation, reducing downtime and improving overall productivity.

Frequently Asked Questions (FAQ)

Q1. What is the difference between the MC series and the ML series single-phase motors?

A1. The MC series typically refers to “Capacitor Start” motors (one capacitor), designed for high starting torque but lower running efficiency. The EP-ML series is “Capacitor Start and Capacitor Run” (two capacitors). The ML series offers the best of both worlds: high starting torque from the start capacitor and high efficiency/smooth running from the run capacitor, making it superior for heavy-duty applications.

Q2. Can I use the EP-ML motor for an air compressor in Bogota?

A2. Yes, absolutely. Air compressors require a very high starting torque to overcome the pressure in the cylinder head. The EP-ML series, with its dual-capacitor design, is specifically engineered for such high-inertia loads, ensuring reliable startup even if voltage drops slightly, which can happen in industrial zones.

Q3. How do I change the rotation direction of the EP-ML motor?

A3. The rotation direction can be reversed by changing the connection links in the terminal box. You typically need to swap the connections of the auxiliary winding relative to the main winding. A clear ac motor diagram is provided inside the terminal box cover of every EP-ML motor to guide you safely.

Q4. What maintenance is required for the centrifugal switch?

A4. The centrifugal switch is internal and generally maintenance-free. However, in very dusty environments, dust can accumulate on the contacts. If the motor fails to start or the start capacitor doesn’t disengage (you hear a humming or the capacitor blows), the switch should be checked by a professional technician. Our IP55 enclosure helps prevent this issue.

Q5. Are EP-ML motors compliant with Colombian RETIE regulations?

A5. Yes. All EP-ML motors sold by Colombia Ever-power are compliant with RETIE regulations. We ensure proper insulation resistance, grounding provisions, and safety labeling to meet the requirements of the Colombian Ministry of Mines and Energy for electrical installations.

Q6. Where can I find ac motor start capacitor replacement in Colombia?

A6. Capacitors are consumable parts. We supply genuine replacement ac motor start capacitors and run capacitors for our EP-ML series. We can ship these directly to you in Bogota, Medellin, or Cali. It is crucial to replace them with capacitors of the exact same microfarad (µF) and voltage rating.

Q7. What is the difference between ac induction motor and ac synchronous motor?

A7. The EP-ML is an ac induction motor (asynchronous). Its rotor spins slightly slower than the magnetic field (slip) to generate torque. It is robust, cheaper, and self-starting. A synchronous motor spins at the exact grid frequency speed but requires complex starting mechanisms and is more expensive, typically used for precise timing or power factor correction.

Q8. Can I use this motor with a Variable Frequency Drive (VFD)?

A8. Generally, single-phase motors with capacitors and centrifugal switches (like the EP-ML) are NOT suitable for use with standard VFDs. VFDs are designed for three-phase motors. Using a VFD on a single-phase capacitor motor can damage the capacitor and the drive. For variable speed, we recommend a three-phase motor with a single-phase input VFD.

Q9. How does the price of EP-ML motors compare to cast-iron motors?

A9. The EP-ML series features an aluminum housing. While aluminum raw material is more expensive than iron, the die-casting process is efficient for smaller frame sizes. This makes the EP-ML competitively priced while offering the added value of being lightweight, rust-resistant, and aesthetically superior to painted cast iron motors.

Editor: PXY

Конденсатор серии EP-ML для запуска и работы однофазного асинхронного двигателя.